Ethylene Vinyl Acetate (EVA)

Overview Polyvinyl alcohol (PVA for short), organic compound, white flake, flocculent or powdered solid, non-toxic, tasteless, pollution-free, can be dissolved in 80--90 °C water. Slightly soluble in dimethyl sulfoxide. Its aqueous solution has good adhesion and film-forming properties; It has chemical properties such as esterification, etherification and acetalation of long-chain polyols. It is a water-soluble polymer with a wide range of uses, its performance is between plastic and rubber, and its uses can be divided into fiber and non-fiber two major uses.

Overview VAE emulsion is short for ethylene acetate-ethylene copolymerization emulsion, which is a polymer emulsion made of ethylene acetate and ethylene monomer as the basic raw materials and other auxiliary materials through emulsion polymerization.Ethylene and vinyl acetate copolymer is the most important product of ethylene copolymer, generally referred to as EVA. According to the different contents of ethylene acetate, the copolymers of ethylene and ethylene acetate were divided into EVA resin, EVA rubber and VAE emulsion.Products containing less than 40% vinyl acetate are EVA resins. Products with a vinyl acetate content of 40%～70% are flexible and elastic, so they are also called EVA rubber. Products with ethylene acetate content in the range of 70%～95% are usually in the emulsion state, called VAE emulsions.

Overview Modified polyvinyl alcohol (PVOH) is graded according to different degrees of polymerization, hydrolysis and copolymerization monomers. The modification of PVA is mainly to use the double bonds, ester groups and the chemical activity of the hydroxyl group after alcoholization of vinyl acetate to change the side chain group or structure, and introduce other monomers to become copolymers dominated by PVA.

Overview Water soluble PVA fiber is a kind of PVA fiber made from polyvinyl alcohol through wet spinning, heat treatment and crimping-oiling in water at normal temperature. It is good in dry heat stability, physical and mechanical properties. The remarkable characteristic is its total dissolving in water at a range of temperature. This kind of PVA fiber is mainly used in Textile industry for making the yarn and cotton.

Overview PVA high strength and high modulus fiber takes polyvinyl alcohol as its major raw materials. It has good prosperities such as high modulus, high strength, alkali and acid resistance, heat resistance, anti-crack, anti-infiltration and so on. High strength and high modulus PVA fiber also has good compatibility with cement and other macromolecule material and can prevent the microcrack caused by plastic shrinkage of the concrete.

Overview Vinyl Acetate Monomer (VAM) is a colorless flammable liquid with sweet ether flavor. Melting point -93.2 °C, boiling point 72.2 °C, 47 °C (40kPa), 9 °C (6.827kPa), -18 °C (1.33kPa), relative density 0.9317, refractive index 1.3953, flash point (open cup) -1 °C. There are several different raw materials such as acetylene method, ethylene method, acetaldehyde acetic anhydride and so on. The route of ethylene raw materials is different according to the process, and there are different methods such as ethylene gas phase method and ethylene liquid phase method.      

Overview EVA is a thermoplastic copolymer manufactured through the free radical polymerization of ethylene and vinyl acetate in the presence of initiating agents using the high-pressure bulk polymerization process. EVA's properties vary dramatically from one product to another depending on the content of vinyl acetate in the macromolecule. EVAs with different properties are used for different purposes.  

Overview Dispersible polymer powder is a modified emulsion powder obtained by spray drying of a binary or ternary copolymer of vinyl acetate and tertiary vinyl carbonate-VeoVa or ethylene or acrylate, which has good redispersibility, redispersed into an emulsion when in contact with water, and its chemical properties are exactly the same as the initial emulsion.

Overview Polyvinyl butyral（PVB for short） is the product of acid catalysis of polyvinyl alcohol and butyraldehyde. Because PVB molecules contain long branched chains, they have good compliance, low glass transition temperature, and high tensile strength and impact strength. PVB has excellent transparency, good solubility, good light resistance, water resistance, heat resistance, cold resistance and film formation. It has high adhesion to materials such as glass and metal (especially aluminum). Therefore, it has been widely used in the manufacture of laminated safety glass, adhesives, ceramic paper, aluminum foil, electrical materials, FRP products, fabric treatment agents and other fields, and has become an indispensable synthetic resin material.

Overview Polyvinyl acetate multipurpose white glue series adopts the latest process and formula to produce water-based adhesives, which have the advantages of high adhesion, fast curing and easy brushing, which effectively solves the problem of low bonding strength and long curing time of white glue, and has good water resistance and moisture resistance after curing.

Overview Polyvinyl alcohol film is made of polyvinyl alcohol as the main component, adding additives such as modifiers, and processed by special technology. PVA film is a green functional material that can be degraded into carbon dioxide and water by microorganisms in the soil in a short time which has the effect of improving land conditions.

Overview PolyVinyl Butyral Film(PVB film) is also known as PVB interlayer.Its essence is a thermoplastic resin film, which is produced from PVB resin plus plasticizer. Since it is produced from plastic resin, it has the characteristics of recyclable processing and reusability.The appearance is translucent film, no impurities, smooth surface, with a certain roughness and good softness, with the adhesion of inorganic glass, transparent, heat resistance, cold resistance, moisture resistance and high mechanical strength characteristics.  

Overview EVOH is a high-barrier material that exhibits excellent foaming properties against gases, fragrances, fragrances, solvents, etc. It also has good processability, transparency, mechanical strength, wear resistance and cold resistance. In terms of food packaging, plastic containers with EVOH barrier layers can replace many glass and metal containers.      

Overview EVOH is a high-barrier material that exhibits excellent foaming properties against gases, fragrances, fragrances, solvents, etc. It also has good processability, transparency, mechanical strength, wear resistance and cold resistance. In terms of food packaging, plastic containers with EVOH barrier layers can replace many glass and metal containers.