A method for preparing a silk-like cellulose fiber fabric

Abstract

The present application relates to the technical field of fabric processing, and discloses a preparation method of cellulose fiber silk-like fabric, which comprises the following steps: step one, preparing yarn; step two, winding warp yarn into a weaving shaft by using sectional warping, the warping speed is controlled at 200-300 m / min, and the warping tension is controlled by using a tension piece and a press weight together; step three, in the mode of manual reeding, the yarn on the warp beam is reeded through the stop motion, the heald and the reed one by one, and the reeded yarn is 21400-35000 in number; step four, the reeded warp beam, the stop motion and the heald frame are placed on an air-jet loom to weave, and the width of the woven fabric is 270-280 cm; and step five, dyeing and finishing. The fabric provided by the present application fully retains the excellent properties of lyocell fiber, so that the fabric not only has the smooth hand feeling and luster like silk and the excellent drape like viscose fiber, but also has excellent strength, moisture absorption, air permeability and dimensional stability.

Description

Technical Field

[0001] This invention relates to the field of fabric processing technology, specifically to a method for preparing a cellulose fiber imitation silk fabric. Background Technology

[0002] Silk is composed of protein fibers, possessing excellent biocompatibility with the human body. It is soft, smooth, has a low coefficient of friction, and is highly wearable. The fineness of silk monofilaments and its hollow structure facilitate water distribution, allowing it to absorb moisture from the air and retain moisture, keeping skin feeling cool and comfortable in dry environments. In hot summer conditions, silk's excellent moisture-wicking properties keep the wearer cool and comfortable. It contains 18 essential amino acids, providing the skin with necessary nutrients for health and skincare. However, silk production has always been limited, resulting in high costs that cannot meet the growing consumer demand. Silk fabrics are prone to yellowing after absorbing ultraviolet light, and they are also prone to aging and have poor wrinkle resistance. Imitation silk fabrics, considered a substitute for silk, have seen rapid development with rising consumer demand. However, most imitation silks are made of polyester filaments, resulting in a stiffer feel, insufficient softness, poor moisture absorption and wicking properties, and an unpleasant wearing experience, making them unsuitable for modern fabric requirements. Therefore, it is necessary to develop simulated silk fabrics that optimize the characteristics of real silk while maintaining dimensional stability and wrinkle resistance, without altering its inherent advantages.

[0003] Lyocell fiber is made by crushing cellulose-rich wood into cellulose pulp, dissolving it, and then spinning it. Lyocell fiber is a natural plant fiber, and there is no chemical reaction during processing. It is also biodegradable, making it an excellent green fiber fabric. Lyocell fiber has excellent dry and wet strength. Its dry strength is greater than that of cotton fiber and close to that of polyester fiber. Its strength is the highest among all regenerated cellulose fibers. In addition, Lyocell fiber has the feel of silk fiber and the drape of viscose fiber. It has good moisture absorption and breathability, and it can maintain its appearance without deformation after multiple washes, exhibiting excellent dimensional stability.

[0004] A search revealed a polyester imitation silk fabric disclosed in announcement number CN218112000U. The fabric is made of warp yarns (composite filaments with an elliptical cross-section, including two parallel PET core yarns and an outer nylon covering layer) and weft yarns interwoven in a plain or satin weave, which imitates the structure of real silk. This not only makes the feel similar to real silk fabric, but also improves the wrinkle resistance of the imitation silk fabric. However, the drawback of this fabric is that the function of the imitation silk fabric provided is relatively simple, only improving its wrinkle resistance. At the same time, the fabric is relatively stiff, has low softness, and has a poor wearing experience.

[0005] CN217073643U discloses a polyester viscose imitation silk fabric. The warp yarn of the base fabric layer is made of polyester composite yarn (different polyester filament, soybean protein fiber, chitosan fiber, bamboo fiber), and the weft yarn is made of viscose Tencel core-spun yarn (the covering yarn is viscose fiber, and the core yarn is Tencel filament). This fabric not only has the advantages of silk fabric, but also has the characteristics of wrinkle resistance, crispness, breathability and comfort, antibacterial and mildew prevention, soft hand feel, and skin-friendly and healthy. This fabric improves the problem of the single function of existing imitation silk fabrics. However, its processing technology is also relatively complex, and its cost has not been effectively controlled.

[0006] CN110983786A discloses a method for preparing a blended imitation silk fabric. This fabric improves the performance of the raw materials by treating the polyester fiber, cotton fiber, mercerized cotton and wool fiber separately before blending. After finishing, it is softened to enhance the performance of the finished imitation silk fabric. This fabric makes full use of the characteristics of various raw materials, so that the prepared fabric has excellent strength, toughness, skin-friendliness, softness and luster. However, because this preparation method requires separate treatment of multiple fibers and multiple subsequent treatments, and uses multiple chemical solutions, the preparation process becomes complicated, and the use of chemical solutions will also cause environmental pollution.

[0007] Given that existing imitation silk fabrics on the market have some problems, such as most imitation silk fabrics having relatively limited functions and failing to meet people's increasingly higher requirements for fabrics, while some imitation silk fabrics with other functional properties have achieved other functional properties such as wrinkle resistance, stiffness, antibacterial and mildew prevention by blending multiple fibers or improving the preparation method, these often suffer from complex processing technology, environmental pollution, and no significant reduction in cost. Therefore, a method for preparing cellulose fiber imitation silk fabric is proposed. Summary of the Invention

[0008] The purpose of this invention is to provide a method for preparing cellulose fiber imitation silk fabric to solve the problems mentioned in the background art. The fabric prepared by this invention not only retains the advantages of natural cellulose such as good moisture absorption and wicking properties, softness and smoothness, but also has the dimensional stability of polyester filament imitation silk. In addition, this fabric far surpasses natural silk in terms of luster and feel, and its cost is lower than that of natural silk.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a method for preparing cellulose fiber imitation silk fabric, comprising the following steps;

[0010] Step 1: Prepare the yarn;

[0011] Warp yarn: Lyocell filament, twisted by a filament doubling twister, S twist, twist range 750-850T / M;

[0012] Weft yarn: 80-90% Lyocell fiber and 10-20% silk are blended and spun by Siro compact spinning.

[0013] Step Two: Warping;

[0014] The warp yarns are wound into a warp beam using slit warping, and the warping speed is controlled at 200-300m / min. Tension plates and pressure weights are used to control the warping tension.

[0015] Step 3: Threading the reed;

[0016] By manually threading the reed, the yarns on the warp beam are passed one by one through the stop warp, heddles and reed, with a number of yarns ranging from 21,400 to 35,000.

[0017] Step 4: Weaving;

[0018] The warp beams, stop warp pieces, and heald frames that have been threaded through the reed are placed on an air-jet loom for weaving. The fabric is woven according to the healdrying structure and weft density process parameters to produce a silk-like fabric. The width of the woven fabric is 270-280cm.

[0019] Step 5: Dyeing and Finishing;

[0020] The woven fabric undergoes dyeing and finishing processes, including singeing, bleaching, pre-setting, dyeing, sizing, calendering, and pre-shrinking. After dyeing and finishing, the finished fabric has a width of 250-255cm.

[0021] Preferably, in step one, the specific steps for S-twisting are as follows:

[0022] Y1: Filament is doubled using a filament doubling machine;

[0023] Control the filament feeding speed at 450-500 m / min;

[0024] Set the machine's twist to 400-450 T / M;

[0025] Set the twist segment to 6-8 segments, with each segment increasing the twist by approximately 8-10 T / M;

[0026] Y2: S-twisting is performed using an S-twisting machine;

[0027] The twist range is set to 350-400 T / M;

[0028] The control linear velocity is 80-100 m / min;

[0029] Y3: Final twisting is performed using a final twisting machine;

[0030] The twist range is set to 750-850 T / M;

[0031] The linear velocity is controlled at 40-50 m / min.

[0032] Preferably, in step one, the parameters for Siro compact spinning are configured as follows:

[0033] Yarn twist: Set at 800-850 T / M;

[0034] Yarn stretch: Set to 1.2-1.5 times;

[0035] Spinning temperature and humidity: Control the temperature and humidity between 20-25℃ and the relative humidity between 50-60%.

[0036] Preferably, in step two, the specific steps for controlling the warping tension using tension plates and pressure weights are as follows:

[0037] N1: Tension gauge and tension setting;

[0038] Install the tension gauge on the warping machine, set the tension range of the tension gauge to 3 to 5 N, control the running speed of the warping machine to be between 200 and 300 m / min, and make fine adjustments according to the actual situation;

[0039] N2: Pressure bar arrangement and adjustment;

[0040] At the rear of the warping machine, 3-5 pressure weights are set and adjusted according to design requirements. Sensors are introduced to automatically adjust the position and weight of the pressure weights according to changes in warp yarn tightness. The initial pressure weight is set to 3-5g and adjusted proportionally according to the diameter of the warp beam.

[0041] In the preferred step three, the specific operation method for threading the reed is as follows:

[0042] S1. Using an alternating threading method, the yarn is passed through the stop warp, heddles, and reed one by one:

[0043] During the reed threading process, each group of yarns is threaded through one by one according to the predetermined reed threading order. This alternating threading method ensures that each group of yarns is correctly threaded through and fixed on the reed.

[0044] S2. Select a yarn group to begin threading the reed. When threading the reed, start from the bottom of the fabric, below the heddle, and twist the yarn from one side to the other to form a small loop:

[0045] When you begin threading the reed, select a yarn group and thread the yarn under the heddle from the bottom of the fabric, that is, from below the loom. Then twist it from one side to the other to form a small loop. This ensures that the yarn passes firmly through the heddle and forms a reliable fixing point.

[0046] S3. Save the position of the first small loop. Next, select another yarn group, pass the yarn through the small loop in the previous yarn group, and then form a new small loop:

[0047] During the reed threading process, it is necessary to maintain the position of the first small loop and continue to select the next yarn group for reed threading; at this time, the yarn is passed through the small loop in the previous yarn group to form a new small loop; this can maintain the continuity between each yarn group and ensure the correct position and order of the yarns;

[0048] S4. Repeat steps S2 and S3, following the predetermined reed threading order, threading the yarn through each small loop in all yarn groups to form a large loop:

[0049] In the subsequent reed threading process, steps S2 and S3 need to be repeated. Following the predetermined reed threading sequence, the yarn is threaded through the small loops in all yarn groups one by one. Through this cyclical operation, each yarn can pass through the heddle wire correctly and form a close connection with other yarns, eventually forming a large loop.

[0050] S5. Finally, pass the last yarn group through the reed and out, securing the yarn to the reed:

[0051] In the final step of threading the reed, the last yarn group is passed through the reed and brought out, and then the yarn is secured to the reed; by doing this, all the yarns are secured to the reed, ready for the next step of weaving;

[0052] The functions and benefits of using S1-S5:

[0053] Ensure that each yarn passes correctly through the heddles and stop warps, and that the yarn position on the fabric is accurate.

[0054] Maintain continuity between yarn groups to ensure the correct order and consistency of the yarns;

[0055] Ensure that the yarn forms a reliable fixed point with the weaving components (such as heddles, stop warp, reed, etc.) to prevent the yarn from falling off or shifting.

[0056] By forming large loops, the yarn groups are connected and supported to each other, thereby enhancing the overall stability and balance of the fabric.

[0057] Fixing the yarn on the reed provides a stable foundation for subsequent weaving, enabling efficient weaving operations.

[0058] Preferably, in step four, the heald frame is equipped with 6-10 heald frames, each heald frame is equipped with 4200-4500 heald yarns, and the air-jet loom is equipped with 12-20 sets of auxiliary nozzles, with 2 auxiliary nozzles in each set, and the auxiliary nozzles are arranged at equal intervals.

[0059] Preferably, in step four, the process parameters of the air-jet loom are set as follows: back beam height 6-8, depth 8-10; warp stop height 3-5, depth 5-7; shedding time 290-300°, shedding angle 30-32°; weft insertion time 75-80°, weft arrival time 225-230°.

[0060] The present invention proposes a method for preparing cellulose fiber imitation silk fabric, the beneficial effects of which are:

[0061] (1) The fabric provided by the present invention fully retains the excellent properties of Lyocell fiber, so that the fabric not only has the smooth feel and luster of silk and the excellent drape of viscose fiber, but also has excellent strength, moisture absorption and breathability and dimensional stability, so that the fabric has excellent performance.

[0062] (2) The fabric prepared by the present invention has a better luster and feel than natural silk at a lower cost, and is also superior to natural silk in terms of wearing performance and later use.

[0063] (3) The fabric provided by this invention has a better feel and color than natural silk. At the same time, compared with other imitation silk fabrics, the fabric has better strength, moisture absorption and breathability and dimensional stability. These make the fabric have better performance and better performance in later use.

[0064] (4) The fabric prepared by this invention has excellent biodegradability and is an excellent green fabric. The Lyocell fiber, Modal and silk used are all cellulose fibers or protein fibers, which can be naturally degraded and have no harm to the environment after degradation. Attached Figure Description Detailed Implementation

[0065] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0066] Example 1: This invention provides a technical solution: a method for preparing a cellulose fiber imitation silk fabric, comprising the following steps:

[0067] Step 1, Yarn Preparation:

[0068] 1.1. Warp yarn: Lyocell filament is used, which is twisted by a filament doubling machine, S twist, with a twist range of 800T / M, to enhance the fiber binding and improve strength and abrasion resistance, while making the fabric luster better than silk.

[0069] 1.11: Use a filament doubling machine to perform filament doubling;

[0070] Control the filament feeding speed at 480m / min;

[0071] Set the machine's twist to 420 T / M;

[0072] The twist is set to 8 segments, with each segment increasing the twist by approximately 10 T / M.

[0073] 1.12: S-twisting is performed using an S-twisting machine;

[0074] The twist range is set to 400T / M;

[0075] The control linear velocity is 90 m / min;

[0076] 1.13: Final twisting is performed using a final twisting machine;

[0077] The twist range is set to 800T / M;

[0078] The control linear velocity is 45 m / min

[0079] 1.2. Weft yarn: 85% Lyocell fiber and 15% silk are blended and spun using Siro compact spinning method;

[0080] Yarn twist: set at 820T / M;

[0081] Yarn stretch: set at 1.3 times;

[0082] Spinning temperature and humidity: Control the temperature and humidity at 22℃ and relative humidity at 55%.

[0083] Step 2, Warping Steps:

[0084] 2.1. Preliminary preparations:

[0085] Set the warping speed to 250m / min and make minor adjustments as needed to ensure tension differences between strips and threads.

[0086] Install tension gauges on the warping machine and set the tension to 5N.

[0087] 2.2. Arrangement and adjustment of the pressure rollers:

[0088] Four pressure rollers are installed at the rear of the warping machine and adjusted according to design requirements;

[0089] A sensor is introduced to automatically adjust the position and weight of the pressure weight based on changes in warp yarn tension;

[0090] The initial weight of the pressing roller is set to 4g, and then adjusted proportionally according to the diameter of the weaving beam;

[0091] 3.3. Controlling warping tension:

[0092] The warping tension is controlled by tension plates and pressure weights to ensure smooth yarn stretching;

[0093] Adjust the working status and parameters of the tension plate and pressure weight according to the changes in yarn density and the diameter of the warp beam.

[0094] Step 3, threading the reed:

[0095] 3.1. Using an alternating threading method, the yarns on the warp beam are passed through the stop warp, heddles, and reed one by one;

[0096] 3.2. Select a yarn group to begin threading the reed. When threading the reed, start from the bottom of the fabric, below the loom, and insert the yarn under the heddle wire, twisting it from one side to the other to form a small loop;

[0097] 3.3. Save the position of the first small loop. Next, select another yarn group, pass the yarn through the small loop in the previous yarn group, and form a new small loop on the yarn group.

[0098] 3.4. Repeat the above steps, following the predetermined reed threading order, threading the yarn through the small loops in all yarn groups one by one to form a large loop;

[0099] 3.5. Finally, pass the last yarn group through the reed and out to secure the yarn to the reed.

[0100] Step 4. Weaving steps:

[0101] 4.1. Place the warp beams, stop warp pieces, and heald frames that have passed through the reed onto an air-jet loom for weaving;

[0102] 4.2. Weave the fabric according to the heddle pattern and weft density parameters to produce a silk-like fabric;

[0103] 4.3. The heald frame is equipped with 8 heald frames, and each heald frame is equipped with 4350 heald wires;

[0104] 4.4. The air-jet loom is equipped with 15 sets of auxiliary nozzles, with 2 auxiliary nozzles in each set, and the auxiliary nozzles are arranged at equal intervals;

[0105] 4.5. Set the process parameters for the air-jet loom as follows:

[0106] The rear beam has a height of 7 and a depth of 9.

[0107] The height of the warp stop rack is 4 cm and the depth is 6 cm.

[0108] The opening time is 295°, and the opening angle is 32°;

[0109] The latitude entry time is 78°, and the latitude arrival time is 228°;

[0110] Step 5: Dyeing and finishing. The woven fabric is dyed and finished. The dyeing and finishing process includes singeing, bleaching, pre-setting, dyeing, sizing, calendering and pre-shrinking. After dyeing and finishing, the width of the finished fabric is 253±1cm.

[0111] Experimental Record of Yarn Preparation Steps

[0112] In the yarn preparation step, Lyocell filament was used as the warp yarn material, and Lyocell fiber and silk were mixed as the weft yarn material. The following are the specific experimental records:

[0113] Warp preparation experiment record:

[0114]

[0115] Weft yarn preparation experiment record:

[0116]

[0117] Experimental Record of Warping Steps

[0118] During the warping process, experimental records were kept for setting the warping speed, tension plate settings, and pressure weight adjustments:

[0119] Warping speed test record:

[0120] Experimental group Warping speed setting (m / min) Tension of tension sheet (N) Group 1 250 5

[0121] Experimental record of adjusting the pressure weight:

[0122] Weight Number Initial weight (kg) Warp beam diameter (mm) Adjusted weight (kg) 1 80 200 90 2 80 200 88 3 80 200 85 4 80 200 87

[0123] Experimental Record of Reed Threading Steps

[0124] During the reed threading process, the reed threading process and reed threading quality inspection data were recorded.

[0125] Record of yarn threading process:

[0126] Yarn group Order of threading reeds Description of the reed threading process Group 1 1->2 The warp yarns are threaded into the heddles from the bottom of the fabric and form small loops. Group 2 2->3 The warp yarn is passed from the small loop of the previous yarn group into the new group to form a new small loop. Group 3 3->4 Repeat this process through all yarn groups in sequence to form a large loop. Group 4 4-> Reed The last set of yarns passes through the reed and is secured to it.

[0127] Reed quality inspection data:

[0128] Yarn group yarn position Fixed on the reed Group 1 top yes Group 2 Central yes Group 3 Central yes Group 4 bottom yes

[0129] Weaving Step Experiment Record:

[0130] During the weaving process, the loom process parameters and fabric quality inspection data were recorded.

[0131] Fabric quality inspection data:

[0132] Testing items Detection value Fabric gloss 80 Fabric softness 4.2 Mechanical properties Tensile strength: 300N, flexural strength: 200N Visual Defect Assessment No defects

[0133] To evaluate the quality of the fabric prepared in Example 1, a series of fabric tests were conducted, including physical properties and appearance. The table below shows the fabric quality test data, in which the test results of different indicators are recorded.

[0134] index Test Results gram <![CDATA[80g / m 2 ]]> Fracture strength Latitude: 300N Latitude: 260N abrasion resistance 2000 laps, level 4-5 Gloss 90％ elasticity Vertical: 10% Horizontal: 8% breathability Moderate Ultra-thin transparency excellent Appearance It has a better luster than real silk and is soft and delicate. life Long expected service life and excellent anti-aging properties Shrinkage 4.1% Latitude 3.6%

[0135] The above test data show that the cellulose fiber imitation silk fabric prepared by this method has excellent physical properties and appearance; it has a moderate weight, high strength, and good abrasion resistance and breathability; at the same time, the fabric surface has a luster effect superior to real silk and has a soft and delicate feel; according to estimates, the fabric has a long lifespan and good anti-aging properties.

[0136] Example 2, a method for preparing a cellulose fiber imitation silk fabric, comprising the following steps:

[0137] Step 1, Yarn Preparation:

[0138] 1.1. Warp yarn: Lyocell filament is used, which is twisted by a filament doubling machine, S twist, with a twist range of 850T / M, to enhance the fiber binding and improve strength and abrasion resistance, while making the fabric luster better than silk.

[0139] The specific steps for S-twisting are as follows:

[0140] 1.11: Use a filament doubling machine to perform filament doubling;

[0141] Control the filament feeding speed at 500m / min;

[0142] Set the machine's twist to 400 T / M;

[0143] The twist is set to 8 segments, with each segment increasing the twist by approximately 8 T / M.

[0144] 1.12: S-twisting is performed using an S-twisting machine;

[0145] The twist range is set to 350T / M;

[0146] The control linear velocity is 80 m / min;

[0147] 1.13: Final twisting is performed using a final twisting machine;

[0148] The twist range is set to 850T / M;

[0149] The control linear velocity is 50 m / min;

[0150] 1.2. Weft yarn: 88% Lyocell fiber and 12% silk are blended and spun using Siro compact spinning method;

[0151] Yarn twist: set at 800T / M;

[0152] Yarn stretch: set at 1.2 times;

[0153] Spinning temperature and humidity: Control the temperature and humidity at 25℃ and relative humidity at 50%.

[0154] Step 2, Warping Steps:

[0155] 2.1. Preliminary preparations:

[0156] The warping speed is set to 230m / min, and fine-tuned according to the actual situation to ensure the tension difference between strips and threads;

[0157] Install tension gauges on the warping machine and set the tension range to 5N.

[0158] 2.2. Arrangement and adjustment of the pressure rollers:

[0159] Five pressure rollers are installed at the rear of the warping machine and adjusted according to design requirements;

[0160] A sensor is introduced to automatically adjust the position and weight of the pressure weight based on changes in warp yarn tension;

[0161] The initial weight of the pressing roller is set to 5g, and then adjusted proportionally according to the diameter of the weaving beam;

[0162] 3.3. Controlling warping tension:

[0163] The warping tension is controlled by tension plates and pressure weights to ensure smooth yarn stretching;

[0164] Adjust the working status and parameters of the tension plate and pressure weight according to the changes in yarn density and the diameter of the warp beam.

[0165] Step 3, threading the reed:

[0166] 3.1. Using an alternating threading method, the yarns on the warp beam are passed through the stop warp, heddles, and reed one by one;

[0167] 3.2. Select a yarn group to begin threading the reed. When threading the reed, start from the bottom of the fabric, below the loom, and insert the yarn under the heddle wire, twisting it from one side to the other to form a small loop;

[0168] 3.3. Save the position of the first small loop. Next, select another yarn group, pass the yarn through the small loop in the previous yarn group, and form a new small loop on the yarn group.

[0169] 3.4. Repeat the above steps, following the predetermined reed threading order, threading the yarn through the small loops in all yarn groups one by one to form a large loop;

[0170] 3.5. Finally, pass the last yarn group through the reed and out to secure the yarn to the reed.

[0171] Step 4. Weaving steps:

[0172] 4.1. Place the warp beams, stop warp pieces, and heald frames that have passed through the reed onto an air-jet loom for weaving;

[0173] 4.2. Weave the fabric according to the heddle pattern and weft density parameters to produce a silk-like fabric;

[0174] 4.3. The heald frame is equipped with 7 heald frames, and each heald frame is equipped with 4300 heald wires;

[0175] 4.4. The air-jet loom is equipped with 18 sets of auxiliary nozzles, with 2 auxiliary nozzles in each set, and the auxiliary nozzles are arranged at equal intervals;

[0176] 4.5. Set the process parameters for the air-jet loom as follows:

[0177] The rear beam has a height of 8 and a depth of 8.

[0178] The height of the warp stop rack is 5 cm and the depth is 6 cm.

[0179] The opening time is 295°, and the opening angle is 30°;

[0180] The latitude entry time is 75°, and the latitude arrival time is 230°;

[0181] Step 5: Dyeing and finishing. The woven fabric is dyed and finished. The dyeing and finishing process includes singeing, bleaching, pre-setting, dyeing, sizing, calendering and pre-shrinking. After dyeing and finishing, the width of the finished fabric is 250±1.2cm.

[0182] To evaluate the quality of the fabric prepared in Example 2, a series of fabric tests were conducted, including physical properties and appearance. The table below shows the fabric quality test data, in which the test results of different indicators are recorded.

[0183] index Test Results abrasion resistance 2000 laps, level 4-5 Gloss 89％ elasticity Vertical: 11% Horizontal: 8.5% breathability priority Ultra-thin transparency excellent Appearance It has a better luster than real silk and is soft and delicate. life Long expected service life and excellent anti-aging properties Shrinkage 4.2% 3.5% in the latitudinal direction

[0184] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a cellulose fiber imitation silk fabric, characterized in that, Includes the following steps; Step 1: Prepare the yarn; Warp yarn: Made of Lyocell filament, twisted by a filament doubling machine, S-twist; Weft yarn: 80-90% Lyocell fiber and 10-20% silk are blended and spun by Siro compact spinning method; Step Two: Warping; The warp yarns are wound into a warp beam using slit warping, and the warping speed is controlled at 200-300m / min. Tension plates and pressure weights are used to control the warping tension. Step 3: Threading the reed; By manually threading the reed, the yarns on the warp beam are passed one by one through the stop warp, heddles and reed, with a number of yarns ranging from 21,400 to 35,000. Step 4: Weaving; The warp beams, stop warp pieces, and heald frames that have been threaded through the reed are placed on an air-jet loom for weaving. The fabric is woven according to the healdrying structure and weft density process parameters to produce a silk-like fabric. The width of the woven fabric is 270-280cm. Step 5: Dyeing and Finishing; The woven fabric is dyed and finished. The dyeing and finishing process includes singeing, bleaching, pre-setting, dyeing, sizing, calendering and pre-shrinking. After dyeing and finishing, the finished fabric width is 250-255cm. In step one, the specific steps for S-twist are as follows: Y1: Filament is doubled using a filament doubling machine; Control the filament feeding speed at 450-500 m / min; Set the machine's twist to 400-450 T / M; Set the twist segment to 6-8 segments, with each segment increasing the twist by 8-10 T / M; Y2: S-twisting is performed using an S-twisting machine; The twist range is set to 350-400 T / M; The control linear velocity is 80-100 m / min; Y3: Final twisting is performed using a final twisting machine; The twist range is set to 750-850 T / M; The linear velocity is controlled at 40-50 m / min.

2. The method for preparing a cellulose fiber imitation silk fabric according to claim 1, characterized in that, In step one, the parameters for Siro compact spinning are set as follows: Yarn twist: Set at 800-850 T / M; Yarn stretch: Set to 1.2-1.5 times; Spinning temperature and humidity: Control the temperature and humidity between 20-25℃ and the relative humidity between 50-60%.

3. The method for preparing a cellulose fiber imitation silk fabric according to claim 1, characterized in that, In step two, the specific steps for controlling the warping tension using tension plates and pressure weights are as follows: N1: Tension gauge and tension setting; Install the tension gauge on the warping machine, set the tension range of the tension gauge to 3 to 5 N, control the running speed of the warping machine to be between 200 and 300 m / min, and make fine adjustments according to the actual situation; N2: Pressure bar arrangement and adjustment; At the rear of the warping machine, 3-5 pressure weights are set and adjusted according to design requirements. Sensors are introduced to automatically adjust the position and weight of the pressure weights according to changes in warp yarn tightness. The initial pressure weight is set to 3-5g and adjusted proportionally according to the diameter of the warp beam.

4. The method for preparing a cellulose fiber imitation silk fabric according to claim 1, characterized in that, In step three, the specific method for threading the reed is as follows: S1. Using an alternating threading method, the yarn is passed through the stop warp, heddle, and reed one by one; S2. Select a yarn group to start threading the reed. When threading the reed, start from the bottom of the fabric, below the loom, and thread the yarn under the heddle wire and twist it from one side to the other to form a small loop. S3. Save the position of the first small loop. Next, select another yarn group, pass the yarn through the small loop in the previous yarn group, and then form a new small loop. S4. Repeat steps S2 and S3, and thread the yarn through the small loops in all yarn groups one by one according to the predetermined reed threading order to form a large loop; S5. Finally, pass the last yarn group through the reed and out, securing the yarn to the reed.

5. The method for preparing a cellulose fiber imitation silk fabric according to claim 1, characterized in that, In step four, the heald frame is equipped with 6-10 heald frames, and each heald frame is equipped with 4200-4500 heald yarns. The air-jet loom is equipped with 12-20 sets of auxiliary nozzles, with 2 auxiliary nozzles in each set, and the auxiliary nozzles are arranged at equal intervals.

6. The method for preparing a cellulose fiber imitation silk fabric according to claim 5, characterized in that, In step four, the process parameters for the air-jet loom are set as follows: back beam height 6-8, depth 8-10; warp stop height 3-5, depth 5-7; shedding time 290-300°, shedding angle 30-32°; weft insertion time 75-80°, weft arrival time 225-230°.

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