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776A 776B Solvent-Based Flexible Packaging Adhesive Fast Curing For PET/AL/PE, PET/VMPET/PE, PET/VMCPP, PET/PE, OPP/VMCPP

776A 776B Solvent-Based Flexible Packaging Adhesive Fast Curing For PET/AL/PE, PET/VMPET/PE, PET/VMCPP, PET/PE, OPP/VMCPP

776A 776B Solvent-Based Flexible Packaging Adhesive Fast Curing For PET/AL/PE, PET/VMPET/PE, PET/VMCPP, PET/PE, OPP/VMCPP

Product Details:
Place of Origin: China
Brand Name: Weeton
Certification: FDA 175.105
Model Number: 776A 776B
Detail Information
Place of Origin:
China
Brand Name:
Weeton
Certification:
FDA 175.105
Model Number:
776A 776B
Mixing Rate:
1:1 (mass Ratio)
Part A:
Hydroxyl
Part B:
Isocyanate
Flash Point:
-4℃
Solvent:
Ethyl Acetate(EA)
Color:
Yellowish Colorless To Yellowish
Trading Information
Minimum Order Quantity:
200KG
Price:
Negotiation
Packaging Details:
A: 20KG/bucket B: 20KG/bucket
Delivery Time:
7-15days
Payment Terms:
T/T, L/C
Supply Ability:
200,000Kg/Month
Product Description

TDS Weeton 776A 776B EN.pdf

Weeton 776A /776B is a two-component polyurethane adhesive for flexible lamination valid for various plastic film, aluminum film and aluminum foil and alike substrate. WeetonTM776A /776B provides good adhesion featuring a very high initial tack, excellent solvent release, perfect compatibility, good wetting, good heat resistance and good chemical resistance.

 

776A/776B is recommended for applications requiring a faster curing speed, 776A/776B adhesive product has high compatibility with the slip agent, can be used for wPE(>=80um)like OPP/PE, NY/ (w)PE, and so on. For aluminum foil structure,776A /776B shows an excellent positioning force and peel strength build-up.

Under proper conditions, 776A /776B used for film/film structures, can withstand boiling treatment.

 

Properties

Product Name 776A                                                      776B
Component Isocyanate                                                 Hydroxyl
Mixing Ratio 1:1 (mass ratio)
Solids Content 75±2%                                                       75±2%
Viscosity

1150 ± 500mPa.s

(Brookfield RVT,25°C)

1000±500mPa.s

(Brookfield LVT, 25°C)

Color Yellowish Colorless to yellowish
Flash Point -4°C                                                              -4°C
Solvent Ethyl acetate                                               Ethyl acetate
Density 1.09 g / cm3                                               1.08 g / cm3

 

Directions for use

  • Dilution: Suitable solvents are ethyl acetate (EA),  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 776A and having achieved t the required solid content, 776B has to be stirred into the 776A 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

776A 776B Solvent Solid Content Viscosity
20KG 20KG 26.7 KG 45% 16-18s
20KG 20 KG 35.0 KG 40% 13-15s
20KG 20 KG 45.7 KG 35% 12-13s
20KG 20 KG 60.0 KG 30% 11-12s

* Viscosity is based on the average viscosity of the Ford cup 3# (25°C).

  • Pot life: The ready-for-use adhesive in closed containers has a working time of about 24 hours. If the laminating machine doesn’t use up adhesive, the retention time shouldn’t be more than 2 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.

  • Coating: 776 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 adhesive weight may range from 2.0-3.5g/m2 (dry). For printed laminates the weight has to be adjusted accordingly, it should be approx.0.5-1g/m2 higher than for unprinted films.
  • 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.
  • 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 (35-45°C) or similar wild enviromnent, various film/film and film/foil the laminates will be ready for cutting within around 24 h. Nevertheness, the curing time should be extended if the laminates are used for bagging.

Film properties: The completely cured 776A/776B polyurethane film is transparent, odorless, elastic and aging-resistant.

 

Product certification

776A/776B 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: 776 has a storage life of 12 months when stored at a cool and dry place in unopened containers. Once opened, containers of 776A/776B 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

776A:20KG/bucket                  776B:20KG/bucket

 

Notes

When using 776 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.

 

776A 776B Solvent-Based Flexible Packaging Adhesive Fast Curing For PET/AL/PE, PET/VMPET/PE, PET/VMCPP, PET/PE, OPP/VMCPP 0

776A 776B Solvent-Based Flexible Packaging Adhesive Fast Curing For PET/AL/PE, PET/VMPET/PE, PET/VMCPP, PET/PE, OPP/VMCPP 1

776A 776B Solvent-Based Flexible Packaging Adhesive Fast Curing For PET/AL/PE, PET/VMPET/PE, PET/VMCPP, PET/PE, OPP/VMCPP 2

 
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