Molding Process
8 조회수
Rough surface of PET foamed sheet
문제 현상
The surface of PET foamed sheet is uneven, with orange peel texture or bumps.
원인 분석
Foaming gas escapes at the surface, forming pinholes or collapse; die temperature is improper; melt strength is insufficient and bubbles merge and rupture.
해결 방법
Control die temperature to appropriately cool the surface; increase melt strength (chain extender); control blowing agent dosage and dispersion.
핵심 요약
PET foamed sheet surface quality needs to be improved from melt strength and process parameters.
이 정보가 도움이 되었나요?
0 명이 도움이 되었다고 합니다
의견 주셔서 감사합니다!