See-through layered body, transparent screen comprising same, and image projection device comprising same
[Problem] Provided is a see-through layered body which allows obtaining a projection type image display transparent screen with a wide viewing angle, and excellent image clarity and transparency. [Solving means] A see-through layered body according to the present invention comprises an intermediate resin film, two transparent substrates holding the intermediate resin film, wherein the intermediate resin film comprises a resin and from 0.0001 to 15% by mass of microparticles, having an average diameter of from 1 nm to 100 μm, and the center plane average roughness SRa of outermost surfaces on both sides of the layered body is from 0.05 to 5.5 nm.
1. A see-through layered body comprising an intermediate resin film and two transparent substrates holding the intermediate resin film, wherein
the intermediate resin film comprises a resin and from 0.0001 to 15% by mass of microparticles based on the resin, having an average diameter of from 1 nm to 100 μm,
the microparticles are selected from the group consisting of zirconium oxide, titanium oxide, aluminum oxide, magnesium oxide, cerium oxide, barium titanate, barium sulfate, calcium carbonate, silica, aluminum, silver, platinum, gold, titanium, nickel, tin, indium, diamond, tin-cobalt alloy, zinc sulfide, metal-coated mica, metal-coated glass, acrylic beads and styrene beads,
a center plane average roughness SRa of outermost surfaces on both sides of the layered body is from 0.05 to 5.5 nm,
a total light transmittance of the layered body is 65% or higher,
a haze value of the layered body is 1.5 to 35%,
an image clarity of the layered body is 70% or higher when measured by using an image clarity measuring device with an optical comb having a width of 0.125 mm, and
the layered body can display a projection image.
2. The see-through layered body according to claim 1 , wherein
the microparticles have a content from 0.001 to 2% by mass based on the resin and an average diameter of from 10 nm to 5 μm.
3. The see-through layered body according to claim 1 , wherein
the total light transmittance of the layered body is 70% or higher and the haze value of the layered body is 2 to 25%.
4. The see-through layered body according to claim 1 , wherein
a thickness of the layered body is from 10 μm to 100 mm.
5. The see-through layered body according to claim 1 , wherein
the layered body further comprises a transparent substrate.
6. A member for a vehicle, comprising the see-through layered body according to claim 1 .
7. A member for a house, comprising the see-through layered body according to claim 1 .
8. A reflection type transparent screen comprising the see-through layered body according to claim 1 .
9. A transmission type transparent screen comprising the see-through layered body according to claim 1 .
10. An image projection device comprising the see-through layered body according to claim 1 and a projection device.
11. The see-through layered body according to claim 1 , wherein
the microparticles have an average aspect ratio of from 3 to 800.
12. The see-through layered body according to claim 1 , wherein
the layered body displays the projection image.
13. The see-through layered body according to claim 1 , wherein the microparticles have a content from 0.0001 to 0.04% by mass based on the resin.