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Problema y solución

Respuestas prácticas a los desafíos comunes de los materiales plásticos

11636 preguntas
Q
Unsatisfactory toughening effect of modified cellulose acetate butyrate
A
Toughening effect needs to be addressed from addition amount, compatibility and dispersion
Material Analysis tougheningimpact strengthcompatibilitydispersion
Q
White streaks or whitened areas appear at stressed or bent parts of the product
A
Whitening is caused by excessive residual stress; stress needs to be reduced
Extrusion & Post whiteningstress whiteningresidual stressannealing
Q
Irregular deformation of the product after demolding
Q
Linear marks appear around multiple gates or holes of the product
A
Weld lines require increasing confluence temperature, improving venting and optimizing gates
Injection Molding weld linepoor fusioninjection speedventing
Q
Glass fiber PA requires special process parameters to avoid floating fiber and property fluctuation
A
Glass fiber PA requires medium speed and high mold temperature
Injection Molding glass fiber PAinjection speedfloating fibermold temperature
Q
Front zone temperature directly affects the temperature and flowability of the melt entering the cavity
A
Front zone temperature needs stable control near the recommended upper limit
Injection Molding front zone temperaturemelt temperaturethermal stability
Q
Obvious depressions at thick-wall areas of the product (rib roots, back of bosses)
Q
Plastic cracking around metal inserts is a common problem
A
Insert molding requires preheating and increasing surrounding wall thickness
Material Drying insertshrinkage differencepreheatingwall thicknessPA
Q
Product dimensions out of tolerance range
A
Dimension out of tolerance requires stable process conditions and moisture control
Material Drying dimension out of toleranceshrinkagemoistureprocess stability
Q
Product shows multiple defects (silver streaks, burnt, short shot, etc.)
A
Barrel temperature needs to be stably set according to the material recommended range
Processing Machinery barrel temperaturetemperature controlplasticizationcellulose acetate butyrate
ChemAI