Preparation method of wool cellulose blended fabric

Abstract

The invention relates to a preparation method of a wool cellulose blended fabric. The preparation method comprises the following steps: weaving wool cellulose blended yarns to obtain a blank fabric; the blank fabric is sequentially subjected to dyeing, sizing and preshrinking treatment, and the wool cellulose blended fabric is obtained; the weft yarn density in the weaving process is 22.6 to 26.6 cm / 100 lines; according to the preparation method, the problems of skewing and skewing in the production process of the wool cellulose blended fabric are obviously improved, the skewing rate is preferably as low as 5.0% or below, the skewing rate is preferably as low as 3.0% or below, meanwhile, the shrinkage rate is reduced, the shrinkage rate is preferably as low as 5.0% or below, and the high-quality wool cellulose blended fabric is obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of textile fabrics, and particularly to a preparation method of a wool-cellulose blended fabric. Background Art

[0002] Wool fibers belong to natural fibers and have characteristics such as good elasticity, plump handfeel, good hygroscopicity, good warmth retention, soft luster, and felting property. However, in the washing and wearing processes of woolen products with a loose structure made of pure wool, shrinkage and pilling are likely to occur, easily causing deformation of knitted wool products, unstable dimensions, and a prickling sensation when the skin comes into contact with pure wool products. Cellulose fibers (such as cotton, viscose, modal, and tencel, etc.) have always played a crucial role in the development process of textiles due to their rich resources, renewable nature, and strong availability. They have good hygroscopicity, air permeability, and softness, but relatively insufficient strength and elasticity. By blending, the advantages of the two fibers can be combined to make up for their respective deficiencies, thereby developing textiles with better performance to meet the increasingly diverse needs of consumers for textiles.

[0003] However, quality problems such as shrinkage, skewing, and weft skewing of wool-cellulose blended fabrics have always been important research topics in the textile industry. The shrinkage problem mainly stems from the felting property of wool fibers and the hygroscopicity of cellulose fibers (such as cotton, viscose, etc.). These two characteristics interact during processing and use, resulting in unstable fabric dimensions. Skewing and weft skewing are common problems in knitted fabrics, especially in wool-cellulose blended fabrics. After the two are blended, the physical property differences of the fibers make the fabric more prone to skewing and weft skewing during processing. These problems not only affect the appearance of the fabric but may also cause deformation and unstable dimensions of ready-to-wear garments, especially more obvious after washing.

[0004] For example, CN104746196A discloses a two-component blended yarn of wool and tencel, its preparation method, and its application in home textile fabrics. By blending tencel and wool into yarn, the shrinkage and pilling phenomena during product use are improved, and the strength of wool fabrics is increased. However, its shrinkage rate is still as high as -3%, and there is still much room for improvement. Moreover, it does not consider the problems of weft skewing and skewing, and the shape of the obtained fabric is still unstable.

[0005] CN115652512A discloses a processing technology of a wool-viscose blended fabric and a microwave setting twisting device for its processing. There is still room for improvement in aspects such as the complexity of its equipment structure, operating efficiency, setting twisting uniformity, process cost, and fiber adaptability. Although it can reduce the internal stress of fibers to a certain extent, it does not clearly solve the problems of shrinkage, skewing, and weft skewing.

[0006] Therefore, how to develop a preparation method that can solve the problems of skewing and weft skewing during the production of wool-cellulose blended fabrics and the shrinkage problem after washing is an urgent problem to be solved in the current field. Summary of the Invention

[0007] To solve the above technical problems, the present invention provides a preparation method for a wool-cellulose blended fabric, which significantly improves the morphological stability of the wool-cellulose blended fabric, including improving problems such as skewing and weft skewing generated during the production process, and greatly reducing the shrinkage rate after washing, meeting the mass production standard.

[0008] To achieve this purpose, the present invention adopts the following technical solutions:

[0009] The present invention provides a preparation method for a wool-cellulose blended fabric, and the preparation method includes the following steps:

[0010] The wool-cellulose blended yarn is knitted to obtain a blank fabric; the blank fabric is successively subjected to dyeing, shaping, and preshrinking treatments to obtain the wool-cellulose blended fabric;

[0011] During the knitting process, the weft density is 22.6 - 26.6 cm / 100 courses.

[0012] Among them, during the knitting process, the weft density is 22.6 - 26.6 cm / 100 courses. "cm / 100 courses means the width of 100 weft yarns", for example, it can be 22.6 cm / 100 courses, 23.6 cm / 100 courses, 24.6 cm / 100 courses, 25.6 cm / 100 courses, or 26.6 cm / 100 courses, etc.

[0013] The preparation method of the present invention uses a wool-cellulose blended yarn and successively performs knitting, dyeing, shaping, and preshrinking treatments, and selects the weft density during the knitting process to be 22.6 - 26.6 cm / 100 courses. The combination of each process synergistically makes the morphology of the obtained wool-cellulose blended fabric more stable. Especially after shaping, preshrinking treatment is further carried out. Combining with the control of the weft density in the previous knitting process, first making its structure relatively tight, and then fully releasing the internal stress generated during the dyeing and shaping processes, thereby improving the dimensional stability, significantly improving the shrinkage phenomenon, and effectively solving the problems of skewing and weft skewing of the wool-cellulose blended fabric during the production process. Its skewing rate and weft skewing rate are effectively reduced; it can successfully prepare a wool-cellulose blended fabric with better overall performance and quality, providing high-grade fabrics for the textile field.

[0014] Preferably, the wool-cellulose blended yarn includes 15wt% - 40wt% wool fibers and 60wt% - 85wt% cellulose fibers.

[0015] Among them, the wool fiber is 15wt% - 40wt%, for example, it can be 15wt%, 20wt%, 25wt%, 30wt%, 35wt% or 40wt%, etc.; the cellulose fiber is 60wt% - 85wt%, for example, it can be 60wt%, 65wt%, 70wt%, 75wt%, 80wt% or 85wt%, etc.

[0016] Preferably, the cellulose fiber includes any one or a combination of at least two of cotton fiber, hemp fiber, bamboo fiber, viscose fiber, tencel fiber or modal fiber. Among them, typical but non - restrictive combinations include the combination of cotton fiber and hemp fiber, the combination of cotton fiber and tencel fiber, or the combination of bamboo fiber and tencel fiber, etc.

[0017] Preferably, the wool - cellulose blended yarn is 32N single - yarn to 60N single - yarn, for example, it can be 32N single - yarn, 35N single - yarn, 38N single - yarn, 40N single - yarn, 45N single - yarn, 50N single - yarn, 55N single - yarn or 60N single - yarn, etc.

[0018] Preferably, the knitting is carried out by a circular knitting machine.

[0019] Preferably, during the knitting process, the tension of the wool - cellulose blended yarn is 2.0 - 3.0 cN, for example, it can be 2.0 cN, 2.1 cN, 2.2 cN, 2.3 cN, 2.4 cN, 2.5 cN, 2.6 cN, 2.7 cN, 2.8 cN, 2.9 cN or 3.0 cN.

[0020] Preferably, the dyeing includes the blank fabric being heated, kept warm, heated again and kept warm again in the dyeing solution in sequence.

[0021] Preferably, the end - point temperature of the first heating is 30 - 50 °C, for example, it can be 30 °C, 35 °C, 40 °C, 45 °C or 50 °C, etc.

[0022] Preferably, the heating rate of the first heating is 0.75 - 1.2 °C / min, for example, it can be 0.75 °C / min, 0.85 °C / min, 1.0 °C / min, 1.15 °C / min or 1.2 °C / min, etc.

[0023] Preferably, the time of the first heat preservation is 15 - 30 min, for example, it can be 15 min, 18 min, 20 min, 22 min, 25 min, 28 min or 30 min, etc.

[0024] Preferably, the end - point temperature of the second heating is 55 - 65 °C, for example, it can be 55 °C, 58 °C, 60 °C, 62 °C or 65 °C, etc.

[0025] Preferably, the heating rate of the second heating is 0.75 to 1.2 °C / min, for example, it can be 0.75 °C / min, 0.85 °C / min, 1.0 °C / min, 1.15 °C / min or 1.2 °C / min, etc.

[0026] Preferably, the time of the second heat preservation is 50 to 80 min, for example, it can be 50 min, 60 min, 70 min or 80 min, etc.

[0027] Preferably, the mass ratio of the blank fabric to the dyeing solution during dyeing is 1:(12 to 16), for example, it can be 1:12, 1:13, 1:14, 1:15 or 1:16, etc.

[0028] Preferably, the dyeing solution includes reactive dyes, softeners, leveling agents and dispersants.

[0029] Preferably, the reactive dyes include red reactive dyes, yellow reactive dyes and blue reactive dyes.

[0030] Preferably, the dyeing solution includes 0.02 to 0.05 wt% red reactive dye, 0.02 to 0.05 wt% yellow reactive dye, 0.05 to 0.10 wt% blue reactive dye, 1 to 3 g / L softener, 1 to 3 wt% leveling agent, 0.2 to 0.8 g / L dispersant, 8 to 12 g / L anhydrous sodium sulfate, 0.5 to 1.5 g / L sodium bicarbonate and 3 to 8 g / L sodium carbonate.

[0031] Among them, 0.02 - 0.05 wt% of red reactive dye, for example, can be 0.02 wt%, 0.03 wt%, 0.04 wt% or 0.05 wt%, etc.; 0.02 - 0.05 wt% of yellow reactive dye, for example, can be 0.02 wt%, 0.03 wt%, 0.04 wt% or 0.05 wt%, etc.; 0.05 - 0.10 wt% of blue reactive dye, for example, can be 0.05 wt%, 0.06 wt%, 0.07 wt%, 0.08 wt%, 0.09 wt% or 0.10 wt%, etc.; 1 - 3 g / L of softener, for example, can be 1 g / L, 1.5 g / L, 2 g / L, 2.5 g / L or 3 g / L, etc.; 1 - 3 wt% of leveling agent, for example, can be 1 wt%, 1.5 wt%, 2 wt%, 2.5 wt% or 3 wt%, etc.; 0.2 - 0.8 g / L of dispersant, for example, can be 0.2 g / L, 0.3 g / L, 0.4 g / L, 0.5 g / L, 0.6 g / L, 0.7 g / L or 0.8 g / L, etc.; 8 - 12 g / L of anhydrous sodium sulfate, for example, can be 8 g / L, 9 g / L, 10 g / L, 11 g / L or 12 g / L, etc.; 0.5 - 1.5 g / L of sodium bicarbonate, for example, can be 0.5 g / L, 0.8 g / L, 1.0 g / L, 1.2 g / L or 1.5 g / L, etc.; 3 - 8 g / L of sodium carbonate, for example, can be 3 g / L, 4 g / L, 5 g / L, 6 g / L, 7 g / L or 8 g / L, etc.

[0032] Preferably, the softener includes Sinsoft CF - 900.

[0033] Preferably, the leveling agent includes Sinlever CE - 30.

[0034] Preferably, the dispersant includes Sinquest CA - 170.

[0035] Preferably, the raw fabric is pretreated with degreasing before dyeing.

[0036] The present invention further preferably pretreats the raw fabric with degreasing before dyeing, aiming to remove the residual grease and impurities on the raw fabric, reduce the friction between fibers, and make it more stable in the subsequent processing; if the raw fabric is directly dyed without degreasing treatment, the residual grease will increase the friction between fibers, thus causing skewing or weft skewing during dyeing or subsequent shaping.

[0037] Preferably, the degreasing treatment includes the raw fabric being subjected to first heating and insulation, first cooling and insulation, and second cooling and insulation in a degreasing agent.

[0038] Preferably, the degreasing agent comprises Imacol X-JET lip, TISSOCYL RC9 and anhydrous sodium sulfate.

[0039] Preferably, the degreasing agent comprises 1-3 g / L of Imacol X-JET lip, 0.5-2 g / L of TISSOCYL RC9 and 3 wt%-6 wt% of anhydrous sodium sulfate.

[0040] Among them, 1-3 g / L of Imacol X-JET lip can be, for example, 1 g / L, 1.5 g / L, 2 g / L, 2.5 g / L or 3 g / L, etc.; 0.5-2 g / L of TISSOCYL RC9 can be, for example, 0.5 g / L, 1 g / L, 1.5 g / L or 2 g / L; 3 wt%-6 wt% of anhydrous sodium sulfate can be, for example, 3 wt%, 4 wt%, 5 wt% or 6 wt%, etc.

[0041] Preferably, the end temperature of the first heating and heat preservation is 80-100 °C, which can be, for example, 80 °C, 85 °C, 90 °C, 95 °C or 100 °C, etc.

[0042] Preferably, the heat preservation time of the first heating and heat preservation is 15-25 min, which can be, for example, 15 min, 18 min, 20 min, 22 min or 25 min, etc.

[0043] Preferably, the end temperature of the first cooling and heat preservation is 50-70 °C, which can be, for example, 50 °C, 55 °C, 60 °C, 65 °C or 70 °C, etc.

[0044] Preferably, the heat preservation time of the first cooling and heat preservation is 5-15 min, which can be, for example, 5 min, 8 min, 10 min, 12 min or 15 min, etc.

[0045] Preferably, the end temperature of the second cooling and heat preservation is 25-45 °C, which can be, for example, 25 °C, 30 °C, 35 °C, 40 °C or 45 °C, etc.

[0046] Preferably, the heat preservation time of the second cooling and heat preservation is 5-15 min, which can be, for example, 5 min, 8 min, 10 min, 12 min or 15 min, etc.

[0047] Preferably, the setting temperature is 130-160 °C, which can be, for example, 130 °C, 140 °C, 150 °C or 160 °C, etc.

[0048] Preferably, the cloth outlet tension of the calender during setting is 12-16 N, which can be, for example, 12 N, 13 N, 14 N, 15 N or 16 N, etc.

[0049] The present invention further preferably sets the fabric take-up tension of the calender during shaping to be 12 - 16 N, which is beneficial to ensuring its dimensional stability and effectively reducing weft skew, twist skew, and shrinkage. If the fabric take-up tension of the calender during shaping is too low, it will cause the blank fabric to be too loose when entering the oven, easily resulting in weft skew and twist skew, and insufficient tension will lead to an increase in the shrinkage rate. If the fabric take-up tension of the calender during shaping is too high, it will cause the blank fabric to be over-stretched when entering the oven, increasing the risk of weft skew and twist skew, and excessive tension will lead to an increase in the shrinkage rate after shaping.

[0050] Preferably, the fabric take-up tension of the oven during shaping is 20 - 25 N, for example, it can be 20 N, 21 N, 22 N, 23 N, 24 N, or 25 N, etc.

[0051] Preferably, the fabric take-up speed of the oven during shaping is 12 - 18 m / min, for example, it can be 12 m / min, 14 m / min, 16 m / min, or 18 m / min, etc.

[0052] Preferably, the main overfeed ratio during shaping is 5% - 10%, for example, it can be 5%, 6%, 7%, 8%, 9%, or 10%, etc.

[0053] Preferably, during the shaping process, a stabilizer is also added to the blank fabric.

[0054] Preferably, the stabilizer includes resin stabilizers.

[0055] Preferably, the resin stabilizer includes GL-54 (Kunshan Mingjia Auxiliary Co., Ltd.).

[0056] Preferably, the added mass concentration of the resin stabilizer is 8 - 12 wt%, for example, it can be 8 wt%, 9 wt%, 10 wt%, 11 wt%, or 12 wt%, etc.

[0057] Preferably, during the shaping process, a composite metal salt resin catalyst is also added to the blank fabric.

[0058] Preferably, the composite metal salt resin catalyst includes TF (Kunshan Mingjia Auxiliary Co., Ltd.).

[0059] Preferably, the added mass concentration of the composite metal salt resin catalyst is 2.5 - 3.5 wt%, for example, it can be 2.5 wt%, 2.8 wt%, 3.0 wt%, 3.2 wt%, or 3.5 wt%, etc.

[0060] Preferably, the mass ratio of the resin stabilizer to the composite metal salt resin stabilizer is (2.5 - 4.5):1. For example, it can be 2.5:1, 2.8:1, 3:1, 3.2:1, 3.5:1, 3.8:1, 4:1, 4.2:1 or 4.5:1, etc.

[0061] The present invention further preferably adds a resin stabilizer and a composite metal salt resin catalyst to the blank fabric during the shaping process, and further preferably the mass ratio of the resin stabilizer to the composite metal salt resin catalyst is (2.5 - 4.5):1. The two work synergistically to further improve the shape stability of the obtained fabric. If the mass ratio of the resin stabilizer to the composite metal salt resin catalyst is too low, the function of stabilizing the shape cannot be fully exerted, resulting in still relatively high skewing and weft slope. If the mass ratio of the resin stabilizer to the composite metal salt resin catalyst is too high, the resin stabilizer cannot fully play its role, and the effect cannot be significantly improved. Instead, it causes waste of reagents and increases production costs.

[0062] Preferably, the preshrinking treatment is carried out in a flat-width woolen blanket preshrinking machine.

[0063] Preferably, the temperature of the preshrinking treatment is 100 - 120°C. For example, it can be 100°C, 105°C, 110°C, 115°C or 120°C, etc.

[0064] Preferably, during the preshrinking treatment, the speed of the flat-width woolen blanket preshrinking machine is 12 - 18 m / min. For example, it can be 12 m / min, 14 m / min, 16 m / min or 18 m / min, etc.

[0065] The present invention further preferably has the speed of the flat-width woolen blanket preshrinking machine being 12 - 18 m / min, ensuring that the shaped blank fabric is evenly heated and has uniform tension, inhibiting the generation of skewing and weft skewing, and significantly reducing the shrinkage rate. If the speed of the flat-width woolen blanket preshrinking machine is too fast, it will cause insufficient heating time for the shaped blank fabric during the preshrinking process, the fibers cannot be fully preshrunk, and at the same time, the internal stress cannot be completely released, resulting in an increase in the shrinkage rate. Moreover, too fast a speed will cause the shaped blank fabric to be unevenly heated in the woolen blanket preshrinking area, increasing the risk of skewing and weft skewing. If the speed of the flat-width woolen blanket preshrinking machine is too slow, it will cause excessive shrinkage of the fibers, instead increasing the shrinkage rate. Insufficient and uneven tension will both cause weft skewing and skewing to occur.

[0066] As a further preferred technical solution of the present invention, the preparation method includes the following steps:

[0067] The wool-cellulose blended yarn is warp knitted to obtain a blank fabric under the conditions that the tension is 2.0 - 3.0 cN and the weft density is 22.6 - 26.6 cm / 100 courses; the blank fabric is first degreased in a degreasing agent, and the degreasing treatment includes: first heating and keeping warm, heating to 80 - 100 °C and keeping warm for 15 - 25 min, then cooling and keeping warm for the first time, cooling to 50 - 70 °C and keeping warm for 5 - 15 min, and then cooling and keeping warm for the second time, cooling to 25 - 45 °C and keeping warm for 5 - 15 min; subsequently, the degreased blank fabric is first heated to 30 - 50 °C at a heating rate of 0.75 - 1.2 °C / min in a dyeing solution and then kept warm for 15 - 30 min, and then heated to 55 - 65 °C at a heating rate of 0.75 - 1.2 °C / min and then kept warm for 50 - 80 min for dyeing; then it is shaped under the conditions of 130 - 160 °C, the cloth output tension of the calender is 12 - 16 N, the cloth output tension of the oven is 20 - 25 N, the cloth output speed of the oven is 12 - 18 m / min and the main overfeed ratio is 5% - 10%; and during the shaping process, a resin stabilizer and a composite metal salt resin catalyst with a mass ratio of (2.5 - 4.5):1 are added to the blank fabric; finally, pre-shrinking treatment is carried out at 100 - 120 °C by a flat felt pre-shrinking machine, and the vehicle speed is 12 - 18 m / min to obtain the wool-cellulose blended fabric.

[0068] Compared with the prior art, the present invention has at least the following beneficial effects:

[0069] The preparation method of the wool-cellulose blended fabric provided by the present invention, through sequentially carrying out knitting, dyeing, shaping and pre-shrinking treatments, the various processes interact with each other, and at the same time, process parameters such as the weft density, the cloth output tension of the calender and the vehicle speed of the flat felt pre-shrinking machine are regulated, and the degreasing treatment process is added, and a resin stabilizer and a composite metal salt resin catalyst with a specific ratio are added, etc., and the various parameters act together to make the obtained wool-cellulose blended fabric have a stable shape, and the phenomena of skewing and weft skewing during the production process are greatly reduced, the skewing rate is preferably as low as below 5.0%, the weft skewing rate is preferably as low as below 3.0%, and at the same time, the shrinkage situation after washing is also significantly improved, the warp shrinkage rate is preferably as low as below 4.0%, and the weft shrinkage rate is preferably as low as below 5.0%. Specific Embodiments

[0070] For the convenience of understanding the present invention, the following examples are listed. Those skilled in the art should understand that the examples are only for helping to understand the present invention and should not be regarded as specific limitations on the present invention.

[0071] The wool-cellulose blended yarn used in the following examples and comparative examples has a composition of 40 wt% wool fiber and 60 wt% tencel fiber, and 55 N single yarn.

[0072] The composition and manufacturer of the reagents used in the following examples and comparative examples are shown in Table 1;

[0073] Table 1

[0074]

[0075]

[0076] I. Examples

[0077] Example 1

[0078] This example provides a method for preparing a wool-cellulose blended fabric. The preparation method includes the following steps:

[0079] The wool-cellulose blended yarn is knitted under the conditions of a tension of 2.5 cN and a weft density of 25.6 cm / 100 courses to obtain a blank fabric; the blank fabric is first degreased in a degreasing agent. The degreasing treatment includes: first heating and maintaining at a constant temperature, heating to 90 °C and maintaining for 20 min, then cooling and maintaining at a constant temperature, cooling to 60 °C and maintaining for 10 min, and then cooling and maintaining at a constant temperature again, cooling to 40 °C and maintaining for 10 min; subsequently, the degreased blank fabric is first heated in a dyeing solution at a heating rate of 1.0 °C / min to 40 °C and then maintained at a constant temperature for 20 min, and then heated at a heating rate of 1.0 °C / min to 60 °C and then maintained at a constant temperature for 60 min for dyeing; then it is shaped under the conditions of 150 °C, a cloth outlet tension of 15 N for the calender, a cloth outlet tension of 21 N for the oven, an oven cloth outlet speed of 15 m / min, and a main overfeed ratio of 8%; and during the shaping process, GL-54 (10 wt%) and TF (3 wt%) with a mass ratio of 4:1 are added to the blank fabric; finally, it is pre-shrunk at 110 °C using a flat woolen blanket pre-shrinking machine at a vehicle speed of 15 m / min to obtain the wool-cellulose blended fabric.

[0080] Example 2

[0081] This example provides a method for preparing a wool-cellulose blended fabric. The preparation method includes the following steps:

[0082] The wool cellulose blended yarn is warp knitted to obtain a blank fabric under the conditions of a tension of 2.0 cN and a weft density of 22.6 cm / 100 courses; the blank fabric is first degreased in a degreasing agent, and the degreasing treatment includes: first heating and maintaining the temperature, heating to 80 °C and maintaining for 25 min, then cooling and maintaining the temperature, cooling to 50 °C and maintaining for 15 min, and then cooling and maintaining the temperature again, cooling to 30 °C and maintaining for 5 min; subsequently, the degreased blank fabric is first heated in a dyeing solution at a heating rate of 0.75 °C / min to 30 °C and then maintained for 30 min, and then heated at a heating rate of 1.0 °C / min to 55 °C and then maintained for 50 min for dyeing; then it is shaped under the conditions of 130 °C, a fabric delivery tension of 12 N for the calender, a fabric delivery tension of 20 N for the oven, an oven fabric delivery speed of 12 m / min, and a main overfeed ratio of 10%; and during the shaping process, GL-54 (8 wt%) and TF (2.5 wt%) with a mass ratio of 2.5:1 are added to the blank fabric; finally, it is pre-shrunk at 100 °C using a flat woolen blanket pre-shrinking machine with a vehicle speed of 12 m / min to obtain the wool cellulose blended fabric.

[0083] Example 3

[0084] This example provides a method for preparing a wool cellulose blended fabric, and the preparation method includes the following steps:

[0085] The wool cellulose blended yarn is warp knitted to obtain a blank fabric under the conditions of a tension of 3.0 cN and a weft density of 26.6 cm / 100 courses; the blank fabric is first degreased in a degreasing agent, and the degreasing treatment includes: first heating and maintaining the temperature, heating to 100 °C and maintaining for 15 min, then cooling and maintaining the temperature, cooling to 70 °C and maintaining for 5 min, and then cooling and maintaining the temperature again, cooling to 45 °C and maintaining for 15 min; subsequently, the degreased blank fabric is first heated in a dyeing solution at a heating rate of 1.0 °C / min to 50 °C and then maintained for 15 min, and then heated at a heating rate of 1.2 °C / min to 65 °C and then maintained for 80 min for dyeing; then it is shaped under the conditions of 160 °C, a fabric delivery tension of 16 N for the calender, a fabric delivery tension of 25 N for the oven, an oven fabric delivery speed of 18 m / min, and a main overfeed ratio of 5%; and during the shaping process, GL-54 (12 wt%) and TF (3.5 wt%) with a mass ratio of 4.5:1 are added to the blank fabric; finally, it is pre-shrunk at 120 °C using a flat woolen blanket pre-shrinking machine with a vehicle speed of 18 m / min to obtain the wool cellulose blended fabric.

[0086] Example 4

[0087] This embodiment provides a method for preparing a wool-cellulose blended fabric. Except that the blank fabric is not degreased but directly dyed, the rest of the preparation method is the same as that of Embodiment 1.

[0088] Embodiment 5

[0089] This embodiment provides a method for preparing a wool-cellulose blended fabric. Except that the fabric output tension of the calendar mangle during setting is 10 N, the rest of the preparation method is the same as that of Embodiment 1.

[0090] Embodiment 6

[0091] This embodiment provides a method for preparing a wool-cellulose blended fabric. Except that the fabric output tension of the calendar mangle during setting is 20 N, the rest of the preparation method is the same as that of Embodiment 1.

[0092] Embodiment 7

[0093] This embodiment provides a method for preparing a wool-cellulose blended fabric. Except that the speed of the open-width felt pre-shrinking machine during pre-shrinking treatment is 10 m / min, the rest of the preparation method is the same as that of Embodiment 1.

[0094] Embodiment 8

[0095] This embodiment provides a method for preparing a wool-cellulose blended fabric. Except that the speed of the open-width felt pre-shrinking machine during pre-shrinking treatment is 20 m / min, the rest of the preparation method is the same as that of Embodiment 1.

[0096] Embodiment 9

[0097] This embodiment provides a method for preparing a wool-cellulose blended fabric. Except that the mass ratio of GL-54 (10 wt%) and TF (3 wt%) added to the blank fabric during the setting process is 2:1, the rest of the preparation method is the same as that of Embodiment 1.

[0098] Embodiment 10

[0099] This embodiment provides a method for preparing a wool-cellulose blended fabric. Except that the mass ratio of GL-54 (10 wt%) and TF (3 wt%) added to the blank fabric during the setting process is 5:1, the rest of the preparation method is the same as that of Embodiment 1.

[0100] II. Comparative Examples

[0101] Comparative Example 1

[0102] This comparative example provides a method for preparing a wool-cellulose blended fabric. Except that no pre-shrinking treatment is performed after setting, the rest of the preparation method is the same as that of Embodiment 1.

[0103] Comparative Example 2

[0104] This comparative example provides a method for preparing a wool-cellulose blended fabric. Except that the weft density is 22.0 cm / 100 picks during the weaving process, the rest are the same as those in Example 1.

[0105] Comparative Example 3

[0106] This comparative example provides a method for preparing a wool-cellulose blended fabric. Except that the weft density is 27.0 cm / 100 picks during the weaving process, the rest are the same as those in Example 1.

[0107] III. Tests and Results

[0108] The twist rate (ISO 16322-2 standard), weft slope (ASTM D3882 standard), and shrinkage rate (including warp shrinkage rate and weft shrinkage rate, ISO 633 standard) of the wool-cellulose blended fabrics obtained by the preparation methods provided in the above examples and comparative examples after washing were tested, and the results are shown in Table 2;

[0109] Table 2

[0110] Project Twist slope / % Weft slope / % Longitudinal shrinkage rate / % Latitudinal shrinkage rate / % Example 1 3.8 2.5 3.5 3.9 Example 2 4.2 2.6 3.8 4.2 Example 3 4.0 2.8 4.0 5.0 Example 4 7.2 4.3 5.1 8.2 Example 5 6.8 5.0 5.6 7.9 Example 6 7.5 5.8 5.5 8.0 Example 7 6.9 4.8 5.8 7.6 Example 8 7.1 4.5 6.2 7.9 Example 9 7.8 5.2 5.0 8.8 Example 10 7.5 4.9 5.3 8.4 Comparative Example 1 8.9 7.8 9.5 9.8 Comparative Example 2 8.5 6.5 7.9 9.3 Comparative Example 3 8.6 7.9 8.5 9.6

[0111] It can be seen from the data in Table 2 that:

[0112] (1) Considering Examples 1 to 3 comprehensively, it can be seen that for the method for preparing the wool-cellulose blended fabric provided by the present invention, by optimizing the process parameters of weaving, dyeing, shaping, and preshrinking, and combining each process, the twist, weft skew, and shrinkage problems of the wool-cellulose blended fabric during the preparation process are significantly improved. The twist rate is as low as below 5.0%, the weft slope is as low as below 3.0%, the warp shrinkage rate is as low as below 4.0%, and the weft shrinkage rate is as low as below 5.0%; the overall performance and quality of the obtained wool-cellulose blended fabric are significantly improved.

[0113] (2) Considering Example 1 and Example 4 comprehensively, it can be seen that: in Example 4, since the blank fabric was not degreased but directly dyed, the twist rate of the obtained wool fiber blended fabric increased to 7.2%, the weft slope increased to 4.3%, the warp shrinkage rate increased to 5.1%, and the weft shrinkage rate increased to 8.2%; this shows that the present invention further preferably degreases the blank fabric before dyeing, further improving the overall performance and appearance quality of the obtained wool-cellulose blended fabric.

[0114] (3) From the comprehensive comparison of Example 1 with Example 5 and Example 6, it can be seen that whether the fabric output tension of the calender during setting in Example 5 is too low or the fabric output tension of the calender during setting in Example 6 is too high, both result in an increase in the twist slope, weft slope, and shrinkage rate of the obtained wool fiber blended fabric. Thus, it can be seen that the present invention further preferably sets the fabric output tension of the calender during setting to be 12 - 16 N, which is beneficial to ensuring its morphological stability.

[0115] (4) From the comprehensive comparison of Example 1 with Example 7 and Example 8, it can be seen that when the speed of the open-width felt preshrinker in Example 7 is too low or the speed of the open-width felt preshrinker in Example 8 is too high, both result in unsatisfactory heat and tension during the preshrinking process, leading to an increase in the twist slope, weft slope, and shrinkage rate of the obtained wool fiber blended fabric. Thus, it is shown that the present invention further preferably sets the speed of the open-width felt preshrinker to be 12 - 18 m / min, further improving the performance and quality of the obtained wool cellulose blended fabric.

[0116] (5) From the comprehensive comparison of Example 1 with Example 9 and Example 10, it can be seen that in Example 9, the mass ratio of GL-54 (10 wt%) and TF (3 wt%) added to the blank fabric during setting is too low, resulting in an increased risk of twist and weft skew, and an increased shrinkage rate after washing. In Example 10, the mass ratio of GL-54 (10 wt%) and TF (3 wt%) added to the blank fabric during setting is too high, but it does not improve the twist and weft skew problems, and the shrinkage rate is not significantly reduced. Thus, it is shown that the present invention further preferably sets the mass ratio of the resin stabilizer and the composite metal salt resin catalyst added to the blank fabric during setting to be (2.5 - 4.5):1, further ensuring the morphological stability of the obtained wool cellulose blended fabric.

[0117] (6) From the comprehensive comparison of Example 1 with Comparative Example 1 to Comparative Example 3, it can be seen that in Comparative Example 1, no preshrinking treatment was performed after setting in the preparation method, resulting in the ineffective release of the internal stress generated during the dyeing and setting process of the fabric. Moreover, the arrangement of the fibers and yarns in the fabric without preshrinking treatment is relatively loose, thus increasing the risk of twist and weft skew. At the same time, during the washing process, further shrinkage occurs due to fiber swelling, resulting in a significant increase in the shrinkage rate. In Comparative Example 2 or Comparative Example 3, when the weft density during weaving is too low or too high, both result in extremely unstable morphology of the obtained wool fiber blended fabric, an increase in the twist slope and weft slope, and an increase in the warp shrinkage rate and weft shrinkage rate. Thus, it is shown that the preparation method of the present invention adds a preshrinking treatment step after setting and controls the weft density during the weaving process to be 22.6 - 26.6 cm / 100 picks. The two work together to significantly improve the morphological stability of the obtained wool cellulose blended fabric and improve the twist, weft skew, and shrinkage problems of the obtained wool cellulose blended fabric.

[0118] The applicant declares that the above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by any person skilled in the art within the technical scope disclosed by the present invention fall within the protection scope and the disclosure scope of the present invention.

Claims

1. A method for preparing a wool-cellulose blended fabric, characterized in that: The preparation method comprises the following steps: The wool-cellulose blended yarn is woven to obtain a rough fabric; the rough fabric is sequentially dyed, shaped and pre-shrunk to obtain the wool-cellulose blended fabric; During the weaving process, the weft yarn density is 22.6-26.6 cm / 100 yarns.

2. The preparation method according to claim 1, characterized in that: The wool-cellulose blended yarn comprises 15wt% to 40wt% of wool fibers and 60wt% to 85wt% of cellulose fibers; Preferably, the cellulose fiber comprises any one of cotton fiber, hemp fiber, bamboo fiber, viscose fiber, tencel fiber or modal fiber, or a combination of at least two thereof; Preferably, the wool-cellulose blended yarn is 32N single yarn to 60N single yarn.

3. The preparation method according to claim 1 or 2, characterized in that: During the weaving process, the tension of the wool-cellulose blended yarn is 2.0-3.0 cN.

4. The preparation method according to any one of claims 1 to 3, characterized in that: The dyeing comprises the following steps: the rough fabric is subjected to first heating, first heat preservation, second heating and second heat preservation in the dyeing liquid in sequence; Preferably, the terminal temperature of the first heating is 30-50°C; Preferably, the heating rate of the first heating is 0.75-1.2°C / min; Preferably, the first insulation time is 15 to 30 minutes; Preferably, the end point temperature of the second heating is 55-65°C; Preferably, the heating rate of the second heating is 0.75-1.2°C / min; Preferably, the second insulation time is 50 to 80 minutes.

5. The preparation method according to any one of claims 1 to 4, characterized in that: During dyeing, the mass ratio of the rough fabric to the dyeing liquid is 1:(12-16); Preferably, the dyeing liquid comprises a reactive dye, a softener, a leveling agent and a dispersant.

6. The preparation method according to any one of claims 1 to 5, characterized in that: Before dyeing, the rough fabric is first degreased; Preferably, the degreasing treatment includes sequentially subjecting the rough fabric to a first heating and heat preservation, a first cooling and heat preservation, and a second cooling and heat preservation in a degreasing agent; Preferably, the end temperature of the first heating and heat preservation is 80-100°C; Preferably, the first heating and heat preservation time is 15 to 25 minutes; Preferably, the terminal temperature of the first cooling and heat preservation is 50-70°C; Preferably, the first cooling and heat preservation time is 5 to 15 minutes; Preferably, the end temperature of the second cooling and heat preservation is 25-45°C; Preferably, the second cooling and heat preservation time is 5 to 15 minutes.

7. The preparation method according to any one of claims 1 to 6, characterized in that: The setting temperature is 130-160°C; Preferably, the cloth outlet tension of the padder during shaping is 12-16N; Preferably, the cloth outlet tension of the oven during shaping is 20-25N; Preferably, the cloth discharge speed of the oven during shaping is 12-18 m / min; Preferably, the main overfeeding ratio during shaping is 5% to 10%.

8. The preparation method according to any one of claims 1 to 7, characterized in that: The shaping process also includes adding a stabilizer to the blank fabric; Preferably, the stabilizer comprises a resin stabilizer; Preferably, the shaping process further comprises adding a composite metal salt resin catalyst to the blank fabric; Preferably, the mass ratio of the resin stabilizer to the composite metal salt resin catalyst is (2.5-4.5):

1.

9. The preparation method according to any one of claims 1 to 8, characterized in that: The preshrinking treatment is carried out in an open-width blanket preshrinking machine; Preferably, the pre-shrinkage treatment temperature is 100-120°C; Preferably, during the preshrinking process, the speed of the open-width blanket preshrinking machine is 12-18 m / min.

10. The preparation method according to any one of claims 1 to 9, characterized in that: The preparation method comprises the following steps: The wool-cellulose blended yarn is warp-woven under the conditions of a tension of 2.0-3.0 cN and a weft density of 22.6-26.6 cm / 100 to obtain a rough fabric; the rough fabric is first subjected to a degreasing treatment in a degreasing agent, and the degreasing treatment comprises: first heating and heat preservation, heating to 80-100° C. and heat preservation for 15-25 min, then cooling and heat preservation for the first time, cooling to 50-70° C. and heat preservation for 5-15 min, and then cooling and heat preservation for the second time, cooling to 25-45° C. and heat preservation for 5-15 min; then the rough fabric after the degreasing treatment is first heated to 30-50° C. in a dyeing solution at a heating rate of 0.75-1.2° C. / min, then first heat preservation for 15-30 min, and then heat preservation at 0 .75~1.2℃ / min heating rate, second heating to 55~65℃, and second heat preservation for 50~80min for dyeing; then shaping at 130~160℃, cloth discharge tension of the padder is 12~16N, cloth discharge tension of the oven is 20~25N, cloth discharge speed of the oven is 12~18m / min and main overfeed ratio is 5%~10%; and in the shaping process, resin stabilizer and composite metal salt resin catalyst are added to the blank fabric in a mass ratio of (2.5~4.5):1; finally, preshrinkage treatment is carried out at 100~120℃ using an open-width blanket preshrinking machine at a speed of 12~18m / min to obtain the wool-cellulose blended fabric.

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