US-20260125850-A1 - Pretreatment Liquid For Textile Printing And Textile Printing Method

Abstract

A pretreatment liquid for textile printing according to the embodiment of the present disclosure includes a polyester resin (A) obtained by subjecting an alcohol component and a carboxylic acid component to polycondensation, a crosslinking agent, and water, in which the carboxylic acid component contains phthalic acid, an acid value of the polyester resin (A) is 5 to 40 mgKOH/g, an aromatic ring concentration of the polyester resin (A) is 4.20 to 5.20 mol/kg, and a glass transition temperature of the polyester resin (A) is 0° C. to 40° C.

Inventors

• Toshiaki Oguchi
• Kazuki SHIMURA
• Yuta ASAKAWA

Assignees

• SEIKO EPSON CORPORATION

Dates

Publication Date

20260507

Application Date

20251031

Priority Date

20241101

Claims (8)

1. 1 . A pretreatment liquid for textile printing, comprising: a polyester resin (A) obtained by subjecting an alcohol component and a carboxylic acid component to polycondensation; a crosslinking agent; and water, wherein the carboxylic acid component contains phthalic acid, an acid value of the polyester resin (A) is 5 to 40 mgKOH/g, an aromatic ring concentration of the polyester resin (A) is 4.20 to 5.20 mol/kg, and a glass transition temperature of the polyester resin (A) is 0° C. to 40° C.
2. 2 . The pretreatment liquid for textile printing according to claim 1 , wherein a peak top molecular weight of the polyester resin (A) is 3,000 to 20,000.
3. 3 . The pretreatment liquid for textile printing according to claim 1 , wherein a hydroxyl value of the polyester resin (A) is 0 to 40 mgKOH/g.
4. 4 . The pretreatment liquid for textile printing according to claim 1 , wherein the carboxylic acid component further contains isophthalic acid, and a molar ratio (phthalic acid:isophthalic acid) of the phthalic acid to the isophthalic acid is 1:99 to 99:1.
5. 5 . The pretreatment liquid for textile printing according to claim 1 , further comprising: one or more selected from a glycol-based solvent or a glycerol derivative as an organic solvent.
6. 6 . The pretreatment liquid for textile printing according to claim 1 , further comprising: a viscosity modifier.
7. 7 . The pretreatment liquid for textile printing according to claim 1 , wherein a content of the polyester resin (A) is 1% by mass or more and 20% by mass or less in terms of solid content with respect to a total amount of the pretreatment liquid for textile printing.
8. 8 . A textile printing method, comprising: applying the pretreatment liquid for textile printing according to claim 1 onto a fabric; drying the fabric to which the pretreatment liquid for textile printing is applied by heating; recording by jetting an ink composition containing a disperse dye and water from an ink jet head to apply the ink composition to an intermediate transfer medium; and transferring the ink composition applied to the intermediate transfer medium onto the fabric to which the pretreatment liquid for textile printing is applied.

Description

The present application is based on, and claims priority from JP Application Serial Number 2024-192735, filed Nov. 1, 2024, the disclosure of which is hereby incorporated by reference herein in its entirety. BACKGROUND 1. Technical Field The present disclosure relates to a pretreatment liquid for textile printing and a textile printing method. 2. Related Art Conventionally, a technology in which, when a fabric is dyed with a coloring material to manufacture a printed matter, the fabric is subjected to a pretreatment by using a treatment liquid containing a resin to improve the color development property, wash fastness, and the like of the printed matter, is known, and various studies are made on the resin contained in the treatment liquid. For example, JP-A-2011-099125 discloses a polyester resin aqueous dispersion in which a polyester resin is micro-dispersed in an aqueous medium. In addition, JP-A-2009-249773 discloses a pretreatment liquid consisting of an aqueous composition containing a resin, for applying to a polyester fabric. However, it is difficult to obtain satisfactory levels in all of color fastness to change and fading, fabric hand, and wash fastness of the textile printed matter. SUMMARY An aspect of a pretreatment liquid for textile printing according to the present disclosure includes a polyester resin (A) obtained by subjecting an alcohol component and a carboxylic acid component to polycondensation, a crosslinking agent, and water, in which the carboxylic acid component contains phthalic acid, an acid value of the polyester resin (A) is 5 to 40 mgKOH/g, an aromatic ring concentration of the polyester resin (A) is 4.20 to 5.20 mol/kg, and a glass transition temperature of the polyester resin (A) is 0° C. to 40° C. An aspect of a textile printing method according to the present disclosure includes applying the pretreatment liquid for textile printing according to the above-described aspect onto a fabric, drying the fabric to which the pretreatment liquid for textile printing is applied by heating, recording by jetting an ink composition containing a disperse dye and water from an ink jet head to apply the ink composition to an intermediate transfer medium, and transferring the ink composition applied to the intermediate transfer medium onto the fabric to which the pretreatment liquid for textile printing is applied. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is Table 1 showing compositions and evaluation results of pretreatment liquid for textile printing according to each example. FIG. 2 is Table 2 showing compositions of polyester resins used in each example. DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present disclosure will be described. The embodiments described below describe examples of the present disclosure. The present disclosure is not limited to the following embodiments, and includes various modifications implemented within a range not changing a gist of the present disclosure. It should be noted that not all of the configurations described below are essential configurations of the present disclosure. In the present specification, a numerical range indicated by using “to” means a range including numerical values described before and after “to” as a lower limit value and an upper limit value. 1. PRETREATMENT LIQUID FOR TEXTILE PRINTING A pretreatment liquid for textile printing according to the embodiment of the present disclosure includes a polyester resin (A) obtained by subjecting an alcohol component and a carboxylic acid component to polycondensation, a crosslinking agent, and water, in which the carboxylic acid component contains phthalic acid, an acid value of the polyester resin (A) is 5 to 40 mgKOH/g, an aromatic ring concentration of the polyester resin (A) is 4.20 to 5.20 mol/kg, and a glass transition temperature of the polyester resin (A) is 0° C. to 40° C. When the aromatic ring concentration in the polyester resin is increased, an interaction with an aromatic ring structure that the disperse dye contained in the ink composition may have is enhanced, and the color fastness to change and fading and the wash fastness of the textile printed matter are improved. On the other hand, when the aromatic ring concentration is increased, the glass transition temperature of the polyester resin is increased because of the increased rigidity of the molecular chain, and the resin is solidified, which deteriorates the fabric hand. As described above, conventionally, it is difficult to achieve both the color fastness to change and fading and the wash fastness of the textile printed matter and the fabric hand of the textile printed matter. As a result of intensive studies, it is found that, by using phthalic acid (orthophthalic acid) having low molecular symmetry as a carboxylic acid component in the polyester resin, even when the aromatic ring concentration is increased, the increase in rigidity of the molecular chain is reduced, that is, the increase in the glass tran