{"id":16634,"date":"2025-11-25T09:37:15","date_gmt":"2025-11-25T08:37:15","guid":{"rendered":"https:\/\/www.energycle.com\/?p=16634"},"modified":"2026-10-15T10:43:24","modified_gmt":"2026-10-15T02:43:24","slug":"come-riciclare-la-schiuma-eva","status":"publish","type":"post","link":"https:\/\/www.energycle.com\/it\/come-riciclare-la-schiuma-eva\/","title":{"rendered":"Come riciclare la schiuma EVA"},"content":{"rendered":"

EVA foam can be recycled, but the route depends on whether the material is thermoplastic or crosslinked, how it was formulated, and what contamination or bonded layers are present. Clean footwear offcuts are a different feedstock from used floor mats, laminated packaging or cured photovoltaic encapsulant.<\/p>\n\n

The most dependable projects begin with segregated production scrap and a defined buyer. Shredding reduces size; it does not by itself restore EVA to virgin properties.<\/p>\n\n\n

\"Can
Segregated post-industrial EVA foam scrap and shoe sole cut-offs ready for mechanical recycling.<\/figcaption><\/figure>\n\n\n

What EVA material are you processing?<\/h2>\n\n

EVA is an ethylene-vinyl acetate copolymer available in many grades. Vinyl-acetate content, additives, fillers, pigments, blowing agents and crosslinking change softness, melt behavior and end use. Foam may be chemically or physically crosslinked so that it no longer melts and flows like an uncrosslinked thermoplastic grade.<\/p>\n\n

Feedstock<\/th>Main issue<\/th>Possible route<\/th><\/tr><\/thead>
Clean uncrosslinked EVA production scrap<\/td>Keep grade and formulation traceable<\/td>Size reduction and qualified melt reprocessing<\/td><\/tr>
Crosslinked footwear foam offcuts<\/td>Does not simply remelt into equivalent foam<\/td>Grinding into controlled powder or crumb for a validated formulation<\/td><\/tr>
Post-consumer EVA products<\/td>Dirt, mixed polymers, adhesives and unknown additives<\/td>Sorting, cleaning and application-specific qualification<\/td><\/tr>
Solar-module encapsulant<\/td>Bonded to glass, cells, backsheets and other layers; often crosslinked<\/td>Specialized module dismantling and recovery process<\/td><\/tr><\/tbody><\/table><\/figure>\n\n

Ask for material safety data, formulation information and process history where possible. An \u201cEVA\u201d label alone is not a complete recycling specification.<\/p>\n\n

Route 1: grind clean crosslinked EVA foam<\/h2>\n\n

Crosslinked EVA footwear or molding scrap is commonly evaluated as a ground ingredient rather than as a direct replacement for virgin pellets.<\/p>\n\n

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  1. Segregate.<\/strong> Separate formulations, colors, fabric, rubber, PU, metals and adhesives.<\/li>\n
  2. Pre-cut or shred.<\/strong> Reduce blocks, sheets and offcuts to a controlled size for the next machine.<\/li>\n
  3. Granulate or pulverize.<\/strong> Produce crumb or powder to the particle-size range required by the receiving formulation.<\/li>\n
  4. Classify.<\/strong> Screen the output and manage dust and oversize material.<\/li>\n
  5. Trial the formulation.<\/strong> Blend a measured amount into a product recipe and test processing, density, cell structure and required performance.<\/li>\n<\/ol>\n\n

    There is no universal recycled-powder percentage that preserves shoe-sole or foam quality. The acceptable addition depends on particle size, surface chemistry, crosslink density, filler, color and the target product.<\/p>\n\n

    Route 2: reprocess suitable thermoplastic EVA<\/h2>\n\n

    Clean, uncrosslinked EVA scrap may be granulated and evaluated for extrusion or compounding. The line may include controlled feeding, melting, venting, filtration and pellet cutting. Temperature, shear and residence time must match the actual grade because EVA formulations can degrade, crosslink further or release volatiles when processed incorrectly.<\/p>\n\n

    A dedicated EVA foam pelletizing production line<\/a> (or compatible plastic pelletizing system<\/a>) should be selected only after a melt trial confirms that the feed can be reprocessed. Melt filtration can remove solid particles above its selected level, but not every odor, additive, dissolved contaminant or incompatible polymer.<\/p>\n\n\n

    \"High
    Uniform, dense recycled EVA pellets produced from uncrosslinked foam scrap.<\/figcaption><\/figure>\n\n\n

    Route 3: rebond or use as a composite ingredient<\/h2>\n\n

    Some EVA crumb can be bonded or incorporated into mats, underlays, cushioning, molded components or other composites. This is an end-product formulation process rather than simple mechanical recycling. The manufacturer must validate bonding, emissions, durability, compression set, odor, migration and any applicable product standards.<\/p>\n\n

    Why post-consumer EVA is harder<\/h2>\n\n