| 摘要 |
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<3> 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. |
