Problema e solução

Respostas práticas para os desafios comuns dos materiais plásticos

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Large dimensional change of PU with temperature

Extrusion & Post PU dimensional temperature sensitivity thermal expansion coefficient rigid filler annealing treatment

Low elongation at break of PU

Material Analysis PU elongation at break molecular weight orientation control crosslinking degree

Large compression set of PU

Molding Process PU compression set crosslinking degree elastic recovery reinforcing filler

PU hardness too high

Material Analysis PU high hardness crystallinity filler amount plasticizer

Surface blooming of PU

Production & Quality PU blooming low molecular migration high molecular weight lubricant precipitation

PU angle deviation

Molds & Tooling PU angle deviation shrinkage compensation mold design full cooling

Surface stress whitening of PU

Molding Process PU stress whitening orientation stress annealing treatment stress concentration

Tiger skin pattern on PU surface

Injection Molding PU tiger skin pattern injection speed multi-stage injection mold temperature control

Fast thermal aging of PU

Thermal aging is caused by thermo-oxidation; improving the antioxidant system is key

Material Analysis PU thermal aging thermo-oxidation antioxidant high molecular weight

Insufficient PU mixing

Processing Machinery PU insufficient mixing screw mixing section kneading blocks side feeding

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