Window envelopes with scratch resistant window film patches

Details Window envelopes with scratch resistant window film patches Window envelopes with scratch resistant window film patches

C - Chemistry, Metallurgy

08

L

C08L 25/06 (2006.01) B65D 27/04 (2006.01) C08J 5/18 (2006.01) C08L 23/12 (2006.01) C08L 53/02 (2006.01)

Patent

CA 2661457

The invention includes a composition comprising from at least 40 to 98 weight percent of at least one GPPS, from 0 to 98 weight percent of at least one HIPS, from at least 0.5 to 10 weight percent at least one styrene block copolymer, from at least 0.5 to 10 weight percent of at least one polypropylene wherein the combination of GPPS, HIPS, polypropylene and styrene block copolymer make up at least about 90 percent of the composition as well as a film made of the composition, an envelope window patch comprising the film, an envelope comprising the window patch, and a process for making the film.

L'invention concerne une composition contenant de 40 à 98 pour-cent en poids d'au moins un polystyrène standard (GPPS), de 0 à 98 pour-cent en poids d'au moins un polystyrène choc (HIPS), de 0,5 à 10 pour-cent en poids d'au moins un copolymère séquencé de styrène, de 0,5 à 10 pour-cent d'au moins un polypropylène, la combinaison de GPPS, de HIPS, de polypropylène et de copolymère séquencé de styrène constituant au moins 90 pour-cent la composition, ainsi qu'un film formé à partir de cette composition, une pièce pour fenêtre d'enveloppe comprenant ce film, une enveloppe comprenant cette pièce pour fenêtre, et un procédé pour produire ce film.

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