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PP

CommodityCrystallineHygroscopicity NoneVerified

Drying Conditions

Non-hygroscopic, pre-drying is generally not required.

Melt Temperature

200~250°C

⚠ Thermal degradation risk above 290°C

Minimize residence time and avoid exceeding this temperature.

Mold Temperature

20~60°C

Shrinkage

1~2.5%

Common Defects & First Checks

Warpage

PP: warpage is dominant (uneven crystallization).

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Sink Mark

PP: warpage is dominant (uneven crystallization).

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Flow Mark

PP: warpage is dominant (uneven crystallization).

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Field Notes

PP: warpage is dominant (uneven crystallization). High, anisotropic shrinkage with fiber. Mold temp uniformity is key to warpage control. Sink at thick sections.

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This data is a field-reference summary. Always verify against the resin manufacturer’s official TDS.

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