One-way moisture absorption and sweat releasing double-sided thermal fabric and application thereof

Abstract

The application relates to the field of functional fabric technology and discloses a one-way moisture absorption and sweat releasing double-sided warm-keeping fabric and application thereof. The one-way moisture absorption and sweat releasing double-sided warm-keeping fabric is formed by multi-dimensional weaving of hydrophilic fibers and hydrophobic fibers, the hydrophobic fibers are the inner layer, and the hydrophilic fibers are the surface layer; the hydrophilic fibers are polyester fibers, nylon fibers, spandex or bamboo fibers, and the hydrophobic fibers are heat-sensitive closed-cell foaming fibers. The heat-sensitive closed-cell foaming fibers are prepared by the following method: a glue agent is added into a solvent, dissolved at 70-90 DEG C, and stirred to obtain a resin solution; expandable microspheres, titanium dioxide and silica aerogel are added into the resin solution, and stirred to obtain foaming slurry; the matrix fibers are subjected to surface treatment, then the foaming slurry is coated, and then foaming treatment is carried out to obtain the heat-sensitive closed-cell foaming fibers. The fabric has the one-way moisture absorption and sweat releasing warm-keeping and heat insulation functions through the moisture gradient structure existing in the hydrophilic side and the hydrophobic side, has excellent warm-keeping and heat insulation and air and moisture permeation functions, and can be applied to the field of clothes.

Description

Technical Field

[0001] This invention relates to the field of functional fabric technology, specifically to a unidirectional moisture-wicking double-sided thermal insulation fabric and its applications. Background Technology

[0002] With the development of technology and the improvement of living standards, people tend to choose comfortable clothes that can wick away moisture while also providing warmth. Currently, double-sided or multi-layered fabrics are commonly used to achieve this moisture-wicking function. Double-sided or multi-layered structures are better at meeting comfort requirements than single-layered structures. The capillary movement of sweat and moisture between fibers and yarns also provides superior physiological and hygienic benefits.

[0003] Double-sided or multi-layered fabrics employ a process where a hydrophilic synthetic fiber is used as the inner layer and a hydrophobic fiber as the outer layer. This allows the body's liquid water (such as sweat) and water vapor to be transported into the environment, providing rapid drying in hot and humid conditions and creating a comfortable microclimate for the wearer. However, moisture transport is bidirectional. Because the inability to prevent water penetration in the opposite direction is not prevented, existing double-sided or multi-layered fabrics have a slow moisture absorption rate. During the moisture transfer process, the inner layer of the fabric remains wet and adheres to the body, resulting in a sticky and cold feeling when the skin is sweating. Furthermore, existing double-sided fabrics with moisture-wicking properties do not possess thermal insulation properties and require combination with other insulating materials, a cumbersome process.

[0004] Therefore, developing a fabric that can absorb moisture and wick away perspiration while also providing thermal insulation is of great significance for improving people's quality of life. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention aims to provide a unidirectional moisture-wicking double-sided thermal insulation fabric and its application. The fabric has a hydrophilic fiber as the outer layer and a hydrophobic fiber as the outer layer to achieve unidirectional moisture-wicking function. The hydrophobic fiber is selected from heat-sensitive closed-cell foamed fiber, which has the effect of heat insulation while ensuring moisture-wicking, hydrophobicity and breathability. This solves the problem of skin sticking to the fabric and feeling cold after sweating in the prior art.

[0006] To achieve the above objectives, the present invention employs the following technical solutions.

[0007] This invention provides a unidirectional moisture-wicking double-sided thermal fabric, which is made of hydrophilic and hydrophobic fibers through multi-dimensional weaving. The hydrophobic fiber is the inner layer and the hydrophilic fiber is the outer layer. The hydrophilic fiber is polyester fiber, nylon fiber, spandex or bamboo fiber, and the hydrophobic fiber is heat-sensitive closed-cell foam fiber.

[0008] Preferably, the thermosensitive closed-cell foam fiber is prepared by the following method:

[0009] S1, the adhesive is added to the solvent and dissolved at 70-90℃, and stirred to obtain a resin solution; the adhesive is hydrogenated styrene-butadiene block copolymer SEBS resin, and the solvent is cyclohexane;

[0010] S2, add expandable microspheres, titanium dioxide and silica aerogel to the resin solution and stir to obtain foamed slurry;

[0011] S3, the base fiber is surface treated, and then a foaming slurry is applied to the surface-treated base fiber to obtain coated fiber; the base fiber is polyester fiber or nylon fiber.

[0012] S4, foam the coated fiber to obtain the final product.

[0013] More preferably, the amount of adhesive used is 6-10 wt% of the amount of solvent used.

[0014] More preferably, the amount of the expandable microspheres added is 1-5% of the mass of the solvent.

[0015] More preferably, the mass ratio of the expandable microspheres, titanium dioxide, and silica aerogel is (1.5-5):(3-5):(2-5).

[0016] More preferably, the stirring speed is 500-1000 r / min and the stirring time is 1.5-3 h.

[0017] More preferably, the foaming treatment is carried out at a temperature of 150-180°C for 2-5 minutes.

[0018] More preferably, the surface treatment is as follows:

[0019] The matrix fibers are impregnated in a film-forming aid; the film-forming aid comprises 2 parts acrylic resin, 2 parts acrylic resin modifier BYK-333, 1 part fabric finishing agent and 95 parts deionized water.

[0020] Preferably, the multidimensional weaving method is as follows: odd-numbered wefts are hydrophilic fibers, and even-numbered wefts are heat-sensitive closed-cell foamed fibers.

[0021] The application of the above-mentioned unidirectional moisture-wicking double-sided thermal insulation fabric in clothing.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] The hydrophobic fiber of this invention, namely the heat-sensitive closed-cell foam fiber, has characteristics such as high porosity (>90%) and superhydrophobicity (>120°), and has excellent air permeability, moisture permeability and heat preservation effect. The fabric of this invention can achieve unidirectional moisture conduction and heat insulation function through the moisture gradient structure existing on the hydrophilic side and the hydrophobic side, and has excellent heat insulation and air permeability and moisture permeability. It can be used to make clothing, especially suitable for making functional clothing and special combat uniforms used in extreme environments.

[0024] The fabric of this invention can be produced on a large scale and in batches continuously. The process is simple and the application prospects are broad. The raw materials are cheap and readily available, and the fabric has good sizing properties. The fabric coating adheres firmly, does not shed powder, and is comfortable to wear. Attached Figure Description

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] Figure 1 A diagram showing the fiber weave structure of the fabric;

[0027] Figure 2 This is a schematic diagram of the contact angles of the hydrophilic and hydrophobic sides of the fabric in Example 1;

[0028] Figure 3 is a scanning electron microscope image of the cross-section of the fabric of Example 1. Detailed Implementation

[0029] The embodiments of the present invention will be described in detail below with reference to examples. However, those skilled in the art will understand that the following examples are only for illustrating the present invention and should not be regarded as limiting the scope of the present invention.

[0030] This invention provides a unidirectional moisture-wicking double-sided thermal fabric, which is multi-dimensionally woven from hydrophilic and hydrophobic fibers using a weaving machine, and has a moisture gradient structure on the hydrophilic and hydrophobic sides. The hydrophobic fibers form the inner layer, which is in contact with the skin, while the hydrophilic fibers form the outer layer.

[0031] The hydrophilic fiber is selected from one or more of polyester fiber, nylon fiber, spandex or bamboo fiber, and the hydrophobic fiber is a heat-sensitive closed-cell foam fiber. The heat-sensitive closed-cell foam fiber has a closed-cell structure and is prepared by surface treatment of the matrix fiber, followed by impregnation with foaming slurry and foaming treatment. The matrix fiber is selected from polyester fiber or nylon fiber.

[0032] Existing moisture-wicking double-sided fabrics use hydrophilic fibers as the inner layer and hydrophobic fibers as the outer layer, allowing for bidirectional moisture absorption and wicking. However, during moisture transfer, the inner layer of the fabric becomes wet and adheres to the body, causing a sticky and cold feeling when the skin sweats. The fabric of this invention uses hydrophobic fibers as the inner layer and hydrophilic fibers as the outer layer. Through the moisture gradient structure between the hydrophilic and hydrophobic sides, it achieves unidirectional moisture wicking and thermal insulation, making it suitable for clothing, especially functional clothing and special combat uniforms for use in extreme environments.

[0033] The method for preparing the unidirectional moisture-wicking double-sided thermal insulation fabric of the present invention is as follows:

[0034] First, heat-sensitive closed-cell foam fibers are prepared. Then, hydrophilic fibers and heat-sensitive closed-cell foam fibers are multidimensionally woven using weaving equipment. Figure 1 The diagram shows the fiber weave structure of the fabric, where odd-numbered wefts are hydrophilic fibers and even-numbered wefts are heat-sensitive closed-cell foam fibers. This creates a moisture gradient structure with hydrophilic and hydrophobic sides, resulting in a unidirectional moisture-wicking, double-sided insulating fabric. The heat-sensitive closed-cell foam fibers are prepared using the following method:

[0035] First, the hydrogenated styrene-butadiene block copolymer adhesive is added to the solvent cyclohexane, with the amount of hydrogenated styrene-butadiene block copolymer being 6-10 wt% of the amount of cyclohexane. It is dissolved at 70-90°C and stirred at 500-1000 r / min for 1.5-3 h to obtain a resin solution. Preferably, the molecular weight of the hydrogenated styrene-butadiene block copolymer is 200,000-240,000.

[0036] Next, expandable microspheres, titanium dioxide, and silica aerogel are added to the resin solution. The amount of expandable microspheres added is 1-5% of the mass of cyclohexane. The mass ratio of expandable microspheres, titanium dioxide, and silica aerogel is (1.5-5):(3-5):(2-5). The mixture is stirred at a speed of 500-1000 r / min for 1.5-3 h to obtain a foamed slurry.

[0037] Among them, expandable microspheres are thermoplastic hollow polymer spheres composed of a thermoplastic polymer shell and encapsulated liquid alkane gas. When the microspheres are heated, the shell softens, the internal gas pressure increases sharply, causing the microspheres to expand, increasing their volume by 80 to 100 times; titanium dioxide can increase the reflectivity of the foaming slurry and improve its thermal insulation effect; silica aerogel can increase the viscosity of the foaming slurry and improve its stability.

[0038] Next, the base fiber is immersed in a film-forming aid for impregnation; the film-forming aid is composed of 2 parts crosslinking agent, 2 parts water-based leveling agent, 1 part fabric finishing agent and 95 parts deionized water mixed and stirred evenly; the surface-treated base fiber is coated with a foaming slurry to obtain coated fiber; wherein, the crosslinking agent is preferably acrylic resin, the water-based leveling agent is preferably acrylic resin modifier BYK-333, and the fabric finishing agent is a mixture of isomeric tridecyl alcohol polyoxyethylene ether and dehydrated sorbitol fatty acid ester in a mass ratio of 1:1.

[0039] Finally, the coated fibers are heated in an oven at 150-180℃ for 2-5 minutes to foam, thus obtaining heat-sensitive closed-cell foamed fibers.

[0040] The inventors discovered that during the preparation of thermosensitive closed-cell foamed fibers, the composition and ratio of the foaming slurry, as well as the use of film-forming aids, have a significant impact on the moisture absorption, perspiration wicking, and heat insulation properties of the thermosensitive closed-cell foamed fibers. Only by selecting appropriate foaming slurry raw materials and within a specific ratio range can a double-sided thermal insulation fabric with excellent moisture absorption, perspiration wicking, and heat insulation functions and no powder shedding be prepared.

[0041] The present invention will be further illustrated by the following embodiments. Unless otherwise specified, the raw materials and equipment used in the present invention are commonly used in the art; unless otherwise specified, the methods used in the present invention are conventional methods in the art. In the following embodiments, both the hydrophilic fiber and the matrix fiber are made of polyester yarn.

[0042] Preparation of film-forming aids:

[0043] Two parts of crosslinking agent, two parts of water-based fabric leveling agent, and one part of fabric finishing agent were added to a certain amount of deionized water and mixed evenly to prepare a film additive for use in subsequent examples.

[0044] Example 1

[0045] 1) Add 8 parts of hydrogenated styrene-butadiene block copolymer to 80 parts of cyclohexane, dissolve at 80°C, and stir at 1000 r / min for 1.5 h to obtain a resin solution;

[0046] 2) Add 4 parts expandable microspheres, 3 parts titanium dioxide, and 2 parts silica aerogel to the resin solution and stir at 500 r / min for 3 h to obtain foamed slurry;

[0047] 3) The polyester yarn is immersed in a film-forming agent for surface treatment; then a foaming slurry is used to coat the surface-treated polyester yarn to obtain coated fibers.

[0048] 4) The coated fiber is placed in an oven and dried at 180℃ for 4 minutes to foam, thus obtaining heat-sensitive closed-cell foamed fiber.

[0049] 5) Take polyester yarn and heat-sensitive closed-cell foam fiber and weave them in multiple dimensions using a weaving machine to obtain fabric W1.

[0050] Example 2

[0051] 1) Add 8 parts of hydrogenated styrene-butadiene block copolymer to 80 parts of cyclohexane, dissolve at 90°C, and stir at 700 r / min for 1.5 h to obtain resin solution;

[0052] 2) Add 3.2 parts expandable microspheres, 5 parts titanium dioxide, and 3 parts silica aerogel to the resin solution and stir at 800 r / min for 3 h to obtain foamed slurry;

[0053] 3) The polyester yarn is immersed in a film-forming agent for surface treatment; then a foaming slurry is used to coat the surface-treated polyester yarn to obtain coated fibers.

[0054] 4) The coated fiber is placed in an oven and dried at 150℃ for 5 minutes to foam, thus obtaining heat-sensitive closed-cell foamed fiber.

[0055] 5) Take polyester yarn and heat-sensitive closed-cell foam fiber and weave them in multiple dimensions using a weaving machine to obtain fabric W2.

[0056] Example 3

[0057] 1) Add 8 parts of hydrogenated styrene-butadiene block copolymer to 80 parts of cyclohexane, dissolve at 80°C, and stir at 500 r / min for 1.5 h to obtain a resin solution;

[0058] 2) Add 2.4 parts expandable microspheres, 3 parts titanium dioxide, and 4 parts silica aerogel to the resin solution and stir at 1000 r / min for 2 h to obtain foamed slurry;

[0059] 3) The polyester yarn is immersed in a film-forming agent for surface treatment; then a foaming slurry is used to coat the surface-treated polyester yarn to obtain coated fibers.

[0060] 4) The coated fiber is placed in an oven and dried at 180℃ for 2 minutes to foam, thus obtaining heat-sensitive closed-cell foamed fiber.

[0061] 5) Take polyester yarn and heat-sensitive closed-cell foam fiber and weave them in multiple dimensions using a weaving machine to obtain fabric W3.

[0062] Example 4

[0063] 1) Add 8 parts of hydrogenated styrene-butadiene block copolymer to 80 parts of cyclohexane, dissolve at 70°C, and stir at 1000 r / min for 1.5 minutes to obtain a resin solution;

[0064] 2) Add 1.6 parts expandable microspheres, 3 parts titanium dioxide, and 5 parts silica aerogel to the resin solution and stir at 500 r / min for 2 h to obtain foamed slurry;

[0065] 3) The polyester yarn is immersed in a film-forming agent for surface treatment; then a foaming slurry is used to coat the surface-treated polyester yarn to obtain coated fibers.

[0066] 4) The coated fiber is placed in an oven and dried at 160℃ for 2 minutes to foam, thus obtaining heat-sensitive closed-cell foamed fiber.

[0067] 5) Take polyester yarn and heat-sensitive closed-cell foam fiber and weave them in multiple dimensions using a weaving machine to obtain fabric W4.

[0068] Comparative Example 1

[0069] 1) Add 8 parts of hydrogenated styrene-butadiene block copolymer to 80 parts of cyclohexane, dissolve at 80°C, and stir at 1000 r / min for 1.5 minutes to obtain a resin solution;

[0070] 2) Add 3 parts titanium dioxide and 2 parts silica aerogel to the resin solution and stir at 500 r / min for 3 h to obtain foamed slurry;

[0071] 3) The polyester yarn is immersed in a film-forming agent for surface treatment; then a foaming slurry is used to coat the surface-treated polyester yarn to obtain coated fibers.

[0072] 4) The coated fiber is placed in an oven and dried at 180℃ for 4 minutes to foam, thus obtaining heat-sensitive closed-cell foamed fiber.

[0073] 5) Take polyester yarn and heat-sensitive closed-cell foam fiber and weave them in multiple dimensions using a weaving machine to obtain fabric D1.

[0074] Comparative Example 2

[0075] 1) Add 8 parts of hydrogenated styrene-butadiene block copolymer to 80 parts of cyclohexane, dissolve at 80°C, and stir at 1000 r / min for 1.5 minutes to obtain a resin solution;

[0076] 2) Add 4.8 parts expandable microspheres, 3 parts titanium dioxide, and 2 parts silica aerogel to the resin solution and stir at 500 r / min for 3 h to obtain foamed slurry;

[0077] 3) The polyester yarn is immersed in a film-forming agent for surface treatment; then a foaming slurry is used to coat the surface-treated polyester yarn to obtain coated fibers.

[0078] 4) The coated fiber is placed in an oven and dried at 180℃ for 4 minutes to foam, thus obtaining heat-sensitive closed-cell foamed fiber.

[0079] 5) Take polyester yarn and heat-sensitive closed-cell foam fiber and weave them in multiple dimensions using a weaving machine to obtain fabric D2.

[0080] The performance of fabrics W1-W4 prepared in Examples 1-4 and fabrics D1 and D2 prepared in Comparative Examples 1-2 was tested.

[0081] The test results are shown in Table 1, and the test method is as follows:

[0082] Contact angle test: The Finnish Biolin Theta method was used for testing.

[0083] Thermal conductivity: Tested according to the method of GB / T 10295-2008.

[0084] Porosity: Tested using the density method.

[0085] Table 1. Performance test results of fabrics with different amounts of expandable microspheres added.

[0086]

[0087] In Table 1, porosity refers to the ratio of pore volume to total volume. The porosity directly affects the air permeability and moisture permeability of the fabric. The larger the porosity, the better the air and moisture permeability. Thermal conductivity is an important parameter characterizing the heat conduction capacity of a fabric; the lower the thermal conductivity, the better the heat insulation effect. Contact angle is the angle formed at the interface between the liquid, solid, and gas phases when a liquid cannot spread on a solid surface and remains in a certain shape. The smaller the contact angle, the better the wetting performance; the larger the contact angle, the more difficult it is to wet. If the contact angle is >90°, the fabric surface cannot be wetted, and the droplets will form beads on the solid surface.

[0088] In Examples 1-4, the amount of expandable microspheres added varied within the scope of this invention. The performance test results of the fabrics prepared in Examples 1-4 are shown in Table 1. Fabrics W1-W4 all exhibited high porosity, low thermal conductivity, and large contact angles. With increasing amounts of expandable microspheres, the porosity of the fabrics increased, the thermal conductivity decreased, and the contact angle increased. The air permeability, moisture permeability, heat insulation effect, and hydrophobic properties of the fabrics were further improved, indicating that fabrics W1-W4 all possessed excellent air permeability, moisture permeability, heat insulation effect, and hydrophobic properties.

[0089] Comparative Example 1 did not add expandable microspheres. The fabric D1 prepared in Comparative Example 1 had a porosity of 0 and a thermal conductivity of 0.1087 mW / m². -1 K -1 It has poor air and moisture permeability, and its heat preservation effect is significantly lower than that of fabrics W1-W4.

[0090] The amount of expandable microspheres added in Comparative Example 2 was 6 wt%. The fabric D2 prepared in Comparative Example 2 also has high porosity, low thermal conductivity and large contact angle, and has good air permeability, good heat preservation effect and good hydrophobic properties. However, fabric D2 sheds powder, which affects the comfort of wearing it.

[0091] When the amount of expandable microspheres added is in the range of 1-5 wt%, the fabric exhibits excellent air permeability and moisture permeability, good heat insulation effect, and good hydrophobic properties, without shedding powder. Fabric W1 has an expandable microsphere addition of 5 wt%, a porosity of up to 95%, and a thermal conductivity of 0.0433 mW / m². -1 K -1 With a contact angle of 142°, it boasts the best overall performance.

[0092] The hydrophobic properties of the hydrophilic and hydrophobic sides of fabric W1 were evaluated, such as... Figure 2 As shown. Figure 2 The upper and middle layers are the hydrophobic side of the fabric, and the lower layer is the hydrophilic side. After water droplets are dropped onto the hydrophilic and hydrophobic sides respectively, the contact angle of the hydrophilic side gradually decreases, and wetting occurs on the hydrophilic side after 1.8s; while the contact angle of the hydrophobic side does not change after 1.8s, indicating that fabric W2 has excellent hydrophobic properties.

[0093] Figure 3 is a scanning electron microscope (SEM) image of a cross-section of fabric W1. From... Figure 3a and Figure 3b It can be seen that after multidimensional weaving of hydrophilic fibers and heat-sensitive closed-cell foam fibers, a double-sided fabric with a water transport gradient on both hydrophilic and hydrophobic sides is obtained. The heat-sensitive closed-cell foam fibers on the hydrophobic side form a closed-cell spherical micro-nano structure, which is not only hydrophobic but also heat-insulating; while the hydrophilic side is composed of filamentous hydrophilic fibers, which enables the fabric to have unidirectional moisture absorption and perspiration wicking and warmth retention functions.

[0094] With an expandable microsphere addition of 5 wt%, the amount of adhesive added was varied to prepare fabrics W6 and D3 and their performance was tested. The test results are shown in Table 2.

[0095] Example 6

[0096] 1) Add 5 parts of hydrogenated styrene-butadiene block copolymer to 80 parts of cyclohexane, dissolve at 80°C, and stir at 1000 r / min for 1.5 minutes to obtain a resin solution;

[0097] 2) Add 4 parts expandable microspheres, 3 parts titanium dioxide, and 2 parts silica aerogel to the resin solution and stir at 500 r / min for 3 h to obtain foamed slurry;

[0098] 3) The polyester yarn is immersed in a film-forming agent for surface treatment; then a foaming slurry is used to coat the surface-treated polyester yarn to obtain coated fibers.

[0099] 4) The coated fiber is placed in an oven and dried at 180℃ for 4 minutes to foam, thus obtaining heat-sensitive closed-cell foamed fiber.

[0100] 5) Take polyester yarn and heat-sensitive closed-cell foam fiber and weave them in multiple dimensions using a weaving machine to obtain fabric W6.

[0101] Comparative Example 3

[0102] 1) Add 4 parts of hydrogenated styrene-butadiene block copolymer to 80 parts of cyclohexane, dissolve at 80°C, and stir at 1000 r / min for 1.5 minutes to obtain a resin solution;

[0103] 2) Add 4 parts expandable microspheres, 3 parts titanium dioxide, and 2 parts silica aerogel to the resin solution and stir at 500 r / min for 3 h to obtain foamed slurry;

[0104] 3) The polyester yarn is immersed in a film-forming agent for surface treatment; then a foaming slurry is used to coat the surface-treated polyester yarn to obtain coated fibers.

[0105] 4) The coated fiber is placed in an oven and dried at 180℃ for 4 minutes to foam, thus obtaining heat-sensitive closed-cell foamed fiber.

[0106] 5) Take polyester yarn and heat-sensitive closed-cell foam fiber and weave them in multiple dimensions using a weaving machine to obtain fabric D3.

[0107] Table 2 Performance test results of fabrics prepared with different adhesive addition amounts

[0108]

[0109] Fabric W1 had an adhesive addition of 10 wt%, W6 had an adhesive addition of 6 wt%, and Comparative Example 3's fabric D3 had an adhesive addition of 5 wt%. Table 2 shows that with increasing adhesive addition, the contact angle and thermal conductivity gradually decreased, indicating a decrease in hydrophobicity and an increase in thermal insulation. When the adhesive addition was 5%, fabric D3 exhibited slight dust shedding; when the adhesive addition was in the range of 6-10 wt%, the fabric possessed excellent air permeability and moisture permeability, excellent thermal insulation, and excellent hydrophobicity, without dust shedding.

[0110] The hydrophobic fiber prepared in the embodiments of the present invention, namely the heat-sensitive closed-cell foam fiber, has the characteristics of high porosity (>90%), superhydrophobicity (>120°), and low thermal conductivity, and has excellent air permeability, moisture permeability and heat preservation effect; the fabric of the embodiments of the present invention can achieve unidirectional moisture conduction and heat insulation function through the moisture gradient structure existing on the hydrophilic side and the hydrophobic side.

[0111] Although the present invention has been described in detail in this specification with general description and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention are within the scope of protection claimed by the present invention.

Claims

1. A unidirectional moisture-wicking, double-sided thermal insulation fabric, characterized in that, It is made of hydrophilic and hydrophobic fibers through multi-dimensional weaving, wherein the hydrophobic fiber is the inner layer and the hydrophilic fiber is the outer layer; the hydrophilic fiber is polyester fiber, nylon fiber, spandex or bamboo fiber, and the hydrophobic fiber is heat-sensitive closed-cell foam fiber. The thermosensitive closed-cell foam fiber is prepared by the following method: S1, the adhesive is added to the solvent and dissolved at 70-90℃, and stirred to obtain a resin solution; the adhesive is hydrogenated styrene-butadiene block copolymer SEBS resin, and the solvent is cyclohexane; S2, add expandable microspheres, titanium dioxide and silica aerogel to the resin solution and stir to obtain foamed slurry; S3, the base fiber is surface treated, and then the surface-treated base fiber is coated with foaming slurry to obtain coated fiber; The matrix fiber is polyester fiber or nylon fiber; S4, foam the coated fiber to obtain the final product.

2. The unidirectional moisture-wicking double-sided thermal insulation fabric according to claim 1, characterized in that, The amount of adhesive used is 6-10 wt% of the amount of solvent used.

3. The unidirectional moisture-wicking double-sided thermal insulation fabric according to claim 1, characterized in that, The amount of expandable microspheres added is 1-5% of the mass of the solvent.

4. The unidirectional moisture-wicking double-sided thermal insulation fabric according to claim 1, characterized in that, The mass ratio of the expandable microspheres, titanium dioxide, and silica aerogel is (1.5-5):(3-5):(2-5).

5. The unidirectional moisture-wicking double-sided thermal insulation fabric according to claim 1, characterized in that, The stirring speed is 500-1000 r / min, and the stirring time is 1.5-3 h.

6. The unidirectional moisture-wicking double-sided thermal insulation fabric according to claim 1, characterized in that, The foaming process is carried out at a temperature of 150-180℃ for 2-5 minutes.

7. The unidirectional moisture-wicking double-sided thermal insulation fabric according to claim 1, characterized in that, The surface treatment is as follows: The matrix fibers are impregnated in a film-forming aid; the film-forming aid comprises 2 parts acrylic resin, 2 parts acrylic resin modifier BYK-333, 1 part fabric finishing agent and 95 parts deionized water.

8. The unidirectional moisture-wicking double-sided thermal insulation fabric according to claim 1, characterized in that, The multidimensional weaving method is as follows: odd-numbered wefts are hydrophilic fibers, and even-numbered wefts are heat-sensitive closed-cell foamed fibers.

9. The application of the unidirectional moisture-wicking double-sided thermal insulation fabric as described in claims 1-8 in clothing.

Images