According to the material, EVA products can be subdivided into foam, high foaming, rubber, EPE, EVA, PU and other foaming products.
According to the process flow can be divided into: grinding, cold/hot pressing, stamping, silk screen, injection molding and other products,
Sports equipment: grip grinding products, EVA sponge hot pressing, cold pressing set products and various materials stamping products, such as all kinds of fishing tackle products, foam balls, handles, toy rockets, toy knives and guns, EVA silk screen puzzle, wheels, pads, packaging boxes, etc.
EVA products are widely used in electronic appliances, sports equipment, automobile industry, toys, arts and crafts gifts, packaging and other industries.
Stationery and gifts: EVA pen cover, EVA letters, EVA blocks, EVA books, EVA puzzle pieces, EVA smiling faces, EVA seals, sponge mitsubishi, sponge column, pearl cotton column;
Among Eva products, color Eva foam is the most widely used, so how is color Eva foam foamed? The process is as follows:
Color Eva foam tube with Eva as the base material, adding appropriate amount of foaming agent after heating pressure coach foaming, when the temperature rises to the foaming agent decomposition temperature, foaming agent decomposition, release gas and foaming.
In addition, Eva has a certain degree of crystallinity. Before the temperature reaches the melting temperature of crystallization, the fluidity is very poor. However, when the temperature reaches the melting temperature, the melt viscosity drops sharply and the fluidity increases rapidly.
But in order to improve the factors unfavorable to the foam molding, is trying to gas reserves in the basic material, the ideal gas bubble pore structure, must make Eva crosslinking agent occur between molecular chain crosslinking, to adjust the melt viscosity and viscoelasticity, so as to meet the requirement of foaming, and improve physical and mechanical properties of the foam, with organic peroxide crosslinking agent, can meet the above requirements, general with dicumyl peroxide is more ideal.