Fire resistant fabric resistant to penetration of perspiration and method of making same

Abstract

The application provides a head oil permeation prevention flame-retardant fabric and a preparation method thereof. The head oil permeation prevention flame-retardant fabric comprises a surface layer, an inner layer and an intermediate layer filled between the surface layer and the inner layer; the surface layer and the inner layer are respectively woven by surface layer yarns and inner layer yarns, and the surface layer and the inner layer are connected through linking stitches; the surface layer yarns comprise flame-retardant viscose fibers and flame-retardant polyester filaments, the inner layer yarns comprise DTY flame-retardant polyester filaments and FDY flame-retardant polyester filaments, and the intermediate layer comprises flame-retardant viscose fibers and kapok fibers. When the head oil permeation prevention flame-retardant fabric is prepared, hot water washing and air washing are further performed after a woven fabric is obtained through on-machine weaving. Through the above method, the head oil in contact with the surface layer can be guided into the intermediate layer for absorption and storage through the synergistic effect of the material and structure of the surface layer, the intermediate layer and the inner layer, and the head oil can be physically isolated through the inner layer, so that the head oil is guided, absorbed, stored and isolated, and the head oil permeation is effectively prevented while the air permeability of the fabric is ensured.

Description

Technical Field

[0001] This invention relates to the field of textile fabric technology, and in particular to a flame-retardant fabric that prevents hair oil penetration and its preparation method. Background Technology

[0002] The main components of scalp oil include triglycerides, fatty acid phospholipids, and esterified cholesterol. The amount of scalp oil produced is generally related to individual constitution; some people have more developed hair follicles and produce more scalp oil, while others only produce more scalp oil under external stimuli. Scalp oil is originally meant to nourish hair growth, but excessive scalp oil can easily stain textiles it comes into contact with. This staining can easily penetrate the fabric under external force, causing contamination of the fabric's interior and the textiles it comes into contact with. Normal stains are relatively easy to clean, but for personal protective equipment such as hats, especially helmets with outer shells, the inner protective fabric is difficult to clean, and once it penetrates the inner fixing layer, it becomes even more difficult to clean. Since the inner fixing layer of a helmet cannot be removed, the inner fixing layer, when soaked in scalp oil for a long time, will emit a pungent odor, affecting the wearer's experience. At the same time, the components of scalp oil can also reduce the helmet's flame retardant protection rating.

[0003] Currently, there are two main types of flame-retardant fabrics that prevent scalp oil penetration: The first type undergoes a direct oil- and water-repellent treatment. This type of fabric has a certain degree of oil-repellent performance, but under certain pressure conditions, scalp oil can still penetrate. The second type of fabric has a normal fabric side that comes into contact with the hair, prioritizing comfort. Its back side has a TPU film, which provides waterproofing and oil-proofing, effectively preventing scalp oil penetration. However, due to the film coating, prolonged contact with this fabric can cause a stuffy feeling.

[0004] For example, patent CN105216413A discloses an oil-resistant fabric, comprising a fabric layer and an oil-resistant layer. The oil-resistant layer is sprayed onto the fabric layer and contains polyetheretherketone (PEEK) and amphiphilic polyurethane to achieve effective oil resistance. However, with increased use and pressure, oil and stains can still penetrate the inner layer, and the thickness of the oil-resistant layer also affects the fabric's drape. Patent CN205094040U discloses a waterproof and stain-resistant mite-proof pillowcase, comprising a bamboo fiber layer, a polyester fiber layer, and a TPU layer. The TPU layer can prevent oil from entering the pillow core. However, with increased use, it not only creates a stuffy feeling, but the TPU is also prone to hydrolysis, yellowing, and aging.

[0005] In view of this, it is necessary to design an improved flame-retardant fabric that prevents head oil penetration and its preparation method to solve the above problems. Summary of the Invention

[0006] To address the shortcomings of the existing technology, the present invention aims to provide a flame-retardant fabric that prevents scalp oil penetration and its preparation method. The present invention constructs the flame-retardant fabric with a three-layer woven structure, utilizing the synergistic effect between the layers to guide, absorb, store, and isolate scalp oil, thereby effectively preventing scalp oil penetration while ensuring fabric breathability.

[0007] To achieve the above objectives, the present invention provides a flame-retardant fabric that prevents hair oil penetration, comprising a surface layer, an inner layer, and an intermediate layer filled between the surface layer and the inner layer; the surface layer and the inner layer are respectively woven from surface yarn and inner layer yarn, and the surface layer and the inner layer are connected by a bonding structure; the surface yarn comprises flame-retardant viscose fiber and flame-retardant polyester filament, the inner layer yarn comprises DTY flame-retardant polyester filament and FDY flame-retardant polyester filament, and the intermediate layer comprises flame-retardant viscose fiber and kapok fiber.

[0008] As a further improvement of the present invention, the surface yarn is a wrapped yarn, comprising flame-retardant viscose fiber as the core layer and high-F-number FDY flame-retardant polyester filament wrapped around the flame-retardant viscose fiber; the fineness of the high-F-number FDY flame-retardant polyester filament is 10-20D, and the F-number is >25; preferably, the fineness of the high-F-number FDY flame-retardant polyester filament is 15D, and the F-number is 30.

[0009] As a further improvement of the present invention, the inner layer yarn is a ply yarn of DTY flame-retardant polyester filament and FDY flame-retardant polyester filament; the fineness of both the DTY flame-retardant polyester filament and the FDY flame-retardant polyester filament is 40-60D, and the F number is 20-30; preferably, the fineness of both the DTY flame-retardant polyester filament and the FDY flame-retardant polyester filament is 50D, and the F number is 25.

[0010] As a further improvement of the present invention, in the intermediate layer, the mass ratio of kapok fiber to flame-retardant viscose fiber is 4:6 to 7:3, and the main body length of the kapok fiber is 14 to 16 mm.

[0011] As a further improvement of the present invention, the yarn count of the outer layer yarn is 40-60S / 2, the warp density of the outer layer yarn is 140-180 ends / inch, and the weft density is 90-120 ends / inch; the yarn count of the inner layer yarn is 40-60D / 2, the warp density of the inner layer yarn is 110-120 ends / inch, and the weft density is 80-90 ends / inch.

[0012] This invention also provides a method for preparing a flame-retardant fabric that prevents hair oil penetration, comprising the following steps:

[0013] S1. Determine the material and structure of the outer layer yarn, inner layer yarn, and middle layer yarn; determine the weave structure and splicing method of the outer and inner layers, and design the machine layout diagram;

[0014] S2. Weave the fabric on the loom according to the loom drawing to obtain the woven fabric;

[0015] S3. The woven fabric is sequentially washed with water and air, and the surface is brushed to obtain a flame-retardant fabric that is resistant to hair oil penetration.

[0016] As a further improvement of the present invention, in step S1, the intermediate layer yarn is a wrapped yarn, including flame-retardant viscose fiber, kapok fiber and water-soluble vinylon fiber as the core layer and water-soluble vinylon fiber wrapped around the core layer.

[0017] As a further improvement of the present invention, in step S3, the temperature of the water washing is higher than the dissolution temperature of the water-soluble vinylon fiber; preferably, the temperature of the water washing is 80-90°C.

[0018] As a further improvement of the present invention, in step S1, the surface layer and the inner layer have a weave structure of plain weave, twill weave, or satin weave.

[0019] As a further improvement of the present invention, in step S1, the connection method between the outer layer and the inner layer is one of the following: inner warp to outer weft, outer warp to inner weft, or a combination of both.

[0020] The beneficial effects of this invention are:

[0021] 1. The anti-oil penetration flame-retardant fabric provided by the present invention comprises a three-layer fabric structure. The yarn used in the outer layer fabric contains hydrophilic flame-retardant viscose fiber and hydrophobic and oleophilic flame-retardant polyester filament, which can guide oil from the outer layer to the middle layer through the flame-retardant polyester filament, while the flame-retardant viscose fiber absorbs the moisture accompanying the oil. After the oil is guided to the middle layer by the flame-retardant polyester filament, the large amount of kapok fiber contained in the middle layer can effectively absorb and store the oil. On this basis, the DTY flame-retardant polyester filament and FDY flame-retardant polyester filament contained in the inner layer fabric form a high-density fabric structure containing loops, which can produce a double physical isolation effect to prevent the oil stored in the kapok fiber from seeping out. Based on the synergistic effect of the materials and structures of the three layers of fabric—outer layer, middle layer, and inner layer—hair oil that comes into contact with the outer layer can be guided into the middle layer, where it is absorbed and stored by the cotton fibers. At the same time, the inner layer provides physical isolation, thus achieving the functions of guiding, absorbing, storing, and isolating hair oil. This ensures the breathability of the fabric while effectively preventing the penetration of hair oil.

[0022] 2. The method for preparing the anti-hair oil penetration flame-retardant fabric provided by the present invention utilizes a bonding structure to connect the outer layer and the inner layer, creating relatively independent areas between them. Based on this, by adding water-soluble fibers to the middle layer yarn and washing it with hot water at a temperature higher than the dissolution temperature of the water-soluble fibers after weaving, the water-soluble fibers can be dissolved, causing the middle layer yarn to disintegrate. Simultaneously, the air washing following the water washing further disperses the short-fibered kapok fibers in the middle layer yarn into the relatively independent areas formed between the outer and inner layers, forming a filling layer to effectively absorb the introduced hair oil. Furthermore, during hot water washing, on the one hand, the DTY flame-retardant polyester filaments in the inner layer shrink due to heat sensitivity, making the already high warp and weft density of the inner layer even tighter, making it difficult for water and oil to pass through; on the other hand, the FDY flame-retardant polyester filaments in the inner layer do not shrink during hot water washing. When the DTY flame-retardant polyester filaments shrink, they form some loops in the inner layer. These loops can form a physical space isolation with the textiles they come into contact with. Thus, the loops and the tight inner layer achieve double physical isolation, achieving a good effect of preventing hair oil penetration. Attached Figure Description

[0023] Figure 1 This is a cross-sectional structural diagram of the flame-retardant fabric that prevents head oil penetration provided by the present invention.

[0024] Figure 2 The image shows the fabric used in Example 1, which is designed to prevent oil penetration and is flame-retardant.

[0025] Figure Labels

[0026] 1-Surface layer; 2-Middle layer; 3-Inner layer. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0029] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] This invention provides a flame-retardant fabric that prevents hair oil penetration, the cross-sectional structure of which is shown in the figure below. Figure 1 As shown, it includes an outer layer 1, an inner layer 3, and an intermediate layer 2 filled between the outer layer 1 and the inner layer 3; the outer layer 1 and the inner layer 3 are woven from outer layer yarn and inner layer yarn respectively, and the outer layer 1 and the inner layer 3 are connected by a splicing structure; the outer layer yarn includes flame-retardant viscose fiber and flame-retardant polyester filament, the inner layer yarn includes DTY flame-retardant polyester filament and FDY flame-retardant polyester filament, and the intermediate layer 2 includes flame-retardant viscose fiber and kapok fiber.

[0031] In this way, when the surface layer 1 of the anti-hair oil penetration flame retardant fabric comes into contact with hair oil, the hair oil can be introduced into the middle layer through the flame retardant polyester fibers in the surface layer 1. The moisture accompanying the hair oil is absorbed by the flame retardant viscose fibers in the surface layer 1. The hair oil introduced into the middle layer 2 is absorbed and stored by the kapok fibers. The inner layer 3 plays an effective physical isolation role, preventing the hair oil absorbed by the kapok fibers in the middle layer 2 from seeping out through the inner layer 3. This achieves the functions of guiding, absorbing, storing, and isolating hair oil, thereby effectively preventing hair oil penetration while ensuring the breathability of the fabric.

[0032] Preferably, the outer layer yarn is a wrapped yarn, comprising flame-retardant viscose fiber as the core layer and high-filament (F) FDY flame-retardant polyester filament wrapped around the flame-retardant viscose fiber. The high-filament FDY flame-retardant polyester filament has a fineness of 10-20D and an F number > 25, meaning that the fineness of each filament in the high-filament FDY flame-retardant polyester filament is < 0.8D. More preferably, the high-filament FDY flame-retardant polyester filament has a fineness of 15D and an F number of 30, meaning that the fineness of each filament in the high-filament FDY flame-retardant polyester filament is 0.5D. Under these conditions, the finer filaments can create capillary action, allowing the head oil to be rapidly introduced into the intermediate layer after contacting the flame-retardant polyester filaments on the surface of the wrapped yarn.

[0033] The inner layer yarn is a ply yarn of DTY flame-retardant polyester filament and FDY flame-retardant polyester filament. With this configuration, when the inner layer yarn is washed with hot water, the DTY flame-retardant polyester filament shrinks, while the FDY flame-retardant polyester filament does not shrink, thus forming partial loops in the inner layer 3, providing a certain degree of physical spatial barrier. Simultaneously, the fineness of both the DTY and FDY flame-retardant polyester filaments is 40-60D, and the F number is 20-30, meaning that the fineness of each filament in both the DTY and FDY flame-retardant polyester filaments ranges from 1.5 to 3D; preferably, the fineness of both the DTY and FDY flame-retardant polyester filaments is 50D, the F number is 25, and the fineness of each filament in both the DTY and FDY flame-retardant polyester filaments is 2D. Under these conditions, the capillary effect of each filament in the inner yarn is very small, making it difficult for water and oil to pass through, thus further improving the barrier effect.

[0034] In the intermediate layer 2, the mass ratio of kapok fiber to flame-retardant viscose fiber is 4:6 to 7:3, and the main body length of the kapok fiber is 14 to 16 mm. This arrangement achieves better absorption, allowing the abundant kapok fiber in the intermediate layer 2 to efficiently absorb the hair oil introduced into it, while the small amount of flame-retardant viscose fiber further absorbs any moisture not fully absorbed by the flame-retardant viscose fiber in the surface layer. Furthermore, the short-fiber kapok fiber length, combined with the large amount of short-fiber kapok fibers, makes the yarn structure easily disintegrate and fully dispersed between the surface layer 1 and the inner layer 3, thus better absorbing the hair oil introduced into the surface layer 1 and improving absorption efficiency.

[0035] The outer layer yarn has a count of 40-60S / 2, a warp density of 140-180 ends / inch, and a weft density of 90-120 ends / inch; the inner layer yarn has a count of 40-60D / 2, a warp density of 110-120 ends / inch, and a weft density of 80-90 ends / inch. This arrangement ensures that both the outer layer 1 and the inner layer 3 have high warp and weft densities, preventing the escape of the flame-retardant viscose fiber or kapok fiber filled in the middle layer 2, and also preventing the seepage of hair oil.

[0036] This invention also provides a method for preparing a flame-retardant fabric that prevents hair oil penetration, comprising the following steps:

[0037] S1. Determine the material and structure of the outer layer yarn, inner layer yarn, and middle layer yarn; determine the weave structure and splicing method of the outer and inner layers, and design the machine layout diagram;

[0038] S2. Weave the fabric on the loom according to the loom drawing to obtain the woven fabric;

[0039] S3. The woven fabric is sequentially washed with water and air, and the surface layer 1 is brushed to obtain a flame-retardant fabric that is resistant to hair oil penetration.

[0040] In step S1, the materials of the outer and inner layer yarns are the same as those in the aforementioned anti-hair oil penetration flame-retardant fabric, and will not be repeated here. The middle layer yarn is a wrapped yarn, including flame-retardant viscose fiber, kapok fiber, and water-soluble vinylon fiber as the core layer, as well as water-soluble vinylon fiber wrapped around the core layer. The total amount of water-soluble vinylon fiber accounts for 40-60% of the mass fraction of the middle layer yarn. Based on this, during subsequent washing, by setting the washing temperature higher than the dissolution temperature of the water-soluble vinylon fiber, the water-soluble vinylon fiber can be dissolved, thereby disintegrating the middle layer yarn. Combined with the subsequent air washing process, the short-fibered kapok fibers in the middle layer yarn are further dispersed in the relatively independent area formed between the outer and inner layers, forming a filling layer to effectively absorb the introduced hair oil.

[0041] The water-soluble vinylon fiber is preferably 150D water-soluble vinylon with a dissolution temperature of 45℃; the washing temperature in step S3 is preferably 80-90℃. Under these conditions, washing not only allows the water-soluble vinylon to dissolve completely, but also causes the DTY flame-retardant polyester filaments in the inner layer yarn to shrink due to heat sensitivity. This further shrinks the already high warp and weft density of the inner layer 3, making it even tighter. The coarser inner layer monofilaments cannot form effective capillary action, making it difficult for water and oil to pass through, thus forming the first layer of physical isolation. At the same time, the difference in shrinkage performance between DTY flame-retardant polyester filaments and FDY flame-retardant polyester filaments will also form some loops in the inner layer, forming a second layer of physical isolation, an arched layer. Under the dual physical isolation effect, it can achieve a good effect of preventing hair oil penetration. Furthermore, although the inner layer 3 can effectively prevent scalp oil penetration, it is still a fabric structure with straight and irregular gaps inside, which can provide effective ventilation channels. While preventing scalp oil from seeping out, it can still make the fabric breathable.

[0042] In step S1, the weave structure of the outer layer 1 and the inner layer 3 is one of plain weave, twill weave, or satin weave, which can be selected according to actual needs. The connection method between the outer layer 1 and the inner layer 3 is one of inner warp to outer weft, outer warp to inner weft, or a combined connection. In some embodiments of the present invention, the inner warp to outer weft method is used, so that the inner layer warp yarns and the outer layer weft yarns are connected, forming independent areas between the outer layer 1 and the inner layer 3, so that the intermediate layer 2 can be fully dispersed and filled.

[0043] The roughening process performed on the surface layer 1 in step S3 can further improve the efficiency of moisture absorption and the efficiency of oil conduction.

[0044] The flame-retardant fabric prepared based on the method provided by this invention can effectively prevent the penetration of hair oil while ensuring breathability. It can be applied to products that come into contact with hair, such as hats, clothing collars, and pillowcases, and is especially suitable for protective helmets with shells.

[0045] The following detailed description, with reference to specific embodiments, illustrates the anti-oil penetration flame-retardant fabric and its preparation method provided by the present invention.

[0046] Example 1

[0047] This embodiment provides a method for preparing a flame-retardant fabric that prevents hair oil penetration, comprising the following steps:

[0048] S1. Flame-retardant viscose fiber is used as the core layer, and 15D / 30F polyester is used as the wrapping layer. The Siro-spun yarn is used as the outer layer yarn. The core layer consists of 15mm long kapok fiber, flame-retardant viscose fiber, and water-soluble vinylon fiber (mass ratio 7:3:10). The wrapping layer consists of 150D water-soluble vinylon with a melting temperature of 45℃. The total mass of water-soluble vinylon in the core layer and wrapping layer accounts for 60% of the total mass of the intermediate layer yarn. The Siro-spun yarn is used as the weft yarn, i.e., the intermediate layer yarn. 50D / 25F DTY flame-retardant polyester filament and 50D / 25F FDY flame-retardant polyester filament are made into a ply yarn as the inner layer yarn.

[0049] S2, according to Figure 2 The fabric is woven using the diagram shown. The outer layer yarn has a count of 50S / 2, a warp density of 160 ends / inch, and a weft density of 100 ends / inch. The middle layer yarn has a count of 20S / 1, a weft density of 70 ends / inch. The inner layer yarn has a count of 50D / 2, a warp density of 120 ends / inch, and a weft density of 90 ends / inch.

[0050] S3. The obtained woven fabric is first washed with hot water at a temperature of 85℃; after the hot water wash, it is washed with air washing equipment and the surface is brushed to obtain a flame-retardant fabric that is resistant to hair oil penetration.

[0051] Through the above method, this embodiment obtains a flame-retardant fabric that prevents scalp oil penetration, comprising an outer layer 1, an inner layer 3, and an intermediate layer 2 filled between the outer layer 1 and the inner layer 3. The outer layer 1 and the inner layer 3 are woven from outer layer yarns and inner layer yarns, respectively. During the weaving process, the inner layer warp yarns and the outer layer weft yarns are connected to form relatively independent areas, while the intermediate layer yarns are fixed. After hot water washing, the water-soluble vinylon in the intermediate layer yarns dissolves, the intermediate layer yarns disintegrate, and under the action of air washing, the short-fibered kapok fibers are fully dispersed in the relatively independent areas formed between the outer layer 1 and the inner layer 3, achieving a good filling effect to absorb scalp oil. Furthermore, during the hot water washing process, the DTY flame-retardant polyester filaments in the inner layer yarn shrink, causing the inner layer 3, which is already woven with a high warp and weft density, to shrink even more tightly. The coarser inner layer monofilaments cannot form an effective capillary effect, making it difficult for water and oil to pass through, thus forming the first layer of physical isolation. The non-shrinking FDY flame-retardant polyester filaments form partial loops, forming the second layer of physical isolation, the arched layer, which achieves the effect of double physical isolation.

[0052] The performance of the anti-oil penetration flame-retardant fabric prepared in this embodiment is compared using two indicators: anti-penetration performance and breathability performance.

[0053] The anti-permeability test method is as follows: Lay the fabric flat on the test frame. Using a dropper, continuously drip 5 drops of peanut oil (1 ml each) from 2 cm above the fabric. After dripping all the oil, drip 5 drops of water (1 ml each). Start timing after dripping all the oil. After 30 seconds, take photos of the front and back of the fabric. Use image processing software to calculate the oil diffusion area (S²) on the front of the fabric. 正面 ) and the diffusion area of ​​the reverse oil (S) 反面 Then calculate the permeability using the formula: Permeability L = (S 反面 / S 正面 )*100%.

[0054] The fabric air permeability test was conducted according to the standard GB / T 5453-1997 "Regulations on Air Permeability of Textile Fabrics". The air permeability of the fabric was tested using a YG461E air permeability tester (Wenzhou Fangyuan Instrument Co., Ltd.).

[0055] After testing according to the above method, the test results of the sample in Example 1 were: permeability 0%; air permeability 46.77 mm / s.

[0056] Examples 2-3 and Comparative Example 1

[0057] Examples 2-3 and Comparative Example 1 respectively provide a method for preparing a flame-retardant fabric that prevents hair oil penetration. Compared with Example 1, the only difference is that the mass ratio between kapok fiber and flame-retardant viscose fiber in the middle layer is changed. The other steps and parameters are the same as in Example 1, and will not be repeated here.

[0058] The mass ratio of kapok fiber to flame-retardant viscose fiber in the middle layer of the anti-oil penetration flame-retardant fabrics prepared in Examples 2-3 and Comparative Example 1, as well as the performance test results of the fabrics, are shown in Table 1.

[0059] Table 1. Mass ratio of kapok fiber to flame-retardant viscose fiber and fabric performance in Examples 2-3 and Comparative Example 1.

[0060]

[0061]

[0062] Table 1 shows that the higher the kapok fiber content, the stronger the oil absorption capacity; the more flame-retardant viscose fiber, the stronger the water absorption capacity. The reagent used to test the permeability was a 1:1 oil-to-water ratio. Kapok has a strong oil absorption capacity, so even when the kapok fiber content is as low as 40%, it can still completely absorb the oil. The flame-retardant viscose is responsible for absorbing moisture. In addition, the coil insulation formed inside the inner fabric prevents water and oil from penetrating to the inner layer, so the permeability is 0%. When the kapok content decreases to 10%, it cannot absorb enough oil, and the unabsorbed oil gradually penetrates to the bottom layer, reaching a permeability of 11.3%. The more kapok fibers, the less breathable the air due to the fluffy nature of the kapok fibers, which also indicates that they can absorb more oil after being dispersed.

[0063] Comparative Example 2

[0064] This comparative example provides a method for preparing a flame-retardant fabric that prevents hair oil penetration. Compared with Example 2, the only difference is that the water-soluble vinylon in the middle layer yarn is replaced with non-water-soluble flame-retardant polyester fiber. The fineness of the fiber is the same as that of the water-soluble vinylon. The remaining steps and parameters are the same as those in the example, and will not be repeated here.

[0065] The anti-permeability and breathability of the flame-retardant fabric prepared in this comparative example were tested, and the results were: permeability 37.54%; breathability 236.81 mm / s. Compared with Example 2, it can be seen that if water-soluble vinylon is not used in the middle layer, the middle layer yarn will not disintegrate during hot water washing, and the kapok fibers cannot be fully dispersed to absorb the oil, which will lead to a significant increase in permeability.

[0066] Comparative Example 3

[0067] This comparative example provides a method for preparing a flame-retardant fabric that prevents hair oil penetration. Compared with Example 2, the only difference is that the 15D / 30F flame-retardant polyester yarn in the surface yarn is replaced with 15D / 15F flame-retardant polyester yarn. The remaining steps and parameters are the same as in the example, and will not be repeated here.

[0068] The anti-permeability and breathability of the flame-retardant fabric prepared in this comparative example were tested. The results were: permeability 0%; breathability 48.33 mm / s. Compared with Example 2, it can be seen that if a coarser flame-retardant polyester filament is used as the surface yarn, although it can achieve the anti-permeability effect, it will affect the breathability of the fabric.

[0069] Comparative Examples 4-6

[0070] Comparative Examples 4-6 provide a method for preparing a flame-retardant fabric that prevents head oil penetration. Compared with Example 2, the only difference is that the type and specifications of polyester filaments in the inner layer yarn are changed. The other steps and parameters are the same as those in the Example, and will not be repeated here.

[0071] In Comparative Example 4, the inner layer yarn is a plied yarn formed by two strands of 50D / 25F DTY flame-retardant polyester filaments; in Comparative Example 5, the inner layer yarn is a plied yarn formed by two strands of 50D / 25F FDY flame-retardant polyester filaments; and in Comparative Example 6, the inner layer yarn is a plied yarn formed by two strands of 50D / 50F DTY flame-retardant polyester filaments and 50D / 50F FDY flame-retardant polyester filaments.

[0072] The test results of the anti-permeability and breathability of the anti-oil permeability flame-retardant fabrics prepared in Comparative Examples 4 to 6 are shown in Table 2.

[0073] Table 2 shows the performance test results of the anti-oil penetration flame-retardant fabrics prepared in Comparative Examples 4-6.

[0074] Comparative Example Penetration rate (%) Breathability (mm / s) Comparative Example 4 2.71 40.39 Comparative Example 5 5.75 423.47 Comparative Example 6 1.90 44.32

[0075] As shown in Table 2, the use of DTY filaments in the inner layer fabric plays a crucial role in reducing the porosity of the inner layer fabric and improving the prevention of hair oil penetration. Comparative Example 5, which did not use DTY filaments, had the highest penetration rate. Although Comparative Example 4 used DTY filaments, the lack of FDY filaments prevented the formation of an arched layer in the inner layer. In contrast, the formation of the arched layer in Example 2 provides an effective physical barrier, and the use of thicker fibers with weaker capillary effect further enhances this barrier. Therefore, the penetration rates of the inner layer fibers used in Comparative Examples 4 and 5 are higher than those in Example 2. While Comparative Example 6 used both DTY flame-retardant polyester filaments and FDY flame-retardant polyester filaments, the fibers used were 1 denier each, resulting in a greater capillary effect compared to Example 2, thus weakening the anti-penetration ability.

[0076] Example 4 and Comparative Example 7

[0077] Example 4 and Comparative Example 7 respectively provide a method for preparing a flame-retardant fabric that prevents head oil penetration. Compared with Example 2, the only difference is that the warp and weft densities of the inner layer yarns are changed. The other steps and parameters are the same as those in the example, and will not be repeated here.

[0078] In Example 4, the warp density of the inner layer yarn is 110 threads / inch and the weft density is 80 threads / inch; in Comparative Example 7, the warp density of the inner layer yarn is 90 threads / inch and the weft density is 70 threads / inch.

[0079] The test results of the anti-permeability and breathability of the anti-oil permeability flame-retardant fabrics prepared in Example 4 and Comparative Example 7 are shown in Table 3.

[0080] Table 3. Performance test results of the anti-oil penetration flame-retardant fabrics prepared in Example 4 and Comparative Example 7.

[0081] Examples / Comparative Examples Penetration rate (%) Breathability (mm / s) Example 4 0 59.03 Comparative Example 7 0.9 90.55

[0082] As shown in Table 3, the density of the inner fabric directly affects the permeability. A decrease in the warp and weft density of the inner fabric increases air permeability but also leads to an increase in permeability. In Comparative Example 7, although the decrease in the warp and weft density of the inner layer increases the risk of permeation, the cotton and flame-retardant adhesive in the middle layer provide storage, and the arched layer near the middle layer of the inner fabric provides physical isolation. Thus, although the permeability is higher than that of Example 2, it is only 0.9%, which is still considered a low permeability.

[0083] In summary, this invention provides a flame-retardant fabric that prevents scalp oil penetration and its preparation method. The flame-retardant fabric includes a surface layer, an inner layer, and an intermediate layer filling the space between the surface and inner layers. The surface and inner layers are woven from surface yarns and inner yarns, respectively, and are connected by a bonding structure. The surface yarns include flame-retardant viscose fiber and flame-retardant polyester filament, the inner layer yarns include DTY flame-retardant polyester filament and FDY flame-retardant polyester filament, and the intermediate layer includes flame-retardant viscose fiber and kapok fiber. During the preparation of this flame-retardant fabric, after the woven fabric is obtained, it undergoes hot water washing and air washing. Through the above methods, this invention can utilize the synergistic effect of the materials and structures of the three layers—the surface layer, the intermediate layer, and the inner layer—to guide scalp oil in contact with the surface layer into the intermediate layer for absorption and storage, and utilize the inner layer for physical isolation, achieving the functions of guiding, absorbing, storing, and isolating scalp oil, effectively preventing scalp oil penetration while ensuring the fabric's breathability.

[0084] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A flame-retardant fabric that prevents hair oil penetration, characterized in that: It includes an outer layer, an inner layer, and an intermediate layer filling between the outer layer and the inner layer; the outer layer and the inner layer are woven from outer layer yarn and inner layer yarn respectively, and the outer layer and the inner layer are connected by a bonding structure; the outer layer yarn includes flame-retardant viscose fiber and flame-retardant polyester filament, the inner layer yarn includes DTY flame-retardant polyester filament and FDY flame-retardant polyester filament, and the intermediate layer includes flame-retardant viscose fiber and kapok fiber. The middle layer yarn is a wrapped yarn, including flame-retardant viscose fiber, kapok fiber and water-soluble vinylon fiber as the core layer, and water-soluble vinylon fiber wrapped around the core layer; After the fabric is washed and air-washed, the DTY flame-retardant polyester filaments and FDY flame-retardant polyester filaments contained in the inner fabric form a high-density fabric structure containing loops, which can produce a double physical isolation effect and prevent the seepage of hair oil stored in the kapok fiber.

2. The flame-retardant fabric against hair oil penetration according to claim 1, characterized in that: The outer yarn is a wrapped yarn, comprising flame-retardant viscose fiber as the core layer and high-F-number FDY flame-retardant polyester filament wrapped around the flame-retardant viscose fiber; the fineness of the high-F-number FDY flame-retardant polyester filament is 10-20D, and the F-number is >25.

3. The flame-retardant fabric against hair oil penetration according to claim 2, characterized in that: The high-F-number FDY flame-retardant polyester yarn has a fineness of 15D and an F-number of 30.

4. The flame-retardant fabric against hair oil penetration according to claim 1, characterized in that: The inner layer yarn is a ply yarn of DTY flame-retardant polyester filament and FDY flame-retardant polyester filament; the fineness of both DTY flame-retardant polyester filament and FDY flame-retardant polyester filament is 40-60D, and the F number is 20-30.

5. The flame-retardant fabric against hair oil penetration according to claim 4, characterized in that: Both the DTY flame-retardant polyester filament and the FDY flame-retardant polyester filament have a fineness of 50D and an F number of 25.

6. The flame-retardant fabric against hair oil penetration according to claim 1, characterized in that: In the intermediate layer, the mass ratio of kapok fiber to flame-retardant viscose fiber is 4:6 to 7:3, and the main body length of the kapok fiber is 14 to 16 mm.

7. The flame-retardant fabric against hair oil penetration according to claim 1, characterized in that: The outer layer yarn has a count of 40-60S / 2, a warp density of 140-180 ends / inch, and a weft density of 90-120 ends / inch; the inner layer yarn has a count of 40-60D / 2, a warp density of 110-120 ends / inch, and a weft density of 80-90 ends / inch.

8. A method for preparing a flame-retardant fabric that prevents hair oil penetration as described in any one of claims 1 to 7, comprising the following steps: S1. Determine the material and structure of the outer layer yarn, inner layer yarn, and middle layer yarn; determine the weave structure and splicing method of the outer and inner layers, and design the machine layout diagram; S2. Weave the fabric on the loom according to the loom drawing to obtain the woven fabric; S3. The woven fabric is sequentially washed with water and air, and the surface is brushed to obtain a flame-retardant fabric that is resistant to hair oil penetration.

9. The method for preparing the flame-retardant fabric against head oil penetration according to claim 8, characterized in that: In step S3, the temperature of the water washing is higher than the dissolution temperature of the water-soluble vinylon fiber.

10. The method for preparing the flame-retardant fabric against head oil penetration according to claim 9, characterized in that: The temperature of the water wash is 80-90℃.

11. The method for preparing the flame-retardant fabric against head oil penetration according to claim 8, characterized in that: In step S1, the surface and inner layers are constructed using one of the following weave structures: plain weave, twill weave, or satin weave.

12. The method for preparing the flame-retardant fabric against head oil penetration according to claim 8, characterized in that: In step S1, the connection method between the outer layer and the inner layer is one of the following: inner warp to outer weft, outer warp to inner weft, or a combination of both.

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