C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 8/06 (2006.01) B28B 15/00 (2006.01) B29B 13/00 (2006.01) B29C 47/00 (2006.01) C08J 3/14 (2006.01) C08J 5/18 (2006.01)
Patent
CA 2577302
Methods of tailoring polyethylenes are contemplated utilizing 0.5 to 70 volume percent oxygen containing gases. The tailoring occurs in a melt-conveying zone of a mixer/extruder, and not in the feed or melting zones of a mixer/extruder. The effect of tailoring is to decrease the haze and/or increase the gloss of blown films made from the tailored polyethylenes compared to similar polyethylenes that are extruded/mixed in the substantial absence of oxygen or oxygen containing gases.
L'invention concerne des procédés de traitement de polyéthylènes au moyen de 0,5 à 70 % en volume de gaz contenant de l'oxygène. Le traitement est effectué dans une zone de transport de fusion d'un mélangeur/extrudeur et non dans les zones d'alimentation ou de fusion d'un mélangeur/extrudeur. Le traitement a pour effet de réduire le voile et/ou augmenter la brillance de films soufflés composés des polyéthylènes traités par rapport à des polyéthylènes similaires extrudés/mélangés en l'absence d'oxygène ou de gaz contenant de l'oxygène.
Li Dongming
Lue Ching-Tai
Borden Ladner Gervais Llp
Univation Technologies Llc
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