Antistatic, lightweight and down-proof fabric and preparation process thereof

Abstract

The invention relates to the technical field of down fabrics, in particular to an antistatic light-weight down-proof fabric and a preparation process thereof, and the preparation process comprises the following steps: weaving chinlon yarns and conductive filaments to form a fabric; sequentially performing dyeing and after-finishing to obtain the fabric. According to the invention, by selecting the superfine 10D chinlon yarns, adding the conductive silk fibers in the weaving process and carrying out after-finishing and calendaring, the fabric has down-proof, antistatic and extremely light-weight effects, is suitable for being applied to ultralight down jackets, and can cover a temperature zone of-10 DEG C to 5 DEG C.

Description

Technical Field

[0001] The present invention relates to the technical field of down fabrics, and specifically to an antistatic, lightweight, and down-proof fabric and its preparation process. Background Art

[0002] Down belongs to natural protein fiber and has characteristics such as lightness, thinness, and warmth. It is one of the best natural raw materials for warmth retention and is deeply favored by consumers. Down jackets with good warmth retention performance are widely recognized by consumers in winter and have become essential items in winter clothing. However, most of the current clothing on the market is relatively bulky and heavy, lacking good wearing comfort. In addition, down fabrics are mostly woven from nylon yarns. Nylon has poor hygroscopicity and is prone to generating static electricity when rubbed, affecting people's wearing comfort. Therefore, we propose an antistatic, lightweight, and down-proof fabric and its preparation process. Summary of the Invention

[0003] The purpose of the present invention is to provide an antistatic, lightweight, and down-proof fabric and its preparation process to solve the problems raised in the above background art.

[0004] To solve the above technical problems, the present invention provides the following technical solutions:

[0005] A preparation process for an antistatic, lightweight, and down-proof fabric includes the following processes: weaving with nylon yarns and conductive filaments to form a fabric; successively performing dyeing and post-finishing to obtain the fabric.

[0006] Further, the fabric is in plain weave, the yarn count specification is 10D*10D+20D; the gram weight is 26-35 g / ㎡; the total density ≥ 550 TY.

[0007] Further, the warp yarn of the fabric is nylon yarn.

[0008] Further, the weft yarn of the fabric includes nylon yarns and conductive filaments arranged at equal intervals, and the quantity ratio of nylon yarns to conductive filaments is (2-8):1.

[0009] Further, the single-filament linear density of the nylon yarn is 10D; the linear density of the conductive filament is 20D.

[0010] In the above technical solution, the fabric is woven from ultrafine denier 10D nylon material, giving it a super lightweight feel. For the fabric made of ultrafine fibers, the spacing between the fibers is narrow, increasing the collision and friction between the fibers themselves, increasing the probability of water molecules colliding and rubbing against each other, weakening the Brownian motion of water molecules inside the yarn, resulting in the aggregation of water molecules, and making the inside of the yarn wetter, which helps to improve the conductivity of the fabric. In this application, conductive wires are added in the weft direction of the fabric, with one conductive wire added every few weft yarns, arranged at equal intervals, which can effectively improve the fabric's ability to eliminate and prevent static electricity, and its specific resistance value is persistent and not affected by humidity. The fabric has a relatively high total density, and its tissue design can enhance the strength performance and water repellency of the fabric.

[0011] Further, the dyeing process is as follows: Use a beam dyeing machine with a liquor ratio of 1:20;

[0012] Heat up to 35 - 40 °C, add acid dyes and additives, adjust the pH value of the system to 3 - 4, and keep it warm and circulate for 10 - 20 minutes;

[0013] With a heating rate of 1.0 - 1.5 °C / min, heat up to 58 - 62 °C, and keep it warm and circulate for 280 - 320 minutes;

[0014] With a heating rate of 0.5 - 0.8 °C / min, heat up to 78 - 82 °C, and keep it warm and circulate for 280 - 320 minutes;

[0015] With a heating rate of 0.5 - 0.8 °C / min, heat up to 98 - 100 °C, and keep it warm and circulate for 60 minutes;

[0016] With a cooling rate of 1 °C / min, cool down to 78 - 82 °C, drain the liquid, wash with water, and set the shape.

[0017] Further, the process conditions for setting the shape are: temperature 160 - 165 °C, vehicle speed 40 - 45 m / min, and 3% overfeed of the effective width.

[0018] Further, the additives include one or a mixture of leveling agents, chelating dispersants, penetrants, etc.;

[0019] Use glacial acetic acid to adjust the pH of the system.

[0020] Further, the dosage of acid dyes is 20 - 150 g / L;

[0021] The dosage of leveling agent is 0.5 - 2.0 g / L.

[0022] In the above technical solution, a beam dyeing machine is used to dye the fabric with acid dyes. After dyeing, the liquid is drained and the fabric is washed, which can make the fibers in the fabric more fluffy and shrink naturally, improving the hand feeling of the fabric and enhancing its anti-feather leakage effect. After dyeing, heat setting is carried out to keep the nylon having a certain resilience, which is beneficial to the improvement of the hand feeling of the fabric.

[0023] Further, the post-finishing is reverse nylon calendering, and the specific process is as follows: Using a nylon roller, calendering is carried out 3 - 4 times under the conditions of a calendering temperature of 165 - 172 °C, a pressure of 180 - 200 N / mm, and a vehicle speed of 20 - 25 m / min; then cold pressing and post-setting are carried out.

[0024] Further, the process conditions for cold pressing are: a temperature of 35 - 45 °C, a pressure of 150 - 155 N / mm, and a vehicle speed of 30 - 40 m / min.

[0025] Further, the process conditions for post-setting are: 150 - 155 °C, and a vehicle speed of 20 - 30 m / min.

[0026] In the above technical solution, for the fabric after heat setting, the surface fibers are fluffy, and there are pores between the fibers, which easily allows the down to drill out and also forms diffuse reflection, affecting the gloss of the fabric. By using the calendering process and taking advantage of the plasticity of the fibers, the fabric is rolled, the yarns in the fabric are flattened, the fluffy villi of the fibers are laid down, filling the gaps between the fibers, closing the warp and weft gaps, making the structure of the fabric more compact, promoting its surface to be flat and smooth, improving the gloss of the fabric while enhancing its anti-feather leakage and water-repellent capabilities. Then cold pressing is carried out to adjust the hand feeling of the fabric; post-setting is carried out to stabilize the shrinkage rate and style.

[0027] Further, before the post-finishing process, a coating is set on the surface of the fabric obtained after dyeing, and the specific process is as follows:

[0028] Using a floating knife coating machine, a water-based sizing material is coated on the surface of the fabric to be calendered, and then baked to form a coating.

[0029] Further, the coating temperature is 110 - 130 °C, and the sizing amount of the water-based sizing material is 5 - 10 g / m².

[0030] Further, the baking process is: a temperature of 150 - 160 °C, and a duration of 90 - 120 s.

[0031] Further, the water-based sizing material includes the following mass components: 30 - 100 g / L of polyamide, 0.5 - 2.5 g / L of cross-linking agent, and 1 - 3 g / L of blocked isocyanate, and the pH is 6 - 9.

[0032] Further, the cross-linking agent is one or a mixture of more of tromethamine, diethylene glycol bis(3-aminopropyl) ether (DEA), and propylene oxide.

[0033] In the above technical solution, the fibers of the fabric obtained after post-treatment are extremely fine. The rolling in the calendering process causes the deformation of the fibers to be insufficient to fully fill the fiber pores, and the improvement of the performance of the fabric such as anti-feather leakage and water repellency is not obvious. Therefore, the fabric is coated before the post-treatment process, a coating is set, and it is made to fill the fiber pores of the fabric.

[0034] Furthermore, the polyamide is prepared by the following process:

[0035] Mix the carboxyl-terminal chitosan and amino-terminal polysiloxane, heat to 120 - 130 °C under nitrogen protection, stir for 60 - 90 min, add a catalyst, heat to 240 - 250 °C, and react at a vacuum degree of -0.1 MPa for 3 - 4 h; release the vacuum, cool and discharge the material, and cool to obtain the polyamide.

[0036] Furthermore, the mass ratio of the carboxyl-terminal chitosan to the amino-terminal polysiloxane is (2.9 - 3.7):1;

[0037] Amino-terminal polysiloxane: Bis(3-aminopropyl) terminated polydimethylsiloxane, CHEERSIL 8110, sourced from Suzhou Qitian New Materials Co., Ltd.;

[0038] The catalyst is sodium hypophosphite, and the dosage is 3% - 4% of the total mass of the carboxyl-terminal chitosan and the amino-terminal polysiloxane.

[0039] Furthermore, the carboxyl-terminal chitosan is prepared by the following process:

[0040] Mix chitosan, tetracarboxylic acid compound, EDC and NHS in an ethanol solution, adjust the pH of the system to 3.5 - 3.8, stir and react at a temperature of 35 °C - 42 °C for 72 - 84 h; dialyze and dry to obtain the carboxyl-terminal chitosan.

[0041] Furthermore, the mass ratio of chitosan to the tetracarboxylic acid compound is (11.2 - 14.0):10;

[0042] The mass ratio of the tetracarboxylic acid compound to EDC (1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride) and NHS (N-hydroxysuccinimide) is 10:(2.9 - 3.2):(1.8 - 2.0);

[0043] The ratio of chitosan to the ethanol solution is 200 mg / 100 mL;

[0044] The concentration of the ethanol solution is 50 - 75 wt%.

[0045] Furthermore, the tetracarboxylic acid compound is prepared by the following process:

[0046] Under nitrogen protection, 1,4,5,8-naphthalenetetracarboxylic dianhydride and polyetheramine were mixed in absolute ethanol, and the temperature was raised to 80-85 °C, and the mixture was refluxed for 100-150 min; rotary evaporation was carried out to obtain a diamine compound;

[0047] Under nitrogen protection, the diamine compound and absolute ethanol were mixed, stirred and methyl acrylate was added, and the reaction was carried out in the dark for 21-24 h; rotary evaporation was carried out to obtain an end-ester group compound;

[0048] The end-ester group compound and an ethanol solution were mixed, the pH of the system was adjusted to 2.0, and the reaction was stirred at 35-42 °C for 72-84 h; rotary evaporation was carried out, deionized water was added, and extraction was carried out with chloroform, and drying was carried out to obtain a tetracarboxylic acid compound.

[0049] Furthermore, the molar ratio of 1,4,5,8-naphthalenetetracarboxylic dianhydride to polyetheramine is 1:(2.0-2.1);

[0050] The ratio of 1,4,5,8-naphthalenetetracarboxylic dianhydride to ethanol is 20 g / 100 mL;

[0051] The polyetheramine is polyetheramine ED600, which is sourced from Huntsman Corporation.

[0052] Furthermore, the mass ratio of the diamine compound to methyl acrylate is 10:(3.6-4.8);

[0053] The ratio of the diamine compound to ethanol is 5 g / 100 mL.

[0054] Furthermore, the ratio of the end-ester group compound to the ethanol solution is 2 g / 100 mL;

[0055] The concentration of the ethanol solution is 50-75 wt%.

[0056] In the above technical scheme, the water-based sizing material is composed of polyamide, a cross-linking agent and a blocked water-based isocyanate. Polyamide has a similar structure to nylon, and can co-crystallize and eutectic during the calendering process, so that the bonding force between the coating and the fabric is better, and the durability of the coating effect is improved. After the water-based sizing material is coated, under the action of temperature, the blocked isocyanate group is unblocked, so that it reacts with polyamide and the cross-linking agent to form a cross-linked network, which can form a waterproof and breathable film on the surface of the fabric, which helps to further improve the water-repellent and anti-drilling performance of the coating. Calendering after the coating is formed also helps to improve the bonding between the coating and the fabric, and fill the gaps in the fabric fibers. Polyamide is obtained by reacting a modified chitosan containing a carboxyl group (the above-mentioned carboxyl-terminated chitosan) and an amino-terminated polysiloxane. The introduction of the chitosan structure helps to improve the film-forming property of the water-based sizing material, so that the coating has flexibility and has a good bond with the fabric, and the anti-drilling and water-repellent properties of the prepared coating are improved, thereby improving the durability of the coating. The polysiloxane segments in the structure help reduce friction between fibers, improve the softness and smoothness of the fabric, its water repellency, and its durability and comfort. Under the action of EDC and NHS, the amino groups in chitosan react with the carboxyl groups in the tetracarboxylic acid compound to form carboxyl-terminated chitosan. The tetracarboxylic acid compound is obtained by the reaction of 1,4,5,8-naphthalenetetracarboxylic anhydride with polyetheramine, and the resulting diamine reacts with methyl acrylate and hydrolyzes the ester group. Introducing polyether segments into polyamide molecular segments can increase hydrophilicity and improve the antistatic properties of the fabric. The polyamide molecular structure also contains naphthalene diamide, which has ultraviolet light absorption properties, can improve the coating's sensitivity to ultraviolet light and improve its durability.

[0057] Compared with the prior art, the present invention has the following beneficial effects:

[0058] The invention describes a preparation process for an antistatic, lightweight, anti-down fabric, which selects ultrafine 10D nylon yarn and adds conductive silk fiber during the weaving process, and then undergoes post-finishing and calendering to make the fabric have anti-down, antistatic and extremely lightweight effects. The fabric is suitable for use in ultralight down jackets, covering a temperature range of -10°C to 5°C. DETAILED DESCRIPTION

[0059] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] In the following specific implementations,

[0061] In the dyeing process, the acid dye can be Red B, Yellow R, Blue 3R, Black M of Yanliluo Guoxing Dyes. Yellow R is selected below, and the dosage is 60g / L; the leveling agent is M-2200T, and the usage is 1g / L; the pH is 4.0;

[0062] The single fiber linear density of nylon yarn is 10D, which comes from Zhejiang Jiahua Special Nylon Co., Ltd.

[0063] Conductive yarn: carbon fiber with a linear density of 20D, sourced from Haining Taierxin New Materials Co., Ltd.

[0064] Chitosan: Deacetylation degree 60%, sourced from Nantong Lvshen Bioengineering Co., Ltd.

[0065] Amino-terminated polysiloxane: bis(3-aminopropyl)-terminated polydimethylsiloxane, CHEERSIL 8110, from Suzhou Qitian New Materials Co., Ltd.;

[0066] The polyetheramine is polyetheramine ED600, which is sourced from Shanghai Huntsman Polyurethane Co., Ltd.;

[0067] Blocked isocyanate: BI201, from Shenzhen Yoshida Chemical Co., Ltd.

[0068] Embodiment 1: A preparation process of an antistatic, lightweight, anti-downfall fabric, comprising the following processes:

[0069] Step 1, weaving: take nylon yarn and conductive yarn to weave, forming a fabric with a gram weight of 31g / ㎡ (plain weave, 10D*10D+20D), a total density of 560TY, the warp yarn of the fabric is nylon yarn; the weft yarn of the fabric includes nylon yarn and conductive yarns arranged at equal intervals, and the ratio of nylon yarn to conductive yarn is 5:1;

[0070] Step 2, dyeing, the process is as follows: use a warp dyeing machine, bath ratio 1:20; heat to 35 ° C, add acid dyes and auxiliaries, use glacial acetic acid to adjust the system pH value to 3, keep warm and circulate for 10 minutes; heat to 58 ° C at a heating rate of 1.0 ° C / min, keep warm and circulate for 280 minutes; heat to 78 ° C at a heating rate of 0.5 ° C / min, keep warm and circulate for 280 minutes; heat to 98 ° C at a heating rate of 0.5 ° C / min, keep warm and circulate for 60 minutes; cool to 78 ° C at a cooling rate of 1 ° C / min, drain, wash, and set. The process conditions for setting are: temperature 160 ° C, speed 40 m / min, effective width × 3% overfeed;

[0071] Step 3: Set the coating. The process is as follows:

[0072] Using a floating knife coater, coat the water-based sizing material on the surface of the fabric to be calendered, with a coating temperature of 110°C and a sizing amount of 5 g / m of the water-based sizing material. 2 Bake at a temperature of 150°C for 120 s to form a coating.

[0073] The water-based sizing material includes the following mass components: 30 g / L of polyamide, 0.5 g / L of crosslinking agent tromethamine, and 1 g / L of blocked isocyanate, with a pH of 7.

[0074] The polyamide is prepared by the following process: Mix the carboxyl-terminated chitosan and amino-terminated polysiloxane, heat to 120°C under nitrogen protection, stir for 90 min, add 3% catalyst sodium hypophosphite, heat to 240°C, and react for 3 h under a vacuum of -0.1 MPa; release the vacuum, cool and discharge, and cool to obtain the polyamide; the mass ratio of carboxyl-terminated chitosan to amino-terminated polysiloxane is 2.9:1.

[0075] The carboxyl-terminated chitosan is prepared by the following process: Mix chitosan, tetracarboxylic acid compound, EDC, and NHS in an ethanol solution, adjust the pH of the system to 3.5, stir and react at 35°C for 72 h; dialyze and dry to obtain the carboxyl-terminated chitosan; the mass ratio of chitosan, tetracarboxylic acid compound, EDC, and NHS is 11.2:10:2.9:1.8; the ratio of chitosan to ethanol solution is 200 mg / 100 mL; the concentration of the ethanol solution is 75 wt%.

[0076] The tetracarboxylic acid compound is prepared by the following process: Under nitrogen protection, mix 1,4,5,8-naphthalenetetracarboxylic dianhydride and polyetheramine in anhydrous ethanol, heat to 80°C, and reflux for 100 min; rotary evaporate to obtain the diamine compound; the molar ratio of 1,4,5,8-naphthalenetetracarboxylic dianhydride to polyetheramine is 1:2.0; the ratio of 1,4,5,8-naphthalenetetracarboxylic dianhydride to ethanol is 20 g / 100 mL.

[0077] Under nitrogen protection, mix the diamine compound and anhydrous ethanol, stir and add methyl acrylate, and react in the dark for 21 h; rotary evaporate to obtain the ester-terminated compound; the mass ratio of the diamine compound to methyl acrylate is 10:3.6; the ratio of the diamine compound to ethanol is 5 g / 100 mL.

[0078] Mix the ester-terminated compound and the ethanol solution, adjust the pH of the system to 2.0, stir and react at 35°C for 72 h; rotary evaporate, add deionized water, extract with chloroform, and dry to obtain the tetracarboxylic acid compound; the ratio of the ester-terminated compound to the ethanol solution is 2 g / 100 mL; the concentration of the ethanol solution is 75 wt%.

[0079] Step 4. Post-treatment, the process is as follows: Use a nylon roller, calender 3 times under the conditions of calendering temperature of 165°C, pressure of 200 N / mm, and vehicle speed of 20 m / min; then perform cold pressing, and the process conditions for cold pressing are: temperature of 35°C, pressure of 155 N / mm, and vehicle speed of 30 m / min; then perform post-setting, and the process conditions for post-setting are: 150°C, vehicle speed of 20 m / min, to obtain the fabric.

[0080] Example 2: A preparation process for an antistatic, lightweight, and anti-feather-drilling fabric, including the following processes:

[0081] Step 1. Weaving: Take nylon yarn and conductive wire for weaving to form a fabric with a gram weight of 31 g / ㎡ (plain weave, 10D*10D + 20D), with a total density of 560 TY. The warp yarn of the fabric is nylon yarn; the weft yarn of the fabric includes nylon yarn and conductive wires arranged at equal intervals, and the quantity ratio of nylon yarn to conductive wire is 6:1;

[0082] Step 2. Dyeing, the process is as follows: Use a beam dyeing machine with a bath ratio of 1:20; heat up to 37°C, add acid dyes and auxiliaries, adjust the pH value of the system to 3.5 with glacial acetic acid, and keep warm and circulate for 15 min; at a heating rate of 1.2°C / min, heat up to 60°C, keep warm and circulate for 300 min; at a heating rate of 0.6°C / min, heat up to 80°C, keep warm and circulate for 300 min; at a heating rate of 0.6°C / min, heat up to 99°C, keep warm and circulate for 60 min; at a cooling rate of 1°C / min, cool down to 80°C, drain the liquid, wash with water, and perform setting. The process conditions for setting are: temperature of 162°C, vehicle speed of 42 m / min, and an effective width with 3% overfeed;

[0083] Step 3. Set the coating, the process is as follows:

[0084] Use a floating knife coating machine to coat the water-based sizing material on the surface of the fabric to be calendered. The coating temperature is 120°C, and the sizing amount of the water-based sizing material is 8 g / m2; bake at a temperature of 155°C for 105 s to form a coating;

[0085] The water-based sizing material includes the following mass components: 60 g / L of polyamide, 1.5 g / L of cross-linking agent diethylene glycol bis(3-aminopropyl) ether, and 2 g / L of blocked isocyanate, with a pH of 8;

[0086] The polyamide is prepared by the following process: Mix carboxyl-terminated chitosan and amino-terminated polysiloxane, under nitrogen protection, heat up to 125°C, stir for 75 min, add 3.5% catalyst sodium hypophosphite, heat up to 245°C, and react at a vacuum degree of -0.1 MPa for 3.5 h; release the vacuum, cool down and discharge the material, and cool to obtain the polyamide; the mass ratio of carboxyl-terminated chitosan to amino-terminated polysiloxane is 3.3:1;

[0087] The carboxyl-terminated chitosan is prepared by the following process: Chitosan, a tetracarboxylic acid compound, EDC, and NHS are mixed in an ethanol solution, and the pH of the system is adjusted to 3.6. Stir and react at 40 °C for 78 h; dialyze and dry to obtain carboxyl-terminated chitosan; the mass ratio of chitosan, the tetracarboxylic acid compound, EDC, and NHS is 12.36:10:3.0:1.9; the ratio of chitosan to the ethanol solution is 200 mg / 100 mL; the concentration of the ethanol solution is 60 wt%.

[0088] The tetracarboxylic acid compound is prepared by the following process: Under nitrogen protection, 1,4,5,8-naphthalenetetracarboxylic dianhydride and polyetheramine are mixed in absolute ethanol, heated to 82 °C, and refluxed for 120 min; rotary evaporate to obtain a diamine compound; the molar ratio of 1,4,5,8-naphthalenetetracarboxylic dianhydride to polyetheramine is 1:2.05; the ratio of 1,4,5,8-naphthalenetetracarboxylic dianhydride to ethanol is 20 g / 100 mL;

[0089] Under nitrogen protection, the diamine compound and absolute ethanol are mixed, stirred and methyl acrylate is added, and reacted in the dark for 22 h; rotary evaporate to obtain an ester-terminated compound; the mass ratio of the diamine compound to methyl acrylate is 10:3.2; the ratio of the diamine compound to ethanol is 5 g / 100 mL;

[0090] The ester-terminated compound and the ethanol solution are mixed, the pH of the system is adjusted to 2.0, and stirred and reacted at 40 °C for 78 h; rotary evaporate, add deionized water, extract with chloroform, and dry to obtain the tetracarboxylic acid compound; the ratio of the ester-terminated compound to the ethanol solution is 2 g / 100 mL; the concentration of the ethanol solution is 60 wt%.

[0091] Step 4, post-treatment, the process is as follows: Use a nylon roller, calender 4 times under the conditions of a calendering temperature of 170 °C, a pressure of 190 N / mm, and a vehicle speed of 22 m / min; then cold press, and the process conditions of the cold press are: a temperature of 40 °C, a pressure of 152 N / mm, and a vehicle speed of 5 m / min; post-set, and the process conditions of the post-set are: 152 °C, a vehicle speed of 25 m / min, to obtain the fabric.

[0092] Example 3: A preparation process for an antistatic, lightweight, and anti-feather leakage fabric, including the following processes:

[0093] Step 1, weaving: Take polyamide yarn and conductive wire for weaving to form a fabric with a gram weight of 31 g / ㎡ (plain weave, 10D*10D+20D), a total density of 560 TY, and the warp yarn of the fabric is polyamide yarn; the weft yarn of the fabric includes polyamide yarn and equally spaced conductive wires, and the quantity ratio of polyamide yarn to conductive wire is 8:1;

[0094] Step 2: Dyeing, the process is as follows: Use a beam dyeing machine with a bath ratio of 1:20; Heat up to 40°C, add acid dyes and auxiliaries, adjust the pH value of the system to 4 with glacial acetic acid, and keep it warm and circulate for 20 min; At a heating rate of 1.5°C / min, heat up to 62°C, and keep it warm and circulate for 320 min; At a heating rate of 0.8°C / min, heat up to 82°C, and keep it warm and circulate for 320 min; At a heating rate of 0.8°C / min, heat up to 100°C, and keep it warm and circulate for 60 min; At a cooling rate of 1°C / min, cool down to 82°C, drain the liquid, wash with water, and set the shape. The process conditions for setting the shape are: temperature 165°C, vehicle speed 45 m / min, effective width × 3% overfeed;

[0095] Step 3: Set the coating, the process is as follows:

[0096] Use a floating knife coater to coat the water-based sizing material on the surface of the fabric to be calendered. The coating temperature is 130°C, and the sizing amount of the water-based sizing material is 10 g / m²; Bake at a temperature of 160°C for 90 s to form a coating;

[0097] The water-based sizing material includes the following mass components: 100 g / L polyamide, 2.5 g / L cross-linking agent propylene oxide, and 3 g / L blocked isocyanate, with a pH of 9;

[0098] The polyamide is prepared by the following process: Mix carboxyl-terminal chitosan and amino-terminal polysiloxane, under nitrogen protection, heat up to 130°C, stir for 60 min, add 4% catalyst sodium hypophosphite, heat up to 250°C, and react under a vacuum of -0.1 MPa for 4 h; Release the vacuum, cool down and discharge the material, and cool to obtain polyamide; The mass ratio of carboxyl-terminal chitosan to amino-terminal polysiloxane is 3.7:1;

[0099] The carboxyl-terminal chitosan is prepared by the following process: Mix chitosan, tetracarboxylic acid compound, EDC, and NHS in an ethanol solution, adjust the pH of the system to 3.8, and stir and react at a temperature of 42°C for 84 h; Dialyze and dry to obtain carboxyl-terminal chitosan; The mass ratio of chitosan, tetracarboxylic acid compound, EDC, and NHS is 14.0:10:3.2:2.0; The ratio of chitosan to ethanol solution is 200 mg / 100 mL; The concentration of the ethanol solution is 50 wt%;

[0100] The tetracarboxylic acid compound is prepared by the following process: Under nitrogen protection, mix 1,4,5,8-naphthalenetetracarboxylic dianhydride and polyetheramine in absolute ethanol, heat up to 85°C, and reflux and react for 150 min; Rotate and evaporate to obtain a diamine compound; The molar ratio of 1,4,5,8-naphthalenetetracarboxylic dianhydride to polyetheramine is 1:2.1; The ratio of 1,4,5,8-naphthalenetetracarboxylic dianhydride to ethanol is 20 g / 100 mL;

[0101] Under nitrogen protection, a diamine compound and absolute ethanol were mixed, stirred, and methyl acrylate was added, followed by a light-shielded reaction for 24 h; rotary evaporation was carried out to obtain an end-ester group compound; the mass ratio of the diamine compound to methyl acrylate was 10:4.8; the ratio of the diamine compound to ethanol was 5 g / 100 mL;

[0102] The end-ester group compound and an ethanol solution were mixed, the pH of the system was adjusted to 2.0, and the mixture was stirred and reacted at 42 °C for 84 h; rotary evaporation was carried out, deionized water was added, and extraction was carried out using chloroform, followed by drying to obtain a tetracarboxylic acid compound; the ratio of the end-ester group compound to the ethanol solution was 2 g / 100 mL; the concentration of the ethanol solution was 50 wt%;

[0103] Step 4, post-treatment, the process was as follows: Using a nylon roller, calendering was carried out 4 times under the conditions of a calendering temperature of 172 °C, a pressure of 180 N / mm, and a vehicle speed of 25 m / min; then cold pressing was carried out, and the process conditions for cold pressing were: a temperature of 45 °C, a pressure of 150 N / mm, and a vehicle speed of 40 m / min; post-setting was carried out, and the process conditions for post-setting were: 155 °C, a vehicle speed of 30 m / min, to obtain the fabric.

[0104] Comparative Example 1: A preparation process for an antistatic, lightweight, and anti-feather leakage fabric, including the following processes:

[0105] Step 3, coating was set up, and the process was as follows:

[0106] Using a floating knife coater, an aqueous sizing agent was coated on the surface of the fabric to be calendered, the coating temperature was 110 °C, and the sizing amount of the aqueous sizing agent was 5 g / m 2 ; baking was carried out at a temperature of 150 °C for a duration of 120 s to form a coating; the aqueous sizing agent included the following mass components: 30 g / L polyamide, 0.5 g / L crosslinking agent tromethamine, and 1 g / L blocked isocyanate, and the pH was 7;

[0107] The polyamide was prepared by the following process: A carboxyl-terminated chitosan and an amino-terminated polysiloxane were mixed, under nitrogen protection, the temperature was raised to 120 °C, and the mixture was stirred for 90 min. Then, 3% catalyst sodium hypophosphite was added, the temperature was raised to 240 °C, and the reaction was carried out under a vacuum of -0.1 MPa for 3 h; the vacuum was released, the temperature was lowered and the product was discharged, and after cooling, the polyamide was obtained; the mass ratio of the carboxyl-terminated chitosan to the amino-terminated polysiloxane was 1.8:1;

[0108] The carboxyl-terminated chitosan was prepared by the following process: Chitosan, ethylenediaminetetrapropionic acid, EDC, and NHS were mixed in an ethanol solution, the pH of the system was adjusted to 3.5, and the mixture was stirred and reacted at 35 °C for 72 h; dialysis and drying were carried out to obtain the carboxyl-terminated chitosan; the mass ratio of chitosan, ethylenediaminetetrapropionic acid, EDC, and NHS was 56:10:2.9:1.8; the ratio of chitosan to the ethanol solution was 200 mg / 100 mL; the concentration of the ethanol solution was 75 wt%;

[0109] Steps 1-2, 4 are the same as those in Example 1 to obtain the fabric.

[0110] Comparative Example 2: A preparation process of an antistatic, lightweight, and anti-feather-down leakage fabric, including the following processes:

[0111] Step 3: Set the coating, and the process is as follows:

[0112] Use a floating knife coater to coat the water-based sizing material on the surface of the fabric to be calendered, with a coating temperature of 110°C and a sizing amount of the water-based sizing material of 5 g / m 2 ; Bake at a temperature of 150°C for 120 s to form a coating; the water-based sizing material includes the following mass components: 30 g / L of polyamide, 0.5 g / L of cross-linking agent tromethamine, and 1 g / L of blocked isocyanate, with a pH of 7;

[0113] The polyamide is prepared by the following process: Mix adipic acid, hexamethylenediamine, and polyetheramine, heat to 120°C under nitrogen protection, stir for 90 min, add 3% catalyst sodium hypophosphite, heat to 240°C, and react at a vacuum degree of -0.1 MPa for 3 h; release the vacuum, cool and discharge the material, and cool to obtain polyamide; the molar ratio of adipic acid, hexamethylenediamine, and polyetheramine is 5:1:4;

[0114] Steps 1-2, 4 are the same as those in Example 1 to obtain the fabric.

[0115] Comparative Example 3: A preparation process of an antistatic, lightweight, and anti-feather-down leakage fabric, including the following processes: Steps 1-3 are the same as Steps 1-2, 4 in Example 1 respectively to obtain the fabric.

[0116] Experiment: Take the fabrics obtained in Examples 1-3 and Comparative Examples 1-3 to prepare specimens, and detect and record the test results of their properties respectively:

[0117] Mechanical property test: Refer to GB / T 3923.1 as the reference standard to test the mechanical properties of the specimens;

[0118] Anti-feather-down leakage property: Refer to GB / T 14772-2011 as the reference standard to test the anti-feather-down leakage property of the specimens, with the filling material being goose down with a down content of 95%, repeat the experiment 5 times, and take the average value;

[0119] Antistatic property: Refer to GB / T 12703.2-2021 as the reference standard to detect the antistatic ability of the specimens, with its surface charge density as the test standard;

[0120] Water repellency test: Refer to GB / T 4745-2012 as the reference standard to detect the water repellency of the specimens;

[0121] Wash fastness performance test: The specimen was washed 30 times, and then the performance of the specimen was tested again. The washing conditions were: temperature 50°C, soap solution 4 g / L, time 45 min, bath ratio 1:10.

[0122] Anti-ultraviolet performance test: The specimen was irradiated under a 30 W ultraviolet lamp for 1000 h, and then the performance of the specimen was tested again. The distance between the ultraviolet light and the specimen was 100 mm.

[0123]

[0124] According to the data in the above table, the following conclusions can be clearly obtained:

[0125] The fabrics obtained in Examples 1-3 were compared with the fabrics obtained in Comparative Examples 1-3. The test results showed that:

[0126] Compared with the comparative examples, the fabrics obtained in Examples 1-3 had lower down leakage root numbers, surface charge density data, and higher breaking strength and water repellency grade data. This fully demonstrated that the present invention achieved an improvement in the antistatic, anti-down leakage, and water repellency properties of the fabricated fabrics.

[0127] Compared with Example 1, in step 3 of Comparative Example 1, the tetracarboxylic compound was replaced by ethylenediaminetetrapropionic acid; in step 3 of Comparative Example 2, the polyamide was prepared from adipic acid, hexamethylenediamine, and polyetheramine; in Comparative Example 3, no coating was set before post-finishing. For the fabrics obtained in Comparative Examples 1-3, their down leakage root numbers and surface charge density data increased, while their breaking strength and water repellency grade data decreased. It can be seen that the setting of the fabric preparation process and the components used in the present invention can promote the comprehensive improvement of its antistatic, anti-down leakage, and water repellency properties.

[0128] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0129] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A preparation process of an antistatic, lightweight, anti-downfall fabric, characterized in that: The process includes: weaving nylon yarn and conductive yarn to form a fabric; Dyeing and finishing are carried out in sequence to obtain the fabric.

2. The process for preparing the antistatic, lightweight, anti-downfall fabric according to claim 1, characterized in that: The fabric weight is 26-35g / ㎡; the total density is 550-650TY; The warp yarn of the fabric is nylon yarn; The weft yarns of the fabric include nylon yarns and conductive threads arranged at equal intervals, and the number ratio of the nylon yarns to the conductive threads is (2 to 8):

1.

3. The process for preparing the antistatic, lightweight, anti-downfall fabric according to claim 1, characterized in that: The dyeing process is as follows: using a warp dyeing machine with a bath ratio of 1:20; heating to 35-40°C, adding acid dyes and auxiliaries, adjusting the system pH value to 3-4, and keeping warm for 10-20 minutes; heating to 58-62°C at a heating rate of 1.0-1.5°C / min, and keeping warm for 280-320 minutes; heating to 78-82°C at a heating rate of 0.5-0.8°C / min, and keeping warm for 280-320 minutes; heating to 98-100°C at a heating rate of 0.5-0.8°C / min, and keeping warm for 60 minutes; cooling to 78-82°C at a cooling rate of 1°C / min, draining, washing, and setting.

4. The process for preparing the antistatic, lightweight, anti-downfall fabric according to claim 3, characterized in that: The process conditions for shaping are: temperature 160-165°C, speed 40-45m / min.

5. The process for preparing the antistatic, lightweight, anti-downfall fabric according to claim 1, characterized in that: The finishing process is as follows: use a nylon roller, calender 3 to 4 times at a calendering temperature of 165 to 172°C, a pressure of 180 to 200 N / mm, and a speed of 20 to 25 m / min; then cold press and finalize.

6. The process for preparing the antistatic, lightweight, anti-downfall fabric according to claim 1, characterized in that: After dyeing, a floating knife coating machine is used to apply water-based sizing agent on the surface of the obtained fabric, and then baked to form a coating; The water-based adhesive includes the following components by mass: 30-100 g / L of polyamide, 0.5-2.5 g / L of a cross-linking agent and 1-3 g / L of a blocked isocyanate.

7. The process for preparing the antistatic, lightweight, anti-downfall fabric according to claim 6, characterized in that: Polyamide is made by the following process: The carboxyl-terminated chitosan and amino-terminated polysiloxane are mixed, heated to 120-130° C. under nitrogen protection, stirred for 60-90 minutes, a catalyst is added, heated to 240-250° C., reacted for 3-4 hours at a vacuum degree of -0.1 MPa to obtain polyamide.

8. The process for preparing the antistatic, lightweight, anti-downfall fabric according to claim 7, characterized in that: The carboxyl-terminated chitosan is prepared by the following process: chitosan, tetracarboxylic acid compound, EDC and NHS are mixed in an ethanol solution, the pH of the system is adjusted to 3.5-3.8, and the reaction is stirred at 35-42°C for 72-84h to obtain the carboxyl-terminated chitosan.

9. The process for preparing the antistatic, lightweight, anti-downfall fabric according to claim 8, characterized in that: The tetracarboxylic acid compound is prepared by the following process: Under nitrogen protection, 1,4,5,8-naphthalenetetracarboxylic anhydride and polyetheramine are mixed in anhydrous ethanol, heated to 80-85° C., and refluxed for 100-150 minutes to obtain a diamine compound; Under nitrogen protection, the diamine compound and anhydrous ethanol are mixed, stirred and methyl acrylate is added, and the mixture is reacted in the dark for 21 to 24 hours to obtain a terminal ester compound; The terminal ester compound and the ethanol solution are mixed, the pH of the system is adjusted to 2.0, and the mixture is stirred and reacted at a temperature of 35° C. to 42° C. for 72 to 84 hours to obtain a tetracarboxylic acid compound.

10. An antistatic, lightweight, anti-down fabric obtained by the preparation process according to any one of claims 1 to 9.

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