polyurethane adhesive is a kind of environmentally friendly adhesive, is currently in the rapid development of polyurethane resin is one of the important components, has excellent performance in many aspects, have been widely used, eight is one of the important species in synthetic adhesives.

Research and development of polyurethane adhesive in China started in 60s in the world. After 80s, the research of waterborne polyurethane adhesive in China is more active, but with foreign waterborne polyurethane adhesive series industry compared to the level is still in the development stage. In 90s, due to the import of products in urgent need of localization, the relevant scientific research institutes and production units to increase efforts to develop new products continue to emerge. So far, some foreign adhesive varieties in China now are basically.

Although China polyurethane industry a considerable scale, but there is still a big gap compared with developed countries, the main difference is the overall yield is low, polyurethane in addition, technical level still lags behind some developed countries.

A brief introduction, adhesive

Composite polyurethane adhesive industry sub industry fine chemical adhesive industry, adhesive by means of adhesive effect, can make the glued together material, its variety. According to the China Adhesives Industry Association of adhesive products, mainly divided into the following 6 categories: pressure-sensitive adhesive (tape), polymer emulsion adhesives, rubber adhesives, polyurethane adhesives, hot melt adhesives and adhesives.

Two, composite polyurethane adhesive

By means of adhesive bonding, can make glued together the material, its variety. Among them, containing urethane composite polyurethane adhesive refers to the molecular chain (-NHCOO-) or isocyanate (-NCO) type of adhesive, mainly for bonding film, two or more different or the same properties of sheet material, the formation of a new composite adhesive. The principle:

Classification and performance

Composite polyurethane adhesive product variety, classification methods vary, there are three kinds of common classification methods:

Can be classified according to use: packaging, leather, footwear, textile printing, transportation, household appliances and electronic products, furniture and building materials, new energy safety, composite polyurethane adhesive etc.;

It can be divided into: according to the characteristics of ultra low temperature, foaming, anaerobic, conductivity, high temperature resistance, high resistance, anti-aging, anti media, anti slip agent composite polyurethane adhesive and other categories;

According to the principle of chemical reaction can be divided into: composite polyurethane adhesive, non reactive compound polyurethane adhesive and other two categories. Due to the non reactive compound polyurethane adhesive has environmental protection, production safety and other issues, this year, its market share has gradually been replaced by reactive compound polyurethane adhesive.

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