A strong and waterproof down jacket fabric and a preparation process thereof

Abstract

The application relates to a strong waterproof down jacket fabric and a preparation process thereof. The preparation process comprises the following steps: obtaining surface-roughened nano titanium dioxide after grinding treatment; dispersing the surface-roughened nano titanium dioxide, rosin resin and polyisopropyl titanate into anhydrous ethanol; obtaining coated nano titanium dioxide after evaporation and drying; obtaining modified nano titanium dioxide after modifying the coated nano titanium dioxide by using a silane coupling agent; obtaining a melt blend by melt blending polyamide fiber chips and the modified nano titanium dioxide; obtaining a matt nylon yarn after melt blending extrusion and cooling and solidification of the melt blend; obtaining the down jacket fabric by weaving the matt nylon yarn as the warp and weft; and obtaining the strong waterproof down jacket fabric after forming a PU white coating layer on the surface of the fabric. The modified nano titanium dioxide can greatly improve the wear resistance of the fabric, and the wear resistance is good in durability, so that the fabric has super strong matt and high wear resistance.

Description

Technical Field

[0001] This invention belongs to the field of fabric technology, specifically relating to a highly breathable down jacket fabric and its preparation process. Background Technology

[0002] In existing technologies, lightweight down jackets in light colors generally face the problem of insufficient breathability. Under light, the color of the inner down or lining easily shows through the fabric, affecting the aesthetic appearance. Currently, the industry mainly solves this problem in two ways: one is to add a layer of down-proof lining to the inside of the fabric to physically block down penetration and reduce light transmittance, but this significantly increases the weight and thickness of the garment, making it difficult to meet the trend of lightweight design; therefore, this method does not conform to the original design intention of lightweight down jackets in light colors. The second method is to add matting agents such as nano-titanium dioxide to polyamide fiber chips to significantly reduce the surface gloss of the prepared fabric, thereby solving the problem of insufficient breathability in lightweight down jackets in light colors. However, the added nano-titanium dioxide is prone to agglomeration, which leads to poor abrasion resistance of the fabric, and repeated washing will also affect the breathability of the fabric. Therefore, this application proposes a highly breathable down jacket fabric and its preparation process to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to provide a highly breathable down jacket fabric and its preparation process in order to solve the above-mentioned problems.

[0004] The present invention achieves the above objectives through the following technical solutions:

[0005] A manufacturing process for a highly breathable down jacket fabric includes the following steps:

[0006] Nano-titanium dioxide is ground to obtain nano-titanium dioxide with a rough surface. The rough nano-titanium dioxide, rosin resin and polytitanate isopropyl ester are dispersed in anhydrous ethanol and dried by evaporation to obtain coated nano-titanium dioxide. The coated nano-titanium dioxide is then modified by silane coupling agent to obtain modified nano-titanium dioxide.

[0007] Polyamide fiber chips are melt-blended with the modified nano-titanium dioxide to obtain a melt blend. The melt blend is then extruded through a spindle and cooled and solidified to obtain matte nylon yarn.

[0008] Down jacket fabric is obtained by weaving the aforementioned matte nylon yarn as warp and weft, and then forming a PU white coating on the surface of the down jacket fabric through a wet coating process to obtain a highly breathable down jacket fabric.

[0009] As a further optimization of the present invention, the grinding process specifically involves thoroughly mixing anhydrous ethanol and nano-titanium dioxide at a mass ratio of 1 to 1.3:1 to obtain a mixture, grinding the mixture at a speed of 400 to 600 rpm for 20 to 30 minutes, and then filtering, drying, and grinding to obtain nano-titanium dioxide with a rough surface.

[0010] As a further optimization of the present invention, the raw materials for preparing the coated nano-titanium dioxide include, by mass percentage, 10-15% of surface-roughened nano-titanium dioxide, 1.5-2% of rosin resin, 2-4% of polytitanate isopropyl ester, and 80-85% of anhydrous ethanol.

[0011] As a further optimization of the present invention, the silane coupling agent is at least one of silane coupling agents KH-550 and KH792.

[0012] As a further optimization of the present invention, the modification treatment of coated nano-titanium dioxide by silane coupling agent is specifically as follows: coated nano-titanium dioxide is mixed with 90% ethanol aqueous solution to form a suspension, silane coupling agent is added and then ultrasonically dispersed in water bath, then heated to 80-100℃ and kept at the temperature for 3-5h to carry out the modification reaction, and then modified nano-titanium dioxide is obtained after vacuum filtration and drying.

[0013] The mass ratio of the coated nano-titanium dioxide to the 90% ethanol aqueous solution is 1:20, and the amount of the silane coupling agent is 10% of the mass of the coated nano-titanium dioxide.

[0014] As a further optimization of the present invention, the amount of modified nano-titanium dioxide added in the melt blend is 0.5 to 2.5 wt%.

[0015] As a further optimization of the present invention, the spinning nozzle is a serrated spinning nozzle, and the cross-section of the dull nylon yarn is a serrated cross-section.

[0016] As a further optimization of the present invention, the highly permeable down jacket fabric is woven in a plain weave, with the warp and weft yarns having a fineness of 15-40D, the warp yarn having a weaving density of 65-100 yarns / cm, and the weft yarn having a weaving density of 45-75 yarns / cm.

[0017] A highly breathable down jacket fabric is prepared using the above-mentioned manufacturing process.

[0018] The beneficial effects of this invention are as follows:

[0019] 1) This invention grinds nano-titanium dioxide and uses rosin resin and polytitanate isopropyl acetate in synergy to form a coating effect, and then modifies it with a composite silane coupling agent (silane coupling agent KH-550 and KH792 in a mass ratio of 1:1). This can greatly improve the matting and abrasion resistance of the fabric, and the abrasion resistance is durable. This allows the fabric to maintain good matting and anti-seepage effects while also maintaining good abrasion resistance.

[0020] 2) The serrated dull nylon yarn of the present invention can increase the interlocking degree between yarns, thereby further improving the dulling performance and abrasion resistance of the fabric;

[0021] 3) By modifying nano-titanium dioxide, this invention enables the fabric to maintain good breathability even after multiple washes.

[0022] 4) This invention forms a PU white coating on the surface of down jacket fabric through a wet coating process. The PU white coating can further improve the fabric's anti-permeability and give the fabric a better down-proof effect. Detailed Implementation

[0023] 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.

[0024] I. Materials

[0025] 1. Nano titanium dioxide was purchased from Sichuan Juchun Materials Technology Co., Ltd., with a particle size of 20-150nm and a purity of 99.99%.

[0026] 2. Rosin resin was purchased from Shandong Mopai Biotechnology Co., Ltd., with a purity of 99%; polytitanate isopropyl ester was purchased from Wuhan Jiyesheng Chemical Co., Ltd., with a purity of 99%; anhydrous ethanol was commercially available.

[0027] 3. Silane coupling agent KH-550 was purchased from Wuhan Jiyesheng Chemical Co., Ltd., with a purity of 98%; Silane coupling agent KH792 was purchased from Jinan Huanzheng Chemical Co., Ltd., with a purity of 98%.

[0028] 4. The coating used for the PU white coating is water-based polyurethane resin AH-1604F, purchased from Anhui Anda Huatai New Materials Co., Ltd., and is milky white.

[0029] 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.

[0030] II. Methods

[0031] 2.1 Preparation of modified nano-titanium dioxide

[0032] Anhydrous ethanol and nano-titanium dioxide were thoroughly mixed at a mass ratio of 1.2:1 to obtain a mixture. The mixture was then ground at 540 rpm for 25 minutes, and then filtered, dried, and ground to obtain nano-titanium dioxide with a rough surface.

[0033] By mass percentage, 11% of the rough-surfaced nano-titanium dioxide, 2% of rosin resin, and 3% of polytitanate isopropyl ester were dispersed in 84% anhydrous ethanol, and after evaporation and drying, coated nano-titanium dioxide was obtained.

[0034] The coated nano-titanium dioxide was mixed with a 90% ethanol aqueous solution to form a suspension. Silane coupling agents KH-550 and KH792 (mass ratio 1:1) were added, and the mixture was dispersed in an ultrasonic water bath (ultrasonic power 150W, ultrasonic frequency 30kHz, ultrasonic time 24min, temperature 24℃). Then, the mixture was heated to 85℃ and kept at that temperature for 3.5h to carry out the modification reaction. After vacuum filtration and drying, modified nano-titanium dioxide A was obtained.

[0035] The mass ratio of coated nano-titanium dioxide to 90% ethanol aqueous solution is 1:20, and the amount of silane coupling agent is 10% of the mass of coated nano-titanium dioxide.

[0036] Modified nano titanium dioxide B: The only difference between it and modified nano titanium dioxide A is that the silane coupling agent is silane coupling agent KH-550;

[0037] Modified nano titanium dioxide C: The only difference between modified nano titanium dioxide A and modified nano titanium dioxide C is that the silane coupling agent is silane coupling agent KH792.

[0038] Modified nano-titanium dioxide A1: The difference between modified nano-titanium dioxide A and modified nano-titanium dioxide A is that the coated nano-titanium dioxide is prepared by replacing rosin resin with an equal mass of polytitanate isopropyl ester.

[0039] Modified nano-titanium dioxide A2: The difference between modified nano-titanium dioxide A and modified nano-titanium dioxide A is that the coated nano-titanium dioxide is prepared by replacing polytitanate with an equal mass of rosin resin.

[0040] Modified nano-titanium dioxide A3: The difference between modified nano-titanium dioxide A and modified nano-titanium dioxide A is that it uses an equal mass of tetrabutyl titanate to replace polyisopropyl titanate in the preparation of coated nano-titanium dioxide.

[0041] Modified nano-titanium dioxide A4: The difference between modified nano-titanium dioxide A and modified nano-titanium dioxide A is that the coated nano-titanium dioxide is prepared by replacing rosin resin with an equal mass of phenolic resin.

[0042] The modified nano-titanium dioxide D1 of control group 1 differs from modified nano-titanium dioxide A in that nano-titanium dioxide, rosin resin, and polytitanate isopropyl ester are directly dispersed in anhydrous ethanol, i.e., only the grinding process is omitted.

[0043] The modified nano-titanium dioxide D2 in control group 2 differs from modified nano-titanium dioxide A in that the rough-surfaced nano-titanium dioxide is directly mixed with a 90% ethanol aqueous solution to form a suspension without being coated with rosin resin, polytetrate, or anhydrous ethanol. In other words, the coating process is omitted.

[0044] Control group 3: Nano titanium dioxide D3: Commercially available nano titanium dioxide that has not undergone grinding, coating and silane coupling agent modification.

[0045] 2.2 Preparation of matte nylon yarn

[0046] Polyamide fiber chips are melt-blended with the modified nano-titanium dioxide or nano-titanium dioxide (AC, Al-4, D1-3) from step 2.1 to obtain a melt blend. The amount of modified nano-titanium dioxide or nano-titanium dioxide (AC, Al-4, D1-3) added to the melt blend is 1.5 wt%. The melt blend is extruded through a serrated spinning nozzle and cooled and solidified to obtain serrated matte nylon yarn (corresponding to AC, Al-4, D1-3 mentioned above).

[0047] Circular matte nylon yarn: The difference between circular and serrated matte nylon yarn A is that circular matte nylon yarn is obtained by extrusion through a circular spinning nozzle and then cooling and solidifying.

[0048] The blank group's serrated matte nylon yarn differs from serrated matte nylon yarn A in that the melt blend contains only polyamide fiber chips, meaning that the modified nano-titanium dioxide A is replaced with an equal mass of polyamide fiber chips.

[0049] 2.3 Preparation of Highly Permeable Down Jacket Fabric

[0050] The sawtooth dull nylon yarns (AC, A1-4, D1-3) obtained in step 2.2 are used as warp and weft yarns to weave down jacket fabric. The down jacket fabric has a plain weave structure, the fineness of the warp and weft yarns is 35D, the warp yarn weaving density is 75 yarns / cm, and the weft yarn weaving density is 55 yarns / cm. After forming a PU white coating on the surface of the down jacket fabric through a wet coating process, a highly breathable down jacket fabric (corresponding to AC, A1-4, D1-3 above) is obtained.

[0051] Highly impermeable down jacket fabric D4: The difference between it and highly impermeable down jacket fabric A is that it is obtained by spinning round matte nylon yarn prepared by modifying nano titanium dioxide A in step 2.1 and polyamide fiber chips.

[0052] The strong impermeability down jacket fabric in the blank group: The difference between it and the strong impermeability down jacket fabric A is that it is obtained by weaving the serrated dull nylon yarn from the blank group.

[0053] III. Performance Testing

[0054] 3.1 Extinction Performance Test

[0055] The gloss of the samples was tested according to the textile industry standard "FZ / T 01097-2006 Test Method for Fabric Gloss". The experimental instrument was the M524 fabric gloss tester manufactured by Qingdao Shanfang Instrument Co., Ltd. The gloss was calculated based on the test results using the following formula:

[0056]

[0057] Among them, G C G represents the fabric's luster. S G represents the positive reflectance gloss of the fabric, in %; R The difference between the gloss of the fabric's reflected light and its diffuse gloss, expressed as a percentage. The results are recorded in Table 1 below:

[0058] Table 1. Fabric matting performance test data

[0059]

[0060] Experimental Conclusion: The data in the table above shows that the gloss of down jacket fabrics A, B, and C with strong impermeability is relatively low. Among them, down jacket fabric A with strong impermeability has the best effect. This indicates that compared with using unmodified nano-titanium dioxide and not adding unmodified nano-titanium dioxide, the modified nano-titanium dioxide of this application, which has undergone grinding, coating, and silane coupling agent modification, can achieve a super strong matting function. Further comparison shows that the key to significantly improving the matting performance of the fabric is the grinding of nano-titanium dioxide and the coating effect formed by the synergistic use of rosin resin and polytitanate isopropyl acetate, followed by modification with a composite silane coupling agent (silane coupling agent KH-550 and KH792 in a mass ratio of 1:1). In addition, the serrated matting nylon yarn can increase the interlocking degree between yarns, thereby improving the matting effect of the fabric.

[0061] 3.4 Wear resistance test

[0062] Fabric samples washed 35 times: The samples were tested for washing according to the procedures 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 3kg, and the washing time was 37℃ for 24 minutes. The number of washing cycles was 35. After the last washing cycle, the samples were dehydrated for 7 minutes and dried at 55℃±5℃.

[0063] According to GB / T21196.2-2007 "Textiles - Determination of Abrasion Resistance of Fabrics by Martindale Method", abrasion resistance tests were conducted on fabric samples before and after washing to detect their abrasion resistance index Ai (average mass loss per rub). The results are shown in Table 2.

[0064] Table 2. Test data on fabric abrasion resistance

[0065]

[0066]

[0067] Experimental conclusions: Table 2 shows that directly adding unmodified nano-titanium dioxide to the polyamide fiber chip melt reduces the fabric's abrasion resistance, with a significant decrease after washing. However, grinding the nano-titanium dioxide and using rosin resin and polytetrate in synergy to create a coating effect, followed by modification with a composite silane coupling agent (silane coupling agents KH-550 and KH792 in a 1:1 mass ratio), can significantly improve the fabric's abrasion resistance, and the durability of this resistance is good. This allows the fabric to maintain good abrasion resistance while retaining good anti-permeability. Furthermore, the serrated matte nylon yarn can increase the interlocking between yarns, thereby improving the fabric's abrasion resistance.

[0068] 3.3 Breathability Test

[0069] Washing the sample 20 times: The sample was 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 2.5 kg, and the washing time was 37℃ for 22 min. The number of washing cycles was 20. After the last washing cycle, the sample was dehydrated for 5 min. The sample was then dried at a temperature of 50℃±5℃.

[0070] Referring to the national standard (GB / T5433), the air permeability of unwashed samples and samples washed 20 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. 2The 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 3.

[0071] Table 3. Test data on fabric breathability

[0072]

[0073] Experimental conclusion: As shown in Table 3, when unmodified nano-titanium dioxide is directly added to the polyamide fiber chip melt, the breathability of the fabric will decrease significantly after multiple washes. However, the modified nano-titanium dioxide of this application, which is obtained through grinding and the synergistic use of rosin resin and polytitanate to form a coating effect, and then modified by a composite silane coupling agent (silane coupling agent KH-550 and KH792 in a mass ratio of 1:1), can enable the fabric to maintain good breathability after multiple washes.

[0074] 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 manufacturing process for a highly breathable down jacket fabric, characterized in that: Includes the following steps: Nano-titanium dioxide is ground to obtain nano-titanium dioxide with a rough surface. The rough nano-titanium dioxide, rosin resin and polytitanate isopropyl ester are dispersed in anhydrous ethanol and dried by evaporation to obtain coated nano-titanium dioxide. The coated nano-titanium dioxide is then modified by silane coupling agent to obtain modified nano-titanium dioxide. The raw materials for preparing the coated nano-titanium dioxide, by mass percentage, include 10-15% surface-roughened nano-titanium dioxide, 1.5-2% rosin resin, 2-4% polytitanate isopropyl acetate, and 80-85% anhydrous ethanol; The silane coupling agent is silane coupling agent KH-550 or KH792 with a mass ratio of 1:1; Polyamide fiber chips are melt-blended with the modified nano-titanium dioxide to obtain a melt blend. The melt blend is then extruded through a spindle and cooled and solidified to obtain matte nylon yarn. Down jacket fabric is obtained by weaving the aforementioned dull nylon yarn as warp and weft, and a PU white coating is formed on the surface of the down jacket fabric by a wet coating process to obtain a highly breathable down jacket fabric. The spinning inlet is a serrated spinning inlet, and the cross-section of the dull nylon yarn is a serrated cross-section.

2. The preparation process of a highly permeable down jacket fabric according to claim 1, characterized in that: The grinding process specifically involves thoroughly mixing anhydrous ethanol and nano-titanium dioxide at a mass ratio of 1 to 1.3:1 to obtain a mixture, grinding the mixture at a speed of 400 to 600 rpm for 20 to 30 minutes, and then filtering, drying, and grinding to obtain nano-titanium dioxide with a rough surface.

3. The preparation process of a highly permeable down jacket fabric according to claim 1, characterized in that: The modification of coated nano-titanium dioxide by silane coupling agent is specifically carried out by mixing coated nano-titanium dioxide with 90% ethanol aqueous solution to form a suspension, adding silane coupling agent and then dispersing in an ultrasonic water bath, then heating to 80~100℃ and holding for 3-5h to carry out the modification reaction, and then obtaining modified nano-titanium dioxide after vacuum filtration and drying. The mass ratio of the coated nano-titanium dioxide to the 90% ethanol aqueous solution is 1:20, and the amount of the silane coupling agent is 10% of the mass of the coated nano-titanium dioxide.

4. The preparation process of a highly permeable down jacket fabric according to claim 1, characterized in that: The amount of modified nano-titanium dioxide added in the melt blend is 0.5~2.5wt%.

5. The preparation process of a highly permeable down jacket fabric according to claim 1, characterized in that: The highly breathable down jacket fabric has a plain weave structure, and the warp and weft yarns of the highly breathable down jacket fabric have a fineness of 15-40D. The warp yarn weaving density of the highly breathable down jacket fabric is 65-100 ends / cm, and the weft yarn weaving density of the highly breathable down jacket fabric is 45-75 ends / cm.

6. A highly breathable down jacket fabric, characterized in that: It is prepared by any one of the preparation processes described in claims 1-5.

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