RECORDING MEDIUM AND METHOD FOR PRODUCING RECORDED MATTER HAVING THREE-DIMENSIONAL IMAGE

Abstract

A recording medium for producing a recorded matter having a three-dimensional image comprises: a substrate; and a foaming layer being provided on the substrate and containing a foaming material which foams with heat and a binder resin. A contact angle of water to a surface of the foaming layer 30 seconds after the water is brought into contact with the surface of the foaming layer is 30° or more and 80° or less, and a ratio of a diameter of a water droplet 30 seconds after the water is brought into contact with the surface of the foaming layer to a diameter of the water droplet 0.01 seconds after the water is brought into contact with the surface of the foaming layer is 1.3 times or less.

Description

Claims

1. A recording medium comprising: a substrate; anda foaming layer being provided on the substrate and containing a foaming material which foams with heat and a binder resin, whereina contact angle of water to a surface of the foaming layer 30 seconds after the water is brought into contact with the surface of the foaming layer is 30° or more and 80° or less, anda ratio of a diameter of a water droplet 30 seconds after the water is brought into contact with the surface of the foaming layer to a diameter of the water droplet 0.01 seconds after the water is brought into contact with the surface of the foaming layer is 1.3 times or less.

2. The recording medium according to claim 1, wherein the foaming material is a foaming particle including: a shell layer containing a thermoplastic resin; and a volatile material encapsulated in the shell layer.

3. The recording medium according to claim 2, wherein the thermoplastic resin is polyacrylonitrile, andthe volatile material is isobutane.

4. The recording medium according to claim 1, wherein the binder resin is at least one selected from the group consisting of acrylic resins, urethane resins, and polyacrylonitrile resins.

5. The recording medium according to claim 1, wherein a glass transition temperature of the binder resin is lower than a foaming start temperature of the foaming material by 70° C. or more.

6. The recording medium according to claim 1, wherein a foaming start temperature of the foaming material is 80° C. or more and 100° C. or less.

7. The recording medium according to claim 1, wherein a glass transition temperature of the binder resin is -10° C. or more and 10° C. or less.

8. The recording medium according to claim 1, wherein an arithmetic average roughness Ra of the surface of the foaming layer is 1.0 µm or more.

9. The recording medium according to claim 1, wherein a Martens hardness of the foaming layer is 15 N/mm2 or less.

10. The recording medium according to claim 1, wherein a creep CIT1 of the foaming layer after an increase in load as measured under the following conditions is 25 or more and 70 or less.Indentation force F: 3.0 µm/20 sCreep time C: 20.0 s.

11. The recording medium according to claim 1, wherein the contact angle of water to a surface of the foaming layer 30 seconds after the water is brought into contact with the surface of the foaming layer is 30° or more and 75° or less.

12. A method for producing a recorded matter having a three-dimensional image, comprising the steps of: adding, to a recording medium including a substrate and a foaming layer being provided on the substrate and containing a foaming material which foams with heat and a binder resin, a foam-promoting liquid containing a foam-promoting component which reduces a foaming start temperature of the foaming material and water; andheating the foaming layer of the recording medium to which the foam-promoting liquid is added to cause the foaming material to foam, forming a three-dimensional image, whereina contact angle of water to a surface of the foaming layer 30 seconds after the water is brought into contact with the surface of the foaming layer is 30° or more and 80° or less, anda ratio of a diameter of a water droplet 30 seconds after the water is brought into contact with the surface of the foaming layer to a diameter of the water droplet 0.01 seconds after the water is brought into contact with the surface of the foaming layer is 1.3 times or less.

13. The method for producing a recorded matter having a three-dimensional image according to claim 12, wherein the foam-promoting component is at least one selected from the group consisting of 2-pyrrolidone, dimethyl sulfoxide, N,N-dimethylformamide, and N-methyl-2-pyrrolidone.

14. The method for producing a recorded matter having a three-dimensional image according to claim 12, wherein the foam-promoting liquid is an aqueous foam-promoting liquid containing water.

15. The method for producing a recorded matter having a three-dimensional image according to claim 12, wherein the contact angle of water to a surface of the foaming layer 30 seconds after the water is brought into contact with the surface of the foaming layer is 30° or more and 75° or less.