Pretreatment liquid for water-based pigment textile printing and method for forming pattern on textile

Abstract

A pretreatment liquid for water-based pigment textile printing is disclosed, which includes: 1 wt % to 30 wt % of aqueous non-ionic polyurethane; 1 wt % to 20 wt % of a metal salt; 0.1 wt % to 10 wt % of a melamine resin; and the balance being a solvent. A method for forming a pattern on a textile using the aforesaid pretreatment liquid is also disclosed.

Claims

1. A pretreatment liquid for water-based pigment textile printing, comprising: 1 wt % to 30 wt % of aqueous non-ionic polyurethane; 1 wt % to 20 wt % of calcium chloride; 0.1 wt % to 10 wt % of a melamine resin; and a solvent.

2. The pretreatment liquid of claim 1, further comprising 0.01 wt % to 2 wt % of a wetting agent.

3. The pretreatment liquid of claim 1, wherein the aqueous non-ionic polyurethane is a polyol polyurethane water-based resin.

4. The pretreatment liquid of claim 1, wherein the melamine resin is a methyl-etherified high-imino melamine resin.

5. The pretreatment liquid of claim 1, wherein the melamine resin is a high-methyl-etherified melamine resin.

6. The pretreatment liquid of claim 1, wherein the solvent is water.

7. A method for forming a pattern on a textile, comprising: providing a textile and a pretreatment liquid for water-based pigment textile printing, wherein the pretreatment liquid comprises: 1 wt % to 30 wt % of aqueous non-ionic polyurethane; 1 wt % to 20 wt % of calcium chloride; 0.1 wt % to 10 wt % of a melamine resin; and a solvent; applying the pretreatment liquid to a predetermined region of the textile and proceeding with high temperature curing; and coating the predetermined region with a white paste or a color paste to form a white pattern or a color pattern.

8. The method of claim 7, wherein the high temperature curing is carried out between 130° C. and 165° C.

9. The method of claim 7, wherein the pretreatment liquid further comprises 0.01 wt % to 2 wt % of a wetting agent.

10. The method of claim 7, wherein the aqueous non-ionic polyurethane is a polyol polyurethane water-based resin.

11. The method of claim 7, wherein the melamine resin is a methyl-etherified high-imino melamine resin.

12. The method of claim 7, wherein the melamine resin is a high-methyl-etherified melamine resin.

13. The method of claim 7, wherein the solvent is water.

Description

DETAILED DESCRIPTION OF THE EMBODIMENT

(1) The following embodiments when read with the accompanying drawings are made to clearly exhibit the above-mentioned and other technical contents, features and/or effects of the present disclosure. Through the exposition by means of the specific embodiments, people would further understand the technical means and effects the present disclosure adopts to achieve the above-indicated objectives. Moreover, as the contents disclosed herein should be readily understood and can be implemented by a person skilled in the art, all equivalent changes or modifications which do not depart from the concept of the present disclosure should be encompassed by the appended claims.

(2) Unless specified otherwise, singular word “a” or “the” used in the present specification and claims includes one or plural referents.

(3) Unless specified otherwise, term “or” used in the present specification and claims includes meaning of “and/or”.

Test Example 1

(4) In the following examples and comparative examples of the present disclosure, the pretreatment liquids for water-based pigment textile printing of Examples 1 to 4 and Comparative Examples 1 to 5 were prepared according to the formulations in Table 1 below.

(5) TABLE-US-00001 TABLE 1 Comparative Comparative Comparative Comparative Comparative Example Example Example Example Example 1 Example 2 Example 3 Example 4 Example 5 1 2 3 4 Non-ionic — — — 10% polyurethane Permax ™ 232) Non-ionic polymer 10%   5% — — Printrite ™ 300 Styrene/acrylic — — 10% — copolymer (Mowinyl 6730) Calcium chloride —   5% — 10% Calcium nitrate 15% — 15% — tetrahydrate Cross-linking agent — — — — — 0.6% — — — Cymel 303 Cross-linking agent — — — — — — 1% — — Cymet 327 Cross-linking agent — — — — — — — 1% — Cymel 350 Cross-linking agent — — — — — — — 1.2% Cymel 385 Cross-linking agent — —  8% — 8% — PVA (1%) Wetting agent — 0.03% — — — — BYK347 Wetting agent — — 0.1% — — — BYK348 Wetting agent — — — 0.3% Silwet L-7280 Water The balance

(6) The prepared pretreatment liquids of Examples 1 to 4 and Comparative Examples 1 to 5 were applied manually or automatically to a 3/1 black cotton twill, and then subjected to high temperature curing between 130° C. and 165° C. and drying. Afterwards, the white ink (DuPont™ Artistri P5910 White DTG Ink) was sprayed onto the area coated with the pretreatment liquid by the APEX direct printing machine (EPSON DX5). The whiteness test, dry friction fastness test, wet friction fastness test and washing fastness test were performed after drying and color fixation.

(7) Whiteness Test

(8) The 3/1 black cotton twill coated with the white ink was subjected to Datacolor 400 color measurement. The color measurement data was the CIE whiteness value, and the light source was D65.

(9) Dry Friction Fastness Test (AATCC8)

(10) The “dry” black twill (same as the scratch cloth, 3/1 black cotton twill) was rubbed on the cloth printed with white ink back and forth for ten times. The rating is a comprehensive evaluation of both pollution (black cloth) and discoloration.

(11) Wet Friction Fastness Test (AATCC8)

(12) The “wet” black twill (the same as the scratch cloth, 3/1 black cotton twill) (being immersed in water to get wet, and then dried in a dehydrator for 2 minutes) was rubbed on the cloth printed with white ink back and forth for ten times. The rating is a comprehensive evaluation of both pollution (black cloth) and discoloration.

(13) Washing Fastness Test (AATCC3A)

(14) The formulation and steps for washing fastness test are as what follows: a) formulation of the soaping agent: 100 g H.sub.2O+0.15 g WOB. b) putting a cloth (5 cm×15 cm) and 106.7 g of steel beads (approximately 100 pieces) in each steel bottle, and adding 50 g of the aqueous soaping agent; washing at 70° C. for 45 minutes; and then washing the cloth clean and drying in an oven at 60° C.

(15) The test results of the whiteness test, dry friction fastness test, wet friction fastness test and washing fastness test were listed in Table 2 below.

(16) TABLE-US-00002 TABLE 2 Comparative Comparative Comparative Comparative Comparative Example Example Example Example Example 1 Example 2 Example 3 Example 4 Example 5 1 2 3 4 Whiteness CIE W >80 CIE W >80 CIE W >80 CIE W >80 (coating test) Dry friction 1-2 2 2 1-2 3-4 3-4 3-4 3-4 3-4 fastness (AATCC8) Wet friction 1-2 2 2 1-2 3-4 4 4 4 4 fastness (ANTCC8) Washing 1 1-2 1-2 1 1 5 4-5 4 3-4 fastness (AATCC3A)

(17) As shown in the results of Table 2 above, the pretreatment liquids of Comparative Examples 1 to 4 did not perform well on those fastness tests. Although the pretreatment liquid of Comparative Example 5 exhibited better dry friction fastness and wet friction fastness due to the use of a PVA cross-linking agent, the washing fastness was still not good. In contrast, the pretreatment liquids of Examples 1 to 4, when using the melamine resin as the cross-linking agent, can exhibit higher strength of crosslinking under high temperature curing (between 130° C. and 165° C.). It has excellent performance in not only whiteness but also the fastness tests, including washing fastness, dry friction fastness and wet friction fastness.

Test Example 2

(18) In this test example, the pretreatment liquid of Example 3 prepared in Test Example 1 and the DuPont pretreatment liquid P5100 were used for testing. In this test example, the jet printing conditions are the same as those described in Test Example 1, and will not be described again. The test results of the dry friction fastness test, wet friction fastness test and washing fastness test are listed in Table 3 below.

(19) TABLE-US-00003 TABLE 3 White ink DuPont ™ Artistri P5910 White DTG Ink. Pretreatment liquid P5100 (DuPont) Example 3 Dry friction fastness (AATCC8) 3 3-4 Wet friction fastness (AATCC8) 3-4 4 Washing fastness (AATCC3A) 4 4-5

(20) As shown in the results of Table 3 above, when the pretreatment liquid of Example 3 is used with DuPont ink, not only the whiteness is good, but also a sharper printed image can be obtained, and the fastness tests also performed better, compared with the DuPont pretreatment liquid.

Test Example 3

(21) In this test example, the pretreatment liquid of Example 3 prepared in Test Example 1 and the DuPont pretreatment liquid P5100 were used for testing. In this test example, the jet printing conditions were the same as those described in Test Example 1, except that DuPont ink was used in Test Example 1, whereas the white ink shown in Table 6 of Taiwan Patent Application No. 107115631 was used in this test example. The test results of the dry friction fastness test, wet friction fastness test and washing fastness test are listed in Table 4 below.

(22) TABLE-US-00004 TABLE 4 Pretreatment liquid Example 3 P5100 (DuPont) White ink The white ink of Taiwan Patent DuPont ™ Application No. Artistri P5910 107115631 White DTG Ink. Dry friction fastness (AATCC8) 5 3 Wet friction fastness (AATCC8) 4-5 3-4 Washing fastness (AATCC3A) 4 4

(23) As shown in the results of Table 4 above, when the pretreatment liquid of Example 3 is used with the white ink of Taiwan Patent Application No. 107115631, all the dry friction fastness test, wet friction fastness test, and washing fastness test have grade 4-5 performance.

Test Example 4

(24) In this test example, the pretreatment liquid of Example 3 prepared in Test Example 1 was used for testing. In this test example, the jet printing conditions are the same as those described in Test Example 1, except that Test Example 1 used 3/1 black cotton twill and DuPont white ink, whereas this test example used 3/1 white cotton twill and color ink DuPont P5910 Series.

(25) In this test example, after thermal curing, the difference in color strength was compared between the pigment-based inks formed using pretreatment liquid of Example 3 or not. Herein, the Integ value of the sample without the pretreatment liquid was set to 100%. The test results are listed in Table 5 below.

(26) TABLE-US-00005 TABLE 5 Pretreatment liquid of Example 3 Integ value Yellow 103.11 Magenta 110.19 Cyan 109.67 Black 115.70

(27) As shown in the results of Table 5 above, after the pigment-based ink was thermally cured, the Integ value was increased with the use of the pretreatment liquid of Example 3, which meant an increase in color strength. Simultaneously, under the use of the pretreatment liquid of Example 3, the pigment-based ink and fabrics had good fastness characteristics and color uniformity.

(28) In summary, when the pretreatment liquid for water-based pigment textile printing of the present disclosure is applied to dark fabrics, the ink fastness of white ink can be improved and the penetration of white ink can be prevented. In addition, when the pretreatment liquid for water-based pigment textile printing of the present disclosure is used on light-colored fabrics, the chroma and color uniformity of the pigment-based color ink can be improved.

(29) Although the present disclosure has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the disclosure as hereinafter claimed.