Material Analysis
13 مشاهدة
PVC Profile Low Weld Corner Strength
ظاهرة المشكلة
After welding of door and window profiles, weld corner strength is insufficient, corners crack, and the whole window's air-tightness, water-tightness and safety are affected.
تحليل الأسباب
Poor plasticization degree, too high filler in formula or improper welding process (temperature/pressure/time) cause insufficient molecular entanglement at the welding interface; poorly plasticized profiles are 'congenitally deficient', no matter how good the welding is, the strength cannot be made up.
الحل
①Verify the gelation degree of the mixture, ensure plasticization; ②Optimize the three welding elements (temperature/pressure/time); ③Control filler and regrind proportion; ④Use formula materials with qualified strength; ⑤Regularly test weld corner strength.
الخلاصة الأساسية
PVC weld corner strength = 'plasticization quality + welding process': plasticization is the foundation, welding is the surface; poorly plasticized material cannot be welded firmly no matter what — ensure plasticization first, then talk about welding parameters.
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