PUR adhesives are reactive hot-melt adhesives based on polyurethane. They can be used to achieve high-strength bonds. Reactive polyurethane (PU) hotmelt adhesives are melted in a solid state (candles, granules) and applied to the bonding surface while hot. PUR adhesives are still soft after processing, then cure via a chemical reaction with the paper fibres and with moisture from the environment. PUR-based adhesives offer high heat resistance and high resistance to other chemicals. This results in an end product that is flexible in hot and cold conditions and extremely durable.
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