초록 ▼

A multilayer, biaxially stretched, flexible, hermoplastic film having at least three (preferably five) layers (a), (b), and (c) with layer (b) disposed between layers (a) and (c), layers (a) and (c) each being a blend of at least 45% of a copolymer of ethylene and at least one C.sub.3 -C.sub.10 .alp

A multilayer, biaxially stretched, flexible, hermoplastic film having at least three (preferably five) layers (a), (b), and (c) with layer (b) disposed between layers (a) and (c), layers (a) and (c) each being a blend of at least 45% of a copolymer of ethylene and at least one C.sub.3 -C.sub.10 .alpha.-olefin, having a density of 0.900 g/cm.sup.3 to <0.915 g/cm.sup.3, and a melting point between 85.degree. C. and 125 .degree. C. with at least 5% of a high density polyethylene, and layer (b) being at least 45% of a copolymer of ethylene and at least one C.sub.3 -C.sub.10 .alpha.-olefin, having a density of 0.900 g/cm.sup.3 to <0.915 g/cm.sup.3, and a melting point of 85.degree. C.-125.degree. C., the film being 50.8 micrometers(.mu.) or less in thickness, and having a shrinkage value of at least 60% in at least one direction at 127.degree. C., and a process for making the film.

대표청구항 ▼

[ What is claimed is:] [1.] A multilayer, biaxially stretched, flexible, thermoplastic film comprising:at least three layers (a), (b), and (c) with layer (b) disposed between layers (a) and (c),wherein layer (a) comprises a blend of: at least 45%, based on the weight of said layer (a), of (i) a copo

[ What is claimed is:] [1.] A multilayer, biaxially stretched, flexible, thermoplastic film comprising:at least three layers (a), (b), and (c) with layer (b) disposed between layers (a) and (c),wherein layer (a) comprises a blend of: at least 45%, based on the weight of said layer (a), of (i) a copolymer of ethylene and at least one C.sub.3 -C.sub.10 .alpha.-olefin, said copolymer having a density of at least about 0.900 g/cm.sup.3 and less than 0.915 g/cm.sup.3, a melting point between 85.degree. C. and 125.degree. C., and having at least 80 wt. % of its polymeric units derived from ethylene; and at least 5%, based on the weight of said layer (a), of (ii) a high density polyethylene;layer (b) comprises at least 45%, based on the weight of said layer (b), of (i) a copolymer of ethylene and at least one C.sub.3 -C.sub.10 .alpha.-olefin, said copolymer having a density of at least about 0.900 g/cm.sup.3 and less than 0.915 g/cm.sup.3, a melting point between 85.degree. C. and 125.degree. C., and having at least 80 wt. % of its polymeric units derived from ethylene; andlayer (c) comprises a blend of: at least 45%, based on the weight of said layer (c), of (i) a copolymer of ethylene and at least one C.sub.3 -C.sub.10 .alpha.-olefin, said copolymer having a density of at least about 0.900 g/cm.sup.3 and less than 0.915 g/cm.sup.3, a melting point between 85.degree. C. and 125.degree. C., and having at least 80 wt. % of its polymeric units derived from ethylene; and at least 5%, based on the weight of said layer (c), of (ii) a high density polyethylene;wherein said film has a total film thickness of 50.8 micrometers (.mu.) or less, and a shrinkage value of at least 60% in at least one of the machine and transverse directions at 127.degree. C.