Textile fabric based on fluid mechanics

Abstract

The present invention relates to a textile fabric based on fluid mechanics, comprising a fabric main body and a ventilation passage, in which the cross-sectional area S1 of an opening on the surface side of the ventilation passage and the cross-sectional area S2 of an opening on the back side of the ventilation passage have a relationship that S1 is not equal to S2, such that the flow velocity v of gas passing through the textile fabric is changed. The ventilation passages are arranged on the fabric body, so that the speed of fluid penetrating through the fabric can be changed; the air permeability and the perspiration property of the fabric are improved, the air permeability of the fabric is reduced, and the warm-keeping effect is achieved; the diameters of the two ends of the ventilation channel are different, and a funnel effect in fluid dynamics can be generated, so that the speed is increased when airflow passes through the fabric; therefore, the acceleration of the airflow speed can drive sweat on the skin surface to evaporate quickly, the heat dissipation effect is improved, and a wearer feels cool; when the airflow passes through one end, with a smaller opening, of the pore channel, the speed is slowed down; the temperature change speed inside and outside the clothes is reduced, and the warm-keeping effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of textiles, and particularly to a textile fabric based on fluid mechanics. Background Art

[0002] With the improvement of people's living standards, the requirements for the comfort and functionality of clothing are also getting higher and higher. However, the current common clothing fabrics have poor air permeability and sweat wicking performance in high-temperature environments, and cannot meet consumers' pursuit of coolness and comfort.

[0003] The existing designs for improving the air permeability of fabrics mainly adopt the following technical means: one is to use fibers with good air penetration performance, such as tencel, bamboo fiber, etc., but the prices of these fibers are expensive, which limits the scope of application; the second is to form micropores on the fabric by mechanical and chemical methods, but this will reduce the strength of the fabric; the third is to use jacquard weaving methods or hollow weaving methods, but this will increase the complexity of the production process; the research and development of high-air-permeability cool-sensation fabrics currently also faces the following technical problems: how to effectively improve the air permeability on the premise of ensuring the strength of the fabric; how to simplify the production process, reduce production costs and improve efficiency; how to make the parameters of the air permeability of the fabric designable and controllable; how to find a material selection scheme that takes into account both cost and performance.

[0004] In view of this, the present invention is specifically proposed. Summary of the Invention

[0005] In order to solve the above technical defects existing in the prior art, the present invention provides a textile fabric based on fluid mechanics, which can effectively solve the problems in the background art.

[0006] In order to solve the above technical problems, the technical solution provided by the present invention is specifically as follows:

[0007] The embodiment of the present invention discloses a textile fabric based on the funnel effect of fluid mechanics. The textile fabric is composed of a fabric main body and a ventilation passage. The relationship between the cross-sectional area S1 of the opening on the surface side of the ventilation passage and the cross-sectional area S2 of the opening on the inner side is S1≠S2, so as to change the flow velocity v of the gas passing through the textile fabric;

[0008] Wherein, if the gas passes from the side with a larger cross-sectional area of the ventilation passage to the side with a smaller cross-sectional area, the relationship between the flow velocity v2 of the passing gas and the flow velocity v1 of the same passage with the same cross-sectional area on both sides based on the side with a smaller area is v1<v2. If the gas passes from the side with a smaller cross-sectional area of the ventilation passage to the side with a larger area, the relationship between the flow velocity v2 of the passing gas and the flow velocity v1 of the same passage with the same cross-sectional area on both sides based on the side with a smaller area is 0<v2≤v1.

[0009] In any of the above solutions, it is preferred that, when applied to clothing fabrics, the side with a larger cross-sectional area of ​​the ventilation passage is used as the outer side of the clothing fabrics.

[0010] In any of the above solutions, it is preferred that, when applied to curtain fabrics, the side of the curtain fabrics with a larger cross-sectional area of ​​the ventilation passage is the side of the curtain fabrics closer to the outdoors.

[0011] In any of the above schemes, it is preferred that the textile fabric is a woven fabric, a knitted fabric or a non-woven fabric, and the main body yarn is one or more of cotton, linen, silk, wool, polyester, nylon, acrylic, vinylon, polypropylene, spandex, acetate fiber, aramid, and carbon fiber. If the main body yarn is a long fiber, the yarn thickness is 1D~300D and the number of monofilaments is 1~300. If the main body yarn is a short fiber, the fineness converted to denier D is 1D~300D.

[0012] In any of the above embodiments, it is preferred that the thickness measured by JIS L 1096.4A method is 10 mm or less, and the weight per unit area measured by JIS L 1096.3A method is 10 to 500 g / m 2 The cross-sectional area S of the ventilation passage (including S1 and S2) is 0<S<1cm 2 .

[0013] In any of the above embodiments, it is preferred that the air permeability measured by JIS L1096.26A method is 500 cm 3 / (cm 2 s) or below.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention can form the function of ventilation and perspiration by arranging ventilation passages on the fabric body, thereby improving the air permeability and perspiration of the fabric; the different diameters at the two ends of the ventilation passages can produce a "funnel effect" in fluid dynamics, so that the speed of air flow is accelerated when passing through the fabric; thereby, the accelerated air flow speed can drive the rapid evaporation of sweat on the skin surface, thereby improving the heat dissipation effect and making the wearer feel cool; the ventilation passages are woven integrally with the fabric body, the manufacturing process is simple, and no subsequent drilling or other processing is required, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used for further understanding of the present invention and are used to explain the present invention together with the embodiments of the present invention, but do not constitute a limitation of the present invention.

[0017] Figure 1 is a side cross-sectional view of the textile fabric based on fluid mechanics of the present invention;

[0018] Figure 2is a top view of the textile fabric based on fluid mechanics of the present invention;

[0019] Figure 3 is a bottom view of the textile fabric based on fluid mechanics of the present invention;

[0020] Figure 4 It is a physical surface diagram of the developed fabric of the textile fabric based on fluid mechanics of the present invention;

[0021] Figure 5 is a scanning electron microscope surface image of the ventilation passages of the fabric of the fluid dynamics-based textile fabric of the present invention;

[0022] Figure 6 is a scanning electron microscope longitudinal cross-sectional view of a ventilation passage of a textile fabric based on fluid mechanics of the present invention;

[0023] Figure 7 The invention relates to a trial T-shirt in which the textile fabric based on fluid mechanics of the present invention is used on the chest of the T-shirt.

[0024] Description of the numbers in the figure:

[0025] 1. Fabric body; 2. Ventilation passage. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0028] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] In order to better understand the above technical solution, the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] Embodiment 1:

[0032] like Figures 1 to 7 As shown, the present invention provides a textile fabric based on fluid mechanics, including a fabric body 1, on which a ventilation passage 2 is arranged, wherein the diameter of one end of the ventilation passage 2 is larger than the diameter of the other end of the ventilation passage 2, and the ventilation passage 2 is woven integrally with the fabric body 1.

[0033] In the textile fabric based on fluid mechanics described in the embodiment of the present invention, by arranging a ventilation passage on the fabric body 1, a ventilation and perspiration function can be formed, thereby improving the air permeability and perspiration of the fabric; the different diameters at both ends of the ventilation passage can produce a "funnel effect" in fluid dynamics, so that the speed of air flow through the fabric is accelerated; thereby, the acceleration of the air flow speed can drive the rapid evaporation of sweat on the skin surface, thereby improving the heat dissipation effect and making the wearer feel cool; the ventilation passage and the fabric body are woven as one, the manufacturing process is simple, and no subsequent drilling or other processing is required, thereby reducing costs.

[0034] In this embodiment, preferably, the ratio of the diameters of the two ends of the ventilation passage 2 of the fabric is 1:3, and the end with the larger diameter is located on the outer surface of the fabric body 1.

[0035] In this embodiment, preferably, the diameter of the warp yarn decreases from the air inlet end to the air outlet end of the ventilation passage 2, and the change rate of the diameter of the warp yarn matches the change rate of the cross-sectional area of ​​the ventilation passage 2 to achieve a gradual increase in the speed of the fluid when passing through the ventilation passage 2.

[0036] In the textile fabric based on fluid mechanics described in the embodiment of the present invention, on the basis of the warp knitted mesh fabric, yarns of different thicknesses are arranged regularly to produce a funnel-shaped pore structure on the surface of the fabric, such as Figure 2As shown in the figure, the white circles represent the holes of the mesh fabric, and the thickness of the yarns around them increases successively, so that their cross-section forms an inverted triangle-shaped slope, and finally a funnel-shaped hole is formed on the surface of the fabric. The warp yarn diameter gradually decreases along the ventilation passage, and the "funnel effect" in fluid dynamics can be used to increase the speed of the fluid when passing through the ventilation passage; the warp yarn diameter change rate matches the ventilation passage cross-sectional area change rate to ensure that the funnel effect is maximized and the airflow acceleration effect is optimal; airflow acceleration can drive the skin sweat to evaporate quickly, improve the heat dissipation effect, and make the wearer feel cool; the design of gradually decreasing warp yarn diameter enhances the air permeability and perspiration performance of the fabric; the use of warp yarns of different thicknesses can freely design and control the changes in warp yarn diameter, and broaden the application range of the fabric.

[0037] In this embodiment, preferably, the fabric body 1 is composed of yarn, and the diameter of the yarn decreases from the edge of the hole at the air inlet end of the ventilation passage 2 to the center of the hole, and the diameter change rate of the yarn matches the cross-sectional area change rate of the ventilation passage 2 to achieve a gradual increase in the speed of the fluid when passing through the ventilation passage 2.

[0038] In the textile fabric based on fluid mechanics described in the embodiment of the present invention, two or more polyester DTY yarns are used as warp yarns, and DTY yarns of different specifications can be used to achieve a gradual change in the warp yarn diameter; the preset arrangement order of the DTY yarns can accurately control the change in the warp yarn diameter; the use of DTY yarns as warp yarns can give the fabric a certain strength performance; and the polyester DTY yarn has the characteristics of good morphological stability and strong elastic resilience, which can increase the service life of the fabric; the preset yarn arrangement order realizes the effective connection between design and production.

[0039] In this embodiment, preferably, the yarn includes at least two thickness specifications, and the polyester DTY yarn has a preset arrangement order, wherein the thickness of the yarn is 50D, 100D, 150D, and the monofilament F number is 72.

[0040] In the textile fabric based on fluid mechanics described in the embodiment of the present invention, polyester yarns of the same specifications are used as weft yarns, so that the weft yarn diameter can be kept constant; the constant weft yarn diameter can fully cooperate with the gradual change of the warp yarn diameter; the use of polyester yarn as weft yarn can give the fabric certain strength performance; polyester yarn has the characteristic of good morphological stability; the use of yarns of the same specifications for weft yarns is conducive to stabilizing the gradual change of the warp yarn diameter.

[0041] In this embodiment, it is preferred that the yarn material is one or more of cotton, linen, silk, wool, polyester, nylon, acrylic, rayon, polypropylene, spandex, acetate, aramid, and carbon fiber, and the yarns of at least two materials are mixed and arranged to match the diameter of the warp yarn along the edge of the hole at the air inlet end of the ventilation passage 2 to the center of the hole.

[0042] In this embodiment, preferably, the fabric body 1 is a woven fabric, a knitted fabric or a non-woven fabric.

[0043] In this embodiment, preferably, the thickness of the fabric body 1 is 0.5 mm.

[0044] In this embodiment, preferably, the preparation of the fabric body 1 includes: refining, low-temperature liquid flow, dyeing and shaping.

[0045] In this embodiment, preferably, the refining temperature is 98°C.

[0046] In the textile fabric based on fluid mechanics described in the embodiment of the present invention, the finishing process of refining, low-temperature liquid flow, dyeing and shaping can improve the appearance and performance of the fabric; the refining temperature of 98°C can remove the stress in the fabric, making the fabric smooth and non-shrinking; the low-temperature liquid flow can make the surface effect of the fabric soft and full, and increase the fullness and elasticity of the fabric; dyeing can increase the appearance of the fabric and enrich the design and application of the fabric; shaping can make the shape and size of the fabric stable and extend the service life, which is conducive to improving its appearance and comfort while ensuring the function of the fabric.

[0047] It can be seen that warp knitted fabrics with different coarse and fine yarns arranged in a regular sequence have the effect of accelerating the wind speed, providing new ideas and technical means for the design and production of highly breathable and cool summer clothing fabrics, improving the comfort, functionality and added value of the fabrics, and broadening the application range of the fabrics.

[0048] The warp knitting is used for weaving. The selected yarns are PET DTY SD 50D / 72F and PET DTY SD 100D / 48F, with density of WPI:28 and CPI:28; the organization is:

[0049] Guide bar 1: Yarn PET DTY SD 50D / 72F structure 67 / 54 / 32 / 10 / 23 / 45 1i n1out 2i n 1out1i n 2out

[0050] Guide bar 2: Yarn PET DTY SD 50D / 72F structure 10 / 23 / 45 / 67 / 54 / 32 1i n 1out2i n 1out1i n 2out

[0051] Guide bar 3: Yarn PET DTY SD 100D / 48F structure 78 / 65 / 43 / 21 / 34 / 56 4i n4out

[0052] Guide bar 4: Yarn PET DTY SD 100D / 48F structure 21 / 34 / 56 / 78 / 65 / 43 4i n4out

[0053] The fabric obtained after weaving is as follows Figure 1 , the ventilation path of the fabric under the scanning electron microscope Figure 2 (fabric surface) and Figure 3 (Fabric section) as shown.

[0054] The experiment of changing the wind speed through the mesh fabric (comparison product) with the same air permeability was compared. With the airflow of 0.5m / s vertically to the fabric surface, the wind speed through the comparison mesh fabric was 0.27m / s, and the wind speed through the funnel structure fabric of the development product was 0.39m / s, which is 1.4 times that of the comparison mesh fabric.

[0055] When the fabric is turned inside out, and a 0.5m / s airflow is directed vertically into the fabric, the wind speed through the mesh fabric (comparison product) with the same air permeability is 0.45m / s, and the wind speed through the funnel structure fabric of the developed product is 0.15m / s, which is one-third of the speed of the mesh fabric of the comparison product. This shows that when the wind blows in from the end with a smaller opening and blows out from the end with a larger opening, the wind speed will be reduced, and it can be used as a warm fabric.

[0056] Embodiment 2:

[0057] like Figure 6 As shown, the yarns of different thicknesses in the above Example 1 are changed to the same PET DTY SD 100D / 48F, with a density of WPI: 28 and CPI: 28; the organization is:

[0058] Bar 1: Yarn PET DTY SD 100D / 48F structure 67 / 54 / 32 / 10 / 23 / 45 6i n 2out Bar 2: Yarn PET DTY SD 100D / 48F structure 10 / 23 / 45 / 67 / 54 / 32 6i n 2out A warp knitted fabric with the same structure but the same yarn thickness as in Example 1 was obtained. An airflow at a speed of 0.5 m / s was perpendicular to the surface of the fabric, and the wind speed through the fabric was 0.28 m / s, which was consistent with the speed of other mesh fabrics with the same air permeability.

[0059] It can be seen from this that warp knitted fabrics arranged with yarns of the same thickness do not have the effect of changing the wind speed.

[0060] Embodiment 3:

[0061] The fabric woven in Example 1 is set on the chest position of the T-shirt, and the rest of the T-shirt is made of ordinary knitted fabric such as Figure 7The T-shirts shown in the figure were used by three male subjects to jog at a speed of 7 km / h in an environment of 30°C, while airflow of 7 km / h was provided from the front. They ran for 20 minutes, during which the temperature inside the clothes at the chest position of the subjects was tested. As a comparison, a mesh fabric with the same air permeability as the fabric woven in Example 1 was set at the same position of the T-shirt, and the same subjects performed the same test. In comparison, the results of the three subjects all showed that the temperature inside the clothes of the T-shirts using the fabric woven in Example 1 was lower, and the average temperature difference among the three subjects was 2.2°C.

[0062] Compared with the prior art, the present invention provides the following beneficial effects:

[0063] The present invention can form the function of ventilation and perspiration by arranging ventilation passages on the fabric body, thereby improving the air permeability and perspiration of the fabric; the different diameters at the two ends of the ventilation passages can produce a "funnel effect" in fluid dynamics, so that the speed of air flow is accelerated when passing through the fabric; thereby, the accelerated air flow speed can drive the rapid evaporation of sweat on the skin surface, thereby improving the heat dissipation effect and making the wearer feel cool; the ventilation passages are woven integrally with the fabric body, the manufacturing process is simple, and no subsequent drilling or other processing is required, thereby reducing costs.

[0064] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A textile fabric based on the funnel effect of fluid mechanics, characterized in that: The textile fabric is composed of a fabric body (1) and ventilation passages (2). The relationship between the cross-sectional area S1 of the opening on the surface side and the cross-sectional area S2 of the opening on the inner side of the ventilation passages (2) is S1≠S2, so as to change the flow velocity v of the gas passing through the textile fabric; Among them, if the gas passes from the side with a larger cross-sectional area of the ventilation passages (2) to the side with a smaller cross-sectional area, the relationship between the flow velocity v2 of the passing gas and the flow velocity v1 of the same passage with the same cross-sectional area on both sides based on the side with the smaller area is v1<v2. If the gas passes from the side with a smaller cross-sectional area of the ventilation passages (2) to the larger side, the relationship between the flow velocity v2 of the passing gas and the flow velocity v1 of the same passage with the same cross-sectional area on both sides based on the side with the smaller area is 0<v2≤v1.

2. A textile fabric based on the fluid mechanics funnel effect according to claim 1, characterized in that: When applied to clothing fabrics, the side with a larger cross-sectional area of the ventilation passages (2) is used as the outer side of the clothing fabric.

3. The textile fabric based on the fluid mechanics funnel effect according to claim 1, characterized in that: When applied to curtain fabrics, the side with a larger cross-sectional area of the ventilation passages (2) is the side of the curtain fabric closer to the outside.

4. A textile fabric based on the fluid mechanics funnel effect according to any one of claims 1 to 3, characterized in that: The textile fabric is a woven fabric, a knitted fabric or a non-woven fabric. The yarn of the main body (1) is one or more of cotton, hemp, silk, wool, polyester, nylon, acrylic, vinylon, polypropylene, spandex, acetate fiber, aramid fiber, carbon fiber. If the yarn of the main body (1) is a long fiber, the yarn thickness is 1D to 300D and the number of filaments is 1 to 300. If the yarn of the main body (1) is a short fiber, the fineness is converted to 1D to 300D in terms of denier D.

5. The textile fabric based on the fluid mechanics funnel effect according to claim 4, characterized in that: The thickness measured by JIS L 1096.4A method is 10 mm or less, and the weight per unit area measured by JIS L 1096.3A method is 10 to 500 g / m 2 The cross-sectional area S (including S1 and S2) of the ventilation passage (2) is 0<S<1cm 2 .

6. The textile fabric based on the fluid mechanics funnel effect according to claim 5, characterized in that: Air permeability measured by JIS L1096.26A method is 500 cm 3 / (cm 2 s) or below.

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