Pretreating agent to improve the effect of ink-jet printing on polyester fabric and its application

Abstract

The present invention provides a novel pretreating agent to improve the effect of ink-jet printing on polyester fabric and its application, and this invention belongs to the field of digital ink-jet printing. Stirring the dispersing agent, which includes many procedures of wetting agent and deionized water in a stirrer, adding nano-porous oxide dispersoid. Furthermore, keep stirring for 30 min and put the mixture in a sand mill to grinded for 2 h, then nano-porous oxide dispersoid is eventually got. The nano-porous oxide dispersoid work as pretreating agent, which used in the polyester fabric, is treated like pretreating agent during the padding process. By applying this technique into double-sided permeation ink-jet printing and direct-injection ink-jet printing, its pattern's definition, color depth and color saturation could be remarkable enhanced. This method has many advantages such as the craft is easy to handle as well as the operation is simplified, it is also suitable for batch production of the polyester fabric.

Claims

1. A polyester fabric pretreating agent, comprising 10-50 wt % nano-porous oxide dispersoid, 1-4 wt % antistatic agent, 1-5 wt % thickening agent, 1-5 wt % wetting agent, and water; wherein the polyester fabric pretreating agent is configured to facilitate ink migration from one side of a fabric to another side of the fabric and to prevent ink from spreading; and wherein the antistatic agent is a non-ionic surface-active agent or anion surfactant.

2. The polyester fabric pretreating agent of claim 1, wherein the nano-porous oxide dispersoid is in an amount of 10-20 wt %, the antistatic agent is in an amount of 1-2 wt %, the thickening agent is in an amount of 2-5 wt %, and the wetting agent is in an amount of 3-5 wt %.

3. The polyester fabric pretreating agent of claim 1, wherein the thickener is a nonionic thickener.

4. The polyester fabric pretreating agent of claim 1, wherein the wetting agent is an anionic dispersant comprising one or more of sodium dodecyl benzene sulfonate (SDBS), sodium (C16-)alkylsulfonate, sodium (C18-)alkylsulfonate, alkylphenol polyoxyethylene ether sodium sulfate, alkyl polyoxyethylene ether carboxylate, or alkyl sodium sulfonate.

5. A polyester fabric pretreating agent, comprising 10-50 wt % nano-porous oxide dispersoid, 1-4 wt % antistatic agent, 1-5 wt % thickening agent, 1-5 wt % wetting agent, and water; wherein the pretreating agent is configured to prevent ink migration from one side of a fabric to another side of the fabric and to prevent ink from spreading beyond a target printing area; wherein the antistatic agent comprises an amine salt; or wherein the antistatic agent comprises an amine oxide.

6. The polyester fabric pretreating agent of claim 5, wherein the thickener is a nonionic thickener.

7. The polyester fabric pretreating agent of claim 5, wherein the nano-porous oxide dispersoid is in an amount of 30-40 wt %, the antistatic agent is in an amount of 2 wt %, the thickening agent is in an amount of 2-3 wt % and the wetting agent is in an amount of 2-3 wt %.

Description

DETAILED DESCRIPTION

(1) Materials and Methods:

(2) Measuring Method:

(3) (1) Definition Test

(4) The printed line width was set 1 mm on printing machine, a metallographic video microscope was used to shoot the printed line at magnification of 50. Using the software of ToupView to test the width of printed line's maximum permeate place.

(5) (2) Test the Ratio of K/S

(6) The fabric's pattern was measured by blendent test machine computer CI7800, in the CIE Lab system, testing both sides of fabric's K/S and C* at the condition of D65 illuminant and 10 angle of view. Each sample was measured 3 times and calculated the average value.

(7) (3) Permeate Ratio Test

(8) The blendent test machine computer C17800 were used to measure the both side of fabric's K/S, using the following formula to calculate the Permeate ratio:

(9) $\mathrm{permeate}=\frac{B}{F}100\%B--\mathrm{the}\mathrm{back}\mathrm{side}\mathrm{of}\mathrm{the}\mathrm{fabric}sK/S;F--\mathrm{the}\mathrm{facade}\mathrm{side}\mathrm{of}\mathrm{fabric}sK/S$

(10) (4) Antistatic Test

(11) The electrostatic pressure and its half-life period of the samples before and after the treatment were respectively tested by inductive static determinator (YG(B)342D). The test condition: environment temperature is 37 C., relative humidity is 58%.

(12) (5) Fabric's Breaking Strength Test

(13) The breaking strength of the samples before and after the treatment were tested respectively by YG(B)026D-250 type electronic.

Example 1

(14) 110 g/m.sup.2 warp-knitted polyester fabric was selected as sample, employing the process as follows:

(15) (1) Preparation of the nano-porous silicon dioxide dispersion: 12 g TMN-6, 2 g SDBS, 146 g deionized water, mix and stir the above materials evenly in a stirrer, adding 40 g nano-porous silicon dioxide, keep stirring for 30 min, put the mixture in a sand mill and grinded for 2 h; then nano-porous silicon dioxide dispersoid that contain 20% nano-porous silicon dioxide and the average size<200 nm was got;

(16) (2) Preparation of the pretreating solution: 20 g nano-porous silicon dioxide dispersoid, 4 g antistatic agent Z-25, 10 g polyving akohol, 6 g SDBS, 160 g deionized water, stir the above materials in a stirrer and its speed is 800-1000 r/min, keep stirring for 30 min, then the fabric pretreating solution was got;

(17) (3) Padding pretreating solution: the polyester fabric was dipped into the pretreating bath, and squeezed with 60-100% liquid rate;

(18) (4) Pre-dried and baking: the fabric was pre-dried at 60 C. and followed by 200 C. baking;

(19) (5) Ink-jet printing: the water-based disperse dyes ink was used to printing under the condition of 720540 dpi and 3 Pass;

(20) (6) Sublimation and fixation: sublimation and fixation at 180 C. for 1 min.

(21) TABLE-US-00001 TABLE 1 The properties of fabric before and after the treatment Fabric Width/ Pros and Permeation- Electrostatic Half Breaking Samples direction mm cons K/S C* ratio/% pressure/V life/s strength/N Untreated Wale 1.48 facade 5.19 34.23 95.8 725 2.13 403 Course 1.23 back 4.97 33.68 776 Treated Wale 1.23 facade 9.25 35.40 83.2 577 0.89 412 Course 1.05 bake 7.70 34.69 769

(22) Table 1 showed that the properties of fabric before and after the treatment. It can be found that although the permeation ratio of fabrics reduced, the color of fabric front is similar to fabric back. The definition, colour depth, colour saturation and of antistatic ability pretreated fabrics were improved compared with untreated fabrics, while their breaking strength barely changed.

Example 2

(23) 180 g/m.sup.2 warp-knitted polyester fabric was selected as sample, employing the process as follows:

(24) (1) Preparation of the nano-porous silicon dioxide dispersion: 12 g TMN-6, 2 g SDBS, 146 g deionized water, mix and stir the above materials evenly in a stirrer, add 40 g nano-porous silicon dioxide, keep stirring for 30 min, put the mixture in a sand mill and grinded for 2 h; then the nano-porous silicon dioxide dispersoid that contain 20% nano-porous silicon dioxide and the average size<200 nm was got;

(25) (2) Preparation of the pretrating solution: 40 g nano-porous silicon dioxide dispersoid, 4 g antistatic agent Z-25, 4 g polyving akohol, 6 g SDBS, 146 g deionized water, stir the above materials in a stirrer and its speed is 800-1000 r/min, keep stirring for 30 min, then the pretrating solution was got;

(26) (3) Padding pretrating solution: the polyester fabric was dipped into the pretreating bath, and squeezed with 60-100% liquid rate;

(27) (4) Pre-dried and baking: the fabric was pre-dried at 60 C. and followed by 200 C. baking;

(28) (5) Ink-jet printing: the water-based disperse dyes ink was used to printing under the condition of 720540 dpi and 3 Pass;

(29) (6) Sublimation and fixation: sublimation and fixation at 180 C. for 1 min.

(30) TABLE-US-00002 TABLE 2 The properties of fabric before and after the treatment Fabric Width/ Pros and Permeation Electrostatic Half-life Breaking Samples direction mm cons K/S C* ration/% pressure/V period/s strength/N Untreated Wale 1.37 facade 3.92 31.75 84.2 882 1.49 433 Course 1.14 back 3.30 33.00 1228 Treated Wale 1.08 facade 4.40 35.79 76.9 575 0.83 434 Course 1.06 bake 3.46 34.35 1230

(31) Table 2 showed that the properties of fabric before and after the treatment. It can be found that although the permeation ratio of fabrics reduced, the color of fabric front is similar to fabric back. The definition, colour depth, colour saturation and of antistatic ability pretreated fabrics were improved compared with untreated fabrics, while their breaking strength barely changed.

Example 3

(32) 110 g/m.sup.2 warp-knitted polyester fabric was selected as sample, employing the process as follows:

(33) (1) Preparation of the pretreating solution: 4 g antistatic agent Z-25, 10 g polyving akohol, 6 g SDBS, 180 g deionized water, mix and stir the above materials in a stirrer, revolving speed 800-1000 r/min, keep stirring for 30 min, then the pretreating solution was got;

(34) (2) Padding pretreating solution: the polyester fabric was dipped into the pretreating bath, and squeezed with 60-100% liquid rate;

(35) (3) Pre-dried and baking: the fabric was pre-dried at 60 C. and followed by 200 C. baking;

(36) (4) Ink-jet printing: the water-based disperse dyes ink was used to printing under the condition of 720540 dpi and 3 Pass;

(37) (5) Sublimation and fixation: sublimation and fixation at 180 C. for 1 min.

(38) TABLE-US-00003 TABLE 3 The properties of fabric before and after the treatment Fabric Width/ Pros and Permeation Electrostatic Half-life Breaking samples direction mm cons K/S C* ration/% pressure/V period/s strength/N Untreated Wale 1.48 facade 5.19 34.23 95.8 725 2.13 403 Course 1.23 back 4.97 33.68 776 Treated Wale 1.50 facade 5.65 33.26 68.5 714 1.98 398 Course 1.21 bake 2.87 32.56 764

(39) Table 3 showed that the properties of fabric before and after the treatment. It can be found the permeation ratio of pretreated fabrics was reduced, and the pattern colour of pros and cons excited a huge difference compared with example 1 due to not adding nano-porous silicon dioxide dispersion. The fabric patterns' definition, colour depth, colour saturation, antistatic ability, breaking strength was not obviously improved.

Example 4

(40) 230 g/m.sup.2 warp-knitted polyester fabric was selected as sample, employing the process as follows:

(41) (1) Preparation of the nano-porous silicon dioxide dispersion: 12 g EPTMAC, 0.4 g Tween 60, 146 g deionized water, mix and stir the above materials in a stirrer, adding 40 g nano-porous silicon dioxide, keep stirring for 30 min, put the mixture in a sand mill and grinded for 2 h; then the nano-porous silicon dioxide dispersoid that contain 20% nano-porous silicon dioxide and the average size<200 nm was got;

(42) (2) Preparation of the pretreating solution: 40 g nano-porous silicon dioxide dispersoid, 4 g antistatic agent TM, 4 g urethane-urea thickener, 6 g Tween 60, 146 g deionized water, stir the above materials in a stirrer and its speed is 800-1000 r/min, keep stirring for 30 min, then the fabric pretreating solution was got;

(43) (3) Padding pretreating solution: the polyester fabric was dipped into the pretreating bath, and squeezed with 60-100% liquid rate;

(44) (4) Pre-dried and baking: the fabric was pre-dried at 60 C. and followed by 200 C. baking;

(45) (5) Ink-jet printing: the water-based disperse dyes ink was used to printing under the condition of 720540 dpi and 3 Pass;

(46) (6) Sublimation and fixation: sublimation and fixation at 180 C. for 1 min.

(47) TABLE-US-00004 TABLE 4 The properties of fabric before and after the treatment Fabric Width/ Electrostatic Half- Breaking K/S C* Samples direction mm pressure/V life/S strength/N M Y C K M Y C K Untreated Wale 1.52 764 2.52 794 9.22 9.51 8.74 10.46 55.54 67.44 36.76 8.45 Course 1.37 1398 Treated Wale 1.13 573 0.92 795 11.26 18.55 12.77 14.92 62.30 83.72 42.64 4.82 Course 1.02 1259

(48) As seen from the table 4, after the fabric was treated by pretreating solution, their definition and colour depth was improved obviously, the C* value of red, yellow and blue color were increased, their colour saturation was enhanced, the C* of black color was decreased, which means the colour of fabric surface was more purity. After the fabrics were treated by pretreating solution, their antistatic ability was enhanced, while its breaking strength barely changed.

Example 5

(49) 230 g/m.sup.2 warp-knitted polyester fabric was selected as sample, employing the process as followed:

(50) (1) Preparation of the nano-porous silicon dioxide dispersion: 12 g EPTMAC, 0.4 g Tween 60, 146 g deionized water, mix and stir the above materials in a stirrer, adding 40 g nano-porous silicon dioxide, keep stirring for 30 min, put the mixture in a sand mill and grinded for 2 h; then the nano-porous silicon dioxide dispersoid that contain 20% nano-porous silicon dioxide and the average size<200 nm was got;

(51) (2) Preparation of the pretreating solution: 80 g nano-porous silicon dioxide dispersoid, 4 g antistatic agent TM, 6 g urethane-urea thickener, 6 g Tween 60, 104 g deionized water, stir the above materials in a stirrer, revolving speed 800-1000 r/min, keep stirring for 30 min, then the fabric spreadhead was got;

(52) (3) Padding pretreating solution: the polyester fabric was dipped into the pretreating bath, and squeezed with 60-100% liquid rate;

(53) (4) Pre-dried and baking: the fabric was pre-dried at 60 C. and followed by 200 C. baking;

(54) (5) Ink-jet printing: the water-based disperse dyes ink was used to printing under the condition of 720540 dpi and 3 Pass;

(55) (6) Sublimation and fixation: sublimation and fixation at 180 C. for 1 min.

(56) TABLE-US-00005 TABLE 5 The properties of fabric before and after the treatment Fabrics Width/ Electrostatic Half- Breaking K/S C* Samples direction mm pressure/V life/S strength/N M Y C K M Y C K Untreated Wale 1.52 798 2.78 794 9.22 9.51 8.74 10.46 55.54 67.44 36.76 8.45 Course 1.37 1398 Treated Wale 1.21 564 0.76 783 11.62 18.35 11.09 15.36 59.78 79.35 41.20 5.18 lateral 1.09 1278

(57) As seen from the table 5, after the fabric was treated by the pretreating solution, their definition and colour depth was improved obviously, the C* of red, yellow and blue color were increased, their colour saturation was enhanced, the C* of black were decreased, which means the colour of fabric surface was more purity. After the fabrics were treated by pretreating solution, their antistatic ability was enhanced, while its breaking strength barely changed.

Example 6

(58) 230 g/m.sup.2 warp-knitted polyester fabric was selected as sample, employing the process as followed:

(59) (1) Preparation of the pretreating solution: 4 g antistatic agent TM, 4 g urethane-urea thickener, 6 g Tween 60, 186 g deionized water, mix and stir the above materials in a stirrer, revolving speed 800-1000 r/min, keep stirring for 30 min, then the fabric spreadhead was got;

(60) (2) Padding pretreating solution: the polyester fabric was dipped into the pretreating bath, and squeezed with 60-100% liquid rate;

(61) (3) Pre-dried and baking: the fabric was pre-dried at 60 C. and followed by 200 C. baking;

(62) (4) Ink-jet printing: the water-based disperse dyes ink was used to printing under the condition of 720540 dpi and 3 Pass;

(63) (5) Sublimation and fixation: sublimation and fixation at 180 C. for 1 min.

(64) TABLE-US-00006 TABLE 6 The properties of fabric before and after the treatment Fabrics Width/ Electrostatic Half- Breaking K/S C* Samples direction mm pressure/V life/S strength/N M Y C K M Y C K Untreated Wale 1.52 764 2.52 794 9.22 9.51 8.74 10.46 55.54 67.44 36.76 8.45 Course 1.37 1398 Treated Wale 1.13 735 2.32 789 9.03 10.76 9.04 11.21 56.43 65.42 35.98 7.86 Course 1.02 1318

(65) As seen from the table 6, compared with example 3, the pretreating solution didn't contain nano-porous silicon dioxide dispersoid, after the fabrics were treated by pretreating solution, its definition, colour depth, colour saturation and antistatic ability were barely improved.