Preparation method of comfortable hairy viscose fabric

Abstract

The invention relates to a preparation method of a comfortable wool-feeling viscose fabric. The preparation method is characterized by comprising the following steps: preparation of viscose fibers, preparation of filaments, preparation of regenerated rayon fibers, a batch warping process and a slashing process, weaving, early-stage finishing, dyeing and shaping, crease-resistant after-finishing, softening after-finishing, tentering and preshrinking. The obtained fabric is stiff and smooth in hand feeling, high in hygroscopicity, good in colored light, moderate in bidirectional elasticity, fashionable in appearance and free of itchy feeling.

Description

Technical Field

[0001] The invention relates to a method for preparing a fabric, in particular to a method for preparing a fabric using viscose fiber as yarn. Background Art

[0002] Rayon is viscose fiber, which is what we often call artificial silk. Viscose fiber is generally made of cotton linters, and the processed spinning solution is made through a wet spinning process. Rayon is heavier than silk, but it also has the characteristics of silk, such as softness and width. Viscose fiber is renewable, and the production cost is relatively low compared to other fibers. Rayon has good hygroscopicity, which is the strongest among all fibers, so the fabric has good breathability. The fabric is strong and not easy to break. Rayon has excellent spinnability, is easy to dye and is not prone to static electricity. However, rayon fabrics are easy to wrinkle, need to be ironed regularly, and may shrink during washing.

[0003] Viscose fibers are often blended with other fibers to make yarns. For example, viscose cotton staple fibers can be blended with cotton to make fine cloth, varnish, gabardine, etc. Viscose wool staple fibers, when spun alone or blended with wool, can be made into tweed, overcoat, etc. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a method for preparing a comfortable wool-feeling viscose fabric woven with rayon yarn and having good drapeability in view of the above technical status quo.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a method for preparing a comfortable wooly viscose fabric, characterized by comprising the following steps:

[0006] K. Preparation of viscose fiber: The viscose fiber is produced by using a continuous impregnation and pressing powder processing technology;

[0007] L. Preparation of filaments: The prepared viscose fibers are placed in a centrifugal spinning machine, and the spinnerets have finenesses of 2D and 3D, respectively, to produce filaments of specific finenesses;

[0008] M. Preparation of regenerated rayon fiber: Cut 2D and 3D rayon fibers to produce the required wool-type fibers according to the specific length of single fibers;

[0009] N. Preparation of regenerated rayon wool yarn: 2D regenerated rayon fiber and 3D regenerated rayon fiber are mixed in a weight ratio of 30 / 70, and a 40D spandex is added, and the yarn is spun by a compact siro spinning process to obtain a 30S / 1 rayon wool core-spun yarn;

[0010] O. Batch warping and sizing: The prepared 30S / 1 rayon core-spun yarn is subjected to batch warping, wound onto a warp beam, and subjected to sizing so that the warp yarns are all coated with a certain concentration of sizing agent. The yarns subjected to sizing are used as warp yarns, and the yarns not subjected to sizing are used as weft yarns.

[0011] P. Weaving: Adopting two-up and two-down twill structure to weave fabrics containing recycled rayon fibers;

[0012] Q. Preliminary finishing: The woven fabric is first desized to remove the sizing on the warp yarn, then bleached to remove oil and impurities on the fabric surface, and finally heat-set;

[0013] R. Dyeing and shaping: dyeing, then shaping;

[0014] S. Anti-wrinkle finishing: soak in anti-wrinkle agent and then bake;

[0015] T. Soft finishing: Softening treatment to make the fabric soft to the touch;

[0016] K. Stretching and pre-shrinking: Because the fabric contains spandex, it needs to be stretched and pre-shrunk to obtain the finished fabric.

[0017] Preferably, the specific length of the single fiber in step C is 76 cm.

[0018] Preferably, the weaving conditions described in step F are as follows: the warp density is 44 yarns / cm, the weft density is 28 yarns / cm, and the warp and weft yarns are made of the same raw materials.

[0019] Preferably, the dyeing in step H is performed using a one-bath two-step method.

[0020] Preferably, the anti-wrinkle agent in step I is citric acid with a concentration of 62-68 g / L, and the baking temperature is 142-148°C.

[0021] Preferably, the tentering conditions in step K are as follows: warp density is 51.3 strands / cm, weft density is 31 strands / cm, width is 146 cm, gram weight is 278 g / m, 190 g / m 2 The pre-shrinkage conditions are as follows: the warp shrinkage is 8% and the weft shrinkage is 9.6%.

[0022] Compared with the prior art, the advantages of the present invention are: it is prepared by regenerated rayon fiber, and then regenerated rayon core-spun yarn is prepared according to a certain ratio, which is used as the warp and weft yarns for weaving, and is woven according to a two-up and two-down twill to obtain a regenerated rayon fabric, and through some post-finishing processing technology, the final fabric has a special feel and drape. The warp and weft yarns are all single-strand core-spun yarns, so that the fabric has a certain elasticity and increases the comfort of the fabric, and the two-up and two-down twill structure is used for weaving, so that the fabric has a classic twill pattern, delicate structure, and comfortable touch. The final fabric has a crisp feel, strong hygroscopicity, good color, moderate bidirectional elasticity, and a fashionable appearance without itching. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the weft cross section of the fabric of the embodiment. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below with reference to the accompanying drawings.

[0025] Embodiment 1, this embodiment adopts basic weaving technology. First, a continuous impregnation powder processing technology is used to produce and prepare viscose fibers, and then the prepared viscose fibers are placed in a centrifugal spinning machine, and the fineness of the spinneret is set to be 2D and 3D respectively, and filaments of specific fineness are produced and prepared. The rayon fibers of 2D and 3D are cut and processed, and the required wool-type fibers are prepared according to a specific length of 76mm, which is longer than conventional long fibers. 2D regenerated rayon fibers and 3D regenerated rayon fibers are mixed in a ratio of 30 / 70, and a 40D spandex is added. The compact siro spinning process is used for spinning, and a specification of 30S / 1 rayon wool-type core-spun yarn is obtained. Because it is a single yarn, it also needs to be treated with sizing as a warp yarn to increase the weaving strength of the yarn to prevent a large number of warp breaks during excessive weaving, which affects the quality of the fabric. The regenerated rayon wool core-spun yarn is adopted, the yarn which has been subjected to a sizing process is used as the warp yarn, and the yarn which has not been subjected to a sizing process is used as the weft yarn.

[0026] The density of the grey fabric in the warp direction is 44 threads / cm, the density in the weft direction is 28 threads / cm, the width is 170cm, and the weight is 252.5g / m.

[0027] The process flow of this embodiment is: first prepare 2D and 3D rayon with a fineness, then cut it into a single fiber with a specific length of 76mm through a processing technology, take 2D regenerated rayon fiber and 3D regenerated rayon fiber and mix them in a ratio of 30 / 70, add a 40D spandex, and use the compact siro spinning process to spin the yarn to obtain a 30S / 1 rayon wool core-spun yarn. The yarn of this specification can be directly used as weft yarn for subsequent weaving. The warp yarn also uses the yarn of this specification, and carries out batch warping and sizing processes, and carries out sizing treatment to increase the breaking strength and wear resistance of the yarn, improve the efficiency of weaving, and increase the quality of the fabric. Finally, the commonly used two-up and two-down twill weave is used to cast the weft on the loom to weave the fabric. The pure rayon fabric produced is then subjected to preliminary treatment (including desizing, bleaching and heat setting), environmentally friendly dyeing and shaping, wrinkle-proof finishing, soft finishing, stretching and pre-shrinking finishing to finally obtain a regenerated rayon fiber fabric. The fabric is soft to the touch, has good drape, is light and thin, has good color and light effects, and is fashionable and comfortable.

[0028] The specific steps are as follows:

[0029] Preparation of viscose fiber: The continuous impregnation and pressing powder processing technology is used to produce viscose fiber to prepare for the subsequent filament process.

[0030] Preparation of filaments: Put the prepared viscose fibers into a centrifugal spinning machine, set the fineness of the spinneret to 2D and 3D respectively, and produce filaments of specific fineness to prepare for the subsequent preparation of regenerated rayon fibers.

[0031] Preparation of regenerated rayon fiber: Cut 2D and 3D rayon into specific lengths of 76mm to produce the required wool-type fiber, which is longer than conventional fibers. This is in preparation for the subsequent preparation of regenerated rayon wool-type yarn.

[0032] Preparation of regenerated rayon wool yarn: 2D regenerated rayon fiber and 3D regenerated rayon fiber are mixed in a ratio of 30 / 70, and a 40D spandex is added. The yarn is spun using the compact siro spinning process to obtain a 30S / 1 rayon wool core-spun yarn. This yarn is used as the weft yarn to prepare for the next weaving.

[0033] Batch warping process and sizing process: The prepared 30S / 1 rayon core-spun yarn is subjected to batch warping process, wound onto the warp beam, and subjected to sizing process so that the warp yarns are coated with a certain concentration of sizing agent in preparation for the subsequent weaving.

[0034] Weaving: It adopts a two-up and two-down twill structure with a warp density of 44 yarns / cm and a weft density of 28 yarns / cm. The warp and weft yarns of the same raw material are matched to weave a fabric containing recycled rayon fiber.

[0035] Preliminary finishing: The woven fabric is first desized to remove the sizing on the warp yarn, then bleached to remove oil and impurities on the surface of the fabric, and finally heat-set to prepare for the subsequent dyeing.

[0036] Environmentally friendly dyeing and shaping: environmentally friendly dispersion, active high temperature and high pressure one-bath two-step dyeing, after shaping treatment.

[0037] Anti-wrinkle finishing: Anti-wrinkle finishing of fabrics increases the wrinkle resistance of fabrics, and also increases the breaking strength and wear resistance of fabrics. Anti-wrinkle processing technology: Citric acid is used as an anti-wrinkle agent, and the concentration of the agent is controlled at about 65g / L. After soaking, baking treatment is carried out, and the temperature is controlled at about 145℃ to fix the wrinkle resistance of the fabric and increase the wearing performance of the fabric.

[0038] Soft finishing: Since various chemical additives are added during finishing processes such as dyeing, the fabric will feel rough and stiff, so softening treatment is required to make the fabric soft to the touch.

[0039] Stretching and pre-shrinking: Because the fabric contains spandex, it needs to be stretched and pre-shrinked. According to the final data of the finished fabric: the warp density is 51.3 strands / cm, the weft density is 31 strands / cm, the width is 146cm, the gram weight is 278g / m, 190g / m 2 The shrinkage in the warp direction is 8%, and the shrinkage in the weft direction is 9.6%, and the finished fabric is obtained after processing. The shrinkage can also be adjusted according to the specific requirements of the customer.

Claims

1. A method for preparing a comfortable wooly viscose fabric, characterized in that The steps include: A. Preparation of viscose fiber: Viscose fiber is produced by continuous impregnation and pressing powder processing technology; B. Preparation of filaments: The prepared viscose fibers are placed in a centrifugal spinning machine, and the spinnerets have finenesses of 2D and 3D, respectively, to produce filaments of specific finenesses; C. Preparation of regenerated rayon fibers: Cutting and processing 2D and 3D rayon fibers to produce the required wool-type fibers according to the specific length of single fibers; D. Preparation of regenerated rayon wool yarn: 2D regenerated rayon fiber and 3D regenerated rayon fiber are mixed in a weight ratio of 30 / 70, and a 40D spandex is added, and the yarn is spun by a compact siro spinning process to obtain a 30S / 1 rayon wool core-spun yarn; E. Batch warping and sizing process: The prepared 30S / 1 rayon core-spun yarn is subjected to batch warping, wound onto the warp beam, and subjected to sizing process so that the warp yarns are all coated with a certain concentration of sizing agent. The yarn subjected to sizing process is used as the warp yarn, and the yarn not subjected to sizing process is used as the weft yarn; F. Weaving: Adopting two-up and two-down twill structure to weave fabrics containing recycled rayon fibers; G. Preliminary finishing: The woven fabric is first desized to remove the sizing on the warp yarn, then bleached to remove oil and impurities on the fabric surface, and finally heat-set; H. Dyeing and shaping: dyeing, then shaping; I. Anti-wrinkle finishing: soaking in anti-wrinkle agent and baking after soaking; J. Soft finishing: Softening treatment is performed to make the fabric soft to the touch; K. Stretching and pre-shrinking: Because the fabric contains spandex, it needs to be stretched and pre-shrunk to obtain the finished fabric.

2. The method for preparing the comfortable wool-feel viscose fabric according to claim 1, characterized in that The specific length of the single fiber in step C is 76 cm.

3. The method for preparing the comfortable wool-feel viscose fabric according to claim 1, characterized in that The weaving conditions described in step F are as follows: the warp density is 44 yarns / cm, the weft density is 28 yarns / cm, and the warp and weft yarns are made of the same raw materials.

4. The method for preparing the comfortable wool-feel viscose fabric according to claim 1, characterized in that The dyeing described in step H is carried out using a one-bath two-step method.

5. The method for preparing the comfortable wool-feel viscose fabric according to claim 1, characterized in that The anti-wrinkle agent in step I is citric acid with a concentration of 62-68 g / L, and the baking temperature is 142-148°C.

6. The method for preparing the comfortable wool-feel viscose fabric according to claim 1, characterized in that The tentering conditions in step K are as follows: warp density is 51.3 strands / cm, weft density is 31 strands / cm, width is 146 cm, gram weight is 278 g / m, 190 g / m 2 The pre-shrinkage conditions are as follows: the warp shrinkage is 8% and the weft shrinkage is 9.6%.

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