A kind of cotton double-layer quick-drying warm-keeping fabric and preparation method thereof

Abstract

The present invention relates to the technical field of fabrics, and in particular to a cotton double-layer quick-drying warm-keeping fabric and a preparation method thereof; the application discloses a double-layer fabric comprising spraying a phase change microcapsule finishing agent, a formaldehyde-free resin finishing agent, and a dry softener on the inner layer of the double-layer fabric, and spraying a far-infrared finishing agent and a hydrophilic softener on the outer layer of the double-layer fabric. The application obtains a fabric with quick-drying and warm-keeping functions by spraying additives with different functions on the front and back sides of the fabric in the fabric inlet area.

Description

Technical Field

[0001] The invention relates to the technical field of fabrics, and in particular to a pure cotton double-layer quick-drying warm-keeping fabric and a preparation method thereof. Background Art

[0002] Since all-cotton fabrics have good moisture absorption and breathability, the water exists in the fabric in two forms when absorbing moisture. One part is called free water, which exists in the pores of cotton fibers and is adsorbed on the surface of cotton fibers; the other part is called bound water. Since there are a large number of hydroxyl groups on cotton fibers, they will combine with water molecules in the form of hydrogen bonds after absorbing moisture. This part of bound water is relatively firmly bound and difficult to evaporate, making it difficult for all-cotton fabrics to dry as quickly as chemical fiber fabrics. On the other hand, although all-cotton clothing has good warmth retention, in the low temperature environment of winter, the warmth retention can generally only be improved by thickening and densifying the fabric or filling the middle of the fabric. This makes the clothing thicker and heavier, and it cannot achieve the warmth and lightness of down jackets.

[0003] In terms of quick-drying fabrics, the current method is generally to use hydrophilic softeners to improve the hydrophilicity of the fabric and its moisture absorption and diffusion properties, so that water can be quickly absorbed and diffused by the fabric, increasing the evaporation area to improve quick-drying, but this method has limited effect on quick-drying. Another solution is to add water-repellent yarn to the fabric. Although this method improves quick-drying, it reduces the water absorption of the fabric.

[0004] In terms of thermal insulation fabrics: most of the heat loss from the human body is in the form of radiation. To improve the thermal insulation without changing the material and structure of the fabric itself, the existing solution is to apply substances that can reflect far-infrared rays, such as titanium dioxide, magnesium powder, etc., to the fabric through a coating, thereby reducing the heat loss from the human body. However, the coating can only be applied on one side, and a thickener needs to be added to increase the viscosity. The fabric will feel harder after coating.

[0005] Therefore, it is necessary to propose a cotton double-layer quick-drying warm-keeping fabric with improved quick-drying and warmth-keeping properties of the cotton fabric and a preparation method thereof. Summary of the invention

[0006] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a pure cotton double-layer quick-drying and warm-keeping fabric and a preparation method thereof, by spraying additives with different functions on the front and back sides of the fabric in the fabric feeding area to obtain a fabric with quick-drying and warm-keeping functions.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] A pure cotton double-layer quick-drying warm fabric comprises a double-layer fabric in which a phase change microcapsule finishing agent, a formaldehyde-free resin finishing agent and a dry softener are sprayed on the inner layer of the double-layer fabric and a far-infrared finishing agent and a hydrophilic softener are sprayed on the outer layer of the double-layer fabric.

[0009] As a preferred solution, the microcapsule finishing agent is TEXSUN COOL-PCM.

[0010] As a preferred solution, the formaldehyde-free resin finishing agent is KNITTEX FFRC.

[0011] As a preferred solution, the dry softener is ULTRAPHIL HCT.

[0012] As a preferred solution, the far-infrared finishing agent is TEXSUN WARM-FIR.

[0013] As a preferred solution, the hydrophilic softener is ULTRATEX FMW.

[0014] As a preferred solution, the double-layer fabric is a double-layer pure cotton fabric.

[0015] The preparation method of the above-mentioned all-cotton double-layer quick-drying warm fabric comprises the following steps:

[0016] S1. Spraying and shaping

[0017] Feed the double-layer fabric into the fabric feeding area, spray the far-infrared finishing agent and hydrophilic softener on the outer layer of the double-layer fabric, and spray the phase change microcapsule finishing agent, formaldehyde-free resin finishing agent, and dry softener on the inner layer of the double-layer fabric; after the spraying is completed, dry it;

[0018] S2. Pre-shrinkage

[0019] After the fabric is dried in step S1, the fabric is pre-shrunk by a pre-shrinking machine to obtain a finished product.

[0020] As a preferred solution, in step S2, the shrinkage of the pre-shrunk fabric is controlled to be within a range of -3% to 0%.

[0021] As a preferred solution, in step S1, the drying temperature is 140-170°C.

[0022] In the present application, the far-infrared finishing agent and the hydrophilic softener are sprayed on the front side of the fabric, i.e. the outer layer of the double-layer fabric; and the phase change microcapsule finishing agent, the formaldehyde-free resin finishing agent and the dry softener are sprayed on the back side of the fabric, i.e. the inner layer of the double-layer fabric.

[0023] In the present invention, in terms of quick-drying performance: a formaldehyde-free resin finishing agent is applied to the inner layer of the double-layer fabric, i.e., the skin-contacting surface, because the formaldehyde-free resin finishing agent can cross-link with the hydroxyl groups on the cotton fibers, blocking some hydroxyl groups, thereby reducing the proportion of bound water after the cotton fabric absorbs moisture and improving quick-drying performance. A dry softener is applied to the inner layer of the double-layer fabric to maintain the hydrophilicity and dryness of the skin-contacting surface; a hydrophilic softener is applied to the outer layer to quickly absorb the moisture absorbed by the inner layer to the outer layer through the capillary effect, and diffuse and evaporate, thereby achieving a quick-drying effect.

[0024] In the present invention, in terms of thermal insulation performance: a phase change microcapsule finishing agent is applied to the inner layer of the double-layer fabric, i.e., the skin-contacting surface, and a n-alkane phase change material with a phase change temperature of 28°C to 31°C is encapsulated in a micro-nano capsule. When the temperature changes, the phase change material undergoes a solid-liquid transformation, thereby absorbing or releasing heat. The human body surface temperature is about 36°C. When wearing such clothes, the phase change material is in a liquid state. When entering a low-temperature environment, such as going from indoors to outdoors in winter, the outside temperature becomes lower and is lower than the phase change temperature. The phase change material on the clothes will change from liquid to solid, accompanied by heat release, thereby delaying the feeling of coldness brought to the human body by the low-temperature environment outside, and playing a certain role in warming. On the other hand, a far-infrared finishing agent is applied to the outer layer of the double-layer fabric to reflect the far-infrared rays radiated by the human body back to the human body, thereby reducing the heat loss of the human body and further enhancing the warming effect.

[0025] In terms of the preparation method, when spraying different additives on the outer layer of the double-layer fabric, the present invention uses the German WEKO turntable spraying equipment, which adopts a special structure of the spray disc automatic liquid feeding system and control system to extract the liquid from the liquid storage container, and feed it to each rotor on the rotor carrier after precise quantitative measurement by the flow controller. The rotation speed of the rotor is about 5000 rpm. The centrifugal force generated by the rotation forms the liquid into a flat spraying surface, and it is thrown toward the fabric in the form of extremely fine mist droplets, and the size of the droplets is only about 30 microns. Since the extremely fine mist particles formed have sufficient impulse, it can ensure that the extremely fine mist particles are sprayed between the fabric fibers. The present invention installs two sets of WEKO spray disc spraying equipment on the front and back sides of the fabric in the fabric feeding area of ​​the setting machine. During the flat-width uniform operation of the fabric, different functional additives are evenly sprayed on the front and back sides of the fabric.

[0026] Compared with the traditional feeding method, two coating processes are required to apply different additives on the front and back sides of the fabric, and thickeners need to be added to the coating slurry to increase the viscosity for easy coating processing, and the fabric will feel harder after coating. The present invention uses a one-step WEKO turntable spraying method to spray different additives on the front and back sides of the fabric, and no thickener needs to be added, and the fabric will not feel harder after processing.

[0027] The beneficial effects of the present invention are:

[0028] 1. The present invention installs two sets of WEKO spray disc spraying equipment on the front and back sides of the fabric in the fabric feeding area of ​​the setting machine. When the fabric runs at a uniform speed with a flat width, different functional additives are evenly sprayed on the front and back sides of the fabric, so as to obtain a quick-drying and warm fabric.

[0029] 2. By spraying different functional additives on the double layers of the fabric, the quick-drying and warm-keeping fabric obtained by the present invention meets the standard requirements in terms of moisture absorption, quick-drying and warmth retention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0031] Figure 1 It is a performance test result diagram of the fabrics prepared by Examples 1 to 3 and Comparative Examples 1 to 3 described in the present application. DETAILED DESCRIPTION

[0032] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments, and the contents mentioned in the implementation modes are not intended to limit the present invention.

[0033] As used herein, "and / or" includes the term of any and all combinations of one or more associated listed items. The terms used herein are only used to describe specific embodiments and are not intended to limit the present invention. As used herein, the singular forms "a", "an", "an" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise. It is further understood that "including", when used in this specification, specifies the stated features, integers, steps, operations, elements and / or compositions, but does not exclude the existence or addition of one or more other features, integers, steps, operations, elements, compositions and / or combinations thereof.

[0034] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the invention belongs. It is further understood that terms, such as defined in commonly used dictionaries, are interpreted in accordance with their meanings in the context of the relevant art and are not in an idealized or overly formal sense unless explicitly so defined herein.

[0035] The exemplary invention described herein may appropriately lack any one or more element limitations that are not specifically disclosed herein. Therefore, the terms "comprise", "include", "contain", etc. should be understood broadly and non-restrictively. In addition, the terminology used herein is used as a description, not a limitation, and it is unintentional to use these terminology expressions that do not include any equivalent characteristics, but only describe some of their characteristics, but various modifications are possible within the scope of the present invention according to the rights. Therefore, although the present invention has been specifically disclosed by preferred embodiments and optional features, the modifications disclosed herein to embody the changes of the present invention may be recorded by those skilled in the art, and such modifications and changes will be considered to be within the scope of the present invention.

[0036] The raw materials or reagents used in the examples of the present invention and the comparative examples are all purchased from mainstream manufacturers in the market. If the manufacturer is not specified or the concentration is not specified, they are all analytically pure raw materials or reagents that can be routinely obtained. As long as they can play the expected role, there is no special restriction. The instruments and equipment such as the cloth inspection machine and the desizing machine used in this embodiment are all purchased from major manufacturers in the market. As long as they can play the expected role, there is no special restriction. If the specific technology or conditions are not specified in this embodiment, the technology or conditions described in the literature in this field or the product instructions are followed.

[0037] Taking the woven twill double-layer yarn-dyed fabric 50S / 1X50S / 1 180X140 as an example, the process flow of the all-cotton double-layer quick-drying warm fabric from the grey fabric to the finished fabric is as follows:

[0038] Grey cloth inspection → singeing → desizing → mercerizing → WEKO turntable spraying and shaping → pre-shrinking → finished product inspection

[0039] in:

[0040] Grey fabric inspection:

[0041] Inspect the cotton grey fabric on the fabric inspection machine;

[0042] Singeing:

[0043] The cotton grey fabric is quickly passed through a singeing machine, which burns off the longer hairiness on the surface of the grey fabric to make the surface of the fabric smooth;

[0044] Desizing:

[0045] The fabric treated by the singeing step is treated in a desizing machine, and the size on the fabric is removed by the action of hot water and amylase in the desizing machine;

[0046] Mercerized:

[0047] Process conditions and parameters: vehicle speed 50-70m / min, rolling rate 65%-75%, caustic soda concentration: 200-220g / L, spraying: 5 suction 5 shower, rolling rate 55%-65%;

[0048] In the following Examples 1 to 3, the WEKO rotary disc spraying equipment is from WEKO, Germany;

[0049] The microcapsule finishing agent is TEXSUN COOL-PCM, and the content is 100-300g / L.

[0050] The formaldehyde-free resin finishing agent is KNITTEX FFRC, with a content of 80-150g / L.

[0051] The dry softener is ULTRAPHIL HCT, with a content of 20-60g / L.

[0052] The far-infrared finishing agent is TEXSUN WARM-FIR, and the content is 20-40g / L.

[0053] The hydrophilic softener is ULTRATEX FMW, and the content is 20-50g / L.

[0054] Example 1

[0055] A method for preparing a double-layer quick-drying warm cotton fabric comprises the following steps:

[0056] S1. Spraying and shaping

[0057] The double-layer fabric obtained through the grey fabric inspection → singeing → desizing → mercerizing treatment is fed into the fabric inlet area; that is, through the WEKO turntable spraying equipment (rotation speed of 5000rpm) installed in the fabric inlet area of ​​the setting machine, during the fabric flat-width uniform speed running process, 30g / L far-infrared finishing agent and 40g / L hydrophilic softener are sprayed on the outer layer of the double-layer cotton fabric with a speed of 50m / min; 200g / L phase change microcapsule finishing agent, 120g / L formaldehyde-free resin finishing agent, and 40g / L dry softener are sprayed on the inner layer of the double-layer cotton fabric with a speed of 50m / min;

[0058] After spraying, dry at 140℃;

[0059] S2. Pre-shrinkage

[0060] After the fabric is dried in step S1, the fabric is pre-shrunk by a pre-shrinking machine, and the shrinkage is controlled within a range of -3% to 0% to obtain a finished product.

[0061] Example 2

[0062] A method for preparing a double-layer quick-drying warm cotton fabric comprises the following steps:

[0063] S1. Spraying and shaping

[0064] The double-layer fabric obtained through the grey fabric inspection → singeing → desizing → mercerizing treatment is fed into the fabric inlet area; that is, through the WEKO turntable spraying equipment (rotation speed is 6000rpm) installed in the fabric inlet area of ​​the setting machine, during the fabric flat-width uniform speed running process, a far-infrared finishing agent with a content of 20g / L and a hydrophilic softener with a content of 20g / L are sprayed on the outer layer of the double-layer cotton fabric with a speed of 50m / min; a phase change microcapsule finishing agent with a content of 100g / L, a formaldehyde-free resin finishing agent with a content of 80g / L, and a dry softener with a content of 20g / L are sprayed on the inner layer of the double-layer cotton fabric with a speed of 50m / min;

[0065] After spraying, dry at 170℃;

[0066] S2. Pre-shrinkage

[0067] After the fabric is dried in step S1, the fabric is pre-shrunk by a pre-shrinking machine, and the shrinkage is controlled within a range of -3% to 0% to obtain a finished product.

[0068] Example 3

[0069] A method for preparing a double-layer quick-drying warm cotton fabric comprises the following steps:

[0070] S1. Spraying and shaping

[0071] The double-layer fabric obtained through the grey fabric inspection → singeing → desizing → mercerizing treatment is fed into the fabric inlet area; that is, through the WEKO turntable spraying equipment (rotation speed of 5500rpm) installed in the fabric inlet area of ​​the setting machine, during the fabric flat-width uniform speed running process, a far-infrared finishing agent with a content of 40g / L and a hydrophilic softener with a content of 50g / L are sprayed on the outer layer of the double-layer cotton fabric with a speed of 50m / min; a phase change microcapsule finishing agent with a content of 300g / L, a formaldehyde-free resin finishing agent with a content of 150g / L, and a dry softener with a content of 60g / L are sprayed on the inner layer of the double-layer cotton fabric with a speed of 50m / min;

[0072] After spraying, dry at 150℃;

[0073] S2. Pre-shrinkage

[0074] After the fabric is dried in step S1, the fabric is pre-shrunk by a pre-shrinking machine, and the shrinkage is controlled within a range of -3% to 0% to obtain a finished product.

[0075] Comparative Example 1

[0076] A method for preparing a double-layer quick-drying warm cotton fabric comprises the following steps:

[0077] By using the WEKO turntable spraying equipment installed in the fabric feeding area of ​​the setting machine, the outer layer of the double-layer fabric is sprayed with a hydrophilic softener, and the inner layer of the double-layer fabric is sprayed with a formaldehyde-free resin finishing agent and a dry softener while the fabric is running at a uniform speed with a flat width. The other conditions are the same as those in Example 1.

[0078] Comparative Example 2

[0079] That is, through the WEKO turntable spraying equipment installed in the cloth feeding area of ​​the setting machine, when the fabric is running at a uniform speed with a flat width, the outer layer of the double-layer fabric is sprayed with a far-infrared finishing agent and a hydrophilic softener, and the inner layer of the double-layer fabric is sprayed with a phase change microcapsule finishing agent and a dry softener. The other conditions are the same as those in Example 1.

[0080] Comparative Example 3

[0081] A method for preparing a double-layer quick-drying warm cotton fabric comprises the following steps:

[0082] Replace the original WEKO turntable spray shaping with ordinary stenter shaping:

[0083] Fabric treatment on a Monforts hot air stenter (double-sided dyeing):

[0084] The content is 50g / L of hydrophilic softener ULTRATEX FMW and the content is 3g / L of penetrant ERKANTOL NR;

[0085] The remaining conditions are the same as those in Example 1.

[0086] The finished fabrics prepared in Examples 1 to 3 and Comparative Examples 1 to 3 were tested for appearance quality and internal quality indicators; implementation standards: hygroscopicity in accordance with GB / T 21655.1-2008, quick-drying in accordance with GB / T 21655.1-2008, and thermal insulation performance in accordance with GB / T 30127-2013. The test results are summarized in Figure 1 .

[0087] like Figure 1 As shown, the finished fabrics prepared in Examples 1 to 3 have the following hygroscopic properties:

[0088] The water absorption rate (before washing) is 287-289%, which meets the standard requirements;

[0089] The water absorption rate (after washing) is 281-283%, which meets the standard requirements;

[0090] The drip diffusion time (before washing) is 1.7-1.8s, which meets the standard requirements;

[0091] The drip diffusion time (after washing) is 1.7-1.8s, which meets the standard requirements;

[0092] Wicking height (before washing) 160-162mm, in line with standard requirements;

[0093] Wicking height (after washing) 171-173mm, in line with standard requirements;

[0094] Quick-drying properties:

[0095] Evaporation rate (before washing) 0.2-0.22g / h, in line with standard requirements;

[0096] Evaporation rate (after washing) 0.2-0.22g / h, in line with standard requirements;

[0097] Moisture permeability (before washing) 10500-10600g / (㎡·d), in line with standard requirements;

[0098] Moisture permeability (after washing) 10500-10700g / (㎡·d), in line with standard requirements;

[0099] In terms of warmth retention:

[0100] The far infrared emissivity is 0.94-0.96, which meets the standard requirements;

[0101] The far-infrared radiation temperature rise is 2.7-2.8℃, which meets the standard requirements.

[0102] Comparative Example 1, after the pure cotton fabric is treated with the microcapsule finishing agent and the far-infrared finishing agent, the finished fabric is obtained:

[0103] In terms of hygroscopicity:

[0104] The water absorption rate (before washing) is 285%, which meets the standard requirements;

[0105] The water absorption rate (after washing) is 283%, which meets the standard requirements;

[0106] The drip diffusion time (before washing) is 1.6s, which meets the standard requirements;

[0107] The drip diffusion time (after washing) is 1.7s, which meets the standard requirements;

[0108] Wicking height (before washing) 165mm, in line with standard requirements;

[0109] The wicking height (after washing) is 171mm, which meets the standard requirements;

[0110] In terms of quick-drying:

[0111] Evaporation rate (before washing) 0.2g / h, in line with standard requirements;

[0112] Evaporation rate (after washing) 0.2g / h, in line with standard requirements;

[0113] Moisture permeability (before washing) 10600g / (㎡·d), in line with standard requirements;

[0114] Moisture permeability (after washing) 10500g / (㎡·d), in line with standard requirements;

[0115] In terms of warmth retention:

[0116] The far infrared emissivity is 0.84, which does not meet the standard requirements;

[0117] The far-infrared radiation temperature rise is 1.3℃, which does not meet the standard requirements.

[0118] Comparative Example 2, after the pure cotton fabric is treated without the formaldehyde-free resin finishing agent, the finished fabric obtained is:

[0119] In terms of hygroscopicity:

[0120] The water absorption rate (before washing) is 277%, which meets the standard requirements;

[0121] The water absorption rate (after washing) is 266%, which meets the standard requirements;

[0122] The drip diffusion time (before washing) is 1.8s, which meets the standard requirements;

[0123] The drip diffusion time (after washing) is 1.9s, which meets the standard requirements;

[0124] The wicking height (before washing) is 166mm, which meets the standard requirements;

[0125] Wicking height (after washing) 170mm, in line with standard requirements;

[0126] In terms of quick-drying:

[0127] The evaporation rate (before washing) is 0.15g / h, which does not meet the standard requirements;

[0128] The evaporation rate (after washing) is 0.14 / h, which does not meet the standard requirements;

[0129] The moisture permeability (before washing) is 8900g / (㎡·d), which does not meet the standard requirements;

[0130] The moisture permeability (after washing) is 9000g / (㎡·d), which does not meet the standard requirements;

[0131] In terms of warmth retention:

[0132] The far infrared emissivity is 0.93, which meets the standard requirements;

[0133] The far-infrared radiation temperature rise is 2.8℃, which meets the standard requirements.

[0134] Comparative Example 3, using conventional ordinary stentering and shaping to treat the fabric, the obtained finished fabric is:

[0135] The water absorption rate (before washing) is 279%, which meets the standard requirements;

[0136] The water absorption rate (after washing) is 268%, which meets the standard requirements;

[0137] The drip diffusion time (before washing) is 1.6s, which meets the standard requirements;

[0138] The drip diffusion time (after washing) is 1.8s, which meets the standard requirements;

[0139] The wicking height (before washing) is 158mm, which meets the standard requirements;

[0140] The wicking height (after washing) is 159mm, which meets the standard requirements;

[0141] In terms of quick-drying:

[0142] The evaporation rate (before washing) is 0.16g / h, which does not meet the standard requirements;

[0143] The evaporation rate (after washing) is 0.15g / h, which does not meet the standard requirements;

[0144] The moisture permeability (before washing) is 9800g / (㎡·d), which does not meet the standard requirements;

[0145] The moisture permeability (after washing) is 9700g / (㎡·d), which does not meet the standard requirements;

[0146] In terms of warmth retention:

[0147] The far infrared emissivity is 0.85, which does not meet the standard requirements;

[0148] The far-infrared radiation temperature rise is 1.4℃, which does not meet the standard requirements.

[0149] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention may also be implemented in other ways. Any obvious replacement without departing from the concept of the present invention is within the protection scope of the present invention.

Claims

1. A double-layer quick-drying warm cotton fabric, characterized in that: The double-layer fabric comprises a phase change microcapsule finishing agent, a formaldehyde-free resin finishing agent, and a dry softener sprayed on the inner layer of the double-layer fabric, and a far infrared finishing agent and a hydrophilic softener sprayed on the outer layer of the double-layer fabric; The phase change microcapsule finishing agent is TEXSUN COOL-PCM; The formaldehyde-free resin finishing agent is KNITTEX FFRC; The dry softener is ULTRAPHIL HCT; The far-infrared finishing agent is TEXSUN WARM-FIR; The hydrophilic softener is ULTRATEX FMW; Use WEKO turntable spraying equipment to spray phase change microcapsule finishing agent, formaldehyde-free resin finishing agent, and dry softener on the inner layer of the double-layer fabric; Use WEKO turntable spraying equipment to spray far-infrared finishing agent and hydrophilic softener on the outer layer of the double-layer fabric.

2. The all-cotton double-layer quick-drying warm fabric according to claim 1, characterized in that: The double-layer fabric is a double-layer pure cotton fabric.

3. A method for preparing the all-cotton double-layer quick-drying warm fabric according to any one of claims 1-2, characterized in that: The following steps are involved: S1. Spraying and shaping Feed the double-layer fabric into the fabric feeding area, spray the far-infrared finishing agent and hydrophilic softener on the outer layer of the double-layer fabric, and spray the phase change microcapsule finishing agent, formaldehyde-free resin finishing agent, and dry softener on the inner layer of the double-layer fabric; after the spraying is completed, dry it; S2. Pre-shrinkage After the fabric is dried in step S1, the fabric is pre-shrunk by a pre-shrinking machine to obtain a finished product.

4. The method for preparing the all-cotton double-layer quick-drying warm fabric according to claim 3, characterized in that: In step S2, the shrinkage of the pre-shrunk fabric is controlled to be between -3% and 0%.

5. The method for preparing the all-cotton double-layer quick-drying warm fabric according to claim 3, characterized in that: In step S1, the drying temperature is 140-170°C.

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