Problem & Solution

Practical answers to common plastic material challenges

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Poor chemical stress cracking resistance of products

Molding Process chemical resistancestress crackingchemical resistanceannealinginternal stress

Uneven bubbles in gas-assisted injection molded products

Gas-assisted molding requires precise control of the interaction between gas and melt

Injection Molding gas-assisted moldingbubblesgas penetrationgas channel designmold flow analysis

Center porosity of large parts

Gate layout and sequential injection design of large parts are the key to success

Molds & Tooling porositylarge partsshrinkage compensation distancesequential valvegate layout

Color change at product weld lines

Weld line color change is especially obvious in high-gloss products

Molding Process weld linecolor differencecolorantmolecular orientationlocal overheating

Large batch differences in melt index of blends

Material Analysis melt indexbatch stabilitymolecular weightrecycled material proportiongranulation

Products becoming brittle at low temperature

Production & Quality low-temperature embrittlementembrittlement temperatureTgtougheningstress concentrationlow temperature

Tiger skin patterns on product surface

Tiger skin patterns are a macroscopic manifestation of flow instability

Injection Molding tiger skin patternelastic turbulenceinjection speed curvegate design

Ejector whitening/ejector deformation of products

Molds & Tooling ejector whiteningejector bulgingdraft angleejector pinrelease agent

Deposits on mold cavity surface

Mold deposits affect product surface quality and mold maintenance cycle

Molds & Tooling mold depositlow-molecular substancesrelease agentmold maintenancecleaning cycle

Brittle fracture of products

Material Analysis brittlenesselongationdegradationphase inversionmatrix continuityfiller content

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