Barrier composite films and method of producing the same

A barrier composite film comprising a base film layer, a coat layer formed on at least one surface of said base film layer, and an inorganic oxide layer formed on said anchor coat layer, wherein said coat layer comprises 100 parts by weight of (A) a noncrystalline thermoplastic chlorine-containing resin having a glass transition temperature of 25.degree. to 60.degree. C. and an acid value of 0 to 30 mg KOH/g, 10 to 500 parts by weight of (B) a polyisocyanate compound having at least two isocyanate groups per molecule with a molecular weight of 150 to 1,000, and 1 to 50 parts by weight of (C) a noncrystalline saturated polyester resin having a glass transition temperature of -10.degree. to 20.degree. C., a number average molecular weight of 1.times.10.sup.4 to 5.times.10.sup.4, a hydroxyl value of 0 to 15 mg KOH/g or an acid value of 0 to 10 mg KOH/g and being substantially unreactive to the polyisocyanate compound, and wherein the elastic modulus of said coat layer is 0.1.times.10.sup.1 to 1.times.10.sup.3 N/mm.sup.2.

A barrier composite film comprising a base film layer, a coat layer formed on at least one surface of said base film layer, and an inorganic oxide layer formed on said coat layer, wherein said coat layer comprises 100 parts by weight of (A) a noncrystalline thermoplastic chlorine-containing resin having a glass transition temperature of 25.degree. to 60.degree. C. and an acid value of 0 to 30 mg KOH/g, 10 to 500 parts by weight of (B) a polyisocyanate compound having at least two isocyanate groups per molecule with a molecular weight of 150 to 1,000, and 1 to 50 parts by weight of (C) a noncrystalline saturated polyester resin having a glass transition temperature of -10.degree. to 20.degree. C., a number average molecular weight of 1.times.10.sup.4 to 5.times.10.sup.4, a hydroxyl value of 0 to 15 mg KOH/g or an acid value of 0 to 10 mg KOH/g and being substantially unreactive to the polyisocyanate compound, and wherein said coat layer has a peel strength with respect to the base layer of not less than 100 g/15 mm as determined after retort treatment at a temperature of 120.degree. C. for 30 minutes.

A barrier composite film comprising a base film layer, a coat layer formed on at least one side of said base film layer, and an inorganic layer having a thickness of 100 to 5,000 .ANG. formed on said coat layer, wherein said coat layer comprises 100 parts by weight of (A) a noncrystalline thermoplastic chlorine-containing resin having a glass transition temperature of 25.degree. to 60.degree. C. and an acid value of 0 to 30 mg KOH/g, 25 to 400 parts by weight of (B) a polyisocyanate compound having three or more isocyanate groups per molecule with a molecular weight of 150 to 1,000, and 2 to 50 parts by weight of (C) a noncrystalline saturated polyester resin having a glass transition temperature of 0.degree. to 20.degree. C., a number average molecular weight of 1.times.10.sup.4 to 3.times.10.sup.4, a hydroxyl value of 0 to 10 mg KOH/g or an acid value of 0 to 10 mg KOH/g and being substantially unreactive to the polyisocyanate compound (B).

A barrier composite film comprising a base film layer, a coat layer formed on at least one side of said base film layer, and an inorganic layer having a thickness of 100 to 5,000 .ANG. formed on said coat layer, wherein said coat layer comprises (A) a vinyl chlorine-vinyl acetate-series copolymer containing at least vinyl chloride and vinyl acetate as monomer components, (B) a polyisocyanate compound and (C) a saturated polyester resin having a glass transition temperature of -10.degree. C. to 20.degree. C. and being substantially unreactive to the polyisocyanate compound.

A method of producing a barrier composite film which comprises forming an coat layer comprising 100 parts by weight of (A) a noncrystalline thermoplastic chlorine-containing resin having a glass transition temperature of 25.degree. to 60.degree. C. and an acid value of 0 to 30 mg KOH/g, 10 to 500 parts by weight of (B) a polyisocyanate compound having at least two isocyanate groups per molecule with a molecular weight of 150 to 1,000, and 1 to 50 parts by weight of (C) a noncrystalline saturated polyester resin having a glass transition temperature of -10.degree. to 20.degree. C., a number average molecular weight of 1.times.10.sup.4 to 5.times.10.sup.4, a hydroxyl value of 0 to 15 mg KOH/g or an acid value of 0 to 10 mg KOH/g and being substantially unreactive to said polyisocyanate compound on at least one surface of a base film layer, and depositing an inorganic layer on said coat layer.