Laminated film for fiber adhesion and/or fiber sheet surface protection and thermosetting composition for fiber adhesion and/or fiber sheet surface protection
The present invention relates to a laminated film for fiber adhesion and/or fiber sheet surface protection in which a layer [I] containing a thermosetting composition [i] and a support film [II] are laminated, wherein the thermosetting composition [i] contains a thermal polymerization initiator (C) having a 10-hour half-life temperature of 65° C. or higher.
1. A laminated film for fiber adhesion and/or fiber sheet surface protection in which a layer [I] containing a thermosetting composition [i] and a support film [II] are laminated, wherein layer [I] has a thickness of from 50 μm to 250 μm,
wherein the thermosetting composition [i] contains a thermal polymerization initiator (C) having a 10-hour half-life temperature of 65° C. or higher,
wherein the thermosetting composition further contains a binder polymer (A), and
wherein the binder polymer (A) is a (meth)acrylic resin (A1).
2. The laminated film for fiber adhesion and/or fiber sheet surface protection according to claim 1 , wherein the thermosetting composition [i] further contains a reactive oligomer (B) having one or more unsaturated groups.
3. The laminated film for fiber adhesion and/or fiber sheet surface protection according to claim 1 , wherein the thermal polymerization initiator (C) having a 10-hour half-life temperature of 65° C. or higher is an azobis-based compound having a 10-hour half-life temperature of 65° C. or higher or a peroxide-based compound having a 10-hour half-life temperature of 65° C. or higher.
4. The laminated film for fiber adhesion and/or fiber sheet surface protection according to claim 1 , wherein the thermosetting composition [i] further contains a reactive monomer (D) having one or more unsaturated groups.
5. The laminated film for fiber adhesion and/or fiber sheet surface protection according to claim 2 , wherein the thermosetting composition [i] further contains a reactive monomer (D) having one or more unsaturated groups.
6. The laminated film for fiber adhesion and/or fiber sheet surface protection according to claim 2 , wherein the reactive oligomer (B) having one or more unsaturated group s is a urethane (meth)acrylate-based oligomer (B1).
7. The laminated film for fiber adhesion and/or fiber sheet surface protection according to claim 6 , wherein the urethane (meth)acrylate-based oligomer (B1) is a urethane (meth)acrylate-based compound obtained by a reaction of a hydroxyl group-containing (meth)acrylate-based compound (b1), a polyvalent isocyanate-based compound (b2), and a polyol-based compound (b3).
8. The laminated film for fiber adhesion and/or fiber sheet surface protection according to claim 6 , wherein the urethane (meth)acrylate-based oligomer (B1) has a weight average molecular weight of 500 to 50,000.
9. The laminated film for fiber adhesion and/or fiber sheet surface protection according to claim 1 , wherein a protective film [III] is laminated on a side of the layer [I] containing the thermosetting composition [i] where the support film [II] is not laminated.