A process for making a translucent high strength yarn

Abstract

A semi-transparent high-strength yarn processing technology belongs to the field of yarn processing technology. The process uses single-fiber polyester or nylon as raw materials and includes three main steps: Step A, winding; Step B, initial twisting, re-twisting, traction treatment, and high-temperature setting and aging treatment to obtain the finished yarn; and Step C, constant-temperature aging treatment. Step B is complex and includes: initial twisting; B1, first traction treatment; B2, high-temperature setting and aging treatment; B3, re-twisting treatment with a false twister; B4, second traction treatment; and B5, winding and forming. Finally, after the constant-temperature aging treatment in Step C, the finished semi-transparent yarn is obtained. This invention's semi-transparent high-strength yarn processing technology requires only a single false twisting machine to produce semi-transparent yarn. Furthermore, by controlling the opening time and interval of the false twister, the transparency of the yarn can be adjusted.

Description

Technical Field

[0001] This invention belongs to the field of yarn processing technology, specifically relating to a semi-transparent high-strength yarn processing technology. Background Technology

[0002] Semi-transparent, sheer fabrics have always been a crucial component of high-end apparel, with significant market demand. Currently, there are two methods for producing such fabrics: One method involves using untwisted raw yarn, bundling the strands together using an air-jetting method, and then weaving it into fabric. Because it's untwisted, this type of yarn has low strength, is not heat-resistant, pills easily, and is difficult to wash. The second method involves first twisting the raw yarn with a doubling machine, then feeding it onto a false twisting machine to further break up the strands before finally weaving it into fabric. This process requires the raw yarn to be threaded through two machines, consuming a large amount of space, and involves complex and labor-intensive manual operation. Furthermore, the false twisting machine applies force very evenly to the strands, making it impossible to achieve adjustable transparency, thus limiting the application scenarios for the produced fabrics. Summary of the Invention

[0003] The present invention mainly addresses the technical problems existing in the prior art and provides a semi-transparent high-strength yarn processing technology.

[0004] 1. The above-mentioned technical problem of the present invention is mainly solved by the following technical solution: a semi-transparent high-strength yarn processing method, wherein the processing steps include:

[0005] Step A: The single fiber filament cake is quantitatively packaged using a winding machine and wound into a bullet-shaped loop on a bobbin;

[0006] Step B: The raw yarn after winding in Step A is placed on the spindle of the false twisting machine for initial twisting, with the twist direction being either Z-axis or S-axis. After initial twisting, it undergoes multiple traction treatments, heat setting, re-twisting treatment by the false twisting machine, and a second traction treatment to obtain the finished yarn. The specific steps for traction treatment, heat setting, and false twisting treatment are as follows:

[0007] B1: First traction treatment to control twist and yarn tension;

[0008] B2: The temperature of the hot box is controlled to perform high-temperature setting and aging treatment on the yarn after the first traction process;

[0009] B3: The false twister is driven by a motor to start and stop at regular intervals. When the false twister is on, it breaks up the original yarn fibers through retwisting to obtain a fluffy and light-transmitting yarn. Retwisting is the reverse of the initial twist. When the false twister stops, the original yarn has only undergone the initial twist to obtain a fine and opaque yarn.

[0010] B4: The second traction process yields a section of fine, opaque yarn and a section of fluffy, semi-transparent finished yarn;

[0011] B5: Winding and shaping;

[0012] Step C: Aging treatment, which involves temperature control and shaping in a steam oven to eliminate internal stress generated during yarn processing in step B.

[0013] Preferably, the monofiber filament in step A is polyester or nylon.

[0014] Preferably, the initial twist of the raw yarn in step B is 280–480 T / M.

[0015] Preferably, in step B, the high-temperature setting and aging treatment of the yarn after the first traction treatment is carried out at a temperature of 170-220°C for a duration of 0.5-1.5 seconds.

[0016] Preferably, in step B, the time interval between the motor driving the false twister to start and stop is 0.5s, and the duration of each operation of the false twister is 1s.

[0017] Preferably, the twist of the yarn in step B is 650-1250 T / M.

[0018] Preferably, the aging treatment in step C is carried out at a temperature of 90℃ to 120℃ for a duration of 2 hours.

[0019] The beneficial effects of this invention are as follows:

[0020] Compared with existing technologies, the invention uses a spindle on a false twisting machine to initially twist the original yarn after winding it. Then, the yarn undergoes a first traction treatment, a high-temperature setting and aging treatment, a false twisting re-twisting treatment, and a second traction treatment in sequence through the false twisting machine. After winding, a section of fine, opaque yarn and a section of fluffy, semi-transparent yarn are obtained. A single false twisting machine can produce semi-transparent finished yarn. It has the advantages of simple operation and small footprint. By controlling the on and off time of the false twisting machine and the time interval between two openings of the false twisting machine, yarns with different light transmittance can be obtained, achieving adjustable yarn transparency. The finished yarn is suitable for weaving semi-transparent fabrics on knitting machines, circular knitting machines, and other textile machinery. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the process flow for step A of the present invention;

[0022] Figure 2 This is a schematic diagram of the process flow for step B of the present invention;

[0023] Figure 3 This is a schematic diagram of the process flow for yarn retwisting in step B of the present invention. Detailed Implementation

[0024] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0025] The following examples, in conjunction with the appendix, illustrate the concepts. Figures 1-3 The structure is shown below, and the technical solution of the present invention will be further described in detail.

[0026] Example: A processing technology for semi-transparent high-strength yarn, such as... Figures 1-3 As shown, the specific production process steps are as follows:

[0027] Step A, as follows Figure 1 As shown, a winding machine is used to quantitatively package the single fiber filament cake into coils and then wind the filaments in a projectile-shaped manner on a bobbin.

[0028] Step B involves placing the raw yarn obtained in Step A onto a spindle on a false twisting machine for initial twisting. The twist direction can be either S-direction or Z-direction. After initial twisting, the yarn undergoes a first traction treatment, heat setting, false twisting re-twisting, and a second potential treatment to obtain the finished yarn. The specific steps are as follows:

[0029] B1, the first traction treatment, controls twist and yarn tension;

[0030] B2, the temperature is controlled in the hot box to perform high-temperature setting and aging treatment on the yarn after the first traction treatment;

[0031] B3, the false twister is driven by a motor controlled by a computer board to start and stop at a time. The false twister performs retwisting on the heated and shaped yarn. The false twister is a rotor-type false twister. Retwisting is the reverse of the initial twist. When the false twister is turned on, it breaks up the original yarn fibers to obtain a fine, solid, opaque yarn. When the false twister is stopped, the yarn only has a fine, solid, opaque yarn obtained through the initial twist.

[0032] B4, after the second traction treatment, a section of fine, opaque yarn and a section of fluffy, semi-transparent finished yarn are obtained;

[0033] B5, winding and shaping;

[0034] Step C, aging treatment, involves temperature control and shaping in a steam oven, while simultaneously eliminating the internal stress generated during yarn processing in step B;

[0035] The monofiber filament cake in step A is made of polyester or nylon;

[0036] In step B, the initial twist of the raw yarn varies depending on the thickness of the raw yarn. Specifically, when the raw yarn thickness is 150D to 300D, the twist is 400T / M to 480T / M; when the raw yarn thickness is 350D to 600D, the twist is 350T / M to 380T / M; and when the raw yarn thickness is 700D to 1000D, the twist is 280T / M to 300T / M.

[0037] In step B, when the hot box performs high-temperature setting and aging treatment on the yarn after the first traction treatment, the temperature varies depending on the yarn material. Specifically, when the yarn material is nylon, the hot box temperature is 170-190℃, and when the yarn material is polyester, the hot box temperature is 200-220℃, with a duration of 0.5-1.5s.

[0038] In step B, the motor that drives the false twister to start and stop is controlled by a computer board. During use, the motor drives the false twister to start and stop and the interval between each start and stop is controlled according to the production needs of the yarn. In this embodiment, the duration of each start-up of the false twister is 1 second, and the interval between the stop of the false twister and the next start is 0.5 seconds. During the time when the false twister stops, the yarn is a fine, solid, and opaque yarn. After the false twister starts, it re-twists the yarn to break up the fibers inside the yarn, and the yarn becomes a fluffy and translucent coarse yarn. The cycle of starting and stopping the false twister can produce a section of fine yarn and a section of coarse yarn twice the length of the fine yarn.

[0039] In step B, when the false twister retwirls the yarn, the twist degree varies depending on the yarn thickness. Specifically, when the yarn thickness is 150D to 300D, the retwisting (false twist) twist degree is 1000T / M to 1250T / M; when the yarn thickness is 350D to 600D, the retwisting (false twist) twist degree is 800T / M to 950T / M; and when the yarn thickness is 700D to 1000D, the retwisting (false twist) twist degree is 650T / M to 750T / M.

[0040] In step C, the temperature of the steamer varies depending on the yarn material. When the yarn is nylon, it is placed in the steamer and heated to 90°C for 2 hours. When the yarn is polyester, it is placed in the steamer and heated to 120°C for 2 hours.

[0041] Finally, the yarn processed in step C is used to knit the desired semi-transparent, high-strength fabric using equipment such as knitting machines or circular knitting machines.

[0042] Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments and many variations are possible. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention should be considered within the protection scope of the present invention.

Claims

1. A processing technology for semi-transparent high-strength yarn, characterized in that: The processing steps include: Step A: The single fiber filament cake is quantitatively packaged using a winding machine and wound into a bullet-shaped loop on a bobbin; Step B: The raw yarn after winding in Step A is placed on the spindle of the false twisting machine for initial twisting, with the twist direction being either Z-axis or S-axis. After initial twisting, it undergoes multiple traction treatments, heat setting, re-twisting treatment by the false twisting machine, and a second traction treatment to obtain the finished yarn. The specific steps for traction treatment, heat setting, and false twisting treatment are as follows: B1: First traction treatment to control twist and yarn tension; B2: The temperature of the hot box is controlled to perform high-temperature setting and aging treatment on the yarn after the first traction process; B3: The false twister is driven by a motor to start and stop at regular intervals. When the false twister is on, it breaks up the original yarn fibers through retwisting to obtain a fluffy and light-transmitting yarn. Retwisting is the reverse of the initial twist. When the false twister stops, the original yarn has only undergone the initial twist to obtain a fine and opaque yarn. B4: The second traction process yields a section of fine, opaque yarn and a section of fluffy, semi-transparent finished yarn; B5: Winding and shaping; Step C: Aging treatment, which involves temperature control and shaping in a steam oven to eliminate internal stress generated during yarn processing in step B. In step B, the time interval between the start and stop of the motor-driven false twister is 0.5s, and the duration of each start-up of the false twister is 1s. The aging treatment in step C is carried out at a temperature of 90℃~120℃ for 2 hours.

2. The semi-transparent high-strength yarn processing technology according to claim 1, characterized in that: In step A, the single fiber filament is polyester or nylon.

3. The semi-transparent high-strength yarn processing technology according to claim 1, characterized in that: In step B, the initial twist of the raw yarn is 280–480 T / M.

4. The semi-transparent high-strength yarn processing technology according to claim 1, characterized in that: In step B, the high-temperature setting and aging treatment of the yarn after the first traction treatment is carried out at a temperature of 170-220℃ for a duration of 0.5-1.5s.

5. The semi-transparent high-strength yarn processing technology according to claim 1, characterized in that: In step B, the twist of the yarn during the retwisting process is 650–1250 T / M.

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