Production method of high-elastic fabric interwoven with diacetate and regenerated cellulose fibers

Abstract

This invention discloses a method for producing a high-elasticity fabric interwoven with diacetate and regenerated cellulose fibers, relating to the field of apparel fabric technology. The technical solution includes: fabric weaving, singeing, desizing, pre-setting, setting, dyeing, opening, drying, post-setting, padding, and pre-shrinking; wherein, dyeing includes dyeing of diacetate fibers, post-dyeing treatment, and dyeing of regenerated cellulose fibers. The high-elasticity fabric interwoven with diacetate and regenerated cellulose fibers produced by this invention has high elasticity, overcomes the defects of existing technologies, ensures the strength of diacetate fibers, improves the fabric's color fastness and elasticity, and significantly reduces fingerprints, color creases, and aurora prints.

Description

Technical Field

[0001] This invention relates to the field of clothing fabric technology, specifically to a method for producing a high-elasticity fabric interwoven with diacetate and regenerated cellulose fibers. Background Technology

[0002] Traditional acetate filament fabrics, while possessing a crisp texture and strong luster, suffer from poor skin-friendliness and lack of elasticity, making them suitable only for formal occasions and unsuitable for casual or commuting wear. Fabrics interwoven with diacetate and regenerated cellulose fibers wrapped around spandex theoretically combine the dry luster of diacetate with the skin-friendly and moisture-wicking properties of regenerated cellulose fibers. Furthermore, the spandex wrapping and elastic weave enhance fabric elasticity, broadening its application scenarios.

[0003] However, the production of this type of interwoven fabric faces multiple technical bottlenecks: First, diacetate fibers inherently suffer from low strength, poor alkali resistance, low dye uptake, and poor colorfastness; second, the fabric contains spandex yarns, and the necessary high-temperature setting process during production directly damages the luster and strength of the diacetate fibers; third, the dyeing processes for diacetate fibers and regenerated cellulose fibers differ significantly, requiring a two-bath dyeing method, and the high-concentration soda ash used in the dyeing process further damages the strength of the diacetate fibers, increasing production difficulty; fourth, similar diacetate fabrics on the market commonly suffer from appearance defects such as claw marks, color creases, and aurora prints, seriously affecting product quality. Therefore, developing a production method that can solve the above technical problems, ensure the strength of diacetate fibers, improve the colorfastness and elasticity of the fabric, and improve appearance quality has become an urgent need in the industry. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a production method for high elastic fabrics interwoven with diacetate and regenerated cellulose fibers. The method is simple to operate and produces high elastic fabrics interwoven with diacetate and regenerated cellulose fibers with high elasticity, high comfort and rich color by organically combining raw materials, various processes and multiple process parameters.

[0005] The technical solution of this invention is as follows:

[0006] The production method of high-elasticity fabric interwoven with diacetate and regenerated cellulose fibers includes the following steps in sequence: fabric weaving, singeing, desizing, pre-setting, setting, dyeing, opening, drying, post-setting, padding, and pre-shrinking; Setting: temperature 190~195℃, machine speed 20~30m / min, overfeed 1~5% at the top and 1~2% at the bottom; Dyeing includes the following steps:

[0007] S1 diacetate fiber dyeing: The shaped fabric is put into an overflow dyeing equipment. At 35~45℃, 1~2g / L each of Rudolf anti-wrinkle agent JES, Lurui leveling agent LAR, and acetate HAC are added. Then disperse dye is added. The temperature is raised to 80~90℃ at a rate of 1℃ / min and maintained for 20~35min. Then the temperature is raised to 95~100℃ at a rate of 0.5~0.8℃ / min and maintained for 25~35min. Then the temperature is lowered to 60℃ at a rate of 1℃ / min. Drainage is performed after dyeing.

[0008] Post-S2 staining treatment: Wash with water for 10-15 min, add 0.5-1.5 g / L soda ash, heat to 70-80℃ at a rate of 1℃ / min, maintain for 20-25 min; then cool to 60-65℃ at a rate of 1.5℃ / min, drain; wash with water, add 1-2 g / L HAC, treat at 50-55℃ for 10-15 min, drain; soaping agent WO: 0.5-1.5 g / L, heat to 70-80℃ at a rate of 1℃ / min, maintain for 20-25 min; then cool to 60-65℃ at a rate of 1.5℃ / min, drain; wash with water for 10-15 min, drain.

[0009] S3 regenerated cellulose fiber dyeing: At 50-55℃, add 1-2 g / L each of Rudolf anti-wrinkle agent JES, Lurui leveling agent LAR, and acetate HAC, then add reactive dye and sodium sulfate. Increase the temperature to 60-65℃ at a rate of 1-1.5℃ / min and maintain for 50-60 min. Add 0.5-2.5 g / L of soda ash, drain, wash with water for 10-15 min, and drain again. Use soaping agent WO: 0.5-1.5 g / L, increase the temperature to 70-80℃ at a rate of 1℃ / min and maintain for 20-25 min. Then decrease the temperature to 60-65℃ at a rate of 1.5℃ / min, drain, wash with water for 10-15 min, and drain again.

[0010] Rolling material: CEFASOFT MSR 30~40g / L silicone softener, temperature 150~160℃, speed 20~30m / min.

[0011] Preferably, the fabric is woven using a rapier loom, with 75D, 100D, 120D or 150D diacetate fiber in the warp and 20~50S regenerated cellulose fiber core-spun spandex yarn in the weft, and a double-layer structure is applied.

[0012] Preferred method: singeing speed 90~100m / min, flame intensity 8~12, cutting and burning.

[0013] Preferred desizing agent: TRANSIGEN TF-127HLB 10~20g / L, TRANSIRON TF-133FLB 5~10g / L, CRUISEA LFX 4~6g / L; overflow rate 15~30L / min; water washing temperature: 50~60℃ / 80~95℃ / 85~95℃ / 75~95℃ / 50~60℃; machine speed: 20~30m / min.

[0014] Preferred type: The fabric is expanded and shaped at 180~190℃, with a speed of 15~35m / min and an overfeed of 1~3%.

[0015] Preferably, the drying process involves a temperature of 110~130℃, an overfeed of 1~3%, and a vehicle speed of 20~30m / min.

[0016] Preferred post-setting conditions: temperature 160~180℃, vehicle speed 20~30m / min, overfeed 1~5% at the top and 1~2% at the bottom.

[0017] Preferred pre-shrinkage: vehicle speed 20~30m / min, rubber blanket temperature 90~120℃, felt blanket temperature 90~120℃.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. The high-elasticity fabric produced by this invention, which is a blend of diacetate and regenerated cellulose fibers, combines high elasticity with a comfortable feel. It retains the dry luster of diacetate fibers while leveraging the skin-friendly and moisture-wicking advantages of regenerated cellulose fibers. Furthermore, through scientific process design, the core mechanical properties of the fabric, such as breaking strength and tear strength, are significantly improved, meeting the durability requirements of various wearing scenarios.

[0020] 2. This invention effectively solves the problems of low dyeing rate and poor color fastness of diacetate fibers by precisely controlling the dyeing temperature, heating rate and reagent dosage, combined with targeted post-dyeing treatment processes. The fabric achieves a color fastness of grade 3 or above in terms of water washing resistance, soap washing resistance and perspiration resistance, and the heat shrinkage rate is controlled within a reasonable range, with excellent dimensional stability.

[0021] 3. This invention adds a special anti-wrinkle agent and leveling agent to the dyeing process, and with gentle heating and cooling rates and process parameters, it reduces appearance problems such as chicken claw marks, color crease marks, and aurora marks from the source, ensuring that the fabric surface is flat and smooth and improving the visual quality of the product.

[0022] 4. In view of the differences in characteristics between diacetate fiber and regenerated cellulose fiber, this invention optimizes the two-bath dyeing process to avoid damage to diacetate fiber caused by high concentration of soda ash, while being compatible with the high-temperature setting requirements of spandex yarn. Under the premise of ensuring product performance, it reduces production difficulty and improves production stability and yield. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of this invention will be clearly and completely described below in conjunction with the embodiments of this invention.

[0024] Example 1: Weight 150~170g / m 2 Production method of high-elasticity fabric interwoven with diacetate and regenerated cellulose fibers

[0025] Includes the following steps:

[0026] 1) Fabric weaving: Rapier looms are used, with 75D diacetate fiber in the warp and 50S regenerated cellulose fiber core-spun spandex yarn in the weft, and a double-layer structure is applied for fabric weaving;

[0027] 2) Singeing: Vehicle speed 100m / min, flame intensity 8, cutting and burning;

[0028] 3) Desizing: The BO-2000 relaxation desizing machine from Hongrong Dyeing and Finishing Machinery Co., Ltd. was used. The desizing refining agent TRANSIGEN TF-127HLB was 10g / L, the chelating dispersant TRANSIRON TF-133FLB was 5g / L, and the degreasing agent CRUISEALFX was 4g / L. The overflow rate was 20L / min. The washing temperature was 60℃ / 90℃ / 90℃ / 90℃ / 60℃. The machine speed was 30m / min.

[0029] 4) Pre-setting: The fabric is expanded and set at 180℃, with a machine speed of 35m / min and an overfeed of 1%;

[0030] 5) Shaping: Temperature 190℃, vehicle speed 30m / min, overfeed 2% at the top, 1% at the bottom;

[0031] 6) Dyeing of diacetate fibers: Put the fabric into an overflow dyeing equipment. At 35°C, add 1 g / L each of Rudolf anti-wrinkle agent JES, Lure leveling agent LAR, and acetate HAC. Then add disperse dye and heat to 80°C at a rate of 1°C / min, and maintain for 20 min. Then heat to 95°C at a rate of 0.5°C / min and maintain for 25 min. Then cool down to 60°C at a rate of 1°C / min. Drain the water after dyeing.

[0032] 7) Post-dyeing treatment: Wash with water for 15 min, add 0.5 g / L soda ash, heat to 70°C at a rate of 1°C / min, maintain for 20 min; then cool to 60°C at a rate of 1.5°C / min, drain; add 1 g / L HAC, treat at 50°C for 10 min, drain; add 0.5 g / L WO soaping agent, heat to 70°C at a rate of 1°C / min, maintain for 20 min; then cool to 60°C at a rate of 1.5°C / min, drain; wash with water for 10 min, drain.

[0033] 8) Dyeing of regenerated cellulose fibers: At 50℃, add 1g / L each of Rudolf anti-wrinkle agent JES, Rurui leveling agent LAR, and acetate HAC, then add reactive dye and sodium sulfate, and heat to 60℃ at a rate of 1℃ / min, maintaining for 50min; add 0.5g / L of soda ash; drain, wash with water for 10min, and drain again; use soaping agent WO: 0.5g / L, heat to 70℃ at a rate of 1℃ / min, maintaining for 20min; then cool to 60℃ at a rate of 1.5℃ / min, drain, wash with water for 10min, and drain again.

[0034] 9) Vacuum water absorption opening width;

[0035] 10) Drying: Temperature 110℃, overfeed 1%, vehicle speed 20m / min;

[0036] 11) Post-setting: Temperature 160℃, vehicle speed 30m / min, overfeed 1% at the top and 1% at the bottom;

[0037] 12) Rolling material: CEFASOFT MSR 30g / L silicone softener, temperature 150℃, machine speed 30m / min;

[0038] 13) Pre-shrinkage: vehicle speed 30m / min, rubber blanket temperature 100℃, felt blanket temperature 100℃.

[0039] Example 2: Weight 250~280g / m 2 Production method of high-elasticity fabric interwoven with diacetate and regenerated cellulose fibers

[0040] Includes the following steps:

[0041] 1) Fabric weaving: Rapier looms are used, with 100D diacetate fiber in the warp and 40S regenerated cellulose fiber core-spun spandex yarn in the weft, and a double-layer structure is applied for fabric weaving;

[0042] 2) Singeing: Vehicle speed 90m / min, flame intensity 10, cutting and burning;

[0043] 3) Desizing: The BO-2000 relaxation desizing machine from Hongrong Dyeing and Finishing Machinery Co., Ltd. was used. The desizing refining agent TRANSIGEN TF-127HLB was 15g / L, the chelating dispersant TRANSIRON TF-133FLB was 10g / L, and the degreasing agent CRUISEALFX was 5g / L. The overflow rate was 30L / min. The washing temperature was 60℃ / 95℃ / 95℃ / 95℃ / 60℃. The machine speed was 25m / min.

[0044] 4) Pre-setting: The fabric is expanded and set at 185℃, with a machine speed of 25m / min and an overfeed of 2%;

[0045] 5) Setting: Temperature 190℃, vehicle speed 20m / min, overfeed 5% at the top, overfeed 2% at the bottom;

[0046] 6) Dyeing of diacetate fibers: Put the fabric into an overflow dyeing equipment. At 40℃, add 1.5g / L each of Rudolf anti-wrinkle agent JES, Lurui leveling agent LAR, and acetate HAC. Then add disperse dye. Increase the temperature to 80℃ at a rate of 1℃ / min and maintain for 30min. Then increase the temperature to 95℃ at a rate of 0.6℃ / min and maintain for 30min. Then decrease the temperature to 60℃ at a rate of 1℃ / min. Drain the water after dyeing.

[0047] 7) Post-dyeing treatment: Wash with water for 15 min, add 1 g / L soda ash, heat to 75°C at a rate of 1°C / min, maintain for 25 min; then cool to 60°C at a rate of 1.5°C / min, drain; add 1.5 g / L HAC, treat at 50°C for 15 min, drain; add 1 g / L WO soaping agent, heat to 70°C at a rate of 1°C / min, maintain for 25 min; then cool to 60°C at a rate of 1.5°C / min, drain; wash with water for 15 min, drain.

[0048] 8) Dyeing of regenerated cellulose fibers: At 50℃, add 1.5g / L each of Rudolf anti-wrinkle agent JES, Rurui leveling agent LAR, and acetate HAC, then add reactive dye and sodium sulfate, raise the temperature to 60℃ at a rate of 1.5℃ / min, and maintain for 60min; add 1.5g / L of soda ash; drain, wash with water for 15min, and drain again; use soaping agent WO: 1g / L, raise the temperature to 70℃ at a rate of 1℃ / min, and maintain for 25min; then lower the temperature to 60℃ at a rate of 1.5℃ / min, drain, wash with water for 15min, and drain again.

[0049] 9) Vacuum water absorption opening width;

[0050] 10) Drying: Temperature 120℃, overfeed 2%, vehicle speed 30m / min;

[0051] 11) Post-setting: Temperature 170℃, vehicle speed 30m / min, overfeed 3% at the top, overfeed 2% at the bottom;

[0052] 12) Rolling material: CEFASOFT MSR 35g / L silicone softener, temperature 150℃, machine speed 20m / min;

[0053] 13) Pre-shrinkage: vehicle speed 25m / min, rubber blanket temperature 110℃, felt blanket temperature 110℃.

[0054] Example 3: Weight 280~350g / m 2 Production method of high-elasticity fabric interwoven with diacetate and regenerated cellulose fibers

[0055] Includes the following steps:

[0056] 1) Fabric weaving: Rapier looms are used, with 150D diacetate fiber in the warp and 20S regenerated cellulose fiber core-spun spandex yarn in the weft, and a double-layer structure is applied for fabric weaving;

[0057] 2) Singeing: Vehicle speed 90m / min, flame intensity 12, cutting and burning;

[0058] 3) Desizing: The BO-2000 relaxation desizing machine from Hongrong Dyeing and Finishing Machinery Co., Ltd. was used. The desizing refining agent TRANSIGEN TF-127HLB was 20g / L, the chelating dispersant TRANSIRON TF-133FLB was 10g / L, and the degreasing agent CRUISEALFX was 6g / L. The overflow rate was 30L / min. The washing temperature was 60℃ / 95℃ / 95℃ / 95℃ / 60℃. The machine speed was 20m / min.

[0059] 4) Pre-setting: The fabric is expanded and set at 185℃, with a machine speed of 20m / min and an overfeed of 3%;

[0060] 5) Setting: Temperature 195℃, vehicle speed 20m / min, overfeed 5% at the top, overfeed 2% at the bottom;

[0061] 6) Dyeing of diacetate fibers: Put the fabric into an overflow dyeing equipment, add 2g / L each of Rudolf anti-wrinkle agent JES, Lurui leveling agent LAR, and acetate HAC at 45℃, then add disperse dye, raise the temperature to 90℃ at a rate of 1℃ / min and maintain for 35min; then raise the temperature to 100℃ at a rate of 0.8℃ / min and maintain for 35min; then lower the temperature to 60℃ at a rate of 1℃ / min, and drain the water after dyeing.

[0062] 7) Post-dyeing treatment: Wash with water for 15 min, add 1.5 g / L soda ash, heat to 80°C at a rate of 1°C / min, maintain for 25 min; then cool to 60°C at a rate of 1.5°C / min, drain; add 2 g / L HAC, treat at 55°C for 15 min, drain; add 1.5 g / L WO soaping agent, heat to 80°C at a rate of 1°C / min, maintain for 25 min; then cool to 60°C at a rate of 1.5°C / min, drain; wash with water for 15 min, drain.

[0063] 8) Dyeing of regenerated cellulose fibers: At 55℃, add 2g / L each of Rudolf anti-wrinkle agent JES, Rurui leveling agent LAR, and acetate HAC, then add reactive dye and sodium sulfate, raise the temperature to 60℃ at a rate of 1.5℃ / min, and maintain for 60min; add 2.5g / L of soda ash; drain, wash with water for 15min, and drain again; use soaping agent WO: 1.5g / L, raise the temperature to 80℃ at a rate of 1℃ / min, and maintain for 25min; then lower the temperature to 60℃ at a rate of 1.5℃ / min, drain, wash with water for 15min, and drain again.

[0064] 9) Vacuum water absorption opening width;

[0065] 10) Drying: Temperature 130℃, overfeed 3%, vehicle speed 20m / min;

[0066] 11) Post-setting: Temperature 180℃, vehicle speed 20m / min, overfeed 5% at the top, overfeed 2% at the bottom;

[0067] 12) Rolling material: CEFASOFT MSR 40g / L silicone softener, temperature 160℃, speed 20m / min;

[0068] 13) Pre-shrinkage: vehicle speed 30m / min, rubber blanket temperature 120℃, felt blanket temperature 120℃.

[0069] Comparative Example 1

[0070] The difference from Example 3 is that: 5) Shaping: temperature 200℃, speed 20m / min, overfeed 5% at the top and 2% at the bottom; 9) Dehydration; 12) Rolling: weak cationic softener KN-202, temperature 130℃, speed 50m / min.

[0071] Comparative Example 2

[0072] The difference from Example 3 is that the following steps are used instead of steps 6)-8) in Example 3).

[0073] 6) Dyeing of diacetate fibers: Put the fabric into an overflow dyeing equipment, add 2g / L each of Rudolf anti-wrinkle agent JES, Lurui leveling agent LAR, and acetate HAC at 45℃, then add disperse dye, raise the temperature to 70℃ at a rate of 1℃ / min and maintain for 20min; then raise the temperature to 105℃ at a rate of 1℃ / min and maintain for 45min; then lower the temperature to 70℃ at a rate of 1℃ / min, and drain the water after dyeing.

[0074] 7) Dyeing of regenerated cellulose fibers: At 50℃, add 1g / L each of Rudolf anti-wrinkle agent JES, Lurui leveling agent LAR, and acetate HAC, then add reactive dye and sodium sulfate, raise the temperature to 60℃ at a rate of 1℃ / min, and maintain for 40min; add 0.5g / L of soda ash; drain, wash with water for 15min, and drain again; use soaping agent WO: 0.5g / L, raise the temperature to 80℃ at a rate of 1.5℃ / min, and maintain for 10min; then lower the temperature to 70℃ at a rate of 1.5℃ / min, drain, wash with water for 10min, and drain again.

[0075] Comparative Example 3

[0076] The difference from Example 3 is that step 8) dyeing of regenerated cellulose fibers adopts the same operation method as step 6) dyeing of diacetate fibers.

[0077] Comparative Example 4

[0078] The difference from Example 3 is that step 6) dyeing of diacetate fibers adopts the operation method of step 8) dyeing of regenerated cellulose fibers.

[0079] The fabrics obtained in the above embodiments and comparative examples were subjected to performance tests. The breaking strength was tested according to GB / T 3923.2-2013 "Textiles - Tensile Properties of Fabrics - Part 2: Determination of Breaking Strength (Grab Method)"; the tearing strength was tested according to GB / T 3917.2-2009 "Textiles - Tear Properties of Fabrics - Part 2: Determination of Tear Strength of Trousers Specimen (Single Seam)"; the slippage was tested according to GB / T 13772.2-2008 "Textiles - Determination of Yarn Slippage Resistance at Seams of Woven Fabrics - Part 2: Constant Load Method"; the elasticity was tested according to ASTM D3107-07 (2015) "Test Method for Elastic Properties of Woven Fabrics Made of Elastic Yarn"; the color fastness to washing was tested according to GB / T 5713-2013 "Textiles - Tests for Color Fastness to Water"; and the color fastness to soaping was tested according to GB / T The color fastness to soaping was tested according to GB / T 3921-2008 "Textiles - Tests for Color Fastness to Washing"; the color fastness to perspiration was tested according to GB / T 3922-2013 "Textiles - Tests for Color Fastness to Perspiration"; the heat shrinkage rate was tested according to FZ / T 20021-2012 "Test Method for Dimensional Changes of Fabrics After Steaming"; fabric surface effects (chicken claw prints, aurora prints, color folding prints, etc.) were tested by visual observation. The test results are shown in Table 1-2.

[0080] Table 1 Performance test results of fabrics in each embodiment

[0081]

[0082] Table 2 Performance test results of fabrics in each comparative example

[0083]

[0084] The test results above show that in Comparative Example 1, the excessively high setting temperature and mismatched rolling process led to the high-temperature setting damaging the fiber structure and causing thermal degradation of the fiber molecular chains. This resulted in a sharp drop in breaking strength from 572N (warp) and 810N (weft) to 220N and 470N, and tearing strength from 19N and 23N to 7N and 10N. The high temperature also damaged the elastic recovery performance of the spandex yarn, causing the fabric elasticity to drop from 43 / 65.6 / 12.8 to 22 / 71 / 5.2, resulting in a significant decrease in elasticity retention. Furthermore, the high temperature caused the fabric's heat shrinkage rate to deteriorate out of control, from -1.5% / -2.5% to -3.6% / -4%, resulting in a loss of dimensional stability.

[0085] The padding process is incompatible with the fabric characteristics: the weak cationic softener KN-202 is not compatible with the hydrophobicity of diacetate fibers, and cannot form a uniform protective film on the fiber surface, resulting in an increase in the coefficient of friction of the fabric surface and the generation of aurora marks and color crease marks; when the speed is increased to 50m / min, the contact time between the fabric and the roller is insufficient, and the softener penetration is uneven; when the temperature drops to 130℃, the softener cannot be fully fixed, further aggravating the uneven gloss and crease problems of the fabric surface.

[0086] Comparative Example 2 omitted post-dyeing treatment and deviated from the diacetate dyeing process parameters. The lack of post-dyeing treatment led to multiple problems: Example 3's post-dyeing treatment included four steps: "neutralization with soda ash - pH adjustment with acetic acid - soaping - water washing." Its core function was to remove surface dye and stabilize the dye's binding state. In Comparative Example 2, omitting this step resulted in residual dye, causing the colorfastness to water washing to decrease from 4 / 3~4 to 3~4 / 3, and the colorfastness to soaping to decrease from 4 / 4 to 3~4 / 3~4. The residual dye was not firmly bound to the fiber, making it prone to rubbing and detachment during subsequent processing, leading to severe abrasions on the fabric surface. This was the core reason for its appearance defects. Deviations in diacetate dyeing parameters disrupt dyeing uniformity: In Example 3, the dye was kept at 90℃ for 35 minutes to allow time for uniform dye penetration. In Comparative Example 2, the heating rate was too fast (1℃ / min throughout, without segmented temperature control), directly and uniformly heating to 105℃. The dye quickly accumulated on the fiber surface, resulting in uneven dyeing. At the same time, 105℃ exceeds the safe dyeing temperature (95~100℃) for diacetate fibers, damaging the fiber structure and reducing breaking strength and tearing strength. The cooling endpoint was too high, resulting in insufficient covalent bonding between the dye and the fiber, further reducing color fastness and fabric smoothness.

[0087] Comparative Example 3 used diacetate dyeing to replace regenerated cellulose fiber dyeing. The dye and fiber compatibility was completely incompatible. Diacetate fiber is hydrophobic and requires disperse dyeing; regenerated cellulose fiber is hydrophilic and requires reactive dyes for covalent bonding. In Comparative Example 3, the disperse dyes treated the regenerated cellulose fibers failed to penetrate the fiber interior, remaining only on the surface, resulting in insufficient color depth. Furthermore, the disperse dyes lacked chemical bonding with the regenerated cellulose fibers, leading to extremely poor color fastness. Wash fastness decreased from 4 / 4 to 2 / 1-2, and perspiration fastness decreased from 4 / 4 to 3 / 2-3. The dyeing process parameters were unsuitable for hydrophilic fibers. The initial temperature (45℃) and heating rate (1℃ / min) of the diacetate dyeing did not consider the hygroscopic expansion characteristics of regenerated cellulose fibers, hindering dye diffusion and resulting in insufficient dye uptake. The absence of essential dyeing agents such as sodium sulfate (dyeing accelerator) and soda ash (fixing agent) further reduced dye binding efficiency, ultimately resulting in insufficient color depth and a general decline in color fastness.

[0088] Comparative Example 4 used a regenerated cellulose fiber dyeing process to replace diacetate fiber dyeing. The dyeing system conflicted with the characteristics of diacetate fiber. The reactive dyes used for regenerated cellulose dyeing need to be fixed under alkaline conditions, but diacetate fiber is not alkali resistant. The alkaline environment will cause the fiber to hydrolyze, and the breaking strength will decrease from 572N and 810N to 375N and 550N, and the tearing strength will decrease from 19N and 23N to 8.4N and 11.7N. The reactive dyes have no affinity with diacetate fiber and cannot form an effective bond. Most of the dye is lost, resulting in the fabric color depth not meeting the requirements. The color fastness to washing and soaping both decreased from level 4 to level 3. The initial dyeing temperature of regenerated cellulose (55℃) is higher than that of diacetate dyeing (35~45℃), and the heating rate (1.5℃ / min) is faster, which leads to rapid condensation of dye on the surface of diacetate fiber and uneven dyeing. The high temperature in the fixation stage further aggravates the loss of strength of diacetate fiber, while the heat shrinkage rate deteriorates from -1.5% / -2.5% to -2.5% / -3%, and the dimensional stability decreases.

[0089] In summary, the fabrics treated with this invention meet the quality requirements for fabrics in terms of breaking strength, tear strength, and elasticity, and their performance is far superior to that of ordinary diacetate products.

Claims

1. A method for producing a high-elasticity fabric interwoven with diacetate and regenerated cellulose fibers, comprising the following steps in sequence: The process includes fabric weaving, singeing, desizing, pre-setting, setting, dyeing, opening, drying, post-setting, padding, and pre-shrinking; characterized by setting at a temperature of 190~195℃, a machine speed of 20~30m / min, and overfeeding of 1~5% at the top and 1~2% at the bottom; dyeing includes the following steps: S1 diacetate fiber dyeing: The shaped fabric is put into an overflow dyeing equipment. At 35~45℃, 1~2g / L each of Rudolf anti-wrinkle agent JES, Lurui leveling agent LAR, and acetate HAC are added. Then disperse dye is added. The temperature is raised to 80~90℃ at a rate of 1℃ / min and maintained for 20~35min. Then the temperature is raised to 95~100℃ at a rate of 0.5~0.8℃ / min and maintained for 25~35min. Then the temperature is lowered to 60℃ at a rate of 1℃ / min. Drainage is performed after dyeing. Post-S2 staining treatment: Wash with water for 10-15 min, add 0.5-1.5 g / L soda ash, heat to 70-80℃ at a rate of 1℃ / min, maintain for 20-25 min; then cool to 60-65℃ at a rate of 1.5℃ / min, drain; wash with water, add 1-2 g / L HAC, treat at 50-55℃ for 10-15 min, drain; soaping agent WO: 0.5-1.5 g / L, heat to 70-80℃ at a rate of 1℃ / min, maintain for 20-25 min; then cool to 60-65℃ at a rate of 1.5℃ / min, drain; wash with water for 10-15 min, drain. S3 regenerated cellulose fiber dyeing: At 50-55℃, add 1-2 g / L each of Rudolf anti-wrinkle agent JES, Lurui leveling agent LAR, and acetate HAC, then add reactive dye and sodium sulfate. Increase the temperature to 60-65℃ at a rate of 1-1.5℃ / min and maintain for 50-60 min. Add 0.5-2.5 g / L of soda ash, drain, wash with water for 10-15 min, and drain again. Use soaping agent WO: 0.5-1.5 g / L, increase the temperature to 70-80℃ at a rate of 1℃ / min and maintain for 20-25 min. Then decrease the temperature to 60-65℃ at a rate of 1.5℃ / min, drain, wash with water for 10-15 min, and drain again. Rolling material: CEFASOFT MSR 30~40g / L silicone softener, temperature 150~160℃, speed 20~30m / min.

2. The method for producing a high-elasticity fabric interwoven with diacetate and regenerated cellulose fibers as described in claim 1, characterized in that, Fabric weaving: Rapier looms are used, with 75D, 100D, 120D or 150D diacetate fibers in the warp and 20~50S regenerated cellulose fiber core-spun spandex yarn in the weft. A double-layer structure is used for fabric weaving.

3. The method for producing a high-elasticity fabric interwoven with diacetate and regenerated cellulose fibers as described in claim 1, characterized in that, Singeing: vehicle speed 90~100m / min, flame intensity 8~12, cutting and burning.

4. The method for producing a high-elasticity fabric interwoven with diacetate and regenerated cellulose fibers as described in claim 1, characterized in that, Desizing: TRANSIGEN TF-127HLB 10~20g / L desizing refining agent, TRANSIRON TF-133FLB 5~10g / L chelating dispersant, CRUISEA LFX 4~6g / L degreasing agent; overflow rate 15~30L / min; water washing temperature: 50~60℃ / 80~95℃ / 85~95℃ / 75~95℃ / 50~60℃; machine speed: 20~30m / min.

5. The method for producing a high-elasticity fabric interwoven with diacetate and regenerated cellulose fibers as described in claim 1, characterized in that, Pre-setting: The fabric is expanded and set at 180~190℃, with a speed of 15~35m / min and an overfeed of 1~3%.

6. The method for producing a high-elasticity fabric interwoven with diacetate and regenerated cellulose fibers as described in claim 1, characterized in that, Drying: Temperature 110~130℃, overfeed 1~3%, vehicle speed 20~30m / min.

7. The method for producing a high-elasticity fabric interwoven with diacetate and regenerated cellulose fibers as described in claim 1, characterized in that, Post-setting: Temperature 160~180℃, vehicle speed 20~30m / min, overfeed 1~5% at the top and 1~2% at the bottom.

8. The method for producing a high-elasticity fabric interwoven with diacetate and regenerated cellulose fibers as described in claim 1, characterized in that, Pre-shrinkage: vehicle speed 20~30m / min, rubber blanket temperature 90~120℃, felt blanket temperature 90~120℃.

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