Patent ID: 8652601

Claim:
A cover film, comprising: a substrate layer; an intermediate layer comprising a resin composition comprising, by at least 50 mass %, a metallocene linear low-density polyethylene resin having a density of 0.900 to 0.940×10 3 kg/m 3 ; a sealant layer comprising an ethylenic copolymer resin comprising, by 50 to 85 mass %, an olefin component, said ethylenic copolymer resin being at least one selected from the group consisting of an ethylene-acrylic acid ester random copolymer resin, an ethylene-methacrylic acid ester random copolymer resin, a hydrogenated styrene-butadiene-styrene block copolymer, and a hydrogenated styrene-isoprene-styrene block copolymer; and an anti-static layer formed on a surface on the sealant layer side and comprising a resin composition comprising, dispersed in 40 to 80 mass % of an acrylic resin, 20 to 60 mass % of a cationic macromolecular anti-static agent comprising a side chain with a quaternary ammonium salt of formula (I): wherein A represents an oxygen atom or an imino group, R 1 represents a hydrogen atom or a methyl group, R 2 , R 3 and R 4 represent alkyl groups having 1 to 18 carbon atoms which are identical or different, R 5 represents an alkylene group having 1 to 4 carbon atoms, X represents an anion, and m represents an integer in the range of 1 to 5000.