Orientation of films to improve barrier and uv stability

Details Orientation of films to improve barrier and uv stability Orientation of films to improve barrier and uv stability

B - Operations, Transporting

29

C

B29C 55/06 (2006.01) A01F 15/07 (2006.01) B29C 55/02 (2006.01) B29C 61/00 (2006.01) B29C 71/00 (2006.01) B65B 31/02 (2006.01) B65B 53/00 (2006.01)

Patent

CA 2336181

The invention disclosed herein relates to a method of treating plastics material fibres, filaments or film to improve their resistance to degradation by UV radiation and/or increase their resistance to gas (oxygen) transmissivity and an improved plastics material so treated, the method including stretching the fibre, filament or film beyond its yield point and allowing the film to at least partially relax.

L'invention concerne un procédé pour traiter des fibres, des filaments ou des films en matière plastique afin d'améliorer leur résistance à la dégradation par les rayons U.V. et/ou d'augmenter leur résistance à la transmissivité de gaz (d'oxygène) ainsi que des matières plastiques qui ont été soumis à ce traitement. Le procédé consiste à étirer la fibre, le filament, ou le film au-delà de leur limite apparente d'élasticité et à permettre au film de se détendre, au moins partiellement.

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