A warm and breathable double-layer fabric

Abstract

The application relates to the field of fabrics, in particular to a warm and breathable double-layer fabric. The double-layer fabric comprises a surface layer and an inner layer, the surface layer and the inner layer are connected through a connecting line, the surface layer and the inner layer are both knitted fabrics, the components of the surface layer and the inner layer are composed of 20-70% acrylic, 25-80% viscose fiber, 0-25% spandex, 0-25% modal, 0-25% polyester and 0-36% natural fiber; the natural fiber is composed of one or more of mulberry silk, sheep wool, rabbit hair, cashmere, camel hair and cotton; the inner layer and the surface layer obtained by mixing acrylic and viscose fiber have better air permeability, moisture permeability, wear resistance and warmth; the connecting line can stably connect the inner layer and the surface layer, so that the formed double-layer fabric has better warmth, air permeability, moisture permeability and wear resistance; when used for producing clothes, the double-layer fabric has the advantages of better warmth, air permeability and wear resistance, and improves the wearing comfort and durability of the clothes.

Description

Technical Field

[0001] This application relates to the field of fabrics, and more specifically, to a warm and breathable double-layer fabric. Background Technology

[0002] With the development of science and technology and the improvement of people's quality of life, people have higher requirements for the quality, function and durability of clothing. Therefore, clothing fabrics are required to be breathable, warm, and prevent pilling.

[0003] Currently, most winter clothes are made of flannel and coral fleece, which have good warmth retention. However, flannel and coral fleece have poor breathability and are prone to absorbing sweat, generating static electricity, shedding, and pilling during wear, reducing the comfort of wearing them.

[0004] Therefore, by fixing two layers of knitted fabric together to form a warm double-layer fabric, the single-layer knitted fabric has better breathability. When the double layer is set, it combines both good warmth and breathability, thus replacing flannel and coral fleece.

[0005] However, current knitted thermal double-layer fabrics use cotton as the main material. Although cotton has good warmth retention and breathability, it is prone to wear and pilling during use, which reduces the durability of the fabric. Therefore, further research is needed. Summary of the Invention

[0006] In order to achieve better warmth retention, as well as better breathability, moisture permeability and abrasion resistance, this application provides a double-layer fabric that is both warm and breathable.

[0007] This application provides a warm and breathable double-layer fabric, comprising an outer layer and an inner layer connected by a connecting thread. Both the outer and inner layers are knitted fabrics, and each layer is composed of 20-70% acrylic fiber, 25-80% viscose fiber, 0-25% spandex, 0-25% modal, 0-25% polyester, and 0-36% natural fibers. The natural fibers are one or more of mulberry silk, sheep wool, rabbit hair, cashmere, camel hair, and cotton.

[0008] In the above technical solution, 20-70% acrylic fiber has better warmth retention, good elasticity and strength, while viscose fiber has good softness, comfort, moisture absorption and breathability. Therefore, acrylic fiber and viscose fiber are used as the main components, and their properties are combined to make the double-layer fabric have better softness, comfort, warmth retention, moisture absorption, breathability and wear resistance.

[0009] Silk, sheep wool, rabbit hair, cashmere, camel hair, and cotton are all natural fibers with good warmth retention and moisture absorption. Therefore, when blended with acrylic and viscose fibers, the warmth retention, breathability, and moisture permeability of the double-layer fabric are further improved.

[0010] Furthermore, by adding spandex to the base of acrylic and viscose fibers, the warmth, breathability, and abrasion resistance of the double-layer fabric are further improved.

[0011] Modal has high water absorption, and when combined with acrylic and viscose fibers, it can further improve the moisture permeability of double-layer fabrics.

[0012] Polyester has advantages such as quick drying and good elasticity. Therefore, when it is compounded with acrylic and viscose fibers, the quick drying and abrasion resistance of the double-layer fabric are further improved.

[0013] The percentages in the components of this application refer to mass fractions.

[0014] Preferably, both the outer layer and the inner layer are composed of 24-26% acrylic fiber and 64-66% viscose fiber.

[0015] When using the above mass fraction range, its warmth retention rate can reach over 30%, and it also has good breathability, moisture permeability, and abrasion resistance. Therefore, the resulting double-layer fabric provides better warmth and breathability, and reduces the possibility of wear and tear on the manufactured garments.

[0016] Preferably, both the outer layer and the inner layer are composed of 25% acrylic fiber, 60% viscose fiber, and 15% spandex.

[0017] Adding spandex to acrylic and viscose fibers provides quick-drying properties, high elasticity, abrasion resistance, and moisture absorption. Therefore, it can be combined with acrylic and viscose fibers to create a double-layer fabric that combines excellent softness, comfort, moisture absorption, abrasion resistance, and breathability.

[0018] Preferably, both the outer layer and the inner layer are composed of 25-71.3% acrylic fiber, 17.1-63% viscose fiber, 10-11.6% spandex, and 0-5% natural fiber.

[0019] In the above technical solution, the addition of natural fibers to acrylic fiber, viscose fiber, and spandex can further improve the warmth retention, breathability, and moisture permeability, and, in combination with acrylic fiber, viscose fiber, and spandex, make its abrasion resistance better.

[0020] Preferably, both the outer layer and the inner layer are composed of 25-36% acrylic fiber, 10% spandex, 36% viscose fiber, 0-25% modal, 0-25% polyester, and 4% natural fiber.

[0021] The above-mentioned solution uses acrylic fiber, viscose fiber, and spandex as the main raw materials, and adds modal or polyester to achieve better abrasion resistance and warmth. Adding 4% natural fibers further results in a double-layer fabric that combines excellent abrasion resistance, breathability, moisture permeability, and warmth through textile processing. When used in clothing production, it exhibits excellent warmth, breathability, and moisture permeability, as well as good durability.

[0022] Preferably, the surface layer has a basis weight of 280-300 g / m². 2 .

[0023] The fabric weight is the preferred choice for this application, and the resulting double-layer fabric has better breathability, warmth retention and moisture permeability, improving the comfort of wearing clothing.

[0024] Preferably, the connecting wire is made of spandex.

[0025] Using spandex as the connecting thread can stably connect the outer layer and the inner layer, and has better abrasion resistance, reducing the possibility of wear.

[0026] Preferably, the double-layer fabric is a heat-insulating double-layer fabric, which is obtained by the following method:

[0027] Step 1: Place the double-layer fabric into the first active liquid for activation treatment, so that the fabric is saturated with water, and then dry it so that the surface humidity of the double-layer fabric reaches 45-55%, thus obtaining the activated fabric.

[0028] Step 2: Weigh 2.3-3.6 parts of porous silica aerogel, 0.5-0.8 parts of adhesive, 0.01-0.03 parts of OP-10, 0.002-0.003 parts of initiator, and 20-30 parts of solvent, mix them evenly to obtain a thermal insulation agent; then immerse the activated fabric in the thermal insulation agent, take it out, heat it to 60-65℃, pre-cur it for 5-10 seconds, and initially form a thermal insulation film. At 101-103℃, vacuum dry it for 3-5 minutes to form several pores in the thermal insulation film, and obtain a thermal insulation porous fabric;

[0029] Step 3: Immerse the thermally insulating porous fabric in the second active liquid and dry it to obtain a double-layered fabric with thermal insulation treatment.

[0030] In the above process, the double-layer fabric is saturated with water and then dried until the surface humidity of the fabric reaches 45-55%. At this point, the fibers in the fabric absorb water, and when dried to a humidity of 45-55%, moisture is still trapped inside the fibers, resulting in an activated fabric.

[0031] When the activated fabric is immersed in the thermal insulation agent, its porous silica aerogel is easily adsorbed onto the fiber surface. Under the action of adhesion, the porous silica aerogel adheres stably. The porous silica aerogel has a relatively low thermal conductivity, porosity, and abrasion resistance, which can be combined with double-layer fabric to achieve better thermal insulation and abrasion resistance.

[0032] Next, pre-curing is performed. At this time, the adhesive on the surface of the fabric fibers begins to solidify into a film. The initially formed insulating film covers the fiber surface of the double-layer fabric. This insulating film is not completely cured. Then, it is heated to 101-103℃ under vacuum and vacuum dried for 3-5 minutes. During this process, the moisture inside the yarn fibers will be completely evaporated and pass through the initial insulating film. During the curing process, the insulating film forms several pores, thus forming a porous insulating film on the surface of the fabric fibers. This improves the warmth and abrasion resistance of the double-layer fabric treated with insulation, while also providing better breathability and moisture permeability.

[0033] The second activating liquid serves to reactivate and clean the fabric, improving its environmental friendliness and safety.

[0034] Preferably, the particle size of the porous silica aerogel is 30-150 nm.

[0035] The porous silica aerogels selected from the above particle size range have good abrasion resistance, low thermal conductivity, and can be easily adsorbed onto the fiber surface of fabrics, providing better warmth and abrasion resistance.

[0036] Preferably, the adhesive is composed of the following raw materials in parts by weight:

[0037] 0.8-1.5 parts of 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane

[0038] 0.1-0.3 parts of methacryloyloxyethyl maleic acid monoester and 0.1-0.8 parts of ethoxyethoxyethyl acrylate.

[0039] Initiator 0.01-0.003 parts.

[0040] After being compounded and polymerized with 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, methacryloyloxyethyl maleic acid monoester, and ethoxyethoxyethyl acrylate, an adhesive with good flexibility and adhesion is formed. Therefore, it can stably adhere a large amount of porous silica aerogel to the fiber surface of the fabric, improve the fabric's abrasion resistance and warmth retention, and at the same time maintain the fabric's good breathability and moisture permeability.

[0041] The structural formula of methacryloyloxyethyl maleic acid monoester is as follows:

[0042]

[0043] The structural formula of ethoxyethoxyethyl acrylate is as follows:

[0044]

[0045] The structural formula of 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane is as follows:

[0046]

[0047] The adhesive formed by blending and polymerizing the above three substances (2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, methacryloyloxyethyl maleic acid monoester, and ethoxyethoxyethyl acrylate) has good adhesion to porous silica aerogel and fiber surface, thus giving the fabric good warmth retention, abrasion resistance and breathability.

[0048] Preferably, the first active liquid is composed of methacryloylethyl sulfobetaine, anhydrous ethanol, and water; the second active liquid is composed of cocamidopropylamine oxide, water, and anhydrous ethanol.

[0049] Methacrylethyl sulfobetaine has good dispersibility and wettability, and it can be easily adsorbed onto the surface of fabric yarn fibers. When the activated fabric is immersed in the thermal insulation agent and cured, it reacts further with the adhesive under the action of the initiator, so that more porous silica aerogels can be stably adhered to the surface of the fabric yarn fibers, thereby improving abrasion resistance and warmth retention.

[0050] The structural formula of methacryloylethyl sulfobetaine is as follows:

[0051]

[0052] The second active liquid is composed of cocamidopropylamine oxide, water, and anhydrous ethanol. Anhydrous ethanol can remove small molecule substances adhering to the surface, water plays an auxiliary role in cleaning, and cocamidopropylamine oxide has a surface-active effect, thereby promoting the activation and cleaning effect, resulting in fabrics with advantages such as neatness and cleanliness.

[0053] The CAS number for cocamidopropylamine oxide is 68155-09-9.

[0054] In summary, this application has the following beneficial effects:

[0055] 1. The inner and outer layers, made by blending 20-70% acrylic fiber and 25-80% viscose fiber and through textile processes, have excellent breathability, moisture permeability, abrasion resistance, and warmth. The connecting thread can stably connect the inner and outer layers, so that the resulting double-layer fabric has excellent warmth, breathability, moisture permeability, and abrasion resistance. When used to produce clothing, it has the advantages of excellent warmth, breathability, and abrasion resistance, improving the wearing comfort and durability of the clothing.

[0056] 2. After the double-layer fabric undergoes an initial activation and water absorption process, it is then treated with a thermal insulation agent. This process causes porous silica aerogel to be adsorbed onto the surface of the fabric fibers. The aerogel is then adhered and stabilized using an adhesive. After initial curing, an incompletely cured thermal insulation film is formed. Following high-temperature vacuum drying, the moisture inside the fabric fibers completely evaporates, and the thermal insulation film further cures. Moisture permeates the thermal insulation film, creating several pores. This curing process gives the thermal insulation film excellent breathability, warmth, and abrasion resistance. The resulting double-layer fabric possesses excellent warmth, breathability, moisture permeability, and abrasion resistance.

[0057] 3. After compounding and polymerizing 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, methacryloyloxyethyl maleic acid monoester, and ethoxyethoxyethyl acrylate, an adhesive with good flexibility and adhesion is formed. Therefore, it can stably adhere a large amount of porous silica aerogel to the fiber surface of the fabric, improve the fabric's abrasion resistance and warmth retention, and at the same time maintain the fabric's good breathability and moisture permeability.

[0058] 4. Methacrylethyl sulfobetaine has good dispersibility and wettability, and it is easy to be adsorbed onto the surface of the fabric yarn fibers. When the activated fabric is immersed in the thermal insulation agent and cured, it reacts further with the adhesive under the action of the initiator, so that more porous silica aerogels are stably adhered to the surface of the fabric yarn fibers, improving abrasion resistance and warmth retention. Detailed Implementation

[0059] The present application will be further described in detail below with reference to the embodiments.

[0060] Example

[0061] Example 1

[0062] A warm and breathable double-layer fabric includes an outer layer and an inner layer, which are connected by a connecting line that stabilizes and solidifies the outer and inner layers. The connecting line is made of spandex.

[0063] Both the outer and inner layers are knitted fabrics, with the outer layer composed of 30% acrylic and 70% viscose fiber, and the inner layer composed of 30% acrylic and 70% viscose fiber.

[0064] The surface layer has a basis weight of 280g / m². 2 The inner layer has a weight of 300g / m³. 2 Both the outer and inner layer yarns are 40 count, the spandex yarn is 70D, and the connecting thread usage is 5g / m. 2 .

[0065] Example 2-10

[0066] The difference between Examples 2-10 and Example 1 is that the composition of the inner layer and the outer layer are different, as shown in Table 1.

[0067] Table 1. Composition of the inner and outer layers in Examples 1-10

[0068]

[0069]

[0070] Example 11

[0071] The difference between Example 11 and Example 10 is that the double-layer fabric is a double-layer fabric that has undergone a heat-insulating treatment, and this heat-insulating double-layer fabric is obtained by the following method:

[0072] Step 1: Weigh 0.1 kg of methacryloyl ethyl sulfobetaine, 2 kg of anhydrous ethanol, and 10 kg of water and mix them evenly to obtain the first active liquid; convey the double-layer fabric to a tank containing the first active liquid at 30°C through a conveying device, so that the double-layer fabric is completely immersed in the first active liquid and activated. The immersion time is 5 min and the conveying speed is 1 m / min, so that the fabric is saturated with water. Then, it is conveyed to a drying device for drying, so that the surface humidity of the double-layer fabric reaches 45%, and the activated fabric is obtained.

[0073] Step 2: Weigh 2.3 kg of porous silica aerogel, 0.5 kg of adhesive, 0.01 kg of OP-10, and 10 kg of anhydrous ethanol and mix them evenly to obtain solution A. Weigh 10 kg of water and 0.002 kg of initiator and mix them evenly to obtain solution B. Mix all of solution A and all of solution B evenly to obtain the heat preservation agent.

[0074] The activated fabric is then conveyed to a tank containing a 30°C heat-retaining agent, where it is completely submerged for 5 minutes at a conveying speed of 1 m / min. It is then conveyed to a two-roller extrusion device to squeeze out the water and ethanol trapped within the soaked activated fabric, maintaining the adhesive wet weight of the activated fabric at 180 g / m². 2The material is then transferred to a 60°C oven for 5 seconds for initial curing, forming a thermal insulation film. Next, it is transferred to a vacuum drying device and dried under vacuum conditions at -0.1 MPa and 101°C for 5 minutes, creating several pores in the thermal insulation film to obtain a thermally insulating porous fabric.

[0075] Step 3: Weigh 0.5 kg of cocamidopropylamine oxide, 20 kg of water, and 5 kg of anhydrous ethanol and mix them evenly. Transfer the thermal insulation porous fabric to a second active liquid that is immersed at 30°C for 1 minute. Then transfer it to a drying device and dry it at 80°C for 10 minutes to obtain a thermal insulation double-layer fabric.

[0076] The porous silica aerogel has an average particle size of 50 nm. The initiator is ammonium persulfate, and the adhesive is 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane.

[0077] The humidity of the fabric surface refers to the humidity of the surface layer.

[0078] Example 12

[0079] The difference between Example 12 and Example 11 lies in the raw material composition of the heat-insulating agent, the humidity in step 1, and the process parameters in step 2, as detailed below:

[0080] Step 1: Ensure the surface humidity of the double-layer fabric reaches 50%;

[0081] Step 2: Weigh 3 kg of porous silica aerogel, 0.7 kg of adhesive, 0.02 kg of OP-10, and 10 kg of anhydrous ethanol and mix them evenly to obtain solution A. Weigh 15 kg of water and 0.003 kg of initiator and mix them evenly to obtain solution B. Mix all of solution A and all of solution B evenly to obtain the heat preservation agent.

[0082] The activated fabric is then conveyed to a tank containing a 30°C heat-retaining agent, where it is completely submerged for 5 minutes at a conveying speed of 1 m / min. It is then conveyed to a two-roller extrusion device to squeeze out the water and ethanol trapped within the soaked activated fabric, maintaining the adhesive wet weight of the activated fabric at 180 g / m². 2 The material is then transferred to a 60°C oven for 7 seconds for initial curing, forming a thermal insulation film. Next, it is transferred to a vacuum drying device and dried under vacuum conditions at -0.1 MPa and 102°C for 4 minutes, creating pores in the thermal insulation film to obtain a thermally insulating porous fabric.

[0083] Example 13

[0084] The difference between Example 13 and Example 11 lies in the different raw material composition of the heat-insulating agent, the different humidity in step 1, and the different process parameters in step 2, as detailed below:

[0085] Step 1: Ensure the surface humidity of the double-layer fabric reaches 55%;

[0086] Step 2: Weigh 3.6 kg of porous silica aerogel, 0.8 kg of adhesive, 0.03 kg of OP-10, and 10 kg of anhydrous ethanol and mix them evenly to obtain solution A. Weigh 20 kg of water and 0.002 kg of initiator and mix them evenly to obtain solution B. Mix all of solution A and all of solution B evenly to obtain the heat preservation agent.

[0087] The activated fabric is then transferred to a tank containing a 30°C heat-insulating agent, where it is completely submerged for 5 minutes at a conveying speed of 1 m / min. It is then transferred to a two-roller extrusion device to squeeze out the water and ethanol trapped within the activated fabric, maintaining the adhesive wet weight of the activated fabric at 180 g / m². Next, it is transferred to a 60°C oven for 10 seconds of initial curing to form a heat-insulating film. Finally, it is transferred to a vacuum drying device and vacuum-dried for 3 minutes at a vacuum gauge reading of -0.1 MPa and a temperature of 103°C, creating several pores in the heat-insulating film to obtain a porous heat-insulating fabric.

[0088] Example 14

[0089] The difference between Example 14 and Example 11 is that the adhesive used is KH550.

[0090] Example 15

[0091] The difference between Example 15 and Example 11 is that steps 1 and 3 are omitted. The specific process is as follows:

[0092] Weigh 2.3 kg of porous silica aerogel, 0.5 kg of adhesive, 0.01 kg of OP-10, and 10 kg of anhydrous ethanol and mix them evenly to obtain solution A. Weigh 10 kg of water and 0.002 kg of initiator and mix them evenly to obtain solution B. Mix all of solution A and all of solution B evenly to obtain the heat preservation agent.

[0093] The double-layer fabric is then conveyed to a tank containing a 30°C heat-retaining agent, where it is completely submerged for 5 minutes at a conveying speed of 1 m / min. It is then conveyed to a two-roller extrusion device to squeeze out the water and ethanol trapped within the soaked fabric, maintaining the adhesive wet weight of the fabric at 180 g / m². 2The material is then transferred to a 60°C oven for 5 seconds for initial curing, forming a thermal insulation film. Next, it is transferred to a vacuum drying device and dried under vacuum conditions at -0.1 MPa and 101°C for 5 minutes, creating several pores in the thermal insulation film to obtain a thermally insulating porous fabric.

[0094] Example 16

[0095] The difference between Example 16 and Example 11 is that the porous silica aerogel is replaced in equal amounts with nano-silica with an average particle size of 50nm.

[0096] Example 17

[0097] The difference between Example 17 and Example 12 is that the adhesive is obtained by mixing 0.8 kg of 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 0.1 kg of methacryloyloxyethyl maleic acid monoester, and 0.8 kg of ethoxyethoxyethyl acrylate; the heat-insulating agent is prepared by the following method:

[0098] Weigh 3.6 kg of porous silica aerogel, 0.8 kg of adhesive, 0.03 kg of OP-10, and 10 kg of anhydrous ethanol and mix them evenly to obtain solution A. Weigh 20 kg of water and 0.002 kg of initiator and mix them evenly to obtain solution B. Mix all of solution A and all of solution B evenly, then heat to 62°C and react for 30 min to allow for a preliminary reaction. Then adjust the pH value to 7 to obtain the heat preservation agent.

[0099] Example 18

[0100] The difference between Example 18 and Example 12 is that the adhesive is prepared by mixing 1.5 kg of 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 0.3 kg of methacryloyloxyethyl maleic acid monoester, and 0.1 kg of ethoxyethoxyethyl acrylate.

[0101] Example 19

[0102] The difference between Example 19 and Example 17 is that methacryloyloxyethyl maleic acid monoester is replaced with 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane.

[0103] Example 20

[0104] The difference between Example 20 and Example 17 is that ethoxyethoxyethyl acrylate is replaced in equal amounts with 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane.

[0105] Comparative Example

[0106] Comparative Example 1

[0107] The difference between Comparative Example 1 and Example 1 is that viscose fiber was replaced with modal in equal amounts.

[0108] Comparative Example 2

[0109] The difference between Comparative Example 2 and Example 1 is that nylon was replaced with cotton in equal amounts.

[0110] Comparative Example 3

[0111] The difference between Comparative Example 3 and Example 1 is that nylon is replaced with an equal amount of polyester.

[0112] Comparative Example 4

[0113] The difference between Comparative Example 4 and Example 1 is that nylon was replaced with spandex in equal amounts.

[0114] Comparative Example 5

[0115] The difference between Comparative Example 5 and Example 1 is that it contains 15% acrylic fiber and 85% viscose fiber.

[0116] Comparative Example 6

[0117] The difference between Comparative Example 6 and Example 1 is that it contains 85% acrylic fiber and 15% viscose fiber.

[0118] Performance testing

[0119] Detection methods / test methods

[0120] Moisture wicking: GB / T 21655.1-2008, moisture permeability;

[0121] Air permeability: GB / T 5453-1997;

[0122] Thermal insulation rate: GB / T 11048-1989 Method A;

[0123] Abrasion resistance: Referring to the mass loss of ASTM D4966-2012 "Determination of the abrasion resistance of fabrics by the Martindale method for textiles", the surface of the double-layer fabric was rubbed 1300 times, 2000 times, and 3000 times with a pressure of 9 kPa, and the degree of surface wear was checked: light, moderate, and heavy.

[0124] All the above experiments were conducted 5 times, and the average value was taken. The specific data are shown in Table 1.

[0125] Table 1. Experimental data of Examples 1-22 and Comparative Examples 1-6

[0126]

[0127]

[0128]

[0129] Based on Example 1 and Comparative Examples 1-4, and in conjunction with Table 1, it can be seen that the warmth retention, air permeability, and moisture permeability of Example 1 are all higher than those of Comparative Examples 1 and 3-4. The warmth retention, air permeability, and moisture permeability of Example 1 are not much different from those of Comparative Example 2. However, Comparative Example 2 is prone to wear. This indicates that the nylon and viscose fiber blend used in this application has better air permeability, moisture permeability, abrasion resistance, and warmth retention.

[0130] Based on Example 1 and Comparative Examples 5-6 and Table 1, it can be seen that the air permeability and moisture permeability of Comparative Examples 5-6 are lower than those of Example 1, while the warmth retention rate of Comparative Example 6 is not much different from that of Example 1. This indicates that the double-layer fabric obtained by using nylon and viscose fiber blends in this application has good air permeability, moisture permeability, abrasion resistance and warmth retention.

[0131] Comparing Example 11 and Example 10 and referring to Table 1, it can be seen that the air permeability and moisture permeability of Example 11 are not much different from those of Example 10, but the heat retention rate and abrasion resistance are significantly improved. This indicates that the heat-insulating fabric obtained by the heat-insulating treatment process of this application has better heat retention and abrasion resistance, as well as better air permeability and moisture permeability.

[0132] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A warm and breathable double-layer fabric, comprising an outer layer and an inner layer, wherein the outer layer and the inner layer are connected by a connecting thread, and both the outer layer and the inner layer are knitted fabrics, characterized in that, Both the outer layer and the inner layer are composed of 20-70% acrylic fiber, 25-80% viscose fiber, 0-25% spandex, 0-25% modal, 0-25% polyester, and 0-36% natural fibers; the natural fibers are one or more of mulberry silk, sheep wool, rabbit hair, cashmere, camel hair, and cotton. The double-layer fabric is a heat-insulating double-layer fabric, which is obtained by the following method: Step 1: Place the double-layer fabric into the first active liquid for activation treatment, so that the fabric is saturated with water, and then dry it so that the surface humidity of the double-layer fabric reaches 45-55%, thus obtaining the activated fabric. Step 2: Weigh 2.3-3.6 parts of porous silica aerogel, 0.5-0.8 parts of adhesive, 0.01-0.03 parts of OP-10, 0.002-0.003 parts of initiator, and 20-30 parts of solvent, mix them evenly to obtain a thermal insulation agent; then immerse the activated fabric in the thermal insulation agent, take it out, heat it to 60-65℃, pre-cur it for 5-10 seconds, and initially form a thermal insulation film. At 101-103℃, vacuum dry it for 3-5 minutes to form several pores in the thermal insulation film, and obtain a thermal insulation porous fabric; Step 3: Immerse the thermally insulating porous fabric in the second active liquid and dry it to obtain a double-layered fabric with thermal insulation treatment; The adhesive is composed of the following raw materials in parts by weight: 0.8-1.5 parts of 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane 0.1-0.3 parts of methacryloyloxyethyl maleic acid monoester 0.1-0.8 parts of ethoxyethoxyethyl acrylate; The first active solution is composed of methacryloylethyl sulfobetaine and water; the second active solution is composed of cocamidopropylamine oxide, water, and anhydrous ethanol.

2. The double-layer fabric for warmth and breathability according to claim 1, characterized in that: Both the outer layer and the inner layer are composed of 25% acrylic fiber, 60% viscose fiber, and 15% spandex.

3. The warm and breathable double-layer fabric according to claim 1, characterized in that: Both the outer layer and the inner layer are composed of 25-36% acrylic fiber, 10% spandex, 36% viscose fiber, 0-25% modal, 0-25% polyester, and 4% natural fiber.

4. The warm and breathable double-layer fabric according to claim 1, characterized in that: The surface layer has a basis weight of 280-300 g / m². 2 .

5. The warm and breathable double-layer fabric according to claim 1, characterized in that: The connecting wire is made of spandex.

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