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New generation polymer processing additive for PP will improve productivity in Film and R ...
 

Fluoropolymer based polymer processing additive (PPA) has been used in LLDPE over a decade mainly to eliminate surface defects, remove die build-up and reduce gel formation. PPA, however could not find much usage in PP due to non-availabiity of suitable grade. A new product known as Dynamar FX 5911 X has been developed by Dyneon LLC, USA that is ideally suitable for PP. This new grade of PPA is undergoing major development work in applications such as cast film, BOPP and raffia tapes. These products are being manufactured at increased output without affecting their product quality. The new high performance PPA has a special role to play in this stricter demand of higher productivity with more demanding performance. The new PPA is designed for improved processibility of PP having lower MFR that is needed to generate higher strength and lower moisture permeation. For higher MFR PP, PPA allows processing at lower temperature and thereby improves stability of polymer. The new PPA additive is required to be used at 500 ppm level for reduction of die build-up and about 1000 ppm level for gel control and enhanced productivity. In BOPP, cigarette packaging film seems to have found greater usage of PPA. the improved surface finish of cigarette packaging with PPA is considered to be the key reason for it's acceptance. It seems that the major benefits for PP processors are derived from enhanced producitivity, lower rejections and reduction of machine downtime.

(Source : Modern Plastics International October 2000)
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