문제 및 해결책

일반적인 플라스틱 재료 문제에 대한 실질적인 답변

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EVA foam cells are uneven

Cell uniformity depends on blowing agent dispersion and crosslinking uniformity

Material Drying EVA foam uneven cells blowing agent masterbatch crosslinking uniformity mold temperature control

EVA product elliptical deformation

Elliptical deformation is caused by asymmetric demolding force; uniform ejection is key

Molds & Tooling EVA elliptical deformation symmetric ejection uniform cooling shaping time

EVA internal delamination cracking

Extrusion & Post EVA internal delamination interfacial adhesion compatibilizer uniform cooling

EVA surface snakeskin pattern

Extrusion & Post EVA snakeskin pattern extrusion temperature elastic recovery die temperature control

EVA internal black specks carbonization

Processing Machinery EVA internal black specks thermal carbonization screw cleaning temperature control

EVA product twist deformation

Twist deformation is caused by asymmetric cooling; symmetric cooling is key

Molds & Tooling EVA twist deformation symmetric cooling gate arrangement annealing

EVA foam open cell content is high

Molding Process EVA foam open cell content cell wall rupture crosslinking degree foaming temperature

EVA flexural modulus is low

Material Analysis EVA flexural modulus rigid filler nucleating agent crystallinity

EVA surface periodic corrugations

Corrugations are caused by unstable injection; equipment overhaul and PID control are key

Injection Molding EVA surface corrugation injection stability equipment overhaul PID control

EVA film heat-seal strength is insufficient

Insufficient EVA heat sealing requires increasing temperature, time, and pressure

Molding Process EVA film heat-seal strength heat-sealing temperature sealing time pressure

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