Extrusion & Post 10 조회수

Weak Interfacial Adhesion in EVOH Coextrusion

문제 현상

EVOH/PE coextrusion interface adhesion <1N/15mm with delamination

원인 분석

EVOH is highly polar while PE is non-polar, interfacial adhesion is extremely low; no tie layer used

해결 방법

1) Set a tie layer between EVOH and PE (PE-g-MAH or EAA 5-10μm); 2) Coextrusion temperature ensuring full diffusion of the tie layer; 3) Increase tie layer thickness to 8-15μm

핵심 요약

EVOH/PE interface polarity difference is large; a tie layer must be used to solve it

EVOH/PE coextrusiontie layerPE-g-MAHinterfacial polarity differenceEAA tie layer

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Weak Interfacial Adhesion in EVOH Coextrusion

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