Laminate and method for manufacturing a laminate

Abstract

The present invention addresses the problem of providing a laminate having a high elastic modulus and a low linear thermal expansion coefficient, the laminate having an excellent design and excellent durability. The present invention relates to a laminate that includes, in the order given: a fiber layer containing fibrous cellulose with a fiber width of 1000nm or less; a bonding layer; and a resin layer. The resin layer contains an amorphous resin, the bonding layer contains a polymer, and the glass transition temperature of the polymer is less than 170°C.

Claims

1. A laminate having, in this order, a fiber layer containing fibrous cellulose with a fiber width of 1000 nm or less, an adhesive layer, and a resin layer, The total basis weight of the fiber layer is 300 g / m² or more. The resin layer contains polycarbonate as an amorphous resin, and the polycarbonate content is 50% by mass or more of the total mass of the resin layer. A laminate comprising an adhesive layer containing a polymer, wherein the polymer is polycarbonate, the glass transition temperature of the polymer is less than 170°C, and the polycarbonate content is 50% by mass or more of the total mass of the adhesive layer.

2. The laminate according to claim 1, wherein the thickness of the laminate is 200 μm or more.

3. The laminate according to claim 1 or 2, wherein the total light transmittance is 80% or more.

4. The laminate according to any one of claims 1 to 3, wherein the haze is 5% or less.

5. A laminate according to any one of claims 1 to 4, wherein the YI value is 15 or less.

6. A laminate according to any one of claims 1 to 5, wherein the flexural modulus is 2.3 GPa or more.

7. The laminate according to any one of claims 1 to 6, wherein the linear thermal expansion coefficient is 70 ppm / K or less.

8. The laminate according to any one of claims 1 to 7, further comprising an adhesive layer and a resin layer on the other surface of the fiber layer.

9. The laminate according to claim 8, wherein the fibrous cellulose is unevenly distributed in the region near the surface in the thickness direction of the laminate.

10. The laminate according to claim 8, wherein the fibrous cellulose is unevenly distributed in the central region in the thickness direction of the laminate.

11. The laminate according to any one of claims 8 to 10, wherein the fiber layer is not exposed in the laminate.

12. A method for manufacturing a laminate, comprising the step of laminating a fiber layer containing fibrous cellulose with a fiber width of 1000 nm or less, an adhesive layer, and a resin layer in this order, and then hot-pressing, The resin layer contains polycarbonate as an amorphous resin, and the polycarbonate content is 50% by mass or more of the total mass of the resin layer. A method for manufacturing a laminate, wherein the adhesive layer contains a polymer, the polymer is polycarbonate, the glass transition temperature of the polymer is less than 170°C, and the polycarbonate content is 50% by mass or more of the total mass of the adhesive layer.

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