Wrapping materials
AssigneeFuji Photo Film Co., Ltd.
InventorMutsuo Akao
Life of this patent
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Abstract
A wrapping material is provided, which comprises two mono-axially stretched thermoplastic resin films, placed in such a manner that the stretching axes of the thermoplastic resin films cross each other at an angle of 45.degree. to 90.degree., and an adhesive layer comprising an ethylene-ethyl acrylate copolymer resin sandwiched therebetween. This wrapping material has good physical strength and is suitable for use in the preparation of bags.
Claims7
A wrapping material, comprising:
- first and second mono-axially stretched thermoplastic resin films on both surfaces thereof, said films laminated in such a manner that the stretching axes of the mono-axially stretched thermoplastic resin films cross each other at an angle of 45.degree. to 90.degree.;
- and
- an adhesive layer consisting essentially of an ethylene-ethyl acrylate copolymer resin or an ethylene-ethyl acrylate copolymer resin and light-shielding substances, which ethylene-ethyl acrylate copolymer resin has an ethylene/ethyl acrylate copolymerizing ratio of about 95/5 to about 65/35 by weight, a molecular weight of about 15,000 to about 45,000, a Vicant softening point of about 40.degree. C. to about 80.degree. C. and a melt index of about 1 g/10 min to about 20 g/10 min, sandwiched between said first and second films.
A wrapping material having an improved antistatic property for wrapping a light-sensitive article, said wrapping material comprising:
- first and second mono-axially stretched thermoplastic resin films on both surfaces thereof, said films laminated in such a manner that the stretching axes of the mono-axially stretched theremoplstic resin films cross each other at an angle of 45.degree. to 90.degree.;
- and
- an adhesive layer consisting essentially of an ethylene-ethyl acrylate copolymer resin or an ethylene-ethyl acrylate copolymer resin and light-shielding substances, which ethylene-ethyl acrylate copolymer resin has an ethylene/ethyl acrylate copolymerizing ratio of about 95/5 to about 65/35 by weight, a molecular weight of about 15,000 to about 45,000, a Vicant softening point of about 40.degree. C. to about 80.degree. C. and a melt index of about 1 g/10 min to about 20 g/10 min, sandwiched between said first and second films.
A bag for wrapping light-sensitive material made of a wrapping material having an improved anti-static property, said wrapping material comprising:
- first and second mono-axially stretched theremoplastic resin films on both surfaces thereof, said films laminated in such a manner that the stretching axes of the mono-axially stretched thermoplastic resin films cross each other at an angle of 45.degree. to 90.degree.;
- and
- an adhesive layer consisting essentially of an ethylene-ethyl acrylate copolymer resin or an ethylene-ethyl acrylate copolymer resin and light-shielding substances, which ethylene-ethyl acrylate copolymer resin has an ethylene/ethyl acrylate copolymerizing ratio of about 95/5 to about 65/35 by weight, a molecular weight of about 15,000 to about 45,000, a Vicant softening point of about 40.degree. C. to about 80.degree. C. and a melt index of about 1 g/10 min to about 20 g/10 min, sandwiched between said first and second films.
Dependencies are inferred from the claim text.