CN112252019A - Processing method of sweat-removing cooling fabric and sweat-removing cooling fabric - Google Patents
Processing method of sweat-removing cooling fabric and sweat-removing cooling fabric Download PDFInfo
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- CN112252019A CN112252019A CN202011083998.8A CN202011083998A CN112252019A CN 112252019 A CN112252019 A CN 112252019A CN 202011083998 A CN202011083998 A CN 202011083998A CN 112252019 A CN112252019 A CN 112252019A
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
- D06M23/16—Processes for the non-uniform application of treating agents, e.g. one-sided treatment; Differential treatment
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Abstract
The invention relates to fabric processing and discloses a processing method of a sweat-removing cooling fabric. The invention also discloses the perspiration cooling fabric, and the processing method of the invention is used for processing the single-side surface of the hydrophobic fabric to form a super-hydrophilic structure, so that one surface of the fabric is a hydrophobic surface, and the other surface of the fabric is a hydrophilic surface. The method can form a super-hydrophilic structure on one side of the hydrophobic fabric, so that sweat on the hydrophobic surface of the fabric can quickly permeate into the hydrophilic surface of the fabric and quickly evaporate on the hydrophilic surface of the fabric, and the fabric has a good sweat-discharging and cooling function.
Description
Technical Field
The invention relates to fabric processing, in particular to a processing method of a perspiration and cooling fabric. The invention also relates to the perspiration cooling fabric.
Background
In a hot environment, the body discharges heat mainly by sweating, maintaining the body temperature constant. Clothing generally affects the removal of sweat and heat from the body, and particularly when the amount of sweat is large, the sweat wets the clothing fabric, so that the wet clothing fabric adheres to the skin, causing discomfort.
In order to improve the wearing comfort in the sweating condition, some fabrics with the sweating and cooling functions, such as Janus fabrics with an asymmetric gradient structure, are recently appeared. The Janus fabric has one surface with hydrophobicity and the other surface with hydrophilicity, and can promote sweat to permeate from the hydrophobic surface to the hydrophilic surface. When the sweat-proof garment is worn, the hydrophobic surface faces to the skin of a human body, sweat and heat of the human body can be discharged, the skin can be kept dry, and wearing comfort is improved.
Existing Janus fabrics are often made by electrospinning hydrophobic fibrous materials, such as hydrophobic Polyurethane (PU) nanofiber arrays, onto super-hydrophilic fibrous materials, such as super-hydrophilic gauze. The manufacturing method has complex manufacturing process, and hydrophobic fiber materials, hydrophilic fiber materials or other textile fibers are mixed, so that the hydrophobicity or hydrophilicity of the surface of the fabric is reduced. Still other Janus fabrics have a wettability gradient formed by spraying a hydrophobic or hydrophilic coating onto the surface of the fabric. The Janus fabric manufactured by the manufacturing method has a chemical coating on the surface, has potential influence on the health of human bodies, and influences the stability of coating adhesion after long-time wearing and washing.
Disclosure of Invention
The invention aims to solve the technical problem of providing a processing method of the perspiration cooling fabric, which can form a super-hydrophilic layer on one surface of the hydrophobic fabric, realize the perspiration cooling function of the fabric, and has convenient processing and high stability of the fabric structure.
The invention further aims to solve the technical problem of providing the perspiration cooling fabric which has good perspiration cooling performance, strong structural stability and comfortable wearing.
In order to solve the technical problems, the invention provides a processing method of the sweat-removing cooling fabric, which is characterized in that the single-side surface of the hydrophobic fabric is processed by femtosecond laser to form a super-hydrophilic micro-nano structure.
Preferably, the femtosecond laser processes the single-side surface of the hydrophobic fabric by focusing a laser beam on the single-side surface of the hydrophobic fabric and processing the single-side surface of the hydrophobic fabric by means of laser direct writing. According to the preferable technical scheme, the femtosecond laser directly forms local ablation on the fabric fiber on the surface of the hydrophobic fabric, so that a micro-nano structure is easily formed on the plant fiber, and a super-hydrophilic surface of the fabric is formed.
Preferably, the energy of the femtosecond laser is 2-6 watts, and the processing speed is 1-4 m/s. In the preferred technical scheme, 2-6 watts of femtosecond laser is processed on the surface of the hydrophobic fabric at the processing speed of 1-4 m/s, so that a super-hydrophilic micro-nano structure with a certain depth can be formed on the surface of the hydrophobic fabric, and the femtosecond laser can be prevented from damaging fabric fibers to damage the fabric or reduce the firmness of the fabric.
Preferably, the femtosecond laser is used for processing the surface of the hydrophobic fabric in a path of equally spaced stripes, and the stripe spacing is 5-20 microns. According to the preferable technical scheme, the processing path of the femtosecond laser is simple, the path distance is short, the formed micro-nano structures are uniformly distributed, and uniform super-hydrophilic structures can be formed.
Preferably, the pulse frequency of the femtosecond laser is 1-200KHz, and the duration of a single laser pulse is 250 femtoseconds. According to the preferable technical scheme, the femtosecond laser can form a required micro-nano structure on the surface of the hydrophobic fabric, so that the hydrophilicity of the processed surface is improved. Meanwhile, the femtosecond laser can be prevented from causing the integral damage of the fabric.
Preferably, the femtosecond laser has a wavelength of 1030 nm. In the preferred technical scheme, the laser with the wavelength of 1030nm is an infrared laser, is more suitable for micro-imprinting and is convenient for forming a micro-nano structure.
Preferably, the femtosecond laser processes the surface of the hydrophobic fabric under the control of a computer. Through the preferred technical scheme, under the control of a computer, the positioning of the femtosecond laser and the control of the etching time are more accurate, and the micro-nano structure can be controlled more accurately.
The invention provides a sweat-discharging cooling fabric, which is formed by processing the surface of one side of a hydrophobic fabric through the processing method of the sweat-discharging cooling fabric provided by the first aspect of the invention.
According to the processing method of the perspiring cooling fabric, the femtosecond laser is used for etching the surface of one side of the hydrophobic fabric to form the super-hydrophilic micro-nano structure, so that the processed surface of the hydrophobic fabric forms the super-hydrophilic surface, the non-processed surface of the hydrophobic fabric is still the original hydrophobic surface, and the Janus fabric with the asymmetric gradient structure is formed. When the clothes are made into clothes, the hydrophobic surface of the fabric faces the skin of a human body, so that when the human body sweats, sweat can permeate into the hydrophilic surface through the textile gaps, and the hydrophobic surface of the fabric and the skin of the human body are kept dry. In addition, the super-hydrophilic micro-nano structure of the hydrophilic surface of the fabric can promote the diffusion of sweat on the whole hydrophilic surface, increase the contact area of the sweat and air, improve the evaporation speed of the sweat, keep the fabric dry and take away the heat on the surface of the fabric, and form a cooling effect. The micro-nano structure formed by the method is formed by etching the fabric fiber through femtosecond laser, and the processing is more convenient. According to the perspiration cooling fabric, one surface is a hydrophobic surface of the hydrophobic fabric, and the other surface is a super-hydrophilic surface formed by femtosecond laser processing, so that the permeation speed of sweat from the hydrophobic surface to the hydrophilic surface is high, the dispersion speed of the sweat on the hydrophilic surface is high, the range is wide, the perspiration cooling fabric is more beneficial to the rapid evaporation of the sweat, and the perspiration cooling effect is better. The micro-nano structure formed by femtosecond laser etching has good hydrophilicity, high structural stability, more lasting perspiration and cooling effect and higher wearing comfort.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
FIG. 1 is a scanning electron microscope image of a common fabric fiber;
FIG. 2 is a scanning electron microscope image of a micro-nano structure processed by the method of the invention;
FIG. 3 is a schematic view of a laser direct write machining apparatus used in one embodiment of the method of the present invention;
FIG. 4 is a simulated sweat absorption experimental graph of one embodiment of the sweat releasing cooling fabric of the present invention;
FIG. 5 is an infrared temperature measurement chart of the skin cooling effect formed by one embodiment of the perspiration cooling fabric of the invention.
Description of the reference numerals
1 femtosecond laser and 2 laser beam velocity
3 optical shutter 4 reflector
5 galvanometer 6 fabric
7 fabric table 8 computer
91 skin 92 hydrophobic Fabric
93 Janus fabric region 94 simulated sweat
Detailed Description
In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either directly or indirectly through intervening media, either internally or in any combination thereof. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, and it is to be understood that the detailed description is provided for purposes of illustration and explanation and is not intended to limit the scope of the invention.
In the examples of the present invention, the scanning electron microscope used was the MIRA3 LMU scanning electron microscope produced by TESCAN, czech republic of china, and the infrared thermometer was the Ti450 infrared thermometer produced by Fluke, usa. In an embodiment of the processing method of the perspiration-elimination cooling fabric, a fabric with hydrophobicity is selected, and the fabric fiber on the surface of the fabric is observed by using a scanning electron microscope, as shown in fig. 1, the fabric fiber is a fiber structure with a smooth surface. Processing the single-side surface of the hydrophobic fabric by using femtosecond laser, whitening the processed surface of the fabric after processing, observing the processed surface of the hydrophobic fabric by using a scanning electron microscope, and forming a rough micro-nano structure on the fabric fiber of the processed surface of the hydrophobic fabric as shown in figure 2. The micro-nano structure greatly improves the hydrophilicity of the fabric fiber. The processed surface of the original hydrophobic fabric after processing forms a hydrophilic surface with super hydrophilicity, and the unprocessed surface is still a hydrophobic surface with hydrophobicity of the original hydrophobic fabric, so that the original hydrophobic fabric forms a Janus fabric with one hydrophilic surface and the other hydrophobic surface and an asymmetric hydrophobic gradient structure. According to the method, the surface of one side of the Janus fabric processed and formed by the method is a hydrophilic surface formed by a super-hydrophilic micro-nano structure, the surface of the other side of the Janus fabric is a hydrophobic surface formed by hydrophobic fibers, and wetting gradients are formed on two sides of the fabric, so that sweat on the hydrophobic surface of the fabric can penetrate into the hydrophilic surface of the fabric more and more quickly, the hydrophobic surface of the fabric can be kept dry better, the sweat releasing effect is better, and the wearing comfort is higher. The super-hydrophilic micro-nano structure formed by the method can enable sweat to be rapidly diffused in the micro-nano structure, the diffusion range is wider, the contact area of the sweat and outside air is increased, the evaporation speed of the sweat is improved, the dryness of the hydrophobic surface of the fabric can be kept, more heat is taken away due to the evaporation of the sweat, and the cooling function of the fabric is improved. Compared with the existing method for spraying the hydrophobic coating or the hydrophilic coating on the surface of the fabric to form the Janus fabric, the method avoids stimulation of the chemical coating to a human body, avoids falling of the coating and has higher stability of the Janus fabric. Compared with the existing method for blending the hydrophobic fiber material and the hydrophilic fiber material, the method has better wettability gradient and simpler preparation method. The micro-nano structure obtained by the method has stronger hydrophilicity and better perspiration and cooling effects of the fabric.
In some embodiments of the method for processing the perspiration-reducing fabric, a specific method for processing the single-side surface of the hydrophobic fabric by using the femtosecond laser is to focus the laser beam on the single-side surface of the hydrophobic fabric, the high-energy femtosecond laser beam forms an instant ablation effect on the surface of the hydrophobic fabric, a rough micro-nano structure is processed on the fabric fiber, the contact area between the surface of the fabric fiber and liquid is increased, the liquid wettability of the fabric fiber is improved, and a surface with super-hydrophilic wettability is formed on the processing surface of the hydrophobic fabric. And etching the surface of one side of the hydrophobic fabric in a laser direct writing mode by controlling the relative movement between the laser and the hydrophobic fabric to form the super-hydrophilic micro-nano structure distributed on the processing surface of the hydrophobic fabric.
As an embodiment of the processing method of the perspiration-elimination cooling fabric, the energy of the femtosecond laser used for processing the hydrophobic fabric is 2-6 watts, and the moving speed of the laser beam on the surface of the hydrophobic fabric is 1-4 m/s. The size and the form of the micro-nano structure can be regulated and controlled by controlling the energy size and the scanning speed of the femtosecond laser, so that the surface wettability is optimized.
In some embodiments of the processing method of the perspiration-elimination cooling fabric, the femtosecond laser etches the surface of the hydrophobic fabric line by line in the path of equidistant stripes on the surface of the hydrophobic fabric, the distance between adjacent stripes is 5-20 micrometers, and a micro-nano structure extending over the surface of the fabric is formed. The micro-nano structure formed on the surface of the fabric is distributed more uniformly by processing the fabric in the path of the equidistant stripes, and the moving distance of the laser beam is smaller. The stripe interval of 5-20 microns can ensure that the formed micro-nano structure is spread over the surface of the whole fabric, and the micro-nano structure prepared by the scanning path of the micron-scale stripe is more complex, so that the surface roughness is increased, and the wettability of the surface of the fabric is improved.
As a specific implementation mode of the processing method of the perspiration-elimination cooling fabric, the pulse frequency of the femtosecond laser used for processing is 1-200KHz, and the pulse width is 250 femtoseconds. The pulse frequency and the pulse width of the femtosecond laser can influence the structural characteristics of the formed micro-nano structure, the micro-nano structure in a specific form can be formed on the surface of the fabric by controlling the pulse frequency and the pulse width of the femtosecond laser, and the hydrophilicity of the processed surface of the fabric is improved. And ensures the stability of the fabric structure.
In some embodiments of the method for processing a perspiration-reducing fabric according to the invention, the wavelength of the femtosecond laser used for processing the hydrophobic fabric is 1030 nm. Specifically, the laser used was a Pharos femtosecond laser produced by Lithowa Light Conversion.
According to the processing method of the sweat-removing cooling fabric, the emission frequency, the pulse width and the emission power of the laser beam emitted by the femtosecond laser and the moving speed, the moving path and the like of the laser beam on the surface of the fabric are controlled through a computer, so that the appearance of a micro-nano structure processed and formed on the surface of the hydrophobic fabric is controlled.
A femtosecond laser processing system used in the method for processing the perspiration-elimination cooling fabric of the present invention is shown in fig. 3, and comprises a femtosecond laser 1, an optical shutter 3, a reflecting mirror 4, a vibrating mirror 5, a fabric table 7 and a computer 8. The laser beam 2 generated by the femtosecond laser 1 is directed to the mirror 4 via the shutter 3, which shutter 3 can intercept the laser beam 2 if necessary. The laser beam 2 enters the vibrating mirror 5 after being reflected by the reflecting mirror 4, is focused by the vibrating mirror 5 and then is emitted to the fabric table 7, and the fabric 6 fixed on the fabric table 7 is etched. The galvanometer 5 is connected with a computer 8, and the reflecting angle can be changed under the control of the computer 8, so that the laser beam focused by the galvanometer 5 moves on the fabric 6 according to a set path to form a processing path on the surface of the fabric 6.
The embodiment of the perspiration-elimination cooling fabric is processed on the surface of one side of a hydrophobic fabric through any embodiment of the processing method of the perspiration-elimination cooling fabric. The surface of the unprocessed side of the sweat-discharging cooling fabric is hydrophobic, and the processed surface of the side forms a complex micro-nano structure after being processed by femtosecond laser, so that the fabric is hydrophilic, and a Janus fabric with asymmetric hydrophobic gradient structures at two sides is formed, so that sweat can be promoted to transfer from a hydrophobic surface to a hydrophilic surface, and the drying of the hydrophobic surface can be kept. In addition, sweat is easy to diffuse in the micro-nano structure, a larger evaporation area is formed, evaporation of the sweat is promoted, and a cooling effect is achieved.
In some embodiments of the perspiration-eliminating and cooling fabric, the micro-nano structure of the hydrophilic surface of the hydrophobic fabric has a thickness of 5-10% of the total thickness of the fabric. 5-10% of the depth of the micro-nano structure can well absorb sweat permeating from the hydrophobic surface, a drying layer is formed on the hydrophobic surface, and the wearing comfort is improved. Moreover, the diffusion of sweat in the micro-nano structure can be facilitated, a thin sweat layer is formed, and the evaporation of the sweat is facilitated. It should be noted that, since the fabric is woven by the fabric fibers, and the surface of the fabric is not a smooth plane, the fabric does not have a fixed thickness in a microscopic view, and therefore, the thickness in this embodiment refers to the total thickness between the two side surfaces of the fabric, and the thickness of the micro-nano structure also refers to the thickness of the micro-nano structure on the fabric surface fibers.
In order to verify the perspiration cooling performance of the perspiration cooling fabric, a piece of hydrophobic fabric 92 is selected, a super-hydrophilic surface with a micro-nano structure is formed in a local area of the surface of one side of the hydrophobic fabric 92 by the processing method of the perspiration cooling fabric, a Janus fabric area 93 with two surfaces having different wettability is formed on the side which is not processed, and the Janus fabric in the Janus fabric area 93 is the perspiration cooling fabric. Two drops of simulated sweat 94 are dropped adjacent to skin 91, as shown in section a of figure 4. The non-finished side (hydrophobic side) of the hydrophobic fabric 92 with the local Janus fabric area 93 processed as described above is faced towards the skin 91 and overlaid on simulated sweat such that one drop 94 of simulated sweat is within the Janus fabric area 93 and another drop of simulated sweat is within the area of the unprocessed hydrophobic fabric 92, as shown in part b of fig. 4. As shown in part c of fig. 4, simulated sweat 94 within the range of Janus fabric region 93 quickly permeates the fabric, penetrates to the outer hydrophilic side, and rapidly diffuses at the hydrophilic side; whereas simulated sweat penetration is slower in the area of the raw hydrophobic fabric 92, it is difficult to see traces of simulated sweat 94 on the outside of the hydrophobic fabric 92. Lifting the hydrophobic fabric 92, as shown in part d of fig. 4, and simulated perspiration within the Janus fabric region 93 has been removed, the skin 91 in the region remains dry; while simulated sweat 94 in the area of raw hydrophobic fabric 92 remains between skin 91 and the hydrophobic fabric 92, skin 91 is in a wet-viscous state upon wetting of simulated sweat 94. The sweat-removing cooling fabric has remarkable sweat-removing effect, can keep the skin dry and improves the wearing comfort. The skin 91 on which the simulated sweat 94 was dropped was covered with the hydrophobic fabric 92 having the local Janus fabric region 93 processed as described above, and the temperature of the skin surface was measured with an infrared thermometer, as shown in fig. 4, the temperature in the range of the Janus fabric region 93 was always lower by about 2 ℃ than the temperature in the range of the unprocessed hydrophobic fabric 92. The sweat-discharging cooling fabric has obvious cooling effect.
In the description herein, references to the description of "one embodiment," "some embodiments," "an implementation," etc., mean that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations thereof do not necessarily have to be directed to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the specific features in any suitable way, and the invention will not be further described in relation to the various possible combinations in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.
Claims (8)
1. A processing method of a perspiration-eliminating cooling fabric is characterized in that a femtosecond laser is used for processing the single-side surface of a hydrophobic fabric to form a super-hydrophilic micro-nano structure.
2. The method for processing the perspiring cooling fabric according to claim 1, wherein the femtosecond laser is used for processing the single-side surface of the hydrophobic fabric by focusing a laser beam on the single-side surface of the hydrophobic fabric and processing the single-side surface of the hydrophobic fabric in a laser direct writing mode.
3. The method of processing a perspiring cooling fabric according to claim 1, wherein the femtosecond laser has an energy of 2-6 watts and a processing speed of 1-4 m/s.
4. The method of processing a perspiring cooling fabric according to claim 1, wherein the femtosecond laser is processed on the surface of the hydrophobic fabric in a path of equally spaced stripes, the stripe spacing being 5-20 microns.
5. The method of manufacturing a perspiring cooling fabric according to any of claims 1 to 4, wherein the femtosecond laser has a pulse frequency of 1-200KHz and a pulse width of 250 femtoseconds.
6. The method of manufacturing a perspiring cooling fabric according to any one of claims 1 to 4, wherein the femtosecond laser has a wavelength of 1030 nm.
7. The method of processing a perspiring cooling fabric according to any one of claims 1 to 4, wherein the femtosecond laser processes the surface of the hydrophobic fabric under the control of a computer.
8. A perspiring cooling fabric, characterized in that, the processing method of the perspiring cooling fabric according to any one of claims 1 to 7 is used for processing the single side surface of the hydrophobic fabric.
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| CN202011083998.8A CN112252019B (en) | 2020-10-12 | 2020-10-12 | Processing method of sweat-removing cooling fabric and sweat-removing cooling fabric |
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