Irregular coarse-fine ATY (Air Textured Yarn) and preparation method thereof

Abstract

The invention relates to the technical field of spinning, in particular to irregular coarse-fine ATY and a preparation method thereof. The preparation method comprises the following steps that fiber filaments A are wound and then drafted, then the fiber filaments A and drafted fiber filaments B are jointly subjected to humidification and air deformation, and irregular slub ATY is obtained; the winding is specifically as follows: the fiber filament A is wound on the extension needle. According to the preparation method, a fiber filament A is wound on an extension needle and then subjected to a subsequent air deformation process, the extension needle is wound to enable the fiber filament A to have tension fluctuation and drafting rate change, and irregular thick and thin knots are formed in the axial direction. The irregular coarse-fine ATY can form irregular deep and light colors after being dyed.

Description

Technical Field

[0001] The present invention relates to the technical field of spinning, and particularly relates to an irregular thick and thin ATY and a preparation method thereof. Background Art

[0002] Air textured yarn (ATY) is a kind of textured yarn that uses compressed air as power to cause a series of physical changes such as displacement, opening, entanglement and formation of loops of chemical fiber filaments in a nozzle. It is a complex mixed structure composed of multiple single filaments intertwined, twisted and knotted, etc. For the specific preparation method, refer to Chinese invention patents with publication numbers CN117178085A, CN110453327A and CN113755979A, etc. There are many filament loops with different shapes and sizes distributed on the surface of the air textured yarn, similar to the hairiness of staple fiber yarn, and it has excellent soft properties. Conventional air textured yarns are long filaments with uniformly distributed hairiness, and there are few fancy yarns such as slubs and gradients; and conventional slub air textured yarns are mostly uniform thick and thin knots in terms of the appearance of the yarn, and it is impossible to dye irregular light and dark colors with the same dye, and it is impossible to simulate the non-uniformity of natural fibers, which limits the application range of slub air textured yarns. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to provide an irregular thick and thin ATY and a preparation method thereof, which can simulate the non-uniformity of natural fibers.

[0004] In order to solve the above technical problem, the technical solution adopted by the present invention is: a preparation method of an irregular thick and thin ATY, comprising the following steps: fiber filament A is wound and then drawn, and then humidified and air textured together with the drawn fiber filament B to obtain an irregular thick and thin ATY; The winding specifically is: fiber filament A is wound on an extension needle.

[0005] Another technical solution adopted by the present invention is: an irregular thick and thin ATY prepared by using the above preparation method of the irregular thick and thin ATY.

[0006] The beneficial effect of the present invention lies in: in the preparation method of the irregular thick and thin ATY of the present invention, fiber filament A is wound on an extension needle and then the subsequent air texturing process is carried out. Winding the extension needle causes the fiber filament A to have tension fluctuations and draw ratio changes, forming irregular thick and thin knots in the axial direction. The irregular thick and thin ATY can form irregular light and dark colors after dyeing. Brief Description of the Drawings

[0007] Figure 1 It is a process schematic diagram of the preparation method of the irregular thick and thin ATY in the specific embodiment of the present invention; Figure 2Schematic diagram of the columnar structure extension needle in the specific embodiment of the present invention; Figure 3 Schematic diagram of the dumbbell-shaped structure extension needle in the specific embodiment of the present invention; Figure 4 Schematic diagram of the structure of fiber A after drafting in the embodiment of the present invention; Figure 5 Physical diagram of fiber A after drafting in the embodiment of the present invention; Figure 6 Finished product diagram of irregular thick and thin ATY in the embodiment of the present invention; Figure 7 Fabric finished product diagram of irregular thick and thin ATY in the embodiment of the present invention; Label description: 1. Fiber filament A; 2. First input roller; 3. Extension needle; 4. First drafting roller; 5. Humidifier; 6. Air texturing nozzle; 7. Fiber filament B; 8. Second input roller; 9. Second drafting roller; 10. Overfeed roller; 11. Winding system. Specific embodiment

[0008] To describe the technical content, achieved objectives and effects of the present invention in detail, the following is described in conjunction with the embodiments and accompanied by the drawings.

[0009] Please refer to Figure 1 , a preparation method of irregular thick and thin ATY, comprising the following steps: Fiber filament A is wound and then drafted, and then jointly humidified and air textured with the drafted fiber filament B to obtain irregular thick and thin ATY; The winding is specifically: Fiber filament A is wound around the extension needle.

[0010] From the above description, it can be seen that the beneficial effects of the present invention are as follows: The present invention uses fiber filament A as the sheath yarn and fiber filament B as the core yarn. Fiber filament A is wound around the extension needle and then drafted, humidified and air textured. Winding the extension needle causes tension fluctuations in fiber filament A, making the drafting ratio large and small during subsequent drafting, forming irregular thick and thin knots in the axial direction. Humidification can enhance the texturing effect, improve the flexibility of the fiber, and reduce the breakage phenomenon caused by tension fluctuations. After dyeing, the irregular thick and thin ATY can form irregular light and dark colors, which is closer to the effect of colored spun short fibers, simulating the non-uniformity of natural fibers, and the air texturing provides a hairy effect, improving the competitive advantage of the yarn.

[0011] Please refer to Figure 2 and 3 , further, the extension needle is of columnar structure or dumbbell-shaped structure.

[0012] As described above, the fiber filament A is wound around the middle of a columnar structure or a dumbbell-shaped structure and then enters the drafting roller, generating a tension fluctuation.

[0013] Furthermore, the diameter of the extension needle is 0.5 - 5 cm. When the extension needle is in a dumbbell-shaped structure, this diameter refers to the diameter of the part in contact with the fiber filament A.

[0014] As described above, when the diameter of the extension needle is 0.5 - 5 cm, the phenomenon of thick and thin knots is more obvious.

[0015] Furthermore, the material of the extension needle is ceramic or metal.

[0016] Furthermore, when the extension needle is made of ceramic, it needs to be treated by plowing, and when the extension needle is made of metal, it needs to be chrome-plated. The plowing treatment is: forming a microscopic concave-convex structure similar to a plowed field on the surface.

[0017] As can be seen from the above description, the material of the extension needle is selected as a wear-resistant material to improve the service life and process stability. Both the plowing treatment and the chrome-plating treatment can improve the wear resistance, reduce the friction force, and reduce the phenomena of hairiness and breakage.

[0018] Furthermore, the linear density of the fiber filament A is 50 - 300 D, and the DPF (denier per filament) is 0.5 - 3 D.

[0019] Preferably, the linear density of the fiber filament A is 100 - 150 D, and the DPF is 1 - 2 D.

[0020] As described above, the linear density and DPF are within a certain range to improve the process stability.

[0021] Furthermore, the orientation degree of the fiber filament A is < 60%, and the crystallinity is < 25%.

[0022] As described above, within the orientation degree and crystallinity range of the present invention, a natural extension section will appear on the stress-strain curve of the fiber filament A. When cold stretching the fiber filament A, the stretching ratio should be greater than the first yield point of the stress-strain curve and less than or equal to the ratio of the natural extension section. After the fiber filament A bypasses the extension needle, the tension fluctuates, resulting in a stretching ratio greater than the ratio of the natural extension section or a very small stretching ratio during stretching, forming thick and thin details. If it exceeds this orientation degree and crystallinity range, no thick and thin details will be generated or the generated thick and thin details will be not obvious.

[0023] Furthermore, the fiber filament B is a bicomponent FDY (fully drawn yarn) composed of polyester and PBT (polybutylene terephthalate) or PTT (polytrimethylene terephthalate).

[0024] As described above, the filament B is a bicomponent fiber, which will generate spiral crimping when heated in the subsequent process, providing elasticity for the yarn.

[0025] Furthermore, the filament B is polyester POY (Pre-Oriented Yarn).

[0026] Furthermore, the draft multiple of the filament A during drafting is 1.2 - 2.0.

[0027] Preferably, the draft multiple of the filament A during drafting is 1.4 - 1.7.

[0028] As can be seen from the above description, the draft multiple of the filament A during drafting is 1.2 - 2.0, within the natural extension ratio range.

[0029] Furthermore, the heating temperature during drafting is 120 - 180 °C.

[0030] Preferably, the heating temperature during drafting is 140 - 160 °C.

[0031] As described above, the fiber is drafted under the combined action of force and heat energy, and its macromolecular structure will change, increasing the orientation degree and crystallinity, which helps to enhance the strength and modulus of the fiber.

[0032] Furthermore, the overfeed of the filament A is 5 - 15%, and the overfeed of the filament B is 7 - 20%.

[0033] As described above, the overfeed of the filament A is lower than that of the filament B to adjust the tension of the filament A so that it can be stably fed into the nozzle parallel to the filament B. Otherwise, it is prone to jitter.

[0034] Furthermore, another technical solution adopted by the present invention is: the irregular thick and thin ATY prepared by the above method for preparing irregular thick and thin ATY.

[0035] As described above, the irregular thick and thin ATY can form irregular light and dark colors after dyeing, has good elasticity, has hairiness, and is soft.

[0036] Furthermore, the length of the thick section in the irregular thick and thin ATY is 0.5 - 3 cm.

[0037] Please refer to Figure 1 , furthermore, another technical solution adopted by the present invention is: the equipment used in the above method for preparing irregular thick and thin ATY, including a second drafting roller, a humidifier, an air texturing nozzle, an overfeed roller, and a winding system arranged in sequence. The second drafting roller includes two inlets. At one inlet, a first drafting roller, an extension needle, and a first input roller are arranged in sequence, and a second input roller is arranged at the other inlet.

[0038] As can be seen from the above description, the filament fiber A is not stretched on the second drafting roller.

[0039] Please refer to Figure 1 and 2 , Example 1 of the present invention is: a method for preparing irregular thick and thin ATY, the steps are as follows: Select 135 dtex / 36F polyester POY with a linear density of 100 D, DPF of 1 D, orientation degree of 43%, and crystallinity of 15% as fiber filament A1; Select 75D / 36F bicomponent FDY composed of polyester and PBT as fiber filament B7. The extension needle 3 is a columnar structure with a diameter of 2 cm, made of ceramic, and the surface of the extension needle 3 is treated by plowing.

[0040] The fiber filament A1 passes through the first input roller 2 and then winds around the extension needle 3 once, and then enters the first drafting roller 4, the humidifier 5 and the texturing nozzle 6 in sequence. The heating temperature during drafting is 140 °C, the drafting ratio is 1.4, the overfeed of the filament fiber A1 is 10%, and the schematic diagram of the structure of the filament fiber A1 after drafting is shown in Figure 4 , and the physical diagram is shown in Figure 5 ; The fiber filament B7 passes through the second input roller 8 and then enters the second drafting roller 9, the humidifier 5 and the texturing nozzle 6 in sequence. The heating temperature during drafting is 140 °C, the drafting ratio is 1.03, and the overfeed of the filament fiber B is 12%; The fiber filament A1 and the fiber filament B7 are compounded at the texturing nozzle 6 and then enter the overfeed roller 10 and the winding system 11 in sequence to obtain irregular thick and thin ATY, and the air pressure of the texturing nozzle 6 is 10 bar. The physical diagram of this irregular thick and thin ATY is shown in Figure 6 , and the physical diagram of the fabric woven with this irregular thick and thin ATY is shown in Figure 7 .

[0041] Please refer to Figure 1 and 3 , Example 2 of the present invention is: a method for preparing irregular thick and thin ATY, the steps are as follows: Select 135 dtex / 36F polyester POY with a linear density of 50 D, DPF of 0.5 D, orientation degree < 60%, and crystallinity < 25% as fiber filament A1; Select 75D / 36F bicomponent FDY composed of polyester and PBT as fiber filament B7. The extension needle 3 is a dumbbell-shaped structure with a diameter of 0.5 cm, made of metal, and the surface of the extension needle 3 is chrome-plated.

[0042] The filament A1 winds around the stretching needle 3 after passing through the first input roller 2, and then successively enters the first drafting roller 4, the humidifier 5 and the texturing nozzle 6. The heating temperature during drafting is 120 °C, the drafting ratio is 1.2, and the overfeed of filament A1 is 5%; the filament B7 passes through the second input roller 8 and then successively enters the second drafting roller 9, the humidifier 5 and the texturing nozzle 6. The heating temperature during drafting is 120 °C, the drafting ratio is 1.03, and the overfeed of filament B is 7%; the filament A1 and the filament B7 are compounded at the texturing nozzle 6 and then successively enter the overfeed roller 10 and the winding system 11 to obtain an irregular thick and thin ATY. The air pressure of the texturing nozzle 6 is 10 bar.

[0043] Embodiment 3 of the present invention is: a method for preparing an irregular thick and thin ATY, the steps are: the filament A is drafted after winding around the stretching needle once, and then is jointly drafted, humidified and air-textured with the filament B after drafting to obtain an irregular thick and thin ATY.

[0044] Select 135 dtex / 36F polyester POY with a linear density of 300 D, a DPF of 3 D, an orientation degree < 60%, and a crystallinity < 25% as the filament A; select 75D / 36F bicomponent FDY composed of polyester and PBT as the filament B. The stretching needle is a columnar structure with a diameter of 5 cm, made of metal, and the surface of the stretching needle is chromium-plated; the heating temperature during drafting is 180 °C, the drafting ratio of filament A during drafting is 2.0, the drafting ratio of filament B during drafting is 1.03, the overfeed of filament A is 15%, the overfeed of filament B is 20%, and the air pressure during air-texturing is 10 bar.

[0045] Embodiment 4 of the present invention is: the irregular thick and thin ATY prepared by using the preparation method of Embodiment 1, and the length of the thick section in the irregular thick and thin ATY is 0.5 - 3 cm.

[0046] Embodiment 5 of the present invention is: the equipment used for a method for preparing an irregular thick and thin ATY, including a second drafting roller, a humidifier, a texturing nozzle, an overfeed roller and a winding system arranged in sequence. The second drafting roller includes two inlets, and a first drafting roller, a stretching needle and a first input roller are arranged in sequence at one of the inlets, and a second input roller is arranged at the other inlet.

[0047] In summary, the irregular thick and thin ATY and its preparation method provided by the present invention have the following advantages: 1. Using the bicomponent filament B as the core yarn and the filament A as the sheath yarn, an ATY yarn with a hairy effect is prepared. The yarn is helically curled after being heated and has good elasticity.

[0048] 2. The fiber filament A is wound around the extension needle and then drawn to form irregular thick and thin knots in the axial direction, and irregular light and dark colors can be formed after dyeing.

[0049] 3. Humidifying before entering the texturing nozzle can enhance the texturing effect and reduce the breakage phenomenon caused by tension fluctuations.

[0050] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A preparation method for irregular thick and thin ATY, characterized in that, It includes the following steps: The fiber filament A is wound and then drawn, and then humidified and air-textured together with the drawn fiber filament B to obtain an irregular thick and thin ATY; The winding specifically is: The fiber filament A is wound around an extension needle.

2. The preparation method of the irregular thick and thin detail ATY according to claim 1, characterized in that, The extension needle is in a columnar structure or a dumbbell-shaped structure.

3. The preparation method of the irregular thick and thin ATY according to claim 1, characterized in that, The diameter of the extension needle is 0.5 - 5 cm.

4. The preparation method of the irregular thick and thin ATY according to claim 1, characterized in that, The linear density of the fiber filament A is 50 - 300 D, and the DPF is 0.5 - 3 D.

5. The preparation method of irregular thick and thin detail ATY according to claim 1, characterized in that, The orientation degree of the fiber filament A < 60%, and the crystallinity < 25%.

6. The preparation method of the irregular thick and thin ATY according to claim 1, characterized in that, The fiber filament B is a bicomponent fiber composed of polyester and PBT or PTT.

7. The preparation method of the irregular thick and thin ATY according to claim 1, characterized in that, The draw ratio of the filament fiber A during drawing is 1.2 - 2.

0.

8. The preparation method of the irregular thick and thin detail ATY according to claim 1, characterized in that, The heating temperature during drawing is 120 - 180 °C.

9. The preparation method of the irregular thick and thin ATY according to claim 1, characterized in that, The filament fiber A has an overfeed of 5 - 15%, and the filament fiber B has an overfeed of 7 - 20%.

10. The irregular thick and thin ATY prepared by using the preparation method of the irregular thick and thin ATY according to any one of claims 1 - 9.

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