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المشاكل والحلول

إجابات عملية على التحديات الشائعة في مواد البلاستيك

2239 سؤال
Q
EVOH extrusion melt fracture
Q
EVA internal delamination cracking
A
Internal delamination is caused by poor interface and shrinkage differences; compatibilizer and uniform cooling are key
Extrusion & Post EVA internal delamination interfacial adhesion compatibilizer uniform cooling
Q
EVA surface snakeskin pattern
A
Snakeskin pattern is caused by low-temperature extrusion and elastic recovery; increasing temperature and reducing speed are key
Extrusion & Post EVA snakeskin pattern extrusion temperature elastic recovery die temperature control
Q
EVA film blocking is severe
Q
EVA and HDPE blend delamination
A
EVA/HDPE delamination is driven by viscosity difference; viscosity matching and compatibilizer are key
Extrusion & Post EVA/HDPE delamination viscosity difference VA content compatibilizer
Q
EVA dimensions change greatly with temperature
A
Dimensional temperature sensitivity is caused by large thermal expansion coefficient; adding filler and annealing are key
Extrusion & Post EVA dimensional temperature sensitivity thermal expansion coefficient rigid filler annealing treatment
Q
EVA surface pockmarks are dense
A
Pockmarks are caused by raw material impurities and mold damage; pure raw material and mold maintenance are key
Extrusion & Post EVA surface pockmarks impurity particles mold repair raw material purity
Q
EVA extruded film has gel particles
A
Gel particles are caused by insufficient melting; increasing temperature and mixing are key
Extrusion & Post EVA film gel particle melting temperature mixing section high molecular weight component
Q
EVA extruded film has transverse corrugations
A
Transverse corrugations are caused by traction vibration and roller eccentricity; equipment overhaul and stable control are key
Extrusion & Post EVA film transverse corrugation traction vibration cooling roller eccentricity pressure stabilizing device
Q
Frequent screen clogging in EVA extrusion
A
Screen clogging is caused by impurities and improper configuration; raw material control and stepped screens are key
Extrusion & Post EVA extrusion screen clogging gel particles stepped screens automatic screen change
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