Laminate structure, cable and tube
A laminate structure includes a first layer as a substrate and a second layer provided on the first layer. The second layer is composed of a rubber composition including a rubber component, first fine particles for providing a surface with irregularity, and second fine particles for shielding UV-C light. When performing Raman mapping analysis on a first peak derived from oscillation of the second fine particles in Raman scattering spectrum obtained by Raman scattering measurement of the second layer, the second layer includes a region where an intensity of the first peak is greater in an area where the first fine particles are not present than an area where the first fine particles are present.
1 . A method for manufacturing a laminate structure, the laminate structure comprising a first layer comprising a silicone rubber as a base material and first TiO 2 fine particles and a second layer being provided on the first layer and comprising a silicone rubber as a base material and second TiO 2 fine particles, the method comprising:
forming the first layer with a Ti concentration of the first layer being 0.35 mass % or more and 3.0 mass % or less;
forming a coating film by coating a liquid silicone rubber composition including the second TiO 2 fine particles on the first layer;
forming the second layer with a Ti concentration of the second layer being 1.0 mass % or more and 4.4 mass % or less by curing the coating film,
wherein the Ti concentration of the second layer is higher than the Ti concentration of the first layer, and
the second layer has a higher UV-C shielding ability than the first layer, and
wherein an average particle size of the second TiO 2 fine particles is 10 nm or more and 1 μm or less.
2 . The method for manufacturing the laminate structure, according to claim 1 , wherein the second layer includes at least one of silicone resin fine particles and silica fine particles.
3 . The method for manufacturing the laminate structure, according to claim 1 , wherein the first layer is formed by extrusion molding.
4 . A method for manufacturing a laminate structure, the laminate structure comprising a first layer comprising a silicone rubber as a base material and first TiO 2 fine particles and a second layer being provided on the first layer and comprising a silicone rubber as a base material and second TiO 2 fine particles, the method comprising:
forming the first layer with a Ti concentration of the first layer being 0.35 mass % or more and 3.0 mass % or less;
forming a coating film by coating a liquid silicone rubber composition including the second TiO 2 fine particles on the first layer;
forming the second layer with a Ti concentration of the second layer being 1.0 mass % or more and 4.4 mass % or less by curing the coating film,
wherein the first layer consists essentially of a silicone rubber and TiO 2 fine particles,
wherein the first layer consists essentially of the silicone rubber and the first TiO 2 fine particles, wherein the second layer has a higher UV-C shielding ability than the first layer, and
wherein an average particle size of the second TiO 2 fine particles is 10 nm or more and 1 μm or less.
5 . The method for manufacturing the laminate structure, according to claim 4 , wherein the second layer includes at least one of silicone resin fine particles and silica fine particles.
6 . The method for manufacturing the laminate structure, according to claim 4 , wherein the first layer is formed by extrusion molding.