Method to produce matte and opaque biaxially oriented...

Details Method to produce matte and opaque biaxially oriented... Method to produce matte and opaque biaxially oriented...

B - Operations, Transporting

32

B

B32B 27/08 (2006.01)

Patent

CA 2727436

A biaxially oriented laminate film including a core layer including a blend of crystalline polylactic acid polymer and an inorganic antiblock particle which is biaxially oriented at low transverse direction orientation temperatures to impart a degree of cavitation around the particles such that a matte or opaque appearance is obtained. The laminate film may further have additional layers such as a heat sealable layer disposed on one side of the core layer including an amorphous polylactic acid resin and/or a polylactic acid resin-containing layer disposed on the side of the core layer opposite the heat sealable layer, a metal layer, or combinations thereof.

La présente invention se rapporte à un film stratifié à orientation biaxiale comprenant une couche noyau comprenant un mélange de polymère dacide polylactique cristallin et une particule antiblocage inorganique à orientation biaxiale à de faibles températures dorientation dans le sens transversal pour transmettre un degré de cavitation autour des particules de sorte quun aspect mat ou opaque soit obtenu. Le film stratifié peut en outre comporter des couches supplémentaires telles quune couche thermosoudable disposée sur un côté de la couche noyau comprenant une résine dacide polylactique amorphe et/ou une couche contenant une résine dacide polylactique disposée sur le côté de la couche noyau à lopposé de la couche thermosoudable, une couche métallique, ou des combinaisons de celles-ci.

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