Processing device and technology for recycling lyocell fiber fabric

Abstract

The invention provides a recycling lyocell fiber fabric processing device and a recycling lyocell fiber fabric processing technology, which are used for researching and developing a green, environment-friendly, efficient and energy-saving warping and sizing technology and a fabric forming technology matched with recycling lyocell high-count and high-density fabric on the basis of fully researching the technical performance of recycling lyocell fibers. Serialized recycled lyocell high-count and high-density fabric is formed, and the requirements of high-grade clothing and home textile brands are met. According to the method, the problem of insufficient raw material resources in China can be greatly relieved, meanwhile, a very good demonstration and guiding effect is achieved for resource recycling, and the enterprise development process of integration, technology research and development, production and sales and the like of renewable resources in China is promoted. The research and development of the recycled lyocell high-count and high-density fabric have positive significance in the aspects of environmental protection, energy conservation, emission reduction and promotion of the development of recycled fiber products.

Description

Technical Field

[0001] The invention relates to the technical field of textiles, and in particular to a device and a process for processing recycled lyocell fiber fabrics. Background Art

[0002] Global oil resources are increasingly scarce, the ecological environment is deteriorating, and the side effects and unsustainability of traditional petrochemical technology and products are becoming increasingly significant. In order to alleviate the severe shortage of natural resources, the development and utilization of renewable resources have been put on the historical agenda. The development of recycled lyocell fiber and its products is the recycling and reuse of waste materials. It conforms to the global green development trend and implements my country's green development strategy, giving full play to the green attributes of recycled fiber that comes from nature and belongs to nature. It not only achieves the goal of saving, but also plays an important role in waste materials and realizes the purpose of turning waste materials into treasure. The research and development of the "Recycled Lyocell High-Count and High-Density Fabric" project will promote the development of textile processing technology for recycled cellulose fibers and the development of upstream and downstream industrial technologies for recycled cellulose fiber textiles. It will surely promote the development of my country's recycled cellulose fiber textile industry and guide my country's recycled cellulose industry to comprehensively improve the level of sustainable development.

[0003] Based on this, the present invention provides a recycled lyocell fiber fabric processing device and process, which determines the fiber model most suitable for a target product based on the research and analysis of the structure and physical and chemical properties of the recycled lyocell fiber; selects the most suitable recycled lyocell high-count yarn as the warp and weft yarn of the target product based on the research and analysis of the technical performance indicators of the recycled lyocell high-count yarn; studies and develops green, environmentally friendly, high-efficiency and energy-saving sizing technology and fabric forming process matching the recycled lyocell high-count and high-density fabric; develops and forms a series of recycled lyocell high-count and high-density fabrics to meet the needs of high-end clothing and home textile brands. Summary of the invention

[0004] The purpose of the present invention is to provide a device and process for processing recycled lyocell fiber fabrics to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above object, the present invention provides the following solutions: The present invention provides a process for recycling lyocell fiber fabric, comprising the following steps: S1. Select warp and weft yarns, using 7.4tex high-count yarn as the warp and weft yarns; S2. Warping process: high-speed batch warping machine is used to warp the warp yarn according to the process principle of "low tension, medium speed"; S3. Sizing process: using green and environmentally friendly sizing material and adopting self-sizing four-roller sizing technology to sizing the yarn; S4. The drawing-in process uses a nozzle-type yarn arrangement technology for drawing-in; S5. Weaving process: using air jet loom to weave according to the process of "low back beam, small tension, early opening, multi-layer opening, low air pressure, early weft insertion"; S6. Finishing process: using the anti-wrinkle device of the cloth winding machine to finish the fabric.

[0006] Preferably, in step S1, the 7.4 tex high count yarn is recycled lyocell 7.4 tex compact siro-spun yarn.

[0007] Preferably, in step S2, the unwinding tension of the warping is A1, the warping speed is 500 m / min, the roller pressure is 0.2 MPa, the initial stage of 20-30 m is controlled at 0 pressure, and the automatic threading technology is used for threading before the beam falls.

[0008] Preferably, in step S3, the raw materials of the green environmentally friendly slurry are 12.5 kg CD-50E, 50 kg AS-1 high-performance starch, 50 kg TBS oxidized starch, 2 kg SL-02 wax flakes, 5 kg NP-130 polypropylene resin, 1 kg 963 antistatic agent, and the slurry preparation volume is 1050 liters.

[0009] Preferably, both AS-1 high-performance starch and TBS oxidized starch have a viscosity specification of 7 mPa·s.

[0010] Preferably, in step S3, the sizing tank temperature of the sizing yarn is 85-88°C, the sizing tank viscosity is 6S±0.5S, the sizing rate is 10±1%, the moisture regain is 10±1%, the elongation is less than or equal to 1.0%, the sizing speed is 60-65m / min, and the sizing force is 3.5-5.5kg / cm 2 , post-oiling is adopted; the tension in each zone is: the setting value of the unwinding tension pressure gauge is 0.1-0.4Mpa, the feeding tension is 96-99.9kg, the dry yarn tension is 100-100.5kg, the winding tension is 520kg, and the setting value of the yarn support tension pressure gauge is 0.35-0.43Mpa.

[0011] Preferably, in step S5, the weaving machine tension is 3800±200N, the rear beam position is -1X12, and the warp stop frame position is 2X6; the anti-start gear is set as: the weft stop reversal amount is 0 weft, and the others are 0 weft; the opening time is 290°, the start weft insertion time is 70°, and the weft yarn arrival time is 240°.

[0012] The present invention also provides a processing device for the above-mentioned processing technology, including a KY6081 high-speed batch warping machine, an XS624B extra-wide width sizing machine, a nozzle-type yarn arrangement device, a ZAX9100 air-jet loom and a cloth winding machine anti-wrinkle device. The KY6081 high-speed batch warping machine is provided with a warping machine threading and separating twisting wire device, and the XS624B extra-wide width sizing machine is provided with a speed-adjustable micro-motor waxing device on the sizing machine.

[0013] Compared with the prior art, the present invention has achieved the following beneficial technical effects: The present invention provides a recycling and reuse lyocell fiber fabric processing device and process. On the basis of fully studying the technical performance of recycling and reuse lyocell fiber, the present invention studies and develops green environmental protection, high-efficiency energy-saving sizing technology and fabric forming process that match the recycling and reuse lyocell high-count and high-density fabric, forming a series of recycling and reuse lyocell high-count and high-density fabrics to meet the needs of high-end clothing and home textile brands. The present invention can not only greatly alleviate the problem of insufficient raw material resources in my country, but also play a good demonstration and guiding role in the recycling of resources, and promote the integration of renewable resources in my country, technology research and development, production and sales and other enterprise development processes. The research and development of recycling and reuse lyocell high-count and high-density fabrics has positive significance in terms of green environmental protection, energy conservation and emission reduction, and promoting the development of recycled fiber products. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 The present invention provides a process flow chart for recycling lyocell fiber fabric. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] Recycled Lyocell fiber is a new type of bio-based regenerated cellulose fiber. Its production adopts an emission-free circular pulping and spinning process, and a large amount of cotton waste from textile and clothing processing is used in the raw material composition. It is green, environmentally friendly and recyclable. Compared with similar Lyocell fibers, the recycled Lyocell fiber has a smoother surface and poor cohesion, and its fiber fineness and strength are lower, making it extremely difficult to process it into high-count yarn and high-count and high-density fabrics because it uses cotton waste for pulping.

[0018] Due to the above-mentioned difficulties, the use of recycled lyocell fiber in this field has always been limited, and its excellent characteristics such as soft hand feel, moisture absorption and breathability, affinity and comfort, good fabric drape and excellent shape retention cannot be fully utilized. Therefore, the purpose of the present invention is to provide a recycled lyocell fiber fabric processing device and process to solve the problems existing in the prior art.

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Embodiment 1: This embodiment provides a device and process for processing recycled lyocell fiber fabrics. Taking 269cm Lyo7.4 / Lyo 7.4 787 / 708 5 / 3 satin home textile fabric as an example, the process includes the following steps: S1. Select warp and weft yarns, and use 7.4tex high-count yarns as warp and weft yarns for use in the field of home textiles, which have high requirements for the anti-pilling of the yarns; this embodiment uses recycled Lyocell 7.4tex compact siro-spun yarns, which have been tested and, with reference to the FZ / T12013-2014 "Lyocell Fiber Natural Yarn" standard, the technical quality indicators of the recycled Lyocell 7.4tex compact siro-spun yarns have reached the technical requirements of the standard for superior products, but key indicators such as single yarn breaking strength are lower than those of Lyocell yarns of the same specifications. Therefore, in order to ensure the smooth production of the weaving process, technical research must be carried out in the sizing process to improve the quality of the weaving beam and the sizing strength; Test results are shown in Table 1:

[0021] S2. Warping process, using KY6081 high-speed batch warping machine to warp the warp yarn according to the process principle of "small tension, medium speed"; the warping tension is A1, the warping speed is 500m / min, the drum pressure is 0.2MPa, the initial stage of 20-30 meters is 0 pressure control, and the automatic stranding technology is used for stranding before the shaft is dropped. The automatic stranding technology is realized by the stranding device of the warping machine; The surface of recycled lyocell fiber is smooth, and the internal gaps of the yarn body are large after spinning, and there are more hairiness, which leads to insufficient sizing liquid penetration in the sizing process, making it difficult to produce adhesion between fibers. At the same sizing rate, the sizing liquid covers more and penetrates less, and the weaving bearing capacity of the sizing yarn is weak. Therefore, the sizing yarn adopts the following scheme: S3. Sizing process: using green and environmentally friendly sizing material and adopting self-sizing four-roller sizing technology to sizing the yarn; The raw materials of the green environmentally friendly slurry are 12.5 kg CD-50E, 50 kg AS-1 high-performance starch, 50 kg TBS oxidized starch, 2 kg SL-02 wax flakes, 5 kg NP-130 polypropylene resin, 1 kg 963 antistatic agent, and the slurry mixing volume is 1050 liters. Both AS-1 high-performance starch and TBS oxidized starch adopt a viscosity specification of 7 mpa·s. The XS624B extra-wide sizing machine is equipped with a self-contained four-roller sizing technology and an active clamping sizing mode. The yarn first clings to the pre-pressing roller and enters the pre-wetting slurry pool as the pre-pressing roller rotates. After being soaked, it passes through the pre-pressing pressing point, and then is coated on the lower roller surface of the sizing roller and soaked again. It then passes through the high-pressure squeezing roller to squeeze out the excess slurry and exits the slurry tank vertically. Since the yarn is always clamped by the roller surface during the sizing process and there is no suspended free area, no matter how much the warp density, the yarn twist, the yarn sheet tension, the sizing liquid flushing, etc., the yarn can be made to enter and exit in a straight line, the yarn is evenly arranged without twisting, and the phenomenon of yarn splitting and breaking is less, which greatly improves the sizing quality; wherein, the sizing tank temperature of the sizing yarn is 85-88°C, the sizing tank viscosity is 6S±0.5S, the sizing rate is 10±1%, the regain is 10±1%, the elongation is less than or equal to 1.0%, the sizing speed is 60-65m / min, and the sizing force is 3.5-5.5kg / cm 2 , adopt post-oiling; the tension of each zone is: the setting value of the desizing tension pressure gauge is 0.1-0.4Mpa, the feeding tension is 96-99.9kg, the dry yarn tension is 100-100.5kg, the winding tension is 520kg, and the setting value of the yarn support tension pressure gauge is 0.35-0.43Mpa; by adding an adjustable speed micro-motor waxing device on the sizing machine, the speed of the waxing roller can be adjusted arbitrarily to achieve a reasonable amount of oiling to ensure the stability of the sizing quality; the sizing quality test data are: desizing rate 10.6%; sizing strength 211.3cN, enhancement rate 19.6%; sizing elongation 8.00%, reduction 2.4%; sizing moisture regain 10.7%; good axis rate 85.8%; S4. In the process of drawing in the heald, the nozzle-type yarn arrangement technology is used for drawing in the heald; it not only improves the yarn arrangement efficiency, but also improves the yarn arrangement quality, while greatly reducing the cost of accessories; S5. In the weaving process, a Tsudakoma ZAX9100 air-jet loom is used. To ensure clear opening and reduce "three jump" defects, the process of "low back beam, small tension, early opening, multi-layer opening, low air pressure, and early weft insertion" is adopted for weaving; the on-machine tension of the weaving is 3800±200N, the back beam position is -1X12, and the warp stop frame position is 2X6; the anti-start gear is set as: the weft stop reversal amount is 0 weft, and the others are 0 weft; the opening time is 290°, the weft insertion start time is 70°, and the weft yarn arrival time is 240°; the design adopts a side support combining copper rings and rubber to avoid or eliminate the problem of side support defects on the cloth surface. Since the surface of the fabric is relatively smooth, the cloth roller is prone to slip when winding, resulting in indentations on the fabric surface, affecting the flatness of the fabric surface. To address this phenomenon, a new foreskin was used to increase the friction of the cloth roller, which ensured smooth cloth winding and improved the quality and flatness of the fabric surface. Through tracking tests, the machine stopped 2.2 times in the warp direction for 100,000 wefts and 7.2 times in the weft direction for 100,000 wefts. The first-class product rate off the machine was 86.5%, the weaving defect rate was 2.2%, and the weaving efficiency was 95.2%. S6. Finishing process: the fabric is finished by using the anti-wrinkle device of the cloth rolling machine, which solves the wrinkle problem caused by the production rolling process, eliminates the uneven dyeing caused by the wrinkles of the grey cloth in the printing and dyeing process, and improves the quality of the finished fabric. After testing, the appearance defect score of the fabric is 3.42 points per 100 square yards.

[0022] 269cm7.4tex / 7.4tex 787 / 709 5 / 3 satin recycled lyocell high count and high density fabric samples, tested by Nantong Textile Product Quality Inspection Institute Co., Ltd., the technical indicators meet the technical requirements of superior products specified in the standard Q / 320601MY34-2023 "Recycled Lyocell Fiber Natural Color Fabric", see Table 2 for details:

[0023] Sample 1 (fabric specification 106" recycled lyocell 60×recycled lyocell 60 182×1205 / 3), sample 2 (fabric specification: 106" recycled lyocell 80×recycled lyocell 80 200×180 5 / 3) and sample 3 (fabric specification: 106" recycled lyocell 60X lyocell 60 182x120 5 / 3) were selected for style evaluation. The evaluation results are shown in Table 3:

[0024] From Table 3, we can see that: (1) Compared with the same specification of recycled Lyocell high count and high density fabric, except for the slightly lower breaking strength index of the former, the performance indexes such as breaking elongation, air permeability, moisture permeability, bending stiffness, drape, style, and anti-pilling performance are similar. The analysis believes that this is because the strength of recycled Lyocell fiber is slightly lower than that of Lyocell fiber, and the other properties of the fibers are similar.

[0025] (2) For recycled lyocell high-count and high-density fabrics, under similar fabric tightness, the smaller the yarn density of the fabric, the smaller the crease recovery angle of the fabric, and the smaller the bending stiffness of the fabric; the larger the drape coefficient, the worse the drape; the difference in style indicators such as smooth, warm, soft, and comfortable is not obvious, and the anti-pilling performance is similar.

[0026] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A recycling process for processing lyocell fiber fabrics. Features: The following steps are involved: S1. Select warp and weft yarns, using 7.4tex high-count yarn as the warp and weft yarns; S2. Warping process: high-speed batch warping machine is used to warp the warp yarn according to the process principle of "low tension, medium speed"; S3. Sizing process: using green and environmentally friendly sizing material and adopting self-sizing four-roller sizing technology to sizing the yarn; S4. The drawing-in process uses a nozzle-type yarn arrangement technology for drawing-in; S5. Weaving process: using air jet loom to weave according to the process of "low back beam, small tension, early opening, multi-layer opening, low air pressure, early weft insertion"; S6. Finishing process: using the anti-wrinkle device of the cloth winding machine to finish the fabric.

2. The process for processing recycled lyocell fiber fabric according to claim 1, Features: In step S1, the 7.4 tex high count yarn is made of recycled Lyocell 7.4 tex compact siro-spun yarn.

3. The process for processing recycled lyocell fiber fabric according to claim 1, Features: In step S2, the unwinding tension of the warping is A1, the warping speed is 500 m / min, the roller pressure is 0.2 MPa, the initial stage of 20-30 m is controlled by 0 pressure, and the automatic threading technology is used for threading before the shaft is dropped.

4. The process for processing recycled lyocell fiber fabric according to claim 1, Features: In step S3, the raw materials of the green environmentally friendly slurry are 12.5 kg CD-50E, 50 kg AS-1 high-performance starch, 50 kg TBS oxidized starch, 2 kg SL-02 wax flakes, 5 kg NP-130 polypropylene resin, and 1 kg 963 antistatic agent, and the slurry preparation volume is 1050 liters.

5. The process for processing recycled lyocell fiber fabric according to claim 4, Features: AS-1 high performance starch and TBS oxidized starch both use 7mpa·s viscosity specifications.

6. The process for processing recycled lyocell fiber fabric according to claim 1, Features: In step S3, the sizing tank temperature of the sizing yarn is 85-88°C, the sizing tank viscosity is 6S±0.5S, the sizing rate is 10±1%, the moisture regain is 10±1%, the elongation is less than or equal to 1.0%, the sizing speed is 60-65m / min, and the sizing force is 3.5-5.5kg / cm 2 , post-oiling is adopted; the tension in each zone is: the setting value of the unwinding tension pressure gauge is 0.1-0.4Mpa, the feeding tension is 96-99.9kg, the dry yarn tension is 100-100.5kg, the winding tension is 520kg, and the setting value of the yarn support tension pressure gauge is 0.35-0.43Mpa.

7. The process for processing recycled lyocell fiber fabric according to claim 1, Features: In step S5, the weaving machine tension is 3800±200N, the rear beam position is -1X12, and the warp stop frame position is 2X6; the anti-start gear is set as: the weft stop reversal amount is 0 weft, and the others are 0 weft; the opening time is 290°, the start weft insertion time is 70°, and the weft yarn arrival time is 240°.

8. A processing device used in the process for processing recycled lyocell fiber fabric according to any one of claims 1 to 7, Features: It comprises a KY6081 high-speed batch warping machine, an XS624B extra-wide sizing machine, a nozzle-type yarn arrangement device, a ZAX9100 air-jet loom and a cloth winding machine anti-wrinkle device. The KY6081 high-speed batch warping machine is provided with a warping machine threading and separating twisting wire device, and the XS624B extra-wide sizing machine is provided with a speed-adjustable micro-motor waxing device on the sizing machine.

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