Laminated film and method of producing the same
Provided is means that enables a hard coat layer to resist cracking and to have improved scratch resistance in a laminated film including a substrate, a surfactant-containing layer on one surface of the substrate, and the hard coat layer on the other surface of the substrate. The laminated film includes a substrate, a surfactant-containing layer that is disposed on one surface of the substrate and contains a surfactant, and a hard coat layer disposed on the other surface of the substrate, wherein the hard coat layer contains 0.001 to 3% by weight of a (meth)acrylic modified silicone compound.
1. A laminated film comprising:
a substrate;
a surfactant-containing layer that is disposed on one surface of the substrate and contains a surfactant; and
a hard coat layer disposed on another surface of the substrate, wherein
the hard coat layer contains 0.001 to 3% by weight of a (meth)acrylic modified silicone compound, and
the surfactant-containing layer contains a water-soluble resin.
2. The laminated film according to claim 1 , wherein the surfactant is one or more selected from the group consisting of a long chain alkyl group-containing surfactant, a silicon-based surfactant, and a fluorosurfactant.
3. The laminated film according to claim 1 , wherein the hard coat layer comprises a product formed by applying an organic solvent-containing coating liquid and then drying the coating.
4. The laminated film according to claim 1 , wherein the hard coat layer contains inorganic nanoparticles.
5. The laminated film according to claim 4 , wherein the inorganic nanoparticles comprise one or more selected from the group consisting of ATO, ITO, cesium-doped tungsten oxide, gallium zinc oxide, aluminum zinc oxide, and zinc antimonate.
6. The laminated film according to claim 4 , wherein the hard coat layer contains 10 to 80% by weight of the inorganic nanoparticles.
7. The laminated film according to claim 1 , wherein the hard coat layer comprises a resin component, and a hydroxyl group-containing urethane acrylate makes up at least 50% by weight of the resin component being 100% by weight.
8. The laminated film according to claim 1 , wherein the surfactant-containing layer is a dielectric multilayer coating comprising a stack of alternating low and high refractive index layers.
9. A method of producing a laminated film, the method comprising:
forming a surfactant-containing layer on one surface of a substrate to obtain a first laminate, wherein the surfactant-containing layer contains a water-soluble resin;
winding the first laminate into a roll;
unwinding the roll of the first laminate;
applying a coating liquid to a surface of the substrate opposite to its surface on which the surfactant-containing layer is formed in the first laminate, wherein the coating liquid contains 0.001 to 3% by weight of a (meth)acrylic modified silicone compound based on 100% by weight of solids in the coating liquid; and
drying the coating to form a hard coat layer, so that a laminated film is obtained.
10. The laminated film according to claim 2 , wherein the hard coat layer comprises a product formed by applying an organic solvent-containing coating liquid and then drying the coating.
11. The laminated film according to claim 2 , wherein the hard coat layer contains inorganic nanoparticles.
12. The laminated film according to claim 2 , wherein the hard coat layer comprises a resin component, and a hydroxyl group-containing urethane acrylate makes up at least 50% by weight of the resin component being 100% by weight.
13. The laminated film according to claim 2 , wherein the surfactant-containing layer is a dielectric multilayer coating comprising a stack of alternating low and high refractive index layers.
14. The laminated film according to claim 3 , wherein the hard coat layer contains inorganic nanoparticles.