Bulky and flexible yarn

Abstract

To provide a yarn having bulkiness and flexibility. [Solution] The yarn is formed by twisting two to four single yarns together alternately with strong and weak twists, resembling bamboo nodes. Each single yarn comprises a core layer 1 and an outer layer 2, with a hollow layer 3 between the core and outer layers. The hollow layer is formed by twisting the single yarns in opposite directions during the roving and fine spinning processes, and the fibers in the core and outer layers are arranged in opposite directions. The yarn obtained by this invention is bulky and flexible, and not only avoids the looseness and weakness of yarns that result from weak twists alone, but also eliminates the stiffness of yarns that result from strong twists alone, achieving a balance between flexibility, bulkiness, and structural stability. It also has good moisture absorption and breathability, making it suitable for lining yarns, pajama sets, and toweling.

Description

[Technical Field]

[0001] The present invention relates to the technical field of yarn manufacturing, and in particular to yarns having bulk and flexibility. [Background technology]

[0002] The softness and bulkiness of yarns are the most important factors that determine the comfort of fabrics. Particularly in the fields of underwear, home textiles, etc., consumer demands for yarn texture, moisture absorption, and breathability are increasing. The conventional technical solutions for improving the softness and bulkiness of yarns have obvious limitations, and the following problems exist: (1) In conventional technology, the softness and bulkiness of yarns are mainly achieved through post-processing such as chemical dissolution to remove vinylon components from within the yarn to form a hollow structure, immersion in fabric softener, and weight reduction. While these methods can improve texture in the short term, they consume large amounts of water and chemical reagents in the post-processing process, which goes against the current trend of green spinning. Furthermore, even if auxiliary agents such as fabric softeners are used, they are gradually washed away with repeated washing, so their effect does not last long, and they damage the yarn fibers, reducing the strength of the yarn. (2) Some commercially available products aim for flexibility by reducing the number of twists, but this leads to structural loosening of the yarn, a decrease in strength, and the yarn is prone to breakage and pilling. As it is difficult to adapt to spinning situations where durability is required, the range of its use is limited.

[0003] Therefore, it is important to develop a soft yarn that is both flexible and bulky, and also has good moisture absorption and quick-drying properties. Summary of the Invention [Problem to be solved by the invention]

[0004] In order to solve the above problems, the present invention provides a yarn that is bulky and flexible. [Means for solving the problem]

[0005] The technical solution adopted by the present invention is as follows: A bulky and flexible yarn, the yarn being formed by twisting two to four single yarns together with alternating strong and weak twists, like bamboo joints, the single yarn including a core layer and an outer layer, a hollow layer between the core layer and the outer layer, the hollow layer being formed by twisting the single yarns in opposite directions during the roving and fine spinning processes, and the fibers in the core layer and the outer layer being arranged in opposite directions.

[0006] Furthermore, the twist coefficient of the roving twist of the single yarn is 50-100, and the twist coefficient of the fine spinning twist is 290-350.

[0007] Furthermore, the twist direction of the roving is S twist, and the twist direction of the fine spinning is Z twist.

[0008] Furthermore, the single yarn raw material is upland cotton from Xinjiang, China.

[0009] Furthermore, the ratio of the length of the strong twist to the length of the weak twist in the yarn is 4:1 to 5:1. [Effects of the Invention]

[0010] The beneficial effects of the present invention are as follows: (1) The yarn of the present invention is formed by twisting together single yarns containing hollow layers. During the process of processing the single yarns, the twisting directions of the roving and fine spinning are completely opposite, so that a hollow layer is formed in the single yarn, improving the flexibility of the single yarn. The hollow layer structure improves the breathability of the single yarn, and improves the moisture absorption and quick-drying properties of the yarn.

[0011] (2) The yarn obtained by this invention is formed like bamboo nodes by alternating strong and weak twists of 2 to 4 single yarns, which not only avoids the looseness and weakness of yarns that result from weak twists alone, but also eliminates the stiffness of yarns that result from strong twists alone, achieving a balance between flexibility, bulkiness, and structural stability. The resulting yarn is bulky but not weak, delicate but not stiff, and reduces pilling and fuzzing, making it more suitable for applications such as underwear and home textiles. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a cross-sectional view of a single yarn of the present invention; [Figure 2] 1 is a schematic diagram of a thread according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0013] Next, the technical solutions of the present invention will be described clearly and completely with the aid of drawings, so as to enable those skilled in the art to well understand the aspects of the present invention.

[0014] Example 1 As can be seen from Figure 2, the bulky and flexible yarn is formed by twisting two to four single yarns together in alternating strong and weak twists, resembling bamboo joints, with the ratio of strong to weak twist lengths being 4:1 to 5:1.

[0015] As can be seen from Figure 1, the single yarn includes a core layer 1 and an outer layer 2, with a hollow layer 3 provided between the core layer 1 and the outer layer 2. The hollow layer 3 is formed because the twisting directions of the single yarn are opposite during the roving and fine spinning processes. The twist direction during roving is S twist with a twist coefficient of 50 to 100, and the twist direction during fine spinning is Z twist with a twist coefficient of 290 to 350. The fibers in the core layer 1 and outer layer 2 are arranged in opposite directions.

[0016] Example 2 The specific spinning method of the yarn includes the following steps: (1) In the cotton blending and beating process, the process principle is to "beat gently and thoroughly loosen the fibers so as to minimize the amount of fallen cotton." A cotton feeder is used to pluck the raw cotton at a specified ratio, mix the raw materials, and mix them in a cotton blender using the principle of "cotton blending with a time lag." A six-roller cotton opener is used to loosen the fiber clumps with a beater and remove impurities.

[0017] (2) In the carding process, an A186 high-speed carding machine is selected to further remove impurities and short fibers (13 mm in length). The cylinder is set to a standard rotation speed and the gauge is reasonably adjusted. The uniform fiber layer carded by the doffer is agglomerated into a web, which is then pressed by the bell mouth and roller to form a sliver. The unevenness rate of the sliver is 4-6%, the impurity content is less than 0.1%, the short fiber content is 11%, and the number of neps per 1 g of sliver is 40.

[0018] (3) In the combing process, the speed of the combing machine is 500-550 nips / min, the drop rate is limited to 6-9%, the feeding mechanism doubles 3-6 slivers, and then feeds them intermittently at a certain length, the circular comb combs the front end of the fiber, and the top comb combs the rear end of the fiber, and finally a combed sliver is formed.

[0019] (4) In the drawing process, a TM27H type drawing frame is used, three strands are doubled, the uniformity range is 25%, the speed is 800 to 1000 meters / minute, and the CV value of the sliver weight is 3 to 5%. The drawn sliver that has undergone the drawing process is placed in a sliver can and transported to the roving process.

[0020] (5) In the roving process, the principle of the roving process is "set the sliver weight larger, the speed slower, the pressure heavier, the gauge larger, and the twist coefficient larger." The front roller, upper apron, and lower apron for roving must have good winding resistance, and the roving tension should be adjusted to prevent slub formation. The twist direction is S twist, and the twist coefficient is 50-100.

[0021] (6) In the spinning process, two roving yarns are fed to a roller at the same time, and then are drafted, twisted, and wound onto a bobbin. The weight of the cop is 40-60g, the twist direction is Z-twist, and the twist coefficient is 290-350.

[0022] (7) In spinning, two to four single yarns are used to form a thread.

[0023] Fabrics made using the bulky and flexible yarns described above have flexibility, a fluffy texture, and a silky luster without any special post-processing, and also have good moisture absorption and quick-drying properties. [Explanation of symbols]

[0024] 1 core layer 2 Outer layer 3 hollow layer

Claims

1. A bulky and flexible yarn, The yarn is formed like bamboo joints by twisting two to four single yarns together alternately with strong and weak twists, and the single yarn includes a core layer (1) and an outer layer (2), and a hollow layer (3) is provided between the core layer (1) and the outer layer (2). The hollow layer (3) is formed because the twist directions of the single yarns are reversed during the roving and fine spinning processes, and the fibers in the core layer (1) and the outer layer (2) are arranged in opposite directions. A bulky and flexible yarn characterized by:

2. The bulky and flexible yarn according to claim 1, characterized in that the twist coefficient of the roving twist of the single yarn is 50-100, and the twist coefficient of the fine spinning twist is 290-350.

3. 3. The bulky and flexible yarn according to claim 2, wherein the twist direction of the roving is S twist and the twist direction of the fine spinning is Z twist.

4. 2. The bulky and flexible yarn according to claim 1, wherein the single yarn material is upland cotton from Xinjiang, China.

5. 2. The bulky and flexible yarn according to claim 1, wherein the ratio of the length of the strong twist to the length of the weak twist in the yarn is 4:1 to 5:1.

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