![]() ![]() EVA can be used as a substitute for cork in many applications.ĮVA copolymers are adhesives used in packaging, textile, bookbinding for bonding plastic films, metal surfaces, coated paper, and as redispersible powders in plasters and cement renders. In fishing rods, EVA is used to construct handles on the rod-butt end. EVA slippers and sandals are popular, being lightweight, easy to form, odourless, glossy, and cheaper compared to natural rubber. It is also used in the photovoltaics industry as an encapsulation material for crystalline silicon solar cells in the manufacture of photovoltaic modules. In addition, because of its buoyancy, EVA has made its way into non-traditional products such as floating eyewear. ) It is used for the manufacture of floats for commercial fishing gear such as purse seine ( seine fishing) and gillnets. (Some manufacturers of running shoes, such as Nike, market EVA-based compression-moulded foam used in the manufacture of running shoes as "Phylon". It is typically used as a shock absorber in sports shoes, for example. EVA foam is used as padding in equipment for various sports such as ski boots, bicycle saddles, hockey pads, boxing and mixed-martial-arts gloves and helmets, wakeboard boots, waterski boots, fishing rods, and fishing-reel handles. The polymer does not biodegrade within the body, but is quite inert and causes little or no reaction following implantation.ĮVA is one of the materials popularly known as expanded rubber or foam rubber. These devices are used in drug delivery research to slowly release a compound. The drug-filler-polymer mixture is then cast into a mold at −80 ☌ and freeze-dried until solid. Powdered drug and filler (typically an inert sugar) are added to the liquid solution and rapidly mixed to obtain a homogeneous mixture. ![]() The polymer is dissolved in an organic solvent (such as dichloromethane). ĮVA is also used in biomedical engineering applications as a drug-delivery device. Craft-foam sheets are made of EVA and are popularly used for children's foam stickers. EVA is also used as a clinginess-enhancing additive in plastic wraps. Hot-melt adhesives (such as hot glue sticks) and top-of-the-line soccer cleats are usually made from EVA, generally with additives like wax and resin. Yoga blocks are commonly made of EVA, as are some mats EVA has a distinctive vinegar-like odor and is competitive with rubber and vinyl polymer products in many electrical applications. The material has good clarity and gloss, low-temperature toughness, stress-crack resistance, hot-melt adhesive waterproof properties, and resistance to UV radiation. ĮVA is an elastomeric polymer that produces materials which are "rubber-like" in softness and flexibility. The EVA copolymer which is based on a high proportion of VA (greater than 60%) is referred to as ethylene-vinyl acetate rubber. The materials with approximately 11% VA are used as hot-melt adhesives. Both filled and unfilled EVA materials have good low temperature properties and are tough. It is not vulcanized but has some of the properties of a rubber or of plasticized polyvinyl chloride particularly at the higher end of the range. ![]() The EVA copolymer, which is based on a medium proportion of VA (approximately 4 to 30%), is referred to as thermoplastic ethylene-vinyl acetate copolymer and is a thermoplastic elastomer material. The material is generally considered non-toxic. It has some of the properties of a low-density polyethylene but increased gloss (useful for film), softness and flexibility. It is a copolymer and is processed as a thermoplastic material – just like low-density polyethylene. The EVA copolymer which is based on a low proportion of VA (approximately up to 4%) may be referred to as vinyl acetate modified polyethylene. There are three different types of EVA copolymer, which differ in the vinyl acetate (VA) content and the way the materials are used. The weight percent of vinyl acetate usually varies from 10 to 40%, with the remainder being ethylene. Chemical compound a close-up picture of open-celled EVA EVA polymer "milk"Įthylene-vinyl acetate ( EVA), also known as poly(ethylene-vinyl acetate) ( PEVA), is a copolymer of ethylene and vinyl acetate. ![]()
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