High-strength multi-dimensional moisture-conducting fabric and preparation method thereof

Abstract

The invention belongs to the technical field of moisture-conducting fabrics, and relates to a high-strength multi-dimensional moisture-conducting fabric and a preparation method thereof.The product is a three-dimensional orthogonal woven fabric with a four-layer plane structure and comprises warp, weft and binding warp, and the binding warp penetrates through the thickness direction of the fabric and connects the weft in each layer into a whole; the four layers of plane structures are formed by weft yarns arranged in parallel, and are sequentially a hydrophilic layer, a secondary hydrophilic layer, a secondary hydrophobic layer and a hydrophobic layer from top to bottom; during preparation, three warp yarns, two binding warp yarns and weft yarns in each layer are prepared, and hairiness-shaped fiber yarns forming the weft yarns in the secondary hydrophobic layer are hairiness-shaped fiber yarns with microfibers on the surfaces obtained after PP / PA6 composite fibers are soaked in an acetic acid solution and subjected to ultrasonic treatment. According to the method, the capillary effect of the plant, the asymmetric Janus effect on the two sides and the simulated plant root hair are used for achieving the one-way moisture guiding effect; the prepared product is good in moisture conduction effect and good in durability.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of moisture-conducting fabrics, and relates to a high-strength multi-dimensional moisture-conducting fabric and a preparation method thereof. BACKGROUND

[0002] In the prior art, the moisture-conducting scheme of the fabric in one direction is almost from the gradient change of capillary pores to simulate the capillary structure of plant rhizome and the difference in hydrophilicity and hydrophobicity between the inside and outside, without paying attention to the special contribution of root hair zone to the absorption of water by plants.

[0003] For example, patent CN115583084B discloses a multi-dimensional moisture-conducting and deodorizing knitted fabric and its application, which realizes the multi-dimensional moisture-conducting effect of water by using the fineness, profile degree and hydrophilicity and hydrophobicity of the fiber. Overall, according to the hydrophilicity and hydrophobicity of the fiber itself, the patent divides the fabric into a hydrophilic layer, a water-conducting layer and a hydrophobic layer along the thickness direction, and the fiber cross section is a cross-shaped fiber from the hydrophobic layer to the hydrophilic layer, and the profile degree presents an increasing trend and the fineness presents a decreasing trend. In addition, the patent divides each layer into two regions, and the hydrophilicity of the two sides is higher than that of the middle, so as to realize the moisture-conducting from the middle region to the two side regions. However, the patent has the following defects: 1. The hydrophilicity of the middle of the inner side of the fabric is smaller than that of the two sides, which is easy to cause the accumulation of water in the middle to block the capillary channel. 2. According to the patent, the middle part of the middle region is still moisture-conducting along the thickness direction, and only the water in the two side parts of the middle region will be conducted to the two side regions under the action of the hydrophilic force, so the multi-dimensional moisture-conducting effect is still limited.

[0004] Patent CN114351325B discloses a high-mechanical-property one-way moisture-conducting three-dimensional orthogonal woven fabric and a preparation method thereof, which adopts yarns with different hydrophilicity and hydrophobicity distributed in each layer of the fabric, and the fiber fineness presents an increasing trend from the inner side to the outer side and the fiber diameter presents a decreasing trend. The special part is that the surface of the yarn after plasma surface treatment produces different small particles with concave-convex, the number and depth of which are obviously increased, and the surface of the yarn has obvious etching marks, the hydrophobic side surface wettability is greatly improved, the penetration rate of liquid drops from the hydrophobic side to the hydrophilic side is effectively accelerated, and the moisture-conducting effect is optimized. However, the patent has the following defects: 1. It is only one-way moisture-conducting in the thickness direction, and lacks multi-dimensional moisture-conducting capability. 2. The moisture-conducting effect is not good, and the highest one-way transfer index is only 200%, and the one-way transfer index is only about 70% after 120s.

[0005] Document 1 (Design of Special Infiltration Three-layer Fabric and Study on Its Unidirectional Moisture-wicking Performance [J]. Industrial Textiles, 2021(012): 039. DOI:10.3969 / j.issn.1004-7093.2021.12.002.) improves the hydrophobicity of the hydrophobic layer yarn through post-processing, enhances the asymmetry of the hydrophilic and hydrophobic sides of the fabric, and achieves the effect of unidirectional moisture-wicking. This method of using chemical reagents for finishing not only may pose a risk to the human body and the environment, but also the service life of unidirectional moisture-wicking will inevitably decrease with the increase of washing times.

[0006] Document 2 (Tree-like structure driven water transfer in 1D fiber assemblies for Functional Moisture-Wicking Fabrics [J]. Materials & Design, 2020, 186(000): 8. DOI:10.1016 / j.matdes.2019.108305.) simulates the root structure of a tree by controlling the fineness of micron-sized cotton fibers and the thickness of sub-micron-sized polyacrylonitrile fiber layers, and obtains a core-spun yarn with a skin-core structure, i.e. there is a skin layer composed of polyacrylonitrile fibers outside the core composed of cotton fibers. The core-spun yarn effectively transports liquid moisture from one side of the yarn to the other side. However, this document has the following defects: 1. Although the moisture-wicking performance is good, the strength is not high; 2. It cannot be produced on a large scale.

[0007] Therefore, it is of great significance to study a high-strength multi-dimensional moisture-wicking fabric and a preparation method thereof to solve the problems existing in the prior art. SUMMARY

[0008] The purpose of the present application is to solve the problems existing in the prior art and provide a high-strength multi-dimensional moisture-wicking fabric and a preparation method thereof.

[0009] To achieve the above-mentioned purpose, the technical solutions adopted by the present application are as follows:

[0010] A high-strength multi-dimensional moisture-wicking fabric is a three-dimensional orthogonal woven fabric with a four-layer planar structure, comprising warp yarns, weft yarns and binder warp yarns, the binder warp yarns penetrating through the thickness direction of the fabric and connecting the weft yarns in each layer;

[0011] The four-layer flat structure is composed of parallel arranged weft yarns, from top to bottom, a hydrophilic layer, a secondary hydrophilic layer, a secondary hydrophobic layer and a hydrophobic layer, from top to bottom, each layer is separated by warp yarns D1, D2 and D3; the fiber monofilament fineness of the weft yarns constituting the hydrophilic layer, the secondary hydrophilic layer, the secondary hydrophobic layer and the hydrophobic layer increases in turn, the weft yarns in the secondary hydrophobic layer are alternately arranged by hair-like fiber yarns (the hair-like fiber is prior art, which refers to a fiber with rich micro-fibers on the surface) and PP fiber yarns, the hydrophilicity of the hair-like fiber yarns is higher than that of the PP fiber yarns in the same layer and the weft yarns in the lower layer and lower than that of the weft yarns in the upper layer, the monofilament fineness of the hair-like fiber yarns in the secondary hydrophobic layer is lower than that of the PP fiber yarns in the same layer;

[0012] The hair-like fiber yarns are hair-like PP / PA6 composite yarns, and the surface of the hair-like fiber yarns has micro-fibers.

[0013] According to the mechanism of plant root stem conducting water, plants can transmit water from roots to branches and leaves due to the gradientized capillary structure that is continuously getting smaller from bottom to top, the fabric of the application is structured by gradually increasing the monofilament fineness and gradually reducing the yarn fineness from top to bottom, using the fact that the pores surrounded by thick fibers are large, the pores surrounded by thin fibers are small, and the pores formed by the interweaving of thick yarns are small, the pores formed by the interweaving of thin yarns are large. The capillary principle is as follows: the surface of the liquid is similar to a stretched rubber film, if the liquid surface is curved, it has the tendency to flatten. Therefore, the concave liquid surface exerts a pulling force on the underlying liquid, and the convex liquid surface exerts a pressure on the underlying liquid. The liquid surface of the wetting liquid in the capillary is concave, which exerts a pulling force on the underlying liquid, causing the liquid to rise along the wall of the tube, when the upward pulling force is equal to the gravity of the liquid column in the tube, the liquid in the tube stops rising, and reaches equilibrium.

[0014] According to the transpiration of plant leaves, due to the evaporation of water in plant leaves or other places, the water content decreases and therefore water is taken from adjacent cells, and so on, resulting in a water potential gradient from stomata to stems to roots, finally causing the roots to absorb water from the surrounding soil. The fabric of the application can also have a similar effect on the water in the vicinity by evaporation of surface water. Transpiration is mainly generated by the pores at the top of the fabric, which continuously evaporate the water inside the fabric, and this evaporation causes the fabric to continuously transport water from the bottom to the top.

[0015] The key to the ability of plant roots to absorb a large amount of water lies in the exceptionally developed root structure, many secondary roots grow on the main branches, and the secondary roots continue to grow secondary roots, these tiny and abundant root hairs increase the absorption area of water and nutrients for plants.

[0016] The present application uses the flocked fiber after fibrillation to simulate the root hair of plants, because the flocked fiber has abundant microfibers on the surface, which has a larger absorption area compared with ordinary round fibers or shaped fibers, and these microfibers will be filled in the secondary hydrophobic layer to absorb and diffuse the water transmitted from the hydrophobic layer and further conduct to the secondary hydrophilic layer. At the same time, since these microfibers are peeled off from the fibrils, the fibrils will have grooves due to the peeling of the microfibers, thereby playing a guiding role for the water conducted to the secondary hydrophobic layer.

[0017] The fabric of the present application belongs to Janus fabric, which generally refers to a material with opposite wetting properties on both sides, that is, one side of the material is hydrophilic and the other side is hydrophobic. This structure gives the material the characteristic of one-way wetting, that is, liquid drops can wet from the hydrophobic layer to the hydrophilic layer, but cannot transfer from the hydrophilic layer to the hydrophobic layer.

[0018] As a preferred technical solution:

[0019] The high-strength multi-dimensional moisture-conducting fabric as described above, wherein the weft yarn in the hydrophilic layer is composed of PA6 fiber yarn, the total fineness of the PA6 fiber yarn is 350-850D, the single filament fineness is 0.5-1.0D, and the twist is 100-300 twists / m.

[0020] The high-strength multi-dimensional moisture-conducting fabric as described above, wherein the weft yarn in the secondary hydrophilic layer is composed of PP / PA6 composite yarn, the PP / PA6 composite yarn is composed of one PP fiber yarn with a fineness of 100-320D and one PA6 fiber yarn with a fineness of 100-320D, the total fineness of the PP / PA6 composite yarn is 200-640D, the single filament fineness is 1.0-1.5D, and the twist is 100-300 twists / m.

[0021] The high-strength multi-dimensional moisture-conducting fabric as described above, wherein the total fineness of the PP fiber yarn in the secondary hydrophobic layer is 180-420D, and the total fineness of the flocked fiber yarn is 180-420D; the single filament fineness of the flocked PP / PA6 composite yarn is 1.0-1.5D, and the twist is 100-300 twists / m; the single filament fineness of the PP fiber yarn is 1.5-2.0D, and the twist is 100-300 twists / m.

[0022] The high-strength multi-dimensional moisture-conducting fabric as described above, wherein the hydrophobic layer is composed of PP fiber yarn, the total fineness of the PP fiber yarn is 90-210D, the single filament fineness is 2.0-3.0D, and the twist is 100-300 twists / m.

[0023] A high-strength multi-dimensional moisture-conducting fabric as described above, warp yarn D1 is composed of PA6 fiber yarn, the total fineness of PA6 fiber yarn is 350-850D, the single filament fineness is 0.5-1.0D, and the twist is 100-300 twists / m.

[0024] Warp yarn D2 is composed of PP / PA6 composite yarn, the PP / PA6 composite yarn is composed of one PP fiber yarn with a fineness of 100-320D and one PA6 fiber yarn with a fineness of 100-320D, the total fineness of the PP / PA6 composite yarn is 200-640D, the single filament fineness is 1.0-1.5D, and the twist is 100-300 twists / m.

[0025] Warp yarn D3 is composed of PP fiber yarn, the total fineness of the PP fiber yarn is 90-210D, the single filament fineness is 2.0-3.0D, and the twist is 100-300 twists / m.

[0026] A high-strength multi-dimensional moisture-conducting fabric as described above, the number of binder warp yarns is 2, which are respectively F1 and F2, both F1 and F2 are composed of PP / PA6 composite yarn, the PP / PA6 composite yarn is composed of one PP fiber yarn with a fineness of 90-210D and one PA6 fiber yarn with a fineness of 90-210D, the total fineness of the PP / PA6 composite yarn is 180-420D, the single filament fineness is 1.0-1.5D, and the twist is 100-300 twists / m.

[0027] The application also provides a preparation method of the high-strength multi-dimensional moisture-conducting fabric as described above, three warp yarns, two binder warp yarns and weft yarns in each layer are prepared, and after weaving, a high-strength multi-dimensional moisture-conducting fabric composed of a hydrophilic layer, a sub-hydrophilic layer, a sub-hydrophobic layer and a hydrophobic layer is obtained. The weft yarn is a hair-like fiber, which is introduced by the loom at the warp yarn opening during weaving, so that the microfibrils on the surface of the hair-like fiber are not affected during weaving, and the loom can work continuously. The PP / PA6 blended fiber filament is soaked in an acetic acid solution and treated by ultrasonic waves. The binding force between the two components in the PP / PA6 blended fiber filament is not strong, and the water molecules form a micro-water bag between the two components of PP / PA6 through ultrasonic vibration, which causes mechanical effect, leading to the separation of the two components of PP / PA6. Meanwhile, acetic acid as a weak acid can ionize hydrogen ions in the water solution without dissolving PA6. Under the joint action of water molecules and hydrogen ions, the breaking of amide bonds in PA6 is accelerated, causing the fibrillation of PA6 in the PP / PA6 blended fiber, and forming a hair-like fiber, thereby simulating the state of plant root hairs.

[0028] As a preferred technical solution:

[0029] The preparation method of the high-strength multi-dimensional moisture-conducting fabric as described above, the hair-like fiber yarn constituting the weft yarn in the secondary hydrophobic layer is formed by immersing PP / PA6 blended fiber filaments in an acetic acid solution and performing ultrasonic treatment; the PP / PA6 blended fiber filaments are prepared by using PP as a matrix phase and PA6 as a dispersed phase, and performing melt blending spinning and then FDY stretching; the content of PA6 in the PP / PA6 blended fiber filaments is 5-25wt%; the viscosity ratio of the dispersed phase and the matrix phase is 1.0-6.0; and the stretching ratio is 2.0-5.0.

[0030] The viscosity of the dispersed phase determines the flow and deformation behavior of the dispersed phase in the melt processing process, and then affects the final morphology of the blended fiber, so the viscosity ratio of the dispersed phase and the matrix phase is 1.0-6.0. Under the same dispersed phase content, the PP / PA6 blended fiber with a high viscosity ratio has a wider groove than the blended fiber with a low viscosity ratio. This is because the low-viscosity PA6 dispersed phase forms larger dispersed phase microfibers during melt spinning. On the one hand, the micron-scale grooves formed on the surface of the blended fiber are caused by the peeled dispersed phase microfibers (i.e., a small amount of microfibers and grooves are initially formed), and on the other hand, it is beneficial to further fibrillate the blended fiber subsequently to form microfibers.

[0031] The stretching ratio is 2.0-5.0. The fiber prepared by the FDY method has a long and continuous groove structure along the fiber axis, and the surface groove gradually widens as the stretching ratio increases during the spinning process.

[0032] The preparation method of the high-strength multi-dimensional moisture-conducting fabric as described above, the ultrasonic treatment is performed at a temperature of 50-90℃, a power of 100-500W, and for a time of 30-150min.

[0033] Invention principle:

[0034] In the prior art, the unidirectional moisture-conducting scheme almost all starts from the gradient change of capillary pores to simulate the capillary structure of plant rhizome and the difference in hydrophilicity and hydrophobicity between the inside and outside, and does not pay attention to the special contribution of root hairs to the absorption of water by plants.

[0035] PP chips and PA6 chips are blended to form PP / PA6 blend fibers after melt spinning. Since PA6 as a dispersed phase has low content, it can accelerate the surface enrichment of the dispersed phase. Meanwhile, the capillary wall with high surface energy can push the polar polymer PA6 to the place with high surface energy. It is found that the second phase with low number average molecular weight migrates and enriches on the surface of the incompatible polymer blend during melt processing. Low dispersed phase content and low dispersed phase molecular weight both accelerate the surface enrichment of the dispersed phase. Under the combined action of the two, the surface of the PP / PA6 composite fiber is distributed with abundant PA6 phase. Since the interface between PP and PA6 is incompatible, the interaction between them is small. By applying force to it through ultrasonic waves, the two are separated.

[0036] Ultrasonic wave is a form of mechanical energy transmission, related to wave process, and can produce linear vibration effect. The PP / PA6 composite fiber is placed in an ultrasonic instrument containing acetic acid. Since PA6 has good hydrophilicity and PP has good hydrophobicity, a small amount of water will be distributed in the interface between the two after PA6 absorbs water. Ultrasonic energy can act on the water bag formed by water molecules between PP / PA6 two components, causing high-speed fine vibration to produce changes in speed, acceleration and temperature, thereby causing mechanical effect to cause PP / PA6 two components to separate in places where the binding force is not strong. The PA6 phase will be separated from the surrounding PP phase to form a surface microfiber. Under the action of acetic acid, it will have a certain etching effect on the exposed PA6 and its root, not only intensifying the separation of PP and PA6, but also making the exposed microfiber longer, and also increasing the grooves on the surface of PP / PA6.

[0037] The present application mainly utilizes the capillary effect of plants, the Janus effect of two-sided asymmetry, and the simulation of plant root hair to realize the one-way wetting effect. When water contacts the hydrophobic layer, it will move radially upward along the pore in the fabric under the action of capillary force. At this time, the hair-like fibers of the secondary hydrophobic layer in the fabric can act as plant root hair to absorb water. On the one hand, the hair of the hair-like fiber is mainly PA6, which has good water absorption, so it can absorb water from the bottom and the side. On the other hand, the hair PA6 phase is exposed from the original fiber, which will produce grooves on the original fiber, enhancing the water conductivity of the PP / PA6 composite fiber. In this way, the water from the bottom can diffuse radially and laterally in the secondary hydrophobic layer. The hydrophilic layer and the secondary hydrophilic layer have better hydrophilicity and smaller filament fineness than the lower yarn, so they have stronger capillary force and water absorption than the lower layer, and can further conduct the water enriched in the hair-like fibers in the secondary hydrophobic layer upward.

[0038] Beneficial effects:

[0039] (1) The high-strength multi-dimensional moisture-conducting fabric has good moisture-conducting effect, good durability and high breaking strength.

[0040] (2) The preparation method of the high-strength multi-dimensional moisture-conducting fabric utilizes the capillary effect of plants, the Janus effect of two sides and the simulation of plant root hairs to realize the one-way moisture-conducting effect. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 is a longitudinal section view of the fabric structure, wherein D1, D2 and D3 represent warp yarns, F1 and F2 represent binding warp yarns (which serve to connect the layers), and the numbers 1-5 represent weft yarns;

[0042] Figure 2 is a weaving draft of the fabric, wherein the grids from left to right represent D1, D2, D3, F1 and F2 in sequence;

[0043] Figure 3 is a moisture transfer process;

[0044] Figure 4 is a scanning electron microscope image of the hair-like fiber in Example 1 after ultrasonic treatment;

[0045] Figure 5 is a moisture transfer curve of Example 1 after 5 washes;

[0046] wherein 1 is a weft yarn in a hydrophilic layer, 2 is a weft yarn in a secondary hydrophilic layer, 3 is a hair-like fiber yarn, 4 is a weft yarn in a hydrophobic layer, and 5 is a PP fiber yarn. DETAILED DESCRIPTION

[0047] The application will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the application and not to limit the scope of the application. Furthermore, it should be understood that those skilled in the art can make various modifications or changes to the application after reading the content taught by the application, and these equivalent forms also fall within the scope of the appended claims.

[0048] The test methods involved in the performance indicators in the examples and comparative examples of the application are as follows:

[0049] An SGA598 full-automatic rapier loom of Jiangyin Tongyuan Textile Machinery Co., Ltd. was used, and 3 warp yarns, 2 binding warp yarns and weft yarns in each layer were prepared, and the fabric was woven according to the weaving draft with a warp density of 400 yarns / 10 cm and a weft density of 300 yarns / 10 cm, to obtain a fabric with a length of 200±5 mm, a width of 200±5 mm and a thickness of 1.6±0.2 mm.

[0050] SEM: The morphology of the obtained fibers was observed by scanning electron microscopy (LaB6 scanning electron microscope, JEOL, Japan).

[0051] Contact angle: The hydrophilic / hydrophobic property of the fibers was analyzed by an optical contact angle measuring instrument (Model: OCA15EC). Hydrophobic test method: First, the fibers were combed and arranged into a uniform, compact and flat fiber layer, then fixed on a glass slide, and placed in the center of the platform, and a sample holder containing distilled water was placed above. Take a picture of the instant image of the distilled water contact microfiltration membrane as the main basis for calculating the water contact angle. 5 μL of liquid droplet was dropped on the sample surface, and the contact angle of the liquid droplet with the sample surface was tested at least 6 different positions on the sample, and the average value was finally taken. Hydrophilic test method: First, the fibers were combed and arranged into a uniform, compact and flat fiber layer, then fixed on a glass slide as a sample, then immersed in the test liquid (9 g / L sodium chloride aqueous solution), and the bubbles were released and captured on the sample surface. When the bubbles are transferred to the sample surface, the gas phase is spread on the sample surface by expelling the liquid phase that wets the sample surface, and the contact angle is measured. The contact angle of the liquid droplet with the sample surface was tested at least 6 different positions on the sample, and the average value was finally taken.

[0052] One-way transmission index: According to standard AATCC TM-195, the one-way moisture management tester (Model M290, SDL Atlas Company, USA) was used to test the one-way moisture transmission performance of the sample at 120 s. The sample was placed horizontally between the upper and lower resistance sensors, and 0.2 g of water was dropped in the center of the sample. When the water is conducted in the sample, the resistance change of the upper and lower surfaces of the sample will be recorded and converted into relative moisture content according to the algorithm. The test will provide a quantitative one-way moisture transmission index (R) to represent the one-way moisture transmission performance of the sample, which is defined as the difference between the cumulative relative moisture content of the upper and lower surfaces of the sample:

[0053]

[0054] where T is the test time, U t and U b are the real-time relative moisture contents of the upper and lower surfaces of the sample, respectively.

[0055] Water washing standard: According to GB / T 8629-2017, the sample was washed continuously for 5 times according to the 4N program of type A washing machine, and the sample was dried or naturally air-dried at a temperature not exceeding 60°C after washing.

[0056] Breaking strength: the mechanical properties of the fabric were tested according to the sample method of the first part of the national standard GB / T 3923.1-2013 "Textile fabric tensile properties" using a micro-controlled electronic universal testing machine (WDW3020). A pre-tension of 5.0N was applied at the bottom end of the fabric, the length between the two clamps was set to 200mm, the tensile speed was set to 100mm / min, and the average value of 10 measurements for each sample was taken.

[0057] Example 1

[0058] A high-strength multi-dimensional moisture-conducting fabric is a three-dimensional orthogonal woven fabric with a four-layer planar structure, comprising warp yarns, weft yarns and binder warp yarns, the binder warp yarns penetrating through the thickness direction of the fabric and connecting the weft yarns in each layer;

[0059] As shown in Figure 1 , the four-layer planar structure is composed of parallel arranged weft yarns, from top to bottom, a hydrophilic layer, a secondary hydrophilic layer, a secondary hydrophobic layer and a hydrophobic layer, each layer is separated from each other by warp yarns D1, D2 and D3;

[0060] The weft yarn 1 in the hydrophilic layer is composed of PA6 fiber yarns, the total fineness of the PA6 fiber yarns is 840D, the single filament fineness is 0.5D, and the twist is 300 twists / m.

[0061] The weft yarn 2 in the secondary hydrophilic layer is composed of PP / PA6 composite yarns, the PP / PA6 composite yarns are composed of one PP fiber yarn with a fineness of 315D and one PA6 fiber yarn with a fineness of 315D, the single filament fineness of the PP / PA6 composite yarns is 1.0D, and the twist is 300 twists / m; the contact angle of the PP / PA6 composite yarns is 33°;

[0062] The weft yarn in the secondary hydrophobic layer is composed of alternately arranged feather-like fiber yarns 3 and PP fiber yarns 5, the total fineness of the PP fiber yarns in the secondary hydrophobic layer is 420D, and the total fineness of the feather-like fiber yarns 3 is 420D; the feather-like fiber yarns 3 are feather-like PP / PA6 composite yarns, the single filament fineness of the feather-like PP / PA6 composite yarns is 1.0D, and the twist is 300 twists / m; the single filament fineness of the PP fiber yarns is 1.5D, and the twist is 300 twists / m; the two kinds of yarns are alternately and closely arranged on the glass slide, and the contact angle is 49° measured by the bubble trapping method.

[0063] The weft yarn 4 in the hydrophobic layer is composed of PP fiber yarns, the total fineness of the PP fiber yarns is 210D, the single filament fineness is 2.0D, and the twist is 300 twists / m; the contact angle of the PP fiber yarns is 120°;

[0064] The warp yarn D1 is composed of PA6 fiber yarns, the total fineness of the PA6 fiber yarns is 840D, the single filament fineness is 0.5D, and the twist is 300 twists / m;

[0065] The warp yarn D2 is composed of a PP / PA6 composite yarn, the PP / PA6 composite yarn is composed of a PP fiber yarn with a fineness of 315D and a PA6 fiber yarn with a fineness of 315D, the single filament fineness of the PP / PA6 composite yarn is 1.0D, and the twist is 300 twists / m; the contact angle of the PP / PA6 composite yarn is 33°;

[0066] The warp yarn D3 is composed of a PP fiber yarn, the total fineness of the PP fiber yarn is 210D, the single filament fineness is 2.0D, and the twist is 300 twists / m;

[0067] The number of the binder warp yarns is 2, which are respectively F1 and F2, both F1 and F2 are composed of a PP / PA6 composite yarn, the PP / PA6 composite yarn is composed of a PP fiber yarn with a fineness of 210D and a PA6 fiber yarn with a fineness of 210D, the single filament fineness of the PP / PA6 composite yarn is 1.0D, and the twist is 300 twists / m;

[0068] The warp breaking strength of the high-strength multi-dimensional moisture-conducting fabric is 25.4 MPa, the weft breaking strength is 60.6 MPa, the contact angle is 52°, the one-way transfer index is 663%, the maximum wetting radius of the hydrophobic surface is 5 mm, and the maximum wetting radius of the hydrophilic surface is 20 mm; as shown in Figure 5 , the one-way transfer index after 5 times of water washing is 581%.

[0069] The preparation method of the above high-strength multi-dimensional moisture-conducting fabric is as follows:

[0070] (1) PP (number average molecular weight: 121000 g / mol) is used as the matrix phase, PA6 (number average molecular weight: 82000 g / mol) is used as the dispersed phase, and PP / PA6 blended fiber filaments are prepared by melt blending and spinning and then FDY stretching; the content of PA6 in the PP / PA6 blended fiber filaments is 25wt%;

[0071] Among them, the viscosity ratio of the dispersed phase and the matrix phase is 1.5, and the draw ratio is 4.0;

[0072] (2) Prepare 3 warp yarns, 2 binder warp yarns, and weft yarns in each layer, and weave to obtain a high-strength multi-dimensional moisture-conducting fabric;

[0073] Among them, the hair-like fiber yarns constituting the weft yarns in the secondary hydrophobic layer have microfibers on the surface, as shown in Figure 4 , which are formed by immersing the PP / PA6 blended fiber filaments in an acetic acid solution and ultrasonic treatment, specifically, immersing the PP / PA6 blended fiber filaments in a 30% acetic acid solution, ultrasonic treatment at a temperature of 90℃ and a power of 500W for 150min, then cleaning in deionized water and drying.

[0074] Figure 2 (a) is a tissue map, during weaving, the rapier loom will pass the warp yarns according to Figure 2 (b) Working: Step 1: F2 yarn is lifted, D1 to F1 yarn is lowered, at the same time the first weft yarn is inserted; Step 2: D1 and F2 yarns are lifted, D2 to F1 yarn is lowered, at the same time the second weft yarn is inserted; Step 3: D1, D2 and F2 yarns are lifted, D3 and F1 yarns are lowered, at the same time the third weft yarn is inserted; Step 4: D1, D2, D3 and F2 yarns are lifted, F1 yarn is lowered, at the same time the fourth weft yarn is inserted; Step 5: D1 to F1 yarns are lifted, F2 yarn is lowered, at the same time the fifth weft yarn is inserted; Step 6: D1, D2 and F1 yarns are lifted, D3 and F2 yarns are lowered, at the same time the sixth weft yarn is inserted; Step 7: D1 and F1 yarns are lifted, D2, D3 and F2 yarns are lowered, at the same time the seventh weft yarn is inserted; Step 8: F1 yarn is lifted, D1, D2, D3 and F2 yarns are lowered, at the same time the eighth weft yarn is inserted.

[0075] Figure 3 The moisture should be mainly conducted in three directions during the transmission process: 1. spreading along the bottom surface of the fabric; 2. transferring along the capillary hole gradient from the weft yarn 4 in the hydrophobic layer to the weft yarn 1 in the hydrophilic layer; 3. due to the special structure of the hair-like fiber yarn 3 in the secondary hydrophobic layer, the attraction to the moisture is greater than that of the surrounding weft yarn 4 in the hydrophobic layer and the PP fiber yarn 5, thereby causing oblique transmission of the moisture.

[0076] Comparative Example 1

[0077] A multi-dimensional moisture-conducting fabric, which is basically the same as Example 1, except that the total fineness of the weft yarns in the hydrophilic layer, the secondary hydrophilic layer, the secondary hydrophobic layer and the hydrophobic layer is reversed, i.e. the multi-dimensional moisture-conducting fabric is a three-dimensional orthogonal woven fabric with a four-layer planar structure, including warp yarns, weft yarns and binder warp yarns, the binder warp yarns run through the thickness direction of the fabric and connect the weft yarns in each layer;

[0078] The four-layer planar structure is composed of parallel arranged weft yarns, from top to bottom, the hydrophilic layer, the secondary hydrophilic layer, the secondary hydrophobic layer and the hydrophobic layer, each layer is separated from each other by warp yarns D1, D2 and D3;

[0079] The weft yarns in the hydrophilic layer are composed of PA6 fiber yarns, the total fineness of the PA6 fiber yarns is 210D, the single filament fineness is 2.0D, and the twist is 300 twists / m.

[0080] The weft yarn in the secondary hydrophilic layer is composed of PP / PA6 composite yarn, the PP / PA6 composite yarn is composed of one PP fiber yarn with a fineness of 210D and one PA6 fiber yarn with a fineness of 210D, the single filament fineness of the PP / PA6 composite yarn is 1.5D, and the twist is 300 twists / m; the contact angle of the PP / PA6 composite yarn is 33°;

[0081] The weft yarn in the secondary hydrophobic layer is composed of feather-like fiber yarn and PP fiber yarn arranged alternately, the total fineness of the PP fiber yarn in the secondary hydrophobic layer is 630D, and the total fineness of the feather-like fiber yarn is 630D; the feather-like fiber yarn is feather-like PP / PA6 composite fiber, the single filament fineness of the feather-like PP / PA6 composite yarn is 1.0D, and the twist is 300 twists / m; the single filament fineness of the PP fiber yarn is 1.5D, and the twist is 300 twists / m; the two kinds of yarns are arranged alternately and closely and uniformly on a glass slide, and the contact angle is 49° measured by the bubble trapping method.

[0082] The weft yarn in the hydrophobic layer is composed of PP fiber yarn, the total fineness of the PP fiber yarn is 840D, the single filament fineness is 0.5D, and the twist is 300 twists / m; the contact angle of the PP fiber yarn is 120°.

[0083] The warp yarn D1 is composed of PA6 fiber yarn, the total fineness of the PA6 fiber yarn is 210D, the single filament fineness is 2.0D, and the twist is 300 twists / m;

[0084] The warp yarn D2 is composed of PP / PA6 composite yarn, the PP / PA6 composite yarn is composed of one PP fiber yarn with a fineness of 210D and one PA6 fiber yarn with a fineness of 210D, the single filament fineness of the PP / PA6 composite yarn is 1.5D, and the twist is 300 twists / m; the contact angle of the PP / PA6 composite yarn is 33°;

[0085] The warp yarn D3 is composed of PP fiber yarn, the total fineness of the PP fiber yarn is 840D, the single filament fineness is 0.5D, and the twist is 300 twists / m;

[0086] The number of the binding warp yarn is 2, which are respectively F1 and F2, both F1 and F2 are composed of PP / PA6 composite yarn, the PP / PA6 composite yarn is composed of one PP fiber yarn with a fineness of 210D and one PA6 fiber yarn with a fineness of 210D, the single filament fineness of the PP / PA6 composite yarn is 1.0D, and the twist is 300 twists / m;

[0087] The contact angle of the multi-dimensional moisture-conducting fabric is 39°, the one-way transmission index is 292%, the maximum wetting radius of the hydrophobic surface is 5mm, and the maximum wetting radius of the hydrophilic surface is 20mm.

[0088] Comparative Example 1 and Example 1 are compared, and it is found that the one-way transmission index is obviously decreased. The hydrophilic layer yarn diameter of Example 1 is larger and the monofilament fineness is smaller, so that the yarns and fibers are relatively close, thus the hydrophobic layer is large-pore distribution and the hydrophilic layer is small-pore distribution, the fabric as a whole forms a positive conical pore gradient distribution, and in the transmission process of water from the hydrophobic side to the hydrophilic side, the water can be continuously subjected to capillary tension.

[0089] The hydrophilic layer yarn diameter of Comparative Example 1 is smaller and the monofilament fineness is larger, so that the yarns and fibers are relatively loose, thus the hydrophobic layer is small-pore distribution and the hydrophilic layer is large-pore distribution, the fabric as a whole forms an inverted conical pore gradient distribution, although it can also achieve transmission from the hydrophobic layer to the hydrophilic layer, but in the transmission process of water from the hydrophobic layer to the hydrophilic layer, due to the gradual decrease of capillary tension, water is trapped in the middle and is difficult to continuously transmit to the hydrophilic layer.

[0090] Comparative Example 2

[0091] A preparation method of a multi-dimensional moisture-conducting fabric, which is basically the same as Example 1, except that the ultrasonic treatment in step (2) is omitted, that is, a common PP / PA6 composite yarn is prepared instead of a hair-like fiber yarn.

[0092] The contact angle of the multi-dimensional moisture-conducting fabric is 10°, the one-way transmission index is 423%, the maximum wetted radius of the hydrophobic surface is 5mm, and the maximum wetted radius of the hydrophilic surface is 10mm.

[0093] Comparative Example 2 and Example 1 are compared, and it is found that not only the one-way transmission index is decreased, but also the maximum wetted radius of the hydrophilic surface is reduced, because the secondary hydrophobic layer of Example 1 can further diffuse and conduct water due to the hair-like fiber yarn, resulting in a larger water diffusion range of Example 1.

[0094] Example 2

[0095] A high-strength multi-dimensional moisture-conducting fabric is a three-dimensional orthogonal woven fabric with a four-layer planar structure, which includes warp yarns, weft yarns and binder warp yarns, the binder warp yarns penetrate through the thickness direction of the fabric and connect the weft yarns in each layer;

[0096] The four-layer planar structure is composed of parallel arranged weft yarns, and from top to bottom, it is a hydrophilic layer, a secondary hydrophilic layer, a secondary hydrophobic layer and a hydrophobic layer, each layer is separated from each other by warp yarns D1, D2 and D3;

[0097] The weft yarns in the hydrophilic layer are composed of PA6 fiber yarns, the total fineness of the PA6 fiber yarns is 720D, the monofilament fineness is 0.5D, and the twist is 250 twists / m;

[0098] The weft yarn in the secondary hydrophilic layer is composed of PP / PA6 composite yarn, the PP / PA6 composite yarn is composed of one PP fiber yarn with a fineness of 270D and one PA6 fiber yarn with a fineness of 270D, the single filament fineness of the PP / PA6 composite yarn is 1.0D, and the twist is 250 twists / m; the contact angle of the PP / PA6 composite yarn is 31°;

[0099] The weft yarn in the secondary hydrophobic layer is composed of feather-like fiber yarn and PP fiber yarn arranged alternately, the total fineness of the PP fiber yarn in the secondary hydrophobic layer is 360D, and the total fineness of the feather-like fiber yarn is 360D; the feather-like fiber yarn is feather-like PP / PA6 composite yarn, the single filament fineness of the feather-like PP / PA6 composite yarn is 1.0D, and the twist is 250 twists / m; the single filament fineness of the PP fiber yarn is 1.5D, and the twist is 250 twists / m; the two kinds of yarns are arranged alternately and closely and uniformly on a glass slide, and the contact angle is 50° measured by the bubble trapping method.

[0100] The weft yarn in the hydrophobic layer is composed of PP fiber yarn, the total fineness of the PP fiber yarn is 180D, the single filament fineness is 2.0D, and the twist is 250 twists / m; the contact angle of the PP fiber yarn is 120°;

[0101] The warp yarn D1 is composed of PA6 fiber yarn, the total fineness of the PA6 fiber yarn is 720D, the single filament fineness is 0.5D, and the twist is 250 twists / m;

[0102] The warp yarn D2 is composed of PP / PA6 composite yarn, the PP / PA6 composite yarn is composed of one PP fiber yarn with a fineness of 270D and one PA6 fiber yarn with a fineness of 270D, the single filament fineness of the PP / PA6 composite yarn is 1.0D, and the twist is 250 twists / m; the contact angle of the PP / PA6 composite yarn is 33°;

[0103] The warp yarn D3 is composed of PP fiber yarn, the total fineness of the PP fiber yarn is 180D, the single filament fineness is 2.0D, and the twist is 250 twists / m; the contact angle of the PP fiber yarn is 120°.

[0104] The number of the binding warp yarns is 2, which are respectively F1 and F2, both F1 and F2 are composed of PP / PA6 composite yarn, the PP / PA6 composite yarn is composed of one PP fiber yarn with a fineness of 180D and one PA6 fiber yarn with a fineness of 180D, the single filament fineness of the PP / PA6 composite yarn is 1.0D, and the twist is 250 twists / m;

[0105] The high-strength multi-dimensional moisture-conducting fabric has a warp breaking strength of 22.7 MPa, a weft breaking strength of 54.8 MPa, a contact angle of 52°, a one-way transfer index of 608%, a maximum wetting radius of the hydrophobic surface of 5 mm, and a maximum wetting radius of the hydrophilic surface of 20 mm; the one-way transfer index after 5 washes is 568%.

[0106] The preparation method of the above-mentioned high-strength multi-dimensional moisture-conducting fabric comprises the following specific steps:

[0107] (1) PP (number average molecular weight: 121000 g / mol) was used as the matrix phase and PA6 (number average molecular weight: 82000 g / mol) was used as the dispersed phase. PP / PA6 blended fiber filaments were prepared by melt blending and then stretched by FDY. The PA6 content in the PP / PA6 blended fiber filaments was 20 wt%;

[0108] Among them, the viscosity ratio of the dispersed phase to the matrix phase is 2.0, and the stretching ratio is 3.5;

[0109] (2) preparing three warp yarns, two binding warp yarns and weft yarns in each layer, and weaving them on a machine to obtain a high-strength multi-dimensional moisture-conducting fabric;

[0110] Among them, the hairy fiber yarn constituting the weft yarn in the secondary hydrophobic layer has microfibers on its surface, which is formed by immersing the PP / PA6 blended fiber filament in an acetic acid solution and then ultrasonically treating it. Specifically, the PP / PA6 blended fiber filament is immersed in a 30wt% acetic acid solution, ultrasonically treated at a temperature of 80°C and a power of 400W for 120 minutes, and then cleaned in deionized water and dried.

[0111] Example 3

[0112] A high-strength, multi-dimensional moisture-conducting fabric is a three-dimensional orthogonal woven fabric with a four-layer planar structure, comprising warp yarns, weft yarns, and binding warp yarns, wherein the binding warp yarns run through the thickness direction of the fabric and connect the weft yarns in each layer;

[0113] The four-layer planar structure is composed of parallel weft yarns, which are hydrophilic layer, sub-hydrophilic layer, sub-hydrophobic layer and hydrophobic layer from top to bottom. Each layer is separated from each other by warp yarns D1, D2 and D3 respectively.

[0114] The weft yarn in the hydrophilic layer is composed of PA6 fiber yarn, the total fineness of the PA6 fiber yarn is 600D, the single yarn fineness is 1.0D, and the twist is 200 twists / m;

[0115] The weft yarn in the secondary hydrophilic layer is composed of PP / PA6 composite yarn, the PP / PA6 composite yarn is composed of one PP fiber yarn with a fineness of 225D and one PA6 fiber yarn with a fineness of 225D, the single filament fineness of the PP / PA6 composite yarn is 1.5D, and the twist is 200 twists / m; the contact angle of the PP / PA6 composite yarn is 35°;

[0116] The weft yarn in the secondary hydrophobic layer is composed of feather-like fiber yarn and PP fiber yarn arranged alternately, the total fineness of the PP fiber yarn in the secondary hydrophobic layer is 300D, and the total fineness of the feather-like fiber yarn is 300D; the feather-like fiber yarn is feather-like PP / PA6 composite fiber, the single filament fineness of the feather-like PP / PA6 composite yarn is 1.5D, and the twist is 200 twists / m; the single filament fineness of the PP fiber yarn is 2.0D, and the twist is 200 twists / m; the two kinds of yarns are arranged alternately and closely and uniformly on a glass slide, and the contact angle is 53° measured by the bubble trapping method.

[0117] The weft yarn in the hydrophobic layer is composed of PP fiber yarn, the total fineness of the PP fiber yarn is 150D, the single filament fineness is 3.0D, and the twist is 200 twists / m; the contact angle of the PP fiber yarn is 120°;

[0118] The warp yarn D1 is composed of PA6 fiber yarn, the total fineness of the PA6 fiber yarn is 600D, the single filament fineness is 1.0D, and the twist is 200 twists / m;

[0119] The warp yarn D2 is composed of PP / PA6 composite yarn, the PP / PA6 composite yarn is composed of one PP fiber yarn with a fineness of 225D and one PA6 fiber yarn with a fineness of 225D, the single filament fineness of the PP / PA6 composite yarn is 1.5D, and the twist is 200 twists / m; the contact angle of the PP / PA6 composite yarn is 33°;

[0120] The warp yarn D3 is composed of PP fiber yarn, the total fineness of the PP fiber yarn is 150D, the single filament fineness is 3.0D, and the twist is 200 twists / m; the contact angle of the PP fiber yarn is 120°.

[0121] The number of the binding warp yarns is 2, which are respectively F1 and F2, both F1 and F2 are composed of PP / PA6 composite yarn, the PP / PA6 composite yarn is composed of one PP fiber yarn with a fineness of 150D and one PA6 fiber yarn with a fineness of 150D, the single filament fineness of the PP / PA6 composite yarn is 1.5D, and the twist is 200 twists / m;

[0122] The high-strength multi-dimensional moisture-conducting fabric has a warp breaking strength of 18.3 MPa, a weft breaking strength of 49.6 MPa, a contact angle of 52°, a one-way transfer index of 607%, a maximum wetting radius of a hydrophobic surface of 5 mm, and a maximum wetting radius of a hydrophilic surface of 20 mm; and the one-way transfer index is 589% after 5 water washes.

[0123] The preparation method of the high-strength multi-dimensional moisture-conducting fabric is as follows:

[0124] (1) PP (number average molecular weight: 121000 g / mol) is used as a matrix phase, and PA6 (number average molecular weight: 82000 g / mol) is used as a dispersed phase to prepare a PP / PA6 blended fiber filament by melt blending and spinning and then FDY stretching; the content of PA6 in the PP / PA6 blended fiber filament is 15 wt%;

[0125] The viscosity ratio of the dispersed phase to the matrix phase is 3.0, and the draw ratio is 3.0.

[0126] (2) 3 warp yarns, 2 binder warp yarns, and weft yarns in each layer are prepared to weave the high-strength multi-dimensional moisture-conducting fabric.

[0127] The surface of the hair-like fiber yarn constituting the weft yarn in the secondary hydrophobic layer has microfibers, which are formed by immersing the PP / PA6 blended fiber filament in an acetic acid solution and ultrasonic treatment, specifically, immersing the PP / PA6 blended fiber filament in a 30 wt% acetic acid solution, ultrasonic treatment at a temperature of 70°C and a power of 300W for 90 min, then cleaning in deionized water and drying.

[0128] Example 4

[0129] A high-strength multi-dimensional moisture-conducting fabric is a three-dimensional orthogonal woven fabric with a four-layer planar structure, which includes warp yarns, weft yarns, and binder warp yarns, the binder warp yarns pass through the thickness direction of the fabric and connect the weft yarns in each layer.

[0130] The four-layer planar structure is composed of parallel weft yarns, and the four layers are a hydrophilic layer, a secondary hydrophilic layer, a secondary hydrophobic layer, and a hydrophobic layer from top to bottom, respectively, which are separated by warp yarns D1, D2, and D3.

[0131] The weft yarns in the hydrophilic layer are composed of PA6 fiber yarns, the total fineness of the PA6 fiber yarns is 480D, the single filament fineness is 1.0D, and the twist is 150 twists / m.

[0132] The weft yarn in the secondary hydrophilic layer is composed of PP / PA6 composite yarn, the PP / PA6 composite yarn is composed of one PP fiber yarn with a fineness of 180D and one PA6 fiber yarn with a fineness of 180D, the single filament fineness of the PP / PA6 composite yarn is 1.5D, and the twist is 150 twists / m; the contact angle of the PP / PA6 composite yarn is 33°;

[0133] The weft yarn in the secondary hydrophobic layer is composed of feather-like fiber yarn and PP fiber yarn arranged alternately, the total fineness of the PP fiber yarn in the secondary hydrophobic layer is 240D, and the total fineness of the feather-like fiber yarn is 240D; the feather-like fiber yarn is feather-like PP / PA6 composite fiber, the single filament fineness of the feather-like PP / PA6 composite yarn is 1.5D, and the twist is 150 twists / m; the single filament fineness of the PP fiber yarn is 2.0D, and the twist is 150 twists / m; the two kinds of yarns are arranged alternately and closely and uniformly on a glass slide, and the contact angle is 52° measured by the bubble trapping method.

[0134] The weft yarn in the hydrophobic layer is composed of PP fiber yarn, the total fineness of the PP fiber yarn is 120D, the single filament fineness is 3.0D, and the twist is 150 twists / m; the contact angle of the PP fiber yarn is 120°;

[0135] The warp yarn D1 is composed of PA6 fiber yarn, the total fineness of the PA6 fiber yarn is 480D, the single filament fineness is 1.0D, and the twist is 150 twists / m;

[0136] The warp yarn D2 is composed of PP / PA6 composite yarn, the PP / PA6 composite yarn is composed of one PP fiber yarn with a fineness of 180D and one PA6 fiber yarn with a fineness of 180D, the single filament fineness of the PP / PA6 composite yarn is 1.5D, and the twist is 150 twists / m; the contact angle of the PP / PA6 composite yarn is 33°;

[0137] The warp yarn D3 is composed of PP fiber yarn, the total fineness of the PP fiber yarn is 120D, the single filament fineness is 3.0D, and the twist is 150 twists / m; the contact angle of the PP fiber yarn is 120°.

[0138] The number of the binding warp yarns is 2, which are respectively F1 and F2, both F1 and F2 are composed of PP / PA6 composite yarn, the PP / PA6 composite yarn is composed of one PP fiber yarn with a fineness of 120D and one PA6 fiber yarn with a fineness of 120D, the single filament fineness of the PP / PA6 composite yarn is 1.5D, and the twist is 150 twists / m;

[0139] The high-strength multi-dimensional moisture-conducting fabric has a warp breaking strength of 16.6 MPa, a weft breaking strength of 43.2 MPa, a contact angle of 52°, a one-way transfer index of 601%, a maximum wetting radius of a hydrophobic surface of 5 mm, and a maximum wetting radius of a hydrophilic surface of 20 mm; and the one-way transfer index is 552% after 5 water washes.

[0140] The preparation method of the high-strength multi-dimensional moisture-conducting fabric is as follows:

[0141] (1) PP (number average molecular weight: 121000 g / mol) is used as a matrix phase, PA6 (82000 g / mol) is used as a dispersed phase, PP / PA6 blended fiber filaments are prepared by melt blending and spinning and then FDY stretching; the content of PA6 in the PP / PA6 blended fiber filaments is 10 wt%;

[0142] The viscosity ratio of the dispersed phase and the matrix phase is 4.5, and the draw ratio is 2.5.

[0143] (2) 3 warp yarns, 2 binder warp yarns, and weft yarns in each layer are prepared, and a high-strength multi-dimensional moisture-conducting fabric is woven on a loom.

[0144] The surface of the hair-like fiber yarn constituting the weft yarn in the secondary hydrophobic layer has microfibers, which are formed by immersing the PP / PA6 blended fiber filaments in an acetic acid solution and ultrasonic treatment, specifically, immersing the PP / PA6 blended fiber filaments in a 30 wt% acetic acid solution, ultrasonic treatment at a temperature of 60°C and a power of 200W for 60 min, then cleaning in deionized water and drying.

[0145] Example 5

[0146] A high-strength multi-dimensional moisture-conducting fabric is a three-dimensional orthogonal woven fabric with a four-layer planar structure, which includes warp yarns, weft yarns, and binder warp yarns, the binder warp yarns pass through the thickness direction of the fabric and connect the weft yarns in each layer.

[0147] The four-layer planar structure is composed of parallel arranged weft yarns, and the four layers are a hydrophilic layer, a secondary hydrophilic layer, a secondary hydrophobic layer, and a hydrophobic layer from top to bottom, respectively, which are separated by warp yarns D1, D2, and D3.

[0148] The weft yarns in the hydrophilic layer are composed of PA6 fiber yarns, the total fineness of the PA6 fiber yarns is 360D, the single filament fineness is 1.0D, and the twist is 100 twists / m.

[0149] The weft yarn in the secondary hydrophilic layer is composed of PP / PA6 composite yarn, the PP / PA6 composite yarn is composed of one PP fiber yarn with a fineness of 135D and one PA6 fiber yarn with a fineness of 135D, the single filament fineness of the PP / PA6 composite yarn is 1.5D, and the twist is 100 twists / m; the contact angle of the PP / PA6 composite yarn is 32°;

[0150] The weft yarn in the secondary hydrophobic layer is composed of feather-like fiber yarn and PP fiber yarn arranged alternately, the total fineness of the PP fiber yarn in the secondary hydrophobic layer is 180D, and the total fineness of the feather-like fiber yarn is 180D; the feather-like fiber yarn is feather-like PP / PA6 composite fiber, the single filament fineness of the feather-like PP / PA6 composite yarn is 1.5D, and the twist is 100 twists / m; the single filament fineness of the PP fiber yarn is 2.0D, and the twist is 100 twists / m; the two kinds of yarns are arranged alternately and closely and uniformly on the glass slide, and the contact angle is 52° measured by the bubble trapping method.

[0151] The weft yarn in the hydrophobic layer is composed of PP fiber yarn, the total fineness of the PP fiber yarn is 90D, the single filament fineness is 3.0D, and the twist is 100 twists / m; the contact angle of the PP fiber yarn is 120°;

[0152] The warp yarn D1 is composed of PA6 fiber yarn, the total fineness of the PA6 fiber yarn is 360D, the single filament fineness is 1.0D, and the twist is 100 twists / m;

[0153] The warp yarn D2 is composed of PP / PA6 composite yarn, the PP / PA6 composite yarn is composed of one PP fiber yarn with a fineness of 135D and one PA6 fiber yarn with a fineness of 135D, the single filament fineness of the PP / PA6 composite yarn is 1.5D, and the twist is 100 twists / m; the contact angle of the PP / PA6 composite yarn is 32°;

[0154] The warp yarn D3 is composed of PP fiber yarn, the total fineness of the PP fiber yarn is 90D, the single filament fineness is 3.0D, and the twist is 100 twists / m; the contact angle of the PP fiber yarn is 120°.

[0155] The number of the binding warp yarn is 2, which are respectively F1 and F2, both F1 and F2 are composed of PP / PA6 composite yarn, the PP / PA6 composite yarn is composed of one PP fiber yarn with a fineness of 90D and one PA6 fiber yarn with a fineness of 90D, the single filament fineness of the PP / PA6 composite yarn is 1.5D, and the twist is 100 twists / m;

[0156] The high-strength multi-dimensional moisture-conducting fabric has a warp breaking strength of 13.5 MPa, a weft breaking strength of 38.9 MPa, a contact angle of 52°, a one-way transmission index of 589%, a maximum wetting radius of a hydrophobic surface of 5 mm, and a maximum wetting radius of a hydrophilic surface of 20 mm; and the one-way transmission index is 500% after 5 washes.

[0157] The preparation method of the high-strength multi-dimensional moisture-conducting fabric is as follows:

[0158] (1) PP (number average molecular weight: 121000 g / mol) is used as a matrix phase, and PA6 (number average molecular weight: 82000 g / mol) is used as a dispersed phase to prepare a PP / PA6 blended fiber filament by melt blending and spinning and then by FDY stretching; the content of PA6 in the PP / PA6 blended fiber filament is 5 wt%;

[0159] The viscosity ratio of the dispersed phase and the matrix phase is 6, and the draw ratio is 2.0.

[0160] (2) Three warp yarns, two binder warp yarns, and weft yarns in each layer are prepared, and a high-strength multi-dimensional moisture-conducting fabric is woven on a loom.

[0161] The surface of the hair-like fiber yarn that constitutes the weft yarn in the secondary hydrophobic layer has microfibers, which are formed by immersing the PP / PA6 blended fiber filament in an acetic acid solution and then ultrasonic treatment, specifically, by immersing the PP / PA6 blended fiber filament in a 30% acetic acid solution, ultrasonic treatment at a temperature of 50°C and a power of 100 W for 30 min, cleaning in deionized water, and drying.

Claims

1. A high-strength multi-dimensional moisture-conducting fabric, characterized by: It is a three-dimensional orthogonal woven fabric with a four-layer planar structure, including warp yarns, weft yarns and binding warp yarns, and the binding warp yarns run through the thickness direction of the fabric and connect the weft yarns in each layer; The four-layer planar structure is composed of parallel weft yarns, which are, from top to bottom, a hydrophilic layer, a sub-hydrophilic layer, a sub-hydrophobic layer, and a hydrophobic layer. Each layer is separated from each other by warp yarns D1, D2, and D3, respectively. The fiber monofilament fineness of the weft yarns in the hydrophilic layer, the sub-hydrophilic layer, the sub-hydrophobic layer, and the hydrophobic layer increases in sequence. The weft yarns in the sub-hydrophobic layer are composed of hairy fiber yarns and PP fiber yarns arranged alternately. The hydrophilicity of the hairy fiber yarns is higher than that of the PP fiber yarns in the same layer and the weft yarns in the lower layer, but lower than that of the weft yarns in the upper layer. The monofilament fineness of the hairy fiber yarns is lower than that of the PP fiber yarns in the same layer. The hairy fiber yarn is a hairy PP / PA6 composite yarn having microfibers on its surface.

2. A high-strength multi-dimensional moisture-conducting fabric according to claim 1, characterized in that: The weft yarn in the hydrophilic layer is composed of PA6 fiber yarn, the total fineness of the PA6 fiber yarn is 350-850D, the single yarn fineness is 0.5-1.0D, and the twist is 100-300 twists / m.

3. The high-strength multi-dimensional moisture-conducting fabric according to claim 1, characterized in that: The weft yarn in the secondary hydrophilic layer is composed of a PP / PA6 composite yarn, which is composed of a PP fiber yarn with a fineness of 100-320D and a PA6 fiber yarn with a fineness of 100-320D. The single fiber fineness of the PP / PA6 composite yarn is 1.0-1.5D, and the twist is 100-300 twists / m.

4. The high-strength multi-dimensional moisture-conducting fabric according to claim 1, characterized in that: The total fineness of the PP fiber yarn in the secondary hydrophobic layer is 180-420D, and the total fineness of the hairy fiber yarn is 180-420D; the single filament fineness of the hairy PP / PA6 composite yarn is 1.0-1.5D, and the twist is 100-300 twists / m; the single filament fineness of the PP fiber yarn is 1.5-2.0D, and the twist is 100-300 twists / m.

5. The high-strength multi-dimensional moisture-conducting fabric according to claim 1, characterized in that: The hydrophobic layer is composed of PP fiber yarns. The total fineness of the PP fiber yarns is 90-210D, the single yarn fineness is 2.0-3.0D, and the twist is 100-300 twists / m.

6. The high-strength multi-dimensional moisture-conducting fabric according to claim 1, characterized in that: The warp yarn D1 is composed of PA6 fiber yarn, the total fineness of the PA6 fiber yarn is 350 to 850D, the single yarn fineness is 0.5 to 1.0D, and the twist is 100 to 300 twists / m; The warp yarn D2 is composed of a PP / PA6 composite yarn, which is composed of a PP fiber yarn with a fineness of 100 to 320D and a PA6 fiber yarn with a fineness of 100 to 320D. The single filament fineness of the PP / PA6 composite yarn is 1.0 to 1.5D, and the twist is 100 to 300 twists / m. The warp yarn D3 is composed of PP fiber yarn, the total fineness of the PP fiber yarn is 90 to 210D, the single yarn fineness is 2.0 to 3.0D, and the twist is 100 to 300 twists / m.

7. The high-strength multi-dimensional moisture-conducting fabric according to claim 1, characterized in that: The number of binding warp yarns is 2, which are denoted as F1 and F2 respectively. Both F1 and F2 are composed of PP / PA6 composite yarns. The PP / PA6 composite yarn is composed of a PP fiber yarn with a fineness of 90 to 210D and a PA6 fiber yarn with a fineness of 90 to 210D. The single filament fineness of the PP / PA6 composite yarn is 1.0 to 1.5D, and the twist is 100 to 300 twists / m.

8. The method for preparing a high-strength multi-dimensional moisture-conducting fabric according to any one of claims 1 to 7, characterized in that: Prepare 3 warp yarns, 2 binding warp yarns and weft yarns in each layer, and after weaving on a machine, obtain a high-strength multi-dimensional moisture-conducting fabric consisting of a hydrophilic layer, a sub-hydrophilic layer, a sub-hydrophobic layer and a hydrophobic layer.

9. The method for preparing a high-strength multi-dimensional moisture-conducting fabric according to claim 8, characterized in that: The hairy fiber yarn constituting the weft yarn in the secondary hydrophobic layer is formed by immersing PP / PA6 blended fiber filaments in an acetic acid solution and then ultrasonically treating the PP / PA6 blended fiber filaments. The PP / PA6 blended fiber filaments are prepared by melt-blending spinning with PP as a matrix phase and PA6 as a dispersed phase, followed by FDY stretching. The PA6 content in the PP / PA6 blended fiber filaments is 5 to 25 wt%. The viscosity ratio of the dispersed phase to the matrix phase is 1.0 to 6.

0. The stretching ratio is 2.0 to 5.

0.

10. The method for preparing a high-strength multi-dimensional moisture-conducting fabric according to claim 9, characterized in that: The temperature of ultrasonic treatment is 50-90° C., the power is 100-500 W, and the time is 30-150 min.

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