Problem & Solution

Practical answers to common plastic material challenges

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PU hydrolytic aging

Material Analysis PU hydrolytic aging polar groups anti-hydrolysis stabilizer waterproof coating

Heavy smoke in PU processing

Heavy smoke is caused by volatiles evaporation; temperature reduction and exhaust are key

Material Analysis PU processing smoke volatiles exhaust system temperature reduction

Insufficient toughness of PU, brittle fracture

Material Analysis PU insufficient toughness molecular weight crosslinking control crystallization refinement

Poor chemical resistance of PU

Material Analysis PU chemical resistance chemical attack slight crosslinking surface coating

Strong odor in PU processing

Material Analysis PU processing odor volatiles ventilation and exhaust temperature control

Large creep deformation of PU

Large creep is caused by elastomer nature; slight crosslinking and rigid filler are key

Material Analysis PU creep slight crosslinking high molecular weight rigid filler

Insufficient tensile strength of PU

Material Analysis PU tensile strength molecular weight coupling agent orientation control

Bubbles in PU elastomer casting

PU casting bubbles are caused by insufficient degassing; vacuum degassing is key

Material Analysis PU casting bubbles vacuum degassing casting temperature mixing degassing

Low elongation at break of PU

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

PU hardness too high

Material Analysis PU high hardness crystallinity filler amount plasticizer

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