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Problem & Lösung

Praktische Antworten auf häufige Herausforderungen mit Kunststoffmaterialien

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382 Fragen
Q
EVOH Surface Blooming
A
Blooming is caused by low molecular migration and exudation; selecting high molecular weight grade is fundamental
Production & Quality EVOHbloominglow molecular migrationhigh molecular weightlubricant exudation
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Q
EVOH Stress Cracking
A
Stress cracking is caused by stress-accelerated chemical attack; annealing and high MW are key
Production & Quality EVOHstress crackingenvironmental stressannealinghigh molecular weight
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Q
EVOH Surface Microcracks
A
Microcracks are caused by excessive internal stress; annealing and crack-resistant design are key
Production & Quality EVOHmicrocrackinternal stressannealingstress concentration design
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Q
EVOH Performance Degradation After Repeated Processing
A
Performance degradation from multiple processing is caused by thermo-mechanical degradation; limiting regrind and supplementing antioxidant is key
Production & Quality EVOH recyclingperformance degradationantioxidant supplementationthermal degradationshear degradation
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Q
EVOH product yellowing after processing
A
Yellowing is caused by thermal-photo oxidation and metal catalysis; improving the antioxidant system and UV absorber is key
Production & Quality EVOH yellowing thermal oxidation antioxidant UV absorber metal catalysis
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Q
EVA internal inclusions
A
Inclusions are caused by raw material and environmental pollution; filtration and environmental control are key
Production & Quality EVA inclusions raw material filtration environmental cleanliness recycled material sorting
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Q
EVA surface blooming precipitation
A
Blooming is caused by low molecular migration and precipitation; selecting high molecular weight grades is fundamental
Production & Quality EVA blooming low molecular migration high molecular weight lubricant precipitation
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Q
EVA fatigue resistance is poor
A
Poor fatigue resistance is caused by insufficient recovery and fast crack propagation; increasing crosslinking is key
Production & Quality EVA fatigue resistance crosslinking degree molecular weight stress concentration
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Q
EVA surface microcracks
A
Microcracks are caused by excessive internal stress; annealing and crack-resistant design are key
Production & Quality EVA microcracks internal stress annealing treatment stress concentration design
2 Aufrufe
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Q
Performance decay of EVA with repeated processing
A
Performance decay from multiple processing is caused by thermo-mechanical degradation; limiting recycled material and supplementing antioxidant are key
Production & Quality EVA recycling performance decay antioxidant supplement thermal degradation shear degradation
2 Aufrufe
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