EVA

Ethylene-vinyl  acetate copolymer (EVA) is obtained by copolymerization of ethylene and vinyl  acetate in different proportions, EVA in the English abbreviation E represents ethylene composition, VA represents vinyl  acetate component, its performance and vinyl a cetate (VA) content is closely related, according to the VA content can be divided into three categories: VA content in 5% Chemicalbook-40% called EVA plastic, mainly used in polyethylene modification, manufacturing wire and cable, film pole other molding products and mixtures; VA content in 40%-90% is called EVA rubber, mainly used in rubber, cables and automotive industry parts; VA content higher than 90% is called polyvinyl a cetate emulsion, mainly used for adhesives, coatings, etc.

1. Water resistance: closed cell structure, non-absorbent, moisture-proof, good water resistance.
2. Corrosion resistance: resistant to seawater, oil, acid, alkali and other chemical corrosion, antibacterial, non-toxic,tasteless, and pollution-free.
3. Processability: no joints, and easy to process such as hot pressing, cutting, gluing, laminating, etc.
4. Anti-vibration: High resilience and tensile strength, high toughness, good shock-proof and cushioning performance.
5. Heat preservation: heat insulation, heat preservation, cold protection and low temperature performance are excellent, and can withstand severe cold and sun exposure.
6. Sound insulation: closed cells, good sound insulation effect.

1. Widely used in foamed shoe materials, functional film, packaging film, hot melt adhesives, wires and cables, toys and other fields.
2. EVA products with a vinylacetate content of 5%~10% are elastic films, etc.;
3. EVA with a vinylacetate content of 20~28% is mainly used for hot melt adhesives and coating products;
4. The content of vinylacetate is 5%~45%. The main products are films (including agricultural films) and sheets, injection molding, molding products, foaming products, hot melt adhesives, etc.
(1) Foam shoe material. In the EVA resin used in shoe materials, the vinylacetate content is generally 15% to 22%. Because EVA resin blended foam products have softness, good elasticity, and chemical corrosion resistance, they are widely used in the soles and interior materials of mid-to-high-end travel shoes, hiking shoes, slippers, and sandals. In addition, this material is also used in the field of sound insulation panels, gym mats and sealing materials.
(2) Film. The main purpose of EVA film is to produce functional greenhouse film. Functional shed film has high weather resistance,anti-fog drop and thermal insulation properties. Since polyethylene is not polar, even if a certain amount of anti-fog drop agent is added, its anti-fog drop performance can only last for about 2 months; while The shed film made by adding a certain amount of EVA resin not only has a high light transmittance, but also has a greatly improved anti-fog performance, which can generally last
for more than 4 months. In addition, EVA can also be used to produce packaging films, medical films, laminated films, casting films, etc.
(3) Wire and cable. Because EVA resin has good filler tolerance and crosslinkability, it is widely used in halogen-free flame-retardant cables, semiconductor shielded cables and two-step si lane crosslinked cables. In addition, EVA resin is also used to make sheaths for some special cables. The EVA resin used in wire and cable generally has a vinylacetate content of 12% to 24%.
(4) TOYS. EVA resin is also widely used in toys, such as children's wheels, seat cushions, etc.
(5) Hot melt adhesive. The hot-melt adhesive with EVA resin as the main component, because it does not contain solvents, does not pollute the environment and has high safety, is very suitable for automated assembly line production, so it is widely used in perfect book binding, furniture edge banding, automobiles and household appliances Assembly, shoemaking, carpet coating and metal anti-corrosion coating.
(6) Others. EVA resin is also widely used in the fields of ink, luggage, wine bottle cover and so on.

Anyị nwere ọtụtụ ụlọ ọrụ dị elu nke nwere nkwado miri emi, nke nwere ike inye gị ngwaahịa dị elu na ọnụ ahịa asọmpi. Anyị nwekwara ike inye ego maka nnukwu ịzụrụ ihe. Anyị na-akwado ọtụtụ ụlọ ọrụ na-ebuga ibu ndị ọkachamara, nwere ike ịnapụta ngwaahịa n'enweghị nsogbu na aka gị. Oge nnyefe bụ ihe dịka ụbọchị 3-20 mgbe nkwenye nke ịkwụ ụgwọ gasịrị.

EVA 
Ir can be processed by many different methods, such as injection molding, extrusion molding, blow molding, calendering and foaming. It is principally used in the production of packaging material, agricultural film, injection-molded products, cable material, foamed plastics, master batch carriers, blending toughening material and damping soundproof material. It can also be used in the production of hot melt adhesive, carpet backing, wax-based coatings and shoe soles. Through hollow molding, EVA can be used for making expandable hoses, micro-irrigation tubes and other types of flexible hoses.
   The resin is packaged in brown paper bags and the net weight is 25Kg/bag. The resin should be stored in a drafty, dry warehouse and away from fire and direct sunlight. It should not be piled up in the open air. During transportation, the material should not be exposed to strong sunlight or rain and should not be transported together with sand, soil, scrap metal, coal or glass.

Application:

1. Good softness and elasticity.
2. Good rebound performance, tension resistance and toughness.
3. Resistance to chemical attacks
4. Inclusiveness and cross-link ability.
5. Non-odor, non-toxic and anti-bacterial
6. Shockproof, soundproof and heat preservation

EVA is widely used in foaming shoe materials, functional shed film, packaging film, hot melt adhesive, wire and cable and toys.
1. Automotive field: steering wheel, car instrument panel, sound insulation panel, door lock interior trim panel, bumper.
2. Daily life: computer, refrigerator, TV, washing machine, air conditioner, copier shell.
3. Tools for building materials: materials for house interiors, drainage pipes, and pipes in low-foam pipes and sewage pipes.
4. Electronic appliances: unlimited routers, mobile device parts, mouse cases, computer keyboards, etc.
5. Sanitary ware: washbasin, toilet cover, towel rack, bathtub, refrigerator shell.
6. Packaging field: transparent packaging box, suitcase, tray.

1. Ị bụ ụlọ ọrụ mmepụta ihe ma ọ bụ ụlọ ọrụ ịzụ ahịa?
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