초록 ▼

A polypropylene based composition is described which comprises a mixture of (A) a propylene polymer or copolymer and (B) an alkylene-alkyl acrylate copolymer. These polypropylene based compositions are useful in the preparation of continuous films such as by extrusion, and the films can be oriented

A polypropylene based composition is described which comprises a mixture of (A) a propylene polymer or copolymer and (B) an alkylene-alkyl acrylate copolymer. These polypropylene based compositions are useful in the preparation of continuous films such as by extrusion, and the films can be oriented by stretching in the machine direction. The films prepared from the polypropylene compositions of this invention exhibit a variety of useful properties including the desired printability, stiffness, and die-cuttability to be useful as a facestock in preparing labels. Films prepared from the polypropylene based compositions of the invention also can be used as a base film, and the films can be overlaminated with a functional film. Machine-direction oriented monolayer and multilayer film facestocks for labels, and adhesive containing film labelstock for use in adhesive labels also are described. The present invention, in one embodiment, relates to the discovery that the films of the polypropylene compositions are useful as the facestocks in label applications. The clear films prepared from the polypropylene compositions of the invention also are useful for laminating over other polymer films and film facestocks to provide improved printability, die-cuttability and/or scuff resistance characteristics to the polymer films and facestocks.

대표청구항 ▼

1. A film comprising a mixture of:(A) a propylene homopolymer or copolymer having a melt flow rate of from about 6 to about 14, and (B) an alkylene-alkyl acrylate or methacrylate copolymer, wherein the film has been oriented by hot stretching in the machine direction and annealing the stretched film

1. A film comprising a mixture of:(A) a propylene homopolymer or copolymer having a melt flow rate of from about 6 to about 14, and (B) an alkylene-alkyl acrylate or methacrylate copolymer, wherein the film has been oriented by hot stretching in the machine direction and annealing the stretched film, and the L+W stiffness of the film in the cross-direction is less than 0.75 times the stiffness in the machine direction.