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MAPP Plastics Discussion Forum

The MAPP Plastic Industry Discussion Forum allows members to rapidly communicate with each other. Post both questions and answers to questions that other MAPP members have about any industry topic from material and process issues to R&E Tax Credits and other business issues.

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Plastic Industry Forum - Converse with Plastics Processing Leaders / Materials / Processing PET injection molding grade and the sprue
Posted:  15 Nov 2017 18:26
We have more whitening, only around the sprue area of our part, when molding PET bottle grade virgin. The rest of the part looks great but the area of about 1-2" diameter around the single center sprue has blush/whiteness. I know PET has to cool quickly to stay clear and the water is at 50F so we have the cooling in line.

Any suggestions would be welcome from anyone who runs bottle grade PET. Thanks. 

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