Brand List
740A 740B Solvent-Based High-End Flexible Packaging Adhesive Medium Resistance (Acid, Alkali, Spicy, Ethyl Maltol Etc.) Meet PET/AL/PA/PE, PET/VMPET/PE boiling and PET/PET/RCPP;PET/AL/PA/RCPP cooking
TDS Weeton 740A 740B EN.pdf
Weeton 740A/740B is a two-component solvent-based polyurethane adhesive that is widely used to make high-performance laminating films and exhibits excellent bonding properties in a variety of film/film and film/aluminum foil lamination processes.
Application
The product can be used in structures like PET/AL/PA/PE, PET/VMPET/PE, PET/VMCPP, PET/PET/RCPP, and PET/AL/PA/RCPP, which can also suit high machine-speed process lamination, with good solvent release, heat resistance ( Meet PET/AL/PA/PE, PET/VMPET/PE boiling and PET/PET/RCPP;PET/AL/PA/RCPP c ooking at 125-135℃ ), and chemical media resistance ( acid, alkali, spicy, ethyl maltol and certain alcohol etc. )
Properties
Product Name
740 A 740 B
Mixing Ratio
100:1 (mass ratio)
Solids Content
60±2% 100%
Viscosity
1,000 ± 500mPa.s
(Brookfield LVT,25°C)
≤100mPa.s
(Brookfield LVT, 25°C)
Color
Colorless to yellowish Colorless to yellowish
Flash Point
-4°C 118°C
Solvent
Ethyl acetate --
Density
1.08 g / cm 3 1.02 g / cm 3
Directions for use
Add solvent to component 740 to achieve the required solids content, then add component 740B to the diluted component 740 mixture and stir well until the color is uniform. The ratio of the main agent/hardener can be adjusted according to the temperature and humidity, and the solvent moisture content. High Temperature can work for up to 40 minutes at 121°C.
Dilution table
740A
7 40B
Solvent
Solid Content
Viscosity
100KG
1KG
51.50 KG
40 %
20-25 s
100KG
1KG
73.28 KG
35 %
16-20 s
100KG
1KG
102.30 KG
30 %
13-16 s
100KG
1KG
143.00 KG
25 %
11-13 s
Pot life
The ready-for-use adhesive in closed containers has a working time of about 6 hours. Unused adhesive on the laminator should not be left on for more than 2 hours, if more than 2 hours it should be discarded or it may result in an unstable laminating film. In tropical areas (temperature > 28°C & relative humidity > 60%), the mixed adhesive should be used up within 2 hours.
Recommended Operating Conditions
1 . Coating: 740A/740B is suitable for dry film laminating machines with smooth roller or gravure roller. Before mass production, repeated trials should be carried out to determine the fitting roller.
2 . Coating weight: Depending on the film or foil combination and the end use of the laminate, the adhesive weight should be above 2.0g/m2 (dry). The coating weight of 3.5 g is suitable for strong chemicals and high temperatures.
For printed laminates the weight has to be adjusted accordingly, The Recommended working solids content of 30%-35%, with the corresponding roller.
3 . Pressure adjustment: An appropriate increase in laminating temperature and pressure can improve the bonding strength and surface finish of the laminates. The recommended temperature of the roller is 65-75℃.
4 . Curing: Film/film, film/aluminum foil of general, poaching, boiling products at 40 ℃ -60 ℃ curing room 2-7 days after full curing can be slitting, bag making.
5 . Film properties: The completely cured 740A/740B film is transparent and odorless.
FDA Compliance
740A/740B is suitable for laminating food packaging materials in accordance with US FDA 175.105 and Chinese GB- 9685. After sizing, the fully cured adhesive material complies with the EU 2002/72/EC and its Supplementary Agreement 2004/19/EC on the restriction of migration of certain substances.
Storage/Transport
Storage: 740A/740B are recommended to be stored in a cool and dry place, away from sunlight and high temperatures. When unopened it should be stored in the original closed container. The main agent 740A is valid for 12 months and the hardener 740B for 12 months. Open the storage container, after use it should be recovered and sealed, and the rest of the product should be used up within a short period of time.
Transport: Please refer to the relevant MSDS for details.
Packaging specifications
740A:20 KG/bucket;
740B:1 KG/bucket
Notes
When using 740A/740B an efficient exhaust hood has to be installed to the coating unit due to safety reasons. The exhaust efficiency has to be checked prior to production by gas analysis for isocyanate concentration in the air. Safety regulations with regard to handling of isocyanates have to be followed as per the guidelines issued by the International Isocyanates
Institute. Please also refer to the local safety instructions as well as our safety data sheet and contact Huitian for analytical support.
As the adhesive contains polyisocyanates, any contact with the skin has to be removed.
Other information and Disclaimer
Film additives - especially in PE, CPP, and EVA copolymer films - slip agent content, type and thickness of the film, the filler, printing inks, pretreatment for printing, and film coating are all critical to the end use and can affect the bonding properties immediately or at a later stage. In order to obtain good lamination results, practical lamination trials and proper testing of the laminates are necessary before large-scale production.
* For detailed information, please refer to Huitian's "Technical Guide to Adhesive Lamination".
How to Select
HUITIAN Profile
Huitian is your reliable partner and satisfies your need for adhesives!

711A 711B Solvent-Based Laminating Adhesive Flexible Packaging Adhesive For Aluminum-Plated Plastic Structure Composite Aluminum Plastic Boiling
TDS Weeton 711A 711B EN.pdf
Weeton 711A/ harder 711B two-component solvent-based polyurethane adhesive is a two-component polyurethane adhesive for various high-performance film/film laminates.
Application
In a variety of film /film laminating process, it shows excellent bonding performance, including PET/AL/PE, PET/VMPET/PE, PET/VMCPP, PET/PE, OPP/VMCPP. This product has low viscosity and short curing time ( Meet the 2-3 layer structure curing, 6-8h slitting and bag making ) , the film h as good wettability and low solvent residues, suitable for high-solid, low-viscosity and high-speed dry film laminating technology.
Properties
Product Name
711 A 711B
Component
Hydroxyl Isocyanate
Mixing Ratio
20:4(mass ratio)
Solids Content
75±2% 75±2%
Viscosity
3,650±1,050mPa.s
(Brookfield LVT,25°C)
2,000±1,000mPa.s
(Brookfield LVT,25°C)
Solvent
Ethyl acetate Ethyl acetate
Flash Point
-4°C -4°C
Color
Colorless to light yellow Colorless to light yellow
Density
1.04 g/cm 3 1.1 g/cm 3
Directions for use
Dilution: The suitable solvent is ethyl acetate, using water content not exceeding 300ppm, when the solvent contains active hydrogen (such as alcohols, and amines), it will react with the curing agent, resulting in a reduction of the curing agent and affect the strength; Do not use aromatic or alcoholic solvents.
Preparation of Adhesive Mixture: After having added the right quantity of solvent to 711A and having achieved the required solid content, 711B has to be stirred into the 711A solvent mixture.
List of Dilution: When the ethyl acetate is used for dilution to obtain an accurate solid content, the amount required should refer to the following table
711A
711B
Solvent
Solid Content
Viscosity
20KG
4KG
21.00 KG
40 %
8-11 s
20KG
4KG
27.43 KG
35 %
7-10 s
20KG
4KG
36.00 KG
30 %
6-9 s
20KG
4KG
48.00 KG
25 %
5-8 s
Viscosity is based on the average viscosity of the Zahn Cup 3# (25°C)
4. Pot life: Unused adhesive on the laminating machine should be discarded if it has been stored for more than 8 hours, otherwise it may affect the product performance of the laminated film. Particular attention should be paid to laminating films that require high-temperature treatment and laminating films filled with irritants.
Tropical area (Temperature >28°C + humidity >60%) pot life: Ready-for-use adhesive should be used up within 2 hours.
5 . Coating: 711A/711B is suitable for dry film laminating machines with smooth roller or gravure roller. Before mass production, repeated trials should be carried out to determine the fitting roller.
6 . Coating weight: Depending on the film or foil combination and the end use of the laminate, the adhesive weight may range from 2.0g/m 2 (dry). For printed laminates the weight has to be adjusted accordingly, it should be approx.0.5-1.0g/m 2 higher than for unprinted films. The coating amount should be adjusted according to the raw materials and processing technology of the product.
7 . Dry: The laminating machine should have good air volume, wind speed, wind pressure, and the appropriate temperature to avoid residual solvents. Temperature setting generally follows the gradient principle (55°C-65°C, 65°C-75°C, 70°C-85°C). Adjust the temperature of the oven according to the performance of the processed products, raw materials, and processing technology.
8 . Pressure adjustment: An appropriate increase in laminating temperature and pressure can improve the bonding strength and surface finish of the laminates.
9 . Curing: The composite film should be aged in the curing room, the curing temperature is 45-55℃, and the curing time is 2-4 days. The preliminary composite film should be matured for at least 12 hours before rewinding or manufacturing 3 layers of composite film, and bag-making should be carried out after complete curing.
1 0 . Film properties: The completely cured 711 polyurethane film is transparent, odorless, elastic and aging-resistant.
Product certification
711A/711B is suitable for laminating food packaging materials in accordance with US FDA 175.105 and Chinese GB- 9685. After sizing, the fully cured adhesive material complies with the EU 2002/72/EC and its Supplementary Agreement 2004/19/EC on the restriction of migration of certain substances.
Storage/Transport
Storage: 711 has a storage life of 12 months when stored at a cool and dry place in unopened containers. Once opened, containers of 711A/711B should be closed tightly again and the material should be consumed within a short period.
Transport: For details please refer to the corresponding safety data sheets.
Packaging specifications
711A:20KG/bucket 711B:4KG/bucket
Notes
When using 711 an efficient exhaust hood has to be installed to the coating unit due to safety reasons. The exhaust efficiency has to be checked prior to production by gas analysis for isocyanate concentration in the air. Safety regulations with regard to the handling of isocyanates have to be followed as per the guidelines issued by the International Isocyanates Institute. Please also refer to the local safety instructions and our safety data sheet and contact Huitian for analytical support.
As the adhesive contains polyisocyanates, any contact with the skin has to be removed.
Others
Film particularly the types and content of slip agents in LDPE, MDPE and CPP films, film thickness, packed goods, printing inks, pre-treatment, and film coating are of significant importance to the end use of the laminates and may affect the performance properties either directly or indirectly. Therefore, practical laminating tests as well as checks on the laminates are necessary before going into full-scale production. The above information is from the laboratory for reference only.
How to Select
HUITIAN Profile
Huitian is your reliable partner and satisfies your need for adhesives!

856A 856B Two-Component Functional Solvent-Free Flexible Packaging Adhesive Plastic Structure, Aluminum-Plastic/Aluminum-Coated Structure Inner Layer Composite, Plastic Structure Boiling, Steaming
TDS Weeton 856A 856B EN.pdf
Weeton 856A/856B is a two-component solvent-free flexible packaging laminating adhesive widely used in plastic/plastic, plastic/aluminum, and other material structures of the composite, high-strength pharmaceutical packaging foil, the aluminum-plated structure of the inner layer, suitable for plastic/plastic structure of the boiling and steaming. It has the characteristics of high peel strength, excellent surface wettability, excellent heat resistance, long pot life, and no smell.
858A/ hardener 856B two-component solvent-free adhesive has medium viscosity and excellent wetting performance, which meets the requirements of high-speed laminating (0 - 300 m / min). 858A/ hardener 856B does not affect the openness of the inner layer of the composite film, the adhesive layer is transparent after curing, odorless, elastic, and resistant to aging.
The typical applicable structure is as follows +:
PET/Milky white PE, PET/PE
PET/CPP
AI/PE (Ordinary medium)
PA/PE, PA/PCPP
+: Film should get appropriate surface tension by corona treatment
*According to the environmental humidity and the film's composite structure, the ratio can be adjusted between 100: 50-70, high temperature and high humidity are appropriate to reduce the 856B content, and the CPP structure is suitable to increase the curing temperature and the amount of glue; solvent-free composite workshop with air conditioning in the summer, leave the workshop as soon as possible into the drying room, to avoid excessive humidity in the workshop, alternating hot and cold moisture cooling on the surface of the film, resulting in excessive moisture.
Properties
Product Name
856A 856B
Component
Isocyanate component Hydroxyl component
Mixing Ratio
100:60* (mass ratio)
Solids Content
100% 100%
Viscosity
700-1,800mPa.s
(Brookfield LVT,25°C)
700-1,500mPa.s
(Brookfield LVT, 25°C)
Color
Colorless to light yellow transparent Colorless to light yellow transparent
Density
1.15±0.05 g/cm 3 1.15±0.05 g/cm 3
Directions for use
Ratio: The standard mass ratio 858A/hardener 856B = 100: 60 can be fine-tuned according to the properties of the product, the ink, the packaging material, and the operating conditions.
Mix method: Mix by automatic mixing machine, mix evenly before use.
Coating system temperature setting: Recommended mixing and coating operating temperature parameters are shown in the "Typical Use Parameters column" and can be adjusted according to the actual conditions of use.
Coating: Suitable for specialized laminating equipment with multi-roll coating systems.
Coating weight: Depending on the combination of plastic film or aluminum foil and the end use of the laminated film, the coating amount of the adhesive can range from 1.2 to 2.5 g / m 2 . Usually, for printed film lamination, the coating amount needs to be increased appropriately when the structure is AI/CPP.
Adding: Use a two-component dosing and mixing unit to add the adhesive continuously to the adhesive tank of the solvent-free laminator. The adhesive in the tank should be kept as fresh as possible to avoid abnormal viscosity affecting the coating result.
Pot life: 858A/Hardener 856B component has a pot lifetime of about 40-50 minutes at 45°C after mixing and shows reliable workability. See Figure 1 below.
Laminating conditions: Precise tension control and proper winding procedures prevent delamination, roll head size difference, and film curl.
Curing: Cure at 38 - 45℃ for 18-24h for rewinding and slitting. Aluminum foil composite products usually need to be cured at 45℃~50℃ for 36~48 hours, winter AI/CPP structures need to increase the curing time to 48~60 hours.
Cleaning: When the machine is shut down for more than 40 minutes, the metering roll position adhesive can no longer be used and the coating unit needs to be cleaned with a solvent/plasticizer mixture (refer to Safety Precautions). The two-roller coating unit also needs to be cleaned and the same cleaning procedure should be carried out at the end of the start-up period.
Pot life
Figure1: 856A/ hardener 856B Standard proportioning 100:60 pot life (45℃)
Typical Use Parameters
Glue container: 856ASummer 36-38℃ Winter 40-42℃
Hardener856B Summer 34-37℃ Winter 40-42℃
Rubber hose: 856ASummer 38℃ Winter 40℃
Hardener856B Summer 35℃ Winter 40℃
Metering roller: 35-38℃
Coating roller: 35-38℃
Pot life: about 40-50mins (after mixing)
Coating weight: 1.2-3.5 g/m 2
Laminating temperature: 35-40℃
Laminating machine speed: 0-300 m/min
Curing time: 35-38℃/12-36h (60-70%RH)
FDA Compliance
856A/856B is suitable for laminating food packaging materials in accordance with US FDA 175.105 and Chinese GB- 9685. After sizing, the fully cured adhesive material complies with the EU 2002/72/EC and its Supplementary Agreement 2004/19/EC on the restriction of migration of certain substances.
Storage & Transport
Storage: 856A/856B are recommended to be stored in a cool and dry place, away from sunlight and high temperatures. When unopened it should be stored in the original closed container. The main agent 856A is valid for 12 months and the hardener 856B for 12 months. Open the storage container, after use, it should be recovered and sealed, and the rest of the product should be used up within a short period of time.
Transport: Please refer to the relevant MSDS for details.
Packaging specifications
856A:20 KG/bucket, Special requirement 200KG/Drum; 856B:20 KG/bucket Special requirement 200KG/Drum.
Notes
When using 858A/ hardener856B an efficient exhaust hood should be installed to the coating unit due to safety reasons. The exhaust efficiency has to be checked prior to production by gas analysis for isocyanate concentration in the air. Safety regulations with regard to the handling of isocyanates have to be followed as per the guidelines issued by the International Isocyanates Institute. Please also refer to the local safety instructions as well as our safety data sheet and contact Huitian for analytical support.
Special Note:858B In cold winter, there will be small lumps is a normal phenomenon, before use in the drying room preheating can be melted or in the dosing tank can be melted, which does not affect the use.
Other information and D isclaimer
Film additives (especially slipping agents) for packaged goods, printing inks, and pretreatment of films and coatings are critical to the end use of the laminated product and can directly or indirectly affect performance. In order to obtain good lamination results, practical lamination trials and proper testing of the laminates are necessary before large-scale production.
* For detailed information, please refer to Huitian's "Technical Guide to Adhesive Lamination".
Huitian is your reliable partner and satisfies your need for adhesives!

765A 765B Solvent-Based Laminating Adhesive Flexible Packaging Adhesive For Aluminum-Plastic Aluminum-Plated Plastic Structure Composite 125℃ Steaming
TDS Weeton 765A 765B EN.pdf
Weeton 765 is a two-component polyurethane adhesive for high-performance laminates. It shows good adhesion in film/film and film/foil structures and is suitable for Al foil-containing and puncture-resistant packages. It also has good resistance to retort (121°C/40min).
Properties
Product Name
765 A 76 5 B
Mixing Ratio
20:3.5 (mass ratio)
Solids Content
65±2% 75±2%
Viscosity
2000 ± 1000mPa.s
(Brookfield LVT,25°C)
2800±1500mPa.s
(Brookfield LVT, 25°C)
Color
Colorless to yellowish Colorless to yellowish
Flash Point
-4°C -4°C
Solvent
Ethyl acetate Ethyl acetate
Density
1.1 g / cm 3 1.1 g / cm 3
Directions for use
Dilution and Preparation of Adhesive Mixture: After having added the right quantity of solvent to 765A and having achieved the required solid content, 765B has to be stirred into the 765A/solvent mixture.
List of Dilution: When the ethyl acetate is used for dilution to obtain an accurate solid content, the amount required should refer to the following table.
765 A
765B
Solvent
Solid Content
Viscosity
20KG
3.5KG
11.22KG
45%
16-19s
20KG
3.5KG
21.14KG
35%
13-17s
20KG
3.5KG
28.5KG
30%
10-15s
20KG
3.5KG
39KG
25%
8-12s
Viscosity is based on the average viscosity of the Zahn Cup 3# (25°C)
Pot life: The ready-for-use adhesive in closed containers has a working time of about 8 hours. If the laminating machine doesn’t use adhesive, the retention time shouldn’t be more than 2 hours. Otherwise, the adhesive should be abandoned, or it may result in unstable composite films. Tropical area (Temperature >28°C + humidity >60%) pot life: Ready-for-use adhesive should be used up within 2 hours.
Coating: 765 is suitable for dry film laminating machine with smooth roller or gravure roller. Before mass production, repeated trials should be carried out to determine fitting roller.
Coating weight: Depending on the film or foil combination and the end use of the laminate, the coating weight may be above 2.8g/m 2 (dry). For printed laminates, the weight has to be adjusted accordingly.
Pressure adjustment: An appropriate increase in laminating temperature and pressure can improve the bonding strength and surface finish of the laminates.
Curing: Stored in curing chamber (40-50°C), the laminates will be ready for cutting in 72h, at least 48h.
Film properties: The completely cured 765A/765B film is transparent, odorless, elastic and aging-resistant.
Product certification
765A/765B is suitable for laminating food packaging materials in accordance with US FDA 175.105 and Chinese GB- 9685. After sizing, the fully cured adhesive material complies with the EU 2002/72/EC and its Supplementary Agreement 2004/19/EC on the restriction of migration of certain substances.
Storage/Transport
Storage: 765 has a storage life of 12 months when stored at a cool and dry place in unopened containers. Once opened, containers of 765A/765B should be closed tightly again and the material should be consumed within a short period.
Transport: For details please refer to the corresponding safety data sheets.
Packaging specifications
765A:20KG/bucket 765B:4KG/bucket
Notes
When using 765 an efficient exhaust hood has to be installed to the coating unit due to safety reasons. The exhaust efficiency has to be checked prior to production by gas analysis for isocyanate concentration in the air. Safety regulations with regard to the handling of isocyanates have to be followed as per the guideline issued by the International Isocyanates Institute. Please also refer to the local safety instructions as well as our safety data sheet and contact Huitian for analytical support.
As the adhesive contains polyisocyanates, any contact with the skin has to be removed.
Others
Film particularly the types and content of slip agents in LDPE, MDPE and CPP films, film thickness, packed goods, printing inks, pre-treatment, and film coating are of significant importance to the end use of the laminates and may affect the performance properties either directly or indirectly. Therefore, practical laminating tests as well as checks on the laminates are necessary before going into full scale production.
Huitian is your reliable partner and satisfies your need for adhesives!

728 2K Polyurethane Adhesive For Various Film/Film And Film/Metalized Film Laminates good flexibility & Transparency
TDS Weeton 728A 728B EN.pdf
Weeton 728 is a two-component polyurethane adhesive for various film/film and film/metalized film laminates. This product has good flexibility and good transparency, can effectively reduce the characteristics of aluminum transfer, and prevent the phenomenon of tunnel.
Properties
Product Name
728 A 728 B
Mixing Ratio
20:4(mass ratio)
Solids Content
75±2% 75±2%
Viscosity
2000±500mPa.s
(Brookfield LVT Rotor 2 / 30rpm,25 °C)
2000±1000mPa.s
(Brookfield LVT Rotor 2 / 30rpm,25 °C)
Solvent
Ethyl acetate Ethyl acetate
Flash Point
-4°C -4°C
Color
Colorless to yellowish
Directions for use
Dilution: Suitable solvents are ethyl acetate, and Methylethylketone provided that the water content does not exceed 300 ppm. Do not use aromatic or alcoholic solvents.
Preparation of Adhesive Mixture: After having added the right quantity of solvent to 728A and having achieved the required solids 728B has to be stirred into the 728A/solvent mixture.
List of Dilution: When the ethyl acetate is used for dilution, to obtain an accurate solid content, it is required to refer to the following solvents.
728A
7 28B
Solvent
Solid Content
Viscosity
20KG
4KG
21.0KG
40%
8-11s
20KG
4KG
27.4KG
35%
7-10s
20KG
4KG
36.0KG
30%
6-9s
20KG
4KG
48.0KG
25%
5-8s
Viscosity is based on the average viscosity of the Zahn Cup 3# (25°C)
4. Pot life: The ready-for-use adhesive in closed containers has a working time of about 8 hours. If the laminating machine doesn’t use adhesive, the retention time shouldn’t be more than 4 hours. Otherwise, the adhesive should be abandoned, or it may result in unstable laminated film.
Tropical area (Temperature >28°C + humidity >60%) pot life: Ready-for-use adhesive should be used up within 2 hours.
5. Coating: 728 is suitable for dry film laminating machines with smooth roller or gravure roller. Before mass production, repeated trials should be carried out to determine the fitting roller.
6. Application weight: Depending on the film or foil combination and the end use of the laminate, the adhesive weight may range from 2.0g/m 2 (dry). For printed laminates the weight has to be adjusted accordingly, it should be approx.0.5-1g/m 2 higher than for unprinted films.
7. Dry: The laminating machine should have good air volume, wind speed, wind pressure and the appropriate temperature to avoid residual solvents. Temperature setting generally follows gradient principle (55°C-65°C, 65°C-75°C, 70°C-85°C). Adjust the temperature of the oven according to the performance of the processed products, raw materials, processing technology.
8. Pressure adjustment: An appropriate increase in laminating temperature and pressure can improve the bonding effect and surface finish of the laminates.
9. Curing: Stored in a curing chamber (45-55°C), the laminates will be ready for cutting in 24h. The curing time should be extended if the laminates are used for bagging.
10. Film properties: The completely cured 728 polyurethane film is transparent, odorless, elastic and aging-resistant.
Product certification
728A/728B are suitable for laminating food packaging materials in accordance with US FDA 175.105 and Chinese GB- 9685. After sizing, the fully cured adhesive material complies with the EU 2002/72/EC and its Supplementary Agreement 2004/19/EC on the restriction of migration of certain substances.
Storage/Transport
Storage: 728 have a storage life of 9 months when stored at a cool and dry place in unopened containers. Once opened, containers of 728A/728B should be closed tightly again and the material should be consumed within a short period.
Transport: For details please refer to the corresponding safety data sheets.
Packaging specifications
728A:20KG/bucket
728B:4KG/bucket
Notes
When using 728 an efficient exhaust hood has to be installed to the coating unit due to safety reasons. The exhaust efficiency has to be checked prior to production by gas analysis for isocyanate concentration in the air. Safety regulations with regard to the handling of isocyanates have to be followed as per the guidelines issued by the International Isocyanates Institute. Please also refer to the local safety instructions as well as our safety data sheet and contact Huitian for analytical support.
As the adhesive contains polyisocyanates any contact with skin has to be removed.
Others
Film particularly the types and content of slip agents in LDPE, MDPE and CPP films, film thickness, packed goods, printing inks, pre-treatment, and film coating are of significant importance to the end use of the laminates and may affect the performance properties either directly or indirectly. Therefore, practical laminating tests as well as checks on the laminates are necessary before going into full-scale production.
Huitian is your reliable partner and satisfies your need for adhesives!

720H/700 Solvent-based Laminating Adhesive Flexible Packaging Adhesive Suitable for aluminum-plastic, aluminum-plated, plastic-plastic structure composite, aluminum-plastic boiling
TDS Weeton 720H 700 EN.pdf
Weeton 720H/700 is a two-component polyurethane adhesive for various film/film and film/foil laminates. The product has high initial adhesion, high peeling strength, good transparency, and can effectively prevent the tunnel phenomenon.
Properties
Product Name
720H 700
Mixing Ratio
20:3.5(mass ratio)
Solids Content
72±2% 75±2%
Viscosity
5, 500±500mPa.s
(Brookfield LVT Rotor 2 / 30rpm,25 °C)
2,000±1,000mPa.s
(Brookfield LVT Rotor 2 / 30rpm,25 °C)
Solvent
Ethyl acetate Ethyl acetate
Flash Point
-4°C -4°C
Color
Colorless to yellowish Colorless to yellowish
Directions for use
1. Dilution: The suitable solvent is ethyl acetate, using water content not exceeding 300ppm, when the solvent contains active hydrogen (such as alcohols, and amines), it will react with the curing agent, resulting in a reduction of the curing agent and affecting the strength; Do not use aromatic or alcoholic solvents.
2. Mixing method: After having added the right quantity of solvent to 720H and having achieved the required solid content, 700 has to be stirred into the 720H/solvent mixture.
3 . List of Dilution: When the ethyl acetate is used for dilution to obtain an accurate solid content, the amount required should refer to the following table
720H
700
Solvent
Solid Content
Viscosity
20KG
3.5KG
19.1 KG
40 %
9-12 s
20KG
3.5KG
25.1 KG
35 %
8-11 s
20KG
3.5KG
33.3 KG
30 %
7-10 s
20KG
3.5KG
44.6 KG
25 %
6-9 s
Viscosity is based on the average viscosity of the Zahn Cup 3# (25°C)
4 . Pot life: The ready-for-use adhesive in closed containers has a working time of about 8 hours. If the laminating machine doesn’t use up adhesive, the retention time shouldn’t be more than 4 hours. Otherwise, the adhesive should be abandoned, or it may result in unstable laminated film.
Tropical area (Temperature >28°C + humidity >60%) pot life: Ready-for-use adhesive should be used up within 2 hours.
5 . Coating: 720H/700 is suitable for dry film laminating machines with smooth roller or gravure roller. Before mass production, repeated trials should be carried out to determine the fitting roller.
6 . Coating weight: Depending on the film or foil combination and the end use of the laminate, the adhesive weight may range from 2.0g/m 2 (dry). For printed laminates, the weight has to be adjusted accordingly.
7 . Pressure adjustment: Appropriate increase in laminating temperature and pressure can improve the bonding effect
and surface finish of the laminates.
8 . Dry: The laminating machine should have good air volume, wind speed, wind pressure and the appropriate temperature to avoid residual solvents. Temperature setting generally follows gradient principle (55°C-65°C, 65°C-75°C, 70°C-85°C). Adjust the temperature of the oven according to the performance of the processed products, raw materials, processing technology.
9 . Curing: Stored in a curing chamber (45-55°C), the laminates will be ready for cutting in 24h. The curing time should be extended if the laminates are used for bagging.
10 . Film properties: The completely cured 720H/700 polyurethane film is transparent, odorless, elastic and aging-resistant.
Product certification
720H/700 are suitable for laminating food packaging materials in accordance with US FDA 175.105 and Chinese GB- 9685. After sizing, the fully cured adhesive material complies with the EU 2002/72/EC and its Supplementary Agreement 2004/19/EC on the restriction of migration of certain substances.
Storage/Transport
Storage: 720 has a storage life of 12 months when stored at a cool and dry place in unopened containers. Once opened, containers of 728A/728B should be closed tightly again and the material should be consumed within a short period.
Transport: For details please refer to the corresponding safety data sheets.
Packaging specifications
720H:20KG/bucket
700:3.5KG/bucket
Notes
When using 720 an efficient exhaust hood has to be installed to the coating unit due to safety reasons. The exhaust efficiency has to be checked prior to production by gas analysis for isocyanate concentration in the air. Safety regulations with regard to the handling of isocyanates have to be followed as per the guidelines issued by the International Isocyanates Institute. Please also refer to the local safety instructions as well as our safety data sheet and contact Huitian for analytical support.
As the adhesive contains polyisocyanates any contact with skin has to be removed.
Others
Film particularly the types and content of slip agents in LDPE, MDPE and CPP films, film thickness, packed goods, printing inks, pre-treatment, and film coating are of significant importance to the end use of the laminates and may affect the performance properties either directly or indirectly. Therefore, practical laminating tests as well as checks on the laminates are necessary before going into full-scale production.
Huitian is your reliable partner and satisfies your need for adhesives!

740A 740B Solvent-Based High-End Flexible Packaging Adhesive Medium Resistance (Acid, Alkali, Spicy, Ethyl Maltol Etc.) Meet PET/AL/PA/PE, PET/VMPET/PE boiling and PET/PET/RCPP;PET/AL/PA/RCPP cooking
TDS Weeton 740A 740B EN.pdf
Weeton 740A/740B is a two-component solvent-based polyurethane adhesive that is widely used to make high-performance laminating films and exhibits excellent bonding properties in a variety of film/film and film/aluminum foil lamination processes.
Application
The product can be used in structures like PET/AL/PA/PE, PET/VMPET/PE, PET/VMCPP, PET/PET/RCPP, and PET/AL/PA/RCPP, which can also suit high machine-speed process lamination, with good solvent release, heat resistance ( Meet PET/AL/PA/PE, PET/VMPET/PE boiling and PET/PET/RCPP;PET/AL/PA/RCPP c ooking at 125-135℃ ), and chemical media resistance ( acid, alkali, spicy, ethyl maltol and certain alcohol etc. )
Properties
Product Name
740 A 740 B
Mixing Ratio
100:1 (mass ratio)
Solids Content
60±2% 100%
Viscosity
1,000 ± 500mPa.s
(Brookfield LVT,25°C)
≤100mPa.s
(Brookfield LVT, 25°C)
Color
Colorless to yellowish Colorless to yellowish
Flash Point
-4°C 118°C
Solvent
Ethyl acetate --
Density
1.08 g / cm 3 1.02 g / cm 3
Directions for use
Add solvent to component 740 to achieve the required solids content, then add component 740B to the diluted component 740 mixture and stir well until the color is uniform. The ratio of the main agent/hardener can be adjusted according to the temperature and humidity, and the solvent moisture content. High Temperature can work for up to 40 minutes at 121°C.
Dilution table
740A
7 40B
Solvent
Solid Content
Viscosity
100KG
1KG
51.50 KG
40 %
20-25 s
100KG
1KG
73.28 KG
35 %
16-20 s
100KG
1KG
102.30 KG
30 %
13-16 s
100KG
1KG
143.00 KG
25 %
11-13 s
Pot life
The ready-for-use adhesive in closed containers has a working time of about 6 hours. Unused adhesive on the laminator should not be left on for more than 2 hours, if more than 2 hours it should be discarded or it may result in an unstable laminating film. In tropical areas (temperature > 28°C & relative humidity > 60%), the mixed adhesive should be used up within 2 hours.
Recommended Operating Conditions
1 . Coating: 740A/740B is suitable for dry film laminating machines with smooth roller or gravure roller. Before mass production, repeated trials should be carried out to determine the fitting roller.
2 . Coating weight: Depending on the film or foil combination and the end use of the laminate, the adhesive weight should be above 2.0g/m2 (dry). The coating weight of 3.5 g is suitable for strong chemicals and high temperatures.
For printed laminates the weight has to be adjusted accordingly, The Recommended working solids content of 30%-35%, with the corresponding roller.
3 . Pressure adjustment: An appropriate increase in laminating temperature and pressure can improve the bonding strength and surface finish of the laminates. The recommended temperature of the roller is 65-75℃.
4 . Curing: Film/film, film/aluminum foil of general, poaching, boiling products at 40 ℃ -60 ℃ curing room 2-7 days after full curing can be slitting, bag making.
5 . Film properties: The completely cured 740A/740B film is transparent and odorless.
FDA Compliance
740A/740B is suitable for laminating food packaging materials in accordance with US FDA 175.105 and Chinese GB- 9685. After sizing, the fully cured adhesive material complies with the EU 2002/72/EC and its Supplementary Agreement 2004/19/EC on the restriction of migration of certain substances.
Storage/Transport
Storage: 740A/740B are recommended to be stored in a cool and dry place, away from sunlight and high temperatures. When unopened it should be stored in the original closed container. The main agent 740A is valid for 12 months and the hardener 740B for 12 months. Open the storage container, after use it should be recovered and sealed, and the rest of the product should be used up within a short period of time.
Transport: Please refer to the relevant MSDS for details.
Packaging specifications
740A:20 KG/bucket;
740B:1 KG/bucket
Notes
When using 740A/740B an efficient exhaust hood has to be installed to the coating unit due to safety reasons. The exhaust efficiency has to be checked prior to production by gas analysis for isocyanate concentration in the air. Safety regulations with regard to handling of isocyanates have to be followed as per the guidelines issued by the International Isocyanates
Institute. Please also refer to the local safety instructions as well as our safety data sheet and contact Huitian for analytical support.
As the adhesive contains polyisocyanates, any contact with the skin has to be removed.
Other information and Disclaimer
Film additives - especially in PE, CPP, and EVA copolymer films - slip agent content, type and thickness of the film, the filler, printing inks, pretreatment for printing, and film coating are all critical to the end use and can affect the bonding properties immediately or at a later stage. In order to obtain good lamination results, practical lamination trials and proper testing of the laminates are necessary before large-scale production.
* For detailed information, please refer to Huitian's "Technical Guide to Adhesive Lamination".
How to Select
HUITIAN Profile
Huitian is your reliable partner and satisfies your need for adhesives!

711A 711B Solvent-Based Laminating Adhesive Flexible Packaging Adhesive For Aluminum-Plated Plastic Structure Composite Aluminum Plastic Boiling
TDS Weeton 711A 711B EN.pdf
Weeton 711A/ harder 711B two-component solvent-based polyurethane adhesive is a two-component polyurethane adhesive for various high-performance film/film laminates.
Application
In a variety of film /film laminating process, it shows excellent bonding performance, including PET/AL/PE, PET/VMPET/PE, PET/VMCPP, PET/PE, OPP/VMCPP. This product has low viscosity and short curing time ( Meet the 2-3 layer structure curing, 6-8h slitting and bag making ) , the film h as good wettability and low solvent residues, suitable for high-solid, low-viscosity and high-speed dry film laminating technology.
Properties
Product Name
711 A 711B
Component
Hydroxyl Isocyanate
Mixing Ratio
20:4(mass ratio)
Solids Content
75±2% 75±2%
Viscosity
3,650±1,050mPa.s
(Brookfield LVT,25°C)
2,000±1,000mPa.s
(Brookfield LVT,25°C)
Solvent
Ethyl acetate Ethyl acetate
Flash Point
-4°C -4°C
Color
Colorless to light yellow Colorless to light yellow
Density
1.04 g/cm 3 1.1 g/cm 3
Directions for use
Dilution: The suitable solvent is ethyl acetate, using water content not exceeding 300ppm, when the solvent contains active hydrogen (such as alcohols, and amines), it will react with the curing agent, resulting in a reduction of the curing agent and affect the strength; Do not use aromatic or alcoholic solvents.
Preparation of Adhesive Mixture: After having added the right quantity of solvent to 711A and having achieved the required solid content, 711B has to be stirred into the 711A solvent mixture.
List of Dilution: When the ethyl acetate is used for dilution to obtain an accurate solid content, the amount required should refer to the following table
711A
711B
Solvent
Solid Content
Viscosity
20KG
4KG
21.00 KG
40 %
8-11 s
20KG
4KG
27.43 KG
35 %
7-10 s
20KG
4KG
36.00 KG
30 %
6-9 s
20KG
4KG
48.00 KG
25 %
5-8 s
Viscosity is based on the average viscosity of the Zahn Cup 3# (25°C)
4. Pot life: Unused adhesive on the laminating machine should be discarded if it has been stored for more than 8 hours, otherwise it may affect the product performance of the laminated film. Particular attention should be paid to laminating films that require high-temperature treatment and laminating films filled with irritants.
Tropical area (Temperature >28°C + humidity >60%) pot life: Ready-for-use adhesive should be used up within 2 hours.
5 . Coating: 711A/711B is suitable for dry film laminating machines with smooth roller or gravure roller. Before mass production, repeated trials should be carried out to determine the fitting roller.
6 . Coating weight: Depending on the film or foil combination and the end use of the laminate, the adhesive weight may range from 2.0g/m 2 (dry). For printed laminates the weight has to be adjusted accordingly, it should be approx.0.5-1.0g/m 2 higher than for unprinted films. The coating amount should be adjusted according to the raw materials and processing technology of the product.
7 . Dry: The laminating machine should have good air volume, wind speed, wind pressure, and the appropriate temperature to avoid residual solvents. Temperature setting generally follows the gradient principle (55°C-65°C, 65°C-75°C, 70°C-85°C). Adjust the temperature of the oven according to the performance of the processed products, raw materials, and processing technology.
8 . Pressure adjustment: An appropriate increase in laminating temperature and pressure can improve the bonding strength and surface finish of the laminates.
9 . Curing: The composite film should be aged in the curing room, the curing temperature is 45-55℃, and the curing time is 2-4 days. The preliminary composite film should be matured for at least 12 hours before rewinding or manufacturing 3 layers of composite film, and bag-making should be carried out after complete curing.
1 0 . Film properties: The completely cured 711 polyurethane film is transparent, odorless, elastic and aging-resistant.
Product certification
711A/711B is suitable for laminating food packaging materials in accordance with US FDA 175.105 and Chinese GB- 9685. After sizing, the fully cured adhesive material complies with the EU 2002/72/EC and its Supplementary Agreement 2004/19/EC on the restriction of migration of certain substances.
Storage/Transport
Storage: 711 has a storage life of 12 months when stored at a cool and dry place in unopened containers. Once opened, containers of 711A/711B should be closed tightly again and the material should be consumed within a short period.
Transport: For details please refer to the corresponding safety data sheets.
Packaging specifications
711A:20KG/bucket 711B:4KG/bucket
Notes
When using 711 an efficient exhaust hood has to be installed to the coating unit due to safety reasons. The exhaust efficiency has to be checked prior to production by gas analysis for isocyanate concentration in the air. Safety regulations with regard to the handling of isocyanates have to be followed as per the guidelines issued by the International Isocyanates Institute. Please also refer to the local safety instructions and our safety data sheet and contact Huitian for analytical support.
As the adhesive contains polyisocyanates, any contact with the skin has to be removed.
Others
Film particularly the types and content of slip agents in LDPE, MDPE and CPP films, film thickness, packed goods, printing inks, pre-treatment, and film coating are of significant importance to the end use of the laminates and may affect the performance properties either directly or indirectly. Therefore, practical laminating tests as well as checks on the laminates are necessary before going into full-scale production. The above information is from the laboratory for reference only.
How to Select
HUITIAN Profile
Huitian is your reliable partner and satisfies your need for adhesives!

856A 856B Two-Component Functional Solvent-Free Flexible Packaging Adhesive Plastic Structure, Aluminum-Plastic/Aluminum-Coated Structure Inner Layer Composite, Plastic Structure Boiling, Steaming
TDS Weeton 856A 856B EN.pdf
Weeton 856A/856B is a two-component solvent-free flexible packaging laminating adhesive widely used in plastic/plastic, plastic/aluminum, and other material structures of the composite, high-strength pharmaceutical packaging foil, the aluminum-plated structure of the inner layer, suitable for plastic/plastic structure of the boiling and steaming. It has the characteristics of high peel strength, excellent surface wettability, excellent heat resistance, long pot life, and no smell.
858A/ hardener 856B two-component solvent-free adhesive has medium viscosity and excellent wetting performance, which meets the requirements of high-speed laminating (0 - 300 m / min). 858A/ hardener 856B does not affect the openness of the inner layer of the composite film, the adhesive layer is transparent after curing, odorless, elastic, and resistant to aging.
The typical applicable structure is as follows +:
PET/Milky white PE, PET/PE
PET/CPP
AI/PE (Ordinary medium)
PA/PE, PA/PCPP
+: Film should get appropriate surface tension by corona treatment
*According to the environmental humidity and the film's composite structure, the ratio can be adjusted between 100: 50-70, high temperature and high humidity are appropriate to reduce the 856B content, and the CPP structure is suitable to increase the curing temperature and the amount of glue; solvent-free composite workshop with air conditioning in the summer, leave the workshop as soon as possible into the drying room, to avoid excessive humidity in the workshop, alternating hot and cold moisture cooling on the surface of the film, resulting in excessive moisture.
Properties
Product Name
856A 856B
Component
Isocyanate component Hydroxyl component
Mixing Ratio
100:60* (mass ratio)
Solids Content
100% 100%
Viscosity
700-1,800mPa.s
(Brookfield LVT,25°C)
700-1,500mPa.s
(Brookfield LVT, 25°C)
Color
Colorless to light yellow transparent Colorless to light yellow transparent
Density
1.15±0.05 g/cm 3 1.15±0.05 g/cm 3
Directions for use
Ratio: The standard mass ratio 858A/hardener 856B = 100: 60 can be fine-tuned according to the properties of the product, the ink, the packaging material, and the operating conditions.
Mix method: Mix by automatic mixing machine, mix evenly before use.
Coating system temperature setting: Recommended mixing and coating operating temperature parameters are shown in the "Typical Use Parameters column" and can be adjusted according to the actual conditions of use.
Coating: Suitable for specialized laminating equipment with multi-roll coating systems.
Coating weight: Depending on the combination of plastic film or aluminum foil and the end use of the laminated film, the coating amount of the adhesive can range from 1.2 to 2.5 g / m 2 . Usually, for printed film lamination, the coating amount needs to be increased appropriately when the structure is AI/CPP.
Adding: Use a two-component dosing and mixing unit to add the adhesive continuously to the adhesive tank of the solvent-free laminator. The adhesive in the tank should be kept as fresh as possible to avoid abnormal viscosity affecting the coating result.
Pot life: 858A/Hardener 856B component has a pot lifetime of about 40-50 minutes at 45°C after mixing and shows reliable workability. See Figure 1 below.
Laminating conditions: Precise tension control and proper winding procedures prevent delamination, roll head size difference, and film curl.
Curing: Cure at 38 - 45℃ for 18-24h for rewinding and slitting. Aluminum foil composite products usually need to be cured at 45℃~50℃ for 36~48 hours, winter AI/CPP structures need to increase the curing time to 48~60 hours.
Cleaning: When the machine is shut down for more than 40 minutes, the metering roll position adhesive can no longer be used and the coating unit needs to be cleaned with a solvent/plasticizer mixture (refer to Safety Precautions). The two-roller coating unit also needs to be cleaned and the same cleaning procedure should be carried out at the end of the start-up period.
Pot life
Figure1: 856A/ hardener 856B Standard proportioning 100:60 pot life (45℃)
Typical Use Parameters
Glue container: 856ASummer 36-38℃ Winter 40-42℃
Hardener856B Summer 34-37℃ Winter 40-42℃
Rubber hose: 856ASummer 38℃ Winter 40℃
Hardener856B Summer 35℃ Winter 40℃
Metering roller: 35-38℃
Coating roller: 35-38℃
Pot life: about 40-50mins (after mixing)
Coating weight: 1.2-3.5 g/m 2
Laminating temperature: 35-40℃
Laminating machine speed: 0-300 m/min
Curing time: 35-38℃/12-36h (60-70%RH)
FDA Compliance
856A/856B is suitable for laminating food packaging materials in accordance with US FDA 175.105 and Chinese GB- 9685. After sizing, the fully cured adhesive material complies with the EU 2002/72/EC and its Supplementary Agreement 2004/19/EC on the restriction of migration of certain substances.
Storage & Transport
Storage: 856A/856B are recommended to be stored in a cool and dry place, away from sunlight and high temperatures. When unopened it should be stored in the original closed container. The main agent 856A is valid for 12 months and the hardener 856B for 12 months. Open the storage container, after use, it should be recovered and sealed, and the rest of the product should be used up within a short period of time.
Transport: Please refer to the relevant MSDS for details.
Packaging specifications
856A:20 KG/bucket, Special requirement 200KG/Drum; 856B:20 KG/bucket Special requirement 200KG/Drum.
Notes
When using 858A/ hardener856B an efficient exhaust hood should be installed to the coating unit due to safety reasons. The exhaust efficiency has to be checked prior to production by gas analysis for isocyanate concentration in the air. Safety regulations with regard to the handling of isocyanates have to be followed as per the guidelines issued by the International Isocyanates Institute. Please also refer to the local safety instructions as well as our safety data sheet and contact Huitian for analytical support.
Special Note:858B In cold winter, there will be small lumps is a normal phenomenon, before use in the drying room preheating can be melted or in the dosing tank can be melted, which does not affect the use.
Other information and D isclaimer
Film additives (especially slipping agents) for packaged goods, printing inks, and pretreatment of films and coatings are critical to the end use of the laminated product and can directly or indirectly affect performance. In order to obtain good lamination results, practical lamination trials and proper testing of the laminates are necessary before large-scale production.
* For detailed information, please refer to Huitian's "Technical Guide to Adhesive Lamination".
Huitian is your reliable partner and satisfies your need for adhesives!

765A 765B Solvent-Based Laminating Adhesive Flexible Packaging Adhesive For Aluminum-Plastic Aluminum-Plated Plastic Structure Composite 125℃ Steaming
TDS Weeton 765A 765B EN.pdf
Weeton 765 is a two-component polyurethane adhesive for high-performance laminates. It shows good adhesion in film/film and film/foil structures and is suitable for Al foil-containing and puncture-resistant packages. It also has good resistance to retort (121°C/40min).
Properties
Product Name
765 A 76 5 B
Mixing Ratio
20:3.5 (mass ratio)
Solids Content
65±2% 75±2%
Viscosity
2000 ± 1000mPa.s
(Brookfield LVT,25°C)
2800±1500mPa.s
(Brookfield LVT, 25°C)
Color
Colorless to yellowish Colorless to yellowish
Flash Point
-4°C -4°C
Solvent
Ethyl acetate Ethyl acetate
Density
1.1 g / cm 3 1.1 g / cm 3
Directions for use
Dilution and Preparation of Adhesive Mixture: After having added the right quantity of solvent to 765A and having achieved the required solid content, 765B has to be stirred into the 765A/solvent mixture.
List of Dilution: When the ethyl acetate is used for dilution to obtain an accurate solid content, the amount required should refer to the following table.
765 A
765B
Solvent
Solid Content
Viscosity
20KG
3.5KG
11.22KG
45%
16-19s
20KG
3.5KG
21.14KG
35%
13-17s
20KG
3.5KG
28.5KG
30%
10-15s
20KG
3.5KG
39KG
25%
8-12s
Viscosity is based on the average viscosity of the Zahn Cup 3# (25°C)
Pot life: The ready-for-use adhesive in closed containers has a working time of about 8 hours. If the laminating machine doesn’t use adhesive, the retention time shouldn’t be more than 2 hours. Otherwise, the adhesive should be abandoned, or it may result in unstable composite films. Tropical area (Temperature >28°C + humidity >60%) pot life: Ready-for-use adhesive should be used up within 2 hours.
Coating: 765 is suitable for dry film laminating machine with smooth roller or gravure roller. Before mass production, repeated trials should be carried out to determine fitting roller.
Coating weight: Depending on the film or foil combination and the end use of the laminate, the coating weight may be above 2.8g/m 2 (dry). For printed laminates, the weight has to be adjusted accordingly.
Pressure adjustment: An appropriate increase in laminating temperature and pressure can improve the bonding strength and surface finish of the laminates.
Curing: Stored in curing chamber (40-50°C), the laminates will be ready for cutting in 72h, at least 48h.
Film properties: The completely cured 765A/765B film is transparent, odorless, elastic and aging-resistant.
Product certification
765A/765B is suitable for laminating food packaging materials in accordance with US FDA 175.105 and Chinese GB- 9685. After sizing, the fully cured adhesive material complies with the EU 2002/72/EC and its Supplementary Agreement 2004/19/EC on the restriction of migration of certain substances.
Storage/Transport
Storage: 765 has a storage life of 12 months when stored at a cool and dry place in unopened containers. Once opened, containers of 765A/765B should be closed tightly again and the material should be consumed within a short period.
Transport: For details please refer to the corresponding safety data sheets.
Packaging specifications
765A:20KG/bucket 765B:4KG/bucket
Notes
When using 765 an efficient exhaust hood has to be installed to the coating unit due to safety reasons. The exhaust efficiency has to be checked prior to production by gas analysis for isocyanate concentration in the air. Safety regulations with regard to the handling of isocyanates have to be followed as per the guideline issued by the International Isocyanates Institute. Please also refer to the local safety instructions as well as our safety data sheet and contact Huitian for analytical support.
As the adhesive contains polyisocyanates, any contact with the skin has to be removed.
Others
Film particularly the types and content of slip agents in LDPE, MDPE and CPP films, film thickness, packed goods, printing inks, pre-treatment, and film coating are of significant importance to the end use of the laminates and may affect the performance properties either directly or indirectly. Therefore, practical laminating tests as well as checks on the laminates are necessary before going into full scale production.
Huitian is your reliable partner and satisfies your need for adhesives!

728 2K Polyurethane Adhesive For Various Film/Film And Film/Metalized Film Laminates good flexibility & Transparency
TDS Weeton 728A 728B EN.pdf
Weeton 728 is a two-component polyurethane adhesive for various film/film and film/metalized film laminates. This product has good flexibility and good transparency, can effectively reduce the characteristics of aluminum transfer, and prevent the phenomenon of tunnel.
Properties
Product Name
728 A 728 B
Mixing Ratio
20:4(mass ratio)
Solids Content
75±2% 75±2%
Viscosity
2000±500mPa.s
(Brookfield LVT Rotor 2 / 30rpm,25 °C)
2000±1000mPa.s
(Brookfield LVT Rotor 2 / 30rpm,25 °C)
Solvent
Ethyl acetate Ethyl acetate
Flash Point
-4°C -4°C
Color
Colorless to yellowish
Directions for use
Dilution: Suitable solvents are ethyl acetate, and Methylethylketone provided that the water content does not exceed 300 ppm. Do not use aromatic or alcoholic solvents.
Preparation of Adhesive Mixture: After having added the right quantity of solvent to 728A and having achieved the required solids 728B has to be stirred into the 728A/solvent mixture.
List of Dilution: When the ethyl acetate is used for dilution, to obtain an accurate solid content, it is required to refer to the following solvents.
728A
7 28B
Solvent
Solid Content
Viscosity
20KG
4KG
21.0KG
40%
8-11s
20KG
4KG
27.4KG
35%
7-10s
20KG
4KG
36.0KG
30%
6-9s
20KG
4KG
48.0KG
25%
5-8s
Viscosity is based on the average viscosity of the Zahn Cup 3# (25°C)
4. Pot life: The ready-for-use adhesive in closed containers has a working time of about 8 hours. If the laminating machine doesn’t use adhesive, the retention time shouldn’t be more than 4 hours. Otherwise, the adhesive should be abandoned, or it may result in unstable laminated film.
Tropical area (Temperature >28°C + humidity >60%) pot life: Ready-for-use adhesive should be used up within 2 hours.
5. Coating: 728 is suitable for dry film laminating machines with smooth roller or gravure roller. Before mass production, repeated trials should be carried out to determine the fitting roller.
6. Application weight: Depending on the film or foil combination and the end use of the laminate, the adhesive weight may range from 2.0g/m 2 (dry). For printed laminates the weight has to be adjusted accordingly, it should be approx.0.5-1g/m 2 higher than for unprinted films.
7. Dry: The laminating machine should have good air volume, wind speed, wind pressure and the appropriate temperature to avoid residual solvents. Temperature setting generally follows gradient principle (55°C-65°C, 65°C-75°C, 70°C-85°C). Adjust the temperature of the oven according to the performance of the processed products, raw materials, processing technology.
8. Pressure adjustment: An appropriate increase in laminating temperature and pressure can improve the bonding effect and surface finish of the laminates.
9. Curing: Stored in a curing chamber (45-55°C), the laminates will be ready for cutting in 24h. The curing time should be extended if the laminates are used for bagging.
10. Film properties: The completely cured 728 polyurethane film is transparent, odorless, elastic and aging-resistant.
Product certification
728A/728B are suitable for laminating food packaging materials in accordance with US FDA 175.105 and Chinese GB- 9685. After sizing, the fully cured adhesive material complies with the EU 2002/72/EC and its Supplementary Agreement 2004/19/EC on the restriction of migration of certain substances.
Storage/Transport
Storage: 728 have a storage life of 9 months when stored at a cool and dry place in unopened containers. Once opened, containers of 728A/728B should be closed tightly again and the material should be consumed within a short period.
Transport: For details please refer to the corresponding safety data sheets.
Packaging specifications
728A:20KG/bucket
728B:4KG/bucket
Notes
When using 728 an efficient exhaust hood has to be installed to the coating unit due to safety reasons. The exhaust efficiency has to be checked prior to production by gas analysis for isocyanate concentration in the air. Safety regulations with regard to the handling of isocyanates have to be followed as per the guidelines issued by the International Isocyanates Institute. Please also refer to the local safety instructions as well as our safety data sheet and contact Huitian for analytical support.
As the adhesive contains polyisocyanates any contact with skin has to be removed.
Others
Film particularly the types and content of slip agents in LDPE, MDPE and CPP films, film thickness, packed goods, printing inks, pre-treatment, and film coating are of significant importance to the end use of the laminates and may affect the performance properties either directly or indirectly. Therefore, practical laminating tests as well as checks on the laminates are necessary before going into full-scale production.
Huitian is your reliable partner and satisfies your need for adhesives!
