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Anonymous users2024-02-06The one upstairs in the encyclopedia should not engage in plagiarism.
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Anonymous users2024-02-05EVA is a plastic material composed of ethylene (E) and vinyl acetate (VA). The higher the content of vinyl acetate, the higher the transparency, softness and toughness.
EVA and PEVA are characterized by:
1. Biodegradable: It will not cause harm to the environment when discarded or burned.
2. Similar to PVC**: EVA** is more expensive than toxic PVC, but it is cheaper than phthalate-free PVC.
3. Light weight: The density of EVA is between to, while PVC is.
4. No odor: EVA does not contain organic odors like Ammonia or other organic odors.
5. No re-ignition volt metal: in line with relevant international toy regulations (EN-71 Part 3 and ASTM-F963).
6. Phthalate-free: suitable for children's toys and will not produce plasticizer release hazards.
7. High transparency, softness and toughness: the application range is very broad.
8. Super low temperature resistance (-70C): suitable for icing environment.
9. Resistance to water, salt and other substances: it can be stable in the case of large applications.
10. High heat paste: It can be firmly attached to nylon, polyester, canvas and other fabrics.
11. Low lamination temperature: it can speed up production.
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Anonymous users2024-02-04Take a plastic. then perturbation.
It is formed by the copolymerization of ethylene and acetic acid, and due to the introduction of vinyl acetate monomer in the molecular chain, the high crystallinity is reduced, and the toughness, impact resistance, packing compatibility and heat sealing performance are improved.
It is widely used in foam shoe materials, functional shed films, packaging molds, hot melt adhesives, wires and cables and toys, especially in the footwear industry, and is used in the soles and interior materials of medium and high-end tourist shoes, hiking shoes, slippers and sandals.
Classification: 1. EVA with vinyl acetate content below 5%, its main products are films, wires and cables, LDPE modifiers, adhesives, etc.;
2. EVA products with vinyl acetate content of 5% and 10% are elastic films, etc.;
3. EVA with vinyl acetate content of 20-28% is mainly used for hot-melt adhesives and coating products.
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Anonymous users2024-02-03What is EVA, what are the characteristics and application scope of shoe materials?
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