WO-2026094495-A1 - METHOD FOR PRODUCING LAMINATE, AND INKJET INK

WO2026094495A1WO 2026094495 A1WO2026094495 A1WO 2026094495A1WO-2026094495-A1

Abstract

Disclosed is a method for producing a laminate, the method including a step for recording an image by applying an inkjet ink containing a pigment onto a base material for image recording containing a polymer that comprises vinyl chloride as a constituent unit, by an inkjet recording system, and a step for laminating a base material for lamination containing a polymer that comprises vinyl chloride as a constituent unit on the image without interposing another layer therebetween, wherein the inkjet ink contains a polymerizable compound A which is a compound containing two or more (meth)acryloyl groups and a polymerizable compound B which is a compound containing one (meth)acryloyl group, and the content mass ratio (polymerizable compound A/polymerizable compound B) is 0.001-0.120. Also disclosed is an inkjet ink.

Inventors

SETO, Yuki
UMEBAYASHI, TSUTOMU
SHIRAKI, FUMIYA

Assignees

富士フイルム株式会社

Dates

Publication Date: 20260507
Application Date: 20250926
Priority Date: 20241029

Claims (8)

A process of recording an image by applying an inkjet ink containing a pigment to an image recording substrate containing a polymer with vinyl chloride as a constituent unit, using an inkjet recording method, The process involves laminating a laminating substrate containing a polymer with vinyl chloride as a constituent unit onto the aforementioned image without any other layers in between. Includes, The inkjet ink contains polymerizable compound A, which is a compound containing two or more (meth)acryloyl groups, and polymerizable compound B, which is a compound containing one (meth)acryloyl group, wherein the ratio of the mass content of polymerizable compound A to the mass content of polymerizable compound B in the inkjet ink is 0.001 to 0.120. A method for manufacturing laminated materials.
The method for producing a laminate according to claim 1, wherein the polymerizable compound A has a molecular weight of 145 to 2700 per (meth)acryloyl group.
The method for producing a laminate according to claim 1, wherein the total content of polymerizable compound A and polymerizable compound B is 45% by mass or more relative to the total amount of the inkjet ink.
The method for producing a laminate according to claim 1, wherein the polymerizable compound B contains a compound with a molecular weight of 190 or less, and the proportion of the compound with a molecular weight of 190 or less in the polymerizable compound B is 80% by mass or more.
The method for producing a laminate according to claim 1, wherein the inkjet ink further contains an N-vinyl compound.
The method for producing a laminate according to claim 5, wherein the ratio of the total content mass of polymerizable compound A and polymerizable compound B to the content mass of the N-vinyl compound in the inkjet ink is 1.1 to 7.0.
It contains polymerizable compound A, which is a compound containing two or more (meth)acryloyl groups; polymerizable compound B, which is a compound containing one (meth)acryloyl group; and an N-vinyl compound. The polymerizable compound A has a molecular weight of 145 to 2700 per (meth)acryloyl group. The polymerizable compound B includes compound B1, which is a compound with a molecular weight of 190 or less containing one (meth)acryloyl group, and the proportion of compound B1 in the polymerizable compound B is 80% by mass or more. The ratio of the mass content of polymerizable compound A to the mass content of polymerizable compound B is 0.001 to 0.120. The ratio of the total mass content of polymerizable compound A and polymerizable compound B to the mass content of the N-vinyl compound is 1.1 to 7.0. Inkjet ink.
The inkjet ink according to claim 7, wherein the total content of polymerizable compound A and polymerizable compound B is 45% by mass or more of the total amount of inkjet ink.

Description

Method for manufacturing laminated bodies and inkjet ink This disclosure relates to a method for manufacturing laminates and to inkjet inks. Conventionally, various studies have been conducted on technologies for manufacturing laminated materials using inkjet inks. For example, Patent Document 1 discloses an inkjet ink set comprising an inkjet colored ink and an inkjet clear ink, wherein the inkjet colored ink comprises an ultraviolet-curable monomer, a coloring pigment, and a photopolymerization initiator, and the inkjet clear ink comprises an ultraviolet-curable monomer, an ultraviolet-curable oligomer, and a photopolymerization initiator. Patent Document 1 further discloses the production of a printed material comprising a thermoplastic resin substrate (e.g., polyvinyl chloride resin), a colored ink layer, a clear ink layer, and a thermal laminate layer covering at least the clear ink layer, using this inkjet ink set. Furthermore, Patent Document 2 discloses a laminate comprising: a recording medium containing at least one of a urethane resin and a vinyl chloride resin; a colored image which is an inkjet record placed on the recording medium; a clear ink layer containing a vinyl chloride-vinyl acetate copolymer placed on at least the colored image on the recording medium; and a laminate substrate containing at least one of a urethane resin and a vinyl chloride resin which is heat-fused onto the clear ink layer. Patent Document 1: Japanese Unexamined Patent Publication No. 2023-157372 Patent Document 2: International Publication No. 2019/087807 This figure shows the character image used to evaluate image distortion caused by lamination in the example. In this specification, a numerical range indicated using "~" means a range that includes the numbers listed before and after "~" as the minimum and maximum values, respectively. In the numerical ranges described stepwise in this specification, the upper or lower limit stated in one numerical range may be replaced with the upper or lower limit of another numerical range described stepwise. Furthermore, in the numerical ranges described in this specification, the upper or lower limit stated in one numerical range may be replaced with the values shown in the examples. In this specification, the amount of each component in a composition means the total amount of multiple substances present in the composition, unless otherwise specified, if there are multiple substances corresponding to each component in the composition. In this specification, a combination of two or more preferred embodiments is a more preferred embodiment. In this specification, the term "process" includes not only independent processes but also processes that cannot be clearly distinguished from other processes, as long as their intended purpose is achieved. In this specification, "image" means any film formed by applying ink, and "image recording" means the formation of an image (i.e., a film). Furthermore, the concept of "image" as used herein also includes solid images. In this specification, The term "(meth)acryloyl group" is a concept that encompasses both acryloyl and methacryloyl groups. "(Meth)acrylate" is a concept that encompasses both acrylate and methacrylate. "(Meth)acrylic" is a concept that encompasses both acrylic and methacrylic. [Method for manufacturing laminated materials] The method for manufacturing the laminated body described herein is: A process for recording an image by applying an inkjet ink containing a pigment (hereinafter also simply referred to as "ink") to an image recording substrate containing a polymer with vinyl chloride as a constituent unit, using an inkjet recording method (hereinafter also referred to as the "image recording process"), The process involves laminating a laminate substrate containing a polymer with polyvinyl chloride as a constituent unit onto an image without any other layers in between (hereinafter also referred to as the "laminating process"), Includes, The ink contains polymerizable compound A, which is a compound containing two or more (meth)acryloyl groups, and polymerizable compound B, which is a compound containing one (meth)acryloyl group, and in the inkjet ink, the ratio of the mass content of polymerizable compound A to the mass content of polymerizable compound B is 0.001 to 0.120. This is a method for manufacturing laminated materials. As described above, the inventors' studies have revealed that when a laminate substrate containing a polymer containing vinyl chloride as a constituent unit is laminated onto an image recorded on an image recording substrate containing a polymer containing vinyl chloride as a constituent unit, without interposing another layer (e.g., a clear ink layer), image distortion due to lamination (i.e., image distortion due to heat during lamination) may occur, and/or the lamination strength of the resulting laminate (i.e., the peel strength between the image recording substrate and the laminate substrat