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CN-121976344-A - Bio-based double-core high-elastic jean fabric

CN121976344ACN 121976344 ACN121976344 ACN 121976344ACN-121976344-A

Abstract

The invention discloses a bio-based double-core high-elastic jean fabric, and particularly relates to the field of bio-based fiber materials. The weft yarn of the fabric adopts biological-based double-core elastic ply yarn as core yarn and core yarn of outer cotton fiber, and the warp yarn is pure cotton yarn. The preparation method comprises the steps of blending spinning and crosslinking chitosan and zinc lignosulfonate to obtain elastic fiber A serving as a first core yarn, blending silk fibroin and epoxidized natural rubber emulsion containing a vulcanizing agent, carrying out wet spinning, gelation and steam vulcanization, carrying out genipin crosslinking to obtain elastic fiber B serving as a second core yarn, carrying out air network intertwining on the two core yarns to obtain a double-core ply yarn, taking the double-core ply yarn as the core yarn, wrapping cotton roving, preparing core-spun weft yarn through a sirospun process, finally weaving the core-spun weft yarn and pure cotton warp yarn into grey cloth, and carrying out desizing, dyeing, shaping and washing water treatment to obtain the final fabric. The fabric has the advantages of excellent elasticity, high bio-based content, comfort and environmental protection.

Inventors

  • QIU HONGKUN
  • HU JINFENG

Assignees

  • 江苏腾飞纺织品有限公司

Dates

Publication Date
20260505
Application Date
20260210

Claims (9)

  1. 1. The preparation method of the bio-based double-core high-elastic jean fabric is characterized by comprising the following steps of: s1, blending chitosan solution and zinc lignin sulfonate, and performing wet spinning, solidification forming, drafting and crosslinking post-treatment to obtain elastic fiber A serving as a first core yarn; s2, blending the silk fibroin solution with the epoxidized natural rubber emulsion, adding a vulcanizing agent accounting for 1-3% of the dry weight of the epoxidized natural rubber, and performing wet spinning, coagulation bath gelation, drying and steam vulcanization treatment to obtain elastic fiber B serving as a second core yarn; S3, doubling the first core yarn and the second core yarn, and intertwining through an air network to obtain a bio-based double-core elastic ply yarn; S4, spinning the bio-based double-core elastic ply yarn prepared in the step S3 serving as core yarn, cotton roving serving as outer wrapping fiber and sirospun process to prepare the core-spun yarn serving as weft yarn; S5, weaving the covering yarn prepared in the step S4 serving as weft yarns by taking pure cotton yarns as warp yarns to obtain grey cloth, and performing desizing, dyeing, shaping and washing water treatment to obtain the bio-based double-core high-elasticity jean fabric; the jean fabric is formed by interweaving warp yarns and weft yarns, the weft yarns are bio-based double-core elastic ply yarns, and the bio-based double-core elastic ply yarns are formed by intertwining and compositing first core yarns and second core yarns through an air network.
  2. 2. The bio-based double-core high-elastic jean fabric according to claim 1, wherein the specific operations for preparing the elastic fiber B in the step S2 are as follows: a1, blending a silk fibroin aqueous solution with an epoxidized natural rubber emulsion, adding a vulcanizing agent accounting for 1-3% of the dry weight of the epoxidized natural rubber, uniformly stirring, and carrying out vacuum defoaming to obtain a spinning solution; A2, extruding the spinning solution into a coagulating bath through a spinneret plate, coagulating and forming into primary fibers, drafting and washing the coagulated fibers, drying the fibers to constant weight at 50-70 ℃, and then treating the fibers for 20-40 minutes under saturated steam pressure of 0.2-0.4MPa to complete steam vulcanization of the epoxidized natural rubber; A3, immersing the vulcanized fiber in an ethanol-water solution containing 0.5-2.0wt% of genipin, oscillating for 1-3 hours at 35-45 ℃ to fully crosslink the silk fibroin, taking out the fiber, fully washing with ethanol and water, and drying at 40-60 ℃ to obtain the elastic fiber B.
  3. 3. The bio-based double-core high-elastic jean fabric according to claim 1, wherein the mass ratio of chitosan to zinc lignin sulfonate in the step S1 is (1.5-4): 1, and the post-crosslinking treatment is to dip the drawn fiber into an ethanol-water solution containing 1-3wt% glutaraldehyde, treat the fiber at 25-40 ℃ for 30-90 minutes, and then wash the fiber with water and dry the fiber.
  4. 4. The bio-based double-core high-elastic jean fabric according to claim 1, wherein in the step S1, zinc lignin sulfonate powder and a liquid plasticizer are added into acetic acid solution of chitosan, the mixture is subjected to defoaming after being reacted for 4-8 hours at 40-60 ℃ to obtain spinning stock solution, and the liquid plasticizer is 1-ethyl-3-methylimidazole acetate ionic liquid.
  5. 5. The bio-based double-core high-elastic jean fabric according to claim 1, wherein the coagulating bath in the step S2 is an aqueous solution of ammonium sulfate and ethanol, wherein the mass concentration of the ammonium sulfate is 25-35%, and the volume concentration of the ethanol is 15-25%.
  6. 6. The bio-based double-core high-elastic jean fabric according to claim 2, wherein the dry weight mass ratio of silk fibroin to epoxidized natural rubber in the step A1 is (60-80): 20-40), and the vulcanizing agent is a compound of sulfur and an accelerator DM, wherein the mass ratio is 1.5:1.
  7. 7. The biobased double-core high-elastic jean fabric according to claim 1, wherein the mass ratio of the first core yarn to the second core yarn in the biobased double-core elastic ply yarn in the step S3 is (30-50): (50-70).
  8. 8. The biobased double-core high-elastic jean fabric according to claim 1, wherein in the sirospun process of the step S4, the feeding pretension of the double-core elastic ply yarn is 3-8cN, the feeding mass ratio of the cotton roving to the core yarn is (70-85): (15-30), and the spinning twist is 600-900 twists/meter.
  9. 9. The bio-based double-core high-elastic jean fabric according to claim 1, wherein the shaping treatment in the step S5 is performed at a temperature of 90-110 ℃ for 60-120 seconds, and the washing water treatment comprises laser engraving and ozone fading processes.

Description

Bio-based double-core high-elastic jean fabric Technical Field The invention relates to the field of bio-based fiber materials, in particular to a bio-based double-core high-elastic jean fabric. Background The technical field of textile comprises links of textile material research and development, spinning technology, weaving technology, textile after-finishing and the like, and the core content of the field relates to giving specific appearance, hand feeling, physical properties and wear performance to fabrics through fiber selection, yarn structural design, fabric tissue innovation and functional finishing. Systematically, the field covers the complete industrial chain from the preparation and modification of natural and chemical fibers, spinning into threads, weaving into fabrics, dyeing, finishing and quality detection, and aims to improve the comfort, durability, functionality and environmental friendliness of the fabric. Patent CN221460630U discloses a bio-based low-carbon environment-friendly jean fabric, which is characterized in that the balance of environment protection and performance is realized through the specific interweaving structure of warp and weft and the material selection. The fabric is formed by interweaving warp yarns and weft yarns, the minimum tissue cycle is 8 warp yarns and 4 weft yarns, wherein the warp yarns adopt siro spinning to improve the luster, elasticity, strength and comfort of the fabric, the weft yarns are cotton-polyester blended short fiber double-core yarns, yarn cores comprise bio-based PTT cellulose rona and bio-based spandex, renewable biomass raw materials are utilized to reduce petroleum dependence, energy consumption and greenhouse gas emission, and the low-carbon environment-friendly concept is embodied. In the prior art, the high-elastic jean fabric has single elastic source, and has poor elasticity durability and fatigue resistance, mainly because single elastic fiber such as synthetic spandex and bio-based elastomer is relied on, but the high-elastic jean fabric has poor chlorine resistance, high temperature resistance, ultraviolet resistance and fatigue resistance, is easy to age and break after being worn, washed and sun-cured for a long time, and causes the fabric to lose elasticity and warp. This is a pain point that the industry has long remained unresolved. The bio-based elastomer partially solves the problem of chemical resistance, but has the advantages of different elastic modulus and recovery rate from spandex, high cost, high price of core bio-based raw materials such as Gao Chunsi protein, chitosan with a specific structure and an environment-friendly cross-linking agent, and the final fabric cost is far from that of main flow jean fabric in supermarket, and commercial competitiveness is lacking. Therefore, the invention provides a bio-based double-core high-elastic jean fabric. Disclosure of Invention The invention mainly aims to provide a bio-based double-core high-elasticity jean fabric, which can effectively solve the problems that the fabric is not durable in elasticity, easy to age, environment-friendly in production system and difficult to consider both style and comfort. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: The preparation of the bio-based double-core high-elastic jean fabric comprises the following steps of: s1, blending chitosan solution and zinc lignin sulfonate, and performing wet spinning, solidification forming, drafting and crosslinking post-treatment to obtain elastic fiber A serving as a first core yarn; s2, blending the silk fibroin solution with the epoxidized natural rubber emulsion, adding a vulcanizing agent accounting for 1-3% of the dry weight of the epoxidized natural rubber, and performing wet spinning, coagulation bath gelation, drying and steam vulcanization treatment to obtain elastic fiber B serving as a second core yarn; S3, doubling the first core yarn and the second core yarn, and intertwining through an air network to obtain a bio-based double-core elastic ply yarn; S4, spinning the bio-based double-core elastic ply yarn prepared in the step S3 serving as core yarn, cotton roving serving as outer wrapping fiber and sirospun process to prepare the core-spun yarn serving as weft yarn; S5, weaving the covering yarn prepared in the step S4 serving as weft yarns by taking pure cotton yarns as warp yarns to obtain grey cloth, and performing desizing, dyeing, shaping and washing water treatment to obtain the bio-based double-core high-elasticity jean fabric; Preferably, the jean fabric is formed by interweaving warp yarns and weft yarns, the weft yarns are bio-based double-core elastic ply yarns, and the bio-based double-core elastic ply yarns are formed by intertwining and compositing first core yarns and second core yarns through an air network. Preferably, the specific operation for preparing the elastic fiber B in step S2 is as follows: a1, blending a