stable and reliable polyurethane glue adhesive is used in ...
2 天前 · The ester-type polyurethane (PUR) foam is more stable, but both types tend to become sticky and brittle after a few years, losing their cushioning ability. They will also stain through contact. Foam gaskets made of PUR foam used to tightly seal storage cabinets or other enclosures should be monitored more closely after five …
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