Problem & Solution

Practical answers to common plastic material challenges

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PP Extrusion Melt Fracture

Exit roughness: raise temperature, reduce speed, apply PPA.

Extrusion & Post PP;extrusion;melt fracture;sharkskin;PPA

PP Regrind-Induced Embrittlement

Material Drying PP;regrind;embrittlement;degradation;molecular weight;melt index

PP '2079851475616104452 Black Speck

Black speck control relies on normalized dead-spot cleaning.

Injection Molding PP;black speck;carbonization;dead spot;purging

PP Glass Fiber Floating Fiber

Injection Molding PP;glass fiber;floating fiber;coverage;melt temperature;mold temperature

PP Glass Fiber Reinforced Warpage

Orientation warpage is broken through from gate design.

Molds & Tooling PP;glass fiber;warpage;orientation;gate

PP Part Uneven Gloss

Molds & Tooling PP;uneven gloss;mold temperature;water circuit;crystallization;cooling

PP Mold Sticking

For mold sticking, reduce pressure first, then fix draft and polishing.

Molds & Tooling PP;mold sticking;holding pressure;draft angle;polishing

PP Ejector Whitening and Cracking

Molds & Tooling PP;ejector whitening;ejection cracking;gripping force;ejection;cooling

PP Part Internal Bubble

Material Drying PP;bubble;vacuum bubble;holding pressure;regrind;venting

PP Trapped Gas Burning

Injection Molding PP;trapped gas;burnt;diesel effect;vent groove;short shot method

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