Ultrahigh down-proof down jacket fabric and preparation process thereof

Abstract

The invention relates to an ultrahigh down-proof down jacket fabric and a preparation process thereof.The preparation process includes the steps that silk fibers, spinning auxiliaries and modified SiO2 precursor sol are evenly mixed in proportion to obtain spinnable sol, the spinnable sol is prepared into a modified SiO2 nanofiber membrane through an electrostatic spinning technology, and after the modified SiO2 nanofiber membrane is dried, an aerogel elastic membrane is obtained; the fabric is attached to base cloth, and the ultrahigh down-proof down jacket fabric is prepared; wherein the spinning auxiliary agent is at least one of a polyvinyl acetal solution and a poly (butylene succinate) solution. The prepared ultrahigh down-proof down jacket fabric has high air permeability and high down-proof performance, and is good in toughness, good in elasticity and washable, so that the high air permeability and the high down-proof performance of the fabric can be kept for a longer time.

Description

Technical Field

[0001] The present invention belongs to the technical field of fabrics, and particularly relates to an ultra-high anti-feather-down leakage down jacket fabric and a preparation process thereof. Background Art

[0002] Down jackets are widely popular because of their lightness and strong warmth retention performance. However, the anti-feather-down leakage performance of down jacket fabrics has always been a difficult problem in the industry. At present, most down jacket fabrics use fabrics woven from polyamide (polyamide fiber) or polyester fiber as the material for down jacket fabrics. Although these materials have certain warmth retention and lightness, they cannot completely prevent the feathers from leaking out. The main reasons include the air permeability of the fabric itself and the existence of pinholes. When the air permeability of the fabric decreases to enhance the anti-feather-down leakage performance, the problem of feather-down leakage at the pinholes will be more serious under the extrusion of the down jacket.

[0003] In order to endow the down jacket fabric with both anti-feather-down leakage performance and air permeability, an aerogel film can be laminated on the surface of the base fabric obtained by weaving polyamide (polyamide fiber) or polyester fiber. The aerogel films in the prior art include SiO2-based aerogel films. However, the SiO2-based aerogel films have many defects and poor continuity in the internal nano-skeleton network structure, resulting in low material strength, high brittleness, and poor stability. Under the action of external stress (such as in the case of multiple washings), the aerogel film is extremely prone to irreversible structural damage or even collapse, which greatly limits its practical application. Therefore, the present invention provides an ultra-high anti-feather-down leakage down jacket fabric and a preparation process thereof to solve the above technical problems. Summary of the Invention

[0004] The purpose of the present invention is to provide an ultra-high anti-feather-down leakage down jacket fabric and a preparation process thereof to solve the above problems.

[0005] The present invention achieves the above purpose through the following technical solutions:

[0006] A preparation process of an ultra-high anti-feather-down leakage down jacket fabric, in which a spinable sol obtained by uniformly mixing silk fiber, a spinning aid, and a modified SiO2 precursor sol in proportion is prepared into a modified SiO2 nanofiber membrane through electrospinning technology. After the modified SiO2 nanofiber membrane is dried, an aerogel elastic membrane is obtained, and it is laminated on a base fabric to prepare an ultra-high anti-feather-down leakage down jacket fabric;

[0007] Wherein, the spinning aid is at least one of polyvinyl acetal solution and polybutylene succinate solution.

[0008] As a further optimized scheme of the present invention, the mass ratio of the silk fiber, the spinning aid, and the modified SiO2 precursor sol is (0.2-0.4):(1-1.4):(1-1.3).

[0009] As a further optimized solution of the present invention, the polyvinyl acetal solution is obtained by uniformly mixing polyvinyl acetal and absolute ethanol, heating in a water bath at a temperature of 50 - 60 °C and continuously stirring for 6 - 8 h to prepare a polyvinyl acetal solution with a mass concentration of 14 - 18%.

[0010] As a further optimized solution of the present invention, the polybutylene succinate solution is obtained by uniformly mixing polybutylene succinate and tetrahydrofuran, heating in a water bath at a temperature of 40 - 55 °C and continuously stirring for 4 - 6 h to prepare a polybutylene succinate solution with a mass concentration of 12 - 16%.

[0011] As a further optimized solution of the present invention, the raw materials for preparing the modified SiO2 precursor sol include methyl orthosilicate, water, and citric acid with a mass ratio of 1:1:(0.05 - 0.1). Mix methyl orthosilicate, water, and citric acid according to the mass ratio, heat in a water bath at a temperature of 35 - 45 °C and continuously stir for 2 - 3 h to prepare the modified SiO2 precursor sol.

[0012] As a further optimized solution of the present invention, the temperature of the drying treatment is 75 - 85 °C and the time is 1 - 2 h.

[0013] As a further optimized solution of the present invention, the base fabric is woven from polyamide fiber or polyester fiber. The weaving structure of the base fabric is a double - line grid. The fineness of the warp and weft is 7 - 40 D. The weaving density of the warp is 65 - 110 pieces / cm, and the weaving density of the weft is 45 - 85 pieces / cm.

[0014] A super - high anti - down - drilling down jacket fabric is prepared by the above - mentioned preparation process.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1) The super - high anti - down - drilling down jacket fabric prepared by the present invention has both high air - permeability and high anti - down - drilling performance, and the fabric has good toughness and elasticity, and can withstand washing, so that the high air - permeability and high anti - down - drilling performance of the fabric can be maintained for a longer time;

[0017] 2) Adding silk fibers, polyvinyl acetal solution and / or polybutylene succinate solution to the spinnable sol system of the present invention can enhance the framework structure of the aerogel elastic film. The framework structure has good continuity and uniform distribution, so that the high air - permeability of the fabric can be maintained for a long time;

[0018] 3) On the premise that the spinnable sol system of the present invention contains silk fibers, the combined use of polyvinyl acetal solution and polybutylene succinate solution has a significant effect on maintaining the long - term high air - permeability of the fabric;

[0019] 4) On the premise of enhancing and evenly dispersing the skeletal structure of the aerogel elastic film, the present invention modifies the SiO2 precursor sol with citric acid, which can make the void structure distribution of the aerogel elastic film more uniform, thereby further improving the air permeability of the aerogel elastic film. Detailed implementation manners

[0020] The following further describes the present application in detail. It is necessary to point out here that the following specific implementation manners are only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0021] I. Materials

[0022] 1. Polyvinyl acetal, polybutylene succinate, polyvinyl alcohol, and polyvinyl butyral are all purchased from Chongqing Ruiya Biotechnology Co., Ltd., with a purity of 99%;

[0023] 2. Methyl orthosilicate is purchased from Shanghai Youpeng Chemical Industry Co., Ltd., with a purity of 99%;

[0024] 3. Citric acid is purchased from Chongqing Huihan Chemical Industry Co., Ltd., with a purity of 99%;

[0025] For the following examples, if no specific method is indicated, it can be carried out according to the conventional method. For other materials, reagents, etc. used, if not otherwise specified, they can be obtained through commercial channels.

[0026] II. Methods

[0027] 2.1 Preparation of the aerogel elastic film

[0028] (1) Mix methyl orthosilicate, water, and citric acid with a mass ratio of 1:1:0.07 evenly, and heat in a water bath at 40 °C and continuously stir for 2.5 h to obtain a modified SiO2 precursor sol;

[0029] (2) Mix polyvinyl acetal and absolute ethanol evenly, and heat in a water bath at 55 °C and continuously stir for 7 h to obtain a 15% polyvinyl acetal solution by mass concentration;

[0030] (3) Mix polybutylene succinate and tetrahydrofuran evenly, and heat in a water bath at 42 °C and continuously stir for 5 h to obtain a 15% polybutylene succinate solution by mass concentration;

[0031] (4) Mix the above-prepared polyvinyl acetal solution and polybutylene succinate solution and other spinning aids (the mass ratio of polyvinyl acetal solution to polybutylene succinate solution is 1:1) with silk fibers evenly first, keep them at 45 °C for 1 h, and then add them to the modified SiO2 precursor sol. Stir to make them fully mixed to obtain a spinable sol. In the spinable sol, the mass ratio of silk fibers, spinning aids, and modified SiO2 precursor sol is 0.3:1:1. Prepare the modified SiO2 nanofiber membrane from this spinable sol by electrospinning technology; the electrospinning pressure is 12 kV, the injection speed of the spinable sol is 0.2 mm / min, the collection speed is 60 r / min, the temperature is 24 °C, and the relative humidity is 43% (the electrospinning process parameters of the spinning solution can be adjusted by those skilled in the art according to the conventional process. This embodiment provides the specific parameters for preparing the fabric in this application, but is not limited to these parameters); dry the modified SiO2 nanofiber membrane obtained by electrospinning at 78 °C for 2 h to obtain an aerogel elastic membrane A1 for standby.

[0032] Aerogel elastic membrane A2: The difference from the above aerogel elastic membrane A1 is only that in step (4), only polyvinyl acetal solution (mass concentration of 15%) is used, that is, the polyvinyl acetal solution (mass concentration of 15%) of equal mass replaces the polybutylene succinate solution (mass concentration of 15%), and the rest of the preparation processes are the same as those of the gel elastic membrane A1.

[0033] Aerogel elastic membrane A3: The difference from the above aerogel elastic membrane A1 is only that in step (4), only polybutylene succinate solution (mass concentration of 15%) is used, that is, the polybutylene succinate solution (mass concentration of 15%) of equal mass replaces the polyvinyl acetal solution (mass concentration of 15%), and the rest of the preparation processes are the same as those of the gel elastic membrane A1.

[0034] Aerogel elastic membrane D1: The difference from the above aerogel elastic membrane A1 is only that in step (1), water of equal mass is used to replace the mixture of citric acid and methyl orthosilicate, and the rest of the preparation processes are the same as those of the gel elastic membrane A1.

[0035] Aerogel elastic membrane D2: The difference from the above aerogel elastic membrane A1 is only that in step (1), phosphoric acid of equal mass is used to replace the mixture of citric acid, methyl orthosilicate, and water, and the rest of the preparation processes are the same as those of the gel elastic membrane A1.

[0036] Aerogel elastic membrane D3: The difference from the above aerogel elastic membrane A1 is only that in step (4), silk fibers are not added, and the rest of the preparation processes are the same as those of the gel elastic membrane A1.

[0037] Aerogel elastic film D4: The difference from the above-mentioned aerogel elastic film A1 is only that cotton fibers of equal mass are used to replace silk fibers, and the rest of the preparation process is the same as that of the gel elastic film A1.

[0038] Aerogel elastic film D5: The difference from the above-mentioned aerogel elastic film A1 is only that in step (4), spinning aids are not added, and the rest of the preparation process is the same as that of the gel elastic film A1.

[0039] Aerogel elastic film D6: The difference from the above-mentioned aerogel elastic film A1 is only that a polyvinyl alcohol solution (mass concentration of 15%) of equal mass is used to replace the polyvinyl acetal solution (mass concentration of 15%), and the rest of the preparation process is the same as that of the gel elastic film A1;

[0040] It should be noted that the polyvinyl alcohol solution with a mass concentration of 15%: Different from the polyvinyl acetal solution with a mass concentration of 15%, polyvinyl alcohol is used as the raw material and mixed evenly with absolute ethanol; the water bath heating temperature is 90 °C.

[0041] Aerogel elastic film D7: The difference from the above-mentioned aerogel elastic film A1 is only that a polyvinyl butyral solution (mass concentration of 15%) of equal mass is used to replace the polyvinyl acetal solution (mass concentration of 15%), and the rest of the preparation process is the same as that of the gel elastic film A1;

[0042] It should be noted that the polyvinyl butyral solution with a mass concentration of 15%: Different from the polyvinyl acetal solution with a mass concentration of 15%, polyvinyl butyral is used as the raw material and mixed evenly with absolute ethanol.

[0043] Blank group: The difference from the above-mentioned aerogel elastic film A1 is that in step (1), water of equal mass is used to replace the mixture of citric acid and methyl orthosilicate; in step (4), silk fibers and spinning aids are not added, and the rest of the preparation process is the same as that of the gel elastic film A1.

[0044] 2.2. Preparation of ultra-high anti-down leakage down jacket fabric

[0045] (1). Using polyamide fiber yarn (in this invention, polyamide fiber yarn is taken as an example, and polyester fiber can also be used) as warp and weft to weave a base fabric with a weaving structure of double-line grid, the fineness of warp and weft is 20D, the weaving density of warp yarn is 75 roots / cm, and the weaving density of weft yarn is 60 roots / cm;

[0046] (2) The aerogel elastic membranes (A1-3, D1-7, blank group) obtained in Step 2.1 are laminated onto the surface of the base fabric by a PUR-type hot melt adhesive laminator to obtain the ultra-high anti-down leakage down jacket fabrics (A1-3, D1-7, blank group; corresponding to the above-mentioned aerogel elastic membranes A1-3, D1-7, blank group).

[0047] III. Performance Testing

[0048] 3.1 Anti-down leakage performance testing

[0049] Specimens after 30 times of water washing: The specimens are tested for water washing according to the standard procedures specified in GB / T 8629—2001 "Textiles - Home laundering and drying procedures for textile testing". The water washing test is carried out using a horizontal rotary drum washing machine with a total load of 3.2 kg, washing at 35°C for 19 min, the number of water washing cycles is 30 times. After the last water washing cycle ends, dehydration is carried out for 6 min, and the specimens are dried at a temperature of 45°C ± 5°C.

[0050] According to the national standard GB / T12705.2-2009 "Textiles - Test method for anti-down leakage of fabrics - Part 2: Rotary box method", the anti-down leakage of the fabrics obtained in Step 2.2 is tested. When the number of down leakage roots of the fabric is greater than 15, it has poor anti-down leakage performance; when it is 6 - 15, it has anti-down leakage performance; when it is less than 5, it has good anti-down leakage performance. The test results are recorded in Table 1 below:

[0051] Table 1 Test data of the anti-down leakage performance of the fabrics

[0052]

[0053]

[0054] Experimental conclusion: It can be seen from the data in Table 1 that the ultra-high anti-down leakage down jacket fabrics A1-3 prepared by the present invention all have good anti-down leakage effects, and can still maintain good anti-down leakage effects after multiple water washings. Among them, the fabric A1 of the ultra-high anti-down leakage down jacket has the best effect and is the optimal embodiment.

[0055] 3.2 Breathability performance testing

[0056] Specimens after 25 times of water washing: The fabric specimens obtained in Step 2.2 are tested for water washing according to the standard procedures specified in GB / T 8629—2001 "Textiles - Home laundering and drying procedures for textile testing". The water washing test is carried out using a horizontal rotary drum washing machine with a total load of 2.8 kg, washing at 32°C for 21 min, the number of water washing cycles is 25 times. After the last water washing cycle ends, dehydration is carried out for 5 min, and the specimens are dried at a temperature of 50°C ± 5°C.

[0057] Referring to the national standard (GB / T 5453), the air permeability of the unwashed specimens and the specimens washed 25 times was tested using a YG461G fully automatic fabric air permeability tester. Among them, the specific experimental parameters were set as follows: the ambient temperature was 23°C, the relative humidity was 55%, the pressure difference was 100 Pa, the air permeability area was 20 cm 2 , the diameter of the air jet nozzle was 0.6 mm. The fabric samples were tested at 6 different positions respectively, and the average value was taken as the final air permeability data, as shown in Table 2 specifically:

[0058] Table 2 Test data of fabric air permeability performance

[0059]

[0060] Experimental conclusion: It can be known from the data in Table 2 that the fabrics A1-3 of the ultra-high anti-down leakage down jackets all have good air permeability. Among them, the fabric A1 of the ultra-high anti-down leakage down jacket has the best air permeability and the best durability in maintaining air permeability;

[0061] Analysis shows that adding silk fiber and polyvinyl acetal solution and / or polybutylene succinate solution can enhance the skeleton structure of the aerogel elastic film. The skeleton structure has good continuity and uniform distribution, enabling the fabric to maintain high air permeability for a long time. And on the premise that the spinable sol system contains silk fiber, when the polyvinyl acetal solution and polybutylene succinate solution are used in a mass ratio of 1:1, the effect is significant in terms of maintaining the durability of the fabric's high air permeability. And on the premise of enhancing the skeleton structure of the aerogel elastic film and making the skeleton structure of the aerogel elastic film evenly dispersed, using citric acid to modify the SiO2 precursor sol can make the pore structure distribution of the aerogel elastic film more uniform, thereby further improving the air permeability of the aerogel elastic film.

[0062] 3.3. Tensile and elastic recovery performance tests

[0063] Tested using an LLY-06BD type electronic fiber strength tester, the tensile speed was 25 mm / min, the pre-tension was 0.30 cN, and the clamping distance was 30 mm (the elastic recovery rate was tested using a 5% fixed elongation test). Each fabric prepared in the above step 2.2 was tested 50 times respectively, and the average value was calculated to obtain the tensile and elastic recovery properties of the fabric. The results are shown in Table 3:

[0064] Table 3 Test data of fabric wear resistance performance

[0065]

[0066] Experimental conclusion: By analyzing the data in Table 3, it is known that the ultra-high anti-down leakage down jacket fabric A1-3 prepared by the present invention, especially the ultra-high anti-down leakage down jacket fabric A1, has good toughness and elasticity. This shows that there is a synergistic effect between silk fiber, polyvinyl acetal solution and polybutylene succinate solution, which enables the fabric to have both high air permeability and high anti-down leakage performance, and the fabric has good toughness and elasticity, and can withstand washing, making the high air permeability and high anti-down leakage performance of the fabric last longer.

[0067] The above-described embodiments merely represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A preparation process for a fabric of an ultra-high anti-drilling down jacket, characterized in that: The spinnable sol obtained by uniformly mixing silk fibers, spinning aids, and a modified SiO2 precursor sol in proportion is prepared into a modified SiO2 nanofiber membrane through electrospinning technology. After drying the modified SiO2 nanofiber membrane, an aerogel elastic membrane is obtained, which is laminated on a base fabric to prepare an ultra-high anti-feather leakage down jacket fabric. Among them, the spinning aid is at least one of a polyvinyl acetal solution and a polybutylene succinate solution.

2. The preparation process of a super high anti-drilling down jacket fabric according to claim 1, characterized in that: The mass ratio of the silk fibers, spinning aids, and modified SiO2 precursor sol is (0.2 - 0.4):(1 - 1.4):(1 - 1.3).

3. The preparation process of a super-high anti-down-drilling down jacket fabric according to claim 1, characterized in that: The polyvinyl acetal solution is obtained by uniformly mixing polyvinyl acetal and absolute ethanol, heating in a water bath at a temperature of 50 - 60 °C and continuously stirring for 6 - 8 h to prepare a polyvinyl acetal solution with a mass concentration of 14 - 18%.

4. The preparation process of a super high anti-drilling down jacket fabric according to claim 1, characterized in that: The polybutylene succinate solution is obtained by uniformly mixing polybutylene succinate and tetrahydrofuran, heating in a water bath at a temperature of 40 - 55 °C and continuously stirring for 4 - 6 h to prepare a polybutylene succinate solution with a mass concentration of 12 - 16%.

5. The preparation process of a super high anti-drilling down jacket fabric according to claim 1, characterized in that: The preparation raw materials of the modified SiO2 precursor sol include methyl orthosilicate, water, and citric acid with a mass ratio of 1:1:(0.05 - 0.1); methyl orthosilicate, water, and citric acid are mixed according to the mass ratio, heated in a water bath at a temperature of 35 - 45 °C and continuously stirred for 2 - 3 h to prepare the modified SiO2 precursor sol.

6. The preparation process of a super-high anti-drilling down jacket fabric according to claim 1, characterized in that: The temperature of the drying treatment is 75 - 85 °C, and the time is 1 - 2 h.

7. The preparation process of an ultra-high anti-down leakage down jacket fabric according to claim 1, characterized in that: The base fabric is woven from polyamide fibers or polyester fibers. The weaving structure of the base fabric is a double-line grid. The fineness of the warp and weft yarns is 7 - 40 D. The weaving density of the warp yarn is 65 - 110 roots / cm, and the weaving density of the weft yarn is 45 - 85 roots / cm.

8. A fabric for an ultra-high anti-drilling down jacket, characterized in that: Prepared by the preparation process described in any one of the above 1 - 7.

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