An ultra-high anti-down feather down jacket fabric and a preparation process thereof

Abstract

The present application relates to a kind of super high anti-drilling down feather down jacket fabric and its preparation process, the preparation process is that silk fiber, spinning auxiliary agent and modified SiO2 precursor sol are proportioned uniformly to obtain spinnable sol, and modified SiO2 nanofiber membrane is prepared by electrospinning technology, after the modified SiO2 nanofiber membrane is dried, aerogel elastic film is obtained, which is attached on base cloth to obtain super high anti-drilling down feather down jacket fabric;Wherein, the spinning auxiliary agent is at least one of polyvinyl acetal solution, polybutylene succinate solution.The super high anti-drilling down feather down jacket fabric prepared has high air permeability and high anti-drilling down feather performance, and the fabric has good toughness and good elasticity, can be washed, so that the high air permeability and high anti-drilling down feather performance of the fabric are more durable.

Description

Technical Field

[0001] This invention belongs to the field of fabric technology, specifically relating to an ultra-high down-proof down jacket fabric and its preparation process. Background Technology

[0002] Down jackets are widely popular due to their lightweight and warmth, but the down-proof performance of down jacket fabrics has always been a challenge for the industry. Currently, most down jacket fabrics are made of nylon (polyamide fiber) or polyester fiber. While these materials offer some warmth and lightness, they cannot completely prevent down from escaping. The main reasons include the breathability of the fabric itself and the presence of pinholes. When the air permeability of the fabric is reduced to enhance the down-proof performance, the down leakage problem at the pinholes becomes more severe under compression.

[0003] To achieve both down-proof and breathable properties in down jacket fabrics, an aerogel membrane can be laminated onto the surface of a base fabric woven from nylon (polyamide fiber) or polyester fiber. Existing aerogel membranes include SiO2-based aerogel membranes. However, SiO2-based aerogel membranes suffer from numerous defects and poor continuity in their internal nano-skeleton network structure, resulting in low material strength, high brittleness, and poor stability. Under external stress (such as repeated washing), the aerogel membrane is prone to irreversible structural damage or even collapse, which greatly limits its practical application. Therefore, this invention provides an ultra-high down-proof down jacket fabric and its preparation process to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide an ultra-high down-proof down jacket fabric and its preparation process in order to solve the above-mentioned problems.

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

[0006] A process for preparing an ultra-high down-proof down jacket fabric involves mixing silk fibers, spinning aids, and modified SiO2 precursor sol in a specific ratio to obtain a spinnable sol, which is then electrospinned to form a modified SiO2 nanofiber membrane. After drying, the modified SiO2 nanofiber membrane is used to obtain an aerogel elastic membrane, which is then bonded to a base fabric to obtain the ultra-high down-proof down jacket fabric.

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

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

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

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

[0011] As a further optimization of the present invention, the raw materials for preparing the modified SiO2 precursor sol include methyl orthosilicate, water, and citric acid in a mass ratio of 1:1:(0.05-0.1). The methyl orthosilicate, water, and citric acid are mixed in the mass ratio and heated in a water bath at 35-45°C with continuous stirring for 2-3 hours to obtain the modified SiO2 precursor sol.

[0012] As a further optimization of the present invention, the drying temperature is 75-85℃ and the time is 1-2h.

[0013] As a further optimization of the present invention, the base fabric is obtained by weaving polyamide fiber or polyester fiber, the weave structure of the base fabric is double-threaded, the fineness of the warp and weft yarns is 7-40D, the weaving density of the warp yarns is 65-110 threads / cm, and the weft yarns are 45-85 threads / cm.

[0014] A type of down-proof fabric for down jackets is prepared using the above-mentioned manufacturing process.

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

[0016] 1) The ultra-high down-proof down jacket fabric prepared by this invention has both high breathability and high down-proof performance, and the fabric has good toughness and elasticity, and can be washed, so that the high breathability and high down-proof performance of the fabric can be maintained for a longer time.

[0017] 2) The present invention adds silk fibers, polyvinyl acetal solution and / or polybutylene succinate solution to the spinnable sol system to enhance the skeleton structure of the aerogel elastic membrane. The skeleton structure has good continuity and uniform distribution, which makes the high breathability of the fabric last.

[0018] 3) This invention, with the presence of silk fibers in the spinnable sol system, combined with the use of polyvinyl alcohol acetal solution and polybutylene succinate solution, has a significant effect on maintaining the high breathability of the fabric for a long time.

[0019] 4) Under the premise of enhancing and dispersing the skeletal structure of the aerogel elastic membrane, the present invention uses citric acid to modify the SiO2 precursor sol, which can make the pore structure of the aerogel elastic membrane more uniformly distributed, thereby further improving the air permeability of the aerogel elastic membrane. Detailed Implementation

[0020] The present application will now be described in further detail. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection 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 were all purchased from Chongqing Ruiya Biotechnology Co., Ltd., with a purity of 99%.

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

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

[0025] Unless otherwise specified, all methods used in the following examples can be performed using conventional methods. Other materials and reagents used can be obtained commercially unless otherwise specified.

[0026] II. Methods

[0027] 2.1 Preparation of Aerogel Elastic Membrane

[0028] (1) Methyl orthosilicate, water and citric acid in a mass ratio of 1:1:0.07 were mixed evenly and heated in a water bath at 40°C for 2.5 h with continuous stirring to obtain modified SiO2 precursor sol.

[0029] (2) Mix polyvinyl acetal with anhydrous ethanol evenly, heat in a water bath at 55°C and stir continuously for 7 hours to prepare a polyvinyl acetal solution with a mass concentration of 15%.

[0030] (3) Mix polybutylene succinate and tetrahydrofuran evenly, heat in a water bath at 42°C and stir continuously for 5 hours to prepare a polybutylene succinate solution with a mass concentration of 15%.

[0031] (4) The spinning aids, such as the polyvinyl acetal solution and polybutylene succinate solution prepared above (the mass ratio of polyvinyl acetal solution and polybutylene succinate solution is 1:1), are first mixed evenly with silk fibers. After being kept at 45°C for 1 hour, the mixture is added to the modified SiO2 precursor sol and stirred to ensure thorough mixing to obtain a spinnable sol. The mass ratio of silk fibers, spinning aids, and modified SiO2 precursor sol in the spinnable sol is 0.3:1:1. The spinnable sol is then used to prepare modified SiO2 nanoparticles using electrospinning technology. The modified SiO2 nanofiber membrane was prepared by electrospinning at a pressure of 12 kV, a spinnable sol injection speed of 0.2 mm / min, a collection speed of 60 r / min, a temperature of 24 °C, and a relative humidity of 43% (the electrospinning process parameters of the spinning solution are those that can be adjusted by those skilled in the art according to conventional processes. This embodiment provides specific parameters for the preparation of the fabric in this application, but is not limited to these parameters). The modified SiO2 nanofiber membrane obtained by electrospinning was dried at 78 °C for 2 h to obtain an aerogel elastic membrane A1 for later use.

[0032] Aerogel elastic film A2: The only difference between it and the above-mentioned aerogel elastic film A1 is that in step (4), only polyvinyl alcohol acetal solution (mass concentration of 15%) is used, that is, polybutylene succinate solution (mass concentration of 15%) is replaced with an equal mass of polyvinyl alcohol acetal solution (mass concentration of 15%). The rest of the preparation process is the same as the preparation process of aerogel elastic film A1.

[0033] Aerogel elastic film A3: The only difference between it and the above-mentioned aerogel elastic film A1 is that in step (4), only polybutylene succinate solution (mass concentration of 15%) is used, that is, polyvinyl alcohol acetal solution (mass concentration of 15%) is replaced with an equal mass of polybutylene succinate solution (mass concentration of 15%). The rest of the preparation process is the same as the preparation process of aerogel elastic film A1.

[0034] Aerogel elastic film D1: The only difference between it and the above-mentioned aerogel elastic film A1 is that, in step (1), citric acid and methyl orthosilicate are mixed with an equal mass of water. The rest of the preparation process is the same as that of aerogel elastic film A1.

[0035] Aerogel elastic film D2: The only difference between it and the above-mentioned aerogel elastic film A1 is that in step (1), citric acid is replaced with an equal mass of phosphoric acid in the mixing with methyl orthosilicate and water. The rest of the preparation process is the same as that of aerogel elastic film A1.

[0036] Aerogel elastic membrane D3: The only difference between it and the above-mentioned aerogel elastic membrane A1 is that no silk fibers are added in step (4), and the rest of the preparation process is the same as that of aerogel elastic membrane A1.

[0037] Aerogel elastic membrane D4: The only difference between it and the above-mentioned aerogel elastic membrane A1 is that cotton fibers of equal mass are used instead of silk fibers. All other preparation processes are the same as those of aerogel elastic membrane A1.

[0038] Aerogel elastic film D5: The only difference between it and the above-mentioned aerogel elastic film A1 is that no spinning aid is added in step (4), and the rest of the preparation process is the same as that of aerogel elastic film A1.

[0039] Aerogel elastic film D6: The only difference from the above aerogel elastic film A1 is that the polyvinyl alcohol solution (mass concentration of 15%) is replaced with an equal mass of polyvinyl alcohol solution (mass concentration of 15%). The rest of the preparation process is the same as that of aerogel elastic film A1.

[0040] It should be noted that the 15% polyvinyl alcohol solution differs from the 15% polyvinyl alcohol acetal solution in that it uses polyvinyl alcohol as a raw material and is mixed evenly with anhydrous ethanol; the water bath heating temperature is 90℃.

[0041] Aerogel elastic film D7: The only difference from the above aerogel elastic film A1 is that the polyvinyl butyral solution (mass concentration of 15%) is replaced with an equal mass of polyvinyl butyral solution (mass concentration of 15%). The rest of the preparation process is the same as that of aerogel elastic film A1.

[0042] It should be noted that the 15% polyvinyl butyral solution differs from the 15% polyvinyl acetal solution in that it uses polyvinyl butyral as a raw material and is mixed evenly with anhydrous ethanol.

[0043] Blank group: The difference from the above aerogel elastic film A1 is that in step (1), citric acid and methyl orthosilicate were mixed with an equal mass of water; in step (4), silk fibers and spinning aids were not added, and the rest of the preparation process was the same as the preparation process of aerogel elastic film A1.

[0044] 2.2 Preparation of Ultra-High Down-Leakage-Resistant Down Jacket Fabric

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

[0046] (2) The aerogel elastic film (A1-3, D1-7, blank group) prepared in step 2.1 is laminated onto the surface of the base fabric using a PUR type hot melt adhesive laminating machine to obtain ultra-high down-proof down jacket fabric (A1-3, D1-7, blank group; corresponding to the above aerogel elastic film A1-3, D1-7, blank group).

[0047] III. Performance Testing

[0048] 3.1 Downproof performance test

[0049] Samples were washed 30 times: The samples were washed according to the procedure specified in GB / T 8629—2001 "Domestic Washing and Drying Procedures for Textile Testing". A horizontal rotary drum washing machine was used for the washing test. The total load was 3.2 kg, the washing temperature was 35℃ for 19 min, and the number of washing cycles was 30. After the last washing cycle, the samples were dehydrated for 6 min and dried at a temperature of 45℃±5℃.

[0050] According to the national standard GB / T12705.2-2009 "Textiles - Test Method for Downproofness of Fabrics - Part 2: Rotating Box Method", the downproofness of the fabric prepared in step 2.2 above was tested. When the number of down threads is greater than 15, the fabric has poor downproofness; when it is 6-15, it has good downproofness; and when it is less than 5, it has good downproofness. The test results are recorded in Table 1 below:

[0051] Table 1. Test data on the down-proof performance of the fabric

[0052]

[0053]

[0054] Experimental conclusions: As can be seen from the data in Table 1, the ultra-high down-proof down jacket fabrics A1-3 prepared by the present invention all have good down-proof effects and can still maintain good down-proof effects after multiple washes. Among them, the ultra-high down-proof down jacket fabric A1 has the best effect and is the optimal embodiment.

[0055] 3.2 Breathability Test

[0056] The samples were washed 25 times: The fabric samples prepared in step 2.2 above were subjected to a water washing test according to the procedure specified in GB / T 8629—2001 "Domestic Washing and Drying Procedures for Textile Testing". A horizontal rotary drum washing machine was used for the water washing test. The total load was 2.8 kg, the washing temperature was 32℃ for 21 min, and the number of water washing cycles was 25. After the last water washing cycle, the samples were dehydrated for 5 min and dried at a temperature of 50℃±5℃.

[0057] Referring to the national standard (GB / T 5453), the air permeability of unwashed samples and samples washed 25 times was tested using a YG461G fully automatic fabric air permeability meter. The specific experimental parameters were set as follows: ambient temperature 23℃, relative humidity 55%, pressure difference 100Pa, and air permeability area 20cm². 2 The nozzle diameter was 0.6 mm. Six tests were conducted on different parts of the fabric sample, and the average value was taken as the final air permeability data, as shown in Table 2.

[0058] Table 2. Test data on fabric breathability

[0059]

[0060] Experimental conclusion: As can be seen from the data in Table 2, all three ultra-high down-proof down jacket fabrics A1-3 have good breathability. Among them, ultra-high down-proof down jacket fabric A1 has the best breathability and the best long-lasting effect in maintaining breathability.

[0061] Analysis revealed that the addition of silk fibers and polyvinyl acetal solution and / or polybutylene succinate solution can enhance the skeletal structure of the aerogel elastic membrane. The skeletal structure has good continuity and uniform distribution, which helps maintain the high breathability of the fabric for a long time. Moreover, with the presence of silk fibers in the spinnable sol system, the use of polyvinyl acetal solution and polybutylene succinate solution in a 1:1 mass ratio is effective in maintaining the high breathability of the fabric for a long time. Furthermore, after enhancing the skeletal structure of the aerogel elastic membrane and making its skeletal structure more uniform, the use of citric acid to modify the SiO2 precursor sol can make the pore structure of the aerogel elastic membrane even more uniform, thereby further improving the breathability of the aerogel elastic membrane.

[0062] 3.3 Tensile strength and elastic recovery performance test

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

[0064] Table 3. Test data on fabric abrasion resistance

[0065]

[0066] Experimental conclusions: Analysis of the data in Table 3 shows that the ultra-high down-proof down jacket fabrics A1-3 prepared by this invention, especially the ultra-high down-proof down jacket fabric A1, have good toughness and elasticity. This indicates that the silk fiber, polyvinyl acetal solution, and polybutylene succinate solution have a synergistic effect, enabling the fabric to have both high breathability and high down-proof performance. In addition, the fabric has good toughness and elasticity, and is washable, making the high breathability and high down-proof performance of the fabric last longer.

[0067] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A process for preparing an ultra-high down-proofing fabric for a down jacket, characterized by: The modified SiO2 nanofiber membrane is prepared by electrospinning technology through mixing the silk fiber, the spinning aid and the modified SiO2 precursor sol in proportion, drying the modified SiO2 nanofiber membrane to obtain an aerogel elastic membrane, and adhering the aerogel elastic membrane to a base cloth to obtain the super-high anti-drilling down feather and down jacket fabric. The spinning aid is at least one of a polyvinyl acetal solution and a polybutylene succinate solution. 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). The polyvinyl acetal solution is prepared by mixing polyvinyl acetal and anhydrous ethanol uniformly, heating in a water bath at a temperature of 50-60 DEG C and continuously stirring for 6-8 hours to obtain a polyvinyl acetal solution with a mass concentration of 14-18%. The polybutylene succinate solution is prepared by mixing polybutylene succinate and tetrahydrofuran uniformly, heating in a water bath at a temperature of 40-55 DEG C and continuously stirring for 4-6 hours to obtain a polybutylene succinate solution with a mass concentration of 12-16%. The preparation raw material of the modified SiO2 precursor sol includes methyl orthosilicate, water and citric acid with a mass ratio of 1:1:(0.05-0.1), and the modified SiO2 precursor sol is prepared by mixing the methyl orthosilicate, water and citric acid with a mass ratio, heating in a water bath at a temperature of 35-45 DEG C and continuously stirring for 2-3 hours.

2. The process for preparing an ultra-high down-proofing fabric for a down jacket according to claim 1, characterized in that: The drying treatment is performed at a temperature of 75-85 DEG C for 1-2 hours.

3. The process for preparing an ultra-high down-proofing fabric for a down jacket according to claim 1, characterized in that: The base cloth is obtained by weaving polyamide fibers or polyester fibers, and the weaving organization of the base cloth is double-line grid, the fineness of the warp and weft yarns is 7-40D, the weaving density of the warp yarns of the base cloth is 65-110 per cm, and the weaving density of the weft yarns of the base cloth is 45-85 per cm.

4. An ultra-high down-proof wadded garment fabric, characterized by: The super-high anti-drilling down feather and down jacket fabric is prepared by the preparation process of any one of claims 1-3.

Images