Micro-porous moisture-absorbing and sweat-releasing quick-drying yarn, preparation method thereof and fabric

Abstract

The present application relates to the technical field of textile materials, and particularly relates to a kind of micro-porous moisture absorption and sweat releasing quick-drying yarn and its preparation method and fabric, comprising the following steps: S1, preparation, polyamide chip is prepared by using reaction monomer, water-soluble monomer and dispersed monomer in-situ polymerization and slicing;S2, polyamide filament with special cross section is obtained by spinning and winding with polyamide chip as raw material;S3, leaflet open hole polyamide filament is obtained by alkali treatment in the state of skein;S4, leaflet open hole polyamide filament is processed into polyamide staple fiber, and core yarn is obtained by wrapping polyamide staple fiber around Coolmax filament to obtain core-spun yarn.The present application realizes alkali-soluble polyamide and realizes the communication of opening and groove by changing monomer and skein alkali treatment, and can quickly absorb moisture, diffuse and transfer, and evaporate to dry quickly;The technical defects that the inherent gap between the existing staple yarn cannot quickly guide moisture and release sweat are solved, and the moisture and sweat releasing performance of the yarn is further improved.

Description

Technical Field

[0001] This invention relates to the field of textile materials technology, specifically to a microporous moisture-wicking and quick-drying yarn, its preparation method, and the fabric thereof. Background Technology

[0002] Textiles require good comfort and functionality. Nylon fiber has a natural cooling sensation, and because of its low modulus, fabrics made from it are soft and elastic. However, because nylon fiber has a high moisture regain of up to 4.5%, sweat will be locked in the inner layer of the fiber, resulting in poor moisture absorption and quick-drying properties. Therefore, when wearing fabrics made of nylon fiber, the fabric tends to stick to the body when sweating during exercise, and it cannot keep the body dry.

[0003] Regarding improvements in moisture-wicking technology, the following four techniques are currently used: First, adding hydrophilic agents during the spinning process to increase the moisture absorption and wicking properties of the fibers; second, changing the cross-sectional shape of the fibers during spinning, such as trefoil, cross, or pentagon shapes, utilizing the capillary effect generated by the micro-grooves on the fiber surface to allow sweat to quickly migrate to the surface of the fabric and disperse through wicking, diffusion, and transport, thereby achieving a certain moisture absorption and wicking effect; third, adding porous materials such as bamboo charcoal and volcanic rock during the chemical fiber spinning process to give the fibers certain moisture absorption and wicking functions; and fourth, adding moisture-wicking auxiliaries during the dyeing and finishing stage to give fiber products certain moisture absorption and wicking functions.

[0004] The shortcomings of existing moisture-wicking fibers and their products during use have received increasing attention. For example, high moisture-wicking fibers obtained by adding hydrophilic agents during spinning have uneven distribution of the hydrophilic agents within the fiber and are easily affected by other auxiliaries during fabric finishing, resulting in unstable moisture absorption and wicking properties in the final product. Fibers with altered cross-sections experience friction and compression during actual use, damaging the original surface groove structure and weakening the material's moisture-wicking function. Fabrics that acquire moisture-wicking properties through finishing gradually lose their function with increased use and washing. Furthermore, materials with naturally occurring microporous structures, such as bamboo charcoal, volcanic rock, and graphene, are unevenly distributed on or inside the fiber surface, resulting in unstable moisture-wicking performance, limited color options, and high costs, thus restricting production and sales volume in practical applications.

[0005] Regarding the technology of creating pores on the fiber surface, it is generally applied to polyester fibers. One method of creating pores is to decompose the polymer, and another is to dissolve inorganic particles, as illustrated in Chinese patent publication (CN103603070A). Existing technologies include porous polyamides, but their pore-creating method involves alkali-soluble polyester in the second component undergoing alkali hydrolysis. Summary of the Invention

[0006] The purpose of this invention is to provide a microporous moisture-wicking and quick-drying yarn, its preparation method, and fabric, which has outstanding characteristics such as high moisture absorption and wicking, rapid and uniform moisture diffusion, quick evaporation and drying, washability, rich colors, and stable performance.

[0007] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows:

[0008] A method for preparing a microporous moisture-wicking and quick-drying yarn includes the following steps:

[0009] S1. Prepare polyamide chips by in-situ polymerization of reactive monomers, water-soluble monomers and dispersed monomers, followed by slicing. The water-soluble monomers account for 1%-15% of the mass fraction, and the dispersed monomers account for 0.1%-3% of the mass fraction.

[0010] S2. Using polyamide chips as raw material, polyamide filaments with irregular cross sections are obtained by passing through a screw press, composite spinning box, spinneret, and side blowing cooling, stretching, heat setting and winding. The outer ring of the irregular cross section has multiple lobes and axially extending grooves are formed between adjacent lobes, and the winding method is skein yarn.

[0011] S3. Obtain leaf-shaped open-pore polyamide filaments by alkali treatment in skein state, with a treatment temperature of 90℃-120℃ and a treatment time of 30min-60min.

[0012] S4. The polyamide filament with open leaflets from step S3 is processed into polyamide staple fiber. Using Coolmax filament as the core filament, polyamide staple fiber is wrapped around Coolmax filament to obtain core-spun yarn.

[0013] Preferably, the polyamide staple fiber has a linear density of 1.3 dtex-2.3 dtex and a length of 30 mm-60 mm.

[0014] Preferably, nano-inorganic powder is also added to the polyamide chips, and the mass fraction of nano-inorganic powder is 0.5%-6%.

[0015] Preferably, the reactant monomer is caprolactam.

[0016] Preferably, the in-situ polymerization process in step S1 is as follows: after being heated to 160℃-200℃ by a preheater, the preheated caprolactam, water-soluble monomer, and dispersed monomer are mixed by a static mixer and then enter a polymerizer with stirring. The reaction is carried out under nitrogen protection at a reaction temperature of 240℃-300℃. The material is discharged from the bottom of the polymerizer and transported by a melt gear pump. After being cast and pelletized, the material enters a pre-extraction tank, an extraction tower, and a drying tower at a drying temperature of 120℃-180℃. After leaving the drying tower, the material enters a cooling tower and is cooled to obtain the copolymer product.

[0017] Preferably, the water-soluble monomer is vinylimidazole and / or dimethylaminoethyl methacrylate, and the dispersing monomer includes vinyl alcohol and acrylic acid.

[0018] Preferably, the wrapping in step S4 adopts a double wrapping method, specifically: first, polyamide staple fiber wraps coolmax filament in the S-twist direction, and then polyamide staple fiber wraps coolmax filament in the Z-twist direction, wherein the S-twist twist is 300 twists / meter-800 twists / meter, and the Z-twist twist is the same as the S-twist twist.

[0019] The present invention also provides a microporous moisture-wicking and quick-drying yarn prepared by the above preparation method. The polyamide staple fiber is wrapped with Coolmax filament in a double-wrap manner. The cross-sectional shape of the polyamide staple fiber has multiple leaf lobes on the outer ring. A groove is formed between two adjacent leaf lobes and several through holes connected to the groove are distributed on each leaf lobe.

[0020] The present invention further provides a fabric comprising an inner layer and an outer layer, wherein the inner layer has a raised structure and the outer layer has a mesh structure; the raised structure is a padding structure, and the yarn used in the padding structure is a microporous moisture-wicking and quick-drying yarn; the mesh structure is a tucked mesh structure, which is woven from a combination of polyester filament and microporous moisture-wicking and quick-drying yarn.

[0021] The fabric finishing process includes a second alkali treatment, which involves immersing the fabric in a solid alkali solution. The amount of solid alkali added is 1g / L-5g / L, the treatment time is 5min-30min, and the treatment temperature is 50℃-120℃.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] This invention achieves alkali-soluble polyamide by modifying the monomer and through synergistic alkali treatment of the yarn, and realizes the interconnection of pores and grooves. This enables rapid moisture absorption, diffusion, and evaporation, overcoming the technical shortcomings of existing microporous fiber preparation technologies, such as the lack of interconnection between pores leading to moisture accumulation and reliance solely on wicking for perspiration, resulting in limited perspiration wicking effectiveness. Compared to packaged filament treatment, this invention avoids the difference in the number and quality of micropores between the inner and outer composite filaments, ensuring good and stable moisture absorption, perspiration wicking, and quick-drying performance of the yarn. This invention utilizes dispersed monomers to protect and stabilize the polymerization reaction and ensure uniform monomer dispersion, promoting stable moisture absorption, perspiration wicking, and quick-drying performance of subsequent fiber products.

[0024] This invention utilizes core-spun yarn, in which Coolmax filaments are wrapped with polyamide staple fibers of 1.3 dtex-2.3 dtex. This increases the pore size of the woven fabric, overcoming the technical defect of existing staple yarns where the inherent gaps between staple fibers prevent rapid moisture wicking. This further improves the yarn's moisture-wicking performance, achieving a quick-drying effect. The finished fabric exhibits an evaporation rate ≥0.28 g / h and a moisture permeability ≥11000 g / (m²). 2 ·d). The double wrapping of S-twist and Z-twist can effectively balance the overall yarn twist, solving the technical problem that the yarn is prone to unwinding during weaving, which can lead to yarn breakage and holes. On the other hand, after double wrapping, the polyamide staple fiber has good coverage over the coolmax filament, avoiding the technical defect that coolmax is easily damaged by friction when exposed.

[0025] This invention utilizes a second alkali treatment after the fabric is woven from moisture-wicking and quick-drying yarn and polyester filament. This treatment strengthens the perforations in the moisture-wicking and quick-drying yarn and reduces the amount of polyester filament, thereby improving the fabric's hand feel and enhancing its moisture-wicking and quick-drying properties.

[0026] The yarn and its finished products prepared by this invention have good and stable moisture absorption, perspiration wicking and quick-drying properties, can be dyed in any color, can be mass-produced, and are highly efficient. Detailed Implementation

[0027] Example 1

[0028] This embodiment provides a microporous moisture-wicking and quick-drying yarn, which is a core-spun yarn in which polyamide staple fiber is double-wound with Coolmax filament. The Coolmax filament has a linear density of 50D / 24f, and the polyamide staple fiber has a linear density of 1.6dtex and a length of 38mm. The cross-sectional shape of the polyamide staple fiber is a three-lobed grooved type with three lobes on the outer ring. A groove is formed between adjacent lobes, and each lobe has several through holes connected to the groove.

[0029] The method for preparing this core-spun yarn includes the following steps:

[0030] S1. Polyamide chips are prepared by in-situ polymerization of a reactive monomer, 5% water-soluble monomer, 2% dispersing monomer and 2% nano-inorganic powder, followed by slicing. The reactive monomer is caprolactam, the water-soluble monomer is vinylimidazole, the dispersing monomer includes ethylene alcohol and acrylic acid, and the nano-inorganic powder is zirconium oxide.

[0031] The in-situ polymerization process is as follows: after being heated to 180°C in a preheater, the preheated caprolactam, water-soluble monomer, dispersing monomer, and UV stabilizer are mixed in a static mixer and then enter a polymerizer with stirring. The reaction is carried out under nitrogen protection with a purity of ≥99.999% at a reaction temperature of 280°C. The material is discharged from the bottom of the polymerizer and transported by a melt gear pump. After being cast into a strip and pelletized, it enters a pre-extraction tank, an extraction tower, and a drying tower. It is extracted in pure water at 80°C and dried in nitrogen at 150°C. After leaving the drying tower, it enters a cooling tower and is cooled to obtain the copolymer product.

[0032] S2. Using polyamide chips as raw material, a three-lobed profile polyamide filament is obtained by passing through a screw press, a composite spinning box, a spinneret, and side-blowing cooling, stretching, heat setting, and winding. The outer ring of the profile has three lobes and axially extending grooves between adjacent lobes, and the winding method is skein yarn.

[0033] S3. Polyamide filaments with leaf-shaped openings were obtained by alkali treatment in 3% NaOH and 2% hydrogen peroxide in skein form. The treatment temperature was 110℃ and the treatment time was 60min.

[0034] S4. The polyamide filament with open leaflets from step S3 is processed into polyamide staple fiber. Using Coolmax filament as the core filament, the polyamide staple fiber is wrapped around the Coolmax filament using a friction spinning process to obtain core-spun yarn. The wrapping is done in a double-wrap manner, specifically: first, the polyamide staple fiber wraps the Coolmax filament in the S-twist direction, and then the polyamide staple fiber wraps the Coolmax filament in the Z-twist direction. The S-twist twist is 500 twists / meter, and the Z-twist twist is the same as the S-twist twist.

[0035] In this embodiment, the core-spun yarn is woven into a fabric, and then a second alkali treatment and setting treatment are performed after dyeing. The second alkali treatment involves immersing the fabric in a solid alkali solution. The amount of solid alkali added is 2.5 g / L, the treatment time is 10 min, and the treatment temperature is 70°C. The setting temperature is 160°C, and the setting time is 10 min, thus preparing a microporous moisture-wicking and quick-drying fabric.

[0036] The fabric comprises an inner layer and an outer layer. The inner layer has a raised structure, and the outer layer has a mesh structure. The raised structure is a 2x5 padding structure, and the yarn used for the padding structure is a microporous moisture-wicking and quick-drying yarn. The mesh structure is a tucked mesh structure, which is woven from a combination of polyester filament and microporous moisture-wicking and quick-drying yarn.

[0037] Example 2

[0038] This embodiment provides a microporous moisture-wicking and quick-drying yarn, which is a core-spun yarn in which polyamide staple fiber is double-wound with Coolmax filament. The Coolmax filament has a linear density of 60D / 36f, and the polyamide staple fiber has a linear density of 1.7dtex and a length of 40mm. The cross-sectional shape of the polyamide staple fiber is a three-lobed grooved type with three lobes on the outer ring. A groove is formed between adjacent lobes, and each lobe has several through holes connected to the groove.

[0039] The method for preparing this core-spun yarn includes the following steps:

[0040] S1. Polyamide chips are prepared by in-situ polymerization of a reactive monomer, 8% water-soluble monomer, 2.5% dispersing monomer and 1.5% nano-inorganic powder, followed by slicing. The reactive monomer is caprolactam, the water-soluble monomer is dimethylaminoethyl methacrylate, the dispersing monomer includes ethylene alcohol and acrylic acid, and the nano-inorganic powder is zirconium ethoxide.

[0041] The in-situ polymerization process is as follows: after being heated to 180°C in a preheater, the preheated caprolactam, water-soluble monomer, dispersing monomer, and UV stabilizer are mixed in a static mixer and then enter a polymerizer with stirring. The reaction is carried out under nitrogen protection with a purity of ≥99.999% at a reaction temperature of 280°C. The material is discharged from the bottom of the polymerizer and transported by a melt gear pump. After being cast into a strip and pelletized, it enters a pre-extraction tank, an extraction tower, and a drying tower. It is extracted in pure water at 80°C and dried in nitrogen at 150°C. After leaving the drying tower, it enters a cooling tower and is cooled to obtain the copolymer product.

[0042] S2. Using polyamide chips as raw material, a three-lobed profile polyamide filament is obtained by passing through a screw press, a composite spinning box, a spinneret, and side-blowing cooling, stretching, heat setting, and winding. The outer ring of the profile has three lobes and axially extending grooves between adjacent lobes, and the winding method is skein yarn.

[0043] S3. Polyamide filaments with leaf-shaped openings were obtained by alkali treatment in 3% NaOH and 2% hydrogen peroxide in skein form. The treatment temperature was 110℃ and the treatment time was 60min.

[0044] S4. The polyamide filament with leaf-shaped openings from step S3 is processed into polyamide staple fibers. Using Coolmax filament as the core yarn, the polyamide staple fibers are wrapped around the Coolmax filament using a friction spinning process to obtain core-spun yarn. The wrapping is done in a double-wrap manner, specifically: first, the polyamide staple fibers are wrapped around the Coolmax filament in the S-twist direction, and then the polyamide staple fibers are wrapped around the Coolmax filament in the Z-twist direction. The S-twist twist is 600 twists / meter, and the Z-twist twist is the same as the S-twist twist.

[0045] In this embodiment, the core-spun yarn is used to weave a fabric, and after dyeing, a second alkali treatment and setting treatment are performed. The second alkali treatment involves immersing the fabric in a solid alkali solution. The amount of solid alkali added is 3.5 g / L, the treatment time is 10 min, and the treatment temperature is 60°C. The setting temperature is 165°C, and the setting time is 10 min, thus preparing a microporous moisture-wicking and quick-drying fabric.

[0046] The fabric comprises an inner layer and an outer layer. The inner layer has a raised structure, and the outer layer has a mesh structure. The raised structure is a 2x5 padding structure, and the yarn used for the padding structure is a microporous moisture-wicking and quick-drying yarn. The mesh structure is a tucked mesh structure, which is woven from a combination of polyester filament and microporous moisture-wicking and quick-drying yarn.

[0047] Comparative Example 1

[0048] The only difference between this comparative example and Example 1 is that the spinning and winding method uses bobbins and the same alkali treatment process is performed in the form of long filament bobbins.

[0049] Comparative Example 2

[0050] The only difference between this comparative example and Example 1 is that the modified nylon chip raw material does not contain water-soluble monomers.

[0051] Comparative Example 3

[0052] The only difference between this comparative example and Example 1 is that the linear density of the polyamide staple fiber is 4.5 dtex.

[0053] Fabrics from Example 1 and Comparative Examples 1-3 were taken respectively and their moisture absorption and quick-drying properties were determined according to GB / T 21655.1-2008. See Table 1.

[0054] Table 1: Test results of moisture absorption and quick-drying performance of Example 1 and Comparative Examples 1-3 of the present invention

[0055] Water absorption rate (%) Cubic suction height (mm / 30min) Drying rate (g / h) <![CDATA[Water vapor transmission rate (g / (m 2 ·24 h))]]> Example 1 346 206 0.32 <![CDATA[1.21*10 4 ]]> Comparative Example 1 235 121 0.19 10000 Comparative Example 2 162 84 0.12 7000 Comparative Example 3 312 187 0.24 <![CDATA[1.05*10 4 ]]>

[0056] The foregoing has shown and described the basic principles, main features and advantages of this invention. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are only illustrative of the principles of this invention. Various changes and modifications can be made to this invention without departing from the spirit and scope of this invention. All such changes and modifications fall within the scope of this invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A fabric, characterized in that: The fabric comprises an inner layer and an outer layer. The inner layer has a raised structure, and the outer layer has a mesh structure. The raised structure is a padding structure, and the yarn used for the padding structure is a microporous moisture-wicking and quick-drying yarn. The mesh structure is a tucked mesh structure, which is woven from a combination of polyester filament and microporous moisture-wicking and quick-drying yarn. The fabric finishing process includes a second alkali treatment, which involves immersing the fabric in a solid alkali solution for treatment. The amount of solid alkali added is 1g / L-5g / L, the treatment time is 5min-30min, and the treatment temperature is 50℃-120℃. The preparation method of this microporous moisture-wicking and quick-drying yarn includes the following steps: S1. Prepare polyamide chips by in-situ polymerization of reactive monomers, water-soluble monomers and dispersed monomers, followed by slicing. The water-soluble monomers account for 1%-15% of the mass fraction, and the dispersed monomers account for 0.1%-3% of the mass fraction. S2. Using polyamide chips as raw material, polyamide filaments with irregular cross sections are obtained by passing through a screw press, composite spinning box, spinneret, and side blowing cooling, stretching, heat setting and winding. The outer ring of the irregular cross section has multiple lobes and axially extending grooves are formed between adjacent lobes, and the winding method is skein yarn. S3. Obtain leaf-shaped open-pore polyamide filaments by alkali treatment in skein state, with a treatment temperature of 90℃-120℃ and a treatment time of 30min-60min. S4. The polyamide filament with open leaflets from step S3 is processed into polyamide staple fiber. The polyamide staple fiber has a linear density of 1.3dtex-2.3dtex and a length of 30mm-60mm. Coolmax filament is used as the core filament. Polyamide staple fiber is wrapped around Coolmax filament to obtain core-spun yarn. Polyamide staple fiber is wrapped around Coolmax filament in a double-wrapping manner. The cross-sectional shape of polyamide staple fiber has multiple leaflets on the outer ring. Grooves are formed between adjacent leaflets, and several through holes connected to the grooves are distributed on each leaflet.

2. The fabric according to claim 1, characterized in that: The polyamide chips also contain nano-inorganic powder, with a mass fraction of 0.5%-6%.

3. The fabric according to claim 1, characterized in that: The reactant monomer is caprolactam.

4. The fabric according to claim 3, characterized in that: The in-situ polymerization process in step S1 is as follows: after being heated to 160℃-200℃ by a preheater, the preheated caprolactam, water-soluble monomer, and dispersed monomer are mixed by a static mixer and then enter a polymerizer with stirring. The reaction is carried out under nitrogen protection at a reaction temperature of 240℃-300℃. The material is discharged from the bottom of the polymerizer and transported by a melt gear pump. After being cast and pelletized, it enters a pre-extraction tank, an extraction tower, and a drying tower at a drying temperature of 120℃-180℃. After leaving the drying tower, it enters a cooling tower and is cooled to obtain the copolymer product.

5. The fabric according to claim 1, characterized in that: The water-soluble monomer is vinylimidazole and / or dimethylaminoethyl methacrylate, and the dispersing monomer includes vinyl alcohol and acrylic acid.

6. The fabric according to claim 1, characterized in that: The wrapping in step S4 adopts a double wrapping method, specifically: first, polyamide staple fiber wraps coolmax filament in the S-twist direction, and then polyamide staple fiber wraps coolmax filament in the Z-twist direction, wherein the S-twist twist is 300 twists / meter-800 twists / meter, and the Z-twist twist is the same as the S-twist twist.