A pure spun nylon defect-free ultra-high count yarn and its production method

Abstract

This invention relates to the field of textile technology and provides a flawless, ultra-high-count pure nylon yarn. It is made from pure nylon fiber with a specification of 1.0D×38mm and a yarn count of 100S-140S. Through innovative application of technology in the spinning production process, it revolutionizes existing nylon fiber processing methods, enabling the production of nylon through double-carded and combed processes. This effectively solves a series of technical challenges that prevent the production and application of flawless, ultra-high-count pure nylon fiber using existing technologies, resulting in a qualitative improvement in the quality of nylon products and breaking the pattern that pure nylon fiber cannot be produced and applied in a flawless, ultra-high-count manner. It provides valuable production experience for the production and application of flawless, ultra-high-count pure nylon fiber and offers broad prospects for the development and application of subsequent high-quality fabric products.

Description

Technical Field

[0001] This invention belongs to the field of textile technology, and in particular relates to a pure spun nylon defect-free ultra-high count yarn and its production method. Background Technology

[0002] Nylon fiber, scientifically known as polyamide (PA) fiber, is a general term for polymers containing repeating amide groups in their molecular backbone when used as fibers. Internationally, it is called nylon or Nylon. Because Jinzhou Chemical Fiber Plant was the first factory in my country to synthesize polyamide fiber, it was named "Nylon" domestically. According to international standards, nylon is named according to the number of carbon atoms in the polymer monomers; for example, polyhexamethylene adipamide can be written as Nylon 66.

[0003] Nylon fiber was the first synthetic fiber to be industrially produced and remains a major type of synthetic fiber. There are many varieties. Based on the chemical composition of their macromolecular chains, common nylon fibers include aliphatic PA (such as nylon 6 and nylon 66), alicyclic PA (such as polydodecanoic acid p-dicyclohexylmethanediamine fiber), and aromatic PA (such as nylon 6T and nylon MXD6). Less common nylon fibers include nylon 3, nylon 4, nylon 8, and nylon 9. Differentiated nylons can be obtained by chemically modifying or physically transforming conventional nylon varieties to acquire specific properties.

[0004] Compared with other fibers, nylon fiber has a lasting cooling sensation, making it popular in sportswear fabrics. However, the production of pure nylon is still quite challenging. The pure nylon on the market is either of very low yarn count or of very poor quality, which cannot meet the needs of high-end brands for high-quality, lightweight fabrics. Summary of the Invention

[0005] The purpose of this invention is to provide a pure spun nylon defect-free ultra-high count yarn and its production method, aiming to solve the problems mentioned in the background art.

[0006] The present invention is implemented as follows: a pure spun nylon defect-free ultra-high count yarn is made of pure nylon fiber with a specification of 1.0D×38mm and an English count of 100S-140S.

[0007] A further technical solution is to preferably use a yarn count of 120S (English system).

[0008] Another objective of this invention is to provide a method for producing pure spun nylon defect-free ultra-high count yarn, comprising the following steps:

[0009] Step 1, Raw material conditioning: Before feeding the raw materials, use a specially formulated conditioning solution for 24 hours of conditioning treatment;

[0010] Step 2, Opening and Cleaning: The raw materials after conditioning are first processed by the FA002 disc cotton picker, then by the FA036 blending and opening cotton, and finally by the FA201B carding machine. The main process parameters of each piece of equipment are: FA002 disc beater speed 600r / min, rib extension distance -2mm, gap descent distance 2mm, FA036 carding needle beater speed 200rpm or 240rpm.

[0011] Step 3, Carding: The FA201B carding machine is used for processing. The optimized main process parameters are: sliver weight 20g / 5m, sliver output speed 70m / min, cylinder speed 200rpm, licker-in speed 430rpm, flats speed 195mm / min, back cotton box beater speed 600rpm, cylinder-flats distance 12 / 11 / 11 / 11 / 11 / 11 (unit × 1 inch‰), cylinder-doffer distance 5, cylinder-licker-in distance 7, cylinder-back fixed flats distance 26 / 24 / 22, cylinder-front fixed flats distance 18 / 16 / 14, licker-in-hand and carding plate distance 50 / 40, and high cotton waste control in each cleaner.

[0012] Step 4, carding: The carding is carried out using a fully fixed carding machine with a sliver weight of 18g / 5m, a sliver output speed of 50m / min, a cylinder speed of 160rpm, and a licker-in speed of 330rpm.

[0013] Step 5, Combing: A special combing machine for chemical fibers is used, with a basis weight of 16g / 5m, a combing spacing of 22-24‰ English filaments, a waste cotton spacing of 11mm, a top comb spacing of 1.0×0.65mm, a draft spacing of 16mm, a separating roller clockwise rotation time of 7.8 degrees, a cylinder positioning of 1.45 degrees, a brush insertion depth of 2.0mm into the cylinder, a machine speed of 150 nips / min, and a combed sliver basis weight of 11.00-12.50g / 5m. Production conditions: temperature 26℃-30℃, humidity 60%-70%.

[0014] Step 6, Drawing: To ensure uniform mixing and reduce fiber damage, a two-stage drawing process is used. First, a JWF1310 drawing frame (first stage) is used for processing, followed by an RSB-D22C drawing frame (final stage). The main process parameters are as follows: First stage drawing uses 8 strands, with a weight of 16g / 5m, total draft of 6 times, back zone draft of 1.75 times, roller spacing (front zone × back zone) of 10 × 20mm, and output speed of 200m / min; Final stage drawing uses 5 strands, with a weight of 11.5g / 5m, total draft of 6.9 times, back zone draft of 1.3 times, roller spacing (front zone × back zone) of 13.5 × 22mm, bell mouth specification of 7F / 3.2, and output speed of 250m / min. Soft springs are used for adjustment and shaping.

[0015] Step 7, Roving: Produced using an FA497 roving frame. The main process parameters are: roving weight 2.2g / 10m, twist 4.8 twists / 10cm, total draft 10.46 times, back zone draft 1.19 times, roller spacing (front × middle × back) 10 × 26 × 36mm, nip spacing block 4mm, spindle speed 700rpm. The spindle wings need to be cleaned regularly.

[0016] Step 8, Spinning: The spinning process is carried out using a JWF1510 four-roller compact spinning machine. The main process parameters are: yarn count 120S (English system), total draft ratio 47 times, back zone draft ratio 1.098 times, nip spacer block 2.5mm pressure bar, twist 180 twists / 10cm, roller spacing (front × back) 16 × 24mm, profile tube negative pressure -2600pa~-2800pa, spindle speed 10000rpm, and preferably a special type of traveler.

[0017] Step 9, Winding: The winding machine is produced using a SAVIO Polar L-type automatic winding machine with a winding speed of 800m / min. The electronic yarn clearer channel settings are: N: 5.5, DS×LS: 2.0×2.0, DL×LL: 1.25×15, -D×-L: -20%×18. Winter-specific wax needs to be applied to the winding machine (the amount of wax should be slightly larger to control the process).

[0018] Step 10: Steam the yarn.

[0019] In a further technical solution, in step 1, the health-preserving solution includes 1.5% of a special antistatic agent and 5% water, with the remaining components supplemented using a conventional health-preserving solution.

[0020] A further technical solution involves modifying the rear cotton roll device of the fully fixed-cover carding machine in step 4 to adapt it to the simultaneous feeding of multiple fiber rolls.

[0021] This invention provides a method for producing a flawless, ultra-high-count pure nylon yarn. Through innovative application of technology in the spinning process, it revolutionizes existing nylon fiber processing methods, enabling the production of double-carded nylon yarn using a combing process. This effectively solves a series of technical challenges that prevent the production and application of flawless, ultra-high-count pure nylon fibers using current technology. This significantly improves the quality of nylon products and breaks the existing pattern that pure nylon fibers cannot be produced and applied in a flawless, ultra-high-count manner. It provides valuable production experience for the production and application of flawless, ultra-high-count pure nylon fibers and offers broad prospects for the development and application of high-quality fabrics. Attached Figure Description

[0022] Figure 1 A flowchart illustrating a method for producing a flawless, ultra-high-count pure nylon yarn according to an embodiment of the present invention. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0024] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0025] An embodiment of the present invention provides a pure spun nylon defect-free ultra-high count yarn, which is made of pure nylon fiber with a specification of 1.0D×38mm and an English count of 100S-140S.

[0026] In a preferred embodiment of the present invention, the English count of the yarn is preferably 120S.

[0027] An embodiment of the present invention provides a method for producing pure spun nylon defect-free ultra-high count yarn, comprising the following steps:

[0028] Step 1, Raw material conditioning: Before feeding the raw materials, use a specially formulated conditioning solution for 24 hours of conditioning treatment;

[0029] Step 2, Opening and Cleaning: The raw materials after conditioning are first processed by the FA002 disc cotton picker, then by the FA036 mixed cotton opener (modified), and finally by the FA201B carding machine. The main process parameters of each piece of equipment are: FA002 disc beater speed 600r / min, rib extension distance -2mm, gap descent distance 2mm, FA036 carding needle beater speed 200rpm or 240rpm.

[0030] Step 3, Carding: The FA201B carding machine is used for processing. The optimized main process parameters are: sliver weight 20g / 5m, sliver output speed 70m / min, cylinder speed 200rpm, licker-in speed 430rpm, flats speed 195mm / min, back quilt beater speed 600rpm, cylinder-flats distance 12 / 11 / 11 / 11 / 11 / 11 (unit × 1 inch‰), cylinder-doffer distance 5, cylinder-licker-in distance 7, cylinder-back fixed flats distance 26 / 24 / 22, cylinder-front fixed flats distance 18 / 16 / 14, licker-in-hand and carding plate distance 50 / 40, and high cotton drop control in each cleaner.

[0031] Step 4, carding: The carding is carried out using a fully fixed carding machine with a sliver weight of 18g / 5m, a sliver output speed of 50m / min, a cylinder speed of 160rpm, and a licker-in speed of 330rpm.

[0032] Step 5, Combing: A special combing machine for chemical fibers is used, with a basis weight of 16g / 5m, a combing spacing of 22-24‰ English filaments, a waste cotton spacing of 11mm, a top comb spacing of 1.0×0.65mm, a draft spacing of 16mm, a separating roller clockwise rotation time of 7.8 degrees, a cylinder positioning of 1.45 degrees, a brush insertion depth of 2.0mm into the cylinder, a machine speed of 150 nips / min, and a combed sliver basis weight of 11.00-12.50g / 5m. Production conditions: temperature 26℃-30℃, humidity 60%-70%.

[0033] Step 6, Drawing: To ensure uniform mixing and reduce fiber damage, a two-stage drawing process is used. First, a JWF1310 drawing frame (first stage) is used for processing, followed by an RSB-D22C drawing frame (final stage). The main process parameters are as follows: First stage drawing uses 8 strands, with a weight of 16g / 5m, total draft of 6 times, back zone draft of 1.75 times, roller spacing (front zone × back zone) of 10 × 20mm, and output speed of 200m / min; Final stage drawing uses 5 strands, with a weight of 11.5g / 5m, total draft of 6.9 times, back zone draft of 1.3 times, roller spacing (front zone × back zone) of 13.5 × 22mm, bell mouth specification of 7F / 3.2, and output speed of 250m / min. Soft springs are used for adjustment and shaping.

[0034] Step 7, Roving: Produced using an FA497 roving frame. The main process parameters are: roving weight 2.2g / 10m, twist 4.8 twists / 10cm, total draft 10.46 times, back zone draft 1.19 times, roller spacing (front × middle × back) 10 × 26 × 36mm, nip spacing block 4mm, spindle speed 700rpm. The spindle wings need to be cleaned regularly.

[0035] Step 8, Spinning: The spinning process is carried out using a JWF1510 four-roller compact spinning machine. The main process parameters are: yarn count 120S (English system), total draft ratio 47 times, back zone draft ratio 1.098 times, nip spacer block 2.5mm pressure bar, twist 180 twists / 10cm, roller spacing (front × back) 16 × 24mm, profile tube negative pressure -2600pa~-2800pa, spindle speed 10000rpm, and preferably a special type of traveler.

[0036] Step 9, Winding: The SAVIO Polar L-type automatic winding machine is used for production. The winding speed is 800m / min. The electronic yarn clearer channel settings are: N: 5.5, DS×LS: 2.0×2.0, DL×LL: 1.25×15, -D×-L: -20%×18. Winter-specific wax needs to be applied to the winding (the amount of wax should be slightly larger to control).

[0037] Step 10, steaming the yarn, the parameters and process are shown in the table below:

[0038] Table 1. Steaming process flow and parameters

[0039] parameter Parameter value One-time temperature setting 80 During one constant temperature period 5 minutes One-time temperature setting 110 During one constant temperature period 60 minutes Secondary set temperature 110 Secondary constant temperature 60 minutes working methods 1 Loop count 3 times Cooldown time One hour (the packaging bag does not fog up)

[0040] The following functional effects were achieved by using the above method:

[0041] ① The product meets the technical requirements for superior grade as tested by the National Textile Product Quality Supervision and Testing Center.

[0042] ② Knitted fabrics made from this yarn, tested by the National Certified Inspection and Quarantine Co., Ltd., meet the technical requirements of GB / T 21655.2-2019 "Evaluation of the Moisture Absorption and Quick-drying Properties of Textiles - Part 2: Dynamic Moisture Transfer Method", and have strong moisture absorption and quick-drying effects.

[0043] ③According to the GB / T 4802.3-2008 standard, the fabric made from this yarn shows a significant improvement in anti-friction compared to other fabrics.

[0044] In a preferred embodiment of the present invention, in step 1, the health-preserving solution includes 1.5% of a special antistatic agent and 5% water, and the remaining components are supplemented with a conventional health-preserving solution.

[0045] In a preferred embodiment of the present invention, in step 4, the rear cotton roll device of the fully fixed cover carding machine is adapted to adapt to the simultaneous feeding of multiple rolls of fiber.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for producing pure spun nylon defect-free ultra-high count yarn, characterized in that, Includes the following steps: Step 1, Raw material conditioning: Before feeding the raw materials, use a conditioning solution to condition them for 24 hours; Step 2, Opening and Cleaning: The raw materials after conditioning are first processed by the FA002 disc cotton picker, then by the FA036 blending and opening cotton, and finally by the FA201B carding machine. The process parameters of each machine are as follows: FA002 disc beater speed 600r / min, rib extension distance -2mm, gap descent distance 2mm, FA036 carding needle beater speed 200rpm or 240rpm. Step 3, Carding: The FA201B carding machine is used for processing. The process parameters are as follows: sliver weight 20g / 5m, sliver output speed 70m / min, cylinder speed 200rpm, licker-in speed 430rpm, flats speed 195mm / min, back quilt beater speed 600rpm, cylinder-flats distance 12 / 11 / 11 / 11 / 11 / 11, distance unit ×1inch‰, cylinder-doffer distance 5, cylinder-licker-in distance 7, cylinder-back fixed flats distance 26 / 24 / 22, cylinder-front fixed flats distance 18 / 16 / 14, licker-in-quilts distance 50 / 40, and high cotton waste control in each cleaning unit. Step 4, carding: The carding is carried out using a fully fixed carding machine with a sliver weight of 18g / 5m, a sliver output speed of 50m / min, a cylinder speed of 160rpm, and a licker-in speed of 330rpm. Step 5, Combing: Use a special combing machine for chemical fibers, with a basis weight of 16g / 5m, a combing spacing of 22-24‰ English filaments, a waste cotton spacing of 11mm, a top comb spacing of 1.0×0.65mm, a draft spacing of 16mm, and a separation roller clockwise rotation time of 7.8 degrees; cylinder positioning of 1.45 degrees; a brush insertion depth into the cylinder of 2.0mm; a machine speed of 150 nips / min; and a combed sliver basis weight of 11.00-12.50g / 5m; production conditions: temperature 26℃-30℃, humidity 60%-70%; Step 6, Drawing: A two-stage drawing process is used. First, a JWF1310 drawing frame is used for initial drawing, and then an RSB-D22C drawing frame is used for final drawing. The process parameters are as follows: Initial drawing uses 8 strands, with a weight of 16g / 5m, total draft of 6 times, rear zone draft of 1.75 times, front zone × rear zone roller spacing of 10 × 20mm, and output speed of 200m / min; Final drawing uses 5 strands, with a weight of 11.5g / 5m, total draft of 6.9 times, rear zone draft of 1.3 times, front zone × rear zone roller spacing of 13.5 × 22mm, bell mouth specification of 7F / 3.2, and output speed of 250m / min. Soft springs are used for adjustment and shaping. Step 7, Roving: Produced using an FA497 roving frame with the following process parameters: roving weight 2.2g / 10m, twist 4.8 twists / 10cm, total draft 10.46 times, back zone draft 1.19 times, front × middle × back roller spacing 10 × 26 × 36mm, nip spacing block 4mm, spindle speed 700rpm; Step 8, Spinning: The spinning process is carried out using a JWF1510 four-roller compact spinning machine. The process parameters are as follows: total draft ratio 47 times, back zone draft ratio 1.098 times, nip spacer block 2.5mm pressure bar, twist 180 twists / 10cm, front × back roller spacing 16 × 24mm, profile tube negative pressure -2600pa~-2800pa, spindle speed 10000rpm, and special type of traveler selected. Step 9, Winding: The winding machine is produced using a SAVIO Polar L-type automatic winding machine with a winding speed of 800m / min. The electronic yarn clearer channel is set as follows: N: 5.5, DS×LS: 2.0×2.0, DL×LL: 1.25×15, -D×-L: -20%×18. Winter-specific wax is required for winding. Step 10: Steam the yarn.

2. The method for producing pure spun nylon defect-free ultra-high count yarn according to claim 1, characterized in that, In step 1, the health-preserving solution includes 1.5% of a special antistatic agent and 5% water, with the remaining components supplemented using a conventional health-preserving solution.

3. The method for producing pure spun nylon defect-free ultra-high count yarn according to claim 1, characterized in that, In step 4, the rear cotton lap device of the fully fixed-cover carding machine is adapted to make it suitable for simultaneous feeding of multiple laps of fiber.

4. The method for producing pure spun nylon defect-free ultra-high count yarn according to claim 1, characterized in that, In step 7, the spindle wing walls of the FA497 roving frame need to be cleaned regularly.

5. A method for producing a pure spun nylon defect-free ultra-high count yarn based on any one of claims 1-4, characterized in that, It is made of pure nylon fiber with a specification of 1.0D×38mm and an English count of 100S-140S.

6. The pure spun nylon defect-free ultra-high count yarn according to claim 5, characterized in that, The yarn has an English count of 120S.

Images