Nucleating agents

  • 04-Jan-2011 03:36 EST
Milliken Car Bumper photo high res.jpg

Milliken Chemical’s Hyperform HPN nucleating agents provide improvements in performance and processability of polypropylene (PP) grades intended for thermoforming as well as injection molding. According to the company, Hyperform HPN additives provide isotropic shrinkage in formed parts. HPN-20E, a grade of Hyperform HPN, is intended for a wide range of injection molding applications, such as large automotive parts. Unlike other nucleating agents that improve the stiffness of PP at the cost of reduced-impact properties, HPN-20E is said to have no negative effect on toughness. This additive can provide very good dimensional stability and low or zero warpage at much lower loadings than alternatives such as sodium benzoate and talc. HPN-20E also disperses very well in the high melt flow grades of PP favored for many thin-wall injection molding applications. The reduction in thermal expansion (CLTE) that it induces allows the production of zero-gap bumper fascias.

 

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