Composition for air permeable film of high processability and permeability and production of air permeable film
AssigneeSK Corporation
InventorsYoung Keun Lee, Young Wook Kim, Tae Joon Kim, Byoung Cheon Jo
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Abstract
An air-permeable film is prepared by mono-axially drawing a composition comprising a linear low density polyethylene resin having a mw. distribution from 5 to 20, 1 to 100 parts by weight of propylene resin, 1 to 30 parts by weight of an ethylene-propylene copolymer, 1 to 30 parts by weight of a polyolefin resin which has a melt index of 12 or higher, and 50 to 200 parts by weight of an inorganic filler based on 100 parts by weight of total resin by 1.5 to 3 times.
Claims7
A composition for an air-permeable film, comprising:
- 30 to 100 weight parts of a linear, low density polyethylene resin which ranges, in molecular weight distribution, from 5 to 20;
- 1 to 100 weight parts of a polypropylene resin;
- 1 to 30 weight parts of an ethylene-propylene copolymer;
- 1 to 30 weight parts of a polyolefin resin which has a melt index of 12 or higher;
- and
- 50 to 200 weight parts of an inorganic filler based on 100 weight parts of the total resins.
A method for producing an air-permeable film, in which a composition comprising 30 to 100 weight parts of a linear low density polyethylene resin which ranges, in molecular weight distribution from 5 to 20, 1 to 100 weight parts of a polypropylene resin, 1 to 30 weight parts of an ethylene-propylene copolymer, 1 to 30 weight parts of a polyolefin resin which has a melt index of 12 or higher, and 50 to 200 weight parts of an inorganic filler based on 100 weight parts of the total resins, is mono-axially drawn by 1.5 to 3 times, whereby the air-permeable film can be provided with superior processability and permeability.
Dependencies are inferred from the claim text.