Knitted fabric capable of directional guide and rapid evaporation of sweat and design method therefor

Abstract

A lightweight, warm-keeping, dry and comfortable quick-drying sports fabric, comprising a fabric body, which is a jacquard towel structure by interweaving at least two yams having different moisture conductivities; the fabric body comprises a first yarn (y1) and a second yarn (y2), and the moisture conductivity of the first yarn (y1) is greater than the moisture conductivity of the second yam (Y2) ; the front surface of the fabric body is a plane structure composed of the first yam (y1); the back surface of the fabric body is a jacquard structure having several discontinuous raised piles( A1) , and each raised pile( A1) is a looped pile composed of the second yam (y2); a first air-permeable region (A2) is provided between each two longitudinally adjacent raised piles (A1); a second air-permeable region (A3) is provided each two laterally adjacent raised piles (A1); and the one way transport capability OWTC of liquid moisture of the fabric body is greater than 100%. The fabric body is light and air-permcable, and has the characteristics of quick drying and warm keeping, and being capable of keeping dry and comfortable of the skin of a human body.

Description

[0001] The present invention discloses a knitted fabric capable of directionally controlling sweat transfer within the fabric from top to bottom and from inside to outside according to a designed direction, and evaporating it on the outer fabric surface, thereby achieving rapid heat dissipation by fully utilizing the outer fabric surface for sweat diffusion and evaporation. The fabric is composed of at least two yarns, Y1 and Y2. For yarn Y1, the contact angle θ1 ≥ 65°, DPFY1 ≤ 2.0; for yarn Y2, the contact angle θ2 ≤ 90°, DPFY2 ≤ 1.5; and the moisture regain of yarn Y1≤ 5%. One fabric side presents a strip-shaped 3D structure, where protruding parts form high areas labeled a1, and a space between two adjacent high areas forms a low area labeled a2, . The areas a1 have a width W1, where 0.1 ≤ W1 ≤ 10 cm, using yarn Y1; the areas a2 have a width W2, where 0.2 ≤ W2 ≤ 5 cm, using yarn Y2, and θ2 < θ1 on the same fabric. This knitted fabric helps draw sweat accumulated on the skin surface away from the skin during high-intensity exercise. Part of the sweat can be transferred from the fabric's skin-contact surface to the outer fabric surface for diffusion and evaporation, while the remaining sweat naturally flows out of the garment along channels formed by the areas a2 under the action of gravity. This reduces the adhesion of the garment fabric to the skin under high sweating conditions and minimizes the weight increase due to sweat absorption while maintaining high heat dissipation.Technical Field

[0002] This invention relates to a design method for a knitted fabric capable of directional sweat guidance and rapid evaporation. The knitted fabric designed by this method has a micro - texture effect when people are highly physically active and sweating heavily, enabling directional control of sweat transfer to keep the skin dry, provide excellent evaporation and heat dissipation, and reduce fiber material weight gain due to moisture absorption.Background

[0003] Dan Cao&Yongjin Wang pointed out in the article "Questionnaire Survey Based on the Design of Men's Functional Running Pants" (Journal of Wuhan Textile University, VOL29, NO.1,Feb.2016. P.10): less than 50% of the respondents are satisfied with the functions of the currently purchased running pants. The parts most likely to sweat when wearing running pants are the lower back, inner thighs, buttocks, abdomen, knee socket, back thigh, front thigh, back calf, and front calf; the parts most likely to get hot when wearing running pants are the lower back, inner thigh, buttocks, back thigh, abdomen, knee socket, front thigh, back calf, and front calf. Its research also pointed out that consumers are most concerned about the moisture-wicking and tactile comfort of running pants, followed by pressure comfort, while the selection rate for factors such as warmth and wind resistance is relatively low. As we all know, the human body produces a large amount of sweat during exercise. At this time, the skin will feel sticky when it comes into contact with clothing, and the sweat will evaporate slowly, which will cause a stuffy feeling. At the same time, under the premise of long-term and high-intensity exercise, people sweat a lot.

[0004] According to reports (https: / / baijiahao.baidu.com / s?id=1659037479910670348&wfr=spider&for=pc) : According to relevant research, a full marathon is 42.195 kilometers. Under such exercise, the amount of sweat per hour for ordinary runners can reach 1000ml. According to the GB / T 21655.1-2008 standard, one of the current indicators of moisture-absorbing and quick-drying fabrics requires the evaporation rate to be greater than 0.18ml / hr. Based on the sample fabric size of 10×10cm and the evaporation rate of 0.18ml / hr, if you want to evaporate 1000ml of sweat per hour, you will need about 55.6 square meters of fabric area. Even if the evaporation rate of the fabric reaches 0.60ml / hr, you will still need nearly 17 square meters of fabric area. It can be seen that during high-intensity exercise, a large amount of sweat cannot evaporate in time, or be absorbed into the fabric, or fall to the ground.

[0005] Much literature has been discussed regarding the reuse of sweat. From the perspective of sports science, how to use sweat to maximize the heat dissipation advantages caused by its evaporation, while also avoiding the weight gain and moisture absorption and heating caused by the fabric absorbing a large amount of water, is a current research entry point. Therefore, for the design and development of sports fabrics, an important direction is to pursue how to reasonably eliminate a large amount of sweat generated during exercise in a timely manner and maintain a refreshing feeling.

[0006] At present, the moisture absorption and quick-drying function is a research direction, and it is often disclosed in patent documents: CN115029795A, ramie fiber moisture-absorbing and quick-drying fabric and its preparation specifically discloses a ramie fiber moisture-absorbing and quick-drying fabric and its preparation method. The preparation method of ramie fiber moisture-absorbing and quick-drying fabrics includes the following steps: Step 1), prepare a degumming bacterial solution; Step 2), mix ramie and water, keep the temperature constant at 30-32°C, inoculate the degumming bacterial solution in the water, the inoculation quality of the degumming bacterial solution is 1-2% of the quality of the clean water, then inject oxygen into the water, and perform degumming treatment for 60-62 hours to obtain pretreated fiber; Step 3), put the pretreated fiber into clean water, then add ozone to the clean water, perform bleaching treatment, filter and dry to obtain ramie fiber; Step 4), spin the ramie fiber and weave it to obtain ramie fiber moisture-absorbing and quick-drying fabric; the degumming bacterial solution is composed of culture solution, Bacillus subtilis, Clostridium fexinia, and Flavobacterium pectophaga, and the OD value of the degumming bacterial solution is 10-12. The invention has the advantage of reducing the discomfort caused by the fabric sticking to the body.

[0007] CN115029838A discloses a production process of a moisture-absorbing and quick-drying antibacterial knitted stretch denim fabric. By blending jute fiber, moisture-absorbing and quick-drying fiber, spandex elastic yarn, and cotton blended colored yarn in proportion, it is processed into a fabric that solves the problem of traditional denim fabrics with many advantages such as firmness, good wear resistance, and long service life. However, the denim clothing produced has shortcomings such as poor air permeability, poor hygroscopicity, no antibacterial properties, and poor quick-drying performance. Fabrics processed by blending jute fiber, moisture-absorbing and quick-drying fiber, spandex elastic yarn, and cotton blended colored yarn have good antibacterial properties, breathability, anti-mite properties, and quick-drying properties.

[0008] There are several ways to achieve differentiated moisture-wicking fabrics, such as: 1. Use post-finishing methods such as printing and lamination to achieve differentiated moisture conduction; Patent CN103009763 B, "A single-parent, single-proof, moisture-absorbing and quick-drying fabric and its production method", provides a treatment method: hydrophilic treatment of the entire fabric, printing of discontinuous water-repellent areas on the back of the fabric, and water-repellent coating treatment on the front of the fabric. This method can make the fabric have good moisture absorption and quick-drying performance, and the outer surface will not absorb sweat and produce obvious sweat marks. Patent CN104786576 B, "A one-way moisture-conducting fabric structure", discloses a one-way moisture-conducting weft-knitted fabric structure with a porous silica gel pattern on the outer surface that can absorb a large amount of water and a cotton and linen blended fabric on the inner surface that is easy to keep dry. 2. Use functional yarns or utilize the water conduction capacity of different yarns to achieve differentiated moisture conduction; Patent CN 1985036A, "Woven fabric with moisture management properties", reports a woven fabric composed of a generally uniform woven structure of hydrophobic and hydrophilic materials, and having internal and external exposed surfaces of hydrophobic and hydrophilic materials. Thus, a one-way transfer of sweat from the bottom of the fabric to the surface of the fabric is achieved. Patent application CN201710717764.6, "A moisture-conducting quick-drying knitted weft-knitted fabric and its processing technology", provides a moisture-conducting quick-drying knitted weft-knitted fabric made of at least two yarns with different DPFs, and the different moisture-conducting capabilities of the two sides of the fabric are achieved by designing the floating lengths of the two different DPF yarns on the two sides of the fabric. 3. Double-sided equipment is used to make the front and back sides of the fabric have different water-conducting properties; Patent application CN106012538 A, "Method for producing a moisture-absorbing, quick-drying, one-way moisture-conducting double-layer fabric", reports a method of weaving a double-layer fabric grey cloth with cationic polyester yarn and polyester filament, and then treating the double-layer fabric grey cloth with a modified refining agent LS01 to produce a moisture-absorbing, quick-drying, one-way moisture-conducting fabric.

[0009] At present, the effect of using yarn with moisture-conducting and quick-drying properties or using post-finishing methods to achieve this effect will gradually weaken or even disappear with the increase in the number of washes, and it is not conducive to environmental protection. Double-layer / triple-layer fabrics have obvious differentiation effects, but they are thicker and heavier than single-layer fabrics, which has greater limitations in terms of breathability and wearing comfort. In addition, the impact of moisture absorption and weight gain of high-performance sportswear on athletic performance, especially on endurance sports performance, is still in its infancy.

[0010] In summary, although the differentiated moisture conduction function of fabrics has been widely studied, there are few reports on the use of knitted fabrics to not only effectively remove sweat from the skin surface, but also maximize its evaporation to achieve effective heat dissipation and minimize the increase in load caused by weight gain.

[0011] Through the search and research of prior art, it is found that the following two issues have not been deeply studied in the industry: (1) How to reduce the heat and weight gain caused by moisture absorption when the fabric reaches saturation, which in turn affects the performance, especially in endurance sports. (2) How to effectively improve the efficiency of evaporative heat dissipation and use the evaporation of sweat to effectively remove heat. Summary of the Invention

[0012] Through research, the inventors found that the material's ability to absorb moisture and release heat is related to the moisture regain of the fiber. Previous studies have confirmed that the hydrophilic groups in the fiber molecules combine with water molecules, reducing the kinetic energy of the water molecules and converting them into heat energy for release. Usually, the hygroscopic and heat-generating performance is closely related to the moisture regain of the fiber. The larger the moisture regain of the fiber, the better the hygroscopic and heat-generating performance, while the smaller the moisture regain, the worse the hygroscopic and heat-generating performance. For example, wool and modal fibers have good hygroscopic and heat-generating effects. Ordinary acrylic and polyester fibers have poor moisture absorption and heat generation effects. Therefore, the use of fiber materials with low moisture regain will have three advantages: (1) reduce the moisture absorption and heat generation effect; (2) reduce the weight increase of fiber materials due to moisture absorption; (3) because the moisture is on the outer surface of the fiber, it is more conducive to accelerating evaporation by using the convection of moving air.

[0013] According to GB21655.1-2008, the moisture content of fabrics can be measured and the moisture content of quick-drying fabrics according to this standard is required to be at least 200%. This also means that the weight of fabrics that meet the standard after being fully wetted is at least 200% of the nominal weight. This is also a major challenge for extreme athletes. Analysis of the reasons for the weight gain of fabrics after wetting, in addition to the moisture that enters the fiber due to the regain, another part is the moisture that exists between fibers and enters the fabric structure due to the capillary effect. By controlling the number of capillaries in the yarn, and the equivalent characteristics of the capillaries such as surface energy (contact angle), the equivalent radius can control the water transfer distance and amount, thereby affecting the moisture content of the fabric and reducing the weight by reducing the moisture content of the fabric.

[0014] The present invention will be further described based on the accompanying drawings and examples.Brief Description of Drawings

[0015] FIG1 is a schematic diagram of the structural features of the fabric of the present invention; FIG2 is a schematic diagram showing the principle of the fabric of the present invention to achieve its technical effect; FIG. 3 is a photograph of a fabric of the present invention.

[0016] As shown in Figures 1 and 2, the important features of the fabric of the present invention include: (1) The overall moisture regain of the fabric is very low, less than 5%, preferably less than 1.5%, which can reduce the moisture absorption and heating effect of the fabric and reduce moisture absorption and weight gain; (2) The material used on the skin-contacting surface has a large contact angle, which is convenient for sweat to roll on its surface and reduce the chance of sticking; (3) The material used on the clothing surface (i.e. the other side relative to the skin-contacting surface) has a small contact angle, which is convenient for sweat to be absorbed by it and diffused over a larger range on the clothing surface to improve evaporation efficiency; (4) The material used for the skin-contacting surface has a large contact angle and is a discontinuous and uniform hydrophobic surface, thereby forming open grooves, the bottom of which is constructed of a hydrophilic clothing surface material, and the two walls are constructed of a hydrophobic skin-contacting surface material. In addition, when worn, the grooves are not parallel to the horizontal plane, so that the gravity of sweat droplets can be used to make sweat flow out of the fabric, thereby reducing the probability of sweat being absorbed and stuck to the hydrophilic groove bottom.

[0017] When sweat accumulates on the skin surface, the size of a sweat droplet varies. In life, the size of a sweat droplet is described as millet-shaped, sesame-shaped or soybean-shaped (https: / / zhidao.baidu.com / question / 1435837061132728219.html); combined with the structural design of the fabric, there are three possible contact situations between a sweat droplet and the fabric: (1) When the sweat droplet is in the groove, the sweat is attracted by the hydrophilic clothing surface a2 and diffuses and evaporates on the clothing surface, and the sweat that is not attracted flows downward along the groove until it flows out of the clothing; (2) If the sweat drop is partially in the groove and partially on the hydrophobic skin-contacting surface a1, the sweat on the hydrophobic skin-contacting surface a1 is attracted by the hydrophilic clothing surface a2, and the sweat on the hydrophobic skin-contacting surface a1 is more likely to flow into the hydrophilic clothing surface a2; the sweat still remaining on the hydrophobic skin-contacting surface a1 may slide down along the hydrophobic skin-contacting surface a1; (3) If the sweat drop is completely on the hydrophobic skin-contacting surface a1, the sweat slides down under the action of gravity.

[0018] This also provides certain data support for the width of the groove and the size of the discontinuous hydrophobic area in the fabric design of this study. At the same time, it combines wearing comfort and sports experience. This study is finally summarized as follows: A method that can control the direction of sweat in the fabric to transfer the sweat from top to bottom and from inside to outside in the designed direction and evaporate it effectively on the clothing surface, so as to avoid the weight gain of the fabric caused by absorbing a large amount of sweat during high-intensity exercise, and can fully utilize the clothing surface of the fabric for the diffusion and evaporation of sweat to achieve the effect of rapid heat dissipation. Compared with fabrics made entirely of materials with a moisture regain of 0%, sweat cannot be absorbed and evaporated to a certain extent.

[0019] Although it can well achieve the difficulty of sweat wetting the fabric and not gaining weight during high-intensity exercise, it cannot take advantage of the heat dissipation benefits brought by the evaporation of sweat. It is well known in the industry that the latent heat of evaporation of water at 25°C is 44KJ / mol.

[0020] Therefore, after fully analyzing the relationship between exercise load and function, the fabric features designed by the present invention are: At least two yarns (Y1 and Y2), the contact angle θ1 of the Y1 yarn is ≥65° , DPFY1≤2.0, and the contact angle θ2 of the Y2 yarn≤90° , DPFY2≤1.5.

[0021] The DPF data in the yarn is used to control the number of capillaries in the yarn and the size of the equivalent diameter of the capillaries to achieve the control of the water transport capacity and water transport amount of the yarn.

[0022] Moisture regain is an important parameter in this study, which is used to control the weight gain of the fabric. The moisture regain of the Y1 yarn (MR1) ≤5%.

[0023] As shown in FIG1 , the structural feature is that one fabric surface of the fabric is a strip-shaped 3D structure, the raised parts form high areas labeled a 1 , a 1 hasa width W1, and combined with the analysis of the size of a single sweat and the possibility of continuous sweat, 0.1≤W1≤10 cm is set, and the space between two adjacent high areas forms a low area labeled a2,a2 has a width W2, where 0.2≤W2≤5 cm; the a1 area uses Y1 yarn, and the a2 area uses Y2 yarn, and on the same piece of fabric, θ2<θ1; the knitted fabric formed thereby can help to draw sweat accumulated on the skin surface away from the skin during high-intensity exercise, part of the sweat can diffuse and evaporate from the skin-contacting surface of the fabric and on the clothing surface, and part of the sweat naturally flows out of the clothing along the channel formed in the a2 area under the action of gravity, so that the clothing can reduce the adhesion of the fabric to the skin under high sweating conditions, and can still reduce the weight of the fabric increased due to sweating while maintaining high heat dissipation.

[0024] Y1 and Y2 are chemical fibers, preferably with a yarn moisture regain of ≤ 1.5% and a yarn liquid water conductivity LPY2: LPY1 ≥2.0; further, one of Y1 or Y2 is a natural fiber or a natural fiber blended yarn, with a yarn moisture regain of ≤15%, a yarn liquid water conductivity LPY2:LPY1 ≥2.0 and a total content of the fiber in the fabric of less than 30%, thereby further improving the wearing experience of the fabric.

[0025] The knitted fabric may be a weft-knitted single-sided fabric, and the width ratio of the high and low areas is 0.10≤W1:W2≤2.5, preferably 0.5≤W1:W2≤ 0.75.

[0026] The knitted fabric may be a weft-knitted double-sided fabric, and W2 preferably covers 100% of the fabric clothing surface.

[0027] The weft-knitted double-sided fabric has a jacquard rib structure, and the jacquard is double-sided.

[0028] Through holes are designed in areas a2, and the total area occupied by all through holes is ≤50% of the total area of a2. Such a design further improves the moisture permeability and vapor permeability of the fabric during use, and is more conducive to the evaporation of sweat from the microenvironment of human clothing into the outside world.

[0029] In order to make full use of the gravity of sweat droplets in clothing design to discharge sweat from top to bottom, the fabric requires that the angle (θ3) between areas a2 and the horizontal plane is 30° ≤θ3≤150° , and preferably θ3 is 90° .

[0030] Taking into account the requirement for beautifying the appearance of the fabric, the 3D surface of the fabric can be designed as a clothing surface during use. Under this condition, the contact angle θ1 of the Y1 yarn≤65° , DPFY1≤1.5, the contact angle θ2 of the Y2 yarn≥65° , DPFY2≤2.0, and the moisture regain (MR2) of the Y2 yarn≤5%; the structural feature is that the clothing surface of the fabric is a strip-shaped 3D structure to increase the evaporation area and appearance micro-texture of the fabric.

[0031] In the field of textiles and in the context of the present invention, "yarn" refers to a continuous linear object made of various textile fibers as raw materials. Yarn is mainly used for weaving woven fabrics, knitted fabrics, braided fabrics and some non-woven fabrics. "yarn" is a slender object with a certain strength and linear density formed by arranging many short fibers or filaments in an approximately parallel state and twisting them along the axial direction; while "thread" is a strand formed by twisting two or more single yarns. "DPF of yarn" is a unit for measuring the fineness of a single fiber of yarn. It is the D / F value, where D is the weight of the yarn per unit length, and F is the number of fibers per unit length of yarn.

[0032] "Hygroscopic and heat-generating effect of fabrics", generally speaking, the heat-generating performance of hygroscopic and heat-generating fibers is related to their moisture regain. If the moisture regain is high, the hygroscopic and heat-generating performance is excellent; otherwise, it is poor. Inspired by this, people have developed hygroscopic and heat-generating fibers. The mechanism of fiber heat generation due to moisture absorption is generally believed to be that when the fiber absorbs water, the fiber molecules and water molecules attract each other and combine, and the kinetic energy of the water molecules is reduced and converted into heat (energy) and released. In addition, in order to enhance the heat generation effect, a certain substance can be added inside the fiber or coated on the fiber surface. When the fiber absorbs water, the substance is triggered to undergo a chemical reaction and release more heat. Its performance can be measured according to the standard: GB / T 29866-2013 Test method for moisture absorption and heat generation of textiles.

[0033] "Contact angle" is the contact angle of a liquid on the surface of a solid material, and is an important parameter for measuring the wettability of the liquid to the surface of the material. By measuring the contact angle, a lot of information about the interaction between the solid-liquid and solid-gas interfaces on the surface of the material can be obtained. The contact angle measurement technology can not only be used for the surface properties of common characterization materials, but also has important applications in the fields of petroleum industry, flotation industry, pharmaceutical materials, chip industry, low surface energy non-toxic antifouling materials, inks, cosmetics, pesticides, printing and dyeing, papermaking, fabric finishing, detergents, spraying, sewage treatment, etc. If θ<90°, the solid surface is hydrophilic, that is, the liquid is easier to wet the solid, and the smaller the angle, the better the wettability; if θ>90°, the solid surface is hydrophobic, that is, the liquid is not easy to wet the solid, and it is easy to move on the surface. As for whether the liquid can enter the capillary, this is also related to the specific liquid, and not all liquids do not enter the capillary at a larger angle. The wetting process is related to the interfacial tension of the system.

[0034] In the context of the textile industry and the present invention, "contact angle" can be used to indicate the hydrophobicity and hydrophilicity of a yarn. If θ < 90°, the surface of the yarn is hydrophilic, i.e., liquid wets the yarn more easily, and the smaller the angle, the better the wettability; if θ > 90°, the surface of the yarn is hydrophobic, i.e., liquid does not wet the yarn easily and moves easily on its surface.

[0035] "Micro-texture effect" refers to a description of the texture of a fabric. The characteristic of textured fabrics is that the fabric is made into uneven but regular undulations by thread or other means. The morphological beauty of clothing fabrics is mainly reflected in the texture of the material. The texture is a different psychological feeling given by touch, such as: rough and smooth, soft and hard, light and heavy, etc. The visual effect of the texture can not only enrich the morphological expression of the fabric, but also has dynamic and creative expressionist aesthetic characteristics.

[0036] "Moisture regain" refers to the moisture regain of yarn, that is, the public moisture regain of yarn, which indicates the moisture content of each component raw material of the yarn under standard conditions. Its value is equal to the standard moisture regain of each raw material multiplied by its percentage content.

[0037] "Capillaries of yarn" refers to the capillaries formed by the gaps between fibers in the yarn. The shape and number of these capillaries determine the water conduction capacity of the yarn.

[0038] The performance testing method of the fabric is as follows: (1) Sweat residual rate a) Prepare two samples of fabric according to 12×10 cm, one of which has a long side parallel to the low areas a2, denoted as S1; the other has a long side perpendicular to the low areas a2, denoted as S2; weigh the samples after balancing to obtain the initial weights WS1 and WS2; b) 1 cm from the top and bottom of the short side is the hanging area. The sample is hung with the skin-contacting side facing upwards. The clamps clamp the top and bottom clamping areas of the sample respectively and clamp the sample at a horizontal angle of 75 degrees with a pre-tension of 0.5N; c) 3 ml of water is injected into the sample surface 1 cm high with a syringe within 5 seconds at a position 2 cm from the upper short side and 5 cm from the long side; d) WS1a and WS2a are weighed immediately after the injection; e) The parallel sweat residual rate (WS1a-WS1) / WS1*100% is calculated, and the vertical sweat residual rate (WS2a-WS2) / WS2*100% is calculated. (2) Other functional characteristics, such as unidirectional moisture conduction performance according to GB21655.2-2019, and evaporation rate according to GB21655.1-2008. Description of Embodiments

[0039] The technical scheme in the embodiment of the present application will be clearly and completely described below in conjunction with the fabric structure principle diagram of FIG. 1 and the working principle diagram of the invention of FIG. 2. Obviously, the described embodiment is only a part of the embodiment of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present application.Example 1

[0040] The first yarn Y1 is made of polyester fiber (PES 40D / 24F SD DTY) with water repellent function, and the second yarn Y2 is made of ordinary polyester fiber (PES 50D / 72F SD DTY). Among them, DPFY1=1.6, the contact angle θ1 of the Y1 yarn is 135°, and the moisture regain MR1 of the Y1 yarn is 0.45%; DPFY2=0.69, the contact angle θ2 of the Y2 yarn is 55°, and the moisture regain MR2 of the Y2 yarn is 0.45%, and LPY1:LPY2>2.0 applies. The two yarns Y1 and Y2 are interwoven to form a weft-knitted single-sided jacquard fabric. The skin-contacting surface of the fabric made of the first yarn Y1 forms a strip-shaped 3D structure, and the high area formed by the raised 3D strip-shaped part has a width W1, and at this time W1=0.3cm. The space between two adjacent high areas made of the second yarn Y2 forms a low area, whose width is W2, and W2 = 0.5 cm. Therefore, the fabric body θ2 < θ1, W1: W2 = 0.6.

[0041] According to the test method of the fabric performance of the present invention, the sweat residual rate test is carried out: 1) Two samples of fabric are prepared according to 12×10 cm, one of which has a long side parallel to the low areas a2, denoted as S1; The other has a long side perpendicular to the low areas a2, denoted as S2; after balancing, the samples are weighed to obtain initial weights WS1=2.55g and WS2=2.55g; 2) 1 cm from the top and bottom of the short side is the hanging area. The sample is hung with the skin-contacting side facing upwards. The clamps clamp the top and bottom clamping areas of the sample respectively and clamp the sample at a horizontal angle of 75 degrees with a pre-tension of 0.5N; 3) At a position of 2 cm from the upper short side and 5 cm from the long side of the sample, 3 ml of water is injected at a height of 1 cm from the sample surface within 5 seconds using a syringe; 4) After the injection is completed, WS1a is weighed immediately to obtain 3.36 g and WS2a is weighed to obtain 4.27 g; 5) Calculate the parallel sweat residual rate (WS1a-WS1) / WS1*100%=(3.36-2.55) / 2.55*100%=32%.

[0042] From the above measurement data, it can be obtained that the hanging method of sample S1 is more convenient for sweat to slide down because the groove method is at an angle of 75 degrees to the horizontal plane and the two walls of the groove are composed of hydrophobic yarn. In the set flow process, about 0.81 g of water is absorbed by the fabric. 2.19g of water flows out of the sample; in contrast, for the same fabric, when the direction of the groove is parallel to the horizontal plane, since the sweat needs to continuously overcome the obstacles of multiple grooves to flow out of the sample, the chance of sweat diffusing in the groove in the horizontal direction is increased, but the chance of flowing out of the sample is reduced. From the test results, it can be obtained that about 1.72g of water is absorbed by the fabric; 1.28g of water flows out of the sample.

[0043] The knitted fabric thus formed can reasonably use the groove direction to help draw the sweat accumulated on the skin surface away from the skin during high-intensity exercise. Part of the sweat can diffuse and evaporate from the skin-contacting surface of the fabric and the clothing surface, and part of the sweat naturally flows along the channel formed in the low area under the action of gravity and is guided out of the clothing, so that the clothing can reduce the adhesion of the fabric to the skin under high sweating conditions, and can still reduce the weight of the fabric increased due to sweating while maintaining high heat dissipation. The fabric was measured according to the standard AATCC 195 "Liquid Moisture Management Properties of Textile Fabrics". The one-way moisture conduction capacity OWTC (one way transport capability) of the fabric body measured this time is 648%.Comparative Example 1

[0044] The first yarn Y1 is made of ordinary polyester fiber (PES 40 / 24F SD DTY), and the second yarn Y2 is made of ordinary polyester fiber (PES 50D / 72F SD DTY). Wherein, DPFY1=1.6, the contact angle θ1 of the Y1 yarn is 75°, and the moisture regain MR1 of the Y1 yarn is 0.45%; DPFY2=0.69, the contact angle θ2 of the Y2 yarn is 55°, and the moisture regain MR2 of the Y2 yarn is 0.45%, and LPY1:LPY2>2.0. For the calculation method of the water conduction capacity of the yarn, please refer to the first application of the inventor (a method for designing differential water conduction fabrics based on the capillary water conduction capacity of the fabric, CN201811089055.9). The two yarns Y1 and Y2 are interwoven to form a weft-knitted single-sided jacquard fabric. The skin-contacting surface of the fabric made of the first yarn Y1 forms a strip-shaped 3D structure. The high area formed by the raised 3D strip-shaped part has a width W1, and W1 = 0.3 cm. The space between two adjacent high areas made of the second yarn Y2 forms a low area, and its width is W2, and W2 = 0.5 cm. Therefore, the fabric body θ2 < θ1, W1: W2 = 0.6. 1) Prepare two samples of fabric with a size of 12×10 cm, one of which has its long side parallel to the low areas a2, denoted as S1; The other has its long side perpendicular to the low areas a2, denoted as S2; weigh the samples after balancing to obtain initial weights WS1=2.55g and WS2=2.55g; 2) 1 cm from the top and bottom of the short side is the hanging area. The sample is hung with the skin-contacting side facing upwards. The clamps clamp the top and bottom clamping areas of the sample respectively and clamp the sample at a horizontal angle of 75 degrees with a pre-tension of 0.5N; 3) At a position of 2 cm from the upper short side and 5 cm from the long side of the sample, 3 ml of water is injected into the sample surface 1 cm high within 5 seconds using a syringe; 4) After the injection is completed, WS1aa=5.06g and WS2aa=5.32g are weighed immediately; 5) Calculate the parallel sweat residual rate (WS1aa-WS1) / WS1*100%=(5.06-2.55) / 2.55*100%=98% The vertical sweat residual rate was calculated as (WS2aa-WS2) / WS2*100%=(5.32-2.55) / 2.55*100%=108%.

[0045] By comparing the two, it can be seen that the fabric designed by the present invention helps to draw sweat accumulated on the skin surface away from the skin, part of the sweat can be diffused and evaporated from the skin-contacting surface of the fabric and the clothing surface, and part of the sweat naturally flows along the channel formed in the low area under the action of gravity and is discharged from the clothing, so that the clothing can reduce the adhesion of the fabric to the skin under high sweating conditions, and can still reduce the weight of the fabric increased due to sweating while maintaining high heat dissipation.Example 2

[0046] The first yarn Y1 is made of polyamide fiber (PA6 30D / 12F SD DTY) with water repellent function, and the second yarn Y2 is made of ordinary polyamide fiber (PA6 40D / 68F SD DTY). Among them, DPFY1=2.5, the contact angle θ1 of Y1 yarn=125°, and the moisture regain MR1 of Y1 yarn is 1.9%; DPFY2=0.56, the contact angle θ2 of Y2 yarn=50°, and the moisture regain MR2 of Y2 yarn is 4.5%, and LPY1:LPY2>2.0. For the calculation method of the water conduction capacity of the yarn, please refer to the first application of the inventor (design method of differential water conduction fabric based on the capillary water conduction capacity of the fabric, CN201811089055.9). The two yarns Y1 and Y2 are interwoven to form a weft-knitted double-sided jacquard fabric. The first yarn Y1 is used to form a strip-shaped 3D structure on the skin-contacting surface of the fabric body. The high area formed by the raised 3D strip-shaped part has a width Wa, and Wa = 0.2 cm at this time. The space between two adjacent high areas on the skin-contacting surface formed by the second yarn Y2 forms a low area with a width of Wb, and Wb = 0.4 cm at this time. At the same time, the second yarn Y2 is used to form the clothing surface of the fabric and is 100% covered. Therefore, the fabric body θ2 < θ1, W1: W2 = 0.5.

[0047] According to the test method of the fabric performance of the present invention, the sweat residual rate test is carried out: 1) Prepare two samples of fabric according to 12×10 cm, one of which has a long side parallel to the low areas a2, recorded as S1; The other has a long side perpendicular to the low areas a2, recorded as S2; after balancing, the samples are weighed to obtain initial weights WS1=3.58g and WS2=3.58g; 2) 1 cm along the top and bottom of the short side is the hanging area, and the sample is hung with the skin-contacting side facing upward. The clamps clamp the two clamping areas at the top and bottom of the sample respectively and clamp the sample at a horizontal angle of 75 degrees and a pre-tension of 0.5N; 3) At a position of 2 cm from the upper short side and 5 cm from the long side of the sample, use a syringe to inject 3ML of water at a height of 1 cm from the sample surface within 5 seconds; 4) After the injection, WS1b was weighed immediately to obtain 4.96g and WS2b = 5.79g; 5) Calculate the parallel sweat residual rate (WS1b-WS1) / WS1*100%=(4.96-3.58) / 3.58*100%=38%

[0048] The knitted fabric thus formed can help to draw sweat accumulated on the skin surface away from the skin during high-intensity exercise. Part of the sweat can diffuse and evaporate from the skin-contacting surface of the fabric and the clothing surface, and part of the sweat naturally flows along the channel formed in the low area under the action of gravity and is guided out of the clothing, so that the clothing can reduce the adhesion of the fabric to the skin under high sweating conditions, and can still reduce the weight of the fabric increased due to sweating while maintaining high heat dissipation. The fabric was measured according to the standard AATCC 195 "Liquid Moisture Management Properties of Textile Fabrics". The one-way moisture conduction capacity OWTC (one way transport capability) of the fabric body measured this time is 304%.Comparative Example 2

[0049] The first yarn Y1 is made of ordinary polyamide fiber (PA6 30D / 12F SD DTY), and the second yarn Y2 is made of ordinary polyamide fiber (PA6 40D / 68F SD DTY). Wherein, DPFY1 =2.5, the contact angle θ1 of the Y1 yarn is 60°, and the moisture regain MR1 of the Y1 yarn is 4.5%; DPFY2=0.56, the contact angle θ2 of the Y2 yarn is 50°, and the moisture regain MR2 of the Y2 yarn is 4.5%, and LPY1:LPY2>2.0. The two yarns Y1 and Y2 are interwoven to form a weft-knitted double-sided jacquard fabric. The first yarn Y1 is used to form a strip-shaped 3D structure on the skin-contacting surface of the fabric body. The high area formed by the raised 3D strip-shaped part has a width Wa, and Wa = 0.2 cm at this time; the space between two adjacent high areas on the skin-contacting surface formed by the second yarn Y2 forms a low area forms with a width of Wb,and Wb = 0.4 cm at this time.

[0050] At the same time, the second yarn Y2 is used to form the clothing surface of the fabric and is 100% covered. Therefore, the fabric body θ2<θ1, W1:W2= 0.5.

[0051] According to the test method of the fabric performance of the present application, the sweat residual rate test is carried out: 1) Prepare two samples of fabric according to 12×10 cm, one of which has a long side parallel to the low areas a2, denoted as S1; The other has a long side perpendicular to the low areas a2, denoted as S2; after balancing, the samples are weighed to obtain the initial weights WS1=3.58g and WS2=3.58g; 2) The top and bottom 1cm along the short side is the hanging area, and the sample is hung with the skin-contacting side facing upwards. The clamps clamp the top and bottom two clamping areas of the sample respectively and clamp the sample at a horizontal angle of 75 degrees and a pre-tension of 0.5N; 3) At a position of 2cm from the upper short side and 5cm from the long side of the sample, use a syringe to inject 3ML of water at a height of 1cm from the sample surface within 5 seconds; 4) After the injection, WS1bb = 7.06g and WS2bb = 7.49g were weighed immediately; 5) Calculate the parallel sweat residual rate (WS1bb-WS1) / WS1*100% = (7.06-3.58) / 3.58*100% = 97.2%

[0052] By comparing the two, it can be seen that the fabric designed by the present invention helps to draw sweat accumulated on the skin surface away from the skin, part of the sweat can be diffused and evaporated from the skin-contacting surface of the fabric and the clothing surface, and part of the sweat naturally flows along the channel formed in the low area under the action of gravity and is discharged from the clothing, so that the clothing can reduce the adhesion of the fabric to the skin under high sweating conditions, and can still reduce the weight of the fabric increased due to sweating while maintaining high heat dissipation.Example 3

[0053] The first yarn Y1 is made of ordinary polyester fiber (PES 75D / 144F SD DTY), and the second yarn Y2 is made of polyester fiber with water repellent function (PES 50D / 36F SD DTY). Among them, DPFY1=0.52, the contact angle θ1 of the Y1 yarn is 55°, and the moisture regain MR1 of the Y1 yarn is 0.45%; DPFY2=1.38, the contact angle θ2 of the Y2 yarn is 85°, and the moisture regain MR2 of the Y2 yarn is 0.45%, and LPY1:LPY2>2.0. The two yarns Y1 and Y2 are interwoven to form a weft-knitted double-sided jacquard fabric. The first yarn Y1 forms a strip-shaped 3D structure on the clothing surface of the fabric body. The high area formed by the raised 3D strip-shaped part has a width WF1, and WF1 = 0.25 cm at this time. The space between the two adjacent high areas of the clothing surface made of the second yarn Y2 forms a low area, and its width is WF2, and WF2 = 0.45 cm at this time. At the same time, the second yarn Y2 makes the skin-contacting layer of the fabric for 100% coverage. Therefore, the fabric body θ2 < θ1, W1: W2 = 0.55.

[0054] The knitted fabric formed in this way can help to draw sweat accumulated on the skin surface away from the skin, and part of the sweat can diffuse and evaporate from the skin-contacting surface of the fabric and the clothing surface, while the micro-texture of the clothing surface also enriches the appearance of the fabric, and the knitted fabric is measured according to the standard AATCC 195 "Liquid Moisture Management Properties of Textile Fabrics". The one-way moisture transport capability OWTC (one way transport capability) of the fabric body measured this time is 368%.

Examples

example 1

Example 1

[0040]The first yarn Y1 is made of polyester fiber (PES 40D / 24F SD DTY) with water repellent function, and the second yarn Y2 is made of ordinary polyester fiber (PES 50D / 72F SD DTY). Among them, DPFY1=1.6, the contact angle θ1 of the Y1 yarn is 135°, and the moisture regain MR1 of the Y1 yarn is 0.45%; DPFY2=0.69, the contact angle θ2 of the Y2 yarn is 55°, and the moisture regain MR2 of the Y2 yarn is 0.45%, and LPY1:LPY2>2.0 applies. The two yarns Y1 and Y2 are interwoven to form a weft-knitted single-sided jacquard fabric. The skin-contacting surface of the fabric made of the first yarn Y1 forms a strip-shaped 3D structure, and the high area formed by the raised 3D strip-shaped part has a width W1, and at this time W1=0.3cm. The space between two adjacent high areas made of the second yarn Y2 forms a low area, whose width is W2, and W2 = 0.5 cm. Therefore, the fabric body θ2 < θ1, W1: W2 = 0.6.

[0041]According to the test method of the fabric performance of the present i...

example 2

Example 2

[0046]The first yarn Y1 is made of polyamide fiber (PA6 30D / 12F SD DTY) with water repellent function, and the second yarn Y2 is made of ordinary polyamide fiber (PA6 40D / 68F SD DTY). Among them, DPFY1=2.5, the contact angle θ1 of Y1 yarn=125°, and the moisture regain MR1 of Y1 yarn is 1.9%; DPFY2=0.56, the contact angle θ2 of Y2 yarn=50°, and the moisture regain MR2 of Y2 yarn is 4.5%, and LPY1:LPY2>2.0. For the calculation method of the water conduction capacity of the yarn, please refer to the first application of the inventor (design method of differential water conduction fabric based on the capillary water conduction capacity of the fabric, CN201811089055.9). The two yarns Y1 and Y2 are interwoven to form a weft-knitted double-sided jacquard fabric. The first yarn Y1 is used to form a strip-shaped 3D structure on the skin-contacting surface of the fabric body. The high area formed by the raised 3D strip-shaped part has a width Wa, and Wa = 0.2 cm at this time. The spa...

example 3

Example 3

[0053]The first yarn Y1 is made of ordinary polyester fiber (PES 75D / 144F SD DTY), and the second yarn Y2 is made of polyester fiber with water repellent function (PES 50D / 36F SD DTY). Among them, DPFY1=0.52, the contact angle θ1 of the Y1 yarn is 55°, and the moisture regain MR1 of the Y1 yarn is 0.45%; DPFY2=1.38, the contact angle θ2 of the Y2 yarn is 85°, and the moisture regain MR2 of the Y2 yarn is 0.45%, and LPY1:LPY2>2.0. The two yarns Y1 and Y2 are interwoven to form a weft-knitted double-sided jacquard fabric. The first yarn Y1 forms a strip-shaped 3D structure on the clothing surface of the fabric body. The high area formed by the raised 3D strip-shaped part has a width WF1, and WF1 = 0.25 cm at this time. The space between the two adjacent high areas of the clothing surface made of the second yarn Y2 forms a low area, and its width is WF2, and WF2 = 0.45 cm at this time. At the same time, the second yarn Y2 makes the skin-contacting layer of the fabric for 100% ...

[0001] The present invention discloses a knitted fabric capable of directionally controlling sweat transfer within the fabric from top to bottom and from inside to outside according to a designed direction, and evaporating it on the outer fabric surface, thereby achieving rapid heat dissipation by fully utilizing the outer fabric surface for sweat diffusion and evaporation. The fabric is composed of at least two yarns, Y1 and Y2. For yarn Y1, the contact angle θ1 ≥ 65°, DPFY1 ≤ 2.0; for yarn Y2, the contact angle θ2 ≤ 90°, DPFY2 ≤ 1.5; and the moisture regain of yarn Y1≤ 5%. One fabric side presents a strip-shaped 3D structure, where protruding parts form high areas labeled a1, and a space between two adjacent high areas forms a low area labeled a2, . The areas a1 have a width W1, where 0.1 ≤ W1 ≤ 10 cm, using yarn Y1; the areas a2 have a width W2, where 0.2 ≤ W2 ≤ 5 cm, using yarn Y2, and θ2 < θ1 on the same fabric. This knitted fabric helps draw sweat accumulated on the skin surface away from the skin during high-intensity exercise. Part of the sweat can be transferred from the fabric's skin-contact surface to the outer fabric surface for diffusion and evaporation, while the remaining sweat naturally flows out of the garment along channels formed by the areas a2 under the action of gravity. This reduces the adhesion of the garment fabric to the skin under high sweating conditions and minimizes the weight increase due to sweat absorption while maintaining high heat dissipation.Technical Field

[0002] This invention relates to a design method for a knitted fabric capable of directional sweat guidance and rapid evaporation. The knitted fabric designed by this method has a micro - texture effect when people are highly physically active and sweating heavily, enabling directional control of sweat transfer to keep the skin dry, provide excellent evaporation and heat dissipation, and reduce fiber material weight gain due to moisture absorption.Background

[0003] Dan Cao&Yongjin Wang pointed out in the article "Questionnaire Survey Based on the Design of Men's Functional Running Pants" (Journal of Wuhan Textile University, VOL29, NO.1,Feb.2016. P.10): less than 50% of the respondents are satisfied with the functions of the currently purchased running pants. The parts most likely to sweat when wearing running pants are the lower back, inner thighs, buttocks, abdomen, knee socket, back thigh, front thigh, back calf, and front calf; the parts most likely to get hot when wearing running pants are the lower back, inner thigh, buttocks, back thigh, abdomen, knee socket, front thigh, back calf, and front calf. Its research also pointed out that consumers are most concerned about the moisture-wicking and tactile comfort of running pants, followed by pressure comfort, while the selection rate for factors such as warmth and wind resistance is relatively low. As we all know, the human body produces a large amount of sweat during exercise. At this time, the skin will feel sticky when it comes into contact with clothing, and the sweat will evaporate slowly, which will cause a stuffy feeling. At the same time, under the premise of long-term and high-intensity exercise, people sweat a lot.

[0004] According to reports (https: / / baijiahao.baidu.com / s?id=1659037479910670348&wfr=spider&for=pc) : According to relevant research, a full marathon is 42.195 kilometers. Under such exercise, the amount of sweat per hour for ordinary runners can reach 1000ml. According to the GB / T 21655.1-2008 standard, one of the current indicators of moisture-absorbing and quick-drying fabrics requires the evaporation rate to be greater than 0.18ml / hr. Based on the sample fabric size of 10×10cm and the evaporation rate of 0.18ml / hr, if you want to evaporate 1000ml of sweat per hour, you will need about 55.6 square meters of fabric area. Even if the evaporation rate of the fabric reaches 0.60ml / hr, you will still need nearly 17 square meters of fabric area. It can be seen that during high-intensity exercise, a large amount of sweat cannot evaporate in time, or be absorbed into the fabric, or fall to the ground.

[0005] Much literature has been discussed regarding the reuse of sweat. From the perspective of sports science, how to use sweat to maximize the heat dissipation advantages caused by its evaporation, while also avoiding the weight gain and moisture absorption and heating caused by the fabric absorbing a large amount of water, is a current research entry point. Therefore, for the design and development of sports fabrics, an important direction is to pursue how to reasonably eliminate a large amount of sweat generated during exercise in a timely manner and maintain a refreshing feeling.

[0006] At present, the moisture absorption and quick-drying function is a research direction, and it is often disclosed in patent documents: CN115029795A, ramie fiber moisture-absorbing and quick-drying fabric and its preparation specifically discloses a ramie fiber moisture-absorbing and quick-drying fabric and its preparation method. The preparation method of ramie fiber moisture-absorbing and quick-drying fabrics includes the following steps: Step 1), prepare a degumming bacterial solution; Step 2), mix ramie and water, keep the temperature constant at 30-32°C, inoculate the degumming bacterial solution in the water, the inoculation quality of the degumming bacterial solution is 1-2% of the quality of the clean water, then inject oxygen into the water, and perform degumming treatment for 60-62 hours to obtain pretreated fiber; Step 3), put the pretreated fiber into clean water, then add ozone to the clean water, perform bleaching treatment, filter and dry to obtain ramie fiber; Step 4), spin the ramie fiber and weave it to obtain ramie fiber moisture-absorbing and quick-drying fabric; the degumming bacterial solution is composed of culture solution, Bacillus subtilis, Clostridium fexinia, and Flavobacterium pectophaga, and the OD value of the degumming bacterial solution is 10-12. The invention has the advantage of reducing the discomfort caused by the fabric sticking to the body.

[0007] CN115029838A discloses a production process of a moisture-absorbing and quick-drying antibacterial knitted stretch denim fabric. By blending jute fiber, moisture-absorbing and quick-drying fiber, spandex elastic yarn, and cotton blended colored yarn in proportion, it is processed into a fabric that solves the problem of traditional denim fabrics with many advantages such as firmness, good wear resistance, and long service life. However, the denim clothing produced has shortcomings such as poor air permeability, poor hygroscopicity, no antibacterial properties, and poor quick-drying performance. Fabrics processed by blending jute fiber, moisture-absorbing and quick-drying fiber, spandex elastic yarn, and cotton blended colored yarn have good antibacterial properties, breathability, anti-mite properties, and quick-drying properties.

[0008] There are several ways to achieve differentiated moisture-wicking fabrics, such as: 1. Use post-finishing methods such as printing and lamination to achieve differentiated moisture conduction; Patent CN103009763 B, "A single-parent, single-proof, moisture-absorbing and quick-drying fabric and its production method", provides a treatment method: hydrophilic treatment of the entire fabric, printing of discontinuous water-repellent areas on the back of the fabric, and water-repellent coating treatment on the front of the fabric. This method can make the fabric have good moisture absorption and quick-drying performance, and the outer surface will not absorb sweat and produce obvious sweat marks. Patent CN104786576 B, "A one-way moisture-conducting fabric structure", discloses a one-way moisture-conducting weft-knitted fabric structure with a porous silica gel pattern on the outer surface that can absorb a large amount of water and a cotton and linen blended fabric on the inner surface that is easy to keep dry. 2. Use functional yarns or utilize the water conduction capacity of different yarns to achieve differentiated moisture conduction; Patent CN 1985036A, "Woven fabric with moisture management properties", reports a woven fabric composed of a generally uniform woven structure of hydrophobic and hydrophilic materials, and having internal and external exposed surfaces of hydrophobic and hydrophilic materials. Thus, a one-way transfer of sweat from the bottom of the fabric to the surface of the fabric is achieved. Patent application CN201710717764.6, "A moisture-conducting quick-drying knitted weft-knitted fabric and its processing technology", provides a moisture-conducting quick-drying knitted weft-knitted fabric made of at least two yarns with different DPFs, and the different moisture-conducting capabilities of the two sides of the fabric are achieved by designing the floating lengths of the two different DPF yarns on the two sides of the fabric. 3. Double-sided equipment is used to make the front and back sides of the fabric have different water-conducting properties; Patent application CN106012538 A, "Method for producing a moisture-absorbing, quick-drying, one-way moisture-conducting double-layer fabric", reports a method of weaving a double-layer fabric grey cloth with cationic polyester yarn and polyester filament, and then treating the double-layer fabric grey cloth with a modified refining agent LS01 to produce a moisture-absorbing, quick-drying, one-way moisture-conducting fabric.

[0009] At present, the effect of using yarn with moisture-conducting and quick-drying properties or using post-finishing methods to achieve this effect will gradually weaken or even disappear with the increase in the number of washes, and it is not conducive to environmental protection. Double-layer / triple-layer fabrics have obvious differentiation effects, but they are thicker and heavier than single-layer fabrics, which has greater limitations in terms of breathability and wearing comfort. In addition, the impact of moisture absorption and weight gain of high-performance sportswear on athletic performance, especially on endurance sports performance, is still in its infancy.

[0010] In summary, although the differentiated moisture conduction function of fabrics has been widely studied, there are few reports on the use of knitted fabrics to not only effectively remove sweat from the skin surface, but also maximize its evaporation to achieve effective heat dissipation and minimize the increase in load caused by weight gain.

[0011] Through the search and research of prior art, it is found that the following two issues have not been deeply studied in the industry: (1) How to reduce the heat and weight gain caused by moisture absorption when the fabric reaches saturation, which in turn affects the performance, especially in endurance sports. (2) How to effectively improve the efficiency of evaporative heat dissipation and use the evaporation of sweat to effectively remove heat. Summary of the Invention

[0012] Through research, the inventors found that the material's ability to absorb moisture and release heat is related to the moisture regain of the fiber. Previous studies have confirmed that the hydrophilic groups in the fiber molecules combine with water molecules, reducing the kinetic energy of the water molecules and converting them into heat energy for release. Usually, the hygroscopic and heat-generating performance is closely related to the moisture regain of the fiber. The larger the moisture regain of the fiber, the better the hygroscopic and heat-generating performance, while the smaller the moisture regain, the worse the hygroscopic and heat-generating performance. For example, wool and modal fibers have good hygroscopic and heat-generating effects. Ordinary acrylic and polyester fibers have poor moisture absorption and heat generation effects. Therefore, the use of fiber materials with low moisture regain will have three advantages: (1) reduce the moisture absorption and heat generation effect; (2) reduce the weight increase of fiber materials due to moisture absorption; (3) because the moisture is on the outer surface of the fiber, it is more conducive to accelerating evaporation by using the convection of moving air.

[0013] According to GB21655.1-2008, the moisture content of fabrics can be measured and the moisture content of quick-drying fabrics according to this standard is required to be at least 200%. This also means that the weight of fabrics that meet the standard after being fully wetted is at least 200% of the nominal weight. This is also a major challenge for extreme athletes. Analysis of the reasons for the weight gain of fabrics after wetting, in addition to the moisture that enters the fiber due to the regain, another part is the moisture that exists between fibers and enters the fabric structure due to the capillary effect. By controlling the number of capillaries in the yarn, and the equivalent characteristics of the capillaries such as surface energy (contact angle), the equivalent radius can control the water transfer distance and amount, thereby affecting the moisture content of the fabric and reducing the weight by reducing the moisture content of the fabric.

[0014] The present invention will be further described based on the accompanying drawings and examples.Brief Description of Drawings

[0015] FIG1 is a schematic diagram of the structural features of the fabric of the present invention; FIG2 is a schematic diagram showing the principle of the fabric of the present invention to achieve its technical effect; FIG. 3 is a photograph of a fabric of the present invention.

[0016] As shown in Figures 1 and 2, the important features of the fabric of the present invention include: (1) The overall moisture regain of the fabric is very low, less than 5%, preferably less than 1.5%, which can reduce the moisture absorption and heating effect of the fabric and reduce moisture absorption and weight gain; (2) The material used on the skin-contacting surface has a large contact angle, which is convenient for sweat to roll on its surface and reduce the chance of sticking; (3) The material used on the clothing surface (i.e. the other side relative to the skin-contacting surface) has a small contact angle, which is convenient for sweat to be absorbed by it and diffused over a larger range on the clothing surface to improve evaporation efficiency; (4) The material used for the skin-contacting surface has a large contact angle and is a discontinuous and uniform hydrophobic surface, thereby forming open grooves, the bottom of which is constructed of a hydrophilic clothing surface material, and the two walls are constructed of a hydrophobic skin-contacting surface material. In addition, when worn, the grooves are not parallel to the horizontal plane, so that the gravity of sweat droplets can be used to make sweat flow out of the fabric, thereby reducing the probability of sweat being absorbed and stuck to the hydrophilic groove bottom.

[0017] When sweat accumulates on the skin surface, the size of a sweat droplet varies. In life, the size of a sweat droplet is described as millet-shaped, sesame-shaped or soybean-shaped (https: / / zhidao.baidu.com / question / 1435837061132728219.html); combined with the structural design of the fabric, there are three possible contact situations between a sweat droplet and the fabric: (1) When the sweat droplet is in the groove, the sweat is attracted by the hydrophilic clothing surface a2 and diffuses and evaporates on the clothing surface, and the sweat that is not attracted flows downward along the groove until it flows out of the clothing; (2) If the sweat drop is partially in the groove and partially on the hydrophobic skin-contacting surface a1, the sweat on the hydrophobic skin-contacting surface a1 is attracted by the hydrophilic clothing surface a2, and the sweat on the hydrophobic skin-contacting surface a1 is more likely to flow into the hydrophilic clothing surface a2; the sweat still remaining on the hydrophobic skin-contacting surface a1 may slide down along the hydrophobic skin-contacting surface a1; (3) If the sweat drop is completely on the hydrophobic skin-contacting surface a1, the sweat slides down under the action of gravity.

[0018] This also provides certain data support for the width of the groove and the size of the discontinuous hydrophobic area in the fabric design of this study. At the same time, it combines wearing comfort and sports experience. This study is finally summarized as follows: A method that can control the direction of sweat in the fabric to transfer the sweat from top to bottom and from inside to outside in the designed direction and evaporate it effectively on the clothing surface, so as to avoid the weight gain of the fabric caused by absorbing a large amount of sweat during high-intensity exercise, and can fully utilize the clothing surface of the fabric for the diffusion and evaporation of sweat to achieve the effect of rapid heat dissipation. Compared with fabrics made entirely of materials with a moisture regain of 0%, sweat cannot be absorbed and evaporated to a certain extent.

[0019] Although it can well achieve the difficulty of sweat wetting the fabric and not gaining weight during high-intensity exercise, it cannot take advantage of the heat dissipation benefits brought by the evaporation of sweat. It is well known in the industry that the latent heat of evaporation of water at 25°C is 44KJ / mol.

[0020] Therefore, after fully analyzing the relationship between exercise load and function, the fabric features designed by the present invention are: At least two yarns (Y1 and Y2), the contact angle θ1 of the Y1 yarn is ≥65° , DPFY1≤2.0, and the contact angle θ2 of the Y2 yarn≤90° , DPFY2≤1.5.

[0021] The DPF data in the yarn is used to control the number of capillaries in the yarn and the size of the equivalent diameter of the capillaries to achieve the control of the water transport capacity and water transport amount of the yarn.

[0022] Moisture regain is an important parameter in this study, which is used to control the weight gain of the fabric. The moisture regain of the Y1 yarn (MR1) ≤5%.

[0023] As shown in FIG1 , the structural feature is that one fabric surface of the fabric is a strip-shaped 3D structure, the raised parts form high areas labeled a 1 , a 1 hasa width W1, and combined with the analysis of the size of a single sweat and the possibility of continuous sweat, 0.1≤W1≤10 cm is set, and the space between two adjacent high areas forms a low area labeled a2,a2 has a width W2, where 0.2≤W2≤5 cm; the a1 area uses Y1 yarn, and the a2 area uses Y2 yarn, and on the same piece of fabric, θ2<θ1; the knitted fabric formed thereby can help to draw sweat accumulated on the skin surface away from the skin during high-intensity exercise, part of the sweat can diffuse and evaporate from the skin-contacting surface of the fabric and on the clothing surface, and part of the sweat naturally flows out of the clothing along the channel formed in the a2 area under the action of gravity, so that the clothing can reduce the adhesion of the fabric to the skin under high sweating conditions, and can still reduce the weight of the fabric increased due to sweating while maintaining high heat dissipation.

[0024] Y1 and Y2 are chemical fibers, preferably with a yarn moisture regain of ≤ 1.5% and a yarn liquid water conductivity LPY2: LPY1 ≥2.0; further, one of Y1 or Y2 is a natural fiber or a natural fiber blended yarn, with a yarn moisture regain of ≤15%, a yarn liquid water conductivity LPY2:LPY1 ≥2.0 and a total content of the fiber in the fabric of less than 30%, thereby further improving the wearing experience of the fabric.

[0025] The knitted fabric may be a weft-knitted single-sided fabric, and the width ratio of the high and low areas is 0.10≤W1:W2≤2.5, preferably 0.5≤W1:W2≤ 0.75.

[0026] The knitted fabric may be a weft-knitted double-sided fabric, and W2 preferably covers 100% of the fabric clothing surface.

[0027] The weft-knitted double-sided fabric has a jacquard rib structure, and the jacquard is double-sided.

[0028] Through holes are designed in areas a2, and the total area occupied by all through holes is ≤50% of the total area of a2. Such a design further improves the moisture permeability and vapor permeability of the fabric during use, and is more conducive to the evaporation of sweat from the microenvironment of human clothing into the outside world.

[0029] In order to make full use of the gravity of sweat droplets in clothing design to discharge sweat from top to bottom, the fabric requires that the angle (θ3) between areas a2 and the horizontal plane is 30° ≤θ3≤150° , and preferably θ3 is 90° .

[0030] Taking into account the requirement for beautifying the appearance of the fabric, the 3D surface of the fabric can be designed as a clothing surface during use. Under this condition, the contact angle θ1 of the Y1 yarn≤65° , DPFY1≤1.5, the contact angle θ2 of the Y2 yarn≥65° , DPFY2≤2.0, and the moisture regain (MR2) of the Y2 yarn≤5%; the structural feature is that the clothing surface of the fabric is a strip-shaped 3D structure to increase the evaporation area and appearance micro-texture of the fabric.

[0031] In the field of textiles and in the context of the present invention, "yarn" refers to a continuous linear object made of various textile fibers as raw materials. Yarn is mainly used for weaving woven fabrics, knitted fabrics, braided fabrics and some non-woven fabrics. "yarn" is a slender object with a certain strength and linear density formed by arranging many short fibers or filaments in an approximately parallel state and twisting them along the axial direction; while "thread" is a strand formed by twisting two or more single yarns. "DPF of yarn" is a unit for measuring the fineness of a single fiber of yarn. It is the D / F value, where D is the weight of the yarn per unit length, and F is the number of fibers per unit length of yarn.

[0032] "Hygroscopic and heat-generating effect of fabrics", generally speaking, the heat-generating performance of hygroscopic and heat-generating fibers is related to their moisture regain. If the moisture regain is high, the hygroscopic and heat-generating performance is excellent; otherwise, it is poor. Inspired by this, people have developed hygroscopic and heat-generating fibers. The mechanism of fiber heat generation due to moisture absorption is generally believed to be that when the fiber absorbs water, the fiber molecules and water molecules attract each other and combine, and the kinetic energy of the water molecules is reduced and converted into heat (energy) and released. In addition, in order to enhance the heat generation effect, a certain substance can be added inside the fiber or coated on the fiber surface. When the fiber absorbs water, the substance is triggered to undergo a chemical reaction and release more heat. Its performance can be measured according to the standard: GB / T 29866-2013 Test method for moisture absorption and heat generation of textiles.

[0033] "Contact angle" is the contact angle of a liquid on the surface of a solid material, and is an important parameter for measuring the wettability of the liquid to the surface of the material. By measuring the contact angle, a lot of information about the interaction between the solid-liquid and solid-gas interfaces on the surface of the material can be obtained. The contact angle measurement technology can not only be used for the surface properties of common characterization materials, but also has important applications in the fields of petroleum industry, flotation industry, pharmaceutical materials, chip industry, low surface energy non-toxic antifouling materials, inks, cosmetics, pesticides, printing and dyeing, papermaking, fabric finishing, detergents, spraying, sewage treatment, etc. If θ<90°, the solid surface is hydrophilic, that is, the liquid is easier to wet the solid, and the smaller the angle, the better the wettability; if θ>90°, the solid surface is hydrophobic, that is, the liquid is not easy to wet the solid, and it is easy to move on the surface. As for whether the liquid can enter the capillary, this is also related to the specific liquid, and not all liquids do not enter the capillary at a larger angle. The wetting process is related to the interfacial tension of the system.

[0034] In the context of the textile industry and the present invention, "contact angle" can be used to indicate the hydrophobicity and hydrophilicity of a yarn. If θ < 90°, the surface of the yarn is hydrophilic, i.e., liquid wets the yarn more easily, and the smaller the angle, the better the wettability; if θ > 90°, the surface of the yarn is hydrophobic, i.e., liquid does not wet the yarn easily and moves easily on its surface.

[0035] "Micro-texture effect" refers to a description of the texture of a fabric. The characteristic of textured fabrics is that the fabric is made into uneven but regular undulations by thread or other means. The morphological beauty of clothing fabrics is mainly reflected in the texture of the material. The texture is a different psychological feeling given by touch, such as: rough and smooth, soft and hard, light and heavy, etc. The visual effect of the texture can not only enrich the morphological expression of the fabric, but also has dynamic and creative expressionist aesthetic characteristics.

[0036] "Moisture regain" refers to the moisture regain of yarn, that is, the public moisture regain of yarn, which indicates the moisture content of each component raw material of the yarn under standard conditions. Its value is equal to the standard moisture regain of each raw material multiplied by its percentage content.

[0037] "Capillaries of yarn" refers to the capillaries formed by the gaps between fibers in the yarn. The shape and number of these capillaries determine the water conduction capacity of the yarn.

[0038] The performance testing method of the fabric is as follows: (1) Sweat residual rate a) Prepare two samples of fabric according to 12×10 cm, one of which has a long side parallel to the low areas a2, denoted as S1; the other has a long side perpendicular to the low areas a2, denoted as S2; weigh the samples after balancing to obtain the initial weights WS1 and WS2; b) 1 cm from the top and bottom of the short side is the hanging area. The sample is hung with the skin-contacting side facing upwards. The clamps clamp the top and bottom clamping areas of the sample respectively and clamp the sample at a horizontal angle of 75 degrees with a pre-tension of 0.5N; c) 3 ml of water is injected into the sample surface 1 cm high with a syringe within 5 seconds at a position 2 cm from the upper short side and 5 cm from the long side; d) WS1a and WS2a are weighed immediately after the injection; e) The parallel sweat residual rate (WS1a-WS1) / WS1*100% is calculated, and the vertical sweat residual rate (WS2a-WS2) / WS2*100% is calculated. (2) Other functional characteristics, such as unidirectional moisture conduction performance according to GB21655.2-2019, and evaporation rate according to GB21655.1-2008. Description of Embodiments

[0039] The technical scheme in the embodiment of the present application will be clearly and completely described below in conjunction with the fabric structure principle diagram of FIG. 1 and the working principle diagram of the invention of FIG. 2. Obviously, the described embodiment is only a part of the embodiment of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present application.Example 1

[0040] The first yarn Y1 is made of polyester fiber (PES 40D / 24F SD DTY) with water repellent function, and the second yarn Y2 is made of ordinary polyester fiber (PES 50D / 72F SD DTY). Among them, DPFY1=1.6, the contact angle θ1 of the Y1 yarn is 135°, and the moisture regain MR1 of the Y1 yarn is 0.45%; DPFY2=0.69, the contact angle θ2 of the Y2 yarn is 55°, and the moisture regain MR2 of the Y2 yarn is 0.45%, and LPY1:LPY2>2.0 applies. The two yarns Y1 and Y2 are interwoven to form a weft-knitted single-sided jacquard fabric. The skin-contacting surface of the fabric made of the first yarn Y1 forms a strip-shaped 3D structure, and the high area formed by the raised 3D strip-shaped part has a width W1, and at this time W1=0.3cm. The space between two adjacent high areas made of the second yarn Y2 forms a low area, whose width is W2, and W2 = 0.5 cm. Therefore, the fabric body θ2 < θ1, W1: W2 = 0.6.

[0041] According to the test method of the fabric performance of the present invention, the sweat residual rate test is carried out: 1) Two samples of fabric are prepared according to 12×10 cm, one of which has a long side parallel to the low areas a2, denoted as S1; The other has a long side perpendicular to the low areas a2, denoted as S2; after balancing, the samples are weighed to obtain initial weights WS1=2.55g and WS2=2.55g; 2) 1 cm from the top and bottom of the short side is the hanging area. The sample is hung with the skin-contacting side facing upwards. The clamps clamp the top and bottom clamping areas of the sample respectively and clamp the sample at a horizontal angle of 75 degrees with a pre-tension of 0.5N; 3) At a position of 2 cm from the upper short side and 5 cm from the long side of the sample, 3 ml of water is injected at a height of 1 cm from the sample surface within 5 seconds using a syringe; 4) After the injection is completed, WS1a is weighed immediately to obtain 3.36 g and WS2a is weighed to obtain 4.27 g; 5) Calculate the parallel sweat residual rate (WS1a-WS1) / WS1*100%=(3.36-2.55) / 2.55*100%=32%.

[0042] From the above measurement data, it can be obtained that the hanging method of sample S1 is more convenient for sweat to slide down because the groove method is at an angle of 75 degrees to the horizontal plane and the two walls of the groove are composed of hydrophobic yarn. In the set flow process, about 0.81 g of water is absorbed by the fabric. 2.19g of water flows out of the sample; in contrast, for the same fabric, when the direction of the groove is parallel to the horizontal plane, since the sweat needs to continuously overcome the obstacles of multiple grooves to flow out of the sample, the chance of sweat diffusing in the groove in the horizontal direction is increased, but the chance of flowing out of the sample is reduced. From the test results, it can be obtained that about 1.72g of water is absorbed by the fabric; 1.28g of water flows out of the sample.

[0043] The knitted fabric thus formed can reasonably use the groove direction to help draw the sweat accumulated on the skin surface away from the skin during high-intensity exercise. Part of the sweat can diffuse and evaporate from the skin-contacting surface of the fabric and the clothing surface, and part of the sweat naturally flows along the channel formed in the low area under the action of gravity and is guided out of the clothing, so that the clothing can reduce the adhesion of the fabric to the skin under high sweating conditions, and can still reduce the weight of the fabric increased due to sweating while maintaining high heat dissipation. The fabric was measured according to the standard AATCC 195 "Liquid Moisture Management Properties of Textile Fabrics". The one-way moisture conduction capacity OWTC (one way transport capability) of the fabric body measured this time is 648%.Comparative Example 1

[0044] The first yarn Y1 is made of ordinary polyester fiber (PES 40 / 24F SD DTY), and the second yarn Y2 is made of ordinary polyester fiber (PES 50D / 72F SD DTY). Wherein, DPFY1=1.6, the contact angle θ1 of the Y1 yarn is 75°, and the moisture regain MR1 of the Y1 yarn is 0.45%; DPFY2=0.69, the contact angle θ2 of the Y2 yarn is 55°, and the moisture regain MR2 of the Y2 yarn is 0.45%, and LPY1:LPY2>2.0. For the calculation method of the water conduction capacity of the yarn, please refer to the first application of the inventor (a method for designing differential water conduction fabrics based on the capillary water conduction capacity of the fabric, CN201811089055.9). The two yarns Y1 and Y2 are interwoven to form a weft-knitted single-sided jacquard fabric. The skin-contacting surface of the fabric made of the first yarn Y1 forms a strip-shaped 3D structure. The high area formed by the raised 3D strip-shaped part has a width W1, and W1 = 0.3 cm. The space between two adjacent high areas made of the second yarn Y2 forms a low area, and its width is W2, and W2 = 0.5 cm. Therefore, the fabric body θ2 < θ1, W1: W2 = 0.6. 1) Prepare two samples of fabric with a size of 12×10 cm, one of which has its long side parallel to the low areas a2, denoted as S1; The other has its long side perpendicular to the low areas a2, denoted as S2; weigh the samples after balancing to obtain initial weights WS1=2.55g and WS2=2.55g; 2) 1 cm from the top and bottom of the short side is the hanging area. The sample is hung with the skin-contacting side facing upwards. The clamps clamp the top and bottom clamping areas of the sample respectively and clamp the sample at a horizontal angle of 75 degrees with a pre-tension of 0.5N; 3) At a position of 2 cm from the upper short side and 5 cm from the long side of the sample, 3 ml of water is injected into the sample surface 1 cm high within 5 seconds using a syringe; 4) After the injection is completed, WS1aa=5.06g and WS2aa=5.32g are weighed immediately; 5) Calculate the parallel sweat residual rate (WS1aa-WS1) / WS1*100%=(5.06-2.55) / 2.55*100%=98% The vertical sweat residual rate was calculated as (WS2aa-WS2) / WS2*100%=(5.32-2.55) / 2.55*100%=108%.

[0045] By comparing the two, it can be seen that the fabric designed by the present invention helps to draw sweat accumulated on the skin surface away from the skin, part of the sweat can be diffused and evaporated from the skin-contacting surface of the fabric and the clothing surface, and part of the sweat naturally flows along the channel formed in the low area under the action of gravity and is discharged from the clothing, so that the clothing can reduce the adhesion of the fabric to the skin under high sweating conditions, and can still reduce the weight of the fabric increased due to sweating while maintaining high heat dissipation.Example 2

[0046] The first yarn Y1 is made of polyamide fiber (PA6 30D / 12F SD DTY) with water repellent function, and the second yarn Y2 is made of ordinary polyamide fiber (PA6 40D / 68F SD DTY). Among them, DPFY1=2.5, the contact angle θ1 of Y1 yarn=125°, and the moisture regain MR1 of Y1 yarn is 1.9%; DPFY2=0.56, the contact angle θ2 of Y2 yarn=50°, and the moisture regain MR2 of Y2 yarn is 4.5%, and LPY1:LPY2>2.0. For the calculation method of the water conduction capacity of the yarn, please refer to the first application of the inventor (design method of differential water conduction fabric based on the capillary water conduction capacity of the fabric, CN201811089055.9). The two yarns Y1 and Y2 are interwoven to form a weft-knitted double-sided jacquard fabric. The first yarn Y1 is used to form a strip-shaped 3D structure on the skin-contacting surface of the fabric body. The high area formed by the raised 3D strip-shaped part has a width Wa, and Wa = 0.2 cm at this time. The space between two adjacent high areas on the skin-contacting surface formed by the second yarn Y2 forms a low area with a width of Wb, and Wb = 0.4 cm at this time. At the same time, the second yarn Y2 is used to form the clothing surface of the fabric and is 100% covered. Therefore, the fabric body θ2 < θ1, W1: W2 = 0.5.

[0047] According to the test method of the fabric performance of the present invention, the sweat residual rate test is carried out: 1) Prepare two samples of fabric according to 12×10 cm, one of which has a long side parallel to the low areas a2, recorded as S1; The other has a long side perpendicular to the low areas a2, recorded as S2; after balancing, the samples are weighed to obtain initial weights WS1=3.58g and WS2=3.58g; 2) 1 cm along the top and bottom of the short side is the hanging area, and the sample is hung with the skin-contacting side facing upward. The clamps clamp the two clamping areas at the top and bottom of the sample respectively and clamp the sample at a horizontal angle of 75 degrees and a pre-tension of 0.5N; 3) At a position of 2 cm from the upper short side and 5 cm from the long side of the sample, use a syringe to inject 3ML of water at a height of 1 cm from the sample surface within 5 seconds; 4) After the injection, WS1b was weighed immediately to obtain 4.96g and WS2b = 5.79g; 5) Calculate the parallel sweat residual rate (WS1b-WS1) / WS1*100%=(4.96-3.58) / 3.58*100%=38%

[0048] The knitted fabric thus formed can help to draw sweat accumulated on the skin surface away from the skin during high-intensity exercise. Part of the sweat can diffuse and evaporate from the skin-contacting surface of the fabric and the clothing surface, and part of the sweat naturally flows along the channel formed in the low area under the action of gravity and is guided out of the clothing, so that the clothing can reduce the adhesion of the fabric to the skin under high sweating conditions, and can still reduce the weight of the fabric increased due to sweating while maintaining high heat dissipation. The fabric was measured according to the standard AATCC 195 "Liquid Moisture Management Properties of Textile Fabrics". The one-way moisture conduction capacity OWTC (one way transport capability) of the fabric body measured this time is 304%.Comparative Example 2

[0049] The first yarn Y1 is made of ordinary polyamide fiber (PA6 30D / 12F SD DTY), and the second yarn Y2 is made of ordinary polyamide fiber (PA6 40D / 68F SD DTY). Wherein, DPFY1 =2.5, the contact angle θ1 of the Y1 yarn is 60°, and the moisture regain MR1 of the Y1 yarn is 4.5%; DPFY2=0.56, the contact angle θ2 of the Y2 yarn is 50°, and the moisture regain MR2 of the Y2 yarn is 4.5%, and LPY1:LPY2>2.0. The two yarns Y1 and Y2 are interwoven to form a weft-knitted double-sided jacquard fabric. The first yarn Y1 is used to form a strip-shaped 3D structure on the skin-contacting surface of the fabric body. The high area formed by the raised 3D strip-shaped part has a width Wa, and Wa = 0.2 cm at this time; the space between two adjacent high areas on the skin-contacting surface formed by the second yarn Y2 forms a low area forms with a width of Wb,and Wb = 0.4 cm at this time.

[0050] At the same time, the second yarn Y2 is used to form the clothing surface of the fabric and is 100% covered. Therefore, the fabric body θ2<θ1, W1:W2= 0.5.

[0051] According to the test method of the fabric performance of the present application, the sweat residual rate test is carried out: 1) Prepare two samples of fabric according to 12×10 cm, one of which has a long side parallel to the low areas a2, denoted as S1; The other has a long side perpendicular to the low areas a2, denoted as S2; after balancing, the samples are weighed to obtain the initial weights WS1=3.58g and WS2=3.58g; 2) The top and bottom 1cm along the short side is the hanging area, and the sample is hung with the skin-contacting side facing upwards. The clamps clamp the top and bottom two clamping areas of the sample respectively and clamp the sample at a horizontal angle of 75 degrees and a pre-tension of 0.5N; 3) At a position of 2cm from the upper short side and 5cm from the long side of the sample, use a syringe to inject 3ML of water at a height of 1cm from the sample surface within 5 seconds; 4) After the injection, WS1bb = 7.06g and WS2bb = 7.49g were weighed immediately; 5) Calculate the parallel sweat residual rate (WS1bb-WS1) / WS1*100% = (7.06-3.58) / 3.58*100% = 97.2%

[0052] By comparing the two, it can be seen that the fabric designed by the present invention helps to draw sweat accumulated on the skin surface away from the skin, part of the sweat can be diffused and evaporated from the skin-contacting surface of the fabric and the clothing surface, and part of the sweat naturally flows along the channel formed in the low area under the action of gravity and is discharged from the clothing, so that the clothing can reduce the adhesion of the fabric to the skin under high sweating conditions, and can still reduce the weight of the fabric increased due to sweating while maintaining high heat dissipation.Example 3

[0053] The first yarn Y1 is made of ordinary polyester fiber (PES 75D / 144F SD DTY), and the second yarn Y2 is made of polyester fiber with water repellent function (PES 50D / 36F SD DTY). Among them, DPFY1=0.52, the contact angle θ1 of the Y1 yarn is 55°, and the moisture regain MR1 of the Y1 yarn is 0.45%; DPFY2=1.38, the contact angle θ2 of the Y2 yarn is 85°, and the moisture regain MR2 of the Y2 yarn is 0.45%, and LPY1:LPY2>2.0. The two yarns Y1 and Y2 are interwoven to form a weft-knitted double-sided jacquard fabric. The first yarn Y1 forms a strip-shaped 3D structure on the clothing surface of the fabric body. The high area formed by the raised 3D strip-shaped part has a width WF1, and WF1 = 0.25 cm at this time. The space between the two adjacent high areas of the clothing surface made of the second yarn Y2 forms a low area, and its width is WF2, and WF2 = 0.45 cm at this time. At the same time, the second yarn Y2 makes the skin-contacting layer of the fabric for 100% coverage. Therefore, the fabric body θ2 < θ1, W1: W2 = 0.55.

[0054] The knitted fabric formed in this way can help to draw sweat accumulated on the skin surface away from the skin, and part of the sweat can diffuse and evaporate from the skin-contacting surface of the fabric and the clothing surface, while the micro-texture of the clothing surface also enriches the appearance of the fabric, and the knitted fabric is measured according to the standard AATCC 195 "Liquid Moisture Management Properties of Textile Fabrics". The one-way moisture transport capability OWTC (one way transport capability) of the fabric body measured this time is 368%.

Examples

example 1

Example 1

[0040]The first yarn Y1 is made of polyester fiber (PES 40D / 24F SD DTY) with water repellent function, and the second yarn Y2 is made of ordinary polyester fiber (PES 50D / 72F SD DTY). Among them, DPFY1=1.6, the contact angle θ1 of the Y1 yarn is 135°, and the moisture regain MR1 of the Y1 yarn is 0.45%; DPFY2=0.69, the contact angle θ2 of the Y2 yarn is 55°, and the moisture regain MR2 of the Y2 yarn is 0.45%, and LPY1:LPY2>2.0 applies. The two yarns Y1 and Y2 are interwoven to form a weft-knitted single-sided jacquard fabric. The skin-contacting surface of the fabric made of the first yarn Y1 forms a strip-shaped 3D structure, and the high area formed by the raised 3D strip-shaped part has a width W1, and at this time W1=0.3cm. The space between two adjacent high areas made of the second yarn Y2 forms a low area, whose width is W2, and W2 = 0.5 cm. Therefore, the fabric body θ2 < θ1, W1: W2 = 0.6.

[0041]According to the test method of the fabric performance of the present i...

example 2

Example 2

[0046]The first yarn Y1 is made of polyamide fiber (PA6 30D / 12F SD DTY) with water repellent function, and the second yarn Y2 is made of ordinary polyamide fiber (PA6 40D / 68F SD DTY). Among them, DPFY1=2.5, the contact angle θ1 of Y1 yarn=125°, and the moisture regain MR1 of Y1 yarn is 1.9%; DPFY2=0.56, the contact angle θ2 of Y2 yarn=50°, and the moisture regain MR2 of Y2 yarn is 4.5%, and LPY1:LPY2>2.0. For the calculation method of the water conduction capacity of the yarn, please refer to the first application of the inventor (design method of differential water conduction fabric based on the capillary water conduction capacity of the fabric, CN201811089055.9). The two yarns Y1 and Y2 are interwoven to form a weft-knitted double-sided jacquard fabric. The first yarn Y1 is used to form a strip-shaped 3D structure on the skin-contacting surface of the fabric body. The high area formed by the raised 3D strip-shaped part has a width Wa, and Wa = 0.2 cm at this time. The spa...

example 3

Example 3

[0053]The first yarn Y1 is made of ordinary polyester fiber (PES 75D / 144F SD DTY), and the second yarn Y2 is made of polyester fiber with water repellent function (PES 50D / 36F SD DTY). Among them, DPFY1=0.52, the contact angle θ1 of the Y1 yarn is 55°, and the moisture regain MR1 of the Y1 yarn is 0.45%; DPFY2=1.38, the contact angle θ2 of the Y2 yarn is 85°, and the moisture regain MR2 of the Y2 yarn is 0.45%, and LPY1:LPY2>2.0. The two yarns Y1 and Y2 are interwoven to form a weft-knitted double-sided jacquard fabric. The first yarn Y1 forms a strip-shaped 3D structure on the clothing surface of the fabric body. The high area formed by the raised 3D strip-shaped part has a width WF1, and WF1 = 0.25 cm at this time. The space between the two adjacent high areas of the clothing surface made of the second yarn Y2 forms a low area, and its width is WF2, and WF2 = 0.45 cm at this time. At the same time, the second yarn Y2 makes the skin-contacting layer of the fabric for 100% ...

Claims

1. A fabric that can control sweat when worn, wherein the fabric is composed of at least two yarns Y1 and Y2, the contact angle θ1 of yarn Y1 ≥ 65° , DPFY1≤2.0, the contact angle θ2 of yarn Y2≤90° , DPFY2≤1.5, and the moisture regain (MR1) of Y1 ≤5%; the fabric surface is a strip-shaped 3D structure, the raised parts form high areas labeled a1, areas a1 have a width W1, where 0.1≤W1≤10cm, and the space between two adjacent high areas forms a low area labeled a2, areas a2 have a width W2, where 0.2≤W2≤ 5cm; the areas a1 contain yarn Y1, the areas a2 contain yarn Y2, and θ2<θ1.

2. The fabric according to claim 1, wherein Y1 and Y2 are chemical fibers, preferably the yarn moisture regain≤1.5%, and the ratio of the liquid water conductivity LPY2:LPY1 of yarn Y2 and Y1 ≥2.0.

3. The fabric according to claim 1,wherein one of Y1 or Y2 is a natural fiber or a natural fiber blended yarn, the yarn regain≤15%, the ratio of the liquid water conductivity of yarn Y2 to Y1 LPY2:LPY1 ≥2.0, and the total content of the fiber in the fabric is less than 30%.

4. The fabric according to claim 1, wherein the fabric is a weft-knitted single-sided fabric, where 0.10≤W1:W2≤2.5, preferably 0.5≤W1:W2≤0.75.

5. The fabric according to claim 1, wherein the fabric is a weft-knitted double-sided fabric, where W2 preferably covers 100% of the fabric clothing surface.

6. The fabric according to claim 5, wherein the weft-knitted double-sided fabric has a jacquard rib structure and a jacquard double-sided structure.

7. The fabric according to claim 1, wherein through holes are designed in areas a2, and the total areas occupied by all through holes≤50% of the total areas a2.

8. The fabric according to claim 1, wherein the angle (θ3) between the a2 area and the horizontal plane when the fabric is in use is 30° ≤θ3≤150° , preferably θ3 is 90° .

9. The fabric according to claim 1, wherein the fabric surface is a clothing surface, presenting a discontinuous strip 3D structure, the contact angle θ1 of the yarn Y1≤65° , DPFY1≤1.5, and the contact angle θ2 of the yarn Y2≥ 65°, DPFY2≤2.0, and the moisture regain of the Y2 yarn (MR2) ≤5%.

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