Problem & Solution

Practical answers to common plastic material challenges

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Plastic cracking around metal inserts is a common problem

Insert molding requires preheating and increasing surrounding wall thickness

Material Drying insertshrinkage differencepreheatingwall thicknessPA

Product dimensions out of tolerance range

Dimension out of tolerance requires stable process conditions and moisture control

Material Drying dimension out of toleranceshrinkagemoistureprocess stability

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

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 hydrolysis aging

Material Drying PVAhydrolysis agingpolar groupanti-hydrolysis stabilizerwaterproof coating

Silver streaks caused by moisture during PVA processing

Material Drying PVA injectionsilver streakmoisture dryingventingback pressure

Bubbles in thick-walled PVA '2079851475616104452

Material Drying PVA injection bubbles holding pressure thick-walled products mold venting

Internal voids of PU

Material Drying PU internal voids holding pressure mold venting raw '2079851475616104451

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