Flexible Packaging 2 Part Polyurethane Adhesive Colorless To Yellowish Color
INTRODUCTION OF 8711
8711A in combination with Hardener 8711B is a two-component polyurethane adhesive for various film/film laminates, 8711A/8711B is used for making high performance composite films. In a variety of film/film composite process it showed excellent bonding performance. This product has low viscosity and shorter curing time; the film has a good wet ability and other characteristics, and has lower solvent residues, suitable for high-solid, low –viscosity and high-speed dry composite processing technology.
1.Preparation of Adhesive Mixture:
After having added the right quantity of solvent to 8711A and having achieved the required solids 8711B has to be stirred into the 8711A/solvent mixture.
When the ethyl acetate is used for dilution, to obtain an accurate solid content, it is required to refer to the following solvents.
* Viscosity is based on the average viscosity of the Ford cup 3/25°C
2.Typical working concentration - viscosity curves are as follows:
The ready-for-use adhesive in closed containers has a working time of about 8 hours. The composite machine is not used up of adhesive, the retention time of more than 4hours, if more than 4 hours should be abandoned, otherwise it may lead to unstable composite films.
Tropical area (Temperature >28°C + humidity >60%)pot life:Mixed good adhesive should be used up within 2 hours.
Appropriate increase in composite temperature and compound roll pressure can improve the bonding effect and surface finish of the composite.
Storage at higher temperatures (40°C-50°C) room, various film/film and film/foil laminates can cutting in 24 hours. Such as curing bag processing should be appropriate to extend the curing time.
The completely cured 8711 polyurethane film is transparent, odorless, elastic and resistant.
6. Matters needing attention
As the adhesive contains polyisocyanates any contact with skin has to be removed.
Introduction of Huitian
Established in 1977, Huitian is now one of the biggest adhesive manufacturers in China. There are four manufacturing bases in total, providing high performance adhesives for different industries.
Huitian has two fully automatic productions lines and the capacity is 24,000MT/Year just for flexibile packaging adhesives.
Huitian's products has been well received by domestic and international end users
Besides construction adhesives, Huitian also provides many others kinds of products for different industries, transportation, electronics, photovaltaic, etc.
Huitian is your reliable partner and satisfy your need of adhesives!