LAMINATE, METHOD FOR PRODUCING LAMINATE, LIGHT GUIDE BODY FOR LIGHT SOURCE DEVICES, AND LIGHT SOURCE DEVICE

1 . A laminate comprising:

a core layer;

a first cladding layer;

a second cladding layer; and

a light reflecting layer,

wherein the light reflecting layer, the second cladding layer, the core layer, and the first cladding layer are sequentially laminated,

wherein a refractive index of the first cladding layer and a refractive index of the second cladding layer are lower than a refractive index of the core layer, and

wherein a thickness of the light reflecting layer is 50 μm or more.

2 . The laminate according to claim 1 , further comprising a light emitting element.

3 . The laminate according to claim 1 , further comprising an adhesive layer between the light reflecting layer and the second cladding layer.

4 . The laminate according to claim 1 , wherein the light reflecting layer is made of a material which scatters and reflects light.

5 . The laminate according to claim 1 , wherein a material of the light reflecting layer is a material of at least one type selected from a group including a polyolefin resin, a polyester resin, an acrylic resin, and cellulose.

6 . The laminate according to claim 1 , wherein a reflectance of the light reflecting layer is 70% or more.

7 . The laminate according to claim 1 , wherein a reflectance of the light reflecting layer is 65% or less.

8 . The laminate according to claim 7 , wherein in the light reflecting layer, a layer of at least one type selected from a group including a design layer and a light diffusion layer is further laminated on a surface facing an interface between the light reflecting layer and the second cladding layer.

9 . A method for producing a laminate, comprising:

laminating a first cladding layer on a first surface of a core layer;

laminating a second cladding layer on a second surface of the core layer; and

laminating a light reflecting layer on a second surface of the second cladding layer,

wherein a refractive index of the first cladding layer and a refractive index of the second cladding layer are lower than a refractive index of the core layer,

wherein a thickness of the light reflecting layer is 50 μm or more, and

wherein laminating of the light reflecting layer is performed by lamination.

10 . A light guide body for light source device comprising the laminate according to claim 1 .

11 . A light source device comprising the laminate according to claim 1 and a light source.

12 . A single-sided light-emitting light source device comprising the laminate according to claim 6 and a light source.

13 . A double-sided light-emitting light source device comprising the laminate according to claim 7 and a light source.