Short-process processing technology for polyester-cotton fabrics with high whiteness and high iron-free properties

Abstract

The invention discloses a short-process processing technology for polyester-cotton fabric with high whiteness and high iron-free property, which belongs to the technical field of textile printing and dyeing. The technical scheme is: adopting the following processing flow: singeing → deboiling → chlorine bleaching → oxygen bleaching → mercerizing → liquid ammonia → polyester whitening and iron-free one-bath → cotton whitening → softening; wherein, in the polyester whitening and iron-free one-bath process, polyester whitening agent 1: 3-5g / L, polyester whitening agent 2: 2-4g / L, penetrant: 3-5g / L, resin: 80-120g / L, in the cotton whitening process, cotton whitening agent: 10-20g / L, penetrant: 3-5g / L; in the softening process, formaldehyde scavenger: 10-30g / L, penetrant: 2-5g / L, softener: 10-30g / L. The invention simplifies the process flow, saves production costs, improves production efficiency, and can better meet the needs of the current market while ensuring quality, and meets the needs of future polyester-cotton fabric printing and dyeing processing.

Description

Technical Field

[0001] The invention belongs to the technical field of textile printing and dyeing, and specifically relates to a short-process processing technology for polyester-cotton fabrics with high whiteness and high ironing resistance. Background Art

[0002] Polyester-cotton fabric, as a textile material that combines the high strength, abrasion resistance and wrinkle resistance of polyester fiber with the comfort and breathability of cotton fiber, has long been favored by consumers due to its unique comprehensive properties, such as good dry and wet elasticity, dimensional stability, low shrinkage, wrinkle resistance, easy washing and quick drying. This type of fabric is widely used in many fields such as clothing, home decoration and industrial products, and the market demand continues to be strong.

[0003] However, despite the huge market demand for polyester-cotton fabrics, their production costs and processing efficiency have become key factors restricting their market competitiveness. In the existing production and processing of polyester-cotton fabrics, in order to achieve the ideal whiteness effect and resin finishing, a series of complex and cumbersome printing and dyeing processes are required, including singeing → deboiling → chlorine bleaching → oxygen bleaching → mercerizing → liquid ammonia → polyester whitening → cotton whitening → iron-free → baking → baking and washing → softening. The process is complicated, which not only increases the cost, but also seriously affects the production efficiency. It does not meet the current market's low-cost requirements. It is an urgent problem to be solved and is not conducive to dyeing and finishing production and processing.

[0004] Simplifying the production and processing of polyester-cotton fabrics, reducing costs while maintaining product quality has become a technical problem that needs to be solved urgently in the industry. Therefore, developing a new technology that can maintain the original excellent properties of polyester-cotton fabrics while simplifying the production process and reducing energy consumption and costs is of great significance to improving the market competitiveness of polyester-cotton fabrics and promoting the sustainable development of the dyeing and finishing industry. Summary of the invention

[0005] The present invention provides a short-process processing technology for polyester-cotton fabrics with high whiteness and high iron-free properties, which simplifies the process flow, saves production costs, and improves production efficiency. While ensuring quality, it can not only better meet the needs of the current market, but also greatly improve the processing efficiency and meet the needs of future printing and dyeing processing of polyester-cotton fabrics.

[0006] The technical solution of the present invention is:

[0007] The short-process processing technology of polyester-cotton fabric with high whiteness and high iron-free property adopts the following processing flow: singeing → deboiling → chlorine bleaching → oxygen bleaching → mercerizing → liquid ammonia → polyester whitening and iron-free one-bath → cotton whitening → softening;

[0008] Among them, in the polyester whitening and ironing free one-bath process, polyester whitening agent 1: 3-5g / L, polyester whitening agent 2: 2-4g / L, penetrant: 3-5g / L, resin: 80-120g / L, fiber protection agent: 10-30g / L, softener: 20-40g / L, resin catalyst: 24-36g / L, the temperatures of the eight drying rooms are 115-125℃, 115-125℃, 145-155℃, 145-155℃, 155-165℃, 155-165℃, 185-195℃ and 185-195, and the baking time of each drying room is: 5-8s;

[0009] In the cotton whitening process, cotton whitening agent: 10-20g / L, penetrant: 3-5g / L, hydrogen peroxide stabilizer: 5g / L, hydrogen peroxide: 5-20g / L, mixed organic alkali: 10-20g / L, water washing, high temperature steaming;

[0010] In the softening process, the drying room temperature is: 120-140℃, the baking time is: 30-40s, the formaldehyde scavenger is: 10-30g / L, the penetrant is: 2-5g / L, the softener is: 10-30g / L, and the organic modified silicone oil polyemulsion softener has a good effect on improving the feel of polyester-cotton fabrics. Adding softener will make the fabric feel softer, the fabric is comfortable to wear, and has good moisture absorption.

[0011] Preferably, in the polyester whitening and non-ironing one-bath process, the polyester whitening agent 1 is EVB, a derivative of dicyanobenzene; and the polyester whitening agent 2 is ESR, a mixture of 1,2-diphenylene derivatives.

[0012] Preferably, in the polyester whitening and non-ironing one-bath process, the fiber protective agent is SF-P.

[0013] Preferably, the penetrant is SN-10 and the softener is EPS.

[0014] Preferably, in the one-bath polyester whitening and non-ironing process, the resin is CR-L3 and the resin catalyst is CT-3.

[0015] Preferably, in the cotton whitening process, the mixed organic base is ADR, the cotton whitening agent is PC, and the 1,2-stilbene derivative PC is used as the cotton whitening agent to further improve the whiteness of the fabric. The hydrogen peroxide stabilizer of the complex of organic carboxylate and special auxiliary agent can ensure that the hydrogen peroxide decomposes at a slower rate, while improving the whiteness and preventing the hydrogen peroxide from reacting too violently to cause strength loss. The polyethylene glycol ether derivative penetrant can reduce the surface tension of the fabric, which is beneficial for the auxiliary agent to penetrate into the fabric. The mixed organic base ADR does not affect the whiteness and can effectively remove formaldehyde, ensuring that the formaldehyde content of the finished product is below 15ppm.

[0016] Preferably, in the softening process, the formaldehyde scavenger is CFF, and the special compound CFF of urea, 2-imidazolidinone and aliphatic glycol can make the formaldehyde content of the fabric ≤15ppm, making the fabric green and environmentally friendly.

[0017] Preferably, in the cotton whitening process, the washing temperature is 30-50°C, the steamer temperature is 90-100°C, and the high-temperature steaming time is 2-3 minutes.

[0018] The selected high-efficiency polyester whitening agent dicyanobenzene derivative EVB color light tends to red and blue light; the mixture of 1,2-diphenyl derivatives ESR color light tends to green light. The two can be used together to effectively neutralize the yellow light on the surface of the fabric, which can greatly improve the whiteness of the fabric. The special non-ionic surfactant SN-10 can effectively reduce the surface tension of the fabric, so that various additives can better penetrate into the fiber. The polyethylene wax dispersion emulsion SF-P can protect the fiber under high temperature conditions and improve the wrinkle recovery angle of the fabric when used with resin; the polyether / epoxy modified silicone oil EPS can not only improve the feel of the fabric, but also improve the strength of the fabric under high temperature resin conditions, improve the wrinkling of the cloth surface, and improve the ironing resistance. The modified N-hydroxymethyl dihydroxyethylene urea resin CR-L3 is used together with the catalyst inorganic salt mixture CT-3. CT-3 can effectively catalyze the cross-linking reaction between the resin CR-L3 and the cellulose fiber, which has little effect on the strength and whiteness, so that the fabric can achieve a higher ironing resistance. Resin, softener and brightener are processed in one bath to greatly improve the whiteness of the fabric while taking into account the hand feel and high iron-free properties.

[0019] The wrinkle-free auxiliaries in the one-bath process of polyester whitening and wrinkle-free fabrics are as follows: the penetrant is a special non-ionic active agent SN-10, the resin is a modified N-hydroxymethyl dihydroxyethylene urea resin CR-L3, the resin catalyst is an inorganic salt mixture CT-3, the fiber protector is a polyethylene wax dispersed emulsion SF-P, and the softener is a polyether / epoxy modified silicone oil EPS processed in one bath. The use of a gradual drying room temperature helps the auxiliaries to better penetrate into the fiber. The short-process processing technology not only saves processes, but also enables polyester-cotton fabrics to achieve a higher whiteness and wrinkle-free properties.

[0020] Adding mixed organic base ADR in the cotton whitening process and using it together with high-efficiency cotton whitening agent 1,2-stilbene derivative PC and hydrogen peroxide can not only further improve the whiteness of the fabric, but also effectively wash away the residual formaldehyde on the fabric surface, so that the formaldehyde content of the finished fabric is lower than 15ppm, reflecting the concept of ecological environmental protection.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1) Compared with traditional production processes, it can save 3 processes, save costs and improve efficiency;

[0023] 2) After the fabric is treated with resin, the non-ironing property of the fabric reaches level 3.5, which improves the washability of the fabric;

[0024] 3) After the fabric is treated, the formaldehyde content is ≤15ppm, and the fabric is green and environmentally friendly;

[0025] 4) The whiteness of the fabric after treatment can reach 153-156, meeting the current customer demand for high whiteness. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. The raw materials and instruments used in the present invention are commercially available unless otherwise specified, and the processes adopt conventional processes unless otherwise specified.

[0027] The polyester brightener EVB was purchased from Shanghai Xinyong Textile Dyeing and Chemical Co., Ltd.;

[0028] The polyester brightener ESR was purchased from Shanghai Xinyong Textile Dyeing Co., Ltd.;

[0029] Penetrant SN-10 was purchased from Qingdao Haining Chemical Co., Ltd.;

[0030] Fiber protective agent SF-P was purchased from Zibo Lurui Fine Chemical Co., Ltd.;

[0031] Resin CR-L3 was purchased from Zibo Lurui Fine Chemical Co., Ltd.;

[0032] Softener EPS was purchased from Weifang Gaosheng Chemical Co., Ltd.;

[0033] Resin catalyst CT-3 was purchased from Zibo Lurui Fine Chemical Co., Ltd.;

[0034] Mixed organic base ADR was purchased from Jinan Shenghong New Material Technology Co., Ltd.;

[0035] Cotton whitening agent PC was purchased from Argo Chemicals Co., Ltd.;

[0036] The formaldehyde scavenger CFF was purchased from Tianjin Hongliyuan Industry and Trade Co., Ltd.;

[0037] The hydrogen peroxide stabilizer was purchased from Nantong Aoer Industry and Trade Co., Ltd.

[0038] Example 1

[0039] The short-process processing technology of polyester-cotton fabric with high whiteness and high iron-free property comprises the following steps:

[0040] Fabric: CVC45×T / C45×112×76×58 / 59, structure: plain weave;

[0041] The polyester-cotton yarn is used in the warp and weft directions through the processes of singeing → deboiling → chlorine bleaching → oxygen bleaching → mercerizing → liquid ammonia → polyester whitening and iron-free one-bath → cotton whitening → softening, and the iron-free polyester-cotton fabric can reach level 3.5;

[0042] 1) After the fabric is processed by singeing → deboiling → chlorine bleaching → oxygen bleaching → mercerizing → liquid ammonia, it is processed with polyester whitening and non-ironing in one bath;

[0043] 2) In the one-bath process of polyester whitening and free ironing, EVB: 3g / L, ESR: 4g / L, SN-10: 3g / L, CR-L3: 100g / L, SF-P: 30g / L, EPS: 20g / L, CT-3: 30g / L, high temperature baking, the baking time of each drying room is: 5s, and the baking room temperatures are: 120℃, 120℃, 150℃, 150℃, 160℃, 160℃, 190℃ and 190℃;

[0044] 3) In the cotton whitening process, PC: 15g / L, penetrant SN-10: 5g / L, hydrogen peroxide stabilizer: 5g / L, hydrogen peroxide: 15g / L, ADR: 20g / L, washing temperature: 50℃, 50℃, 50℃, 50℃, 50℃, 50℃, 40℃, 30℃, 30℃, steamer temperature: 98℃, high temperature steaming for 3min;

[0045] 4) In the softening process, the drying room temperature is 140℃, the baking time is 35s, the CFF is 30g / L, the penetrant SN-10 is 2g / L, and the softener EPS is 15g / L.

[0046] The tested indicators of the finished fabrics are as follows:

[0047] (1) Breaking strength: ASTM D5034-2009 American Standard Test Method for Elongation and Breaking Strength of Textiles, 46Lb in warp direction and 48Lb in weft direction;

[0048] (2) Tear strength: ASTM D1424-2009 American standard test method for tear strength of fabrics, 2Lb in warp direction and 3.1Lb in weft direction;

[0049] (3) Appearance after washing (ironing resistance), AATCC 124-2010 American Standard Vertical Washing Machine Test Method and Standard, 45°C, 5 washes and drying test method, level 3.5;

[0050] (4) Finished product whiteness: CIE whiteness test method, 156;

[0051] (5) Formaldehyde content, JIS L1041:2011 / 8.1.4 B water extraction method, 13 ppm.

[0052] Example 2

[0053] The short-process processing technology of polyester-cotton fabric with high whiteness and high iron-free property comprises the following steps:

[0054] Fabric: XG T / C45×T / C45×130×80×57 / 58 Structure: 6 ribs;

[0055] The polyester-cotton yarn is used in the warp and weft directions through singeing → deboiling → chlorine bleaching → oxygen bleaching → mercerizing → liquid ammonia → polyester whitening and iron-free one-bath → cotton whitening → softening, and the iron-free polyester-cotton fabric with an iron-free property of level 3.5 is obtained;

[0056] 1) The fabric is processed through singeing → deboiling → chlorine bleaching → oxygen bleaching → mercerizing → liquid ammonia → and then polyester whitening and ironing free one-bath processing;

[0057] 2) In the one-bath process of polyester whitening and free ironing, EVB: 4g / L, ESR: 3g / L, SN-10: 4g / L, CR-L3: 80g / L, SF-P: 20g / L, EPS: 30g / L, CT-3: 30g / L, high temperature baking, the baking time of each drying room is: 8s, the temperature of the drying room is: 115℃, 115℃, 145℃, 145℃, 155℃, 155℃, 185℃ and 185℃;

[0058] 3) In the cotton whitening process, PC: 20g / L, penetrant SN-10: 3g / L, hydrogen peroxide stabilizer: 5g / L, hydrogen peroxide: 5g / L, ADR: 15g / L, washing temperature: 50℃, 50℃, 50℃, 50℃, 50℃, 50℃, 40℃, 30℃, 30℃, steamer temperature: 90℃, high temperature steaming for 2min;

[0059] 4) In the softening process, the drying room temperature is 120℃; baking is 40s, CFF: 20g / L, penetrant SN-10: 3g / L, softener EPS: 10g / L.

[0060] The tested indicators of the finished fabrics are as follows:

[0061] (1) Breaking strength: ASTM D5034-2009 American Standard Test Method for Elongation and Breaking Strength of Textiles, 72Lb in warp direction and 50Lb in weft direction;

[0062] (2) Tear strength: ASTM D1424-2009 American standard test method for tear strength of fabrics, 5.8Lb in warp direction and 4.2Lb in weft direction;

[0063] (3) Appearance after washing (ironing resistance), AATCC 124-2010 American Standard Vertical Washing Machine Test Method and Standard, 45°C, 5 washes and drying test method, level 3.5;

[0064] (4) Finished product whiteness: CIE whiteness test method, 153;

[0065] (5) Formaldehyde content, JIS L1041:2011 / 8.1.4 B water extraction method, 12 ppm.

[0066] Example 3

[0067] The short-process processing technology of polyester-cotton fabric with high whiteness and high iron-free property comprises the following steps:

[0068] Fabric: CVC45×T / C45×130×80×60 / 61, structure: 3 / 1+1 / 3DB;

[0069] The polyester-cotton yarn is used in the warp and weft directions through the processes of singeing → deboiling → chlorine bleaching → oxygen bleaching → mercerizing → liquid ammonia → polyester whitening and iron-free one-bath → cotton whitening → softening, and the iron-free polyester-cotton fabric can reach level 3.5;

[0070] 1) After the fabric is processed by singeing → deboiling → chlorine bleaching → oxygen bleaching → mercerizing → liquid ammonia, it is processed with polyester whitening and non-ironing in one bath;

[0071] 2) In the one-bath process of polyester whitening and free ironing, SN-10: 5g / L, EVB: 5g / L, ESR: 2g / L, CR-L3: 120g / L, SF-P: 10g / L, EPS: 40g / L, CT-3: 36g / L, high temperature baking, the baking time of each drying room is: 7s, the baking room temperature: 125℃, 125℃, 155℃, 155℃, 165℃, 165℃, 195℃ and 195℃;

[0072] 3) In the cotton whitening process, PC: 10g / L, penetrant SN-10: 5g / L, hydrogen peroxide stabilizer: 5g / L, hydrogen peroxide: 20g / L, ADR: 10g / L, washing temperature: 50℃, 50℃, 50℃, 50℃, 50℃, 50℃, 40℃, 30℃, 30℃, steamer temperature: 100℃, high temperature steaming for 2min;

[0073] 4) In the softening process, the drying room temperature is 130℃; baking: 30s, CFF: 10g / L, penetrant SN-10: 5g / L, softener EPS: 30g / L.

[0074] The tested indicators of the finished fabrics are as follows:

[0075] (1) Breaking strength: ASTM D5034-2009 American Standard Test Method for Elongation and Breaking Strength of Textiles, 57Lb in warp direction and 38Lb in weft direction;

[0076] (2) Tear strength: ASTM D1424-2009 American standard test method for tear strength of fabrics, 3.3Lb in warp direction and 2.7Lb in weft direction;

[0077] (3) Appearance after washing (ironing resistance), AATCC 124-2010 American Standard Vertical Washing Machine Test Method and Standard, 45°C, 5 washes and drying test method, level 3.5;

[0078] (4) Finished product whiteness: CIE whiteness test method, 155;

[0079] (5) Formaldehyde content, JIS L1041:2011 / 8.1.4 B water extraction method, 12 ppm.

[0080] Comparative Example 1

[0081] The difference from Example 1 is that no brightener ESR is added in this comparative example, and the rest of the preparation process is the same as that of Example 1.

[0082] The same test method as in Example 1 was used, and the test indicators were as follows:

[0083] (1) Breaking strength: 45Lb in warp direction and 49Lb in weft direction;

[0084] (2) Tear strength: 2.1Lb in warp direction, 3.2Lb in weft direction;

[0085] (3) Appearance after washing (ironing resistance), drying test method after 5 washes, level 3.5;

[0086] (4) Finished product whiteness: 138;

[0087] (5) Formaldehyde content: 13 ppm.

[0088] In this comparative example, only the brightener EVB is added, which cannot effectively neutralize the yellow light in the fabric, resulting in a decrease in the whiteness of the fabric.

[0089] Comparative Example 2

[0090] The difference from Example 1 is that the resin CR-L3 is replaced by an equal amount of conventional resin CR-E, and the rest of the preparation process is the same as that of Example 1.

[0091] The same test method as in Example 1 was used, and the test indicators were as follows:

[0092] (1) Breaking strength: 42Lb in warp direction and 43Lb in weft direction;

[0093] (2) Tear strength: 1.8 Lb in warp direction, 2.7 Lb in weft direction;

[0094] (3) Appearance after washing (ironing resistance), drying test method after 5 washes, level 3.2;

[0095] (4) Finished product whiteness: 150;

[0096] (5) Formaldehyde content: 13 ppm.

[0097] Replacing resin CR-L3 with an equal amount of conventional resin CR-E will result in a certain difference in strength, and will also have an adverse effect on the ironing properties and whiteness of polyester-cotton fabrics.

[0098] Comparative Example 3

[0099] The difference from Example 1 is that the resin catalyst CT-3 is not added in this comparative example, and the rest of the preparation process is the same as that of Example 1.

[0100] The same test method as in Example 1 was used, and the test indicators were as follows:

[0101] (1) Breaking strength: 25Lb in warp direction and 30Lb in weft direction;

[0102] (2) Tear strength: 1.6Lb in warp direction, 2.0Lb in weft direction;

[0103] (3) Appearance after washing (ironing resistance), drying test method after 5 washes, level 2.5;

[0104] (4) Finished product whiteness: 130;

[0105] (5) Formaldehyde content: 14 ppm.

[0106] In Comparative Example 3, resin catalyst CT-3 was not added, which had an adverse effect on the strength, ironing resistance and whiteness of the polyester-cotton fabric.

[0107] Comparative Example 4

[0108] The difference from Example 1 is that no mixed organic base is added in this comparative example, and the rest of the preparation process is the same as that of Example 1.

[0109] The same test method as in Example 1 was used, and the test indicators were as follows:

[0110] (1) Breaking strength: 45Lb in warp direction and 48Lb in weft direction;

[0111] (2) Tear strength: 2.1Lb in warp direction, 3.2Lb in weft direction;

[0112] (3) Appearance after washing (ironing resistance), drying test method after 5 washes, level 3.5;

[0113] (4) Finished product whiteness: 155;

[0114] (5) Formaldehyde content: 37 ppm.

[0115] In this comparative example, ADR is not added, and the residual resin and free formaldehyde on the fabric cannot be effectively washed away during the washing process, resulting in a high formaldehyde content in the fabric.

Claims

1. A short-process processing technology for polyester-cotton fabrics with high whiteness and high iron-free properties, characterized in that: The following processing procedures are adopted: singeing → deboiling → chlorine bleaching → oxygen bleaching → mercerizing → liquid ammonia → polyester whitening and ironing-free one-bath → cotton whitening → softening; Among them, in the polyester whitening and ironing free one-bath process, polyester whitening agent 1: 3-5g / L, polyester whitening agent 2: 2-4g / L, penetrant: 3-5g / L, resin: 80-120g / L, fiber protection agent: 10-30g / L, softener: 20-40g / L, resin catalyst: 24-36g / L, the temperatures of the eight drying rooms are 115-125℃, 115-125℃, 145-155℃, 145-155℃, 155-165℃, 155-165℃, 185-195℃ and 185-195, and the baking time of each drying room is: 5-8s; In the cotton whitening process, cotton whitening agent: 10-20g / L, penetrant: 3-5g / L, hydrogen peroxide stabilizer: 5g / L, hydrogen peroxide: 5-20g / L, mixed organic alkali: 10-20g / L, water washing, high temperature steaming; In the softening process, the drying room temperature is 120-140℃, the baking time is 30-40s, the formaldehyde capture agent is 10-30g / L, the penetrant is 2-5g / L, and the softener is 10-30g / L. In the one-bath process of polyester whitening and non-ironing, the resin is CR-L3 and the resin catalyst is CT-3; In the polyester whitening and non-ironing one-bath process, polyester whitening agent 1 is EVB, a derivative of dicyanobenzene; polyester whitening agent 2 is ESR, a mixture of 1,2-diphenylene derivatives; In the cotton whitening process, the mixed organic base is ADR and the cotton whitening agent is PC.

2. The short-process processing technology for high whiteness and high iron-free polyester-cotton fabric according to claim 1 is characterized in that: In the one-bath polyester whitening and non-ironing process, the fiber protective agent is SF-P.

3. The short-process processing technology for high whiteness and high iron-free polyester-cotton fabric according to claim 1 is characterized in that: The penetrants are all SN-10 and the softeners are all EPS.

4. The short-process processing technology for high whiteness and high iron-free polyester-cotton fabric according to claim 1 is characterized in that: In the softening process, the formaldehyde scavenger is CFF.

5. The short-process processing technology for high whiteness and high iron-free polyester-cotton fabric according to claim 1 is characterized in that: In the cotton whitening process, the washing temperature is 30-50℃, the steamer temperature is 90-100℃, and the high-temperature steaming time is 2-3min.