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CN-121992652-A - Preparation process of environment-friendly clothing blended by degradable bio-based fibers and traditional fabric

CN121992652ACN 121992652 ACN121992652 ACN 121992652ACN-121992652-A

Abstract

The invention belongs to a degradable fabric preparation process, in particular to an environment-friendly clothing preparation process for blending degradable bio-based fibers and traditional fabrics, which comprises the steps of preparing raw materials and grafting master batches, selecting dry wheat straw starch as a hydrophilic phase, adding glycerol as a plasticizer, carrying out melt reaction and extrusion, simultaneously adding dicumyl peroxide to initiate free radical grafting of starch molecules and caprolactone modified polyester prepolymer to obtain starch-polyester grafting master batch particles, taking the master batches as core layer melts, selecting PLA/PBAT blends as shell layers, forming a core-sheath structure through a coaxial spinneret plate, and adding Alkyl Ketene Dimer (AKD) and an epoxy chain extender into the shell layers to obtain continuous filament primary filaments. And then the finished clothes are processed through drafting and heat setting, blending and yarn preparation, interface locking finishing and weaving, so that the water-induced damage is inhibited, the stability of the finished clothes is kept, and meanwhile, the degradability of the clothes after being discarded is not influenced.

Inventors

  • Peng Luoyulin

Assignees

  • 彭罗钰琳

Dates

Publication Date
20260508
Application Date
20260318

Claims (10)

  1. 1. The preparation process of the environment-friendly garment blended by the degradable bio-based fiber and the traditional fabric is characterized by comprising the following steps of: S1, extruding and grafting wheat straw starch and caprolactone modified polyester by using a co-rotating double screw at 160-175 ℃ under the plasticization of 25wt% of glycerol to obtain a starch-polyester grafting master batch; S2, taking the master batch as a core, taking PLA/PBAT blending as a shell, and melt spinning by a coaxial spinneret plate, wherein the mass ratio of the core to the shell is 60:40, and the shell contains 1.0wt% of AKD and 0.5wt% of epoxy chain extender to obtain continuous filaments; S3, drawing the filaments at 80 ℃ for 3.0 x, shaping at 110 ℃ for 30S, cutting into 38mm short fibers, and regulating humidity at 20 ℃ and 65% RH for 24h; s4, blending 40% of short fibers, 40% of combed cotton and 20% of flax, and preparing 21tex yarns through opening and picking, carding, drawing, roving and ring spinning; s5, weaving 160g/m2 plain weave cloth, performing formaldehyde-free acetal crosslinking interface locking, namely, performing Glyoxal50g/L, mgCl 2 ·6H 2 O15 g/L, performing pH4.5, rolling the rest 70%, drying for 2min at 100-110 ℃, and performing baking for 3min at 150 ℃; s6, calendaring the fabric at 140-150 ℃, cutting and sewing the fabric into a garment, wherein the stitch is PLA, and the stitch length is 3.5 needles/cm.
  2. 2. The environment-friendly clothing preparation process according to claim 1, wherein S1 adopts a homodromous double-screw reaction extruder with a screw diameter of 35mm and an aspect ratio of 40:1, the dosage of dicumyl peroxide is 0.5wt% based on polyester, the screw rotating speed is 200r/min, the vacuum exhaust is-0.08 MPa, and the particle size of the obtained master batch particles is 3-5mm.
  3. 3. The environment-friendly clothing preparation process according to claim 2, wherein the mass ratio of the shell layer PLA/PBAT in S2 is 50:50, the closed-loop control flow ratio error of the parallel metering pumps is less than or equal to +/-1%, the yarn spraying speed is 800m/min, and the side blowing cooling wind speed is 0.6-0.8m/S.
  4. 4. The process for preparing environment-friendly clothing according to claim 1, wherein the humidity conditioning condition of the short fibers in S3 is 20 ℃ and RH 24h is 65%, the feeding water content of the synthetic fibers is less than or equal to 0.8%, the standard moisture regain of cotton is 7-11%, and the standard moisture regain of flax is about 12%.
  5. 5. The environment-friendly garment preparation process according to claim 1, wherein the ring spinning parameters in S4 are that the spindle speed is 14-14 100r/min, the total draft is 36, the twist coefficient is 330+/-15, the yarn evenness CV% is less than or equal to 14%, and the breaking strength of single yarn is more than or equal to 13cN/tex.
  6. 6. The process for preparing environment-friendly clothing according to claim 1, wherein the interface locking finishing bath solution at S5 has a pH of 4.5, a formaldehyde-free acetal crosslinking system of Glyoxal and MgCl 2 ·6H 2 O is adopted, the rolling surplus rate is 70%, the drying temperature is 100-110 ℃ and the time is 2min, and the baking temperature is 150 ℃ and the time is 3min.
  7. 7. The process for preparing environment-friendly clothing according to claim 1, wherein the sewing of the ready-made clothes in S6 adopts degradable polylactic acid sewing thread, the needle distance is 3.5 needles/cm, and the calendaring shaping is carried out at 140-150 ℃ before the ready-made clothes.
  8. 8. The process for preparing environment-friendly clothing according to claim 1, wherein the S2 shell layer is free of non-bio-based fluorosilicone water repellent except 1.0wt% of AKD and 0.5wt% of epoxy chain extender, so as to ensure exposure and continuity of a rear-end compostable degradation path.
  9. 9. The process for preparing environment-friendly clothing according to claim 1, further comprising an ion bridge hairiness-resistant finishing step before S5, wherein the grey cloth is padded with an aqueous solution of sodium alginate with a concentration of 2.0-3.0 wt%, glycerin 10-20 wt% is added as a plasticizer based on sodium alginate, the padding allowance is 60-70%, drying is carried out at 80-100 ℃ for 2-3 min, then the grey cloth is padded with a solution of 0.1mol/L calcium chloride for crosslinking 5-10 min, washing with water and drying to form a continuous calcium alginate gel thin layer on the surface of the yarn to anchor free flock in a dot shape, and the interface locking finishing is carried out after finishing is completed in S5.
  10. 10. The process for preparing environment-friendly clothing according to claim 1, wherein the shell formula of S2 further comprises 2.0 wt% of a polyurethane prepolymer with a biurea pyrimidine end group, 2.0 wt% of beta-cyclodextrin and 0.5. 0.5 wt% of nanocellulose whisker (all calculated by the shell), wherein reversible double network is formed by the actions of UPy multiple hydrogen bonds and beta-cyclodextrin host and guest, and the nanocellulose is used for crack deflection and interface enhancement.

Description

Preparation process of environment-friendly clothing blended by degradable bio-based fibers and traditional fabric Technical Field The invention belongs to a preparation process of degradable fabrics, in particular to a preparation process of environment-friendly clothing blended by degradable bio-based fibers and traditional fabrics. Background The core of the degradable bio-based fiber is to balance the degradability and the wearing durability, to realize the degradability and wearing simultaneously, wheat straw starch and degradable polyester (such as PLA and PBAT) can be adopted for grafting so as to improve the moisture sensitivity and mechanical deficiency of thermoplastic starch (TPS) and maintain the spinning processability, and then the thermoplastic starch is blended with cotton and hemp so as to obtain the wearing performances of skin-friendly, moisture-conducting, ventilation and the like. The natural fiber and the novel polyester fiber are blended to form an air layer fabric which takes the blended yarn as a main part, the air layer fabric has soft hand feeling, air permeability and dryness and fluffy bone feel, and the spring/summer trend of German ISPO2024 and the innovative coat TOP10 jacketing are obtained; Tanja Vidic from Stoney, which fuses degradable non-traditional materials with popular culture, uses a plain knitting technique of floating threads and transfer needles, uses gradual changes in knitting to simulate changes in body energy, and presents an abstract visual experience. In practice, the degradable fibers may be prepared by in situ compatibilization of the starch backbone by reactive extrusion or ring-opening polymerization of the grafted degradable polyester or by formation of a graft copolymer of covalent or strong interactions between TPS and PBAT, wherein the starch-polyester grafting results in hydrophilic branches. Therefore, the water vapor in the wearing and washing environment is firstly enriched at the interface between hydrophilic branches and cotton and hemp, so as to cause hygroscopic expansion and plasticization, the difference of hygroscopic expansion and interface energy between different phases (cotton/hemp, grafted polyester and TPS) are reduced, interfacial relaxation and debonding are induced, microcracking is further formed, and at the same time, ester chains such as polylactic acid and the like are hydrolyzed under damp and hot conditions, the molecular weight and mechanics are rapidly attenuated, and the comprehensive performance is that the wet strength is reduced, the initial washing size is unstable and the pilling risk is increased; Therefore, on the premise of not reducing the degradability, how to avoid the water-induced strong attenuation and the first-wash size instability caused by the hydrophilic graft chain in the taking period, and simultaneously, the moisture conductivity and the spinnability of the blended fabric are the problems to be solved in the blended fabric after the starch and the degradable polyester are grafted. Disclosure of Invention The invention aims to provide a preparation process of an environment-friendly garment blended by degradable bio-based fibers and traditional fabrics, so as to solve the technical problems. The preparation process of the environment-friendly garment blended by the degradable bio-based fiber and the traditional fabric comprises the following steps: S1, extruding and grafting wheat straw starch and caprolactone modified polyester by using a co-rotating double screw at 160-175 ℃ under the plasticization of 25wt% of glycerol to obtain a starch-polyester grafting master batch; S2, taking the master batch as a core, taking PLA/PBAT blending as a shell, and melt spinning by a coaxial spinneret plate, wherein the mass ratio of the core to the shell is 60:40, and the shell contains 1.0wt% of AKD and 0.5wt% of epoxy chain extender to obtain continuous filaments; S3, drawing the filaments at 80 ℃ for 3.0 x, shaping at 110 ℃ for 30S, cutting into 38mm short fibers, and regulating humidity at 20 ℃ and 65% RH for 24h; s4, blending 40% of short fibers, 40% of combed cotton and 20% of flax, and preparing 21tex yarns through opening and picking, carding, drawing, roving and ring spinning; s5, weaving 160g/m2 plain weave cloth, performing formaldehyde-free acetal crosslinking interface locking, namely, performing Glyoxal50g/L, mgCl 2·6H2 O15 g/L, performing pH4.5, rolling the rest 70%, drying for 2min at 100-110 ℃, and performing baking for 3min at 150 ℃; s6, calendaring the fabric at 140-150 ℃, cutting and sewing the fabric into a garment, wherein the stitch is PLA, and the stitch length is 3.5 needles/cm. Further, S1 adopts a homodromous double-screw reaction extruder with a screw diameter of 35mm and an aspect ratio of 40:1, the dosage of dicumyl peroxide is 0.5wt% calculated by polyester, the screw rotating speed is 200r/min, vacuum exhaust is carried out under the condition of-0.08 MPa, and the particle size of