Recycling of polypropylene is made more difficult by the presence of various colorants and nucleators in mixed batches of reclaim, which can affect shrinkage and warpage.

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Recycling of polypropylene is made more difficult by the presence of various colorants and nucleators in mixed batches of reclaim, which can affect shrinkage and warpage. Milliken Chemical, Spartanburg, S.C., says this problem can be solved by adding a high-performance nucleant to “level out” the different recycle streams. Milliken’s latest Hyperform HPN-68L “hyper-nucleating” agent reportedly imparts the highest Tc (peak crystallization temperature) of any PP nucleating agent. When added to recycled PP, it raises the Tc to a consistent level, allowing for faster and more consistent processing. Hyperform also promotes isotropic shrinkage, which helps reduce warpage. (800) 354-0372 • www.millikenchemical.com

Milliken Chemical
920 Milliken Road M-400 Spartanburg, SC 29304
Phone (864) 503-2772 Fax (864) 503-2430