Flocking denim fabric and manufacturing method thereof

Abstract

The invention discloses a flocked jean fabric and a manufacturing method of the flocked jean fabric, and belongs to the field of after-finishing of jean fabrics. The cloth blank is sequentially subjected to singeing treatment, tentering treatment, desizing treatment, alkali soaking treatment, first-time preshrinking treatment, plasma etching, second-time preshrinking treatment, oxidation treatment, wool removal enzyme treatment and electrostatic flocking treatment. According to the method, damage to the strength of the fabric is small, the yarn structure loosened during tentering is tightened again before etching through first-time preshrinking, the plasma action is mainly concentrated on the surface layer of the fabric, it is avoided that the strength is affected due to deep damage of fibers, the yarn structure loosened after plasma etching is tightened again through second-time preshrinking, the stability of the cloth cover is recovered, and the fabric quality is improved. Further loosening of the structure caused by subsequent ozone oxidation and other steps is inhibited, an ideal flocking substrate with a stable structure and an activated surface is constructed by the whole process, the permeability of an adhesive and the adhesion fastness of fluff are remarkably improved, and less fluff falls off after water washing and antique finishing.

Description

Technical Field

[0001] This invention relates to a flocked denim fabric and its manufacturing method, belonging to the field of denim fabric finishing. Background Technology

[0002] Denim clothing has always stood the test of time in the fashion world, becoming an irreplaceable trend element. With societal development, people's pursuit of denim clothing has expanded beyond just design; they now place greater emphasis on the fabric's style, functionality, and comfort. Therefore, traditional denim fabrics are gradually failing to meet people's individual needs, requiring industry professionals to continuously innovate in technology and processes to endow denim fabrics with new properties.

[0003] Among the newly developed denim fabrics, flocked denim is becoming increasingly popular due to its comfortable feel. The denim garment production process includes spinning, weaving, finishing, garment making, and washing / distressing. Flocking is a finishing process that adds a layer of fluff to the fabric surface. In flocking, an adhesive is first applied to the fabric surface, and then electrostatic flocking is used to attach the fluff to the fabric. However, denim garments require washing / distressing, which typically involves treatments such as enzyme bleaching, chlorine bleaching, and oxygen bleaching. If the flocking is not sufficiently bonded to the fabric, the washing / distressing environment can cause some of the flocking to fall off, affecting the garment's quality.

[0004] The existing finishing process for flocked fabrics is: singeing - desizing - setting (elastic) - pre-shrinking - flocking. In actual production, it has been found that the adhesion between the flock on the fabric surface and the raw fabric is not strong enough when following this process. For ordinary woven fabrics, the flocking effect is acceptable, but for denim fabrics, after the necessary washing and aging treatments for denim garments, too much flock falls off, resulting in uneven flocking on the fabric. Therefore, the existing technology needs improvement. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a method for making flocked denim fabric, which can make the flocking more firmly adhered to the fabric blank and less fall off after washing and aging, and provides a flocked denim fabric accordingly.

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] A method for manufacturing flocked denim fabric, wherein the fabric blank includes interwoven warp and weft yarns, wherein the cotton content of the warp yarns is above 30%, and the fabric blank undergoes the following processes in sequence: singeing, stretching, desizing, alkali soaking, first pre-shrinking, plasma etching, second pre-shrinking, oxidation, depilatory enzyme treatment, and electrostatic flocking. The oxidation treatment involves placing the fabric soaked in hydrogen peroxide in an ozone atmosphere.

[0008] The flocked denim fabric manufacturing method provided in this application enhances the fabric surface treatment and dimensional stability through a specific sequence of steps, thereby improving the flock bonding strength to resist washing erosion. The singeing process removes surface impurities and lint, providing a clean base for subsequent steps; the stretching process increases the gap between warp and weft yarns, facilitating thorough desizing; the desizing process removes sizing material, exposing the fiber surface and enhancing its response to chemical treatments; the alkali treatment uses an alkaline solution to further remove sizing material and other impurities, making desizing more thorough and uniform, and improving fiber activity; the first pre-shrinking process re-tightens the warp and weft yarns, reducing yarn count and ensuring that subsequent fiber structure disruption primarily affects the fabric surface without compromising fabric strength; plasma etching lightly disrupts the fabric surface fibers, exposing… More active groups that can combine with adhesives enhance adhesive adhesion; after the fabric surface is damaged by plasma, it becomes loose, and the second pre-shrinking treatment tightens the interlacing between warp and weft yarns again; the oxidation treatment is based on hydrogen peroxide immersion followed by ozone atmosphere, hydrogen peroxide pretreatment promotes deep ozone oxidation, reduces cotton fiber crystallinity and activates surface chemical groups; the lint removal enzyme treatment removes loose fiber fuzz formed by plasma etching and oxidation treatment, providing a uniform flocking base surface; the electrostatic flocking treatment ensures directional implantation and firm bonding of flocking through adhesive coating and high voltage electrostatics.

[0009] Furthermore, the warp yarn is pure cotton yarn or a blended yarn containing cotton fibers. In addition to cotton fibers, the blended yarn also includes one or more natural fibers and regenerated cellulose fibers. Natural fibers include wool, silk, hemp fibers, etc., while regenerated cellulose fibers include Tencel, Modal, viscose, bamboo fiber, etc.

[0010] Preferably, the warp yarn has a cotton fiber content of 50% to 100%, more preferably 65% ​​to 100%.

[0011] Furthermore, in the tenter frame process, the tenter frame belt is overfed by 25% to 35%, and the machine speed is 50m / min to 60m / min.

[0012] This stretching process relaxes fabric tension and effectively widens the gaps between yarns, making it easier for subsequent desizing enzymes, alkali solutions, and adhesives to penetrate. The matching machine speed can avoid excessive tension and deformation of the fabric surface caused by excessive speed, ensuring uniform stretching and a smooth fabric surface, thus creating conditions for subsequent processing and flocking.

[0013] Furthermore, in the alkali treatment, the fabric is soaked in a caustic soda solution of 10 g / L to 15 g / L at a temperature of 60°C to 70°C for 8 min to 15 min.

[0014] This alkali treatment can effectively swell fibers, disrupt the surface structure, make the fibers softer, and improve capillary action; it also helps to further remove sizing residues and improve the cleanliness of the fabric surface; and it increases the hydrophilicity and reactivity of the fiber surface, enhancing the penetration and adhesion of adhesives.

[0015] Furthermore, the requirements for the first pre-shrinking treatment are as follows: vehicle speed 15m / min~25m / min, rubber blanket compression degree of the pre-shrinking machine 12%~14%, rubber blanket temperature of the pre-shrinking machine 120℃~140℃, and blanket drying cylinder temperature of the pre-shrinking machine 120℃~140℃; the requirements for the second pre-shrinking treatment are as follows: vehicle speed 15m / min~25m / min, rubber blanket compression degree of the pre-shrinking machine 15%~18%, rubber blanket temperature of the pre-shrinking machine 120℃~140℃, and blanket drying cylinder temperature of the pre-shrinking machine 120℃~140℃.

[0016] The first pre-shrinking process allows the warp and weft yarns to re-interweave tightly after the sizing is completely removed, reducing the space for displacement between yarns. This helps limit the plasma treatment area to the fabric surface, preventing deep damage and creating a gradient liquid absorption effect from the surface to the core of the yarns, which is beneficial for the subsequent application of the adhesive. After plasma treatment, the fabric will have some looseness. The second pre-shrinking process promptly tightens the fabric structure, restoring its overall stability and reducing the exposure of the fabric's interior during oxidation treatment, thus mitigating the negative impact of oxidation on fabric strength. Ultimately, this ensures that the adhesive penetrates deeply without spreading, is applied evenly, and adheres firmly, greatly improving the fabric's dimensional stability and durability.

[0017] Furthermore, the requirements for plasma etching are: under an oxygen atmosphere, power of 50W to 100W, pressure of 50Pa to 200Pa, and processing time of 30s to 120s.

[0018] By utilizing plasma reactive oxygen free radicals, the surface fibers of the fabric are lightly etched, exposing hydrophilic groups such as hydroxyl and carboxyl groups; this enhances the adsorption and chemical bonding ability of the fabric surface to the adhesive, improving the fastness of subsequent electrostatic flocking; due to the limitation of the first pre-shrinking, its effect is controlled within the surface layer of the fabric, avoiding strong damage.

[0019] Furthermore, in the oxidation treatment, after the fabric is wetted with 0.5% hydrogen peroxide, the fabric is placed in an empty tank, and ozone is introduced into the tank at a rate of 0.5L / min to 1.5L / min. The fabric is exposed to the ozone atmosphere for 2 to 4 minutes.

[0020] Pre-wetting with hydrogen peroxide enhances the deep oxidation effect of ozone; ozone breaks down the crystalline regions of cotton fibers, making their surface more porous and easier to adsorb adhesives, thus enhancing the adhesion of flocked areas on the fabric surface; when used in combination with a second pre-shrinking process, it helps to form a structural gradient that gradually weakens from the surface to the interior, allowing the adhesive to penetrate in a controlled and uniform manner, resulting in enhanced and stable bonding strength.

[0021] Furthermore, in the hair removal enzyme treatment, the fabric is soaked in a hair removal enzyme solution of 1g / L to 2g / L for 5min to 10min.

[0022] The aforementioned hair removal enzyme treatment can remove free hair and loose fibers formed by plasma and oxidation treatment; it avoids weak fiber residue affecting the uniformity of the bonding between the adhesive and the fabric, and creates a cleaner and smoother surface.

[0023] Furthermore, in the electrostatic flocking process, the adhesive used is a polyurethane adhesive, and the coating amount is 150 g / m². 2 ~300g / m 2 The voltage for electrostatic flocking is 50kV~75kV, and the vehicle speed is 15m / min~30m / min.

[0024] Polyurethane adhesive possesses excellent flexibility and wash fastness, preventing the coating from becoming brittle. A high-voltage electrostatic field ensures vertically aligned and densely embedded fibers. Appropriate machine speed and coating amount balance adhesion and fabric smoothness, preventing fiber shedding due to insufficient adhesive layer thickness or uneven distribution. Overall, it enhances the wash resistance and appearance quality of the finished product. The adhesive penetrates deeper and adheres more firmly after multi-step pretreatment; high electrostatic voltage ensures vertically embedded and densely distributed fibers; effectively resisting fiber shedding caused by high-intensity water erosion during subsequent washing and aging processes.

[0025] Secondly, this application provides a flocked denim fabric, made by the flocked denim fabric manufacturing method described in the first aspect.

[0026] This flocked denim fabric has a strong pile, is resistant to washing and aging, and has a comfortable feel. It meets the washing and aging process requirements of the denim industry, significantly reduces the shedding problem caused by washing and aging, improves the flocking uniformity and stability of flocked products, and meets the quality requirements of high-end clothing.

[0027] Furthermore, the pile is made of recycled dyed fibers, including natural fibers and chemical fibers. The natural fibers include cotton, linen, silk, wool or cashmere, and the chemical fibers include Tencel, Modal, viscose, polyester or nylon, which is conducive to achieving green environmental protection and resource recycling.

[0028] The beneficial effects of this invention are: the flocked denim fabric manufacturing method of this invention causes less damage to the fabric strength. The first pre-shrinking tightens the yarn structure that has loosened during stretching before etching, so that the plasma effect is mainly concentrated on the surface layer of the fabric, avoiding damage to the deep fiber layer that affects the strength. The second pre-shrinking tightens the yarn structure that has become loose after plasma etching, restores the stability of the fabric surface, and inhibits the further loosening of the structure caused by subsequent ozone oxidation and other steps. The overall process creates an ideal flocked base with a stable structure and activated surface, significantly improving the penetration of adhesive and the adhesion of flock. After washing and aging, there is less flock shedding. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the etching process of the yarn by plasma when the yarn is relaxed.

[0030] Figure 2 This is a schematic diagram of the etching process of the yarn by plasma after pre-shrinking.

[0031] Reference numerals: 1. Plasma; 2. Etched area; 3. Yarn. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure are described clearly and completely below. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this invention.

[0033] It should be understood that, without conflict, any and all embodiments of the present invention can be combined with technical features of any other embodiment or multiple other embodiments to obtain other embodiments. The present invention includes such combinations to obtain other embodiments.

[0034] Unless otherwise specified, all technical and scientific terms used herein have the standard meaning in the field to which the claimed subject matter pertains. Where multiple definitions exist for a term, the definition herein shall prevail.

[0035] As people's pursuit of fashion increases, they buy new clothes and discard old ones, resulting in a large amount of discarded clothing. Although some old clothes are currently recycled and reused, the process is complex and requires strict sorting. For synthetic fiber clothing, multiple destructive processes are needed to break it down into short fibers, which are then dissolved chemically to extract monomers before polymerization and spinning to form recycled synthetic short fibers. The manufacturing process is extremely complex and requires high precision, leading to high production costs. Due to the significant limitations on the recycling and reuse of old clothes, most clothes are simply discarded, resulting in a large waste of resources. Furthermore, clothing made of natural fibers or regenerated cellulose fibers mainly undergoes destructive processing before being blended with normal fibers. Because the properties of the recycled fibers are significantly damaged, the blending ratios are highly demanding, further limiting the recycling and reuse of old clothes.

[0036] This application provides a method for manufacturing flocked denim fabric, comprising the following steps in sequence: singeing, stretching, desizing, alkali soaking, first pre-shrinking, plasma etching, second pre-shrinking, oxidation, depilatory enzyme treatment, and electrostatic flocking. The fabric blank comprises interwoven warp and weft yarns, with the cotton content of the warp yarns exceeding 30%. The oxidation treatment involves placing the fabric, which has been soaked in hydrogen peroxide, in an ozone atmosphere.

[0037] These steps work together to singe the fabric surface, providing a good foundation for subsequent processes.

[0038] Tensile treatment facilitates desizing, making the fabric softer. Alkali treatment enhances fiber stability and further removes sizing.

[0039] The first pre-shrinking process tightens the interlacing of warp and weft yarns, reducing looseness between yarns. If plasma etching is performed without pre-shrinking after the stretching process, such as... Figure 1 As shown, the spacing between yarns 3 is relatively large. Under the attack of plasma 1, the etched area 2 on yarn 3 is large, and more of the sides of yarn 3 (the parts facing adjacent yarns) will be etched. After the first pre-shrinking treatment, as shown... Figure 2 As shown, the spacing between yarns 3 is small. Under the attack of plasma 1, the etched area 2 on yarn 3 is small, and the sides of yarn 3 will be etched less, so that plasma etching occurs only on the fiber surface as much as possible, thus suppressing the decrease in fabric strength.

[0040] Plasma etching disrupts the fiber structure on the fabric surface, making it easier for subsequent adhesives to penetrate and bond with the fibers. It's important to note that etching does not mean the fibers in etched area 2 shown in the attached diagram of the instruction manual are completely degraded and disappear; rather, it causes the fibers in etched area 2 to become porous, looser, or partially broken.

[0041] After plasma etching, the fabric surface becomes loose. The second pre-shrinking treatment promptly tightens the interlacing between the warp and weft yarns, restores the compactness of the fabric structure, and reduces the exposure of the yarn sides.

[0042] Hair removal enzyme treatment removes the hair that has formed after plasma etching and oxidation.

[0043] Electrostatic flocking completes the flocking process.

[0044] The integrated process effectively solves the problems of weak adhesion between the flock and the fabric and excessive flock loss after washing and aging in existing technologies, significantly improving the quality and performance of flocked denim fabric. The two pre-shrinking treatments work closely with other steps to create a more suitable structure for adhesive adhesion on the fabric surface and reduce the decrease in fabric strength, thereby significantly improving the flock bonding strength and effectively resisting erosion during washing and aging. This solves the problem of easy flock loss in existing technologies and greatly improves the quality and performance of flocked denim fabric.

[0045] Singeing treatment: The fabric is singeed using a singeing machine. The side to be flocked is singeed on one side only. The singeing temperature is 300℃~500℃ and the speed is 60m / min~85m / min. This removes the fiber fuzz from the fabric surface and makes the fabric surface relatively smooth.

[0046] Tensoring: The tenter frame's belt is overfed by 25%–35%, and the machine speed is 50m / min–60m / min. This increases the gap between the warp and weft yarns, allowing the desizing enzyme to better act on the sizing on the yarn surface, thus facilitating the thorough removal of sizing from the fabric surface. The fabric becomes relatively soft, which is beneficial for subsequent processing steps. It also facilitates flocking, effectively solving the problem of adhesive penetration hindered by residual sizing on the fabric surface, and addressing the issue of inconsistent flock density caused by incomplete or uneven desizing.

[0047] Desizing treatment: The fabric is desized at a concentration of 8 g / L to 12 g / L, a temperature of 45℃ to 65℃, and a speed of 60 m / min to 80 m / min.

[0048] Alkali treatment: Soak the fabric in a 10g / L to 15g / L caustic soda solution at a temperature of 60℃ to 70℃ for 8 to 15 minutes. This causes the surface fibers of the yarn to swell, resulting in closer contact between the surface fibers. This compresses the inner fibers, making them relatively compact and stable. Simultaneously, the alkali treatment further removes sizing from the fabric surface, resulting in a more thorough and uniform desizing effect. It also removes impurities from the fabric, causing subtle changes in the fiber structure and improving the capillary effect of the fibers.

[0049] First pre-shrinking treatment: machine speed 15m / min~25m / min, rubber blanket compression degree of pre-shrinking machine is 12%~14%, rubber blanket temperature of pre-shrinking machine is 120℃~140℃, and blanket drying cylinder temperature of pre-shrinking machine is 120℃~140℃, so that the warp and weft yarns are relatively tightly interwoven.

[0050] Plasma etching is performed on the side to be flocked: under an oxygen atmosphere, with a power of 50W to 100W, a pressure of 50Pa to 200Pa, and a treatment time of 30s to 120s, the microstructure of the fibers is destroyed, and active groups are exposed. This allows the adhesive to penetrate the fabric surface better during the flocking process, resulting in a more uniform coating of the adhesive on the fabric.

[0051] Second pre-shrinking treatment: machine speed 15m / min~25m / min, rubber blanket compression degree of pre-shrinking machine is 15%~18%, rubber blanket temperature of pre-shrinking machine is 120℃~140℃, and blanket drying cylinder temperature of pre-shrinking machine is 120℃~140℃. This makes the warp and weft yarns interweave relatively tightly, which is convenient for subsequent processing and helps to achieve a gradient change in the degree of damage to the fabric fibers from the surface to the inside.

[0052] Oxidation Treatment: In a tank the size of a typical dyeing and sizing machine, the fabric is first soaked in 0.5% (by volume) hydrogen peroxide and then placed in an empty tank. Ozone is introduced into the tank at a rate of 0.5 L / min to 1.5 L / min for 2 to 4 minutes. The strong oxidizing properties of ozone act on the fibers on the fabric surface, causing minor damage to the fiber structure. This further enhances the fabric's ability to absorb adhesives, allowing the adhesive to adhere better and penetrate deeper into the fabric. This results in more secure fixation of the pile, reducing adhesive buildup on the fabric surface and facilitating the effective utilization of the adhesive.

[0053] Hair removal enzyme treatment: Soak the fabric in a hair removal enzyme solution of 1g / L to 2g / L for 5 to 10 minutes to remove the hair on the surface of the fabric, so that the surface of the fabric is relatively clean. This is beneficial to the flocking adhesive application, so that the uniformity and stability of the adhesive application will not be affected by the fiber hair, and to prevent the fine fiber hair from hindering the implanted flock during high voltage electrostatic flocking.

[0054] Electrostatic flocking treatment: First, apply adhesive to the side of the fabric to be flocked. The adhesive is polyurethane, and the coating amount is 150g / m². 2 ~300g / m 2In the flocking machine, the voltage is 50kV~75kV and the speed is 15m / min~30m / min. The flocking includes natural fibers and chemical fibers. Natural fibers include, but are not limited to, cotton fibers, linen fibers, silk, wool, and cashmere. Chemical fibers include, but are not limited to, Tencel, Modal, viscose, polyester, and nylon. The flocking can be recycled fibers, and the flocking fibers can be dyed fiber hairs.

[0055] Between the depilatory enzyme treatment and electrostatic flocking, the fabric can be dried first to reduce its moisture content. For example, the drying temperature can be 90℃~110℃ and the treatment time can be 20min~30min.

[0056] The above process is roughly as follows: remove the fuzz generated during weaving, increase the gap between yarns, thoroughly desizing with alkaline solution and using the swelling effect of alkaline solution to squeeze the internal fibers of the yarn, reduce the gap between yarns again, plasma etch and destroy the fabric surface, tighten the yarns that have become somewhat loose after destruction, activate the groups on the fabric surface that are used to bond with the adhesive, remove the fiber fuzz formed by plasma etching and oxidation treatment, and electrostatic flocking.

[0057] During the alkali treatment, the inner fibers of the yarn are squeezed to make them relatively compact. Before plasma etching, the fabric is pre-shrinked so that more fibers on the surface are attacked. After the second pre-shrinking, some of the loose fibers are compressed a little more. After oxidation treatment, a gradient absorption effect is formed in which the fabric's absorption capacity becomes stronger from the inside out, while the strength of the yarn does not change significantly.

[0058] Example 1, Comparative Example 1, and Comparative Example 2 were post-processed according to the process steps in Table 1.

[0059] Table 1

[0060]

[0061]

[0062] The fabrics used in Example 1, Comparative Example 1, and Comparative Example 2 were all pure cotton and of the same specifications. The denim fabrics obtained in Example 1, Comparative Example 1, and Comparative Example 2 were subjected to a tear test according to Section 9.2.1 of GB / T 21294-2014, "Test Methods for Physical and Chemical Properties of Clothing". The warp tear result for Example 1 was 0.46 cm, for Comparative Example 1 it was 0.43 cm, and for Comparative Example 2 it was 0.59 cm.

[0063] According to the requirements of FZ / T 13038-2016 "Flocked Yarn-dyed Denim", the flocking fastness of the denim fabrics obtained in Example 1, Comparative Example 1, and Comparative Example 2 was tested. The test method was performed according to GB / T 21196.4 and 6.1.7 of FZ / T 64011-2012. The endpoint of the count was achieving Grade 2 appearance as specified in 6.1.6 of FZ / T 64011-2012. The flocking fastness per count for Example 1 was 5250, for Comparative Example 1 it was 5000, and for Comparative Example 2 it was 3250.

[0064] According to the requirements of FZ / T 13038-2016 "Flocked Yarn-dyed Denim", the dry rubbing color fastness of the denim fabrics obtained in Example 1, Comparative Example 1, and Comparative Example 2 was tested. The result of Example 1 was grade 3-4, Comparative Example 1 was grade 3, and Comparative Example 2 was grade 2-3.

[0065] According to the requirements of FZ / T 13038-2016 "Flocked Yarn-dyed Denim", the unevenness of the pile on the denim fabrics obtained in Example 1, Comparative Example 1, and Comparative Example 2 was scored, and the unevenness defects on the pile surface were evaluated per 100 square meters of fabric. Example 1 and Comparative Example 2 did not show any unevenness issues, while Comparative Example 1 showed one instance of unevenness.

[0066] Multiple denim jackets of the same specifications were made using the fabrics obtained in Example 1, Comparative Example 1, and Comparative Example 2. These denim jackets underwent the same washing and aging process. The unevenness of the pile on the denim jackets was evaluated again. Example 1 did not have any unevenness issues, while Comparative Example 1 and Comparative Example 2 showed a few unevenness defects, with Comparative Example 1 having more than Comparative Example 2.

[0067] The results show that the fabric strength of the embodiments of this application decreased less, the flocking was more stable, and the flocking uniformity was better. Although the flocking firmness and uniformity of Comparative Example 2 were acceptable, the fabric strength was severely damaged. This is because, although plasma and ozone treatments can damage the microstructure of fibers, the fabric of Example 1 underwent a first pre-shrinking treatment after alkali impregnation, followed by plasma treatment. This allowed the plasma to act on the fabric from the surface inwards, gradually reducing the degree of damage. A second pre-shrinking treatment followed by oxidation further reduced the degree of oxidative damage to the fibers from the surface inwards, thus minimizing damage to the fabric strength. The gradual reduction in damage from the outside inwards not only better removes the sizing agent from the fabric surface but also improves the fabric's absorption capacity for adhesives.

[0068] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0069] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for producing flocked denim fabric, characterized in that, The fabric consists of interwoven warp and weft yarns, with the warp yarns containing more than 30% cotton. The fabric undergoes the following processes in sequence: singeing, stretching, desizing, alkali soaking, first pre-shrinking, plasma etching, second pre-shrinking, oxidation, depilatory enzyme treatment, and electrostatic flocking. The oxidation process involves placing the fabric, which has been soaked in hydrogen peroxide, in an ozone atmosphere.

2. The method for producing flocked denim fabric according to claim 1, characterized in that, In the tenter frame process, the tenter frame belt is overfed by 25% to 35%, and the machine speed is 50m / min to 60m / min.

3. The method for producing flocked denim fabric according to claim 1, characterized in that, In the alkali immersion treatment, the fabric is soaked in a caustic soda solution of 10 g / L to 15 g / L at a temperature of 60°C to 70°C for 8 min to 15 min.

4. The method for producing flocked denim fabric according to claim 1, characterized in that, The requirements for the first pre-shrinking treatment are: vehicle speed 15m / min~25m / min, rubber blanket compression degree of the pre-shrinking machine 12%~14%, rubber blanket temperature of the pre-shrinking machine 120℃~140℃, and blanket drying cylinder temperature of the pre-shrinking machine 120℃~140℃; the requirements for the second pre-shrinking treatment are: vehicle speed 15m / min~25m / min, rubber blanket compression degree of the pre-shrinking machine 15%~18%, rubber blanket temperature of the pre-shrinking machine 120℃~140℃, and blanket drying cylinder temperature of the pre-shrinking machine 120℃~140℃.

5. The method for producing flocked denim fabric according to claim 1, characterized in that, The requirements for plasma etching are: under an oxygen atmosphere, power of 50W to 100W, pressure of 50Pa to 200Pa, and processing time of 30s to 120s.

6. The method for producing flocked denim fabric according to claim 1, characterized in that, In the oxidation treatment, the fabric is wetted with 0.5% hydrogen peroxide and then placed in an empty chamber. Ozone is introduced into the chamber at a rate of 0.5L / min to 1.5L / min, and the fabric is exposed to the ozone atmosphere for 2 to 4 minutes.

7. The method for producing flocked denim fabric according to claim 1, characterized in that, In the hair removal enzyme treatment, the fabric is soaked in a hair removal enzyme solution of 1g / L to 2g / L for 5min to 10min.

8. The method for producing flocked denim fabric according to claim 1, characterized in that, In the electrostatic flocking process, the adhesive used is a polyurethane adhesive, and the coating amount is 150 g / m². 2 ~300g / m 2 The voltage for electrostatic flocking is 50kV~75kV, and the vehicle speed is 15m / min~30m / min.

9. A flocked denim fabric, characterized in that, Made by the flocked denim fabric manufacturing method according to any one of claims 1 to 8.

10. The flocked denim fabric according to claim 9, characterized in that, The pile is made of recycled dyed fibers, including natural fibers and chemical fibers. The natural fibers include cotton, linen, silk, wool or cashmere, and the chemical fibers include Tencel, Modal, viscose, polyester or nylon.

Images