Granted Patent B2

US 12,722,357 · App. 17/508,394 · Granted Sep 1, 2026

Inventors: Shiori Chonan (Kanagawa, JP); Satoshi Kamiwaki (Kanagawa, JP)

Assignee: FUJIFILM Business Innovation Corp.

B32B7/12B31D1/00B32B37/10B32B37/24B41M7/0027B42D15/02B42D15/04C09J125/14C09J133/08B32B2307/4023B32B2309/12B41M2205/40

Abstract

Claims (20)

1 . A printed material comprising:

a recording medium having a pressure-bonding surface including an image portion and a pressure phase transition layer, the recording medium being folded upon itself and pressure-bonded; or

a recording medium having a pressure-bonding surface including an image portion and a pressure phase transition layer and an additional recording medium, the recording medium and the additional recording medium being stacked and pressure-bonded together,

wherein, before the recording medium is folded upon itself and pressure-bonded or before the recording medium and the additional recording medium are stacked and pressure-bonded together, an average thickness of the pressure phase transition layer on the image portion of the pressure-bonding surface of the recording medium is larger than an average thickness of the pressure phase transition layer on a non-image portion of the pressure-bonding surface of the recording medium,

wherein the printed material comprises a portion where a thickness of the pressure phase transition layer on the image portion is greater than a thickness of the pressure phase transition layer in another portion of the printed material, and

wherein a thickness of the image portion in the portion of the printed material is greater than a thickness of the image portion in the another portion of the printed material.

2 . The printed material according to claim 1 , wherein the average thickness of the pressure phase transition layer on the image portion is from 0.5 μm to 5.0 μm inclusive,

wherein the average thickness of the image portion is more than 0 μm and 5.0 μm or less, and

wherein, when the thickness BR of the image portion is 0.5 μm or less, the following formulas (1) to (3) are satisfied:

AR=X 1× BR+Y 1;  formula (1):

2≤ X 1≤10; and  formula (2):

0.5≤ Y 1≤2  formula (3):

wherein AR is the thickness in micrometers of the pressure phase transition layer on the image portion; BR is the thickness in micrometers of the image portion; and the thicknesses represented by AR and BR are the thickness of the pressure phase transition layer directly above the image portion and the thickness of the image portion directly below the pressure phase transition layer whose thickness is determined, respectively.

3 . The printed material according to claim 1 , wherein coverage of the image portion with the pressure phase transition layer thereon is from 60% to 100% inclusive.

4 . The printed material according to claim 3 , wherein coverage of the non-image portion with the pressure phase transition layer thereon is from 10% to 60% inclusive.

5 . The printed material according to claim 1 , wherein the image portion is a toner image portion.

6 . The printed material according to claim 1 , wherein the pressure phase transition layer contains: a styrene-based resin containing styrene and an additional vinyl monomer as polymerization components; and a (meth)acrylate-based resin containing at least two (meth)acrylates as polymerization components such that the mass percentage of the (meth)acrylates with respect to the total mass of the polymerization components of the (meth)acrylate-based resin is 90% by mass or more, the pressure phase transition layer having at least two glass transition temperatures, and

wherein, among the glass transition temperatures of the pressure phase transition layer, the difference between the lowest glass transition temperature and the highest glass transition temperature is 30° C. or more.

7 . The printed material according to claim 6 , wherein the mass percentage of the styrene with respect to the total mass of the polymerization components of the styrene-based resin is from 60% by mass to 95% by mass inclusive.

8 . The printed material according to claim 6 , wherein the mass ratio of two (meth)acrylates with the highest mass percentages among the at least two (meth)acrylates included as the polymerization components of the (meth)acrylate-based resin is 80:20 to 20:80.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (13)