What Is EVA Hot Melt Adhensive? And The Difference Between EVA And PUR Adhensive?

Today, We Will Talk About What EVA Hot Melt Adhensive Is, And The Difference Between PUR Hot-Melt Adhensive And EVA Hot Melt Adhensive.

What is EVA hot melt adhensive, PO hot-melt adhensive and PUR hot-melt adhensive?

       EVA hot melt adhesives are based on Ethyl-Vinyl Acetate (EVA), PO hot-melt adhesives are based on Polyolefin, and PUR hot-melt adhesives are based on polyurethane reactive technology.

        Edgebanding using EVA hot melt is commonly used due to ease of use, but PUR is gaining ground rapidly, thanks to its exceptional benefits. If joints need to be water or heat resistant (fire doors or kitchen cabinets) then PUR adhesive is recommended, as it has a significantly higher water and heat resistance than an EVA adhesive.

EVA hot-melt adhesives are classed as filled and unfilled adhesives. Filled glues are generally lower cost, and in addition to the adhesive resins, contain fillers such as chalk, which can, at low speeds, help prevent stringing. 

 Are PUR adhesive easy to use? 

With PUR hot-melt adhesives, the user can achieve a thinner glue line, high final bond strength and produce tight joints, at the same time as having excellent heat and water resistance, and all while running clean.

Not all edgebanders are equipped to run PUR adhesives (always check with the machine supplier for suitability).  What is very important when using PUR adhesives is to purge the adhesive melt tank and applicator (nozzle/roller) after use with a suitable cleaning agent – unlike EVA adhesives, PUR adhesives, once cured, will not re-melt.

This year has seen a major push toward PUR MicroEmissions, which offer the proven bonding performance of traditional PUR adhesives with reduced health and safety concerns.  PUR MicroE-missions (ME) contain less than 0.1% isocyanate monomer and reduce isocyanate vapours by up to -90%.

So as difference performances for PUR and EVA hot melt adhensive, people select suitable edge banding machine as their requirments accordingly.