المشاكل والحلول

إجابات عملية على التحديات الشائعة في مواد البلاستيك

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EVOH Hardness Too High

Material Analysis EVOHhigh hardnesscrystallinityfiller amountplasticizer

Obvious EVOH Surface Color Difference

Injection Molding EVOHcolor differencecolor masterbatch dispersionpigment orientationtemperature stability

EVOH Surface Stress Whitening

Molding Process EVOHstress whiteningorientation stressannealingstress concentration

Fast EVOH Thermal Aging

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

Material Analysis EVOHthermal agingthermo-oxidationantioxidanthigh molecular weight

Insufficient EVOH Mixing

Insufficient mixing is caused by improper screw design; increasing mixing section is key

Processing Machinery EVOHinsufficient mixingscrew mixing sectionkneading blockside feeding

Poor EVOH Fatigue Resistance

Molds & Tooling EVOHfatigue resistancecrosslinking degreemolecular weightstress concentration

Low EVOH Elongation at Break

Material Analysis EVOHelongation at breakmolecular weightorientation controlcrosslinking degree

Large EVOH Compression Set

Molding Process EVOHcompression setcrosslinking degreeelastic recoveryreinforcing filler

EVOH Surface Orange Peel

Injection Molding EVOHorange peelmold temperatureholding pressuresurface solidification

EVOH Surface Blooming

Production & Quality EVOHbloominglow molecular migrationhigh molecular weightlubricant exudation

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