Eva Plastic Granules

EVA plastic granules, or ethylene-vinyl acetate copolymer granules, are thermoplastic polymer granular materials synthesized by the copolymerization of two monomers: ethylene and vinyl acetate.
EVA plastic granules can be classified into many kinds of items according to different standards. Common examples include FDA Compliant EVA , REACH Compliant EVA, RoHS Compliant EVA, LFGB Compliant EVA, ISO 9001 EVA, ISO 10993 (medical-grade) EVA, UL94 Flame Retardant Certification (V-0/V-2) EVA, Non-Toxic Certification EVA, Low VOC EVA, BPA-Free EVA, GRS Certification (recycled EVA), Food-Contact Approval EVA, Skin-Contact Safety Certification EVA.
 

EVA (ethylene-vinyl acetate) plastic granules are versatile thermoplastic copolymers, with pros and cons tied to vinyl acetate (VA) content.

Performance is adjustable via VA content-low VA (5%–10%) offers rigidity and heat resistance like PE; high VA (20%–40%) provides flexibility, toughness and adhesion similar to rubber. It supports diverse processing (injection molding, extrusion, foaming, blow molding) for mass production, and has excellent low-temperature resistance, remaining flexible at -50°C without brittleness. Food/ medical-grade EVA is non-toxic, BPA-free and safe for food packaging, toys and medical devices. It resists weak acids, alkalis and most solvents, with good aging resistance, and high-VA EVA bonds well with metals, fabrics and plastics for adhesives.

    Below is the introduction to the parameters, functions and practical processing technology of EVA

VA plastic granules are made from ethylene vinyl acetate copolymer. They come with typical VA content of 14%, 18%, 28% and 40%. The melt index (MI) tested at 190℃/2.16kg ranges from 2.5 to 52 g/10min. Density is between 0.92 and 0.98 g/cm³. Melting point is 47–89℃, and Vicat softening point is 50–70℃. Brittle temperature can reach as low as -60 to -76℃. Tensile strength is 10–20 MPa, with elongation at break of 200–700%. Hardness is Shore A 60–90, and flammability meets UL94 HB standard.

Processing requirements:Dry at 70–80℃ for 1–2 hours before production.Recommended injection temperature: 160–200℃.Mold temperature: 20–45℃.

                I'd like to share the story of our cooperation with a well-known footwear brand

About 10 years ago, this famous shoe company was facing challenges with material performance and processing efficiency during sole production. They kept looking for suitable raw materials and improving their production process, but the results were still far from satisfactory.

When we met this footwear enterprise, we hit it off right away because we shared the same business philosophy.

Our EVA materials successfully helped the company achieve a double breakthrough in both product performance and production efficiency.

As we all know, the soul of a pair of shoes lies in the quality of the sole. As the core material for shoe soles, EVA directly determines the user's wearing experience. During our cooperation, we gave up the standardized supply model. Our technical team went deep into the customer's production line and worked with their R&D department to identify the bottlenecks of their original materials, including uneven foaming, unstable processing, and poor rebound durability.

Before this cooperation, we had already conducted research and tests on the foaming uniformity, processing stability, and rebound durability of EVA pellets. After partnering with the footwear brand, we accelerated our R&D process. By precisely adjusting VA content and molecular structure, and applying a special foaming additive system, we quickly provided a customized high-performance EVA pellet solution.

Thanks to our efforts, we helped the shoe factory improve in three key areas:

Better product performance: Our new material forms a uniform and dense cell structure, which significantly improves cushioning, rebound, and deformation resistance, making shoes more comfortable to wear.

Higher production efficiency: Excellent processing stability broadens the process window, making the production line run more smoothly, reducing defect rates and increasing output.

Consistent quality: Our strict full-process quality control ensures stable batch performance of EVA pellets, supporting stable and consistent production for the shoe factory.

The upgrade of EVA materials has greatly lifted the brand's product competitiveness. Its related product lines have gained better feedback in the high-performance sports and high-end leisure markets.

After nearly a decade of cooperation, our partnership has grown from a single material supply to a full-range strategic cooperation, covering the R&D of multi-series modified EVA materials, process optimization, and forward-looking technology exploration. We do not only provide materials; we provide total solutions that cover the entire product lifecycle while balancing performance and sustainability.

At Suzhou Plenty Plastic Co., Ltd., we are committed to driving manufacturing upgrading through material science. We look forward to becoming a trusted innovation partner for more customers and helping you develop best-selling footwear with our professional EVA technology.

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