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EVA is a 100% solid, transparent, flexible Ethylene Vinyl-Acetate copolymer. It is normally categorized by percent Vinyl-Acetate(VA) content and melt flow rate (MFR) or melt index (MI). Most commonly used EVAs contain between 19% and 28% VA.
In an EVA-based HMA formulation, a greater VA content can result higher transparency, more polar, extended flexibility, and better wettability to substrates. EVAs with more VA content will offer longer open time and slower set time.
EVA hot melt adhesives are processed in stick form with glue stick applicator guns, and they are often used in universal assembly bonding operations and also can be processed in granulate form in large packaging systems.
In diverse bonding applications, the optimal formulation must be developed specifically to the substrates to be bonded (polarity and surface roughness), application techniques (applicators, speed, and bonding temperature), and the end users’ servicing environment (temperature and humidity).
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| PACKAGING – LABELLING |
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| WOOD-FURNITURE |
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| AUTOMOTIVE |
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