Extrusion & Post
3 조회수
Uneven coating on PET film
문제 현상
Streaks, uneven thickness or pinholes appear when coating functional coatings on PET film.
원인 분석
Film surface tension is uneven (locally insufficient dyne value); the coating liquid wets the film poorly; environmental cleanliness is insufficient.
해결 방법
Ensure uniform corona treatment, all areas ≥42mN/m; optimize the coating liquid formulation to improve wettability; operate in a clean environment.
핵심 요약
PET film coating uniformity depends on surface treatment quality and coating process control.
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