Moisture in the granules.
This article offers manufacturers who process a broad range of plastics tips on how to handle polymers that are sensitive to moisture. It covers detection and drying procedures that will help ensure good-quality mouldings are produced.
Wilkinson
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DuPont (UK) Ltd, Hemel Hempstead.
Poppe
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Leidig
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Schirmer
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D004864:Equipment and Supplies; D005060:Europe; D010969:Plastics; D014867:Water
D010969:Plastics; D014867:Water