A one-way moisture conducting, moisture absorbing and quick drying nonwoven material and its preparation method and application

Abstract

The application discloses a one-way wet guiding, moisture-absorbing and quick-drying non-woven material, which comprises the following raw materials in mass fraction: 30-70% of hydrophilic polyester fiber web and 30-70% of polyamide 6 fiber web with special-shaped section; the basis weight of the one-way wet guiding, moisture-absorbing and quick-drying non-woven material is 50-100 g / m 2 ; the special-shaped section is at least one of triangular section, trilobal section or cross star-shaped section; and the one-way wet guiding, moisture-absorbing and quick-drying non-woven material has a pore structure. The material is soft and does not shed during use, has good air permeability and moisture absorption, the hydrophilicity and hydrophobicity of the two kinds of fibers are different, the special-shaped section and pore groove of the polyamide fiber realize the one-way wet guiding performance, and the moisture can be quickly evaporated to form the moisture-absorbing and quick-drying performance; and the material can be used for quick-paced life short-term outing towels and moisture-absorbing and quick-drying products.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of industrial textiles, and particularly relates to a one-way moisture-conducting and moisture-absorbing quick-drying nonwoven material and a preparation method and application thereof. BACKGROUND

[0002] With the rapid development of society, people travel more and more frequently, which drives the rapid development of the market for products that provide convenience and save time for travel, and the demand increases, such as moisture-absorbing and quick-drying clothing, compressed towels, and hair-drying caps. Among them, moisture-absorbing and quick-drying towels and hair-drying caps are also a type of moisture-absorbing and quick-drying products that have emerged in recent years, and their research is still limited to traditional cotton fiber or viscose fiber fabrics, or synthetic fibers after post-treatment. For example, patent CN202211285275 introduces a moisture-absorbing and quick-drying material composed of porous polyester fibers, bamboo charcoal modified fibers, and silk blended together. The special structure of the porous polyester fibers and the bamboo charcoal modified fibers can endow the fabric with excellent moisture-absorbing and quick-drying properties. Patent CN202210824868 introduces a moisture-absorbing and quick-drying fabric obtained by spinning and weaving ramie fibers after antibacterial treatment. The fabric has good air permeability, strong water absorption capacity, and fast moisture dispersion speed due to the large voids in the structure of the ramie fibers. Li Shufang et al. studied the moisture-absorbing and quick-drying properties of polyester and polyamide fabrics after atmospheric pressure plasma treatment by testing the contact angle and longitudinal wicking height. It was found that the moisture-absorbing and quick-drying properties of the blended fiber fabrics were significantly improved. Zhao Lihuan et al. tested and compared the moisture-absorbing and quick-drying properties, bending length, and linting rate of orange petal-shaped filament nonwoven towels and cotton terry towels. It was found that the moisture-absorbing and quick-drying properties of the orange petal-shaped filament nonwoven towels met the national standard requirements, and the longer the washing time, the softer the fabric, and the smaller the linting rate.

[0003] For the above-mentioned moisture-absorbing and quick-drying fabrics, although they have good water absorption, they have problems such as complex production process, low production efficiency, difficulty in drying after water absorption, large volume, high price, and inability to be used as disposable products. The equipment investment cost of the orange petal-shaped filament nonwoven material is relatively high, which leads to an increase in product cost. Although it can achieve moisture-absorbing and quick-drying properties, it cannot achieve one-way moisture-conducting properties.

[0004] With the improvement of people's health care consciousness and the change of consumption habits, the market demand for disposable hygiene products is showing an increasing trend, especially with the opening of domestic multiple pregnancy policy and the development of world population aging, people's consumption of high-end disposable hygiene products and performance requirements are rapidly increasing. Paper diaper is a convenient sanitary nursing product designed for infants, the elderly, incontinence and paralyzed patients. Since the product needs to contact the skin of the user, it is required to have a certain dryness and liquid absorption capacity. The current paper diaper is generally composed of four layers of surface layer, flow guide layer, absorption core layer and bottom film. The flow guide layer is located between the surface layer and the absorption core layer, which needs to quickly conduct the liquid received by the surface layer to the absorption core layer, keep the surface layer material dry in contact with the skin, and make the liquid absorbed by the absorption core layer not backflow to affect the surface layer material. Some experiments have found that after adding the flow guide layer, the liquid is fully absorbed by the flow guide layer material, and it is not easy to form accumulation on the surface of the paper diaper surface layer, thereby reducing the backflow by nearly half. And because the flow guide layer delays the downward infiltration of the liquid, the core layer can have more time and absorption area to absorb the liquid, thereby effectively preventing the phenomenon of local gel blockage caused by the instantaneous absorption of a large amount of liquid, so the setting of the flow guide layer is very beneficial to the performance improvement of the paper diaper.

[0005] The commonly used flow guide layer at present is made of ES fiber by carding and hot air bonding. Due to the influence of the structure and thickness of the flow guide layer, the ordinary hot air nonwoven flow guide layer has a long liquid permeation time, and after absorbing the liquid, it cannot quickly disperse in the absorption core layer, resulting in low liquid absorption rate of the absorption core layer. Therefore, the improvement of the structure of the flow guide layer is relatively concentrated. For example, Wang Huan et al. prepared a double-layer composite flow guide layer material with a flow guide layer and a damping layer, which used the differential capillary effect of the two fiber webs to prevent liquid backflow; Zheng Lei et al. prepared a multi-layer composite flow guide layer with a wave-shaped cross-section in the transverse direction of the middle layer by hot air penetration bonding technology, and discussed the influence of different fiber densities on the flow guide layer. Although these studies have achieved one-way wetting function and improved the flow guide performance, the product is not prepared in one step online, especially the speed matching of the wave-shaped structure material during the unwinding and conveying process will affect the structure of the product and thus the flow guide performance. Yue Pengfei et al. prepared a flow guide layer material by blending ES fiber and PP fiber, and studied the influence of blending ratio and preparation process on the performance of the flow guide layer. However, the flow guide performance is improved after blending, but the one-way wetting problem cannot be effectively solved, so the dryness problem of the surface layer material cannot be fundamentally solved. Therefore, it is urgent to find a one-step formed one-way wetting and quick-drying nonwoven material and its preparation method. SUMMARY

[0006] The present application aims to solve the technical problems existing in the prior art. To this end, the present application provides a one-way wet guide, moisture absorption and quick-drying non-woven material and its preparation method and application. The prepared one-way wet guide, moisture absorption and quick-drying non-woven material has good air and moisture permeability and one-way wet guide performance, can keep the contact surface with liquid dry, and has moisture absorption and quick-drying. The preparation method has simple production process, high production efficiency and low cost.

[0007] According to a first aspect of the present application, a one-way wet guide, moisture absorption and quick-drying non-woven material is provided, comprising the following mass fraction of raw materials: hydrophilic polyester fiber web 30-70%, profiled section polyamide 6 fiber web 30-70%; the basis weight of the one-way wet guide, moisture absorption and quick-drying non-woven material is 50-100 g / m 2 ; the profiled section is at least one of triangular section, trilobal section or cross star section; the one-way wet guide, moisture absorption and quick-drying non-woven material has a pore structure.

[0008] In some embodiments of the present application, the specification of the hydrophilic polyester is 1.5D*38mm, and the fiber length of the profiled section polyamide 6 is 38mm.

[0009] In some embodiments of the present application, the pore structure of the one-way wet guide, moisture absorption and quick-drying non-woven material contains porous silica wet guide microspheres, the content of the porous silica wet guide microspheres is 5-20%; and / or, the particle size of the porous silica wet guide microspheres is 50-200nm; and / or, the pore size of the porous silica wet guide microspheres is about 15nm.

[0010] According to a second aspect of the present application, a preparation method of the one-way wet guide, moisture absorption and quick-drying non-woven material is provided, comprising the following steps:

[0011] (1) hydrophilic polyester fiber is subjected to circular net water jet to obtain hydrophilic polyester fiber web after water jet; the hydrophilic polyester fiber web after water jet is sent to the lower side of the steel pipe of the flat net water jet area of the steel pipe support;

[0012] (2) profiled section polyamide 6 fiber is sent to the upper side of the steel pipe of the flat net water jet area, and is subjected to composite water jet with the hydrophilic polyester fiber web after water jet prepared in step (1), and is dried to obtain one-way wet guide, moisture absorption and quick-drying non-woven material.

[0013] In some embodiments of the present application, before the hydrophilic polyester fiber is subjected to circular net water jet, it is first subjected to opening mixing, carding and cross-laying treatment. Circular net water jet can save space.

[0014] In some embodiments of the present application, before the profiled section polyamide 6 fiber is sent to the upper side of the steel pipe of the flat net water jet area, it is first subjected to opening mixing and carding treatment.

[0015] The present application adopts the combination of double carding machines and circular and flat net water-jet, one of the carding machines is provided with a net laying device, hydrophilic polyester fiber is opened, mixed, carded into a net, cross-laid to form a web, which is sent to the circular net water-jet area for water-jet entanglement, and then sent to the lower side of the flat net water-jet area with a steel pipe support; the other carding machine is not provided with a net laying device, the parallel fiber web formed by opening, mixing and carding of the profiled cross-section polyamide 6 fiber is sent to the upper side of the flat net water-jet area with a steel pipe support, and is compounded with the cross-laid hydrophilic polyester fiber web after circular net water-jetting. The flat net water-jet area is provided with a series of parallel steel pipes in the width direction according to requirements, and the steel pipes in the water-jet process keep two layers of fiber webs with a pore structure corresponding to the size of the steel pipe in the middle; the two layers of fiber webs are completely entangled together to form one layer of fiber web in the part without the steel pipe, forming a structure-controllable one-way moisture-conducting, moisture-absorbing and quick-drying nonwoven material.

[0016] In some embodiments of the present application, in step (2), when the composite water-jet is performed, the step of delivering porous silica moisture-conducting microspheres into the inside of the one-way moisture-conducting, moisture-absorbing and quick-drying nonwoven material is further included.

[0017] In some embodiments of the present application, the steel pipe support is composed of steel pipes arranged in parallel in the width direction of the fiber web, and the axis of the steel pipe is parallel to the output direction of the fiber web; the porous silica moisture-conducting microspheres are input into the steel pipe of the flat net water-jet area through an input pipe, and then enter the inside of the one-way moisture-conducting, moisture-absorbing and quick-drying nonwoven material from the other end of the steel pipe.

[0018] The one-way moisture-conducting, moisture-absorbing and quick-drying nonwoven material has a structure-controllable three-dimensional network (pore) structure composed of hydrophilic polyester fiber and profiled cross-section polyamide 6 fiber, and porous silica moisture-conducting microspheres can be filled in the pores according to the application and performance requirements of the product. In the water-jet process, the circular net water-jet is used to fix the cross-laid hydrophilic polyester fiber web as a bottom layer, and then the profiled cross-section polyamide 6 fiber web laid in parallel is compounded together, and the porous silica moisture-conducting microspheres are continuously input into the steel pipe in the process of water-jet entanglement, and the steel pipe can prevent the porous silica moisture-conducting microspheres from being damaged by water needle pressure and remaining in the pores of the nonwoven material. The steel pipe directly extends out of the water-jet area, a round roller is used to lightly press the water-jet nonwoven material and the steel pipe to keep the corresponding hole structure and smooth surface of the water-jet nonwoven material at the end of the steel pipe, and then the material is sent to a three-layer flat net drying room device for drying, and finally the edges are cut and wound to form the one-way moisture-conducting, moisture-absorbing and quick-drying water-jet nonwoven material.

[0019] In some embodiments of the present application, in step (1), the basis weight of the hydrophilic polyester fiber web in the circular net water-jet area is 30-50 g / m 2

[0020] In some embodiments of the present application, in step (1), the circular hydroentanglement is performed using four passes of hydroentanglement, with water pressures of 3 MPa, 3 MPa, 5 MPa and 6 MPa, respectively.

[0021] In some embodiments of the present application, in step (2), the flat hydroentanglement is performed using four passes of hydroentanglement, with water pressures of 3 MPa, 6 MPa, 9 MPa and 9-12 MPa, respectively. 2

[0022] In some embodiments of the present application, in step (2), the flat hydroentanglement is performed using four passes of hydroentanglement, with water pressures of 3 MPa, 6 MPa, 9 MPa and 9-12 MPa, respectively.

[0023] The flat hydroentanglement region is provided with a second vacuum water absorption tank, which is a vacuum tank located below the second hydroentanglement head. One end of the vacuum tank is opened and closely attached to the supporting screen, and the side close to the control console is air suctioned, so that negative pressure is generated in the tank body, most of the water on the supporting screen and in the fiber web is absorbed, and the subsequent hydroentanglement is facilitated and the energy consumption during drying is saved.

[0024] In some embodiments of the present application, the flat hydroentanglement region is provided with steel pipes in parallel in the width direction of the fiber web, the axis of the steel pipes is parallel to the output direction of the fiber web, the distance between the steel pipes is 5-15 mm, and the diameter of the steel pipes is 3-5 mm.

[0025] In some embodiments of the present application, in step (2), the drying process is performed in a three-layer flat drying room, the temperature of the lower layer is 100-105℃, the temperature of the middle layer is 108-110℃, and the temperature of the upper layer is 112-118℃. The length of the drying room is 4 meters, and the temperature setting range of the drying room is 100-120℃. Then, the single-direction wet guiding, moisture absorbing and quick-drying nonwoven material is formed by winding.

[0026] In the single-direction wet guiding, moisture absorbing and quick-drying nonwoven material, the hydrophilic polyester fiber is mainly used to improve the hydroentanglement performance of the material and form the water absorption layer of the material; the profiled cross-section polyamide 6 fiber is mainly used to improve the wicking effect of the material and form the hydrophobic layer of the material; the single-direction wet guiding performance is formed by the difference in the hydrophilic and hydrophobic properties of the two layers of fiber webs, and the porous structure and the profiled cross-section fiber are used to realize the moisture absorbing and quick-drying function; the porous silica wet guiding microspheres are used to improve the wet guiding rate of the material and better keep the contact surface dry.

[0027] According to a third aspect of the present application, a non-woven material production device is provided for performing the preparation method according to the second aspect of the present application, comprising, in sequence, an opening device, a carding device, a water jet device, a drying device, a trimming device and a winding device; the water jet device comprises a rotary screen water jet machine and a flat screen water jet machine, and the rotary screen water jet machine is connected to the flat screen water jet machine; the flat screen water jet machine is provided with a steel pipe support composed of steel pipes arranged in parallel in the width direction of the web, and the axis of the steel pipe is parallel to the output direction of the web.

[0028] In some embodiments of the present application, the opening device comprises a first opening machine and a second opening machine, and the carding device comprises a first carding machine and a second carding machine, wherein the first opening machine is connected to the first carding machine, and the second opening machine is connected to the second carding machine.

[0029] In some embodiments of the present application, the first carding machine is connected to the rotary screen water jet machine, and the second carding machine is connected to the flat screen water jet machine; preferably, a cross-lapper is further arranged between the first carding machine and the rotary screen water jet machine, the cross-lapper conveying the web output by the first carding machine to the rotary screen water jet machine, and the web output by the rotary screen water jet machine is below the steel pipe support of the flat screen water jet machine; a lapper is further arranged between the second carding machine and the flat screen water jet machine, the lapper conveying the web output by the second carding machine above the steel pipe support of the flat screen water jet machine.

[0030] According to a preferred embodiment of the present application, at least the following advantages are achieved:

[0031] 1. The present application uses hydrophilic polyester and profiled section polyamide 6 fibers as raw materials, which are carded into water jet non-woven materials with porous structures, respectively. The different hydrophilic and hydrophobic properties of the two layers of webs and the profiled section of the polyamide fibers and the pores and grooves after water jetting realize the one-way moisture transfer performance, and the moisture can be quickly evaporated to form the moisture absorption and quick drying performance.

[0032] 2. The pores of the one-way moisture transfer and moisture absorption and quick drying non-woven material of the present application continuously input the porous silica moisture transfer microspheres in the web fixing process, which can improve the moisture transfer rate; and the addition of porous silica moisture transfer microspheres in the water jet web fixing process can also simplify the functional finishing equipment, and the production speed is not affected by the finishing process, so that the one-way moisture transfer and moisture absorption and quick drying non-woven material is directly formed in one step, and the cost performance of the product is greatly improved.

[0033] 3. The one-way moisture-conducting and moisture-absorbing and quick-drying hydroentangled nonwoven material of the present application is soft and does not shed in use, has good air permeability and moisture absorption, and has one-way moisture-conducting performance due to the different hydrophilic and hydrophobic properties of the two fibers and the special cross-section and pore groove of the polyamide fiber, and can quickly evaporate water to form moisture-absorbing and quick-drying performance; another one-way moisture-conducting and moisture-absorbing and quick-drying hydroentangled nonwoven material is formed by feeding porous silica moisture-conducting microspheres into the pore structure, which has the performance of the previous product and can conduct water faster, and can be used for moisture-absorbing and quick-drying products such as towels for short-term outdoor activities, hair-drying caps, and products such as infant paper diapers, sanitary napkins, and adult diapers that require a moisture-absorbing and quick-drying flow layer to keep the contact surface dry. BRIEF DESCRIPTION OF DRAWINGS

[0034] The present application will be further described below in conjunction with the drawings and examples, in which:

[0035] Figure 1 The cross-sectional schematic diagram of the one-way moisture-conducting and moisture-absorbing and quick-drying nonwoven material prepared in Example 1 of the present application.

[0036] Figure 2 The cross-sectional schematic diagram of the one-way moisture-conducting and moisture-absorbing and quick-drying nonwoven material prepared in Example 2 of the present application.

[0037] Figure 3 The process flow diagram of Example 2 of the present application.

[0038] Figure 4 The schematic diagram of the web being hydroentangled in the circular screen and flat screen hydroentangling area and dried in the three-layer flat screen oven during the preparation of Example 1 of the present application.

[0039] Figure 5 The schematic diagram of the web being hydroentangled in the circular screen and flat screen hydroentangling area and dried in the three-layer flat screen oven during the preparation of Example 2 of the present application.

[0040] Figure 6 The electron microscope image of the trilobal cross-section polyamide 6 fiber.

[0041] Figure 7 The electron microscope image of the hydrophobic layer of the one-way moisture-conducting and moisture-absorbing and quick-drying nonwoven material prepared in Example 1 of the present application.

[0042] Reference signs:

[0043] 100. First opener; 110. Second opener; 120. Fiber conveying curtain; 130. First carding machine; 140. Second carding machine; 150. Laying curtain; 160. Cross-laying machine; 170. Circular screen hydroentangling machine; 180. Flat screen hydroentangling machine; 190. Steel pipe; 200. Circular roller; 210. Three-layer flat screen oven; 220. Edge trimmer; 230. Winder;

[0044] 171. first pre-wetting head; 172. first water jet head; 173. first vacuum water suction tank 181. second pre-wetting head; 182. second water jet head; 183. second vacuum water suction tank;

[0045] 240. cross-laid hydrophilic polyester fiber web; 250. parallel-laid shaped cross-section polyamide 6 fiber web; 260. porous silica moisture conducting microspheres; 270. lower layer web conveying curtain; 280. middle layer web conveying curtain; 290. upper layer web conveying curtain; 300. one-way moisture conducting and absorbing fast-drying nonwoven material. DETAILED DESCRIPTION

[0046] The concept and technical effects of the present application will be described below in combination with examples, so as to fully understand the purpose, features and effects of the present application. Obviously, the described examples are only part of the examples of the present application, but not all examples. Based on the examples of the present application, other examples obtained by those skilled in the art without creative labor are within the scope of protection of the present application. Among them, the hydrophilic polyester fiber and the shaped cross-section polyamide 6 in the examples are from Yizheng Chemical Fibre Co., Ltd.

[0047] Example 1

[0048] A one-way moisture conducting and absorbing fast-drying nonwoven material, comprising the following raw materials by mass fraction: hydrophilic polyester fiber web 64%, shaped cross-section polyamide 6 fiber web 36%; the basis weight of the one-way moisture conducting and absorbing fast-drying nonwoven material is 55g / m 2 ; the shaped cross-section is trilobal cross-section; the one-way moisture conducting and absorbing fast-drying nonwoven material has a pore structure.

[0049] A preparation method of the one-way moisture conducting and absorbing fast-drying nonwoven material as described above, comprising the following steps:

[0050] (1) The hydrophilic polyester fiber is mixed, carded, cross-laid to form a layer of fiber web, sent to the cylinder water jet area, pre-wetted, then water jet entangled through four water jets with water pressures of 3MPa, 3MPa, 5MPa and 6MPa, and then sent to the lower part of the steel pipe of the flat net water jet area with steel pipe support.

[0051] (2) The shaped cross-section polyamide 6 fibers are opened, mixed and carded to form a layer of parallel fiber web, which is sent to the top of the steel pipe support in the flat net water jet area, and after pre-wetting, it is subjected to four water jets and cross fiber web entanglement after circular net water jet area to perform composite water jet entanglement, and the water pressure is 3 MPa, 6 MPa, 9 MPa and 9 MPa respectively. In the steel pipe support part, the water needle rebounds after meeting the steel pipe, and the two layers of fiber web form a pore structure corresponding to the diameter of the steel pipe in the middle, and the two layers of fiber web are tightly entangled into a layer of fiber web in the part without the steel pipe, thus forming a one-way moisture-conducting and moisture-absorbing and quick-drying porous structure non-woven material. The diameter of the steel pipe is 4 mm, and the average arrangement interval is 10 mm.

[0052] (3) A circular roller slightly presses the fiber web before it enters the oven at the outlet end of the steel pipe, which can maintain the pore structure in the fiber web and make the surface of the fiber web flat, and then it is sent to a three-layer flat net drying oven with a length of 4 meters, the temperature of the lower layer is set to 100℃, the temperature of the middle layer is set to 108℃, and the temperature of the upper layer is set to 115℃, and the speed of the drying hot air flow is 2 m / s. Since there is no external force during the hot air drying process, the moisture is carried out from the wet one-way moisture-conducting and moisture-absorbing and quick-drying water jet non-woven material by the hot air, and the shape of the material pore structure does not change, and after cutting and winding, a one-way moisture-conducting and moisture-absorbing and quick-drying water jet non-woven material is formed. The cross section of the one-way moisture-conducting and moisture-absorbing and quick-drying non-woven material is shown in Figure 1 ; the shaped cross-section polyamide 6 fiber is a three-leaf cross-section, and the electron micrograph is shown in Figure 6 ; the electron micrograph of the hydrophobic layer (shaped cross-section polyamide 6 fiber web) is shown in Figure 7 .

[0053] The fiber web is subjected to the circular net, flat net water jet area water jet and three-layer flat net drying process, as shown in Figure 4 , which includes the following steps:

[0054] The cross-laid hydrophilic polyester fiber web 240 is pre-wetted by the first pre-wetting head 171 in the circular net water jet area, and then subjected to water jet entanglement by the four circularly arranged first water jet heads 172, and the water pressure is gradually increased from back to front. Under the suction of the first vacuum water suction box 172, it is conveyed to the bottom of the steel pipe 190 in the flat net water jet machine 180; the shaped cross-section polyamide 6 fiber web 250 is sent to the top of the steel pipe 190 in the flat net water jet machine 180, and after pre-wetting by the second pre-wetting head 181, it is subjected to composite water jet with the hydrophilic polyester fiber web below the steel pipe 190 under the second water jet head 182. The steel pipe 190 extends to the front end of the circular roller 200, and under the light pressure of the circular roller 200 and the flat net curtain, the pore structure and the surface of the non-woven material are maintained, and under the conveying action of the lower layer conveying net curtain 270, the middle layer conveying net curtain 280 and the upper layer conveying net curtain 290, it is dried at 100-120℃ to form a one-way moisture-conducting and moisture-absorbing and quick-drying non-woven material 300, and finally it is cut and wound to form a finished product.

[0055] Example 2

[0056] A one-way wet permeable and quick-drying nonwoven material, comprising the following raw materials by mass fraction: hydrophilic polyester fiber web 58%, profiled cross-section polyamide 6 fiber web 33%; the basis weight of the one-way wet permeable and quick-drying nonwoven material is 60 g / m 2 ; the profiled cross-section is a trilobal cross-section; the one-way wet permeable and quick-drying nonwoven material has a pore structure containing porous silica wet permeable microspheres, the content of the porous silica wet permeable microspheres is 9%, the particle size of the porous silica wet permeable microspheres is 50 nm, and the pore size of the porous silica wet permeable microspheres is 15 nm.

[0057] A preparation method of the one-way wet permeable and quick-drying nonwoven material as described above, comprising the following steps:

[0058] (1) The hydrophilic polyester fiber is opened and mixed, carded into a web, cross-laid to form a layer of web, sent to the circular screen water jet area, pre-wetted, then subjected to four water jets for water jet entanglement, with water pressures of 3 MPa, 3 MPa, 5 MPa, and 6 MPa, respectively, and then sent to the lower side of the steel pipe support of the flat screen water jet area.

[0059] (2) The profiled cross-section polyamide 6 fiber is opened and mixed, carded into a parallel web, sent to the upper side of the steel pipe support of the flat screen water jet area, pre-wetted, and then subjected to four water jets for composite water jet entanglement with the cross-web after the circular screen water jet area, with water pressures of 3 MPa, 6 MPa, 9 MPa, and 9 MPa, respectively. In the steel pipe support part, the water needles rebound after meeting the steel pipe, forming a pore structure corresponding to the diameter of the steel pipe in the middle of the two layers of web, and the two layers of web are tightly entangled into a layer of web in the part without the steel pipe, thus forming a one-way wet permeable and quick-drying pore structure nonwoven material. The diameter of the steel pipe is 4 mm, and the average arrangement interval is 10 mm.

[0060] (3) During the water jet process, the running speed of the web is 60 m / min, and the porous silica wet permeable microspheres are continuously fed into the steel pipe at the same speed. In the water jet area, the wet permeable microspheres are not affected due to the protection of the steel pipe, and after exiting the water jet area, they enter the pore structure of the one-way wet permeable and quick-drying water jet nonwoven material from the outlet end of the steel pipe. There is a circular roller that lightly presses the web before it enters the drying room above the outlet end of the steel pipe, which can maintain the pore structure in the web and make the surface of the web flat.

[0061] (4) The wet state one-way moisture transfer and moisture absorption and quick-drying hydroentangled nonwoven material is sent to a three-layer flat screen drying room with a length of 4 meters, the lower layer temperature is set to 100°C, the middle layer temperature is set to 108°C, and the upper layer temperature is set to 115°C, and the speed of the drying hot air flow is 2 m / s. Since there is no external force during the hot air drying process, the moisture is carried out from the wet state one-way moisture transfer and moisture absorption and quick-drying hydroentangled nonwoven material by the hot air, and the pore structure shape of the material does not change, and after the edge cutting and winding, the one-way moisture transfer and moisture absorption and quick-drying hydroentangled nonwoven material is formed.

[0062] The cross section of the one-way moisture transfer and moisture absorption and quick-drying nonwoven material is shown in Figure 2 .

[0063] A process flow of a one-way moisture transfer and moisture absorption and quick-drying nonwoven material is shown in Figure 3 , including the following steps:

[0064] The first opener 100 opens the mixed hydrophilic polyester fibers, which are fed into the first carding machine 130 through the fiber conveying curtain 120, and then sent to the hydroentangling machine 170 after being laid by the cross-lapper 160 and hydroentangled, and then sent below the steel pipe 190 of the flat screen hydroentangling machine 180; the second opener 110 opens the mixed profiled cross-section polyamide 6 fibers and feeds them into the second carding machine 140, which are transferred to the upper side of the steel pipe 190 of the flat screen hydroentangling machine 180 through the laying curtain 150, and combined with the lower layer web to form a hydroentangled nonwoven material with a pore structure by flat screen hydroentangling. The steel pipe 190 inlet end can continuously send the porous silica moisture transfer microspheres, which are kept in the pore structure and surface flatness under the light pressure of the circular roller 200, to ensure that the porous silica moisture transfer microspheres smoothly enter the pore structure of the hydroentangled nonwoven material from the steel pipe 190 outlet end to form a wet state one-way moisture transfer and moisture absorption and quick-drying hydroentangled nonwoven material, which is then dried at low temperature in the three-layer flat screen drying room 210, cut by the edge cutting machine 220, and wound into a one-way moisture transfer and moisture absorption and quick-drying hydroentangled nonwoven material by the winding machine 230.

[0065] The web is hydroentangled in the circular screen and flat screen hydroentangling area and dried in the three-layer flat screen drying room process, as shown in Figure 5 , including the following steps:

[0066] The cross-laid hydrophilic polyester fiber web 240 is pre-wetted by the first pre-wetting head 171 in the circular net water-jet, and then is water-jet entangled by the four first water-jet heads 172 arranged in a circle, with the water pressure gradually increased from the back to the front. The hydrophilic polyester fiber web is transported to the lower side of the steel pipe 190 in the flat net water-jet machine 180 under the suction of the first vacuum water suction tank 173. The parallel-laid special-shaped cross-section polyamide 6 fiber web 250 is sent to the upper side of the steel pipe 190 in the flat net water-jet machine 180, and is pre-wetted by the second pre-wetting head 181 before being subjected to composite water-jet with the hydrophilic polyester fiber web under the second water-jet head 182. The steel pipe 190 can continuously input porous silica wetting microspheres 260 as needed. The steel pipe 190 extends to the front end of the circular roller 200, and the porosity structure and the flat surface of the non-woven material are maintained under the light pressure of the circular roller 200 and the flat net curtain. The porous silica wetting microspheres 260 are successfully entered into the porosity structure of the non-woven material and are retained before entering the three-layer flat net drying room 210. The non-woven material is dried at 100-120°C under the conveying action of the lower conveying net curtain 270, the middle conveying net curtain 280 and the upper conveying net curtain 290 to form the one-way wetting and moisture absorption quick-drying non-woven material 300. Finally, the edge is cut and wound to form the finished product.

[0067] Example 3

[0068] A one-way wetting and moisture absorption quick-drying non-woven material, comprising the following raw materials by mass fraction: hydrophilic polyester fiber web 55%, special-shaped cross-section polyamide 6 fiber web 45%; the basis weight of the one-way wetting and moisture absorption quick-drying non-woven material is 55g / m 2 ; the special-shaped cross-section is a trilobal cross-section; the one-way wetting and moisture absorption quick-drying non-woven material has a porosity structure.

[0069] A preparation method of the one-way wetting and moisture absorption quick-drying non-woven material as described above, comprising the following steps:

[0070] (1) The hydrophilic polyester fiber is opened and mixed, carded into a web, cross-laid to form a fiber web, and sent to the circular net water-jet area. The fiber web is pre-wetted, and then is subjected to water-jet entanglement by four water-jet heads, with the water pressure being 3MPa, 3MPa, 5MPa and 6MPa respectively. Then the fiber web is sent to the lower side of the steel pipe with a steel pipe support in the flat net water-jet area.

[0071] (2) The shaped cross-section polyamide 6 fibers are opened, mixed, carded and formed into a layer of parallel web, which is sent to the top of the steel pipe support in the flat net water jet area, and after pre-wetting, it is subjected to four water jets and cross-web entanglement after the circular net water jet area for composite water jet entanglement, with water pressures of 3 MPa, 6 MPa, 9 MPa and 12 MPa. In the steel pipe support part, the water needle bounces back after meeting the steel pipe, forming a pore structure corresponding to the diameter of the steel pipe in the middle of the two layers of web, and the two layers of web without the steel pipe are tightly entangled into a layer of web, thus forming a one-way moisture-wicking and moisture-absorbing fast-drying porous structure nonwoven material. The diameter of the steel pipe is 4 mm, and the average arrangement interval is 15 mm.

[0072] (3) A circular roller lightly presses the web before it enters the oven at the outlet end of the steel pipe, which can maintain the pore structure in the web and make the surface of the web flat, and then it is sent to a three-layer flat net drying oven with a length of 4 meters, with the lower layer temperature set to 105°C, the middle layer temperature set to 110°C, and the upper layer temperature set to 118°C. The speed of the drying hot air flow is 2 m / s. Since there is no external force during the hot air drying process, the moisture is carried out from the wet one-way moisture-wicking and moisture-absorbing fast-drying water jet nonwoven material by the hot air, and the shape of the material pore structure does not change, and after cutting and winding, a one-way moisture-wicking and moisture-absorbing fast-drying water jet nonwoven material is formed.

[0073] Example 4

[0074] A one-way moisture-wicking and moisture-absorbing fast-drying nonwoven material, comprising the following raw materials by mass fraction: hydrophilic polyester fiber web 50%, shaped cross-section polyamide 6 fiber web 42%; the basis weight of the one-way moisture-wicking and moisture-absorbing fast-drying nonwoven material is 60 g / m 2 ; the shaped cross-section is a trilobal cross-section; the one-way moisture-wicking and moisture-absorbing fast-drying nonwoven material has a pore structure, the pore structure contains porous silica moisture-wicking microspheres, the content of the porous silica moisture-wicking microspheres is 8%, the particle size of the porous silica moisture-wicking microspheres is 80 nm, and the pore size of the porous silica moisture-wicking microspheres is 15 nm.

[0075] A method for preparing a one-way moisture-wicking and moisture-absorbing fast-drying nonwoven material as described above, comprising the following steps:

[0076] (1) The hydrophilic polyester fibers are opened, mixed, carded and formed into a layer of web, which is sent to the circular net water jet area, pre-wetted, and then subjected to four water jets for water jet entanglement with water pressures of 3 MPa, 3 MPa, 5 MPa and 6 MPa, and then sent to the bottom of the steel pipe in the flat net water jet area with steel pipe support.

[0077] (2) The shaped cross-section polyamide 6 fiber is opened, mixed, carded and formed into a layer of parallel web, and is sent to the top of the steel pipe support of the flat net water jet area, and is pre-wetted, and then is subjected to four water jets and cross-web entanglement after being entangled by the circular net water jet area, and is subjected to composite water jet entanglement, and the water pressure is 3 MPa, 6 MPa, 9 MPa and 12 MPa, respectively, in the steel pipe support part, the water needle bounces back after meeting the steel pipe, and a pore structure corresponding to the diameter of the steel pipe is formed in the middle of the two layers of web, and the two layers of web are tightly entangled into one layer of web in the part without the steel pipe, so that the pore structure of the one-way moisture-conducting and moisture-absorbing and quick-drying nonwoven material is formed; the diameter of the steel pipe is 4 mm, and the average arrangement interval is 15 mm.

[0078] (3) In the water jet process, the running speed of the web is 80 m / min, and the porous silica moisture-conducting microspheres are continuously sent into the steel pipe at the same speed, and in the water jet area, the moisture-conducting microspheres are not affected due to the protection of the steel pipe, and after leaving the water jet area, the moisture-conducting microspheres enter the pore structure of the one-way moisture-conducting and moisture-absorbing and quick-drying water jet nonwoven material from the outlet end of the steel pipe. A circular roller slightly presses the web before entering the drying room above the outlet end of the steel pipe, which can maintain the pore structure in the web and make the surface of the web flat.

[0079] (4) The wet one-way moisture-conducting and moisture-absorbing and quick-drying water jet nonwoven material is sent into a three-layer flat net drying room with a length of 4 meters, the lower layer is set to 105℃, the middle layer is set to 110℃, and the upper layer is set to 118℃, and the speed of the drying hot air flow is 2 m / s. Since there is no external force in the hot air drying process, the water is carried out of the wet one-way moisture-conducting and moisture-absorbing and quick-drying water jet nonwoven material by the hot air, and the pore structure shape of the material does not change, and after cutting and winding, the one-way moisture-conducting and moisture-absorbing and quick-drying water jet nonwoven material is formed.

[0080] Example 5

[0081] A one-way moisture-conducting and moisture-absorbing and quick-drying nonwoven material, comprising the following raw materials by mass fraction: hydrophilic polyester fiber web 50%, shaped cross-section polyamide 6 fiber web 50%; the basis weight of the one-way moisture-conducting and moisture-absorbing and quick-drying nonwoven material is 60 g / m 2 ; the shaped cross-section is a trilobal cross-section; the one-way moisture-conducting and moisture-absorbing and quick-drying nonwoven material has a pore structure.

[0082] A method for preparing the one-way moisture-conducting and moisture-absorbing and quick-drying nonwoven material as described above, comprising the following steps:

[0083] (1) The hydrophilic polyester fiber is opened, mixed, carded and formed into a layer of web, and is sent to the circular net water jet area, is pre-wetted, and then is subjected to four water jets for water jet entanglement, and the water pressure is 3 MPa, 3 MPa, 5 MPa and 6 MPa, respectively, and then is sent to the bottom of the steel pipe support of the flat net water jet area.

[0084] (2) The shaped cross-section polyamide 6 fibers are opened, mixed, carded and formed into a layer of parallel web, which is sent to the top of the steel pipe support in the flat net water jet area, and after pre-wetting, it is subjected to four water jets and cross-web entanglement after the circular net water jet area for composite water jet entanglement, with water pressures of 3 MPa, 6 MPa, 9 MPa and 12 MPa. In the steel pipe support part, the water needle bounces back after meeting the steel pipe, forming a pore structure corresponding to the diameter of the steel pipe in the middle of the two layers of web, and the two layers of web without the steel pipe are tightly entangled into a layer of web, thus forming a one-way moisture-wicking and moisture-absorbing fast-drying porous structure nonwoven material. The diameter of the steel pipe is 4 mm, and the average arrangement interval is 10 mm.

[0085] (3) A circular roller lightly presses the web before it enters the oven at the outlet end of the steel pipe, which can maintain the pore structure in the web and make the surface of the web flat, and then it is sent to a three-layer flat net drying oven with a length of 4 meters, with the lower layer temperature set to 102℃, the middle layer temperature set to 108℃, and the upper layer temperature set to 112℃, and the speed of the drying hot air flow is 3 m / s. Since there is no external force during the hot air drying process, the moisture is carried out from the wet one-way moisture-wicking and moisture-absorbing fast-drying water jet nonwoven material by the hot air, and the shape of the material pore structure does not change, and after cutting and winding, a one-way moisture-wicking and moisture-absorbing fast-drying water jet nonwoven material is formed.

[0086] Example 6

[0087] A one-way moisture-wicking and moisture-absorbing fast-drying nonwoven material, comprising the following raw materials by mass fraction: hydrophilic polyester fiber web 46%, shaped cross-section polyamide 6 fiber web 46%; the basis weight of the one-way moisture-wicking and moisture-absorbing fast-drying nonwoven material is 65 g / m 2 ; the shaped cross-section is a trilobal cross-section; the one-way moisture-wicking and moisture-absorbing fast-drying nonwoven material has a pore structure, the pore structure contains porous silica moisture-wicking microspheres, the content of the porous silica moisture-wicking microspheres is 8%, the particle size of the porous silica moisture-wicking microspheres is 60 nm, and the pore size of the porous silica moisture-wicking microspheres is 15 nm.

[0088] A method for preparing a one-way moisture-wicking and moisture-absorbing fast-drying nonwoven material as described above, comprising the following steps:

[0089] (1) The hydrophilic polyester fibers are opened, mixed, carded and formed into a layer of web, which is sent to the circular net water jet area, pre-wetted, and then subjected to four water jets for water jet entanglement with water pressures of 3 MPa, 3 MPa, 5 MPa and 6 MPa, and then sent to the bottom of the steel pipe support in the flat net water jet area.

[0090] (2) The isometric section polyamide 6 fiber is opened, mixed, carded and formed into a layer of parallel web, and is sent to the top of the steel pipe support of the flat net water jet area, and is pre-wetted, and then is subjected to four water jets and cross web entanglement after the circular net water jet area, and is subjected to composite water jet entanglement, and the water pressure is 3 MPa, 6 MPa, 9 MPa and 12 MPa respectively, in the steel pipe support part, the water needle rebounds after meeting the steel pipe, and a pore structure corresponding to the diameter of the steel pipe is formed in the middle of the two layers of web, and the two layers of web are tightly entangled into one layer of web in the part without the steel pipe, so that the one-way moisture-conducting and moisture-absorbing and fast-drying pore structure nonwoven material is formed; the diameter of the steel pipe is 4 mm, and the average arrangement interval is 10 mm.

[0091] (3) In the water jet process, the running speed of the web is 80 m / min, and the porous silica moisture-conducting microspheres are continuously sent into the steel pipe at the same speed, and in the water jet area, the moisture-conducting microspheres are not affected due to the protection of the steel pipe, and after leaving the water jet area, the moisture-conducting microspheres enter the pore structure of the one-way moisture-conducting and moisture-absorbing and fast-drying water jet nonwoven material from the outlet end of the steel pipe. A circular roller slightly presses the web before entering the drying room above the outlet end of the steel pipe, which can maintain the pore structure in the web and make the surface of the web flat.

[0092] (4) The wet one-way moisture-conducting and moisture-absorbing and fast-drying water jet nonwoven material is sent into a three-layer flat net drying room with a length of 4 meters, the lower layer is set to 102℃, the middle layer is set to 108℃, and the upper layer is set to 112℃, and the speed of the drying hot air flow is 3 m / s. Since there is no external force in the hot air drying process, the moisture is carried out from the wet one-way moisture-conducting and moisture-absorbing and fast-drying water jet nonwoven material by the hot air, and the shape of the material pore structure does not change, and after cutting and winding, the one-way moisture-conducting and moisture-absorbing and fast-drying water jet nonwoven material is formed.

[0093] Test Example

[0094] 1. The products prepared in the above examples are tested for performance, and the moisture absorption and fast-drying performance of the 55g / m 2 The PET / PA composite water jet nonwoven material without a cavity structure is tested as a comparative example, and the basic performance is shown in Table 1.

[0095] Table 1: Basic performance test results of each example

[0096]

[0097] The moisture absorption and fast-drying performance of the sample and the comparative example is tested according to "GB / T21655.1 2008 Textiles - Assessment of the moisture management properties of fabrics - Part 1: Single-Component Test Method", and is shown in Table 2.

[0098] Table 2: Moisture absorption and fast-drying performance test results of each example

[0099]

[0100] From the data in Table 1, Table 2, it can be seen that, under the same quantitative conditions, the thickness, softness and air permeability of the product with the added cavity structure are increased, resulting in improved moisture absorption and quick drying performance. Although the mechanical properties are slightly reduced, they can still meet the use requirements.

[0101] 2. The permeability test results of Examples 2, 4 and 6 with added porous silica moisture-conducting microspheres and the currently commercialized 40g / m 2 ES hot air non-woven flow layer are shown in Table 3.

[0102] Table 3 Permeability test results of examples with added porous silica moisture-conducting microspheres (hydrophobic layer upward)

[0103]

[0104] From the data in Table 3, it can be seen that the permeability of the product with added porous silica moisture-conducting microspheres is better than that of the currently commercialized ES hot air non-woven flow layer, and it can replace the current flow layer to keep the skin contact surface dry.

[0105] The embodiments of the application are described in detail above with reference to the accompanying drawings, but the application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the application. In addition, the embodiments of the application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A one-way wicking moisture-wicking and moisture-drying nonwoven material, characterized by, The raw materials include the following mass fractions: hydrophilic polyester fiber web 30-70%, and shaped cross-section polyamide 6 fiber web 70-30%; the basis weight of the unidirectional wetness guiding, moisture absorbing and quick-drying nonwoven material is 50-100 g / m 2 ; the shaped cross-section is at least one of triangular cross-section, trilobal cross-section or cross star-shaped cross-section; the unidirectional wetness guiding, moisture absorbing and quick-drying nonwoven material has a pore structure, and the pore structure of the unidirectional wetness guiding, moisture absorbing and quick-drying nonwoven material contains porous silica wetness guiding microspheres; The preparation method of the one-way moisture-conducting moisture-absorbing and fast-drying non-woven material comprises the following steps: (1) hydrophilic polyester fibers are subjected to circular net water jetting to obtain hydrophilic polyester fiber web after water jetting; the hydrophilic polyester fiber web after water jetting is sent to the lower side of the steel pipe of the flat net water jetting area of the steel pipe support; (2) the shaped cross-section polyamide 6 fibers are sent to the upper side of the steel pipe of the flat net water jetting area, and are subjected to composite water jetting with the hydrophilic polyester fiber web after water jetting obtained in step (1), and after drying, a one-way moisture-conducting moisture-absorbing and fast-drying non-woven material is obtained. In step (2), when the composite water jetting is performed, the step of delivering porous silica moisture-conducting microspheres into the one-way moisture-conducting moisture-absorbing and fast-drying non-woven material is further included.

2. The oneway wicking, moisture-absorbing, and moisture-drying nonwoven material according to claim 1, characterized in that, The content of the porous silica moisture-conducting microspheres is 5-20%, and / or the particle size of the porous silica moisture-conducting microspheres is 50-200 nm, and / or the pore size of the porous silica moisture-conducting microspheres is about 15 nm.

3. A method of making a one-way wicking moisture-absorbing and moisture-drying nonwoven material according to any one of claims 1-2, characterized in that, The preparation method comprises the following steps: (1) hydrophilic polyester fibers are subjected to circular net water jetting to obtain hydrophilic polyester fiber web after water jetting; the hydrophilic polyester fiber web after water jetting is sent to the lower side of the steel pipe of the flat net water jetting area of the steel pipe support; (2) the shaped cross-section polyamide 6 fibers are sent to the upper side of the steel pipe of the flat net water jetting area, and are subjected to composite water jetting with the hydrophilic polyester fiber web after water jetting obtained in step (1), and after drying, a one-way moisture-conducting moisture-absorbing and fast-drying non-woven material is obtained. In step (2), when the composite water jetting is performed, the step of delivering porous silica moisture-conducting microspheres into the one-way moisture-conducting moisture-absorbing and fast-drying non-woven material is further included.

4. The production method according to claim 3, characterized by, The steel pipe support is composed of steel pipes arranged in parallel in the width direction of the web, and the axis of the steel pipe is parallel to the output direction of the web; the porous silica moisture-conducting microspheres are input into the steel pipe of the flat net water jetting area through an input pipe, and then enter the inside of the one-way moisture-conducting moisture-absorbing and fast-drying non-woven material from the other end of the steel pipe.

5. The preparation method according to claim 3, characterized in that, In step (1), the basis weight of the hydrophilic polyester fiber web in the circular-net hydroentanglement area is 30-50 g / m 2 .

6. The preparation method according to claim 3, characterized in that, In step (2), the basis weight of the shaped cross-section polyamide 6 web in the flat wire hydroentanglement zone is 20-50 g / m 2 .

7. The preparation method according to claim 3, characterized in that, The distance between the steel pipes is 5-15 mm, and the diameter of the steel pipe is 3-5 mm.

8. A nonwoven material production apparatus for carrying out the production method according to any one of claims 3 to 7, characterized in that, The preparation method comprises the following steps:

9. The one-way moisture-conducting moisture-absorbing and fast-drying non-woven material according to any one of claims 1-2 is applied to disposable moisture-absorbing and fast-drying products.

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