POROUS FILM, ITS PRODUCTION, AND BAG

PROBLEM TO BE SOLVED: To obtain a porous polyethylene film which is excellent in fluid permeability, homogeneity thereof, and heat sealability by stretching a film formed from a compsn. mainly comprising a linear low-density polyethylene, a metallocene linear low-density polyethylene, and an inorg....

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Bibliographische Detailangaben
Hauptverfasser:	ONE TATSUHIKO, HIROHASHI TOSHIAKI, HONDA MAKOTO, ONISHI HIROHITO
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING BANDAGES, DRESSINGS OR ABSORBENT PADS CHEMISTRY COMPOSITIONS BASED THEREON CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS CONVEYING DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS FILTERS IMPLANTABLE INTO BLOOD VESSELS FIRST-AID KITS FOMENTATION GENERAL PROCESSES OF COMPOUNDING HANDLING THIN OR FILAMENTARY MATERIAL HUMAN NECESSITIES HYGIENE INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS MEDICAL OR VETERINARY SCIENCE METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES PACKAGES PACKAGING ELEMENTS PACKING PERFORMING OPERATIONS PROSTHESES SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS STORING THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING TREATMENT OR PROTECTION OF EYES OR EARS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To obtain a porous polyethylene film which is excellent in fluid permeability, homogeneity thereof, and heat sealability by stretching a film formed from a compsn. mainly comprising a linear low-density polyethylene, a metallocene linear low-density polyethylene, and an inorg. filler. SOLUTION: This porous film is obtd. by mono-or biaxially stretching a film formed by melting a polyethylene resin compsn. The compsn. at least contains 100 pts.wt. linear low-density polyethylene (A), 5-100 pts.wt. metallocene linear lowdensity polyethylene (B) having a density of 0.85-0.93g/cm and an MFR of 1-25 g/10min, and 50-300 pts.wt. inorg. filler (C) having an average particle size of 30μm or lower. 70wt.% or lower of ingredient B may be replaced by at least one ethylene copolymer selected from among ethylene-vinyl acetate copolymers, ethylene-ethyl acrylate copolymers, and ethylene-methacrylic acid copolymers. The compsn. does not contain a polyester resin.