Abstract: A film for a membrane structure, which comprises a film substrate containing a fluororesin, a photocatalyst layer and an interlayer interposed between the film substrate and the photocatalyst layer, wherein the fluororesin is at least one member selected from the group consisting of an ethylene/tetrafluoroethylene copolymer, a tetrafluoroethylene/hexafluoropropylene copolymer, a tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer, a polyvinyl fluoride and a polyvinylidene fluoride; the interlayer contains an organic-inorganic hybrid polymer obtained by hydrolyzing/co-condensing at least one member selected from the group consisting of an organosilane, a hydrolysate of an organosilane and a condensate of an organosilane, and a silyl group-containing organic polymer; and the mass remaining ratio of the organic-inorganic hybrid polymer is from 50 to 80% at 500° C. measured by thermogravimetric analysis.

Abstract: A film for a membrane structure, which comprises a film substrate containing a fluororesin, a photocatalyst layer and an interlayer interposed between the film substrate and the photocatalyst layer, wherein the fluororesin is at least one member selected from the group consisting of an ethylene/tetrafluoroethylene copolymer, a tetrafluoroethylene/hexafluoropropylene copolymer, a tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer, a polyvinyl fluoride and a polyvinylidene fluoride; the interlayer contains an organic-inorganic hybrid polymer obtained by hydrolyzing/co-condensing at least one member selected from the group consisting of an organosilane, a hydrolysate of an organosilane and a condensate of an organosilane, and a silyl group-containing organic polymer; and the mass remaining ratio of the organic-inorganic hybrid polymer is from 50 to 80% at 500° C. measured by thermogravimetric analysis.

Abstract: A carrier film which is a laminated film having a film of a tetrafluoroethylene/ethylene copolymer laminated on each side of a stretched film of a polyester resin, wherein the haze of the laminated film is at most 5% as measured in accordance with JIS K7105.

Abstract: A method for joining films having a hydrophilized surface at a single surface and an excellent melt-bonding force at the melt-bonded portion, which is formed by disposing two films (A) having a hydrophilized surface at a single surface, to align the hydrophilized surfaces so as to butt each end portion; overlaying a film (B) on a side of non-hydrophilized surface of the films (A), so as to bridge the butting portion, and hot-pressing the overlapping portion (c1)5 to join the two films (A). A wide film obtained by the above-mentioned method is suitable for a covering material for agricultural use.

Abstract: A carrier film which is a laminated film having a film of a tetrafluoroethylene/ethylene copolymer laminated on each side of a stretched film of a polyester resin, wherein the haze of the laminated film is at most 5% as measured in accordance with JIS K7105.

Abstract: A method for joining films having a hydrophilized surface at their single surface and an excellent melt-bonding force at the melt-bonded portion, which is formed by disposing two film (A) having a hydrophilized surface at their single surface to align the hydrophilized surfaces so as to butt each end portion; overlaying a film (B) on a side of non-hydrophilized surface of the films (A) so as to bridge the butting portion, and hot-pressing the overlapping portion (c1) to join the two films (A). The wide film obtained by the above-mentioned method is suitable for a covering material for agricultural use.