Polyurethane (PUR) Hot Melt Adhesives: Best Practices ...
2017-5-11 · About Polyurethane Polyurethane, or PUR, is a synthetic material made up of many organic units connected by urethane links. It is classified as a polymer because it has a molecular structure made up of similar units in a repeating chain. Invented in the 1930s, PUR was first used as a cheaper alternative to costly rubber during World War II. Over time, other PUR applications …
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