Fluorine-free unidirectional moisture management finishing process for woven fabrics

Abstract

The fluorine-free one-way wetting finishing process of woven fabric comprises the following steps: pretreatment, dyeing / whitening, printing, baking, tentering and preshrinking; wherein: the printing process has the following parameters: pattern coverage 45-75%, speed 40-50 m / min, magnetic force 40-50% and magnetic bar 8# / 10#. The working solution of the printing process comprises the following raw materials: fluorine-free waterproofing agent, waterproofing crosslinking agent, thickening agent and water. The dosing steps of the printing working solution are as follows: first, add the thickening agent, then add softened water and stir uniformly, then add the waterproofing agent, and finally add the waterproofing crosslinking agent; the application solves the problem that the fluorine-free waterproofing agent is difficult to process one-way wetting on woven fabric, and the process is simple and eco-friendly.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of textiles, and particularly relates to a fluorine-free one-way moisture transfer finishing process for woven fabrics. BACKGROUND

[0002] At present, people pay more and more attention to the functional connotation of clothing. After a hot environment or a lot of exercise, the skin will sweat a lot. If the sweat is not quickly discharged, it will cause the skin to appear sticky in the process of accumulation, as if the clothes are stuck to the body. The sweat is attracted by the clothes, which may further increase the weight of the clothes, causing more serious discomfort. In order to reduce the moisture content of the skin side, ensure the transmission of water vapor, improve the comfort of wearing, realize the point hydrophobic performance of the fabric surface, and make the fabric obtain excellent one-way moisture transfer function, the current one-way moisture transfer finished fabric uses fluorine-containing water-repellent agent for finishing. Due to the high bond energy of C-F bond, the fluorine-containing water-repellent agent can significantly reduce the surface free energy of the textile, and show superior water-repellent performance in one-way moisture transfer finishing. However, the fluorine-containing water-repellent agent has physiological toxicity and environmental degradation problems, and basically contains PFOA, PFOS and other substances. These substances will accumulate in the environment for a long time, and have poor environmental performance. More importantly, they have been proven to have negative effects such as carcinogenicity, and have been banned by the U.S. Environmental Protection Agency (EPA) and others.

[0003] Patent CN114836996A discloses a preparation method of a fabric with one-way moisture transfer and waterproof and stain-proof double functions, comprising the following steps: (1) fabric weaving: weaving a multi-layer fabric with one-way moisture transfer function, the fabric comprising inner layer water-repellent fibers and outer layer hydrophilic or moisture transfer fibers; (2) selective printing: selectively coating a slurry containing a waterproof additive on the outer layer of the fabric to form a waterproof coating, leaving a micro window channel with micropores or grooves; and drying and curing after forming the waterproof coating. This technical process is complex, including the weaving of multi-layer fabric, the selective coating of waterproof additive, and many restrictions on the base fabric and additive, and does not have universality.

[0004] In the existing one-way moisture transfer technology, a large amount of fluorine-containing materials are used, which is harmful to the environment, and it is difficult to realize one-way moisture transfer in the form of printing on woven fabrics. Therefore, it is urgent to develop a fluorine-free one-way moisture transfer finishing process for woven fabrics. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application aims to provide a fluorine-free one-way moisture transfer finishing process for woven fabrics, which is simple in process and eco-friendly.

[0006] The fluorine-free one-way moisture transfer finishing process for woven fabrics according to the present application comprises the following procedures:

[0007] Pretreatment -> dyeing / whitening -> printing -> baking -> stretching -> preshrinking;

[0008] wherein:

[0009] The printing process: pattern coverage: 45-75%, speed: 40-50 m / min, magnetic force: 40-50%, magnetic bar: 8# / 10#.

[0010] The working solution of the printing process comprises the following raw materials by mass fraction:

[0011]

[0012] The dosing step of the working solution of the printing process is: first add thickening agent, then add water and stir uniformly, and then add waterproofing auxiliary agent and waterproofing crosslinking agent in sequence.

[0013] The printing process: oven temperature: 130-140℃.

[0014] The baking process: oven temperature: 140-160℃, baking time: 40-120s, air volume: 70-80%.

[0015] The tentering process: functional auxiliary agent HSD: 30-50g / L.

[0016] The tentering process: oven temperature: 130-140℃.

[0017] The tentering process: baking time: 24-40s.

[0018] The functional auxiliary agent is a compounded emulsion of hydrophilic polymer and polysiloxane.

[0019] The waterproofing auxiliary agent is a bio-based fluorine-free waterproofing auxiliary agent.

[0020] The pretreatment is in sequence singeing, desizing, oxygen bleaching, mercerization.

[0021] The pretreatment is in sequence singeing, desizing, special bleaching, wet cloth drying.

[0022] The dyeing is pad dry dyeing with simultaneous dyeing and fixation.

[0023] The simultaneous dyeing and fixation is reduction simultaneous dyeing and fixation or active simultaneous dyeing and fixation.

[0024] (1a) The pretreatment of the fluorine-free unidirectional moisture management finishing process of the woven fabric, preferred scheme one:

[0025] Singeing: flame intensity: 10-20mbar, singeing mode: through singeing / normal singeing, speed: 80-120m / min;

[0026] Cold pad: caustic soda NaOH: 30-50g / L, H2O2: 9-15g / L, cold pad chelating finishing agent MAG: 15-18g / L, stacking time: 24h;

[0027] Water scouring: caustic soda NaOH: 20-50 g / L, refining agent CRC: 5-7 g / L, penetrating agent ZFC: 6-8 g / L, chelating agent SQ-A: 4-5 g / L, dewaxing agent SA-U: 4-5 g / L, steaming temperature: 100°C, padding time: 10-25 min, speed: 50-70 m / min;

[0028] Mercerizing: caustic soda NaOH: 160-300 g / L, concentrated alkali temperature: 50-55°C, dilute alkali temperature: 80-85°C, stable zone temperature: 85-90°C, speed: 70-80 m / min;

[0029] Dry setting: speed: 30-50 m / min, oven temperature: 180-200°C;

[0030] (1b) The pre-treatment of the woven fabric for the fluorine-free unidirectional moisture management finishing process, preferred solution two:

[0031] Singeing: flame intensity: 20 mbar, singeing method: direct singeing, speed: 120 m / min;

[0032] Desizing: desizing enzyme OPT-280: 4 g / L, penetrating agent MRZ: 5 g / L, refining enzyme 601 L conc: 2 g / L, extracting agent RED: 4 g / L, steaming temperature: 100°C, padding time: 15 min, speed: 70 m / min;

[0033] Scouring: caustic soda: 20 g / L, refining agent CRC: 6 g / L, penetrating agent MRZ: 6 g / L, chelating agent SQ-A: 4 g / L, dewaxing agent SA-U: 5 g / L, steaming temperature: 100°C, padding time: 25 min, speed: 70 m / min;

[0034] Dry setting: speed: 50 m / min, oven temperature: 180°C;

[0035] Oxygen bleaching: NaOH: 1 g / L, H2O2: 10 g / L, SQ-A: 10 g / L, WA-X: 6 g / L, OUR-266: 7 g / L, steaming temperature: 100°C, padding time: 25 min, speed: 60 m / min.

[0036] (1c) The pre-treatment of the woven fabric for the fluorine-free unidirectional moisture management finishing process, preferred solution three:

[0037] Singeing: flame intensity: 20 mbar, singeing method: through singeing, speed: 100 m / min;

[0038] Cold pad: caustic soda NaOH: 45g / L, H2O2: 13g / L, cold pad chelating finishing agent MAG: 16g / L, stacking time: 24h;

[0039] Water washing scouring: caustic soda NaOH: 45g / L, refining agent CRC: 4g / L, penetrating agent ZFC: 6g / L, chelating agent SQ-A: 4g / L, dewaxing agent SA-U: 5g / L, steaming box temperature: 100℃, cloth stacking time: 25min, speed: 50m / min;

[0040] Mercerizing: caustic soda NaOH: 219g / L, concentrated alkali temperature: 50℃, dilute alkali zone temperature: 85℃, stable zone temperature: 90℃, speed: 70m / min.

[0041] Compared with the prior art, the present application has the following beneficial effects:

[0042] (1) The present application provides a fluorine-free unidirectional moisture transfer finishing process for woven fabrics, which meets the requirements of environmental protection and green, healthy and sustainable development.

[0043] (2) The preferred fluorine-free waterproofing agent ZELAN R3 is made of renewable raw materials extracted from plants, about 60% of which are renewable resources, and is safe and environmentally friendly.

[0044] (3) Since woven fabrics are more compact and thinner than knitted fabrics, the diffusion capacity of sweat or moisture is limited, and unidirectional moisture transfer printing is more difficult, the development of unidirectional moisture transfer textiles for woven fabrics is still a market blank. This technology mainly relies on rotary screen printing machines to realize single-sided treatment of the fabric, so that the front and back of the fabric form a hydrophobic-hydrophilic wetting gradient, also known as differential capillary effect, thereby ensuring the unidirectional transmission of moisture or sweat - from the inner layer (intimate layer) of the fabric to the outer layer (non-intimate layer, diffusion layer) of the fabric, and the moisture or sweat in the outer layer is difficult to penetrate back to the inner layer. Unidirectional moisture transfer textiles not only have excellent moisture absorption and quick drying effect, but also can ensure the dryness and cleanliness of the human microenvironment.

[0045] (4) The fluorine-free unidirectional moisture transfer finishing process for woven fabrics of the present application has simple steps and mild conditions, and is suitable for market promotion. DETAILED DESCRIPTION

[0046] The present application provides a kind of woven fabric fluorine-free one-way wet finishing process, and those skilled in the art can learn from the content herein, and appropriately improve process parameters to realize.It is particularly pointed out that all similar substitutions and changes are obvious to those skilled in the art, and they all belong to the scope protected by the present application.The preparation method of the present application has been described by preferred embodiments, and relevant personnel can obviously modify and appropriately change and combine the preparation method of the present application without departing from the content, spirit and scope of the present application, to realize and apply the present application technology.In order to further illustrate the present application, the following examples are described in detail.

[0047] The following examples, the auxiliary used in the comparative example is from normal purchase, as shown in Table 1.

[0048] Table 1 reagent

[0049]

[0050]

[0051] Example 1

[0052] The fabric uses cotton elastic, and the specification is CM100 / 3*FFT20 (105D)*146*70*55 / 56, and the fabric organization is 3 / 1Z;

[0053] The fluorine-free one-way wet finishing process of the woven fabric is as follows:

[0054] Grey fabric→singeing→cold stacking→washing and scouring→mercerization→dry setting→dyeing→printing→baking→tentering→pre-shrinking;

[0055] Among them:

[0056] Singeing: flame intensity: 16 mbar, singeing mode: normal singeing, speed: 100 m / min;

[0057] Cold stacking: caustic soda NaOH: 45 g / L, H2O2: 13 g / L, chelating finishing agent MAG: 16 g / L, stacking time: 24 h;

[0058] Water washing and scouring: caustic soda NaOH: 45 g / L, refining agent CRC: 4 g / L, penetrating agent ZFC: 6 g / L, chelating agent SQ-A: 4 g / L, dewaxing agent SA-U: 5 g / L, steaming box temperature: 100℃, cloth stacking time: 25 min, speed: 50 m / min;

[0059] Mercerization: caustic soda NaOH: 256 g / L, concentrated alkali temperature: 50℃, dilute alkali zone temperature: 85℃, stable zone temperature: 90℃, speed: 70 m / min;

[0060] Dry setting: machine speed: 35m / min, drying oven temperature: 195℃;

[0061] Staining: Reduction staining was used; Staining prescription: B-RBS (FB) 5.6 g / L, Y.2G 3.5 g / L, R.FBB (YC): 2.5 g / L;

[0062] Printing: ZELAN R3 (15%), EXTENDER SFB (1.5%), LAMBCOL L491 (7%), add the thickener first, then add softened water and stir well, then add the ZELAN R3, and finally add the LAMBCOL L491; Rotary screen mesh: 125 mesh; Dot pattern, 68% pattern coverage; Printing speed: 40m / min; Magnetism: 50%; Magnetic rod: #10; Drying oven temperature: 140℃.

[0063] Baking: Vehicle speed: 75m / min, drying room temperature: 150℃, air volume: 70%; baking time: 120s;

[0064] Stretching: Functional additive HSD: 30g / L, drying oven temperature 140℃, baking time 36s;

[0065] Pre-shrinkage: Speed: 60m / min, Blanket temperature: 110℃, Rubber blanket temperature: 100℃, Tension: 0.3Bar, Roll gap: 10mm.

[0066] Example 2

[0067] The fabric is made of modal-covered polyester filament, with the following specifications: MODAL50(P20D)*MODAL50(P20D)*145*90*55 / 56, and the fabric structure is 2 / 2Z.

[0068] The specific steps of the fluorine-free unidirectional moisture-wicking finishing process for the woven fabric are as follows:

[0069] Greige fabric → singeing → desizing → scouring → dry setting → oxygen bleaching → dyeing → printing → baking → stretching → pre-shrinking;

[0070] in:

[0071] Singeing: Flame intensity: 20mbar, Singeing method: direct burning, Vehicle speed: 120m / min;

[0072] Desizing: Desizing enzyme OPT-280: 4g / L, penetrant MRZ: 5g / L, refining enzyme 601Lconc: 2g / L, extractant RED: 4g / L, steam oven temperature: 100℃, fabric stacking time: 15min, machine speed: 70m / min;

[0073] Scouring: Soda: 20g / L, Refining agent CRC: 6g / L, Penetrant MRZ: 6g / L, Chelating agent SQ-A: 4g / L, Dewaxing agent SA-U: 5g / L, Steaming temperature: 100℃, Pile time: 25min, Speed: 70m / min;

[0074] Dry setting: Speed: 50m / min, Oven temperature: 180℃;

[0075] Oxygen bleaching: NaOH: 1g / L, H2O2: 10g / L, SQ-A: 10g / L, WA-X: 6g / L, OUR-266: 7g / L, Steaming temperature: 100℃, Pile time: 25min, Speed: 60m / min.

[0076] Dyeing: Reactive long dyeing was used; the dyeing prescription was: R.BF-2B 0.048g / L, Yellow CL-S 0.048g / L, BE-BR 0.71g / L;

[0077] Printing: Fluorine-free waterproof assistant ZELAN R3: 13%, Waterproof crosslinking agent EXTENDER SFB: 1.3%, Thickening agent LAMBICOL L491: 6%, The thickening agent was added first, then the softening water was added and stirred uniformly, then the waterproof assistant was added, and finally the waterproof crosslinking agent was added; Round net mesh number: 125 meshes; The honeycomb pattern was used for the pattern, and the pattern coverage was 65%; Speed: 40m / min, Magnetic force: 40%, Magnetic rod: 8#, Oven temperature: 140℃;

[0078] Curing: Speed: 70m / min, Oven temperature: 150℃, Air volume: 70%; Curing time: 120s;

[0079] Tentering: Functional assistant HSD: 50g / L, Oven temperature 140℃, Curing time 30s;

[0080] Pre-shrinking: Speed: 60m / min, Wool blanket temperature: 110℃, Rubber blanket temperature: 100℃, Tension: 0.3Bar, Nip: 10mm.

[0081] Example 3

[0082] Fabric pure cotton, specification: CPT80 / 2*CPT80 / 2*150*115*59 / 60, fabric weave: 2 / 2Z;

[0083] The specific steps of the fluorine-free one-way moisture management finishing process of the woven fabric are as follows:

[0084] Grey fabric→singeing→cold pile→washing scouring→mercerizing→dyeing→printing→curing→softening→pre-shrinking;

[0085] Among them:

[0086] Singeing: Flame intensity: 20 mbar, singeing method: through singeing, speed: 100 m / min;

[0087] Cold pad-batch: Caustic soda NaOH: 45 g / L, H2O2: 13 g / L, chelating finishing agent MAG: 16 g / L, pad time: 24 h;

[0088] Water washing scouring: caustic soda NaOH: 45 g / L, refining agent CRC: 4 g / L, penetrating agent ZFC: 6 g / L, chelating agent SQ-A: 4 g / L, dewaxing agent SA-U: 5 g / L, steaming temperature: 100 ℃, pad time: 25 min, speed: 50 m / min;

[0089] Mercerizing: caustic soda NaOH: 219 g / L, concentrated alkali temperature: 50 ℃, dilute alkali temperature: 85 ℃, stable zone temperature: 90 ℃, speed: 70 m / min;

[0090] Dyeing: cold dyeing method was used; dyeing formula: OC-3R 6.7 g / L, R.BF-2B 1.3 g / L;

[0091] Printing: no-fluorine water-proofing assistant ZELAN R3: 15%, water-proofing cross-linking agent EXTENDER SFB: 1.5%, thickening agent LAMBICOL L491: 7%, first add thickening agent, then add softening water and stir uniformly, then add water-proofing assistant, and finally add water-proofing cross-linking agent; round screen mesh: 125 meshes; star star pattern was used, and the pattern coverage was 61%; speed: 40 m / min, magnetic force: 40%, magnetic bar: 10#, drying oven temperature: 140 ℃;

[0092] Curing: speed: 70 m / min, drying oven temperature: 150 ℃, air volume: 80%; curing time: 120;

[0093] Tentering: functional assistant HSD: 50 g / L, drying oven temperature: 140 ℃, curing time: 30 s;

[0094] Pre-shrinking: speed: 60 m / min, felt temperature: 110 ℃, rubber blanket temperature: 100 ℃, tension: 0.3 Bar, nip: 8 mm.

[0095] Comparative Example 1

[0096] The same as Example 1, the no-fluorine water-proofing assistant ZELAN R3 in printing was replaced by no-fluorine water-proofing assistant WELGUARD WR-7000, and the finished product was prepared.

[0097] Comparative Example 2

[0098] The same as example 2, the functional assistant HSD in the tentering process is replaced by MAS to produce the finished product.

[0099] Comparative example 3

[0100] The same as example 3, the magnetic bar in the printing process is adjusted from 10# to 12# to produce the finished product.

[0101] The finished products produced by the above examples and comparative examples are subjected to the liquid moisture management properties of the fabric, and the detection standard is AATCC 195-2009, and the detection results are shown in the following table.

[0102] Table 2 detection results

[0103]

[0104] From the above experiments and tables, it can be seen that in comparative example 1, the fluorine-free waterproofing agent is adjusted from R3 to WR-7000, and because the compatibility of WR-7000 with the thickening system is not good, the comprehensive moisture transfer and quick drying ability of the fabric is poor. In comparative example 2, the functional assistant HSD in the tentering process is replaced by the water-absorbing softener MAS, which greatly affects the performance of the fluorine-free waterproofing agent, resulting in poor comprehensive moisture transfer and quick drying ability of the fabric. In comparative example 3, the magnetic bar during printing is adjusted from 10# to 12#, which will cause the waterproofing agent to penetrate to the other side of the fabric, the water absorption of the moisture transfer and hydrophilic surface is poor, and the comprehensive moisture transfer and quick drying ability of the fabric is poor. Therefore, the woven one-way moisture transfer fabric produced by the woven fabric one-way moisture transfer finishing process of the application has higher comprehensive moisture transfer and quick drying ability, stronger wash resistance and longer lasting effect than the fabric of the same finishing method without using the technology.

Claims

1. A process for the non-fluorinated unidirectional moisture management finish of a woven fabric, characterized in that, Comprise the following processes: Pretreatment→dyeing / whitening→printing→baking→tentering→pre-shrinking; Wherein: The printing process: pattern coverage: 45~75%, speed: 40~50m / min, magnetic force: 40~50%, magnetic bar: 8# / 10#; The working solution of the printing process comprises the following raw materials by mass fraction: Bio-based fluorine-free waterproofing agent ZELAN R3 10~15%; Waterproof crosslinking agent 1~1.5%; Thickening agent 6~8%; Water balance; The tentering process: functional additives: 30~50g / L; The functional additive is a compounded emulsion of hydrophilic polymer and polysiloxane HSD; The thickening agent is LAMBICOL L491.

2. A process for the non-fluorine based unidirectional moisture management finish of woven fabrics as claimed in claim 1, wherein, The dosing step of the working solution of the printing process is: first add the thickening agent, then add water and stir uniformly, and then add the fluorine-free waterproofing agent and the waterproof crosslinking agent in sequence.

3. A process for the non-fluorine based unidirectional moisture management finish of woven fabrics as claimed in claim 1, wherein, The printing process: oven temperature: 130~140℃.

4. The process for non-fluorine based uni-directional moisture management finish of woven fabric as claimed in claim 1 wherein, The baking process: oven temperature 140~160℃, baking time 40~120s, air volume 70~80%.

5. The process for non-fluorine based unidirectional moisture management finish of woven fabric as claimed in claim 1 wherein, The tentering process: oven temperature 130~140℃.

6. The process for non-fluorine based unidirectional moisture management finish of woven fabric as claimed in claim 5 wherein, The tentering process: baking time 24~40s.

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