Problema y solución

Respuestas prácticas a los desafíos comunes de los materiales plásticos

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Large PVA dimensional change with temperature

Extrusion & Post PVAdimensional temperature sensitivitythermal expansion coefficientrigid fillerannealing treatment

PVA hardness too high

Material Analysis PVAhigh hardnesscrystallinityfiller amountplasticizer

PVA surface tiger-skin pattern

Injection Molding PVAtiger-skin patterninjection speedmulti-stage injectionmold temperature control

Low PVA elongation at break

Material Analysis PVAelongation at breakmolecular weightorientation controlcrosslinking degree

Large PVA compression set

Molding Process PVAcompression setcrosslinking degreeelastic recoveryreinforcing filler

PVA surface frosting precipitation

Production & Quality PVAfrostinglow molecular migrationhigh molecular weightlubricant precipitation

PVA surface stress whitening

Molding Process PVAstress whiteningorientation stressannealing treatmentstress concentration

Fast PVA thermal aging

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

Material Analysis PVAthermal agingthermal oxidationantioxidanthigh molecular weight

Insufficient PVA mixing

Processing Machinery PVAinsufficient mixingscrew mixing sectionkneading blockside feeding

Poor PVA fatigue resistance

Molds & Tooling PVAfatigue resistancecrosslinking degreemolecular weightstress concentration

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