Preparation process of degradable bio-based fiber and traditional fabric blended environment-friendly clothing

Abstract

The invention belongs to a degradable fabric preparation process, and particularly relates to a degradable bio-based fiber and traditional fabric blended environment-friendly garment preparation process, which comprises the following steps: preparing raw materials and grafting master batch, selecting dry wheat straw starch as a hydrophilic phase, adding glycerol as a plasticizer, carrying out melting reaction and extrusion, and carrying out melt extrusion to obtain the degradable bio-based fiber and traditional fabric blended environment-friendly garment. Meanwhile, dicumyl peroxide is added to initiate grafting of starch molecules and free radicals of the caprolactone modified polyester prepolymer, starch-polyester grafted master batch particles are obtained, the master batch serves as a core layer melt, a PLA / PBAT blend is selected as a shell layer, and a core-sheath structure is formed through a coaxial spinneret plate; and adding an alkyl ketene dimer (AKD) and an epoxy chain extender into a shell layer to obtain a continuous filament as-spun filament. Then drafting and heat setting, blending and yarn preparation, interface locking finishing and weaving are performed, and finally ready-made clothes are processed, so that water-induced damage is inhibited, the shape of the ready-made clothes is kept stable, and meanwhile, the degradability of the discarded clothes is not influenced.

Description

Technical Field

[0001] This invention pertains to the preparation process of biodegradable fabrics, specifically the preparation process of environmentally friendly clothing made by blending biodegradable bio-based fibers with traditional fabrics. Background Technology

[0002] The core of biodegradable bio-based fibers lies in achieving a balance between biodegradability and wearability. To achieve both biodegradability and wearability, wheat straw starch can be grafted with biodegradable polyesters (such as PLA and PBAT) to improve the water sensitivity and mechanical deficiencies of thermoplastic starch (TPS) itself, while maintaining its spinning processability. It can then be blended with cotton or linen to obtain wearability properties such as skin-friendliness, moisture wicking, and breathability.

[0003] In the spring of 2023, Anta launched a sweatshirt product using biodegradable polyester fiber as an environmental protection technology; it blends natural fibers and new polyester fibers to form an air layer fabric with blended yarn as the main component, which is soft to the touch, breathable and dry, and fluffy. It won the TOP10 award for trend and innovation outerwear at the German ISPO 2024 Spring / Summer.

[0004] Tanja Vidic, from Slovenia, blends biodegradable, unconventional materials with pop culture, employing a plain knitting technique using floating yarns and transfer needles. The knitted fabric incorporates gradient colors to mimic changes in body energy, creating an abstract visual experience.

[0005] In actual processes, biodegradable fibers can be prepared by grafting biodegradable polyesters onto a starch backbone through reactive extrusion or ring-opening polymerization to achieve in-situ compatibility, or by forming covalent or strongly interacting graft copolymers between TPS and PBAT. In this process, starch-polyester grafting will generate hydrophilic branch chains.

[0006] This type of grafting combines the hydroxyl enrichment of starch with the spinnability and strength of polyester, thus improving compatibility while preserving degradation pathways, but also introducing higher hygroscopic activity. Therefore, moisture in the wearing and washing environment first accumulates at the interface between hydrophilic branches and cotton / linen, causing hygroscopic swelling and plasticization. The difference in hygroscopic swelling and interfacial energy between different phases (cotton / linen, grafted polyester, TPS) decreases, inducing interfacial relaxation and debonding, further forming microcracks. At the same time, ester chains such as polylactic acid undergo hydrolysis under humid heat, and the molecular weight and mechanical properties decrease rapidly. The overall result is a decrease in wet strength, unstable dimensions in the first wash, and an increased risk of pilling.

[0007] Therefore, without reducing biodegradability, how to avoid water-induced strength degradation and dimensional instability during the first wash caused by hydrophilic graft chains, while maintaining the moisture-wicking and spinnability stability of the blended fabric, is an urgent problem to be solved for blended garments grafted with starch and biodegradable polyester. Summary of the Invention

[0008] The purpose of this invention is to provide an environmentally friendly garment manufacturing process that blends biodegradable bio-based fibers with traditional fabrics, in order to solve the aforementioned technical problems.

[0009] The manufacturing process for environmentally friendly clothing made by blending biodegradable bio-based fibers with traditional fabrics includes the following steps:

[0010] S1. Wheat straw starch was plasticized with 25wt% glycerol and caprolactone-modified polyester by co-rotating twin-screw extrusion grafting at 160–175℃ to obtain starch-polyester grafting masterbatch.

[0011] S2. Using the masterbatch as the core and PLA / PBAT blend as the shell, the mixture is melt-spun through a coaxial spinneret with a core:shell mass ratio of 60:40. The shell contains 1.0wt% AKD and 0.5wt% epoxy chain extender to obtain continuous filament.

[0012] S3. The filament is stretched to 3.0× at 80℃ and set at 110℃ for 30s, cut into 38mm short fibers, and conditioned at 20℃ and 65%RH for 24h.

[0013] S4. 21tex yarn is made from a blend of 40% staple fiber, 40% combed cotton, and 20% linen through opening, cleaning, carding, drawing, roving, and ring spinning.

[0014] S5. Woven into a 160g / m² plain weave fabric, and implement formaldehyde-free acetal crosslinking interface locking: Glyoxal 50g / L, MgCl2·6H2O 15g / L, pH 4.5, 70% ply residue, dry at 100–110℃ for 2min, and bake at 150℃ for 3min.

[0015] S6. The fabric is calendered at 140–150℃, cut and sewn into garments, with PLA thread and a stitch length of 3.5 stitches / cm.

[0016] Furthermore, S1 uses a co-rotating twin-screw reactive extruder with a screw diameter of 35 mm and a length-to-diameter ratio of 40:1. The amount of dicumyl peroxide is 0.5 wt% based on polyester, the screw speed is 200 r / min, the vacuum exhaust is −0.08 MPa, and the resulting masterbatch particles have a particle size of 3–5 mm.

[0017] Furthermore, in S2, the mass ratio of the shell PLA / PBAT is 50:50, the flow ratio error of the parallel metering pump closed-loop control is ≤±1%, the spinneret linear velocity is 800m / min, and the side-blown cooling air velocity is 0.6–0.8m / s.

[0018] Furthermore, the moisture conditioning conditions for short fibers in S3 are 20℃, 65%RH for 24h; the moisture content of synthetic fibers is ≤0.8%, the standard moisture regain of cotton is 7–11%, and the standard moisture regain of flax is about 12%.

[0019] Furthermore, the parameters for ring spinning in S4 are: spindle speed 14,000–14,100 r / min, total draft ratio 36, twist coefficient 330±15; the resulting single yarn evenness CV%≤14%, and single yarn breaking strength≥13cN / tex.

[0020] Furthermore, the interface locking finishing bath described in S5 has a pH of 4.5, uses a formaldehyde-free acetal crosslinking system of Glyoxal and MgCl2·6H2O, has a pick-up rate of 70%, a drying temperature of 100–110℃ for 2 min, and a baking temperature of 150℃ for 3 min.

[0021] Furthermore, in S6, biodegradable polylactic acid sewing thread is used for garment sewing, with a stitch length of 3.5 stitches / cm. Before garment sewing, the garment is calendered and shaped at 140–150°C.

[0022] Furthermore, the shell layer described in S2 contains no non-bio-based fluorosilicone water-repellent agent other than 1.0 wt% AKD and 0.5 wt% epoxy chain extender, in order to ensure the exposure and continuity of the downstream compostable degradation pathway.

[0023] Further, prior to S5, an ion-bridge anti-hair finishing step is included: the fabric is impregnated with an aqueous sodium alginate solution, wherein the sodium alginate concentration is 2.0–3.0 wt%, and 10–20 wt% glycerol is added as a plasticizer based on sodium alginate, with a roll-on rate of 60–70%, and dried at 80–100 °C for 2–3 min; subsequently, it is impregnated and rolled in a 0.1 mol / L calcium chloride solution for 5–10 min for crosslinking, washed with water and dried to form a continuous calcium alginate gel thin layer on the yarn surface to anchor the free short fibers in a dotted manner. After the finishing is completed, the interface locking finishing described in S5 is performed.

[0024] Furthermore, the shell formulation of S2 further contains 2.0 wt% diureidylpyrimidine-terminated polyurethane prepolymer, 2.0 wt% β-cyclodextrin, and 0.5 wt% nanocellulose whiskers (all based on the shell). Through UPy multiple hydrogen bonds and host-guest interactions with β-cyclodextrin, a reversible dual network is formed. The nanocellulose is used for crack deflection and interface reinforcement.

[0025] The beneficial effects achieved by the present invention using the above structure are as follows:

[0026] By implementing formaldehyde-free acetal crosslinking (Glyoxal / MgCl2) on a cotton / linen substrate, acetal bonds are formed between cellulose chains, improving wrinkle resistance and dimensional stability, and reducing the risk of interfacial energy decay and delamination under wet conditions. This type of finishing has been proven to improve heat resistance / resilience and enhance dimensional stability.

[0027] An ion-bridged anti-hair layer (NaAlg→Ca²⁺ crosslinked calcium alginate gel) is constructed on the fabric surface. Egg-box crosslinking is used to form a continuous thin layer on the yarn surface, anchoring free short fibers in a dotted manner. The alginate gel has film-forming and adhesive properties, which greatly reduces shedding under washing shear. Attached Figure Description

[0028] Figure 1 This is a flow chart of the environmentally friendly clothing manufacturing process of the present invention;

[0029] Figure 2 This is a cross-sectional view of the core-sheath bicomponent fiber of the present invention;

[0030] Figure 3 This is a comparison chart showing the warp / weft dimensional changes (%), breaking strength retention (%), water vapor transmission rate (WVTR), and material loss / microfiber release (mg / wash) of the garment prepared in this invention and the control group after multiple home washes. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] Example 1

[0033] The environmentally friendly clothing manufacturing process proposed in this invention, which involves blending biodegradable bio-based fibers with traditional fabrics, is as follows: Figure 1 As shown, it includes the following steps:

[0034] S1. Preparation of raw materials and grafting masterbatch.

[0035] Dry wheat straw starch was selected as the hydrophilic phase, and glycerol was added as a plasticizer. The amount of glycerol was 25 wt% based on starch. Deionized water was added to make the equivalent moisture content of the ingredients about 12% when they were mixed.

[0036] In a co-rotating twin-screw reactive extruder with a screw diameter of 35 mm and an aspect ratio of 40:1, melt reactive extrusion was carried out at 160–175 °C, while 0.5 wt% (based on polyester) of dicumyl peroxide was added to initiate free radical grafting of starch molecules with caprolactone-modified polyester prepolymer.

[0037] With a screw speed of 200 r / min and vacuum exhaust of −0.08 MPa, starch-polyester grafted masterbatch particles with a particle size of 3–5 mm were obtained.

[0038] S2, coaxial core-sheath melt spinning.

[0039] Using S1 masterbatch as the "core layer" melt, and selecting a PLA / PBAT blend (mass ratio 50:50) as the shell layer, the melt is metered separately by parallel metering pumps and formed through a coaxial spinneret. Figure 2 The core-sheath structure shown has a core:sheath mass ratio of 60:40, a core material temperature of 165–175℃, a shell material temperature of 175–185℃, and a metering pump flow rate ratio controlled within ±1% in a closed loop.

[0040] The shell layer contains 1.0 wt% alkyl ketene dimer (AKD) and 0.5 wt% epoxy chain extender.

[0041] Spinning speed of 800 m / min and side-blown cooling wind speed of 0.6–0.8 m / s yield continuous filament nascent yarn.

[0042] S3, stretching and heat setting.

[0043] The nascent filaments were drawn in a hot box at 80 ℃ with a draw ratio of 3.0 ± 0.2.

[0044] It is then heat-set at 110 °C for 30 s to eliminate residual stress.

[0045] It is then cut into 38 mm short fibers by a cutting machine.

[0046] To control the moisture content of each component, the short fibers were conditioned for 24 hours under standard atmospheric conditions of 20 °C and 65% RH.

[0047] The standard moisture regain corresponding to these conditions is: cotton 7–11%, flax ≈12%, and polyester 0.4–0.8%. This sets an upper limit for the moisture content of short fiber feed (synthetic fiber ≤0.8%) to reduce static electricity and entanglement.

[0048] S4. Blending and yarn preparation.

[0049] The cotton blend consists of 40% bio-based short fibers obtained from S3, 40% combed cotton, and 20% flax short fibers.

[0050] The flax raw cotton was conditioned to near its standard moisture content at 20 ℃ and 65%RH before being fed into the feedstock.

[0051] The processes of opening and cleaning cotton, carding, drawing, roving, and spinning are completed in sequence.

[0052] 21 tex yarn was produced on a ring spinning machine at a spindle speed of 14,000–14,100 r / min, a total draft ratio of 36, and a twist coefficient of 330±15.

[0053] Evenness CV%≤14%, single yarn breaking strength≥13 cN / tex, and hairiness index increases by no more than 5% compared to the control (non-bio-based short fiber).

[0054] S5, Interface Locking, Sorting, and Weaving.

[0055] After weaving a 160 g / m² plain weave fabric with 21 tex yarn, formaldehyde-free acetal crosslinking interface locking is applied:

[0056] The working solution formula is 50 g / L glyoxal, 15 g / L magnesium chloride hexahydrate, and the balance is deionized water, with a bath pH of 4.5;

[0057] Rolled off 70%, dried at 100–110 ℃ for 2 min, and baked at 150 ℃ for 3 min.

[0058] This system forms stable acetal crosslinking points on the fiber surface, which can limit the mobility of hydrophilic segments and stabilize the fiber-cotton / linen interface during the service life.

[0059] After five washes according to AATCC 135 standards, the dimensional change in the weft direction was 1.5% and in the warp direction was 1.3%, with a breaking strength retention rate of over 95%. Compared with the untreated control, the dimensional change after washing was reduced by ≥40%, and the wet strength loss was reduced by about half.

[0060] S6. Garment processing.

[0061] The fabric is calendered and set at 140–150 ℃ before being cut and sewn into T-shirts / shirts; biodegradable PLA thread is used for the stitching, with a stitch length of 3.5 stitches / cm.

[0062] Mass production sampling inspection: After the first wash, the opacity, bubbling and pilling level is ≤3-4; after 5 washes, the width change is ≤2%.

[0063] To verify the compostability of the waste end, CO2 release was recorded under controlled composting conditions of 58±2 ℃, aeration and 50–70% moisture content according to ISO 14855. The relative degradation of the samples was determined within 45–90 days and compared with the cellulose control.

[0064] like Figure 3 The figure shows a comparison of the data of the present invention and two groups of data (A and B) after home washing.

[0065] The table below shows the number of home washes required for the garments prepared according to this invention (with interface locking + ion bridge anti-hair) compared to control group A (no interface locking, only ion bridge) and group B (no ion bridge, no interface locking).

[0066] The number of times a household is washed is: 1 time, 5 times, and 10 times.

[0067] The following table shows the measured data:

[0068] Group Number of washes Size change (%) Strong retention (%) WVTR (g / m²·24h) Microfibrillary release (mg / dose) This invention 1 1.2 97 520 4.0 This invention 5 1.5 95 515 4.5 This invention 10 1.8 94 510 5.0 Compare with A 1 2.0 90 500 8.0 Compare with A 5 3.2 83 490 12.0 Compare with A 10 4.5 78 480 16.0 Compare with B 1 2.5 85 480 10.0 Compare with B 5 4.0 75 460 18.0 Compare with B 10 5.8 68 440 24.0

[0069] Example 2;

[0070] In this embodiment, by introducing a composite method of "shell self-healing double network + yarn-level ion bridge anti-hair + hydrophilic micro-domain moisture permeability restoration" on the core-sheath fiber of Example 1, the fabric does not show visible surface micro-cracks under 10 home washes (ISO 6330 procedure) and 2500 folding cycles. The microfiber mass collected by the washing filter membrane is less than 0.5 mg / sample, while the moisture permeability is increased by about 12-15% compared with Example 1.

[0071] The shell formulation consists of PLA / PBAT 50:50, with the addition of 2.0 wt% (based on shell) of diureidylpyrimidine (UPy)-terminated waterborne polyurethane prepolymer, 2.0 wt% of β-cyclodextrin, and 0.5 wt% of nanocellulose whiskers.

[0072] After melt composite formation, a dual network is formed, consisting of reversible physical cross-linking dominated by UPy quadruple hydrogen bonds and host-guest interactions of β-cyclodextrin.

[0073] Under shear and scouring loads, the network undergoes short-term strain hardening and seals submicron-sized crack tips; after resting, hydrogen bond rearrangement restores the modulus and avoids embrittlement accumulation; nanocellulose induces crack deflection and increases fracture energy.

[0074] The difference from Example 1 is that the shell no longer relies solely on AKD densification, but instead provides crack resistance and self-resetting through reversible strong interactions.

[0075] In particular, S4 includes targeted enhancements to the yarn processing:

[0076] In the ring spinning stage, the twist coefficient is increased to 360–380, and a trace amount of Ca²⁺ precursor (0.02 mol / L CaCl2) is sprayed at the end of the drawing section to facilitate the uniform distribution of subsequent crosslinking points;

[0077] After weaving into a plain weave fabric of 160 g / m², an ion-bridge anti-hair finishing process is first carried out: padding with a 2.5 wt% sodium alginate solution (with 15 wt% glycerol added as a plasticizer based on the polymer content), with a roll-off rate of 65–70%, and drying at 80–100 ℃ for 2–3 min.

[0078] Then, crosslink the sample by immersion and rolling in a 0.1 mol / L CaCl2 solution for 5–10 min, followed by washing and drying.

[0079] After cross-linking, a continuous alginate gel thin layer is formed, which anchors the free short fibers to the surface of the yarn. It is stable after washing, but can undergo ion exchange and swelling and shedding in the weak acid / multi-enzyme environment of composting.

[0080] In this embodiment, through the synergy of the ion bridge anti-hair layer and the self-healing shell layer, the coefficient of friction and surface cutting action at the fiber-fiber interface under washing friction are significantly reduced, and the amount of microfiber released is near the system detection limit.

[0081] Among them, the moisture permeability and repositioning adopts the shell layer hydrophilic microdomain scheme: β-cyclodextrin forms dispersed hydrophilic microdomains in the shell layer, which improves water vapor adsorption and diffusion; it does not undergo irreversible hydrolysis with the fiber structure, thus maintaining washability; β-cyclodextrin finishing of textiles is used to improve the hydrophilicity, carrying capacity and comfort of fabrics.

[0082] The difference from Example 1 is as follows:

[0083] One approach is to introduce a reversible dual network and hydrophilic microdomains composed of UPy-PU and β-cyclodextrin into the shell layer;

[0084] Secondly, calcium alginate ion bridging is applied to the fabric during the greige stage to prevent fuzzing before dimensional stability finishing is performed.

[0085] Third, targeted adjustments were made to the fine yarn twist coefficient and the Ca²⁺ precursor spray at the end of the drawing sliver.

[0086] This allows for the suppression of microcracks and microfibers and the restoration of moisture permeability without sacrificing dimensional stability.

[0087] If the dimensions of the first wash need to be further reduced, acetal crosslinking locking can be performed according to the parameter window of Example 1 after ion bridge treatment (Glyoxal 50 g / L, MgCl2·6H2O 15 g / L, 70% residue, drying at 100–110 ℃ for 2 min, baking at 150 ℃ for 3 min).

[0088] In this embodiment, through the combination of self-healing shell, ion bridge anti-hair, and hydrophilic microdomains, the microfiber mass measured by the filter membrane weighing method after 10 home washes is less than 0.5 mg / sample. The water vapor transmission rate of the fabric is increased by 12-15% compared with Example 1, the breaking strength retention rate is ≥94%, and there are no visible surface microcracks. The waste end is composted according to ISO 14855 (58±2 ℃, controlled ventilation and water content 50-70%). The UPy network does not affect the degradation path after the ester bond and glycosidic bond are exposed.

[0089] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A process for manufacturing environmentally friendly clothing by blending biodegradable bio-based fibers with traditional fabrics, characterized in that, Includes the following steps: S1. Wheat straw starch was plasticized with 25wt% glycerol and caprolactone-modified polyester by co-rotating twin-screw extrusion grafting at 160–175℃ to obtain starch-polyester grafting masterbatch. S2. Using the masterbatch as the core and PLA / PBAT blend as the shell, the mixture is melt-spun through a coaxial spinneret with a core:shell mass ratio of 60:

40. The shell contains 1.0wt% AKD and 0.5wt% epoxy chain extender to obtain continuous filament. S3. The filament is stretched to 3.0× at 80℃ and set at 110℃ for 30s, cut into 38mm short fibers, and conditioned at 20℃ and 65%RH for 24h. S4. 21tex yarn is made from a blend of 40% staple fiber, 40% combed cotton, and 20% linen through opening, cleaning, carding, drawing, roving, and ring spinning. S5. Woven into a 160g / m² plain weave fabric, and implement formaldehyde-free acetal crosslinking interface locking: Glyoxal 50g / L, MgCl2·6H2O 15g / L, pH 4.5, 70% ply residue, dry at 100–110℃ for 2min, and bake at 150℃ for 3min. S6. The fabric is calendered at 140–150℃, cut and sewn into garments, with PLA thread and a stitch length of 3.5 stitches / cm.

2. The environmentally friendly clothing manufacturing process according to claim 1, characterized in that, S1 uses a co-rotating twin-screw reactive extruder with a screw diameter of 35mm and a length-to-diameter ratio of 40:

1. The amount of dicumyl peroxide is 0.5wt% based on polyester, the screw speed is 200r / min, the vacuum exhaust is −0.08MPa, and the resulting masterbatch particles have a particle size of 3–5mm.

3. The environmentally friendly clothing manufacturing process according to claim 2, characterized in that, In S2, the mass ratio of PLA / PBAT in the shell is 50:50, the flow ratio error of the parallel metering pump closed-loop control is ≤±1%, the spinneret linear velocity is 800m / min, and the side-blown cooling air velocity is 0.6–0.8m / s.

4. The environmentally friendly clothing manufacturing process according to claim 1, characterized in that, The moisture conditioning conditions for S3 short fibers are 20℃, 65%RH for 24h; the moisture content of synthetic fibers should be ≤0.8% when fed, the standard moisture regain of cotton is 7–11%, and the standard moisture regain of flax is about 12%.

5. The environmentally friendly clothing manufacturing process according to claim 1, characterized in that, The parameters for ring spinning in S4 are: spindle speed 14,000–14,100 r / min, total draft ratio 36, twist coefficient 330±15; the resulting single yarn evenness CV%≤14%, and single yarn breaking strength≥13cN / tex.

6. The environmentally friendly clothing manufacturing process according to claim 1, characterized in that, The interface locking bath solution described in S5 has a pH of 4.5, uses a formaldehyde-free acetal crosslinking system of Glyoxal and MgCl2·6H2O, has a pick-up rate of 70%, a drying temperature of 100–110℃ for 2 min, and a baking temperature of 150℃ for 3 min.

7. The environmentally friendly clothing manufacturing process according to claim 1, characterized in that, In S6, biodegradable polylactic acid sewing thread is used for garment sewing, with a stitch length of 3.5 stitches / cm. Before garment sewing, the garment is calendered and shaped at 140–150℃.

8. The environmentally friendly clothing manufacturing process according to claim 1, characterized in that, The shell of S2 contains no non-bio-based fluorosilicone water-repellent agent except for AKD 1.0wt% and epoxy chain extender 0.5wt%, in order to ensure the exposure and continuity of the downstream compostable degradation pathway.

9. The environmentally friendly clothing manufacturing process according to claim 1, characterized in that, Prior to S5, an ion-bridge anti-hair finishing step is further included: the greige fabric is impregnated with an aqueous sodium alginate solution, the sodium alginate concentration being 2.0–3.0 wt%, and 10–20 wt% glycerol is added as a plasticizer based on the sodium alginate concentration, with a roll-on rate of 60–70%, and dried at 80–100 °C for 2–3 min; subsequently, it is impregnated and rolled in a 0.1 mol / L calcium chloride solution for 5–10 min for crosslinking, washed with water and dried to form a continuous calcium alginate gel thin layer on the yarn surface to anchor the free short fibers in a dotted manner. After the finishing is completed, the interface locking finishing described in S5 is then performed.

10. The environmentally friendly clothing manufacturing process according to claim 1, characterized in that, The shell formulation of S2 further contains 2.0 wt% diureidylpyrimidine-terminated polyurethane prepolymer, 2.0 wt% β-cyclodextrin, and 0.5 wt% nanocellulose whiskers (all based on the shell). The UPy multi-hydrogen bond forms a reversible dual network with the β-cyclodextrin host-guest interaction. The nanocellulose is used for crack deflection and interface reinforcement.

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