In polypropylene (PP) injection molding, cracking issues are usually caused by insufficient impact strength, internal stress concentration, or poor formulation balance—especially when high filler content or improper mineral selection is used.

Common causes of PP cracking:

✔ Excess internal stress during molding

✔ Poor compatibility between resin and filler

✔ Low impact resistance of base PP material

✔ Improper cooling or processing conditions

✔ Incorrect use of mineral fillers

How to improve performance: Using properly treated talc powder in PP modification can help improve stiffness balance, reduce shrinkage stress, and enhance dimensional stability—helping to reduce cracking risk in finished parts.

We provide high-quality talc powder solutions for PP injection molding, helping improve stability and production efficiency.

Free samples available for testing.

WhatsApp: +86-18350592277

Website: www.xufengtalc.com