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How can raw material degradation, yellowing, and black spots be prevented during PVC sheet production?
Category: Industry News
Release Date: 2026-03-17
Summary: ① Select qualified heat stabilizers and add them precisely according to the formula to avoid insufficient stabilizers; ② Strictly control the temperatures at each stage to prevent local overheating (the decomposition temperature of PVC is approximately 180℃); ③ Ensure that the gap between the screw and the barrel is reasonable to avoid material stagnation; ④ Dry the raw materials in advance to remove moisture and prevent hydrolysis and decomposition; ⑤ Regularly clean the molds and screws to avoid carbonization of accumulated materials.
① Use qualified heat stabilizers and add them precisely according to the formulation to prevent insufficient dosage; ② Strictly control the temperature at each stage to avoid localized overheating (the decomposition temperature of PVC is approximately 180°C); ③ Ensure that the clearance between the screw and the barrel is appropriate to prevent material滞留; ④ Pre-dry the raw materials to remove moisture and thereby prevent hydrolytic degradation; ⑤ Regularly clean the mold and the screw to prevent buildup and carbonization.
Keywords: How can raw material degradation, yellowing, and black spots be prevented during PVC sheet production?
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2026.03.17
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