Polymeric blends formed by solid state shear pulverization...

B - Operations – Transporting – 29 – B

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B29B 7/48 (2006.01) B29B 7/88 (2006.01) B29B 9/08 (2006.01)

Patent

CA 2417995

Solid state shear pulverization is utilized to form a compatibilized homogenous polymeric bland which has improved melt processing properties including a higher melt flow rate than the moldable base polymer without sacrificing, and often increasing the other physical properties including tensile strength, impact strength and elongation. The compatibilized, homogenous polymeric blend improves melt processing of the moldable polymer in injection molding, extrusion molding and blow molding, including the ability to down gauge blow molded films without sacrificing melt strength and the physical properties of the film.

L'invention concerne un procédé de pulvérisation par cisaillement à l'état solide utilisé pour former un mélange polymère homogène compatibilisé qui présente des propriétés améliorées de traitement par fusion, y compris un taux de fluidité plus élevé que le polymère de base moulable sans amoindrir voire, au contraire, en augmentant, ses autres propriétés physiques, parmi lesquelles la résistance à la traction, la résistance aux chocs, et l'étirement. Le mélange polymère susmentionné améliore le traitement par fusion du polymère moulable lors du moulage par injection, du moulage par extrusion et du moulage par soufflage; il peut également réduire les films calibrés moulés par soufflage sans altérer la résistance à la fusion et les propriétés physiques du film.

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