Extrusion & Post
8 조회수
Insufficient peel strength of PET extrusion coating
문제 현상
PET extrusion coating on other substrates (paper, aluminum foil) has insufficient peel strength and easily delaminates.
원인 분석
PET melt has poor adhesion to the substrate; the substrate surface is untreated or insufficiently treated; coating temperature is on the low side and wetting is insufficient.
해결 방법
Corona or flame treat the substrate to increase surface energy; increase coating temperature to improve wettability; increase laminating roller pressure.
핵심 요약
PET extrusion coating bonding requires dual guarantees of substrate surface treatment and process temperature.
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