Preparation method of bio-based hole cloth fabric

Abstract

The invention discloses a preparation method of a bio-based hole cloth fabric. The preparation method comprises the following steps: yarn selection and matching: nylon spandex wrap yarns obtained by wrapping bio-based spandex with bio-based nylon are used as warp yarns A and weft yarns A, and alkali fuse spandex wrap yarns obtained by wrapping bio-based spandex with alkali fuse are used as warp yarns B and weft yarns B; weaving: weaving the selected yarns according to design requirements to obtain a fabric; and dyeing and finishing: sequentially carrying out pretreatment, pre-shaping, alkali decrement, dyeing, soaping fixation and shaping on the fabric to obtain the bio-based hole cloth fabric. According to the material-based hole cloth fabric, the bio-based spandex and the bio-based nylon 56 are adopted as main materials, dependence on fossil fuel is reduced, good sustainability and environment friendliness are achieved, the influence on the environment is reduced, and the requirement of the modern society for environment protection is met.

Description

Technical Field

[0001] The invention relates to a method for preparing a bio-based hole cloth fabric, and belongs to the technical field of clothing fabrics. Background Art

[0002] In today's society, with the continuous improvement of living standards and the increasing popularity of outdoor sports, people's demand for summer sun protection clothing has shown a significant growth trend. When choosing summer sun protection clothing, consumers are no longer satisfied with the basic sun protection function, but have higher requirements for its breathability, fashion and aesthetics. At the same time, the awakening of environmental awareness and the in-depth implementation of the concept of sustainable development have prompted the textile industry to actively explore more environmentally friendly material development and process innovation paths.

[0003] In the current market, sun protection clothing is mostly made of polyester as the main raw material. However, polyester products have inherent defects such as poor wear resistance and poor moisture conductivity, which makes the wearer experience poor during use and cannot meet their actual needs in outdoor activities. In contrast, nylon fabric, as a thin and durable fiber material, has many advantages, such as good air permeability and strong moisture absorption, which can effectively keep the skin dry and comfortable. Moreover, compared with polyester textiles, nylon textiles feel softer, have excellent wrinkle resistance, and are more convenient to store, so they are favored by consumers.

[0004] Nylon four-way stretch fabric is a new type of fabric obtained by blending nylon and spandex. With the advantages of nylon and spandex, this fabric has better elasticity and wear resistance, and has been widely used in the preparation of outdoor casual pants, tops and jackets. In the past two years, in order to achieve environmental protection, bio-based nylon 56 has been successfully developed and applied. A bio-based nylon four-way stretch hole cloth fabric has appeared on the market. Its production principle is to use the characteristics of polyester alkali-soluble silk that can be dissolved in water under alkaline conditions. In the weaving process, the tissue structure is carefully designed so that the bio-based nylon spandex coated yarn and the polyester alkali-soluble silk are arranged as warp and weft yarns in a specific proportion. In the pre-treatment process of the grey cloth, the characteristics of bio-based nylon being alkali-resistant and alkali-soluble silk being not alkali-resistant are fully utilized to dissolve the alkali-soluble silk, thereby forming a hole cloth with a unique visual effect. In addition, this fabric has good breathability, providing consumers with a novel choice.

[0005] However, for now, the spandex-coated yarn in the bio-based nylon four-way stretch holey cloth still uses traditional spandex. The production of traditional spandex and its related fabrics has long been highly dependent on petrochemical-based raw materials, which not only causes the consumption of a large amount of non-renewable resources, but also generates considerable carbon emissions during the entire production and use cycle, bringing a heavy burden to the ecological environment. Therefore, such bio-based nylon four-way stretch holey cloth fabric products are not 100% bio-based products, and it is difficult to meet the market's ardent expectations for textile products that have both high performance, multi-functionality and green environmental protection characteristics. This also poses a technical problem that needs to be solved urgently for the textile industry, that is, how to develop a new type of fabric that has both the breathability and aesthetic characteristics of holey cloth and the full bio-based characteristics to meet the urgent needs of today's society for environmentally friendly and carbon-reducing products. Summary of the invention

[0006] The purpose of the present invention is to provide a method for preparing a bio-based holey cloth fabric, which uses bio-based spandex and bio-based nylon 56 as main materials, reduces dependence on fossil fuels, has good sustainability and environmental protection, reduces the impact on the environment, and meets the environmental protection requirements of modern society.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A method for preparing a bio-based hole cloth fabric comprises the following steps:

[0009] S1. Yarn selection: nylon-spandex coated yarn obtained by coating bio-based nylon with bio-based spandex is used as warp yarn A and weft yarn A, and alkali-fused spandex coated yarn obtained by coating bio-based spandex with alkali-fused yarn is used as warp yarn B and weft yarn B;

[0010] S2, weaving: using the selected yarn and weaving according to the design requirements to obtain the fabric;

[0011] S3. Dyeing and finishing: The fabric is sequentially subjected to pre-treatment, pre-setting, alkali reduction, dyeing, soaping and color fixing, and setting to obtain the bio-based hole cloth fabric.

[0012] Preferably, the preparation method of bio-based spandex is as follows:

[0013] (1) Prepolymerization: Add the bio-based polyol to the solvent and add the diisocyanate compound under stirring for prepolymerization;

[0014] (2) Chain extension, end-capping and aging: adding a chain extender to the prepolymer system for chain extension, and then adding an end-capping agent for end-capping; and aging after the end-capping is completed;

[0015] (3) Spinning: The matured solution is spun through discharge, spraying, stretching, false twisting, and oiling operations to obtain bio-based spandex.

[0016] Preferably, the preparation method of bio-based polyol is:

[0017] Under nitrogen protection, linolenic acid, trimethylolpropionic acid, phthalic anhydride and neopentyl glycol are mixed, xylene and hypophosphorous acid are added, and the reaction is heated until the acid value of the system is ≤5 mg KOH / g, and the reaction is stopped to obtain a bio-based polyol.

[0018] Preferably, the added mass ratio of linolenic acid, trimethylolpropionic acid, phthalic anhydride, neopentyl glycol, xylene and hypophosphorous acid is (180-250):(70-120):(65-100):(5-15):(25-40):(0.5-1.5);

[0019] The heating method is: heating to 130-180°C and then keeping the temperature constant for 0.6-1.2h. After oil and water separation, heating to 200-250°C at a heating rate of 0.5-1°C / min, and reacting at the constant temperature until the acid value of the system is ≤5mg KOH / g, and then stopping the reaction.

[0020] Preferably, the mass ratio of the bio-based polyol and the diisocyanate compound is (3-10):1; the prepolymerization conditions are: 50-55°C, 4-5h;

[0021] The chain extender is lysine and the end-capping agent is amino acid;

[0022] The molar ratios of lysine, amino acid and diisocyanate compound are 1:(1.8-2.1) and (0.1-0.2):2 respectively.

[0023] Preferably, the chain extension conditions are: 50-55°C, 2-4h;

[0024] The end-capping conditions are: 50-55°C, 3-5h;

[0025] The aging conditions are as follows: adding 3-8 wt% of the bio-based polyol mass of silane-modified cellulose nanofiber suspension to the end-capped system, and stirring at 35-40° C. for 20-48 hours.

[0026] Preferably, the specific preparation method of the silane-modified cellulose nanofiber suspension is to mix the silane coupling agent, alcohol solution and water, then add the cellulose nanofibers, stir them thoroughly and heat them for reaction, and after the reaction is completed, wash and remove the unreacted silane coupling agent.

[0027] Preferably, the alcohol liquid is methanol or ethanol; and the volume ratio of the alcohol liquid to water is (3-5):1;

[0028] The silane coupling agent is any one of γ-aminopropyltriethoxysilane and γ-(2,3-epoxypropyloxy)propyltrimethoxysilane, and the mass ratio of the silane coupling agent to the cellulose nanofiber is (1.5-2):1.

[0029] Preferably, the heating reaction conditions are: 80-95°C, 3-5h.

[0030] Preferably, the conditions for alkali reduction are: sodium hydroxide alkali solution with a mass concentration of 20-40%, an amount of 20-40% of the fabric mass, a temperature of 80-100°C, and 0.5-1.5h; after alkali reduction, washing with 60-80°C water to remove the alkali solution, and then neutralizing with acetic acid to a pH of 6.5-7.5.

[0031] Preferably, the dyeing conditions are:

[0032] Dye solution: dye 3-8wt%, slip agent 0.5-2g / L, leveling agent 0.5-1.5g / L, softener 1-3g / L, the balance is water; pH 4-6, bath ratio 1:20;

[0033] Add dye, slip agent, leveling agent and softener to 35-60℃ water, heat to 130℃ at a rate of 0.5-1.5℃ / min, and keep warm for 0.2-1h.

[0034] The beneficial effects of the present invention are:

[0035] 1. Using bio-based spandex and bio-based nylon 56 as the main materials reduces dependence on fossil fuels, has good sustainability and environmental protection, reduces the impact on the environment, and meets the environmental protection requirements of modern society;

[0036] 2. Bio-based spandex contains long-chain fatty acid chains, which can effectively improve the hydrophobicity of the product; at the same time, silane-modified cellulose nanofibers can improve the dispersion effect of cellulose nanofibers, and the evenly dispersed silane-modified cellulose nanofibers can also improve the breaking strength and breaking elongation of bio-based spandex, which can effectively improve product performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a fabric organization diagram;

[0038] Figure 2 It is the dyeing process curve diagram;

[0039] Figure 3 This is the finished product rendering. DETAILED DESCRIPTION

[0040] Example 1

[0041] This embodiment provides a method for preparing a bio-based hole cloth fabric, comprising the following steps:

[0042] 1. Preparation of bio-based spandex

[0043] 50g of γ-aminopropyltriethoxysilane was dispersed in a mixed solution of ethanol and water (the volume ratio of ethanol to water was 4:1), and then 25g of cellulose nanofibers were added. After sufficient stirring (mechanical stirring for 1h, then magnetic stirring for 2h), the mixture was reacted at 90°C for 4h. After the reaction, the unreacted silane coupling agent was removed by washing with anhydrous ethanol to obtain a silane-modified cellulose nanofiber suspension.

[0044] Under nitrogen protection, 205g α-linolenic acid (biomass source is seed food), 93.2g trimethylolpropionic acid, 87.2g phthalic anhydride and 12g neopentyl glycol were mixed and mechanically stirred, and then 30g xylene and 1g hypophosphorous acid were added, and then the temperature was raised to 155°C and kept constant for 1h; after the constant temperature, the oil and water were separated, and then the temperature was raised to 230°C at 0.5°C / min, and the reaction was kept constant, and the acid value was measured every 1h. When the acid value of the system (the acid value determination is a prior art and will not be repeated here) is ≤5mg KOH / g, the reaction was terminated to obtain bio-based polyols. The synthesis route is as follows:

[0045]

[0046] 1250g of bio-based polyol was added to N,N-dimethylacetamide from which water and impurities were removed to prepare a solution with a mass concentration of 25%, and 250g of diphenylmethane diisocyanate was added under stirring, and prepolymerized at 50°C for 4h; 73g of lysine was added to the prepolymerization system, chain extended at 50°C for 3h, and then 4.5g of glycine was added, and end-capped at 50°C for 3h; 62.5g of silane-modified cellulose nanofiber suspension was added to the system after end-capping, and stirred at 40°C for 24h to achieve maturation.

[0047] The matured bio-based spinning stock solution is transported to the spinning channel by a high-precision metering pump, discharged through a spinneret with a pore size of 0.3 mm and a temperature of 45°C, stretched by a roller at a stretching ratio of 5 times in the channel, and then false-twisted by a false twister at 3000 rpm, and finally oiled by an oiling device (the amount of oil applied is 2% of the fiber mass) to obtain bio-based spandex.

[0048] 2. Weaving

[0049] (1) Yarn preparation

[0050] Yarn 1: 70D / 68F FD DTY light mesh bio-based nylon 56;

[0051] Yarn 2: 40D bio-based spandex;

[0052] Yarn three: 75D / 36F FDY polyester alkali fused yarn.

[0053] 70D / 68F FD DTY light net bio-based nylon 56 was wrapped with 40D bio-based spandex to obtain nylon spandex covered yarn, which was used as warp yarn A and weft yarn A; 75D / 36F FDY polyester alkali-fused yarn was wrapped with 40D bio-based spandex to obtain alkali-fused spandex covered yarn, which was used as warp yarn B and weft yarn B. The yarn wrapping parameters of both yarns were 2.5 times draft multiple, 8 twists and Z twist direction.

[0054] (2) Organizational structure

[0055] The design is a plain weave, with the warp yarn A and warp yarn B arranged in a ratio of 10:2, and the weft yarn A and weft yarn B arranged in a ratio of 10:2, forming a checkered style. The warp and weft yarns have many interlacing points in the fabric, making the fabric crisp and strong. It has better wear resistance and higher strength than other fabrics of the same specification, and the fabric surface is even and the front and back sides are the same. The organization diagram of the plain weave is as follows Figure 1 shown.

[0056] The single width of the grey cloth on the machine is 97 inches, the warp density on the machine is 76 strands / inch, and the weft density on the machine is 72 strands / inch.

[0057] (3) Warping and sizing

[0058] The warping machine used is Tsudakoma TW30F. The warping tension is set to 18g, the warping speed is controlled at 380m / min, and the winding density is maintained at 0.46g / cm 3 The Shore hardness of the warp beam is maintained at 73 degrees, and the warping ends are 737 and 10 in total.

[0059] In order to facilitate the slurry to penetrate into the fibers and stick each single fiber, a slurry formula mainly composed of polypropylene is used. The main sizing process parameters are designed as follows: sizing machine speed 225r / min, delivery tension 20kg, winding tension 25kg, slurry concentration 7.8%, sizing rate 5%, oven temperature is uniformly 150℃, cylinder temperatures are 150, 145, 140, 135, 130℃ respectively, draft is set to 0.3%, immersion roller pressure is 3.7kg, and squeezing roller pressure is 3.2kg, so as to smoothly ensure the completion of the subsequent process tasks.

[0060] The beaming is to combine multiple sizing beams after warp beam sizing and wind them onto the weaving beam at the same time, so that the weaving beam reaches the total number of warps and width of the fabric for weaving on the loom. It is also the last process of weaving beam preparation. The beaming machine selected for this process is Tsudakoma TBF30, and the main process parameters are as follows: speed 75r / min, delivery tension 33kg, winding tension 39kg, cone scale 8, weaving beam Shore hardness 78 degrees.

[0061] (4) Adjusting the weaving machine

[0062] Weaving was carried out using the Japanese Tsudakoma jet equipment ZAX-N, and the process route of early shedding, high tension, and high back beam was adopted. The specific process parameters are as follows: weaving speed 430r / min, back beam height +2, shedding time 290°, due to the use of plain weave and large weft density, the heald flat time was set at 290° to facilitate the tightening of the weft yarn. In order to form a clear shed, the upper machine tension was set to 4500N.

[0063] 3. Dyeing and finishing

[0064] After the weaving process, a grey cloth with a checkered structure can be obtained. The checkered edge is matched with polyester alkali-soluble silk coated with bio-based spandex. During the pre-dyeing and finishing process, an alkali reduction process is added to melt the polyester alkali-soluble silk at the checkered edge line, retaining the bio-based spandex to form a regular hollow style, so that the fabric presents a "hole cloth" effect, increasing the breathability of the product and expanding the market for its application in summer sun protection clothing.

[0065] (1) Pretreatment

[0066] The BO machine is used for the pre-treatment processes of fabric desizing, scouring, bleaching, etc. Its working principle is to remove impurities, sizing agents and pigments from the fabric under the action of chemical agents through a series of unit operations such as impregnation, squeezing, and boiling, providing a good foundation for the subsequent dyeing process.

[0067] In the pre-treatment process, the temperature is set to 90°C, the vehicle speed is 50m / min, and the specific treatment liquid is as follows:

[0068]

[0069] (2) Pre-order type

[0070] Presetting can eliminate the internal stress generated in the weaving process, stabilize the fabric size, improve the feel and appearance of the fabric, and prevent wrinkles and deformation during subsequent processing. The presetting temperature is controlled at 180°C, and the speed is set at 30m / min, with an overfeed of 20% positive overfeed.

[0071] (3) Alkali reduction

[0072] For the alkali reduction process of polyester alkali-fused yarn, the temperature is controlled at 100°C. At this temperature, the activity of the fiber molecular chain segments is enhanced, which is conducive to the hydrolysis of the ester bond between the alkali solution and the fiber surface. As the reaction time lasts from 40 minutes to 60 minutes, the fiber and the alkali solution are fully contacted and reacted. Taking advantage of the alkali resistance of polyester alkali-soluble yarn, the polyester alkali-soluble yarn is dissolved, leaving the coated bio-based spandex to form a hole effect. 30% liquid alkali is used and its dosage is 30% of the cloth weight. After alkali reduction, it is fully washed with 70°C clean water to remove the alkali solution, and then neutralized with dilute acetic acid to a pH value of 7 to ensure uniform neutralization and ensure the chemical stability of the fabric and subsequent processing performance.

[0073] (4) Dyeing

[0074] Add acid leveling agent and acid dye into the dye vat, adjust the pH value of dyeing, heat up to the set value at a certain rate and keep it warm, then cool down to the set temperature, keep it warm for a certain period of time, add the fixing agent for color fixing treatment, drain the liquid, wash with water and then take out the cloth.

[0075] Acid dyes are used, the dye is acid blue 2RN, and the mixed leveling agent is composed of a slip agent, a high temperature leveling agent MDL02, and a bath softener YC-165. When the amount of dye is 5.24wt%, the balance is water, the slip agent is 1g / L, the high temperature leveling agent MDL02 is 0.8g / L, and the bath softener YC-165 is 2g / L, the dye and the slip agent, the high temperature leveling agent MDL02, and the bath softener YC-165 are added at 50°C (the slip agent, the high temperature leveling agent and the bath softener are added at Figure 2 The temperature is raised by 0.8℃ per minute, slowly raised to the dyeing temperature of 130℃, and kept warm for 30 minutes. The pH of the dye solution is 4.5, and the bath ratio is 1:20. The dyeing process curve is shown in Figure 2 shown.

[0076] (5) Soaping and color fixing

[0077] Soap washing refers to a process in which detergent is used to fully wash away the dyes that are not firmly bound to the fibers and remove floating colors after the fabric is dyed. Soap washing can improve the color fastness of the finished product. The temperature of the dyeing water is cooled to 45°C, the pH value of the dyeing water is adjusted to 4.0, and the acidic reducing agent M-270 is added. The mass ratio of the acidic reducing agent M-270 to the dyeing water is 1:20.

[0078] (6) Finalization

[0079] After the soaping and color fixing process, the wet cloth is dried to facilitate the completion of the following process. The so-called setting process refers to the width setting and overfeeding setting. During the process, antistatic agent and softener are added to the setting machine, the temperature is controlled at 185℃, and the speed is set to 30m / min, and the overfeed is 18% positive overfeed. The specific treatment liquid formula is as follows:

[0080]

[0081] After the dyeing and finishing process, the fabric is rolled out of the vat and finally a bio-based four-sided stretch hole fabric with soft and delicate hand feeling, four-sided stretch, breathable and sun-proof functions is obtained. Figure 3 shown.

[0082] The undisclosed parts in the above steps are all conventional operating methods in the art and will not be further described.

[0083] Tested according to the national standard GB / T18830-2009, this fabric does not have any anti-UV finishing, and its anti-UV UPF value is 118.32, which is greater than 50, and its UVA value is only 0.8, which has excellent anti-UV performance.

[0084] The elastic recovery is tested according to the FZ / T 01034-2008 standard, with a warp elastic recovery rate of 95.9% and a weft elastic recovery rate of 90%. The warp plastic deformation rate is 2.0% and the weft plastic deformation rate is 3.0%. Therefore, this fabric has good elasticity and elastic recovery, is comfortable to wear, has good stretchability during exercise, and the garment is not easily deformed.

[0085] According to the air permeability test of textiles, the air permeability of this fabric is 214.38mm / s. It has good air permeability and is comfortable to wear, making it suitable for summer sun protection clothing.

[0086] Comparative Example 1

[0087] The method is basically the same as Example 1, except that in Example 1, no silane-modified cellulose nanofiber suspension is added during the aging process.

[0088] Comparative Example 2

[0089] The method is basically the same as Example 1, except that in Comparative Example 2, a cellulose nanofiber suspension that is not modified with silane is added during the aging process.

[0090] The bio-based spandex samples prepared in Example 1 and Comparative Examples 1-2 were tested according to standards FZ / T 50006-2013 (test method for tensile properties of spandex fibers) and FZ / T 50007-2012 (test method for elasticity of spandex yarns). The results are shown in Table 1.

[0091] Table 1

[0092] sample Denier Breaking strength(cN) Elongation at break (%) Strength at 300% elongation (cN) Example 1 40D 132 435 47.5 Comparative Example 1 40D 87 256 20.2 Comparative Example 2 40D 103 345 30.4

[0093] It can be seen from Table 1 that the bio-based spandex in Example 1 has significantly improved breaking strength, breaking elongation and strength at 300% elongation compared with the bio-based spandex in Comparative Examples 1-2. The reason is that the addition of cellulose nanofibers can improve the internal structure of the fibers, so that they can better disperse stress when subjected to external forces, thereby effectively improving the mechanical properties of the bio-based spandex; and the silane-modified cellulose nanofibers have excellent dispersion effects in bio-based spinning solution. Compared with unmodified silane-modified cellulose nanofibers, their uniform dispersion in the bio-based spandex promotes the improvement of mechanical properties.

[0094] The above is only a preferred implementation of the patent of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the patent of the present invention. These improvements and modifications should also be regarded as the scope of protection of the patent of the present invention.

Claims

1. A method for preparing a bio-based hole cloth fabric, characterized in that: The steps include: S1. Yarn selection: nylon-spandex coated yarn obtained by coating bio-based nylon with bio-based spandex is used as warp yarn A and weft yarn A, and alkali-fused spandex coated yarn obtained by coating bio-based spandex with alkali-fused yarn is used as warp yarn B and weft yarn B; S2, weaving: using the selected yarn and weaving according to the design requirements to obtain the fabric; S3. Dyeing and finishing: The fabric is sequentially subjected to pre-treatment, pre-setting, alkali reduction, dyeing, soaping and color fixing, and setting to obtain the bio-based hole cloth fabric.

2. The method for preparing the bio-based hole cloth fabric according to claim 1, characterized in that: The preparation method of bio-based spandex is as follows: (1) Prepolymerization: Add the bio-based polyol to the solvent and add the diisocyanate compound under stirring for prepolymerization; (2) Chain extension, end-capping and aging: adding a chain extender to the prepolymer system for chain extension, and then adding an end-capping agent for end-capping; and aging after the end-capping is completed; (3) Spinning: The matured solution is spun through discharge, spraying, stretching, false twisting, and oiling operations to obtain bio-based spandex.

3. The method for preparing the bio-based hole cloth fabric according to claim 2, characterized in that: The preparation method of bio-based polyols is: Under nitrogen protection, linolenic acid, trimethylolpropionic acid, phthalic anhydride and neopentyl glycol are mixed, xylene and hypophosphorous acid are added, and the reaction is heated until the acid value of the system is ≤5 mg KOH / g, and the reaction is stopped to obtain a bio-based polyol.

4. The method for preparing the bio-based hole cloth fabric according to claim 3, characterized in that: The mass ratio of linolenic acid, trimethylolpropionic acid, phthalic anhydride, neopentyl glycol, xylene and hypophosphorous acid is (180-250):(70-120): (65-100):(5-15):(25-40):(0.5-1.5)； The heating method is: heating to 130-180°C and then keeping the temperature constant for 0.6-1.2h. After oil and water separation, heating to 200-250°C at a heating rate of 0.5-1°C / min, and reacting at the constant temperature until the acid value of the system is ≤5mg KOH / g, and then stopping the reaction.

5. The method for preparing the bio-based hole cloth fabric according to claim 2, characterized in that: The added mass ratio of bio-based polyol and diisocyanate compound is (3-10):1; The prepolymerization conditions are: 50-55°C, 4-5h; The chain extender is lysine, and the end-capping agent is amino acid; and the molar ratios of lysine, amino acid and diisocyanate compound are 1:(1.8-2.1), (0.1-0.2):2 respectively; The conditions for chain extension are: 50-55°C, 2-4h; the conditions for end-capping are: 50-55°C, 3-5h; The aging conditions are as follows: adding 3-8 wt% of the bio-based polyol mass of silane-modified cellulose nanofiber suspension to the end-capped system, and stirring at 35-40° C. for 20-48 hours.

6. The method for preparing the bio-based hole cloth fabric according to claim 5, characterized in that: The specific preparation method of the silane-modified cellulose nanofiber suspension is: mixing the silane coupling agent, alcohol solution and water, then adding the cellulose nanofibers, stirring them fully and heating them for reaction, and washing and removing the unreacted silane coupling agent after the reaction is completed.

7. The method for preparing the bio-based hole cloth fabric according to claim 6, characterized in that: The alcohol liquid is methanol or ethanol; The volume ratio of alcohol solution to water is (3-5):1; The silane coupling agent is any one of γ-aminopropyltriethoxysilane and γ-(2,3-epoxypropyloxy)propyltrimethoxysilane, and the mass ratio of the silane coupling agent to the cellulose nanofiber is (1.5-2):

1.

8. The method for preparing the bio-based hole cloth fabric according to claim 6, characterized in that: The heating reaction conditions are: 80-95°C, 3-5h.

9. The method for preparing the bio-based hole cloth fabric according to claim 1, characterized in that: The conditions for alkali reduction are: sodium hydroxide alkali solution with a mass concentration of 20-40%, an amount of 20-40% of the fabric mass, a temperature of 80-100°C, and 0.5-1.5h; After alkali reduction, wash with 60-80℃ water to remove the alkali solution, and then neutralize with acetic acid to pH 6.5-7.

5.

10. The method for preparing the bio-based hole cloth fabric according to claim 1, characterized in that: The dyeing conditions are: Dye solution: dye 3-8wt%, slip agent 0.5-2g / L, leveling agent 0.5-1.5g / L, softener 1-3g / L, the balance is water; pH 4-6, bath ratio 1:20; Add dye, slip agent, leveling agent and softener to 35-60℃ water, heat to 130℃ at a rate of 0.5-1.5℃ / min, and keep warm for 0.2-1h.

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