Polyamide 6 spandex with glitter effect and process for the preparation thereof

Abstract

The application discloses a preparation method of nylon 6 elastic yarn with a flash effect, and comprises the following steps: S1, FDY original yarn is led out from an original yarn frame, passes through a spinning rod guide but is not pushed to a spinning rod, is wound around a second roller for three turns, and then passes through a network nozzle; S2, POY original yarn is led out from the original yarn frame, is wound around a first roller for four turns, then sequentially passes through the spinning rod guide, a heat box, a cooling plate and a false twister, is wound around the second roller for four turns, and then passes through the network nozzle; S3, the FDY original yarn and the POY original yarn are combined at the network device, pass through a third roller without winding, then pass through an oil roller and a winding device, and the nylon 6 elastic yarn with the flash effect is obtained; wherein the FDY original yarn is bright trilobal profiled FDY fiber; two different raw materials are adopted, the processing modes of the FDY original yarn and the POY original yarn are different, the two are combined at the network device finally, the cohesion is improved, and the prepared nylon 6 elastic yarn has the flash effect.

Description

Technical Field

[0001] This invention belongs to the field of chemical fiber technology, and specifically relates to a nylon 6 textured yarn with a shimmering effect and its preparation method. Background Technology

[0002] As people's living standards improve, their requirements for fibers and fabrics are gradually increasing. Nylon 6 is considered one of the better varieties of synthetic fiber fabrics due to its moisture absorption. Fabrics woven from it are soft and gentle on the skin, with a supple texture and strong imitation cotton and silk effects, making it increasingly popular. At the same time, as people's quality of life improves, their demands for differentiated and high-end Nylon 6 are also increasing.

[0003] As a component of fabrics, the cross-section of shimmering nylon filament plays a crucial role in the product's appearance and performance. Shimmering nylon filament belongs to the category of profiled bright fibers. Compared to round fibers, profiled fibers exhibit a significant difference in luster. Because profiled fibers have varying radii, the angle of incidence of light incident on their surface differs from that of round fibers, resulting in varying reflection angles after diffuse reflection. Consequently, the luster is inconsistent in different directions. Fabrics made from profiled fibers have a shimmering visual effect due to the varying intensities of reflected light from different directions.

[0004] Conventional nylon 6 textured yarn, processed under the same conditions using the same raw materials, has a relatively limited style and color. Existing technologies, such as Chinese patent application number CN202110451966.7, disclose a method for producing irregularly shaped composite nylon 6 fibers. This method involves passing normal-section POY raw yarn sequentially through a raw yarn frame, a first roller, a yarn cutter, and a twist stopper, followed by heating in a hot box with a heat transfer medium, cooling with air on a cooling plate, and then passing it through a false twister, a second roller, a warp webmer, and nylon-6 FDY flat yarn for composite, a yarn probe, an oiling roller, and winding to obtain irregularly shaped nylon 6 composite yarn. Fabrics woven from this irregularly shaped composite nylon fiber have a soft and smooth texture, improving wearing comfort, but they have low brightness and poor shimmering effect. Summary of the Invention

[0005] To address the aforementioned issues, this invention provides a nylon 6 textured yarn with a shimmering effect and its preparation method. By employing two different types of raw materials and two different processing methods, a product with an excellent shimmering style can be obtained.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A method for preparing nylon 6 textured yarn with a shimmering effect includes the following steps:

[0008] S1: Draw the FDY filament from the filament holder, pass through the yarn guide but do not push it onto the spinning rod, wrap it around the second roller 3 times, and then pass through the network nozzle;

[0009] S2: The POY filament is drawn out from the filament holder, passes through the first roller for 4 turns, then passes through the filament guide, heating box, cooling plate, false twister in sequence, passes through the second roller for 4 turns, and then passes through the network nozzle.

[0010] S3: The FDY raw yarn from step S1 and the POY raw yarn from step S2 are twisted together at the networker by controlling the network air pressure. The yarn passes through the third roller but does not wrap around, and then through the oil roller and the winding device to obtain the nylon 6 textured yarn with the shimmering effect.

[0011] The FDY precursor fiber is a bright trilobal FDY fiber.

[0012] Furthermore, in step S2, the false twister is a friction spindle group type false twister, using any one of the spindle group combinations of 1-5-1, 1-6-1, and 1-7-1.

[0013] Furthermore, in step S2, the false twist speed ratio of the false twister is 1.50-2.00.

[0014] Furthermore, in step S2, the temperature of the hot box is 150-200℃.

[0015] Furthermore, the draw ratio (DR) is 1.200-1.400.

[0016] Furthermore, the winding overfeed rate is -4.0% to 8.0%.

[0017] Furthermore, the winding speed is 450-700 m / min.

[0018] Furthermore, the network air pressure of the network device is 0.4-1.6 bar.

[0019] A nylon 6 textured yarn with a shimmering effect is prepared by the above-described method.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention provides a method for preparing nylon 6 textured yarn with a shimmering effect, which uses two different raw materials, FDY precursor yarn and POY precursor yarn, and the FDY precursor yarn and POY precursor yarn are processed in different ways. Finally, by controlling the size of the network air pressure, the two are twisted together at the network device to improve their cohesion, thereby making the obtained nylon 6 textured yarn more shimmering.

[0022] 2. The FDY precursor used in this invention is a bright trilobal FDY fiber, which is a shimmering nylon filament, while the POY precursor is a dull nylon filament. By combining two raw materials with different light effects, a better contrast can be formed, highlighting the shimmering effect.

[0023] 3. This invention improves the processing method of FDY raw yarn, so that the FDY raw yarn does not wrap around the first roller, which can prevent excessive stretching from making the yarn thinner and affecting the shimmering effect of the yarn. In addition, the FDY raw yarn does not enter the heating box, which can prevent the bright trilobal FDY fiber from being deformed by heat, thereby maintaining the shimmering effect of the trilobal cross section yarn of the bright trilobal FDY fiber. Attached Figure Description

[0024] Figure 1 This is a process flow diagram for producing a type of nylon 6 textured yarn with a shimmering effect. Detailed Implementation

[0025] The following describes a preferred embodiment, with reference to the appendix. Figure 1 To further illustrate the present invention, the endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values; for numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, and these numerical ranges should be considered as specifically disclosed herein; the materials, reagents, etc. used in the following embodiments are commercially available unless otherwise specified; the experimental methods in the following embodiments are conventional methods unless otherwise specified.

[0026] Example 1

[0027] This embodiment provides a method for preparing nylon 6 textured yarn with a shimmering effect, including the following steps:

[0028] S1: Draw the FDY20 / 17 raw yarn from the raw yarn holder, pass through the yarn guide without pushing it onto the spinning rod, wrap it around the second roller 3 times, and then pass through the network nozzle;

[0029] S2: The POY25 / 24 raw yarn is drawn out from the raw yarn holder, passes through the first roller for 4 turns, then passes through the yarn guide, heating box, cooling plate, false twister in sequence, passes through the second roller for 4 turns, and then passes through the network nozzle.

[0030] S3: The FDY20 / 17 raw yarn from step S1 and the POY25 / 24 raw yarn from step S2 are twisted together at the networker by controlling the network air pressure. The yarn passes through the third roller without winding, and then through the oil roller and the winding device to obtain the nylon 6 textured yarn with the shimmering effect, namely 40 / 41 shimmering yarn.

[0031] The FDY20 / 17 precursor yarn is a bright trilobal FDY fiber, which is a shimmering nylon yarn, while the POY25 / 24 precursor yarn is a dull nylon yarn. By combining two raw materials with different light effects, a better contrast can be formed, highlighting the shimmering effect of the finished 40 / 41 shimmering yarn.

[0032] The process parameters of the preparation method are shown in the table below:

[0033] Table 1. Process parameters for nylon 6 textured yarn with a shimmering effect.

[0034]

[0035]

[0036] This embodiment uses two different raw materials: FDY20 / 17 and POY25 / 24. The processing methods for FDY20 / 17 and POY25 / 24 are different. Finally, the two are twisted together at the networker by controlling the network air pressure, improving their cohesion and resulting in a more shimmering 40 / 41 shimmering yarn. This embodiment improves the processing method of FDY20 / 17, preventing it from winding on the first roller, thus preventing excessive stretching that would thin the yarn and affect its shimmering effect. Furthermore, the FDY20 / 17 is not placed in the heating chamber, preventing the bright trilobal FDY fibers from deforming due to heat, thereby maintaining the shimmering effect of the trilobal cross-section yarn.

[0037] This embodiment also provides a nylon 6 textured yarn with a shimmering effect, which is prepared by the above-described method.

[0038] Example 2

[0039] This embodiment provides a method for preparing nylon 6 textured yarn with a shimmering effect, including the following steps:

[0040] S1: Draw the FDY40 / 12 raw yarn from the raw yarn holder, pass through the yarn guide without pushing it onto the spinning bar, wrap it around the second roller 3 times, and then pass through the network nozzle;

[0041] S2: The POY48 / 36 raw yarn is drawn out from the raw yarn holder, passes through the first roller for 4 turns, then passes through the yarn guide, heating box, cooling plate, false twister in sequence, passes through the second roller for 4 turns, and then passes through the network nozzle.

[0042] S3: The FDY40 / 12 raw yarn in step S1 and the POY48 / 36 raw yarn in step S2 are twisted together at the networker by controlling the network air pressure. After passing through the third roller without winding, and then through the oil roller and winding device, the nylon 6 textured yarn with shimmering effect, i.e., 70 / 48 shimmering yarn, is obtained.

[0043] The FDY40 / 12 precursor yarn is a bright trilobal FDY fiber.

[0044] The process parameters of the preparation method are shown in the table below:

[0045] Table 2. Process parameters for nylon 6 textured yarn with shimmering effect.

[0046] YS (vehicle speed) 650m / min DR (draw ratio) 1.285 H1 (Hot Box Temperature) 170℃ false twist ratio 1.65 OF1 (minimum overfeeding rate) -4.8％ 0F3 (Minimum overfeed rate) -4.8％ Ingot assembly 1-6-1 Nozzle core model DH-802 Network air pressure 1.6 bar T1 (untwisting tension) 14.3 T2 (twisting tension) 12.0 K value 0.84

[0047] This embodiment also provides a nylon 6 textured yarn with a shimmering effect, which is prepared by the above-described method.

[0048] Example 3

[0049] This embodiment provides a method for preparing nylon 6 textured yarn with a shimmering effect, including the following steps:

[0050] S1: Draw the FDY30 / 17 raw yarn from the raw yarn holder, pass through the yarn guide without pushing it onto the spinning rod, wrap it around the second roller 3 times, and then pass through the network nozzle;

[0051] S2: The POY36 / 24 raw yarn is drawn out from the raw yarn holder, passes through the first roller for 4 turns, then passes through the yarn guide, heating box, cooling plate, false twister in sequence, passes through the second roller for 4 turns, and then passes through the network nozzle.

[0052] S3: The FDY30 / 17 raw yarn from step S1 and the POY36 / 24 raw yarn from step S2 are twisted together at the networker by controlling the network air pressure. The yarn passes through the third roller but does not wrap around, and then through the oil roller and the winding device to obtain the nylon 6 textured yarn with the shimmering effect, namely 60 / 41 shimmering yarn.

[0053] The FDY30 / 17 precursor yarn is a bright trilobal FDY fiber.

[0054] The process parameters of the preparation method are shown in the table below:

[0055] Table 3. Process parameters for nylon 6 textured yarn with shimmering effect.

[0056] YS (vehicle speed) 600m / min DR (draw ratio) 1.275 H1 (Hot Box Temperature) 168℃ false twist ratio 1.67 OF1 (minimum overfeeding rate) -5.0％ 0F3 (Minimum overfeed rate) -5.0％ Ingot assembly 1-6-1 Nozzle core model DH-802 Network air pressure 1.6 bar T1 (untwisting tension) 11.0 T2 (twisting tension) 9.2 K value 0.84

[0057] This embodiment also provides a nylon 6 textured yarn with a shimmering effect, which is prepared by the above-described method.

[0058] Comparative Example 1

[0059] The difference from Example 1 is that the raw material used in this comparative example is FDY20 / 17 filament. This comparative example provides a method for preparing a nylon 6 textured yarn with a shimmering effect, which includes the following steps:

[0060] Two strands of FDY20 / 17 raw yarn are combined and drawn out through the raw yarn frame. They pass through the yarn guide without being pushed onto the spinning rod, and are wound around the second roller 3 times. Then they pass through the network nozzle, the third roller without being wound, and then through the oil roller and the winding device to obtain the nylon 6 elastic yarn with the shimmering effect.

[0061] The FDY20 / 17 precursor yarn is a bright trilobal FDY fiber.

[0062] Comparative Example 2

[0063] The difference from Example 1 is that the FDY20 / 17 precursor yarn in this comparative example is drawn out from the precursor yarn holder and wound around the first roller 3 times.

[0064] Comparative Example 3

[0065] The difference from Example 1 is that the FDY20 / 17 precursor yarn in this comparative example is drawn out from the precursor yarn rack and then passed through a hot box.

[0066] Implementation effect evaluation

[0067] The following are specific experiments conducted on the nylon 6 textured yarns with a shimmering effect obtained in Examples 1-3 and Comparative Examples 1-3. The experimental results are shown in the table below:

[0068] Table 4. Statistical Table of Experimental Data

[0069]

[0070]

[0071] As can be seen from the above data, the nylon 6 textured yarn prepared by the method of the present invention has a high-brightness shimmering appearance and low crimp, and the fabric is smoother, which can basically meet the application requirements of textiles and fabrics.

[0072] As can be seen from the experimental data of Example 1 and Comparative Example 1, the nylon 6 textured yarn with a shimmering effect provided by the present invention can create a better contrast and highlight its shimmering effect by combining two raw materials with different light effects.

[0073] As can be seen from the experimental data of Example 1 and Comparative Example 2, the method for preparing nylon 6 textured yarn with a shimmering effect provided by the present invention improves the process of FDY raw yarn so that the FDY raw yarn does not wrap around the first roller, thus avoiding excessive stretching that affects the shimmering effect of the yarn.

[0074] As can be seen from the experimental data of Example 1 and Comparative Example 3, the method for preparing nylon 6 textured yarn with a shimmering effect provided by the present invention improves the process of FDY precursor yarn by preventing the FDY precursor yarn from entering the heating box, thus preventing the bright trilobal FDY fiber from being deformed by heat and affecting the shimmering effect.

[0075] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A process for the production of a spandex yarn with a sparkling effect, characterized in that, The method comprises the following steps: S1: the FDY yarn is drawn from the yarn frame, passes through the godet guide but is not pushed onto the spinning rod, is wound 3 times by the second roller, and then passes through the network nozzle; S2: the POY yarn is drawn from the yarn frame, is wound 4 times by the first roller, then passes through the godet guide, the heat box, the cooling plate, the false twister in sequence, is wound 4 times by the second roller, and then passes through the network nozzle; S3: the FDY yarn in step S1 and the POY yarn in step S2 are combined at the network device by controlling the size of the network air pressure, pass through the third roller but are not wound, then pass through the oil roller and the winding device, and the spandex yarn with the sparkling effect is obtained; The FDY yarn is bright trilobal profiled FDY fiber. In step S2, the false twist speed ratio of the false twister is 1.50-2.00, and the temperature of the heat box is 150-200℃. The draft ratio DR of the spandex yarn is 1.200-1.400, the winding overfeed rate is -4.0-8.0%, and the winding speed is 450-700m / min.

2. A process for the production of a spandex yarn with a sparkling effect according to claim 1, characterized in that, In step S2, the false twister is a friction spindle group type false twister, and any one of 1-5-1, 1-6-1, and 1-7-1 spindle group combination is adopted.

3. A process for the production of a spandex yarn with a sparkling effect according to claim 1, characterized in that, The network air pressure of the network device is 0.4-1.6bar.

4. A spandex yarn having a sparkling effect, characterized by, The spandex yarn with the sparkling effect is prepared by the method of any one of claims 1-3.

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