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Praktische Antworten auf häufige Herausforderungen mit Kunststoffmaterialien

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Product shows silver streaks, bubbles or decreased mechanical properties

Drying requires strict control of conditions according to material characteristics

Material Drying dryingmoisture contentdew pointcellulose acetate butyrate

Extremely narrow temperature window in CAB processing

CAB requires precise temperature control and drying within a narrow processing window

Material Drying CABprocessing windowthermal stabilityprecise temperature control

Silvery white streaks appear on the product surface along the melt flow direction

Material Drying silver streaksplaydryingthermal degradationventing

PVA product elliptical deformation

Molds & Tooling PVAelliptical deformationsymmetric ejectionuniform coolingsetting time

PVA internal delamination cracking

Extrusion & Post PVAinternal delaminationinterfacial bondingcompatibilizeruniform cooling

PVA surface snakeskin pattern

Extrusion & Post PVAsnakeskin patternextrusion temperatureelastic recoverydie temperature control

Severe moisture absorption of PVA raw material before extrusion

PVA is strongly polar and hydrophilic and must be fully dried before processing

Material Drying PVA moisture absorptionvacuum dryingsealed packagingmoisture controlpolar hydrophilicity

PVA internal black speck carbonization

Processing Machinery PVAinternal black speckthermal carbonizationscrew cleaningtemperature control

PVA product twist deformation

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

Molds & Tooling PVAtwist deformationsymmetric coolinggate arrangementannealing

Low PVA flexural modulus

Material Analysis PVAflexural modulusrigid fillernucleating agentcrystallinity

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