Multilayer film exhibiting an opaque appearance

Details Multilayer film exhibiting an opaque appearance Multilayer film exhibiting an opaque appearance

B - Operations, Transporting

32

B

B32B 27/08 (2006.01) A61F 13/15 (2006.01) B29D 7/01 (2006.01) A61F 13/46 (1990.01)

Patent

CA 2133447

2133447 9319714 PCTABS00027 A polymeric multilayer film (120) having a high percentage of fillers (126) to increase the opacity of the film is disclosed. The fillers are concentrated in a separate filler-containing layer (124) having about 20 to about 60 weight percent fillers uniformly dispersed therein and about 25 to about 80 percent of the thickness of the total multilayer film. The filler containing layer is coextruded with the outer layer (122) comprising the balance of the thickness of the multilayer film. The multilayer film has at least 15 weight percent fillers.

L'invention se rapporte à un film multicouche polymère (120) présentant un pourcentage élevé de charges (126) afin d'augmenter son opacité. Les charges sont concentrées dans une couche séparée (124) contenant de 20 à 60 % en poids environ de ces matières réparties de manière uniforme dans la couche, et présentant une épaisseur de l'ordre de 25 à 80 % environ de l'épaisseur du film multicouche intégral. La couche contenant les charges est coextrudée avec la couche externe (122) constituant l'épaisseur restante du film. Celui-ci comprend au moins 15 % en poids de charges.

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