Extrusion & Post
11 조회수
EVA and HDPE blend delamination
문제 현상
In EVA/HDPE cross-section, EVA concentrates in the inner layer
원인 분석
Large viscosity difference; low-viscosity EVA migrates toward the pipe wall
해결 방법
1) VA15-18% EVA with viscosity closer to HDPE; 2) Blending at 170-185°C to enhance compatibility; 3) EVA-g-MAH 1-2wt%
핵심 요약
EVA/HDPE delamination is driven by viscosity difference; viscosity matching and compatibilizer are key
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