Material classification of EVA products _eva materials
The content of common vinyl acetate (VA) is between 5% and 40%.With polyethylene by, EVA products for the introduction of vinyl acetate monomer in the molecular chain, thus reducing the high crystallinity, increased flexibility, impact resistance, intermiscibility of filling and heat seal performance, EVA products are widely used in foaming shoe materials, functional films, packaging film, hot melt adhesive, wire and cable and jigsaw puzzles, and other fields.
Generally speaking, the performance of EVA products mainly depends on the content of vinyl acetate on the molecular chain.In 2001, the market consumption of natural resins of EVA products in China was about 290kt.With the development of China’s shoe industry and the increase of the amount of functional shed film, the demand for natural resins of EVA products in China will increase year by year.
Material classification of EVA products _eva materials:
The main use of EVA film is to produce functional membrane.Functional films with high weather resistance, prevent droplets and heat preservation performance, because PE do not have polarity, never add a certain amount of droplets remover, its anti droplets performance can only hold about 2 months;The canopy film made by adding a certain amount of EVA natural resin not only has a high light transmittance, but also has a large increase in the performance of anti-fog drops, which can generally exceed 4 months.In addition, EVA products can also be used to produce packaging film, medical film, laminating film, casting film, etc.
Foaming shoe material
Shoe material is the main application field of EVA products in China.In the natural resins of EVA products used in shoe materials, the content of vinyl acetate is generally between 150% and 220%.Because EVA products natural resin blend foam products have soft, good elasticity, resistance to chemical corrosion, such as performance, therefore they are widely used in high-grade sports shoes, mountaineering shoes, slippers, sandals, soles and interior materials.In addition, the material is also used in soundproof panels, split inserts and cladding materials.
Three, seven pieces of flattery
EVA products also have more applications in tangram, such as children’s wheels, seat cushions and so on.In recent years, China’s tangram processing industry has made rapid progress
Natural resins of EVA products are also widely used in ink, case bag, bottle cover and other fields.