초록 ▼

A resin film of a two-layer-construction comprising: (a) a resin layer R1 including a non-stretched resin film which contains a thermoplastic polyester resin containing 3 to 30 percent by weight in a weight fraction in the entire resin of a granular resin with a grain diameter of 0.1 to 5 μm, t

A resin film of a two-layer-construction comprising: (a) a resin layer R1 including a non-stretched resin film which contains a thermoplastic polyester resin containing 3 to 30 percent by weight in a weight fraction in the entire resin of a granular resin with a grain diameter of 0.1 to 5 μm, the granular resin being a modified polyolefin resin containing 2 to 20 percent by weight of a functional group derived from carboxylic acid in terms of carboxylic acid, and (b) a polyester resin layer R0 containing at least one of polyethylene terephthalate and isophthalic acid copolymerized polyethylene terephthalate, as a basic skeleton, wherein the resin layer R1 and the resin layer R2 are laminated to each other.

대표청구항 ▼

What is claimed is: 1. A resin film of a two-layer construction comprising: (a) a resin layer R1 comprising a non-stretched resin film which consists essentially of a thermoplastic polyester resin containing 3 to 30 percent by weight in a weight fraction in the entire resin of a granular resin with

What is claimed is: 1. A resin film of a two-layer construction comprising: (a) a resin layer R1 comprising a non-stretched resin film which consists essentially of a thermoplastic polyester resin containing 3 to 30 percent by weight in a weight fraction in the entire resin of a granular resin with a grain diameter of 0.1 to 5 μm, said granular resin is a modified polyolefin resin containing 2 to 20 percent by weight of a functional group, said functional group being a functional group selected from the group consisting of a carboxylic acid group and a carboxylic acid ester group, and (b) a polyester resin layer R0 containing at least one of polyethylene terephthalate and isophthalic acid copolymerized polyethylene terephthalate, as a basic skeleton, wherein the resin layer R1 and the resin layer R0 are laminated to each other. 2. The resin film according to claim 1, wherein the resin layer R1 has a thickness of 10 to 50 μm; the resin layer R0 has a thickness of 1 to 10 μm; and a thickness ratio of the resin layer R1 to the resin layer R0 is 2 to 10. 3. The resin film according to claim 1, which further comprises 5 to 40 percent by weight of a pigment. 4. The resin film according to claim 1, wherein said thermoplastic polyester resin is a polyester containing at least one of a polyethylene terephthalate and isophthalic acid copolymerized polyethylene terephthalate, as a basic skeleton. 5. The resin film according to claim 1, wherein the thermoplastic resin contains terephthalic acid and isophthalic acid, which are dicarboxylic acid components constituting the thermoplastic polyester resin, in a molar ratio of 97/3 to 85/15. 6. The resin film according to claim 1, wherein the resin layer R1 has a thickness of 15 to 25 μm and the resin layer R0 has a thickness of 3 to 5 μm. 7. The resin film according to claim 6, wherein the resin layer R0 has an intrinsic viscosity of 0.5 to 1.0 dl/g. 8. The resin film according to claim 1, wherein the resin layer R0 has an intrinsic viscosity of 0.3 to 2.0 dl/g. 9. A resin laminated metal sheet comprising a metal sheet and a resin, wherein at least one surface of the metal sheet is coated with the resin film as set forth in claim 1, so that the resin layer R1 is in contact with the metal sheet. 10. The resin laminated metal sheet according to claim 9, wherein a plane orientation coefficient in a direction parallel to a film surface of the resin film is lower than 0.010. 11. The resin laminated metal sheet according to claim 9, wherein the resin film is formed by extruding two types of resins comprising the resin layer R1 and the resin layer R0, simultaneously from one T die directly on a surface of the metal sheet. 12. The resin laminated metal sheet according to claim 9, wherein the metal sheet comprises iron. 13. A method for manufacturing a resin laminated metal sheet comprising heating a resin constituting the resin layer R1 as set forth in claim 1, and a resin constituting the resin layer R0 as set forth in claim 1, to a temperature in a range of the melting point of the thermoplastic polyester resin of the resin layer R1 plus 10째 C. to said melting point plus 50째 C. to melt both resin layer R0 and resin layer R1 to form two melted resins, and extrusion laminating the two melted resins in two layers on a surface of a metal sheet. 14. The manufacturing method for a resin laminated metal sheet according to claim 13, wherein the resin constituting the resin layer R1 as set forth in claim 1 and the resin constituting the resin layer R0 as set forth in claim 1 are inserted into separate extruding machines and are melted. 15. The resin film according to claim 1, wherein said functional group is a carboxylic acid group. 16. The resin film according to claim 1, wherein said functional group is a carboxylic acid ester group. 17. The resin film according to claim 1, wherein said modified polyolefin resin is a carboxylic acid modified polyolefin obtained by copolymerization, graft polymerization or block polymerization of a monomer containing a carboxylic acid group or a carboxylic acid ester group. 18. The resin film according to claim 17, wherein said monomer is selected from the group consisting of acrylic acid, methacrylic acid, vinyl acetate, vinyl propionate, maleic acid, maleic anhydride, itaconic acid, and an unsaturated carboxylic acid with 3 to 8 carbon atoms. 19. The resin film according to claim 17, wherein said monomer is monomethylester maleate. 20. The resin film according to claim 17, wherein said monomer is selected from the group consisting of methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, n-propyl acrylate, n-propyl methacrylate, isobutyl acrylate, isobutyl methacrylate, n-butyl acrylate, n-butyl methacrylate, 2-hydroxyethyl carboxylate, 2-hydroxyethyl methacrylate, monomethylester maleate, glycidyl acrylate, glycidyl methacrylate, vinyl acetate, acrylamine and acrylamide. 21. A method for manufacturing a resin film comprising: (a) inserting a thermoplastic polyester resin containing 3 to 30 percent by weight in a weight fraction in the entire resin of a granular resin with a grain diameter of 0.1 to 5 μm, said granular resin is a modified polyolefin resin containing 2 to 20 percent by weight of a functional group, said functional group being a functional group selected from the group consisting of a carboxylic acid group and a carboxylic acid ester group in an extruding machine as a raw material resin to melt the resin and form a molten resin, (b) inserting a polyester resin layer R0 containing at least one of polyethylene terephthalate and isophthalic acid copolymerized polyethylene terephthalate, as a basic skeleton, in an extruding machine to melt the polyester resin and form a molten polyester resin, and (c) forming a film comprising a two-layer construction by extruding the molten resin and the molten polyester resin from one T die.