Overview
High hardness EVA is a specialized form of Ethylene-Vinyl Acetate copolymer engineered for superior structural integrity. Unlike standard EVA, it incorporates cross-linking agents or higher vinyl acetate (VA) content to achieve Shore C/D hardness ratings above 60, making it ideal for load-bearing applications. Its versatility stems from adjustable properties like density and elasticity, tailored through polymerization techniques. Commonly produced as sheets, pellets, or molded parts, it bridges the gap between rubber and plastic in performance.
Physical and Chemical Properties
High hardness EVA exhibits a density range of 0.95–1.20 g/cm³, with thermal stability up to 100°C. Its closed-cell structure provides low water absorption (<1%) and resistance to oils, acids, and alkalis, ensuring longevity in harsh environments. The material’s mechanical strength is characterized by compressive resistance (5–20 MPa) and elongation at break (200–600%). UV stabilizers are often added for outdoor use, while antistatic variants cater to electronics applications.
Main Applications
Footwear manufacturers rely on high hardness EVA for midsoles in safety boots and athletic shoes, where durability meets lightweight cushioning. Industrial uses include vibration-damping pads for machinery and protective linings in automotive interiors. In sports, it forms the core of skateboard decks and martial arts mats. Emerging applications include 3D printing filaments and renewable energy component mounts due to its recyclability.
Safety and Storage
High hardness EVA is classified as non-hazardous but requires standard polymer handling precautions. Dust generation during cutting or milling may irritate respiratory systems; PPE like masks is recommended. Storage should avoid temperatures exceeding 40°C to prevent deformation. Bulk shipments typically use moisture-proof packaging to maintain material integrity before processing.
B2B Procurement Guide
Buyers should specify hardness (Shore scale), VA content (typically 15–30%), and additives (e.g., flame retardants). MOQs for industrial-grade EVA start at 1 ton, with pricing tiers for volume orders. Quality certifications like ISO 9001 and RoHS compliance are critical for EU markets. Lead times vary from 2–6 weeks; sample testing is advised to confirm mechanical properties match technical datasheets.
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