Method for preparing directional moisture-conducting dry and comfortable yarn for home textiles based on dislocation spinning

Abstract

The invention discloses a method for preparing directional moisture-conducting dry and comfortable yarn for home textiles based on dislocation spinning, and belongs to the field of functional yarn and home textiles. The method for preparing the directional moisture-conducting dry yarn for the home textiles comprises the following steps: (1) feeding three pieces of fiber into the yarn, feeding inner-layer roving (having a hydrophilic and water-retaining function) and middle-layer roving (having a moisture-conducting function) into a drawing roller, connecting outer-layer filaments (having a relatively hydrophobic function) into a front roller, not participating in drawing, and directly participating in twisting; the hydrophilic performance of the fiber is as follows: the outer layer is lt; an intermediate layer lt; an inner layer; (2) the dislocation distance between the drafting unit and the twisting and winding unit is 5-50 cm, and the dislocation angle is 15-65 degrees; and (3) winding and forming. The three-layer wrapped yarn with a relatively hydrophobic fiber outer layer, a moisture-conducting middle layer and a hydrophilic and water-retaining inner layer is prepared, and the yarn is natural in raw material, free of after-finishing, small in skin irritation and high in durability.

Description

Technical Field

[0001] The invention relates to a method for preparing yarn with directional moisture conduction and drying function for home textiles based on staggered spinning, and belongs to the field of functional yarns and home textiles. Background Art

[0002] Unidirectional moisture-conducting fabrics effectively improve the humidity of the microclimate between human skin and fabric, rapidly conducting sweat to the outer surface of the garment for evaporation, thereby enhancing wearing comfort. The driving force behind this unidirectional moisture conduction is primarily the added pressure of the capillary meniscus, the surface tension of the liquid, the pressure differential generated by the multi-level void structure, and the anisotropy of the liquid's breakthrough pressure across the thickness of the material.

[0003] Conventional one-way moisture-conducting fabrics use moisture-absorbing and quick-drying yarns. Literature related to moisture-absorbing and quick-drying yarns generally improves the moisture-absorbing and quick-drying properties of yarns by using physical or chemical modification methods, or by blending moisture-absorbing fibers with hydrophobic moisture-conducting fibers. For example: Patent CN107858778A discloses a method for preparing moisture-wicking yarn, wherein the yarn involved is firstly treated with plasma surface treatment of wool and chemically modified polyester fibers, and then the wool fibers and modified polyester are combed on a combing machine and drawn on a spinning machine to produce yarn with moisture-wicking properties; Patent CN110373769A) discloses a method for preparing a moisture-wicking blended yarn, wherein the yarn involved is blended with moisture-wicking polyester shaped fibers and modal fibers to achieve moisture-wicking and skin-friendly comfort. Patent CN110257986A discloses a yarn with an axially non-uniform structure that absorbs moisture quickly and dries quickly. This yarn uses hydrophilic and hydrophobic fibers that are alternately distributed along the yarn axis to create differences in the size of the capillaries inside the yarn, thereby generating a differential capillary effect that imparts the yarn with moisture-absorbing and quick-drying properties. Patent CN118407174A discloses a microporous moisture-wicking quick-drying yarn, its preparation method, and fabric. By modifying the monomers and alkali-treating the yarn, the yarn is made of alkali-soluble polyamide and connected to the openings and grooves, enabling rapid moisture absorption and diffusion transfer. Its main function is evaporation and quick drying, without considering liquid transmission and dryness after moisture absorption. Patent CN105178073A discloses a method for preparing a control line for intelligent liquid transmission, which mainly emphasizes its liquid transmission ability and does not involve the dryness-related functions of the yarn itself.

[0004] The yarns produced by these methods cannot take into account both the functions of close-fitting, rapid sweat absorption and directional moisture conduction and drying. Offset spinning is achieved by offsetting the drafting unit and the twisting and winding unit to change the width or geometric shape of the triangle area, further changing the transfer of fibers during the twisting process. While the process changes from coarse yarn to fine yarn, the three functional layers of fibers are clearly layered, and the functions of close-fitting, rapid sweat absorption and directional moisture conduction and drying can be achieved without the need for further functional compounding. At present, there are no reports on the design of fiber arrangement by offset spinning to achieve the functions of close-fitting, rapid sweat absorption and directional moisture conduction and drying. Summary of the Invention

[0005] [Technical Issues]: There has been no report on designing the arrangement of fibers by means of staggered spinning to achieve both close-fitting, rapid sweat absorption and directional moisture conduction and drying functions.

[0006] [Technical solution]: To address these issues, the present invention uses staggered spinning to create a three-layer wrapping of fibers: a relatively hydrophobic outer layer, a moisture-conducting middle layer, and a hydrophilic inner layer for moisture retention. This results in a yarn that combines close-fitting, rapid sweat absorption with targeted moisture conduction for a comfortable, dry feel. The yarn is made from natural raw materials, requires no post-finishing, is minimally irritating to the skin, and offers exceptional durability.

[0007] The first object of the present invention is to provide a method for preparing a directional moisture-conducting and dry yarn for home textiles based on staggered spinning, comprising the following steps: (1) Fiber: The fibers are fed into three yarns: the inner and middle rovings are fed into the drafting rollers, while the outer filaments are fed into the front rollers and do not participate in drafting but directly in twisting. The inner layer is hydrophilic and water-retaining; the middle layer is moisture-conducting; the outer layer is relatively hydrophobic; Hydrophilic properties of the fiber: outer layer < middle layer < inner layer; (2) Twisting and winding misalignment: The offset distance between the drafting unit and the twisting and winding unit is 5-50cm, and the offset angle is 15-65 degrees; (3) Winding molding.

[0008] In one embodiment of the present invention, the outer filaments in step (1) are one or more of polyester fibers such as nylon filaments, polyester filaments, spandex filaments, or polylactic acid filaments; the specifications are: 1-100D.

[0009] In one embodiment of the present invention, the inner layer roving in step (1) is one or more of cotton fiber, ramie fiber, acetate fiber, and silk fiber.

[0010] In one embodiment of the present invention, the middle layer roving in step (1) is one or more of cotton fiber, viscose fiber, and wool fiber.

[0011] In one embodiment of the present invention, the specifications of the inner layer roving and the middle layer roving in step (1) are 10-1000 Tex, more preferably 200 tex.

[0012] In one embodiment of the present invention, the fiber mass ratio of the outer layer, the middle layer, and the inner layer in step (1) is 5-30%: 15-55%: 30-80%.

[0013] In one embodiment of the present invention, in step (1), the fiber needs to be balanced at a temperature of 25°C ± 1 and a relative humidity of 60% ± 3 for ≥ 24 hours.

[0014] In one embodiment of the present invention, double rovings are fed in parallel in step (1).

[0015] In one embodiment of the present invention, the layered twisting in step (2) is to form an asymmetric twisting triangle area by the yarn passing through the yarn guide hook offset path, thereby reducing free fiber ends.

[0016] In one embodiment of the present invention, the spinning method in step (2) is one of ring spinning, siro spinning, sirofil spinning, compact spinning, siro compact spinning, etc.

[0017] In one embodiment of the present invention, in step (3), the yarn path is offset during winding and then wound to reduce the free fiber ends in the twisting triangle area. Lightweight steel wire rings and annular yarn guide hooks can be used to reduce friction and breakage rate.

[0018] In one embodiment of the present invention, the core components used in the method include: Misalignment device for the drafting unit and twisting and winding unit: Similar to conventional spinning, but with an adjustable misalignment device to control the misalignment distance. The misalignment adjustment device adjusts the misalignment distance (5-50cm) and direction (Z twist left slant / S twist right slant) through a mechanical or intelligent control system. Multi-layer twisting device: The spindle and front roller are staggered to change the yarn path (left or right slant); Winding and forming device: Use small-aperture yarn guide hook or mobile balloon device to optimize tension distribution.

[0019] The second object of the present invention is to provide a yarn for home textiles that can be prepared by the method of the present invention and has the characteristics of directional moisture conduction and drying.

[0020] In one embodiment of the present invention, the outer layer of the yarn for directional moisture conduction and drying of home textiles is not completely wrapped with the hydrophobic layer, leaving channels for moisture absorption, conduction and release.

[0021] The third object of the present invention is a method for producing yarn that has both close-fitting and fast sweat absorption and directional moisture conduction and drying. Based on the method of the present invention, the method enhances the function by adding water-repellent / hydrophobic finishing; or increases the hydrophilic function by plasma treatment, thereby simultaneously enhancing the hydrophilicity of the three-layer fiber.

[0022] The fourth object of the present invention is to prepare a yarn having the characteristics of close-fitting, fast sweat absorption and directional moisture conduction and drying, obtained by the method of the present invention.

[0023] In one embodiment of the present invention, the yarn having both close-fitting and rapid sweat absorption and directional moisture conduction for drying has improved moisture conduction performance and wear resistance compared with the previous yarn.

[0024] The fifth object of the present invention is to use the yarn with directional moisture conduction and drying function for home textiles, and the yarn with both close-fitting, fast sweat absorption and directional moisture conduction and drying function in the field of home textiles.

[0025] A sixth object of the present invention is to provide a home textile that uses the directional moisture-conducting and drying yarn for home textiles of the present invention, and has both close-fitting, fast sweat-absorbing properties and directional moisture-conducting and drying properties.

[0026] In one embodiment of the present invention, home textiles include shirts, T-shirts, underwear, quilts, pajamas, and the like.

[0027] [Beneficial effects]: (1) Offset spinning is a method of improving yarn quality by staggering the positions of the drafting unit and the twisting winding unit during the spinning process, thereby changing the width or geometric shape of the twisting triangle and further changing the fiber transfer during the twisting process. The present invention utilizes offset spinning to achieve the production of yarn that combines close-fitting, fast sweat absorption and directional moisture conduction for drying.

[0028] (2) Offset spinning changes the geometry of the spinning triangle, affecting the internal and external transfer of fibers and the distribution of tension, which has a significant impact on fiber migration. Fiber migration contributes to the stability of the yarn structure and the improvement of its strength. When designing yarns that have both the function of rapid sweat absorption and directional moisture conduction and drying, this adjustment of the geometry can be used as a reference to optimize the arrangement and fixation of the fibers in the yarn. Not only can the front and back of the fabric made of this yarn achieve the functions of moisture absorption and perspiration removal, moisture absorption and quick drying, but it can also achieve directional liquid transmission within the fabric.

[0029] (3) The yarn prepared by the present invention, which has both close-fitting and fast sweat absorption and directional moisture conduction and drying, uses natural raw materials, does not require extra post-processing, and has little irritation to the skin; the function is durable and there is no need to worry about the impact of subsequent washing on the function.

[0030] (4) In addition to the original two rovings, the present invention adds a naturally water-repellent yarn, which is wrapped around the outermost layer of the yarn. The coating effect can be controlled by adjusting the offset distance, draft ratio and twisting related parameters.

[0031] (5) The yarn prepared by the present invention has both close-fitting and fast sweat absorption and directional moisture conduction and drying. While meeting the function of directional liquid transmission, especially after absorbing moisture or liquid water, it can keep the surface of the yarn dry. This is an important function of home textiles for sleeping (including but not limited to quilts, pajamas, etc.). It does not stimulate the human body during sleep and reduces the impact on sleep quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Schematic diagram of the twisting zone of the staggered spinning technology in Example 1; Figure 2 This is the actual yarn effect diagram of Example 1 (white inner layer, red middle layer, black outer layer). DETAILED DESCRIPTION

[0033] The following describes preferred embodiments of the present invention. It should be understood that the embodiments are for better explanation of the present invention and are not intended to limit the present invention. 1. Yarn performance test:

[0034] GB / T 21655.1-2008; 2. Water drip diffusion time test: After the fabric is made, take a sample of 10cm×10cm in size, drop 0.2mL of grade 3 water no higher than 1cm, and the water absorption and diffusion time is ≤60 seconds. Coolmax® control: 60s, 50% cotton, 50% polyester (Coolmax) blend.

[0035] The core components used in the embodiment method are as follows: Misalignment device for the drafting unit and twisting and winding unit: Similar to conventional spinning, but with an adjustable misalignment device to control the misalignment distance. The misalignment adjustment device adjusts the misalignment distance (5-50cm) and direction (Z twist left slant / S twist right slant) through a mechanical or intelligent control system. Multi-layer twisting device: The spindle and front roller are staggered to change the yarn path (left or right slant); Winding and forming device: Use small-aperture yarn guide hook or mobile balloon device to optimize tension distribution.

[0036] Example 1: The method for preparing directional moisture-conducting and dry yarn for home textiles based on staggered spinning comprises the following steps:

[0037] (1) Roving fiber: Outer layer: polyester filament (moisture regain 0.4%); Middle: cotton fiber (8.5% moisture regain); Inner layer: viscose fiber (moisture regain 12%); According to the mass percentage, the outer hydrophobic layer, the middle moisture-conducting layer, and the inner hydrophilic and water-retaining layer account for 15%: 35%: 50% respectively; The fiber is balanced at a workshop temperature of 25℃±1 and a relative humidity of 60%±3 for ≥24 hours; The fibers are fed into three yarns: the inner and middle rovings are fed into the drafting rollers, while the outer filaments are fed into the front rollers and do not participate in drafting but directly in twisting. The inner layer is hydrophilic and water-retaining; the middle layer is moisture-conducting; the outer layer is relatively hydrophobic; Hydrophilic properties of the fiber: outer layer < middle layer < inner layer; (2) Twisting and winding misalignment: The machine uses a staggered device for the drafting unit and the twisting and winding unit, with double rovings fed in parallel. The inner and middle roving layers have a basis weight of 200tex. The staggered distance between the drafting unit and the twisting and winding unit is 30cm, with a staggered angle of 15 degrees (left oblique direction, suitable for Z-twist yarns). The center distance between the bell mouth is 5mm, and the front roller forward stroke is 3mm. (3) Winding Winding device: uses lightweight steel wire ring and annular yarn guide hook (aperture 1.2mm); Tension control: The balloon control ring dynamically adjusts the spinning tension to 12cN, reducing the end-down rate.

[0038] The obtained yarn was subjected to performance testing, and the test results are as follows: The diffusion time of dripping water is 13.6 seconds; The outer layer of the yarn has a wrapping integrity rate of ≥95%, the middle layer of cotton fibers forms a continuous channel, and the inner layer of viscose fibers fills the pores after absorbing water. The liquid is transmitted inside the yarn, and the outside is dry.

[0039] Example 2:

[0040] The offset distance between the drafting unit and the twisting winding unit in step (2) of Example 1 was adjusted to 45 cm, and the offset angle was 35 degrees (left oblique direction, suitable for Z-twisted yarn). Other adjustments were made to remain the same as in Example 1 to obtain yarn.

[0041] The obtained yarn was subjected to performance testing, and the test results are as follows: The diffusion time of the dripping water is 9.3 seconds.

[0042] Example 3:

[0043] A method for producing yarn that has both close-fitting, fast sweat absorption and directional moisture conduction and drying properties, wherein the method is based on Example 1 and is enhanced by plasma hydrophilic treatment.

[0044] The obtained yarn was subjected to performance testing, and the test results are as follows: Double-strand staggered yarn is twisted together to increase the moisture-conducting channel density by 20%; The water drop spread time was 6.5 seconds (Coolmax® control: 55.4 seconds).

[0045] Comparative Example 1: The outer hydrophobic layer in Example 1 was omitted, and the other parts remained the same as in Example 1 to obtain a yarn.

[0046] The obtained yarn was subjected to performance testing, and the test results are as follows: Water drop diffusion time: 23.9 seconds.

[0047] Example 4:

[0048] The offset distances of the drafting unit and the twisting and winding unit in step (2) of Example 1 were adjusted to 25 cm, 28 cm, and 33 cm, and the other distances remained the same as in Example 1 to obtain yarn.

[0049] The obtained yarn was subjected to performance testing, and the test results are as follows: Table 1: distance 25cm 28cm 33cm Droplet diffusion time 19.5 seconds 13.5 seconds 17.6 seconds

[0050] Example 5 The outer hydrophobic layer in Example 1 was adjusted to nylon filaments, and the other parts were kept consistent with Example 1 to obtain yarn.

[0051] The obtained yarn was subjected to performance testing, and the test results are as follows: Water drop diffusion time: 8.9 seconds.

[0052] Although the present invention has been disclosed above in terms of preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the claims.

Claims

1. A method for preparing directional moisture-conducting and dry yarn for home textiles based on staggered spinning, characterized in that: The steps include: (1) Fiber: The fibers are fed into three yarns: the inner and middle rovings are fed into the drafting rollers, while the outer filaments are fed into the front rollers and do not participate in drafting but directly in twisting. The inner layer is hydrophilic and water-retaining; the middle layer is moisture-conducting; the outer layer is relatively hydrophobic; Hydrophilic properties of the fiber: outer layer < middle layer < inner layer; (2) Twisting and winding misalignment: The offset distance between the drafting unit and the twisting and winding unit is 5-50cm, and the offset angle is 15-65 degrees; (3) Winding molding.

2. The method according to claim 1, characterized in that In step (1), the fiber mass ratios of the outer layer, the middle layer, and the inner layer are 5-30%: 15-55%: 30-80%.

3. The method according to claim 1, characterized in that In step (1), the outer filaments are one or more of polyester fibers such as nylon filaments, polyester filaments, spandex filaments, or polylactic acid filaments.

4. The method according to claim 1, wherein In step (2), the twisting is to form an asymmetric twisting triangle area by the yarn passing through the yarn guide hook offset path to reduce the hairiness; the spinning method is one of ring spinning, siro spinning, sirofil spinning, compact spinning, siro compact spinning, etc.

5. The yarn for home textiles with directional moisture conduction and drying properties prepared by the method according to any one of claims 1 to 4.

6. A method for producing yarn that has both close-fitting, fast sweat absorption and directional moisture conduction and drying, characterized in that: Based on the method according to any one of claims 1 to 4, a hydrophobic / water-repellent finishing is added, or a plasma treatment is performed to increase the hydrophilic function.

7. The method according to claim 6 produces a yarn that has both close-fitting, fast sweat absorption and directional moisture conduction for drying.

8. Use of the yarn for home textiles with directional moisture conduction and drying according to claim 5 and the yarn for home textiles with close-fitting, fast sweat absorption and directional moisture conduction and drying according to claim 7 in the field of home textiles.

9. A home textile, characterized in that: The yarn for home textiles with directional moisture conduction and drying as claimed in claim 5 and the yarn with close-fitting, fast sweat absorption and directional moisture conduction and drying as claimed in claim 7 are used.

10. The home textile according to claim 9, characterized in that Home textiles include shirts, T-shirts, underwear, quilts, pajamas, etc.

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