B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
B65D 65/38 (2006.01) A22C 13/00 (2006.01) B29C 55/26 (2006.01) C08J 5/18 (2006.01)
Patent
CA 2205620
A tubular film for encasing food. The tubular film comprises a material which has been regenerated from a viscose solution. The tubular material is longitudinally stretched by from +8 to +40 percent and transversely stretched by from -20 to +40 percent while wet and the stretch is maintained during drying, said transverse stretch and longitudinal stretch being sufficient to obtain a surface area increase of at least 10 percent from the point of regeneration. In general, the tubular material has a wall thickness of from about 60 to about 90 percent of the same tubular material except without the combined stretch. The invention also includes the method for making the tubular material by stretching the regenerated tubular material while wet and maintaining the stretch during drying.
Pellicule tubulaire servant à envelopper la nourriture. La pellicule tubulaire est faite d'un matériau qui a été régénéré à partir d'une solution de viscose. Le matériau tubulaire mouillé est étiré longitudinalement de +8 à +40 pour cent et transversalement de -20 à +40 pour cent; l'étirement est maintenu pendant le séchage. Les étirements transversal et longitudinal susmentionnés sont suffisants pour obtenir un agrandissement de surface d'au moins 10 pour cent comparativement au point de régénération. En général, le matériau tubulaire présente une épaisseur de paroi de 60 à 90 pour cent environ du même matériau tubulaire sauf sans l'étirement combiné. L'invention concerne également la méthode de fabrication du matériau tubulaire en étirant le matériau tubulaire régénéré lorsque ce dernier est mouillé et en maintenant l'étirement pendant le séchage.
Pohl David
Van Der Bleek Mark
Devro-Teepak Inc.
Gowling Lafleur Henderson Llp
LandOfFree
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