Ethylene-vinyl acetate copolymer (EVA) is a general-purpose polymer with a molecular formula of (C2H4)x.(C4H6O2)y. It is flammable and has no irritating burning smell.
1. EVA resin is an ethylene-vinyl acetate copolymer. Generally, the vinyl acetate (VA) content is 5% to 40%. Compared with polyethylene, EVA is widely used in foam shoes due to the introduction of vinyl acetate monomer into the molecular chain, thereby reducing the high crystallinity and improving flexibility, impact resistance, filler compatibility and heat sealing properties. Materials, functional shed films, packaging films, hot melt adhesives, wires and cables, toys and other fields.
2. Used as crude oil wax inhibitor and pouring point improver:
3. Used for selective water plugging in oil wells: The oil solution of thermoplastic ethylene-vinyl acetate copolymer can be used for water plugging in deep wells with high temperature and large water output. In the oil layer, ethylene-vinyl acetate copolymer dissolves in the oil and can return with the oil flow; while in the water layer, it is insoluble in water and precipitates highly viscous substances when exposed to water, which creates great resistance to water and blocks the water flow channels;
4. Add it to the thickened water fracturing fluid and use it as a fluid loss reducer.
5. Shoe materials are the most important application field of EVA resin in China. In the EVA resin used in shoe materials, the vinyl acetate content is generally 15% to 22%. Because EVA resin blended foam products have properties such as softness, good elasticity, and resistance to chemical corrosion, they are widely used in soles and interior materials of mid-to-high-end travel shoes, hiking shoes, slippers, and sandals.
6. The main use of EVA film is to produce functional shed films. Functional shed film has high weather resistance, anti-fog and thermal insulation properties. Since polyethylene is not polar, even if a certain amount of anti-fog agent is added, its anti-fog performance can only last for about 2 months; while The shed film made by adding a certain amount of EVA resin not only has higher light transmittance, but also has greatly improved anti-fog performance, which can generally last more than 4 months. In addition, EVA can also be used to produce packaging films, medical films, laminated films, cast films, etc.
7. Because EVA resin has good filler tolerance and cross-linkability, it is widely used in halogen-free flame retardant cables, semiconductor shielded cables and two-step silane cross-linked cables. In addition, EVA resin is also used to make the sheaths of some special cables.
8. EVA resin is also widely used in toys, such as baby wheels, seat cushions, etc.
9. Hot melt adhesive with EVA resin as the main component does not contain solvents, does not pollute the environment and is highly safe. It is very suitable for automated assembly line production. Therefore, it is widely used in wireless book binding, furniture edge sealing, automobiles and In the assembly of household appliances, shoemaking, carpet coating and anti-corrosion coating of metals.
10. It can be used to make refrigerator ducts, gas pipes, civil construction panels, containers and daily necessities, etc. It can also be used to make packaging films, gaskets, medical equipment, and can also be used as hot melt adhesives, cable insulation layers, etc.
11,
1) EVA emulsion is the abbreviation of vinyl acetate-ethylene copolymer emulsion. It is a polymer emulsion formed by copolymerizing vinyl acetate and ethylene monomers with other auxiliary materials through emulsion polymerization.
2), EVA emulsion is mainly used in adhesives, coatings, cement modifiers and paper processing, and has many excellent properties.
3), EVA emulsion has permanent flexibility. EVA emulsion can be regarded as an internal plasticization product of polyvinyl acetate emulsion. Because it introduces an ethylene molecular chain into the polyvinyl acetate molecule, it creates discontinuity in the acetyl group, increases the rotational freedom of the polymer chain, and reduces steric hindrance. Small, the polymer main chain becomes soft, and plasticizer migration does not occur, ensuring that the product is permanently soft.
4), EVA emulsion has good acid and alkali resistance. EVA emulsion can maintain stable performance in the presence of weak acid and weak alkali, so it will not break the emulsion whether mixed with weak acid or weak alkali, and the product has a wide range of applications.
5), EVA emulsion can resist UV aging. Since EVA emulsion uses ethylene as the internal plasticizer of the copolymer, the EVA polymer has internal plasticity and the plasticizer will not migrate, thus avoiding the aging of the polymer properties. Therefore, not only does the EVA emulsion have good stability against ultraviolet rays, but it can also maintain this characteristic after the EVA emulsion is formed into a film.
6), EVA emulsion has good miscibility. EVA emulsion can be mixed with most additives, such as dispersants, wetting agents, antifreezes, defoaming agents, preservatives, flame retardants, etc., thus meeting various needs; EVA emulsion can be mixed with many pigments and fillers, Without agglomeration phenomenon; EVA emulsion can be directly mixed with many low-molecular and high-molecular water-soluble polymers, such as polyvinyl alcohol aqueous solution, polyethylene glycol aqueous solution, starch or modified starch gelatinized solution, sodium polyacrylate aqueous solution, Polymaleic acid aqueous solution, polyoxyethylene aqueous solution, urea-formaldehyde, phenolic aqueous solution, hydroxyethyl cellulose, carboxymethyl cellulose, methyl cellulose aqueous solution, etc.; EVA emulsion can be directly mixed with many other polymer polymer emulsions, such as poly Vinyl acetate emulsion, polyacrylate emulsion; EVA emulsion can be directly mixed with aldehydes, esters, ketones, organic acids, polyols, higher alcohols, halogenated hydrocarbons, aromatic hydrocarbons, etc., such as formaldehyde, glyoxal, diphthalate Butyl ester, dioctyl phthalate, acetic acid, carbon tetrachloride, chloroform, benzene, toluene, xylene, octanol, ethylene glycol, glycerol, ethyl acetate, butyl acetate, etc.
7), EVA emulsion has good film-forming properties. Emulsion adhesives can only form a transparent film at a certain temperature, which is called the minimum film-forming temperature. The minimum film-forming temperature of EVA is generally lower than 5°C, so it can form a film very well, and the film has good barrier properties against water droplets.
8), EVA emulsion has good adhesion. It has a good bonding effect on fiber, wood, paper, plastic film, aluminum foil, cement, ceramics and other products.
9), because EVA emulsion has many excellent properties, it has a very wide range of uses in practical applications.
10), EVA emulsion is widely used as the base material of adhesives. EVA emulsion has good mechanical properties, the average particle size of the emulsion particles is small, there is a good balance between creep resistance and heat sealability, good wet viscosity and fast curing speed. EVA emulsion has a wide range of bonding properties. In addition to bonding materials such as wood, leather, fabric, paper, cement, concrete, aluminum foil, galvanized steel plates, etc., it can also be used as pressure-sensitive adhesive and heat sealant, and it can also be used for some difficult-to-adhere materials. The materials to be connected, such as polyethylene, polypropylene, polyvinyl chloride, polyester and other films, have unique adhesive properties.
11), EVA emulsion can be used as the base material of coatings. Paints made with polyvinyl acetate emulsion, acrylic emulsion, EVA emulsion, styrene-butadiene emulsion, propylbenzene emulsion, acetobenzene emulsion, etc. as base materials are collectively called latex paint. EVA latex paint can be used as interior and exterior wall coatings, roof waterproof coatings, fire retardant coatings, and anti-rust coatings. The EVA latex paint film has good blistering resistance, aging resistance and is not prone to cracking. It has good adhesion to a variety of substrates, is safe, non-toxic, and easy to use. EVA latex paint can not only be coated on wood, masonry and concrete, but also on metal, glass, paper, and fabric surfaces. It also has a good affinity with paint and can be painted on each other's surfaces.
12), EVA emulsion can be used for paper processing. With the development of synthetic polymer technology, many polymer substances play a great role in paper processing. In particular, some synthetic polymer emulsions have more advantages in paper processing, and EVA emulsion is one of them. EVA emulsion is mainly used for paper impregnation, paper coating and pulp addition in paper processing. Its characteristic is that it can glazing a variety of papers, increase the dry and wet strength, toughness, glossiness of paper, improve color stability, and reduce ink printing. consumption and improve paper quality. As a pulp additive, various types of non-asbestos gaskets can be made. EVA emulsion can also be used in special paper processing, such as using dry puffed paper to make disposable napkins, face towels, diapers, sanitary napkins, etc.
13), EVA emulsion can be used as cement modifier. Cement is one of the most widely used materials in construction projects. However, simple cement products have shortcomings such as easy cracking and poor water resistance, impact resistance, and acid resistance, which to a certain extent affects the practical effect of cement. Since the 1920s, people have been committed to research on cement modification. As research continues to deepen, people have found that many synthetic latexes have better effects in cement modification, such as polyvinyl acetate emulsion, acrylic emulsion, styrene-butadiene and toluene emulsion, EVA emulsion, etc. Among them, EVA emulsion has good water resistance, acid and alkali resistance, and weather resistance, and is cheaper than similar products. Therefore, it is being widely used in civil engineering as a new material. In recent years, due to environmental protection considerations, EVA redispersible latex powder has gradually appeared on the market, and has gradually replaced EVA emulsion in cement modifiers and become the main product of cement modifiers.
Qingdao Fangjinlong Technology Development Co., Ltd. was founded in 2010 and is located in Qingdao City, Shandong Province,
on the coast of the beautiful Bohai Bay. Focus on chemical production and sales for more than 20 years; We have all kinds of dangerous goods licenses; Rich experience in safe transportation; Provide high-quality customer service; and Deliver high-quality products and services to all parts of the world anytime, anywhere.
The company invested in and participated in the operation of two production enterprises in 2006, mainly producing chemical products related to water environmental engineering, including Sodium Hypochlorite, Ferric Chloride, sodium acetate, Polyferric Sulfate,
Polyaluminum Chloride, etc. In 2008, in the laboratory independently operated by the company, famous researchers from the
School of Environmental Science and Engineering, Ocean University of China jointly conducted research and development on sewage treatment chemicals and sludge reduction technology and made breakthrough progress. Obtained three national patents in one fell swoop. In the same year, it was awarded the title of high-quality supplier of large water group companies such as Qingdao Water Group, and Everbright Water Group.
In May 2013, the company invested in the establishment of Qingdao Fangjinlong Supply Chain Co., Ltd., an enterprise in China
(Shandong) Qingdao Free Trade Pilot Zone, which greatly promoted the development of international business. The expansion of
main products involves mining chemical products, petrochemical products, sewage treatment chemical products, food additives, etc.
In order to facilitate the transportation of goods, the company cooperates with well-known freight companies in Huangdao District, Qingdao, and can independently complete the storage and transshipment business of the warehouse, which greatly improves the convenience and safety of goods transportation. Up to now, the company has reached long-term and stable cooperative relations
with 36 companies from South America, North America, Europe, the Middle East, Russia, and other countries and regions. In 2022, the export volume exceeded 80 million US dollars, accounting for 30% of the company's total revenue.
For many years, relying on our rich market experience, precise corporate strategy, and excellent scientific and technological talents, the company has been steadily and continuously moving forward on the track of specialization and diversification.
Audited Supplier 
Ethylene-vinyl acetate copolymer (EVA) is a general-purpose polymer with a molecular formula of (C2H4)x.(C4H6O2)y. It is flammable and has no irritating burning smell.
){kind=link}
){kind=link}