A method for preparing nylon starburst yarn for 3D hollow-out effect fabric and the fabric itself.

Abstract

This invention relates to the field of chemical fiber fabric technology, specifically to a method for preparing nylon starburst yarn for 3D hollow-out effect fabric, comprising the following steps: Step (1) melt spinning to prepare nylon pre-oriented yarn; Step (2) preparing nylon starburst yarn from the nylon pre-oriented yarn; Step (3) knitting the nylon starburst yarn on a circular weft knitting machine to obtain nylon starburst yarn fabric. The prepared fabric has a hollow-out effect and, under light, exhibits a starry 3D effect. The fabric has a natural and soft style, is crisp and wrinkle-resistant, and perfectly avoids the complex weaving process of lace.

Description

Technical Field

[0001] This invention relates to the field of chemical fiber fabric technology, specifically to a method for preparing nylon starburst yarn for 3D hollowed-out effect fabric, and the fabric prepared using this nylon starburst yarn. Background Technology

[0002] With the continuous progress of the times, consumers, in addition to the comfort of clothing, are paying more attention to the visual aesthetics of products. Innovation has become a breakthrough point for unconventional product development. Conventional products are no longer sufficient to meet people's needs; therefore, finding alternative new products has become a new task for the chemical fiber industry. With the ever-changing trends of the times, cotton and linen clothing, lace, and similar styles have returned to people's attention, creating a retro-fashion trend.

[0003] As a prominent representative of the chemical fiber industry, nylon fiber is also constantly evolving. One notable trend is the development and production of openwork lace-like products. Openwork fiber products are increasingly favored by designers due to their unique style.

[0004] Current lace fabric products are usually made through complex weaving processes, which makes it difficult to reduce the cost of lace fabrics further, making lace products less competitive in the market.

[0005] Therefore, it is necessary to improve nylon fiber-related lace products in order to increase the application of nylon fiber in lace fabric products. Summary of the Invention

[0006] The purpose of this invention is to solve the problem of complex preparation process of nylon fiber in the current process of making lace products, and to provide a method for preparing nylon starburst yarn for 3D hollow effect fabric, as well as the fabric made using the nylon starburst yarn.

[0007] The fabric products prepared using this invention have a natural and soft style, are crisp and wrinkle-resistant, and perfectly replace the complex processes of lace. They align with social development and environmental protection trends, and possess significant economic benefits and application potential.

[0008] Specifically, the present invention adopts the following technical solution:

[0009] A method for preparing nylon starburst yarn for 3D hollowed-out effect fabric includes the following steps:

[0010] Step (1): Melt spinning to prepare nylon pre-oriented yarn:

[0011] First, a one-step spinning process is used for spinning. Specifically, the dried raw material slices are fed into the silo, melted by a screw extruder and accurately metered by a metering pump, and then spun through the spinning box and components.

[0012] Then, with the help of side blowing cooling and oiling the nozzle to eliminate static electricity and increase the bundle cohesion, the yarn passes through the pre-networker, the first guide roller, the main networker, and the second guide roller in sequence to finally obtain nylon pre-oriented yarn, which is then wound for use.

[0013] Step (2), Preparation of nylon starburst yarn:

[0014] Nylon pre-oriented yarn is first stretched at high temperature, and then combined with zero-coil introduction deformation process to prepare nylon star yarn with special geometric shape.

[0015] Specifically: During the preparation process, after the above treatment, some segments of the nylon pre-oriented yarn retain the characteristics of elastic yarn and are called elastic segments, while some segments of the nylon pre-oriented yarn do not undergo elastic deformation and are therefore not elastic and are called stiff segments. The length of the stiff segments is controllable and is controlled within the range of 0.5-2cm.

[0016] This invention utilizes a special high-temperature stretching combined with zero-coil introduction deformation technology to alter the fiber spinning morphology, creating a yarn form that combines elastic and stiff segments. The resulting fabric exhibits a pronounced 3D effect, a perforated surface, and possesses advantages such as stiffness and wrinkle resistance. It is widely used in home textiles and apparel fabrics and has a promising market prospect.

[0017] Preferably, in the high-temperature stretching step (2), the temperature of the hot box is controlled at 200-210℃.

[0018] PA6 has a melting point of around 220°C, while the typical stretching temperature is 160-180°C. This invention sets a higher stretching temperature here, but without reaching the melting point, which can increase the rheological properties of the fiber and make the fiber be in a near-critical state where it is about to stick together but has not actually stuck together. At this time, the bulkiness decreases, thus exhibiting the stiffness of the stiff section.

[0019] As a preferred option, in step (2), the zero-disc introduction deformation process specifically involves removing the introductory disc of the conventional false twister, controlling the false twister friction disc combination to be between 0-5-1 and 0-9-1, and controlling the false twister speed ratio D / Y to be between 2.2 and 2.8.

[0020] The core component for false twisting is the false twister, which works as follows: The outer perimeter of a conventional false twister bushing can be divided into several groups, each with 3-5 friction false twist discs. These discs are slightly interlocked, creating a certain degree of overlap, but they do not contact each other. The yarn passes through the center of the false twister, maintaining contact with the outer edge of each friction disc. The rotation of the friction discs causes the yarn to rotate together. Theoretically, for every rotation of the friction disc, the yarn rotates D / d times (D is the diameter of the friction disc, and d is the diameter of the yarn). Because the yarn diameter is small and the friction disc diameter is large, the D / d value is large, making it easy to achieve a high shrinkage rate and a more fluffy product, which is the effect of the fluffy section of the product. A conventional false twister is a 1-5-1 combination, namely 1 inlet disc, 5 working discs, and 1 outlet disc. The inlet disc controls the twisting section, where the upstream yarn segment of the false twister is twisted; the outlet disc controls the untwisting section, where the downstream yarn segment is untwisted to become textured yarn. This design eliminates the need for a feed disc, resulting in a zero-disc feed design. This increases the feeding friction of the yarn, which, combined with the higher temperature of the preceding heating box, enhances the production of the stiffer yarn section. Consequently, the product exhibits a unique combination of a fluffy and a stiffer yarn section.

[0021] As a preferred option, in step (2), the fineness of the nylon starburst yarn is 20-200D, the draw ratio is controlled at 1-1.25, the oil roller speed is controlled at 0.6-0.8rpm, and the spinning speed is controlled at 430-460m / min.

[0022] Preferably, in step (1), the fineness of the nylon pre-oriented yarn is 24-240D, the number of spinneret holes is controlled at 12-96f, the melting temperature of the melt is controlled at 240-260℃; the pressure of the spinning assembly is set at 15-19.5MPa, the side blowing speed is 0.4-0.5m / s, the air temperature is 18-19.5℃, the humidity is 80-95%, the oiling rate of the nascent fiber is 0.5-1%, and the network pressure is 0.05-0.13MPa.

[0023] Preferably, in step (1), the speed of the first guide roller is 4200-4400 m / min, the speed of the second guide roller is 4200-4400 m / min, the stretching ratio is controlled between 1 and 1.1, and the winding speed is controlled between 4200-4500 m / min.

[0024] A fabric with a 3D hollow effect prepared using nylon starburst yarn prepared by the above method includes the following steps: using the nylon starburst yarn as raw material, the starburst yarn fabric is woven by a knitting process on a circular weft knitting machine; specifically, it is formed by continuously looping unit coils in one direction.

[0025] As a preferred option, the weaving conditions are as follows: the weaving tension of the circular weft knitting machine is controlled at 3-6g; the linear speed is controlled at 200-500m / min; and the rotation speed is controlled at 60-110r / min, so that the nylon starburst yarn fabric with a 3D hollow effect is formed after weaving.

[0026] The beneficial effects of this invention are:

[0027] This invention, by adjusting the production process and rationally controlling the production conditions, produces nylon starburst yarn with special yarn segments. By utilizing the different thicknesses of the nylon starburst yarn segments, the fabric produced can present a hollow effect, have a three-dimensional aesthetic, and possess good breathability, allowing moisture to dissipate into the atmosphere quickly. At the same time, due to the special structural characteristics of the stiffening segment, the fibers are relatively stiff and not easily deformed, thus well meeting the needs of customers.

[0028] The fabric produced has a hollowed-out effect and a starry 3D effect under light. The fabric products have a natural and soft style, are crisp and not easy to wrinkle, and perfectly avoid the complicated weaving process of lace. Attached Figure Description

[0029] Figure 1 This is a comparison diagram of the geometric structure of the nylon starburst yarn (bottom) produced by this invention and the elastic yarn (top) under ideal conditions.

[0030] Figure 2 This invention relates to the 3D hollowed-out effect fabric.

[0031] Figure 3 This is an image showing the effect of the 3D hollowed-out fabric prepared according to the present invention under light conditions. Detailed Implementation

[0032] The representative embodiments shown in the accompanying drawings will now be further refined. It should be understood that the following description is not intended to limit the embodiments to a single preferred embodiment. Rather, it is intended to cover alternatives, modifications, and equivalents that may be included within the substance and scope of the embodiments defined by the appended claims.

[0033] In the following detailed description, reference is made to the accompanying drawings, which form part of this specification, and specific embodiments according to the described embodiments are illustrated by way of example. While these embodiments have been described in sufficient detail to enable those skilled in the art to implement them, it should be understood that these examples are not limiting, allowing for the use of other examples and appropriate modifications without departing from the spirit and scope of the described embodiments.

[0034] Example 1:

[0035] (1) First, 25D / 24f nylon pre-oriented yarn is produced through a unique melt spinning process:

[0036] Specifically, dried raw material slices are fed into a hopper, melted by a screw extruder, and accurately metered by a metering pump before being spun into fibers through a spinning box and components. The melt temperature is controlled between 240-260℃, and the spinning component pressure is set to 18.5MPa. Side-blowing cooling and oiling at the nozzles eliminate static electricity and increase fiber bundle cohesion are employed. The side-blowing air velocity is 0.4m / s, the air temperature is 18℃, and the humidity is 95%. The oiling rate of the nascent fibers is 0.5%. The fibers then sequentially pass through a pre-networker, the first guide roller, and the second guide roller, finally being wound into shape. The networking pressure is 0.05MPa, the first guide roller speed is 4200m / min, the second guide roller speed is 4250m / min, the draw ratio is 1, and the winding speed is 4200m / min.

[0037] (2) Nylon pre-oriented yarn is subjected to special high-temperature stretching combined with zero-coil induction deformation technology to produce nylon starburst yarn with a special geometric shape. Specifically:

[0038] The nylon starburst yarn has a specification of 20D / 24f, with the stiffening section length controlled within the range of 0.8cm. The stretch ratio is controlled at 1.2, the oven temperature is controlled at 205℃, the false twister friction disc combination is controlled at 0-6-1, the false twister speed ratio D / Y is controlled at 2.35, the oil roller speed is controlled at 0.6rpm, and the spinning speed is controlled at 440m / min. After the nylon pre-oriented yarn undergoes a zero-coil introduction texturing process, some segments of the nylon pre-oriented yarn retain the characteristics of elastic yarn as elastic segments, while other segments do not undergo texturing and therefore do not have elasticity, forming stiffening segments. The length of the stiffening segment is controllable, ranging from 0.5-2cm.

[0039] (3) The nylon yarn with special yarn segment effect prepared above is knitted on a circular weft knitting machine to form starburst yarn fabric. The weaving tension is 3g; the linear speed is controlled at 450m / min; and the rotation speed is controlled at 80r / min. The nylon starburst yarn fabric, that is, the 3D hollow effect fabric, is formed by continuously looping unit coils in one direction.

[0040] Example 2:

[0041] (1) Production of 85D / 68f nylon pre-oriented yarn through a unique melt spinning process:

[0042] Specifically, dried raw material slices are fed into a hopper, melted by a screw extruder, and accurately metered by a metering pump before being spun into fibers through a spinning box and components. The melt temperature is controlled between 240-260℃; the spinning component pressure is set at 18MPa. Side-blowing cooling and oiling at the nozzles eliminate static electricity and increase fiber bundle cohesion are used. The side-blowing air velocity is 0.5m / s, the air temperature is 18.5℃, and the humidity is 95%. The oiling rate of the nascent fibers is 0.5%. The fibers then pass sequentially through a pre-networker, the first guide roller, and the second guide roller, finally being wound into shape. The networking pressure is 0.1MPa. The speed of the first guide roller is 4300m / min; the speed of the second guide roller is 4350m / min; the draw ratio is controlled at 1; and the winding speed is 4300m / min. After the nylon pre-oriented yarn is processed by the zero-coil introduction and deformation process, some segments of the nylon pre-oriented yarn retain the characteristics of elastic yarn and are called elastic segments, while some segments of the nylon pre-oriented yarn do not undergo texturing deformation and therefore do not have elasticity and are called stiff segments. The length of the stiff segments is controllable, and the length range of the stiff segments is controlled between 0.5-2cm.

[0043] (2) Nylon pre-oriented yarn is subjected to special high-temperature stretching combined with zero-coil induction deformation technology to produce nylon starburst yarn with a special geometric shape. Specifically:

[0044] The nylon starburst yarn has a specification of 70D / 68f, with the stiffening section length controlled within 2cm. The stretch ratio is controlled at 1.2, the oven temperature is controlled at 208℃, the false twister friction disc combination is controlled at 0-9-1, the false twister speed ratio D / Y is controlled at 2.5, the oil roller speed is controlled at 0.6rpm, and the spinning speed is controlled at 460m / min.

[0045] (3) Nylon starburst yarn with special yarn segment effect is knitted on a circular weft knitting machine to form starburst yarn fabric. The weaving tension is 6g; the linear speed is controlled at 450m / min; and the rotation speed is controlled at 100r / min. The nylon starburst yarn fabric, that is, the 3D hollow effect fabric, is formed by continuously looping unit coils in one direction.

[0046] Figure 2 The image shows the 3D hollowed-out effect fabric prepared according to the present invention. Figure 3 This is an image showing the effect of the 3D hollowed-out fabric prepared according to this invention under different lighting conditions. From Figure 2 and Figure 3 As can be seen, the fabric prepared by this invention has a 3D hollowed-out effect.

[0047] Specifically, this invention utilizes a unique high-temperature stretching combined with zero-coil induction deformation technology to alter the fiber spinning morphology, resulting in a yarn morphology that combines elastic and stiff sections. The resulting fabric exhibits a pronounced 3D three-dimensional effect, with a perforated surface, and possesses advantages such as stiffness and wrinkle resistance.

[0048] This invention, by adjusting the production process and rationally controlling the production conditions, produces nylon starburst yarn with special yarn segments. By utilizing the different thicknesses of the nylon starburst yarn segments, the fabric produced can present a hollow effect, have a three-dimensional aesthetic, and possess good breathability, allowing moisture to dissipate into the atmosphere quickly. At the same time, due to the special structural characteristics of the stiffening segment, the fibers are relatively stiff and not easily deformed, thus well meeting the needs of customers.

[0049] The fabric produced has a hollowed-out effect and a starry 3D effect under light. The fabric products have a natural and soft style, are crisp and not easy to wrinkle, and perfectly avoid the complicated weaving process of lace.

[0050] For ease of explanation, specific naming has been used in the above description to provide a thorough understanding of the described embodiments. However, it will be apparent to those skilled in the art that these specific details are not required to implement the above embodiments. Therefore, the above description of the specific embodiments described herein is presented for illustrative and descriptive purposes. Its purpose is not to exhaustively list or limit the embodiments to the specific, precise forms disclosed. It will be apparent to those skilled in the art that certain modifications, combinations, and variations can be made based on the above teachings.

Claims

1. A method for preparing a nylon starburst yarn for 3D hollow effect fabric, characterized in that: Includes the following steps: Step (1): Melt spinning to prepare nylon pre-oriented yarn: First, a one-step spinning process is used for spinning. Specifically, the dried raw material slices are fed into the silo, melted by a screw extruder and accurately metered by a metering pump, and then spun through the spinning box and components. Then, with the help of side blowing cooling and oiling the nozzle to eliminate static electricity and increase the bundle cohesion, the yarn passes through the pre-networker, the first guide roller, the main networker, and the second guide roller in sequence to finally obtain nylon pre-oriented yarn, which is then wound for use. Step (2), Preparation of nylon starburst yarn: Nylon pre-oriented yarn is first stretched at high temperature, and then combined with zero-coil introduction deformation process to prepare nylon star yarn with special geometric shape. Specifically: During the preparation process, after the nylon pre-oriented yarn is treated by the zero-coil introduction deformation process, some yarn segments of the nylon pre-oriented yarn retain the characteristics of elastic yarn and are called elastic segments, while some yarn segments of the nylon pre-oriented yarn do not undergo texturing deformation and do not have elasticity and are called stiff segments. The length of the stiff segments is controllable, and the length range of the stiff segments is controlled within 0.5-2cm. In step (1), the fineness of the nylon pre-oriented yarn is 24-240D, the number of spinneret holes is controlled between 12-96f, and the melting temperature of the melt is controlled between 240-260℃; the pressure of the spinning assembly is set to 15-19.5MPa, the side blowing speed is 0.4-0.5m / s, the air temperature is 18-19.5℃, the humidity is 80-95%, the oiling rate of the nascent fiber is 0.5-1%, and the network pressure is 0.05-0.13Mpa; In step (2), regarding the zero-disc introduction deformation process, specifically, the introduction disc of the conventional false twister is removed, the false twister friction disc combination is controlled to be 0-5-1 to 0-9-1, and the false twister speed ratio D / Y is controlled between 2.2 and 2.

8.

2. The method for preparing the nylon starburst yarn for 3D hollowed-out effect fabric according to claim 1, characterized in that: In the high-temperature stretching step (2), the temperature of the hot box is controlled at 200-210℃.

3. The preparation method of the nylon starburst yarn for 3D hollow effect fabric according to claim 1 or 2, characterized in that: In step (2), the fineness of the nylon starburst yarn is 20-200D, the stretch ratio is controlled at 1-1.25, the oil roller speed is controlled at 0.6-0.8rpm, and the spinning speed is controlled at 430-460m / min.

4. The method for preparing nylon starburst yarn for 3D hollowed-out effect fabric according to claim 1, characterized in that: In step (1), the speed of the first guide roller is 4200-4400 m / min, the speed of the second guide roller is 4200-4400 m / min, the stretch ratio is controlled between 1 and 1.1, and the winding speed is controlled between 4200-4500 m / min.

5. A 3D hollowed-out effect fabric, characterized in that: Includes the following steps: Using nylon starburst yarn prepared by the preparation method described in any one of claims 1-4 as raw material, starburst yarn fabric is obtained by knitting process on a circular weft knitting machine; specifically, it is formed by continuously looping unit coils in one direction.

6. The 3D hollow effect fabric according to claim 5, characterized in that: The weaving process is as follows: the weaving tension of the circular weft knitting machine is controlled at 3-6g; the linear speed is controlled at 200-500m / min; and the rotation speed is controlled at 60-110r / min. After weaving, a nylon starburst yarn fabric with a 3D hollow effect is formed.

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