EVA is the fourth largest ethylene series polymer after HDPE, LDPE and LLDPE. Compared to traditional materials, its cost is much lower. Many people think that EVA foam material is the perfect combination of hard shell and soft shell, retaining the advantages of soft and hard foam while abandoning the disadvantages. Also, the inherent flexibility in material design and manufacturing capabilities is also a major factor in some of the world’s leading companies and brands turning to EVA foam when high-quality, low-cost manufacturing materials are required.
Picture from: foamty
More than flexible, EVA foam material cares for our daily life and business activities, and has spawned the favor of end users. Footwear, pharmaceuticals, photovoltaic panels, sports and leisure products, toys, floor/yoga mats, packaging, medical equipment, protective gear, water sports products are in strong demand for durable plastic products, and the EVA foam material market segment continues to usher in new growth of.
EVA physical and mechanical properties
The properties of EVA copolymers are mainly determined by the vinyl acetate content and the degree of fluidity. The increase in VA content increases the density, transparency and flexibility of the material while reducing the melting point and hardness. Ethylene-vinyl acetate copolymer (EVA) is a very elastic material that can be sintered to form a foam similar to rubber, but with excellent strength. It is three times more flexible than low density polyethylene (LDPE), has a tensile elongation of 750%, and has a maximum melting temperature of 96°C.
Depending on the ingredients in the production process, different degrees of EVA hardness can be achieved. It is important to maintain a moderate level of hardness because EVA does not regain its shape after continuous compression. Compared to harder EVA, softer EVA is less resistant to abrasion and has a shorter lifespan in the sole, but is more comfortable.
Anti-static EVA foam not only has good anti-static buffering effect, but also has perfect pressure resistance.
Based on ESD EVA foam, there are many types: engraved foam boxes, foam inserts, PP box liners, conductive inserts, etc.,
For mobile phones, 3G terminals, computers, optoelectronic components, turnover boxes. Put the components of the notebook computer into the card slot made of foam cotton, and assemble the line together to improve the work efficiency. Used in motherboard and PCB workshops to avoid cutting electronic components and hands during use; LCD protection display and control circuits for LCD panel production lines.
Cut by sponge cutting machine
Post time: Sep-13-2022