Anti-transparent fabric, white yoga pants and white sports chest circumference

Abstract

The invention provides an anti-transparent fabric, white yoga pants and a white sports chest circumference. According to the anti-transparent fabric, the thickness of the anti-transparent fabric is 0.4-1.2 mm, raw materials of the anti-transparent fabric comprise nylon, spandex and titanium dioxide particles, the weaving density WPI of the anti-transparent fabric is 55-75, the weaving density CPI of the anti-transparent fabric is 60-90, the front face of the anti-transparent fabric is white, and the back face of the anti-transparent fabric is target gray. The verification method of the target gray comprises the following steps: inputting a reflectivity value of standard gray into an optical analyzer, setting the color as a standard color, scanning a measured color to be verified, then outputting a CMC DE value, and judging that the measured color is the target gray when the CMC DE value is within a range of + / -22. The anti-transparent fabric, the white yoga trousers and the white sports chest band have the good anti-transparent effect and the front white effect.

Description

Technical Field

[0001] The invention belongs to the technical field of clothing preparation, and particularly relates to an anti-seepage fabric, white yoga pants and a white sports bra. Background Art

[0002] White fabric is widely used in the clothing industry due to its simple and refreshing visual effect. It is not only suitable for a variety of everyday wear such as shirts, dresses, and underwear, but is also widely used in professional fields such as uniforms, medical clothing, and sportswear. The purity and high matching ability of white fabric make it a classic choice in clothing design. Despite its many advantages, white fabric can easily show the inner clothing in practice, which can make the wearer feel embarrassed. In recent years, white yoga pants have quietly emerged as a dark horse in the street fashion world. Their unique design and high matching flexibility have won the favor of many women. The popularity of white yoga pants is primarily due to their inherent visual impact. The natural light-reflecting effect of white, combined with the three-dimensional tailoring of yoga pants, perfectly outlines the slender lines of women's legs.

[0003] However, due to the natural light-collecting effect of white, pure white yoga pants are more likely to be see-through than other colors. And because yoga pants are close-fitting, the stretching and twisting of the body will make the fabric's barrier effect worse, so the barrier requirements are higher.

[0004] The main methods to achieve the anti-permeability of white yoga pants are as follows:

[0005] 1. Increasing the number of fabric layers or the thickness of the fabric to improve the anti-transmission effect is the simplest and most direct way. However, for sports products such as yoga pants, it will sacrifice their comfort and breathability and is not suitable for hot summer days.

[0006] 2. Change the color of the fabric to make it darker to achieve an anti-transmission effect. However, this method makes the color of the fabric look not white enough and cannot meet consumers' requirements for pure white yoga pants.

[0007] 3. Add high refractive index powder to improve the anti-penetration effect. However, because high refractive index powder is easy to agglomerate in fibers or fabrics and is difficult to disperse evenly, the current addition of high refractive index powder has limited effect on improving the anti-penetration effect of products such as yoga pants that are difficult to prevent from penetration.

[0008] 4. Using special bionic yarns, whose deflection properties prevent light from being directly reflected by the eye, thus achieving an anti-see-through function. However, the R&D cost of bionic yarns is high, and yarn production requires special equipment and technology, which makes processing more difficult and reduces production efficiency. In addition, some special fiber materials (such as nanomaterials or composite fibers) may affect the breathability of the fabric, making it feel stuffy when worn.

[0009] Therefore, it is difficult to achieve both pure white color and good breathability and anti-transmission performance for sportswear. Therefore, it is of great significance to develop a fabric suitable for sports products that is visually pure white and comfortable and anti-transmission. Summary of the Invention

[0010] In view of the deficiencies in the prior art, the present invention provides an anti-seepage fabric and white yoga pants with better anti-seepage effect and better white effect.

[0011] The present invention provides a barrier fabric, wherein the thickness of the barrier fabric is 0.4-1.2 mm, the raw materials of the barrier fabric include nylon, spandex and titanium dioxide particles, the weaving density WPI of the barrier fabric is 55-75, and the CPI is 60-90. The front side of the barrier fabric is white and the back side is a target gray. The verification method of the target gray comprises the following steps:

[0012] Input the reflectance value of the standard gray into the optical analyzer and set the color as the standard color. Scan the measured color to be verified and then output the CMC DE value. If the CMC DE value is within the range of ±22, the measured color is judged to be the target gray.

[0013] Preferably, the reflectivity values ​​of the standard gray are 31 reflectivity values ​​within the wavelength range of 400nm-700nm obtained by using a spectrometer, and the 31 reflectivity values ​​are 28.50, 47.57, 55.78, 57.99, 57.26, 56.25, 56.43, 56.93, 58.20, 59.10, 59.63, 59.25, 57.88, 56.00, 53.97, 52.61, 51.60, 50.28, 49.78, 50.27, 51.66, 53.10, 54.46, 56.06, 58.13, 61.15, 65.54, 71.73, 79.50, 83.38, and 87.32.

[0014] Preferably, the reflectivity value of the standard gray is the reflectivity value every 10 nm within the wavelength range of 400 nm to 700 nm;

[0015] The reflectivity values ​​in the wavelength range of 400nm-450nm are: 28.50, 47.57, 55.78, 57.99, 57.26, 56.25; the reflectivity values ​​in the wavelength range of 460nm-510nm are: 56.43, 56.93, 58.20, 59.10, 59.63, 59.25; the reflectivity values ​​in the wavelength range of 520nm-570nm are: 57.88, 56.00, 53. The reflectivity values ​​in the wavelength range of 580nm-630nm are: 49.78, 50.27, 51.66, 53.10, 54.46, 56.06; the reflectivity values ​​in the wavelength range of 640nm-690nm are: 58.13, 61.15, 65.54, 71.73, 79.50, 83.38; the reflectivity value at a wavelength of 700nm is 87.32.

[0016] Preferably, if the CMC DE value is within the range of ±10, the measured color is judged to be the target gray.

[0017] Preferably, the weight of the anti-seepage fabric is 200-280g / m 2 .

[0018] Preferably, the amount of titanium dioxide particles added to the raw materials of the anti-seepage fabric is 5-15%.

[0019] Preferably, the amount of titanium dioxide particles added to the raw materials of the anti-seepage fabric is 7-10%.

[0020] Preferably, the reverse side of the anti-transmission fabric is processed into the target gray by a printing method. Specifically, the reverse side of the double-sided white fabric with a whiteness of 90-99 is processed into the target gray by a printing method.

[0021] Preferably, the method for preparing the anti-seepage fabric comprises the following steps:

[0022] S1. Blending micron-sized titanium dioxide and nylon chips through a twin-screw extruder to obtain core masterbatch; granulating nano-sized titanium dioxide and nylon chips through a high-shear twin-screw extruder to obtain skin masterbatch;

[0023] S2, spinning the core layer masterbatch and the skin layer masterbatch through a two-component composite spinning machine to obtain a core-skin composite fiber;

[0024] S3, feeding the spandex core yarn and the core-sheath composite fiber into a covering machine simultaneously to form an elastic yarn;

[0025] S4. Using the elastic yarn, a cloth with both front and back surfaces being white is prepared;

[0026] S5. Process the reverse side into target gray through the method.

[0027] The present invention also provides white yoga pants, which are prepared using the anti-transmission fabric.

[0028] The present invention also provides a white sports bra, which is prepared by using the anti-transmission fabric.

[0029] The anti-seepage fabric, white yoga pants and white sports bra provided by the present invention are obtained by processing the back of a white fabric whose raw materials include nylon, spandex and titanium dioxide particles into a target gray color, so that the fabric has a strong anti-seepage effect and a white effect on the front side visually. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the accompanying drawings, and the drawings are not drawn to scale with actual size. The emphasis is on illustrating the subject matter of the present invention.

[0031] Figure 1 The fabric photo provided in Example 1 of the present invention;

[0032] Figure 2 A color photograph of the standard gray referred to in the present invention;

[0033] Figure 3 To obtain the reflectance value of standard gray using a spectrometer;

[0034] Figure 4 The output of the optical analyzer when verifying the target gray in Example 1;

[0035] Figure 5 This is a photo of the first anti-transmission effect of sample AD;

[0036] Figure 6 This is a photo of the second anti-transmission effect of sample AD;

[0037] Figure 7 This is a photo of the third anti-transmission effect of sample AD;

[0038] Figure 8 This is a photo of the fourth anti-transmission effect of sample AD;

[0039] Figure 9 This is a photo of the fifth anti-transmission effect of samples AD;

[0040] Figure 10 This is a photo of the sixth anti-transmission effect of samples AD;

[0041] Figure 11 For photos of yoga pants g1;

[0042] Figure 12 For photos of yoga pants g2;

[0043] Figure 13 Photos of yoga pants g2 being worn on a model sample;

[0044] Figure 14 This is a photo comparing the front color of the printed fabric in Example 1 with the PANTONE color.

[0045] Figure 15 The output of the optical analyzer when verifying the target gray for Comparative Example 1;

[0046] Figure 16 This is a photo comparing the front color of the printed fabric of Comparative Example 1 with the PANTONE color. DETAILED DESCRIPTION

[0047] The technical solutions of the present invention are further described in detail below in conjunction with specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0048] The embodiment of the present invention provides a kind of anti-seepage fabric, the thickness of the anti-seepage fabric is 0.4-1.2mm, the raw materials of the anti-seepage fabric include nylon, spandex and titanium dioxide particles, the weaving density WPI of the anti-seepage fabric is 55-75, the CPI is 60-90, the front of the anti-seepage fabric is white, the back is the target gray, and the whiteness of the front of the anti-seepage fabric is 90-99. The raw materials of the anti-seepage fabric provided by the present invention are added with titanium dioxide particles, and the weaving density of the fabric is reasonable, and the fabric has a certain covering effect. The back of the fabric is processed into the target gray by printing, and after the printing process, the white color of the front of the fabric is not greatly affected, and it still looks like a white fabric, which can be well used to prepare white clothing, such as white sports pants, white yoga pants, white sports bras, etc.

[0049] The anti-permeability fabric provided by the present invention comprises raw materials including nylon, spandex and titanium dioxide particles. By adding titanium dioxide particles to the fabric, the basic anti-permeability performance of the fabric is achieved. Spandex is used to solve the problem of insufficient elasticity easily caused by the addition of titanium dioxide, thereby improving the elasticity, so that the anti-permeability fabric provided by the present invention can have appropriate elasticity and meet the preparation requirements of yoga pants.

[0050] The barrier fabric provided by the present invention has a weave density (WPI) of 55-75 and a CPI of 60-90. In a further embodiment, the barrier fabric has a weave density (WPI) of 60-70 and a CPI of 71-80. When used as yoga pants, the barrier fabric of the present invention has an appropriate weave density, not too low, providing a certain barrier effect and wear resistance, while not too high, ensuring good breathability.

[0051] The anti-seepage fabric provided by the present invention itself has a certain anti-seepage effect due to the addition of titanium dioxide and a reasonable weaving density. However, for white fabrics, the anti-seepage effect is still limited. The present invention further improves the anti-seepage effect of the fabric by treating the back of the fabric to the target gray. Although the back of the fabric of the present invention is treated to the target gray, because of the specific fabric of the present invention, its front still retains a good white effect (the back of the white fabric used to prepare ordinary yoga pants is printed and treated to the target gray, which will affect the white effect of the front, and the front will be gray and not white enough). Therefore, the anti-seepage fabric of the present invention can be used to prepare white yoga pants. After the anti-seepage test, the effect of the anti-seepage fabric of the present invention is very significant.

[0052] The barrier fabric provided by the present invention has excellent barrier properties due to its raw material, weave density, and reverse printing treatment. Therefore, the barrier fabric provided by the present invention can be relatively thin. The barrier fabric provided by the present invention has a thickness of 0.4-1.2 mm, and further has a thickness of 0.6-1.0 mm. When used as yoga pants, the thickness is appropriate, the fabric is not too thin, thus providing good wear resistance and concealment, and the fabric is not too thick, thus providing good breathability and comfort.

[0053] Before printing, the barrier fabric of the present invention has a whiteness of 90-99% without the use of a fluorescent brightener. After the reverse side is printed to the target gray, the pure white front side maintains a good white effect, visually demonstrating a very good pure white effect. This allows the front side of the fabric to present a pure white visual effect when made into yoga pants, satisfying consumer demand for pure white yoga pants.

[0054] The reverse side of the barrier fabric of the present invention is treated to a target gray. On the one hand, the target gray cannot be too dark. Even with the fabric prepared by the present invention, a darker gray will still affect the white effect of the front side of the fabric, causing the white on the front side of the fabric to darken and visually deteriorate the white effect of the front side. On the other hand, the target gray cannot be too light. A too light gray will not have a visual effect when exposed to light and will not achieve the desired effect of improving the barrier effect of the fabric. Therefore, the target gray color of the present invention should be appropriate.

[0055] However, although the same printing method is used in the actual production process, the gray color will be processed in sequence, which will have uncontrollable color differences. It is impossible to determine whether the gray color after printing is the target gray color we want. There are no control standards during product preparation, and it is difficult to guarantee the final quality of the anti-permeability fabric.

[0056] The present inventors have found through extensive research that, by using the following verification method, it is possible to quickly determine whether the printed color meets the target gray using an optical analyzer.

[0057] The target gray verification method provided by the present invention comprises the following steps:

[0058] S1. Set the standard gray and then use the spectrometer to get the reflectance value of the standard gray. The standard gray is a specific color selected through a large number of experiments. Figure 2 As shown in the figure, the reflectance values ​​of standard gray can be obtained by the spectrometer. Specifically, 31 reflectance values ​​of standard gray in the wavelength range of 400nm-700nm are obtained by the spectrometer, which are 28.50, 47.57, 55.78, 57.99, 57.26, 56.25, 56.43, 56.93, 58.20, 59.10, 59.63, 59.25, 57.88, 56.00, 53.97, 52.61, 51.60, 50.28, 49.78, 50.27, 51.66, 53.10, 54.46, 56.06, 58.13, 61.15, 65.54, 71.73, 79.50, 83.38, and 87.32.

[0059] The 31 reflectivity values ​​are specifically reflectivity values ​​at intervals of 10 nm within a wavelength range of 400 nm to 700 nm.

[0060] The reflectivity values ​​in the wavelength range of 400-450nm are: 28.50, 47.57, 55.78, 57.99, 57.26, 56.25;

[0061] The reflectivity values ​​in the wavelength range of 460-510nm are: 56.43, 56.93, 58.20, 59.10, 59.63, 59.25;

[0062] The reflectivity values ​​in the wavelength range of 520-570nm are: 57.88, 56.00, 53.97, 52.61, 51.60, 50.28;

[0063] The reflectivity values ​​in the wavelength range of 580-630nm are: 49.78, 50.27, 51.66, 53.10, 54.46, 56.06;

[0064] The reflectivity values ​​in the wavelength range of 640-690nm are: 58.13, 61.15, 65.54, 71.73, 79.50, 83.38;

[0065] The reflectivity value at a wavelength of 700nm is 87.32.

[0066] S2. Input the reflectivity value of the standard gray into the optical analyzer to obtain the standard gray color, and set the color as the standard color. In the actual production process, after the back of the fabric is printed, the back that has been processed into gray is scanned by an optical analyzer. The optical analyzer scans the measured color to be verified, and then outputs the CMC DE value. If the CMC DE value is within the range of ±22, it is judged that the measured color is the target gray referred to in the present invention. When the back of the fabric is processed into the target gray referred to in the present invention, it will not affect the white effect of the white on the front, and can be prepared into yoga pants that appear pure white on the front, and it will have an impact on the visual sense, and can have a good anti-seethrough effect.

[0067] In a further embodiment, the measured color is determined to be the target gray if the CMC DE value is within the range of ±10. In a further preferred embodiment, the measured color is determined to be the target gray if the CMC DE value is within the range of ±1.

[0068] The DE value in the data output by an optical analyzer represents the color difference between the measured color and the reference color. A smaller DE value indicates a smaller difference between the two colors, meaning they are closer; a larger DE value indicates a larger color difference. CMC, short for Color Measurement Committee, is a color difference formula that takes into account the human eye's perception of color differences and is commonly used in the textile industry. A smaller CMC DE value indicates a more accurate color match.

[0069] The optical analyzer will output three CMC DE values ​​under different light sources or observation angles, such as the measurement results under three different standard light sources: D65 10Deg, CWF 10Deg, and A 10Deg.

[0070] In this invention, the maximum of three CMC DE values ​​is primarily used to determine whether the measured color is the target gray. For example, three CMC DE values ​​are output under three different standard light sources. The largest value is taken and checked to see if it is within the range of ±22. If this condition is met, the measured color is determined to be the target gray as defined in this invention.

[0071] In a preferred embodiment, the weight of the barrier fabric is 200-280 g / m 2 The barrier fabric provided by the present invention has an appropriate weight and can provide both comfortable movement and durability.

[0072] In a preferred embodiment, the amount of titanium dioxide particles added to the raw materials of the barrier fabric is 5-15%. In a further preferred embodiment, the amount of titanium dioxide particles added is 7-10%.

[0073] In a preferred embodiment, the anti-seepage fabric includes the following preparation method:

[0074] S1. Micron-sized titanium dioxide and nylon chips are blended and granulated through a twin-screw extruder to obtain core layer masterbatch; the particle size of micron-sized titanium dioxide is 1-4 μm, and micron-sized titanium dioxide has less wear on spinning equipment.

[0075] Nano-scale titanium dioxide and nylon chips are granulated through a high-shear twin-screw extruder to obtain a skin masterbatch; the particle size of the nano-scale titanium dioxide is 60-70nm.

[0076] S2. The core and skin masterbatches are spun using a two-component composite spinning machine to produce a core-skin composite fiber. The core-skin composite fiber contains micron-sized titanium dioxide, which is easier to disperse and less likely to agglomerate than nano-sized titanium dioxide, causing less wear on spinning equipment and providing enhanced barrier properties. Furthermore, the core-skin composite fiber also contains nano-sized titanium dioxide to reduce fabric stiffness. Using a twin-screw extruder can improve its dispersion performance. Sodium polyacrylate dispersant can also be added to prevent nanoparticle agglomeration.

[0077] The core layer can be made of nylon 6, which has a lower melting point and is suitable for core processing. The skin layer can be made of nylon 66, which has better heat resistance and is suitable for high-temperature spinning. The core layer accounts for 60% of the skin layer, and the micron-sized titanium dioxide in it provides excellent barrier effect. The skin layer accounts for 40% of the skin layer, which absorbs UV rays and improves surface softness.

[0078] S3. Feed the spandex core yarn and the core-skin composite fiber simultaneously into the covering machine to form elastic yarn; select 40D high-elastic spandex, which accounts for 8%-10% of the total yarn mass. Spandex is used to solve the problem of insufficient elasticity easily caused by the addition of titanium dioxide, and improve elasticity. At the same time, spandex as the core yarn can avoid aging caused by direct exposure, and has better durability.

[0079] S4. Using the elastic yarn, a cloth with both front and back surfaces being white is prepared;

[0080] S5. Process the reverse side into target gray through a printing process.

[0081] In order to have a further understanding and recognition of the technical solution of the present invention, several preferred embodiments are listed and described in further detail.

[0082] Fabric x,

[0083] Prepared by the following method:

[0084] Core layer masterbatch preparation

[0085] Titanium dioxide: particle size 1-4μm, accounting for 10% of the total mass of the core nylon, nylon substrate: nylon 6 chips. Micron-sized TiO2 and nylon 6 chips are blended and granulated through a twin-screw extruder (temperature 220-240℃), with an aspect ratio of 36:1 and a shear rate of 300-400rpm.

[0086] Cortex masterbatch preparation

[0087] Titanium dioxide: Particle size 60-90nm, surface modified with a silane coupling agent (KH-550), accounting for 5% of the total nylon skin mass. Nylon substrate: Nylon 66 chips. Nano-sized TiO2 and nylon 66 chips are pelletized in a high-shear twin-screw extruder (temperature 250-270°C) with an aspect ratio of 40:1 and a shear rate of 500-600 rpm.

[0088] Preparation of sheath-core composite fibers

[0089] The core and core masterbatches were mixed and spun using a bicomponent composite spinning machine (separate core / cortex feedstock). The core component was 60% (micron-grade TiO2 / nylon 6); the cortex component was 40% (nano-grade TiO2 / nylon 66). Spinning parameters included core temperature of 240-250°C, cortex temperature of 260-270°C, and screw speeds of 300 rpm for the core and 600 rpm for the cortex.

[0090] Spandex core-spun yarn molding

[0091] 40D high-elastic spandex is selected as the core yarn, accounting for 8% of the total yarn mass, as the elastic core of the core-spun yarn. The spandex core yarn (yarn feeding tension 3-5cN) and the core-sheath composite fiber are fed into the covering machine simultaneously. The covering ratio is: core-sheath composite fiber (92%) + spandex (8%), and the yarn twist is controlled to 900 twists / m.

[0092] The prepared core-spun yarn is woven into fabric x, the density of fabric x is 66, the CPI is 79, the thickness is 0.68 mm, the fabric is double-sided white, the whiteness of the fabric is 96, and the weight is 255 g / m 2 .

[0093] Contrast fabric x1

[0094] A commercially available double-sided nylon spandex fabric suitable for making yoga pants is model 15717, with a nylon content of 42% and a spandex content of 58%. The fabric has a WPI of 70, a CPI of 104, a thickness of 0.82 mm, and is double-sided white with a whiteness of 97. It weighs 270 g / m2. 2.

[0095] Printing treatment method

[0096] The reverse side of the fabric is printed in gray, resulting in a fabric with a white front and a gray reverse side.

[0097] Digital direct printing is used for printing, using disperse gray dyes (such as Dystar Dianix series), grayscale mode output, resolution 720dpi, pass number 4 times, and ink volume controlled at 12ml / m 2 .

[0098] Verification method of target gray

[0099] Take the standard gray color, such as Figure 2 The reflectance value of standard gray is measured by a spectrometer, as shown in Figure 3 As shown, 31 reflectivity values ​​in the wavelength range of 400nm-700nm are obtained, and the 31 reflectivity values ​​are 28.50, 47.57, 55.78, 57.99, 57.26, 56.25, 56.43, 56.93, 58.20, 59.10, 59.63, 59.25, 57.88, 56.00, 53.97, 52.61, 51.60, 50.28, 49.78, 50.27, 51.66, 53.10, 54.46, 56.06, 58.13, 61.15, 65.54, 71.73, 79.50, 83.38, and 87.32, respectively.

[0100] Input the reflectance value of the standard gray into the optical analyzer and set this color as the standard color. Scan the measured color to be verified and then output three CMC DE values. The three output CMC DE values ​​are the measurement results under three different standard light sources: D65 10Deg, CWF 10Deg, and A10Deg. If all three CMC DE values ​​are within the range of ±10, the measured color is determined to be the target gray referred to in this invention.

[0101] Example 1

[0102] The reverse side of fabric x is processed into a target gray by printing method y, thereby obtaining fabric x+y with a white front side and a gray reverse side.

[0103] The target gray verification method z is used to verify whether the gray after printing processing is the target gray.

[0104] like Figure 4As shown, the three output CMC DE values ​​are 8.17, 8.46 and 8.44 respectively, all of which satisfy the CMC DE value within the range of ±10. Therefore, the reverse color of the fabric in this embodiment is the target gray.

[0105] By conducting a PANTONE color comparison, its front white color matches 11-4201 Cloud Dancer, such as Figure 14 As shown, the color visually appears whiter.

[0106] Comparative Example 1

[0107] The comparative fabric x1 is processed into the target gray by printing method y, thereby obtaining fabric x1+y.

[0108] The target gray verification method z is used to verify whether the gray after printing is the target gray. Figure 15 As shown in FIG, the three output CMC DE values ​​are 4.11, 5.27, and 4.81, respectively, all of which satisfy the CMC DE value range of ±10. Therefore, the reverse color of the fabric is the target gray.

[0109] By conducting a PANTONE color comparison, its positive white color meets 14-4106TCX Gray dawn, such as Figure 16 As shown, the color visually appears grayish.

[0110] Effect Examples

[0111] (1) Anti-transmission effect verification (masking effect on pattern)

[0112] Samples A to D were taken. Sample A was fabric x+y obtained in Example 1; Sample B was fabric x itself; Sample C was fabric x1+y obtained in Comparative Example 1; and Sample B was fabric x1. Table 1 summarizes the fabric selection and whether the reverse side of the samples was printed.

[0113] Table 1

[0114]

[0115] After stretching samples AD by 50%×50%, they were covered on the same pattern to observe their anti-transmission effect. Figure 5-10 shown.

[0116] It can be seen that when the existing nylon fabric x1 is used as the fabric, the anti-transmission performance of sample D is poor, and the bottom pattern cannot be blocked at all. When the reverse side of the existing nylon fabric x1 is printed to the target gray, the anti-transmission performance of sample C shows preliminary anti-transmission properties, but the bottom pattern is still relatively clear. When the fabric x prepared by the present invention is used as a sample, it can be seen that sample B can have a certain degree of shielding for some patterns, but it is still difficult to block patterns that are difficult to cover. When the fabric x prepared by the present invention is used as a sample and the reverse side is printed to the target gray, it can be seen that sample A still has a good anti-transmission effect after being stretched 50%×50%, and the bottom pattern is basically invisible.

[0117] For this reason, Sample A's fabric, when used to make white yoga pants, offers excellent barrier properties. Even when worn by a heavier user, the body's ability to stretch the fabric by less than 50% x 50% is generally not enough. Therefore, Sample A's fabric offers even better barrier properties when used to make white yoga pants, effectively preventing the bottom pattern from being visible.

[0118] (2) Preparation of white yoga pants

[0119] Prepared white yoga pants g1, such as Figure 11 As shown in the figure, the left and right legs are made of fabric sample A, while the right leg is made of fabric sample B. Both are made of fabric x, with sample A having its reverse printed. Although the reverse side of sample A is printed gray, from a consumer's perspective, the front sides of both legs appear to be similarly white, maintaining a good white finish and meeting the requirement for white yoga pants to be sufficiently white.

[0120] Prepared white yoga pants g2, such as Figure 12 As shown, the left and right trouser legs are made of fabric from Sample A, while the right leg uses fabric from Sample C. While the two fabrics are different, both undergo the same printing process, resulting in the reverse side being treated to the target gray. It can be observed that when existing nylon fabrics are treated to the target gray using the same printing conditions, the reverse side is also significantly affected, significantly reducing the whiteness of the reverse side. Visually, the reverse side also appears gray, failing to achieve a satisfactory white effect and failing to meet the requirements for white pants.

[0121] (3) Anti-transmission effect verification (for the concealment effect of internal wear marks)

[0122] Put on the model props a very revealing inner garment with a relatively complex lace pattern, and then put the model props on the prepared white yoga pants g2, such as Figure 13As shown in the figure, the left side corresponds to the left trouser leg using Sample A, and the right side corresponds to the right trouser leg using Sample C. It can be observed that the left trouser leg made of fabric x+y obtained in Example 1 is relatively pure white and has a certain effect on concealing the inner wear marks. The right trouser leg using Sample C shows the inner wear marks more clearly.

[0123] In summary, it can be seen that the anti-transmission fabric prepared by the present invention has a suitable thickness and elasticity suitable for the preparation of yoga pants. The front side has a good pure white effect, and the back side is printed into gray. It has a good shielding effect for brightly colored inner wear and inner wear with more traces.

[0124] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A waterproof fabric, characterized in that: The thickness of the anti-permeability fabric is 0.4-1.2 mm. The raw materials of the anti-permeability fabric include nylon, spandex and titanium dioxide particles. The weaving density WPI of the anti-permeability fabric is 55-75 and the CPI is 60-90. The front side of the anti-permeability fabric is white and the back side is target gray. The verification method of the target gray includes the following steps: Input the reflectance value of the standard gray into the optical analyzer, set the color as the standard color, scan the measured color to be verified, and then output the CMC DE value. When the CMC DE value is within the range of ±22, the measured color is judged to be the target gray.

2. The anti-seepage fabric according to claim 1, characterized in that: The reflectivity values ​​of the standard gray are 31 reflectivity values ​​within the wavelength range of 400nm-700nm obtained by using a spectrometer, and the 31 reflectivity values ​​are 28.50, 47.57, 55.78, 57.99, 57.26, 56.25, 56.43, 56.93, 58.20, 59.10, 59.63, 59.25, 57.88, 56.00, 53.97, 52.61, 51.60, 50.28, 49.78, 50.27, 51.66, 53.10, 54.46, 56.06, 58.13, 61.15, 65.54, 71.73, 79.50, 83.38, and 87.

32.

3. The anti-seepage fabric according to claim 1, characterized in that: The reflectivity value of the standard gray is the reflectivity value every 10nm within the wavelength range of 400nm-700nm; The reflectivity values ​​in the wavelength range of 400nm-450nm are: 28.50, 47.57, 55.78, 57.99, 57.26, 56.25; the reflectivity values ​​in the wavelength range of 460nm-510nm are: 56.43, 56.93, 58.20, 59.10, 59.63, 59.25; the reflectivity values ​​in the wavelength range of 520nm-570nm are: 57.88, 56.00, 53. The reflectivity values ​​in the wavelength range of 580nm-630nm are: 49.78, 50.27, 51.66, 53.10, 54.46, 56.06; the reflectivity values ​​in the wavelength range of 640nm-690nm are: 58.13, 61.15, 65.54, 71.73, 79.50, 83.38; the reflectivity value at a wavelength of 700nm is 87.

32.

4. The anti-seepage fabric according to claim 1, characterized in that: When the CMC DE value is within the range of ±10, the measured color is judged to be the target gray.

5. The anti-seepage fabric according to claim 1, characterized in that: The weight of the anti-seepage fabric is 200-280g / m 2 .

6. The anti-seepage fabric according to claim 1, characterized in that: The amount of titanium dioxide particles added to the raw materials of the anti-permeability fabric is 5-15%.

7. The anti-seepage fabric according to claim 1, characterized in that: The reverse side of the anti-seepage fabric is processed into a target gray by a printing method. Specifically, the reverse side of the double-sided white fabric with a whiteness of 90-99 is processed into a target gray by a printing method.

8. The anti-seepage fabric according to claim 1, characterized in that: The preparation method of the anti-seepage fabric comprises the following steps: S1. Blending micron-sized titanium dioxide and nylon chips through a twin-screw extruder to obtain core masterbatch; granulating nano-sized titanium dioxide and nylon chips through a high-shear twin-screw extruder to obtain skin masterbatch; S2, spinning the core layer masterbatch and the skin layer masterbatch through a two-component composite spinning machine to obtain a core-skin composite fiber; S3, feeding the spandex core yarn and the core-sheath composite fiber into a covering machine simultaneously to form an elastic yarn; S4. Using the elastic yarn, a cloth with both front and back surfaces being white is prepared; S5. Process the reverse side into target gray through the method.

9. A pair of white yoga pants, characterized in that: The white yoga pants are prepared using the anti-transmission fabric as described in any one of claims 1 to 8.

10. A white sports bra, characterized in that: The white sports bra is prepared using the anti-permeability fabric according to any one of claims 1 to 8.

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