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What are EVA foams, and how are they used?

Views: 379     Author: zhongle     Publish Time: 2023-04-18      Origin: Site


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What are EVA foams, and how are they used?

EVA foam is an acronym for closed-cell ethylene-vinyl acetate copolymer foam that is utilized as an excellent substitute for several industrial materials. Natural rubber, vinyl, neoprene, polyurethane, PVC foams, wood composites, felt, fiberglass, and mineral wool can all be replaced with it. The EVA foam material is distinguished by its high gloss and clarity, its ability to remain strong at low temperatures, its resistance to UV radiation and stress-cracking, and its hot-melt adhesive's waterproof qualities.

The advantages of utilizing an EVA foam alternative in production are comparable to those of conventionally used materials. There are various advantages here:

Vibration and impact absorptions,

Weather and chemical, oil, and fuel spill/splash resistances,

Thermal insulation and acoustical properties, and

Resilience, buoyancy, and low water absorption.

Common Uses

Because EVA foam has a fine, homogenous cell structure, it can be processed similarly to other thermoplastics. Polypropylene maintains flexibility and resilience, recovers rapidly from compression, and absorbs colors. Typically, the foam is created in a mold, resulting in a sheet of closed-cell foam ("a bun"). The size of the bun varies depending on the density of the foam. According to the specifications, the bun is sliced into sheets or fashioned into a certain form or item.

EVA foam is incredibly adaptable, with several uses and applications that most of us take for granted. EVA foam can be found in a wide range of applications, including automotive, construction, maritime, electronics, healthcare, packaging, sports, leisure, recreation, and footwear. As an example:

1. EVA is competitively used in place of rubber and vinyl products in many electrical applications.

2. EVA is used to give plastic wrap its “clinginess.”

3. EVA emulsions are developed into adhesives used in packaging, bookbinding, bonding plastic films, coating metal surfaces, and coating papers.

4. EVA is used with wax and resin additives to make hot-melt adhesives, hot glue sticks, and top-notch soccer cleats.

5. EVA craft foam sheets are used to make children’s foam stickers.

EVA is additionally applied in biomedical drug delivery to gradually release a substance inside the body. The polymer is dissolved in an organic solvent, mixed thoroughly, and then shaped into a solid that has been freeze-dried. It is inert and has no negative effects, even though it does not biodegrade when it is inside the body.

EVA, often known as expanded or foam rubber, is used to cushion sporting goods. EVA foam is used in the manufacture of fishing rods and reels, bicycle saddles, hockey pads, boxing gloves and helmets, snow and water ski boots, and bicycle saddles.

EVA is used in athletic footwear to absorb impact shock. It is a popular material for slippers and sandals because it conforms to the foot, is lightweight, does not retain odors, and has a glossy finish. EVA is a much more cost-effective material than natural rubber.

EVA is a buoyant material that is used in fishing and water sports equipment, as well as non-traditional items such as floating eyewear. It is used as a cork substitute for fishing rod handle butt-ends.

Other applications include, but are not limited to:

1. Encapsulation material for crystalline silicon solar cells (for photovoltaic modules),

2. A cold-flow improver for diesel fuel,

3. HEPA filter separators,

4. Thermoplastic (sports) mouth guards (that soften in boiling water for a custom fit), and

5. Nicotine transdermal patches.

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