Molding plastic mold products customer requirements vary, plastic mold products manufacturers in the production workshop will use some ethylene copolymer to change the performance of different plastic mold products. Heze Dongjian Chemical assistant knows about four kinds of ethylene copolymers, namely EVA, EEA, surlyn resin and EAA.

1, EVA material is the abbreviation of ethylene - vinyl acetate copolymer resin, its performance and material copolymer composition and molecular weight have a great relationship. When the vinyl acetate VA content is lower, the more close to the performance of polyethylene material, vinyl acetate content is increased, its elasticity, flexibility, adhesion and transparency are improved, the melting point is reduced at the same time the mechanical strength is higher and the viscosity of the melt is higher, this polymer can be used alone to form plastic mold products, often used to blend with other resins modified.

2, EEA material ethylene - ethyl acrylate copolymer crystallization properties than polyethylene materials slightly lower, it is soft and elastic and has good tensile strength and low temperature impact resistance, it also has outstanding environmental stress cracking resistance, EEA resistance to more than 300 degrees Celsius processing temperature, this material is especially suitable for no bottom of the high temperature extrusion layer, And the layers made of this material have a good bond.

3. Surlyn resin is a kind of polymer material that introduces metal ions into the copolymer main chain of ethylene and acrylic acid to achieve the cross-linking of the material molecular chain. This material has very low crystallinity, excellent transparency and its light transmittance is 80% ~ 92%, which is a good transparent packaging material.

4, EAA material ethylene-acrylic acid copolymer is also a adhesive resin, especially after special improvement of the variety has more excellent adhesion properties, suitable for multi-layer structure and co-extrusion plastic products in the adhesive layer or sealing material.