Breathability-enhanced wrap yarn for sports and preparation method thereof

Abstract

The invention relates to a breathable enhanced wrap yarn for sports and a preparation method thereof. The wrap yarn comprises polyester filament yarn, cotton staple fiber and tencel staple fiber, the polyester filament yarn forms core yarn of the wrap yarn, the cotton staple fiber and the tencel staple fiber form outer covering yarn of the wrap yarn, and the polyester filament yarn and the tencel staple fiber are both Y-shaped cross-section fiber. The polyester has the advantages of high strength, excellent shape retention and quick drying, the cotton and the tencel have good moisture absorption and air permeability to make up for the defects of the polyester, and meanwhile, the tencel has a good antibacterial effect to make up for the defect that the cotton is prone to bacterial breeding, so that the fabric has good moisture absorption, sweat releasing and air permeability effects and is excellent in strength; in addition, by controlling the diameter difference between the outer-layer fibers and the inner-layer fibers, gradient capillary pressure difference is generated between pores of the fibers with different diameters, water is promoted to migrate from the inner layer to the outer layer in a one-way mode, and therefore the perspiration and quick-drying effects are obviously improved.

Description

Technical Field

[0001] The present invention relates to a covered yarn, in particular to a breathable enhanced sports covered yarn and a preparation method thereof Background Art

[0002] Yarns are made up of many different types of fibers, each with distinct properties. Yarns composed of a single fiber have many limitations due to their single nature. To address this, a process for producing covered yarns has been developed. This process combines fibers of multiple different materials into a single piece, creating a multi-faceted effect. For example, traditional elastic fibers (such as spandex) are susceptible to friction damage and have poor dyeability when used directly. A covered structure insulates the core yarn from external friction through the outer layer of fibers, while also imparting dyeability and a diverse appearance. Conventional yarns struggle to balance elasticity, strength, and comfort. For example, pure spandex has high elasticity but is prone to aging and breakage, while cotton / polyester offers strength but lacks elasticity. Covered yarns achieve complementary material properties through a composite structure. Covered yarns not only combine the advantages of multiple fiber materials but also leverage their inherent structure to achieve enhanced mechanical properties and elastic control. Covered yarns cost 15%-25% more than conventional yarns, but this cost difference is partially offset by reduced weaving losses (reducing breakage rates by over 50%).

[0003] Currently, in the field of sports fabrics, higher requirements are being placed on the breathability, moisture absorption and perspiration of fabrics as well as the strength of the fabrics themselves. Therefore, if the process of covering yarn can be introduced into sports fabrics, the relevant performance of the fabrics should be further improved. Summary of the Invention

[0004] The present invention provides a breathable enhanced sports covered yarn and a preparation method thereof, which solves the problem in the prior art that the sportswear industry has higher requirements on the breathability, perspiration and moisture absorption and strength of fabrics.

[0005] The above-mentioned technical problems of the present invention are mainly solved by the following technical solutions: a breathable enhanced sports covered yarn, comprising 30 to 45wt% polyester filaments, 20 to 30wt% cotton staple fibers, and 30 to 50wt% Tencel staple fibers, wherein the polyester filaments constitute the core yarn of the covered yarn, the cotton staple fibers and the Tencel staple fibers constitute the outer covering yarn of the covered yarn, the uniform fiber diameter of the polyester filaments is smaller than the average fiber diameter of the cotton staple fibers and the Tencel staple fibers, and the polyester filaments and the Tencel staple fibers are both Y-shaped cross-section fibers.

[0006] The present invention uses three fiber materials: polyester, cotton, and Tencel. Among them, polyester has high strength, with a breaking strength of ≥4.5cN / dtex; excellent shape retention, and is not easily deformed after washing; quick drying, with a moisture absorption rate of only 0.4%-0.8%, and a water evaporation rate 50% faster than cotton. However, polyester has poor air permeability, is prone to static electricity, and has poor moisture absorption and perspiration removal. Cotton and Tencel both have good moisture absorption and breathability, are natural and environmentally friendly, but cotton is prone to bacterial growth and has poor durability. Tencel has a good antibacterial effect, so the three can complement each other, making the present invention have good moisture absorption and perspiration removal and breathability effects. At the same time, the present invention also enhances the moisture absorption and perspiration removal effect by using polyester filaments and Tencel staple fibers with Y-shaped cross-sections. The Y-shaped cross-section fibers form longitudinal moisture-conducting grooves, and the moisture absorption and perspiration removal efficiency is increased to twice that of conventional fibers. At the same time, the present invention also forms a layered structure similar to annual rings by controlling the diameter difference between the outer fiber and the inner fiber. The pores of fibers of different diameters create a gradient capillary pressure difference, promoting unidirectional moisture migration from the inner layer to the outer layer. Specifically, the inner layer of polyester filaments uses ultra-fine denier fibers to form dense moisture-conducting channels, while the outer layer of cotton staple fibers and Tencel staple fibers uses coarse denier fibers to create a rapid evaporation surface.

[0007] The present invention also provides a method for preparing a breathable enhanced sports covered yarn, which is characterized by:

[0008] Step 1: subjecting the polyester filament to an antistatic treatment to reduce the spinning friction coefficient to below 0.15; subjecting the Tencel staple fiber and the cotton staple fiber to a mixed opening treatment and spraying a hydrophilic spinning oil agent;

[0009] Step 2, twisting the polyester filament obtained in step 1;

[0010] Step 3: Prepare the covered yarn using a hollow spindle covered spinning machine, feeding the yarn in layers, feeding the polyester filament obtained in step 2 into the core layer, and feeding the mixed fiber of Tencel staple fiber and cotton staple fiber obtained in step 1 into the outer layer, leaving 15%-20% uncovered area in the covering layer to form a breathable channel;

[0011] Step 4: perform the following post-treatments in sequence: hydroentanglement, hydrophilic finishing and heat setting.

[0012] The present invention adjusts the parameters of the hollow spindle coated spinning machine to retain 15%-20% uncovered area of the coating layer, which is conducive to forming a breathable channel, enhancing the air circulation efficiency and the contact area between air and yarn, thereby improving the air permeability and quick-drying effect of the yarn.

[0013] Therefore, compared with the prior art, the present invention has the following characteristics: 1. The present invention uses three fiber materials, polyester, cotton and Tencel. Polyester has the advantages of high strength, excellent shape retention and quick drying. Cotton and Tencel both have good moisture absorption and breathability to make up for the shortcomings of polyester. Tencel also has a good antibacterial effect to make up for the defect that cotton is prone to bacterial growth. This makes the present invention have good moisture absorption and perspiration and breathability effects, as well as excellent strength.

[0014] 2. The present invention also controls the diameter difference between the outer and inner fibers, creating a gradient capillary pressure difference between the pores of fibers of different diameters. This promotes unidirectional migration of moisture from the inner layer to the outer layer, thereby significantly improving perspiration wicking and quick-drying effects.

[0015] 3. The coated yarn disclosed in the present invention has a coating layer that retains 15%-20% uncovered area, which is conducive to forming a breathable channel, enhancing the air circulation efficiency and the contact area between air and yarn, thereby improving the air permeability and quick-drying effect of the yarn. DETAILED DESCRIPTION

[0016] The technical solution of the present invention is further specifically described below through examples.

[0017] Example 1: A breathable enhanced sports covered yarn, comprising 30wt% polyester filament, 20wt% cotton staple fiber, and 50wt% Tencel staple fiber, wherein the polyester filament is specifically fine denier polyester filament (specification: 75D / 144F, breaking strength ≥4.5cN / dtex, boiling water shrinkage ≤3%), the specific specification of the Tencel staple fiber is: 1.2D×38mm, and the specific specification of the cotton staple fiber is: 1.4D×35mm; the polyester filament constitutes the core yarn of the covered yarn, the cotton staple fiber and the Tencel staple fiber constitute the outer covering yarn of the covered yarn, and the polyester filament and the Tencel staple fiber are both Y-shaped cross-section fibers.

[0018] This embodiment utilizes three fiber materials: polyester, cotton, and Tencel. Polyester boasts high strength, with a breaking strength ≥4.5 cN / dtex; excellent shape retention, resisting deformation after washing; and quick-drying properties, with a moisture absorption rate of only 0.4%-0.8%, evaporating 50% faster than cotton. However, polyester exhibits poor air permeability, is prone to static electricity, and exhibits poor moisture wicking. Both cotton and Tencel possess excellent moisture wicking and breathability, and are natural and environmentally friendly. However, cotton is susceptible to bacterial growth and exhibits poor durability. Tencel, on the other hand, exhibits excellent antibacterial properties, so the three materials complement each other, resulting in this embodiment exhibiting superior moisture wicking and breathability. Furthermore, this embodiment utilizes Y-shaped cross-sections of polyester filaments and Tencel staple fibers to enhance moisture wicking. These Y-shaped fibers form longitudinal moisture channels, increasing moisture wicking efficiency to twice that of conventional fibers. Furthermore, this embodiment controls the diameter difference between the outer and inner fibers to create a layered structure resembling annual rings. The pores of fibers of different diameters create a gradient capillary pressure difference, promoting unidirectional moisture migration from the inner layer to the outer layer. Specifically, the inner layer of polyester filaments uses ultra-fine denier fibers to form dense moisture-conducting channels, while the outer layer of cotton staple fibers and Tencel staple fibers uses coarse denier fibers to create a rapid evaporation surface.

[0019] This embodiment also discloses a method for preparing a breathable enhanced sports covered yarn:

[0020] Step 1: Antistatic treatment is performed on the polyester filaments, and an antistatic agent with a concentration of 0.3% is sprayed to reduce the spinning friction coefficient to below 0.15; Tencel staple fibers and cotton staple fibers are mixed and opened and sprayed with 0.5% hydrophilic spinning oil (to increase the cohesion by 20%), and the fiber regain is controlled at 11%-12%, and the loose density is reduced to 25kg / m 3 ;

[0021] Step 2: twisting the polyester filament obtained in step 1, twisting in the Z direction (twist 400-500 TPM) to form a porous core yarn structure;

[0022] Step 3: Prepare the covered yarn using a hollow spindle covered spinning machine (such as SSM DP5-C). Feed the yarn in layers: the core layer is fed with the polyester filament obtained in step 2, and the outer layer is fed with a mixed fiber of Tencel staple fiber and cotton staple fiber obtained in step 1. The covering layer retains 15%-20% uncovered area to form a breathable channel.

[0023] Step 4: Perform the following post-processing in sequence: hydroentanglement with a water pressure of 60-80 Bar to improve the bonding strength of the coating layer (peel strength ≥ 2.5N / mm 2 );

[0024] Hydrophilic finishing: the treatment liquid is 3% polyether modified silicone oil, which is used to increase the moisture absorption rate to 15%. The process is the immersion method (temperature 40°C, time 20 minutes);

[0025] Heat setting, temperature: 160-165℃ (lower than the glass transition temperature of Tencel), time: 90 seconds, eliminate internal stress (shrinkage control ≤1.5%).

[0026] This embodiment adjusts the parameters of the hollow spindle covered spinning machine to retain 15% uncovered area of the covering layer, which is conducive to forming a breathable channel, enhancing the air circulation efficiency and the contact area between air and yarn, thereby improving the air permeability and quick-drying effect of the yarn.

[0027] Specifically, in the hollow spindle covering spinning machine, the mixed fiber of Tencel staple fiber and cotton staple fiber is covered with a helix angle of 30°-45°; tension control: the core yarn tension is controlled between 8-10cN, and the outer fiber tension is controlled between 5-6cN.

[0028] Example 2: A breathable enhanced sports covered yarn, comprising 40wt% polyester filament, 25wt% cotton staple fiber, and 35wt% Tencel staple fiber, wherein the polyester filament is specifically fine denier polyester filament (specification: 75D / 144F, breaking strength ≥4.5cN / dtex, boiling water shrinkage ≤3%), the specific specification of the Tencel staple fiber is: 1.2D×38mm, and the specific specification of the cotton staple fiber is: 1.4D×35mm; the polyester filament constitutes the core yarn of the covered yarn, the cotton staple fiber and the Tencel staple fiber constitute the outer covering yarn of the covered yarn, and the polyester filament and the Tencel staple fiber are both Y-shaped cross-section fibers.

[0029] Example 3: A breathable enhanced sports covered yarn, comprising 45wt% polyester filament, 25wt% cotton staple fiber, and 30wt% Tencel staple fiber, wherein the polyester filament is specifically fine denier polyester filament (specification: 75D / 144F, breaking strength ≥4.5cN / dtex, boiling water shrinkage ≤3%), the specific specification of the Tencel staple fiber is: 1.2D×38mm, and the specific specification of the cotton staple fiber is: 1.4D×35mm; the polyester filament constitutes the core yarn of the covered yarn, the cotton staple fiber and the Tencel staple fiber constitute the outer covering yarn of the covered yarn, and the polyester filament and the Tencel staple fiber are both Y-shaped cross-section fibers.

[0030] The present invention can be modified in various ways that are obvious to those skilled in the art, and such modifications are not considered to depart from the scope of the present invention. All such modifications obvious to those skilled in the art are intended to be included within the scope of the present claims.

Claims

1. A breathable and enhanced sports covered yarn, characterized in that: The invention comprises 30 to 45 wt% of polyester filaments, 20 to 30 wt% of cotton staple fibers, and 30 to 50 wt% of tencel staple fibers, wherein the polyester filaments constitute the core yarn of the covered yarn, the cotton staple fibers and the tencel staple fibers constitute the outer covering yarn of the covered yarn, the uniform fiber diameter of the polyester filaments is smaller than the average fiber diameter of the cotton staple fibers and the tencel staple fibers, and the polyester filaments and the tencel staple fibers are both Y-shaped cross-section fibers.

2. A method for preparing a breathable and enhanced sports covered yarn, characterized in that: Step 1: subjecting the polyester filament to an antistatic treatment to reduce the spinning friction coefficient to below 0.15; subjecting the Tencel staple fiber and the cotton staple fiber to a mixed opening treatment and spraying a hydrophilic spinning oil agent; Step 2, twisting the polyester filament obtained in step 1; Step 3: Prepare the covered yarn using a hollow spindle covered spinning machine, feeding the yarn in layers, feeding the polyester filament obtained in step 2 into the core layer, and feeding the mixed fiber of Tencel staple fiber and cotton staple fiber obtained in step 1 into the outer layer, leaving 15%-20% uncovered area in the covering layer to form a breathable channel; Step 4: perform the following post-treatments in sequence: hydroentanglement, hydrophilic finishing and heat setting.

3. The method for preparing the breathable enhanced sports covered yarn according to claim 2, wherein: The hydrophilic finishing adopts an immersion method, wherein the covered yarn is immersed in 3% concentration polyether modified silicone oil, the temperature is controlled at 40±2 degrees Celsius, and the time is 20 minutes.

4. The method for preparing the breathable enhanced sports covered yarn according to claim 2, wherein: The heat setting temperature is controlled at 160-165° C., the time is 80-90 seconds, and the shrinkage is controlled to be ≤1.5%.

5. The method for preparing the breathable enhanced sports covered yarn according to claim 2, wherein: In the hollow spindle covering spinning machine, the mixed fiber of Tencel staple fiber and cotton staple fiber is covered with a spiral angle of 30°-45°; the tension control: the core yarn tension is controlled between 8-10 cN, and the outer fiber tension is controlled between 5-6 cN.