Nylon 6 air textured yarn and differentiated production method thereof

Abstract

The invention discloses a differential production method of chinlon 6 air textured yarn, the chinlon 6 air textured yarn comprises core yarn and skin yarn wrapped outside the core yarn, the core yarn is ACY, the skin yarn is FDY, during weaving, the core yarn and the skin yarn synchronously pass through respective bobbin channels and scissor openings, the core yarn passes through a core yarn overfeeding roller, the skin yarn passes through a skin yarn overfeeding roller, and the core yarn and the skin yarn pass through the core yarn overfeeding roller. The core yarn and the skin yarn are subjected to network air pressure plying at a ceramic nozzle, and the plied composite yarn passes through a DR roller and an oil wheel and is wound to obtain the chinlon 6 air textured yarn. The nylon-6 air textured yarn has the advantages that the defect that the conventional ATY is thin after being used for knitting socks is overcome, the prepared nylon-6 air textured yarn not only has smoothness and skin-friendly feeling of the conventional ATY when FDY is used as a raw material, but also combines heavy and soft hand feeling and good elasticity of ACY, and the yarn is endowed with the unique style characteristic. In addition, after the socks are woven, the sock belts are thick and solid and have certain warm keeping capacity, and more possibilities are provided for yarn selection of the fabric in the autumn and winter market.

Description

Technical Field

[0001] The present invention belongs to the technical field of textile fibers, and particularly relates to a polyamide 6 air textured yarn and a differential production method thereof. Background Art

[0002] Air-Textured Yarn (ATY) is a kind of yarn that uses the air jet technology of the jet method to process the filament bundle for interlacing, thereby forming irregular kinked loops. This yarn has a fluffy looped structure, enabling it to possess the characteristics of both filament and staple fiber yarns simultaneously, with a strong woolly feeling, good hand feeling, and excellent covering performance. The key to the production of ATY lies in using a device called a jet texturing nozzle. In this device, the filament enters the nozzle at a relatively low overfeed rate, and the hot air stream impacts along the running direction of the filament bundle, causing it to disperse and eject. This process results in the fibers inside the filament bundle entangling with each other, forming irregular kinked loops, thus endowing the yarn with a fluffy and looped appearance and hand feeling.

[0003] In the production of ATY, FDY is usually used as the raw material for the skin yarn and the core yarn. This choice of raw material helps to ensure the strength and durability of the yarn, while providing good fluffiness and covering property. For example, Chinese Patent with the application number CN202110947580.5 discloses an air textured yarn (ATY) and a manufacturing method thereof. The ATY includes a first filament having a first cross-section and a second filament having a second cross-section adjacent to the first filament. The first cross-section has a substantially circular shape and a degree of deformation (M ratio) less than or substantially equal to 1.3, the second cross-section has a polygonal shape including 3 to 6 lobes, and the difference between the length of the first filament and the length of the second filament is less than or substantially equal to 4%. The air textured yarn prepared by this invention can provide a fluffy, comfortable or cotton-like feeling. However, when using FDY as the skin yarn and core yarn materials, the yarns produced usually exhibit weak elasticity. This characteristic makes the textiles woven from these yarns relatively thin, and prone to loop shedding and difficult to shape during use. To improve this problem, it is usually necessary to mix or match ATY with other types of yarns to enhance the comprehensive performance and durability of the fabric. Summary of the Invention

[0004] To solve the above problems, the present invention provides a polyamide 6 air textured yarn and a differential production method thereof.

[0005] The technical solution of the present invention is as follows:

[0006] One of the objectives of the present invention is to provide a differential production method for nylon 6 air textured yarn. The nylon 6 air textured yarn includes a core yarn and a sheath yarn wrapped around the core yarn. The core yarn is ACY, and the sheath yarn is FDY. During weaving, the core yarn and the sheath yarn are synchronously passed through their respective yarn tube channels and scissor openings. The core yarn passes through the core yarn overfeed roller, and the sheath yarn passes through the sheath yarn overfeed roller. The core yarn and the sheath yarn are pneumatically combined through a network at the ceramic nozzle. The combined composite yarn passes through the DR roller and the oil roller, and the nylon 6 air textured yarn is obtained after winding.

[0007] The overfeed rate of the core yarn overfeed roller through which the ACY passes is 14% - 18%; the overfeed rate of the sheath yarn overfeed roller through which the FDY passes is 14% - 20%.

[0008] Further, the ceramic nozzle is a nozzle from Sunjin of South Korea, and the model is EC4.

[0009] Further, the network air pressure is 10 Bar.

[0010] Further, the speed of the DR roller is 300 - 400 m / min.

[0011] Further, the water supply amount of the core yarn is 0.8 - 1.2 L / h.

[0012] Another objective of the present invention is to provide a nylon 6 air textured yarn obtained by the differential production method of any one of the above-mentioned nylon 6 air textured yarns.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The differential production method for nylon 6 air textured yarn provided by the present invention uses high - fineness ACY as the core layer. Its porous and fluffy structure can significantly improve the volume feeling and warmth retention of the yarn. It uses FDY as the skin layer. The smooth surface characteristic of FDY can endow the yarn with excellent skin - friendliness, and at the same time avoid the itching feeling of traditional pure ACY yarns, meeting the needs of close - fitting clothing. The present invention makes up for the relatively thin style characteristics of conventional ATY yarns after knitting socks. The obtained nylon 6 air textured yarn not only has the smoothness and skin - friendliness when using FDY as the raw material in conventional ATY, but also combines the thick and soft hand feeling and good elasticity of ACY, endowing the yarn with unique style characteristics. In addition, after knitting socks, the sock band is relatively thick and has a certain warmth retention ability, providing more possibilities for the selection of yarns in the autumn and winter fabric market. The present invention also controls the overfeed rate of the core yarn overfeed roller through which the ACY passes at 14% - 18% and the overfeed rate of the sheath yarn overfeed roller through which the FDY passes at 14% - 20%, realizing the uniform coating of the skin layer on the core layer, retaining the smooth appearance of FDY and strengthening the elastic recovery rate of ACY.

[0015] 2. In the present invention, by using a ceramic nozzle and a network air pressure of 10 Bar, the bonding strength of the core-sheath yarn is increased by 30%, the breaking strength of the polyamide 6 air textured yarn is improved, and the weaving breakage rate is significantly reduced.

[0016] 3. The polyamide 6 air textured yarn prepared by the differential production method of the polyamide 6 air textured yarn provided by the present invention has both the soft elasticity of ACY and the wear resistance of FDY, and can be extended to high-value-added fields such as sports protectors and medical compression stockings. Detailed Embodiments

[0017] The following further describes the present invention in conjunction with preferred embodiments. In the present invention, the endpoints and any values within the disclosed ranges are not limited to the exact ranges or values. These ranges or values should be understood to include values close to these ranges or values; for numerical ranges, between the endpoint values of each range, between the endpoint values of each range and individual point values, and between individual point values can be combined with each other to obtain one or more new numerical ranges, and these numerical ranges should be regarded as specifically disclosed herein; the materials, reagents, etc. used in the following embodiments can be obtained from commercial channels without special instructions; the experimental methods in the following embodiments are conventional methods without special instructions.

[0018] Example 1

[0019] This embodiment provides a differential production method of polyamide 6 air textured yarn. The polyamide 6 air textured yarn includes a core yarn and a sheath yarn wrapped around the core yarn. The core yarn is ACY 4070 / 68D30, and the sheath yarn is FDY 70 / 48F. During weaving, the core yarn and the sheath yarn are synchronously passed through their respective yarn tube channels and scissor openings. The core yarn passes through the core yarn overfeed roller, and the sheath yarn passes through the sheath yarn overfeed roller. The core yarn and the sheath yarn are combined by network air pressure at the ceramic nozzle. The combined composite yarn passes through the DR roller and the oil wheel, and the polyamide 6 air textured yarn is obtained through winding.

[0020] In this embodiment, the overfeed rate of the core yarn overfeed roller through which the ACY passes is 18%.

[0021] In this embodiment, the overfeed rate of the sheath yarn overfeed roller through which the FDY passes is 20%.

[0022] In this embodiment, the ceramic nozzle is a nozzle from Korea Nitto, model EC4.

[0023] In this embodiment, the network air pressure is 10 Bar.

[0024] In this embodiment, the speed of the DR roller is 350 m / min.

[0025] In this embodiment, the water supply amount of the core yarn is 1.0 L / h.

[0026] Example 2

[0027] This example provides a differential production method for polyamide 6 air textured yarn. The polyamide 6 air textured yarn includes a core yarn and a skin yarn wrapped around the core yarn. The core yarn is ACY 2040 / 34D32, and the skin yarn is FDY40D / 34F. During weaving, the core yarn and the skin yarn are synchronously passed through their respective yarn tube channels and scissor openings. The core yarn passes through the core yarn overfeed roller, and the skin yarn passes through the skin yarn overfeed roller. The core yarn and the skin yarn are air-jet combined at the ceramic nozzle, and the combined composite yarn passes through the DR roller and the oil roller, and the polyamide 6 air textured yarn is obtained through winding.

[0028] In this example, the overfeed rate of the core yarn overfeed roller through which the ACY passes is 14%.

[0029] In this example, the overfeed rate of the skin yarn overfeed roller through which the FDY passes is 14%.

[0030] In this example, the ceramic nozzle is a nozzle from Sunjin of South Korea, with the model EC4.

[0031] In this example, the air-jet pressure is 10 Bar.

[0032] In this example, the speed of the DR roller is 300 m / min.

[0033] In this example, the water supply amount of the core yarn is 0.8 L / h.

[0034] Example 3

[0035] This example provides a differential production method for polyamide 6 air textured yarn. The polyamide 6 air textured yarn includes a core yarn and a skin yarn wrapped around the core yarn. The core yarn is ACY 40 140 / 96D30, and the skin yarn is FDY140D / 96F. During weaving, the core yarn and the skin yarn are synchronously passed through their respective yarn tube channels and scissor openings. The core yarn passes through the core yarn overfeed roller, and the skin yarn passes through the skin yarn overfeed roller. The core yarn and the skin yarn are air-jet combined at the ceramic nozzle, and the combined composite yarn passes through the DR roller and the oil roller, and the polyamide 6 air textured yarn is obtained through winding.

[0036] In this example, the overfeed rate of the core yarn overfeed roller through which the ACY passes is 16%.

[0037] In this example, the overfeed rate of the skin yarn overfeed roller through which the FDY passes is 20%.

[0038] In this example, the ceramic nozzle is a nozzle from Sunjin of South Korea, with the model EC4.

[0039] In this embodiment, the network air pressure is 10 Bar.

[0040] In this embodiment, the speed of the DR roller is 400 m / min.

[0041] In this embodiment, the water supply of the core yarn is 1.2 L / h.

[0042] Comparative Example 1

[0043] The difference from Example 1 is that the core yarn in this comparative example is FDY.

[0044] Comparative Example 2

[0045] The difference from Example 1 is that the raw materials of the skin yarn and the core yarn are interchanged.

[0046] Evaluation of implementation effect: Comparative Example 1 is a conventional ATY, which has the properties of both filament yarn and staple fiber yarn, has a strong wool feeling and good hand feeling. When knitting socks with the same sock machine size, the knitting style is relatively thin and lacks elasticity; in Comparative Example 2, the yarn cohesion becomes poor, the loops increase, the number of abnormally protruding loops increases, and it is difficult for the sock machine to knit socks and cannot be used for downstream production.

[0047] Comparative Example 3

[0048] The difference from Example 1 is that the overfeed rate of the core yarn overfeed roller through which the ACY passes in this comparative example is 13%. The skin yarn and the core yarn are separated, the cohesion is poor, and the yarn is not formed and cannot be used for downstream production.

[0049] Comparative Example 4

[0050] The difference from Example 1 is that the overfeed rate of the skin yarn overfeed roller through which the FDY passes in this comparative example is 22%. The bonding strength between the skin yarn and the core yarn is poor, there is a phenomenon of net shedding, and it cannot be used for weaving.

[0051] The following is a specific test on the yarns prepared in Examples 1-3 and Comparative Examples 1-4 to further illustrate the excellent effects achieved by the present invention:

[0052] Table 1 Statistical table of test results

[0053]

[0054] The fineness test is carried out with reference to the relevant standards of GB / T14343-2022; the breaking elongation rate and breaking strength are carried out with reference to the relevant standards of GB / T 14344-2022, and the loop density and the number of abnormally protruding loops are carried out with reference to the relevant standards of GB / T 6506-2017.

[0055] From the experimental data of Examples 1-5 in Table 1, it can be seen that the strength and elongation of the polyamide 6 air textured yarn prepared by the present invention are slightly better than those of conventional ATY combined products, and it has a stronger wool-like feeling.

[0056] From the experimental data of Example 1 and Comparative Example 2, it can be seen that using ACY as the core layer and FDY as the skin layer in the present invention can optimize the performance of the yarn.

[0057] From the experimental data of Example 1 and Comparative Examples 3 and 4, it can be seen that by controlling the overfeed rate of the core yarn superfeed roller through which ACY passes at 14%-18% and the overfeed rate of the skin yarn superfeed roller through which FDY passes at 14%-20% in the present invention, the normal shaping of the yarn can be ensured and it can be better applied to downstream weaving.

[0058] Through material innovation, process optimization and structural design, the present invention has achieved a breakthrough in the functionality, comfort and economy of polyamide 6 air textured yarn, providing a cost-effective solution for the development of high-end knitted products. In particular, it fills the urgent need for "lightweight and thick" yarns in autumn and winter warm socks, and has significant technological advancement and market competitiveness.

[0059] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A differential production method for polyamide 6 air textured yarn, characterized in that, The polyamide 6 air-jet textured yarn comprises a core yarn and a skin yarn wrapped around the core yarn. The core yarn is ACY, and the skin yarn is FDY. During weaving, the core yarn and the skin yarn are synchronously passed through their respective yarn tube channels and scissor openings. The core yarn passes through a core yarn overfeed roller, and the skin yarn passes through a skin yarn overfeed roller. The core yarn and the skin yarn are pneumatically combined through network at a ceramic nozzle. The combined composite yarn passes through a DR roller and an oil roller, and the polyamide 6 air-jet textured yarn is obtained after winding. The overfeed rate of the core yarn overfeed roller through which the ACY passes is 14% - 18%; the overfeed rate of the skin yarn overfeed roller through which the FDY passes is 14% - 20%.

2. The differential production method of a polyamide 6 air textured yarn according to claim 1, wherein, The ceramic nozzle is a nozzle of Sunjin of South Korea, and the model is EC4.

3. The differentiated production method of nylon 6 air-textured yarn according to claim 1, characterized in that: The network air pressure is 10 Bar.

4. The differential production method of a polyamide 6 air textured yarn according to claim 1, characterized in that, The speed of the DR roller is 300 - 400 m / min.

5. The differentiated production method of nylon 6 air-textured yarn according to claim 1, characterized in that: The water supply amount of the core yarn is 0.8 - 1.2 L / h.

6. The polyamide 6 air-jet textured yarn prepared by the differential production method of the polyamide 6 air-jet textured yarn according to any one of claims 1 - 5.

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