Flame-retardant waterproof fabric for bags and suitcases and preparation method of flame-retardant waterproof fabric

Abstract

The invention discloses a flame-retardant waterproof fabric for bags and suitcases and a preparation method of the flame-retardant waterproof fabric, and belongs to the technical field of garment fabric preparation. The preparation method comprises the following steps: cleaning the polyester fabric, removing impurities, airing, carrying out flame-retardant finishing, carrying out primary drying, carrying out waterproof finishing after primary baking, and then carrying out secondary drying and secondary baking treatment to obtain the flame-retardant waterproof fabric. The obtained fabric is good in flame retardance and waterproof performance; after being washed for multiple times, the fabric still keeps relatively good performance.

Description

Technical Field

[0001] The invention belongs to the technical field of clothing fabric preparation, and particularly relates to a flame-retardant and waterproof fabric for luggage and a preparation method thereof. Background Art

[0002] Bags and luggage generally refer to containers used to hold and carry items, including backpacks, handbags, trolley cases, briefcases, and dozens of other categories. Their core functions are storage and portability, combining practicality with decorativeness, and are an important part of modern life and clothing culture. There are many types of fabrics for making bags and luggage, which can be divided into the following categories based on material properties and uses: (1) natural fabrics, such as leather fabrics (cowhide, sheepskin, pigskin, etc.), canvas (pure cotton or linen), linen (woven from hemp plant fibers), etc.; (2) synthetic fabrics, such as nylon, polyester, Oxford cloth, etc.; (3) special functional fabrics, such as carbon fiber, polycarbonate, etc. Among them, polyester has the advantages of wrinkle resistance, ironing resistance, corrosion resistance, and easy dyeing, and its cost is lower than nylon. It is often used in the production of outdoor products such as computer bags and trolley cases. However, the use of outdoor products often requires exposure to changing environments, such as humidity, heat, and high temperature. Improving the flame retardant and waterproof properties of fabrics is of great practical significance for extending the service life of bags and luggage.

[0003] In the prior art, there have been some related reports. For example, patent document CN113152087A provides a waterproof flame retardant finishing agent and a finishing process for polyester fabrics. Specifically, a waterproof flame retardant finishing agent is provided, which is composed of 180-250g / L phosphate flame retardant, 10-30g / L acrylic ester emulsion ester waterproofing agent and 10-30g / L isocyanate crosslinking agent. By optimizing the finishing agent ratio and coordinating with a suitable finishing process, the flame retardant performance of the finished polyester fabric meets the national standard and the waterproof performance meets the American Standard Class IV standard. The waterproof flame retardant finishing agent provided in the above document can achieve a certain effect, but the long-term effect is not enough and the efficacy is easily seriously reduced after washing.

[0004] For example, patent document CN113279262A provides a method for preparing flame-retardant and waterproof fabrics, which includes the following steps: step 1, preparing a flame-retardant and waterproof functional finishing liquid according to a process recipe; step 2, immersing the fabric in the flame-retardant and waterproof functional finishing liquid and squeezing the liquid; step 3, pre-baking and baking; the flame-retardant and waterproof functional finishing liquid is composed of a flame-retardant and waterproof functional finishing agent and water; the preparation of the flame-retardant and waterproof functional finishing agent includes two main steps of preparing amino-terminated polysiloxane and phosphorus-containing polysiloxane by acid ring opening, which involves the synthesis of polymers, the process is relatively complicated, and the flame retardant performance needs to be further improved.

[0005] In view of this, it is desirable to propose the present invention. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a flame retardant and waterproof fabric for luggage and a preparation method thereof. The obtained fabric has excellent flame retardant and waterproof properties; after multiple washings, it still maintains good performance.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a method for preparing a flame-retardant and waterproof fabric for luggage, comprising the following steps: cleaning and removing impurities from the polyester fabric, drying it, first performing a flame-retardant finishing treatment, performing a primary drying and a primary baking treatment, and then performing a waterproof finishing treatment, followed by a secondary drying and a secondary baking treatment, thereby obtaining the flame-retardant and waterproof fabric; The flame retardant finishing comprises placing the polyester fabric in a flame retardant finishing liquid for 0.5 to 5 hours and then rolling and pressing. The preparation of the flame retardant finishing liquid comprises the following steps: S1, pre-modification of vermiculite; the vermiculite raw material is added to a hydrochloric acid solution, heated, filtered, washed, dried, ground and sieved to obtain pre-modified vermiculite; S2, modification of vermiculite: adding the pre-modified vermiculite obtained in step S1 to a sodium trifluoroacetate aqueous solution for treatment, filtering, washing, and drying to obtain preliminary modified vermiculite; adding the obtained preliminary modified vermiculite to a boric acid ethanol solution, and then heating the solution to obtain modified vermiculite; S3, modification of carbon nanotubes; placing the carbon nanotubes in a mixed acid for treatment, and then filtering, washing, and drying to obtain modified carbon nanotubes; S4, adding fatty alcohol polyoxyethylene ether to the raw lacquer, stirring evenly, then adding the polyurethane emulsion, then stirring evenly, adding the modified vermiculite obtained in step S2 and the modified nanotubes obtained in step S3, and stirring evenly again to obtain a flame retardant finishing liquid.

[0008] As a preferred embodiment of the technical solution of the present invention, in step S1, the concentration of the hydrochloric acid solution is 0.1~0.25 mol / L; the heating treatment temperature is 40~55°C, the treatment time is 2~8h, the usage ratio of vermiculite and hydrochloric acid solution is 1g:5~12mL; and the sieve mesh size is 100~150 mesh.

[0009] As a preferred embodiment of the technical solution of the present invention, in step S2, the concentration of the sodium trifluoroacetate aqueous solution is 4-8 wt %, and the usage ratio of the pre-modified vermiculite and the sodium trifluoroacetate aqueous solution is 1 g: 4-8 mL; The treatment temperature of the pre-modified vermiculite in the sodium trifluoroacetate aqueous solution is 50-70°C, and the treatment time is 4-8 hours.

[0010] As a preferred embodiment of the technical solution of the present invention, in step S2, the concentration of the boric acid ethanol solution is 0.05-0.15 g / mL, and the usage ratio of the preliminary modified vermiculite and the boric acid ethanol solution is 1 g: 15-25 mL; The heating treatment temperature of the preliminarily modified vermiculite in the boric acid ethanol solution is 55-70°C, and the treatment time is 10-25 minutes.

[0011] As a preferred embodiment of the technical solution of the present invention, in step S3, the mixed acid is obtained by mixing concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 1:3; the mass ratio of carbon nanotubes to the mixed acid is 1:40-60; the treatment temperature is 55-75°C, and the treatment time is 2-6 hours.

[0012] As a preferred embodiment of the technical solution of the present invention, in step S4, the mass ratio of fatty alcohol polyoxyethylene ether, raw lacquer, polyurethane emulsion, modified vermiculite, and modified nanotubes is 1.5-2.5:100:20-30:3-12:0.8-2.

[0013] As a preferred embodiment of the technical solution of the present invention, the waterproof finishing is as follows: placing the polyester fabric after primary drying in a waterproof finishing liquid, immersing it at 30-45°C for 4-8 hours, and rolling; The waterproof finishing liquid is composed of: 1-4g organic fluorine waterproofing agent, 0.5-1.5g organic silicon finishing agent, and 100g water.

[0014] As a preferred embodiment of the technical solution of the present invention, the primary drying temperature is 95°C and the drying time is 3-6 minutes; the primary baking temperature is 170-175°C and the time is 1-3 minutes; The secondary drying temperature is 100℃ and the drying time is 1~5min; the secondary baking temperature is 160℃ and the time is 1~4min.

[0015] In a second aspect, the present invention seeks to protect the flame-retardant and waterproof fabric prepared by the above method.

[0016] In a third aspect, the present invention aims to provide the use of the flame-retardant and waterproof fabric prepared above in clothing products, especially in the preparation of bags.

[0017] At the same time, the present invention also claims protection for the fabric prepared by the above method.

[0018] Compared with the prior art, the present invention has the following beneficial effects: (1) The flame-retardant and waterproof fabric provided by the present invention adopts a secondary finishing process, and the fabric obtained has excellent waterproof and flame-retardant properties, and maintains excellent performance after multiple washings.

[0019] (2) The preparation method of the flame-retardant and waterproof fabric provided by the present invention adopts the method of first performing flame-retardant finishing and then performing waterproof finishing. The reason is that if waterproof finishing is performed first, the surface waterproof layer will hinder the penetration of the flame retardant, resulting in a decrease in the flame retardant effect; and the substances in the flame retardant may dissolve or destroy the waterproof layer; compared with performing flame retardant and waterproofing at the same time, the present invention adopts the process of first performing flame retardant finishing and then waterproof finishing, which can greatly improve the performance of the fabric. The reason is that the flame retardant effect of the flame retardant finishing liquid requires the components of the flame retardant finishing liquid to fully penetrate into the fabric fibers. Treating the flame retardant finishing separately first can avoid the potential obstruction of penetration by the hydrophobic film of the waterproofing agent; in addition, if finishing is performed at the same time, the high molecular substances such as the waterproofing agent in the waterproof finishing liquid may wrap the components of the flame retardant finishing liquid, reducing the finishing effect.

[0020] (3) The preparation method of the flame-retardant and waterproof fabric provided by the present invention uses raw lacquer and polyurethane emulsion as main substances for the flame-retardant finishing liquid. On the one hand, the excellent flame-retardant properties of the raw lacquer are fully utilized. The rich group substances it has can be firmly combined with the fabric, ensuring the flame-retardant properties after washing. The combined use with the polyurethane emulsion ensures that the system is fully immersed in the gaps of the fabric. On the other hand, the addition of a small amount of polyurethane emulsion improves the film-forming properties of the finishing liquid system and the waterproof finishing liquid system. Therefore, the present invention controls the amount of raw lacquer used to be more than that of polyurethane emulsion.

[0021] (4) The present invention provides a method for preparing flame-retardant and waterproof fabrics. The flame-retardant finishing liquid also uses vermiculite and carbon nanotubes as filling materials to further improve the flame-retardant finishing effect. Both are good flame-retardant materials. The present invention performs corresponding treatment on the two. Specifically, the present invention first performs acid washing on the vermiculite, removes impurities, preliminarily expands the interlayer spacing and preliminarily activates it; then it is treated with sodium trifluoroacetate to further expand the interlayer spacing. At the same time, by introducing fluorine, the hydrophobicity of the vermiculite is improved, and the flame-retardant performance of the vermiculite is further improved. It is also beneficial to the subsequent boric acid modification and the composite of carbon nanotubes; then, the vermiculite is subjected to boric acid modification treatment to further improve the flame-retardant performance of the vermiculite and inhibit the high-temperature pulverization of the vermiculite. The simultaneous modification of fluorine and boron greatly ensures the composite efficiency of the carbon nanotubes and improves the dispersibility of the vermiculite in the system; in order to improve the composite effect of the carbon nanotubes, the present invention performs a simple modification treatment on them. The introduced groups can well ensure their composite with the modified vermiculite and their dispersion in raw lacquer and polyurethane emulsion.

[0022] (5) The preparation method of the flame-retardant and waterproof fabric provided by the present invention uses a small amount of fatty alcohol polyoxyethylene ether to promote the emulsification and dispersion of the system, thereby ensuring the use effect of the system.

[0023] (6) The preparation method of the flame-retardant waterproof fabric provided by the present invention mainly uses existing mature waterproofing agents and finishing agents for waterproofing, and the effect is significant.

[0024] In summary, the flame-retardant and waterproof fabric prepared in the present invention has excellent flame-retardant and waterproof properties through two finishing processes, and is suitable for the preparation of outdoor bags. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below. It should be emphasized that all the embodiments are intended to explain the present invention and should not be construed as limiting the present invention.

[0026] Unless otherwise specified, all raw materials used in this invention were purchased from commercial sources. Vermiculite was purchased from Hebei Bordian New Materials Technology Co., Ltd.; carbon nanotubes were purchased from Chengdu Organic Chemistry Co., Ltd., Chinese Academy of Sciences; fatty alcohol polyoxyethylene ether was purchased from Chengdu Kelon Chemical Reagent Factory; polyurethane emulsion, brand Archsol 8408, was purchased from Wanhua Chemical Group Co., Ltd.; organic fluorine waterproofing agent, brand TG-5601, was purchased from Daikin Fluorochemical (China) Co., Ltd.; and organosilicon finishing agent, brand Shinchem SF 9204, was purchased from Shanghai Fluoropolymer Chemical Products Co., Ltd.

[0027] Both flame retardant and waterproof finishing are treated by a dipping and padding method, with the padding rate of flame retardant finishing being about 70%; the padding rate of waterproof finishing being 60%; the implementation of the above process is a general skill mastered by those skilled in the art, and is not specifically limited or described in the present invention.

[0028] Example 1

[0029] A method for preparing a flame-retardant and waterproof fabric for luggage comprises the following steps: cleaning and removing impurities from polyester fabric, drying it, and then performing flame-retardant finishing. After primary drying (95°C, 4 minutes) and primary baking (170°C, 2 minutes), the fabric is then subjected to waterproof finishing. The fabric is then subjected to secondary drying (100°C, 3 minutes) and secondary baking (160°C, 2 minutes) to obtain the flame-retardant and waterproof fabric. The flame retardant finishing comprises placing the polyester fabric in a flame retardant finishing liquid for 2 hours and then rolling and pressing. The preparation of the flame retardant finishing liquid comprises the following steps: S1. Pre-modification of vermiculite: add the vermiculite raw material to 0.15 mol / L hydrochloric acid solution at a dosage ratio of 1 g: 10 mL, heat treat (50°C, 4 h), filter, wash, dry, grind and sieve through 150 mesh to obtain pre-modified vermiculite; S2, modification of vermiculite: according to the amount ratio of 1g:6mL, the pre-modified vermiculite obtained in step S1 was added to a 5wt% sodium trifluoroacetate aqueous solution for treatment (65°C, 5h). After the treatment, the pre-modified vermiculite was filtered, washed, and dried to obtain a preliminary modified vermiculite; according to the amount ratio of 1g:20mL, the pre-modified vermiculite was added to a 0.1g / mL boric acid ethanol solution, and then heated (60°C, 15min). After the treatment, the modified vermiculite was obtained; S3, modification of carbon nanotubes: treating the carbon nanotubes in a mixed acid (prepared by mixing concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 1:3) (65°C, 4 hours), followed by filtering, washing, and drying to obtain modified carbon nanotubes; S4. Add fatty alcohol polyoxyethylene ether to raw lacquer, stir evenly, then add polyurethane emulsion, continue stirring evenly, add modified vermiculite obtained in step S2 and modified nanotubes obtained in step S3, and stir evenly again to obtain a flame retardant finishing liquid; the mass ratio of fatty alcohol polyoxyethylene ether, raw lacquer, polyurethane emulsion, modified vermiculite, and modified nanotubes is 1.6:100:22:6:0.9.

[0030] The waterproof finishing process is as follows: placing the polyester fabric after drying once in a waterproof finishing liquid, immersing it at 35°C for 6 hours, and rolling it; the composition of the waterproof finishing liquid is: 2g of organic fluorine waterproofing agent, 0.8g of organic silicone finishing agent, and 100g of water.

[0031] Example 2

[0032] A method for preparing a flame-retardant and waterproof fabric for luggage comprises the following steps: cleaning and removing impurities from polyester fabric, drying it, and then performing flame-retardant finishing. After primary drying (95°C, 4 minutes) and primary baking (170°C, 2 minutes), the fabric is then subjected to waterproof finishing. The fabric is then subjected to secondary drying (100°C, 3 minutes) and secondary baking (160°C, 2 minutes) to obtain the flame-retardant and waterproof fabric. The flame retardant finishing comprises placing the polyester fabric in a flame retardant finishing liquid for 2 hours and then rolling and pressing. The preparation of the flame retardant finishing liquid comprises the following steps: S1. Pre-modification of vermiculite: add the vermiculite raw material to 0.16 mol / L hydrochloric acid solution at a dosage ratio of 1 g: 12 mL, heat treat (50°C, 4 h), filter, wash, dry, grind and sieve through 150 mesh to obtain pre-modified vermiculite; S2, modification of vermiculite: according to the amount ratio of 1g:5mL, the pre-modified vermiculite obtained in step S1 was added to a 4.5wt% sodium trifluoroacetate aqueous solution for treatment (65°C, 5h). After the treatment, the pre-modified vermiculite was filtered, washed, and dried to obtain a preliminary modified vermiculite; according to the amount ratio of 1g:18mL, the pre-modified vermiculite was added to a 0.1g / mL boric acid ethanol solution, and then heated (65°C, 10min). After the treatment, the modified vermiculite was obtained; S3, modification of carbon nanotubes: treating the carbon nanotubes in a mixed acid (prepared by mixing concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 1:3) (65°C, 3.5 hours), followed by filtering, washing, and drying to obtain modified carbon nanotubes; S4. Add fatty alcohol polyoxyethylene ether to raw lacquer, stir evenly, then add polyurethane emulsion, continue stirring evenly, add modified vermiculite obtained in step S2 and modified nanotubes obtained in step S3, and stir evenly again to obtain a flame retardant finishing liquid; the mass ratio of fatty alcohol polyoxyethylene ether, raw lacquer, polyurethane emulsion, modified vermiculite, and modified nanotubes is 1.6:100:24:6:0.85.

[0033] The waterproof finishing process is as follows: placing the polyester fabric after drying once in a waterproof finishing liquid, immersing it at 35°C for 6 hours, and rolling it; the composition of the waterproof finishing liquid is: 2g of organic fluorine waterproofing agent, 0.9g of organic silicone finishing agent, and 100g of water.

[0034] Example 3

[0035] A method for preparing a flame-retardant and waterproof fabric for luggage comprises the following steps: cleaning and removing impurities from polyester fabric, drying it, and then performing flame-retardant finishing. After primary drying (95°C, 4 minutes) and primary baking (170°C, 2 minutes), the fabric is then subjected to waterproof finishing. The fabric is then subjected to secondary drying (100°C, 3 minutes) and secondary baking (160°C, 2 minutes) to obtain the flame-retardant and waterproof fabric. The flame retardant finishing comprises placing the polyester fabric in a flame retardant finishing liquid for 2 hours and then rolling and pressing. The preparation of the flame retardant finishing liquid comprises the following steps: S1. Pre-modification of vermiculite: add the vermiculite raw material to 0.14 mol / L hydrochloric acid solution at a dosage ratio of 1 g: 9 mL, heat treat (55°C, 3.5 h), filter, wash, dry, grind and sieve through 100 mesh to obtain pre-modified vermiculite; S2, modification of vermiculite: according to the amount ratio of 1g:7mL, the pre-modified vermiculite obtained in step S1 was added to a 5.5wt% sodium trifluoroacetate aqueous solution for treatment (65°C, 5h). After the treatment, the pre-modified vermiculite was filtered, washed, and dried to obtain a preliminary modified vermiculite; according to the amount ratio of 1g:18mL, the pre-modified vermiculite was added to a 0.11g / mL boric acid ethanol solution, and then heated (60°C, 15min). After the treatment, the modified vermiculite was obtained; S3, modification of carbon nanotubes: treating the carbon nanotubes in a mixed acid (prepared by mixing concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 1:3) (65°C, 4 hours), followed by filtering, washing, and drying to obtain modified carbon nanotubes; S4. Add fatty alcohol polyoxyethylene ether to raw lacquer, stir evenly, then add polyurethane emulsion, continue stirring evenly, add modified vermiculite obtained in step S2 and modified nanotubes obtained in step S3, and stir evenly again to obtain a flame retardant finishing liquid; the mass ratio of fatty alcohol polyoxyethylene ether, raw lacquer, polyurethane emulsion, modified vermiculite, and modified nanotubes is 1.5:100:21:2.5:1.

[0036] The waterproof finishing process is as follows: placing the polyester fabric after drying once in a waterproof finishing liquid, immersing it at 35°C for 6 hours, and rolling it; the composition of the waterproof finishing liquid is: 2g of organic fluorine waterproofing agent, 0.8g of organic silicone finishing agent, and 100g of water.

[0037] Comparative Example 1

[0038] Compared with Example 1, the modification of sodium trifluoroacetate in step S2 is omitted in Comparative Example 1. Specifically, a method for preparing a flame-retardant and waterproof fabric for luggage comprises the following steps: cleaning and removing impurities from the polyester fabric, drying it, first performing flame-retardant finishing, performing a primary drying (95°C, 4 min) and a primary baking (170°C, 2 min) and then performing waterproof finishing, followed by a secondary drying (100°C, 3 min) and a secondary baking (160°C, 2 min) to obtain the flame-retardant and waterproof fabric; The flame retardant finishing comprises placing the polyester fabric in a flame retardant finishing liquid for 2 hours and then rolling and pressing. The preparation of the flame retardant finishing liquid comprises the following steps: S1. Pre-modification of vermiculite: add the vermiculite raw material to 0.15 mol / L hydrochloric acid solution at a dosage ratio of 1 g: 10 mL, heat treat (50°C, 4 h), filter, wash, dry, grind and sieve through 150 mesh to obtain pre-modified vermiculite; S2. Modification of vermiculite: adding the obtained pre-modified vermiculite to a 0.1 g / mL boric acid ethanol solution at a dosage ratio of 1 g:20 mL, followed by heating (60°C, 15 min) to obtain modified vermiculite; S3, modification of carbon nanotubes: treating the carbon nanotubes in a mixed acid (prepared by mixing concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 1:3) (65°C, 4 hours), followed by filtering, washing, and drying to obtain modified carbon nanotubes; S4. Add fatty alcohol polyoxyethylene ether to raw lacquer, stir evenly, then add polyurethane emulsion, continue stirring evenly, add modified vermiculite obtained in step S2 and modified nanotubes obtained in step S3, and stir evenly again to obtain a flame retardant finishing liquid; the mass ratio of fatty alcohol polyoxyethylene ether, raw lacquer, polyurethane emulsion, modified vermiculite, and modified nanotubes is 1.6:100:22:6:0.9.

[0039] The waterproof finishing process is as follows: placing the polyester fabric after drying once in a waterproof finishing liquid, immersing it at 35°C for 6 hours, and rolling it; the composition of the waterproof finishing liquid is: 2g of organic fluorine waterproofing agent, 0.8g of organic silicone finishing agent, and 100g of water.

[0040] Comparative Example 2

[0041] Compared with Example 1, the modification of boric acid in step S2 is omitted in Comparative Example 2. Specifically, a method for preparing a flame-retardant and waterproof fabric for luggage comprises the following steps: cleaning and removing impurities from the polyester fabric, drying it, first performing flame-retardant finishing, performing a primary drying (95°C, 4 min) and a primary baking (170°C, 2 min) and then performing waterproof finishing, followed by a secondary drying (100°C, 3 min) and a secondary baking (160°C, 2 min) to obtain the flame-retardant and waterproof fabric; The flame retardant finishing comprises placing the polyester fabric in a flame retardant finishing liquid for 2 hours and then rolling and pressing. The preparation of the flame retardant finishing liquid comprises the following steps: S1. Pre-modification of vermiculite: add the vermiculite raw material to 0.15 mol / L hydrochloric acid solution at a dosage ratio of 1 g: 10 mL, heat treat (50°C, 4 h), filter, wash, dry, grind and sieve through 150 mesh to obtain pre-modified vermiculite; S2. Modification of vermiculite: The pre-modified vermiculite obtained in step S1 was added to a 5 wt% sodium trifluoroacetate aqueous solution at a ratio of 1 g:6 mL for treatment (65° C., 5 h). After treatment, the modified vermiculite was filtered, washed, and dried to obtain the modified vermiculite. S3, modification of carbon nanotubes: treating the carbon nanotubes in a mixed acid (prepared by mixing concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 1:3) (65°C, 4 hours), followed by filtering, washing, and drying to obtain modified carbon nanotubes; S4. Add fatty alcohol polyoxyethylene ether to raw lacquer, stir evenly, then add polyurethane emulsion, continue stirring evenly, add modified vermiculite obtained in step S2 and modified nanotubes obtained in step S3, and stir evenly again to obtain a flame retardant finishing liquid; the mass ratio of fatty alcohol polyoxyethylene ether, raw lacquer, polyurethane emulsion, modified vermiculite, and modified nanotubes is 1.6:100:22:6:0.9.

[0042] The waterproof finishing process is as follows: placing the polyester fabric after drying once in a waterproof finishing liquid, immersing it at 35°C for 6 hours, and rolling it; the composition of the waterproof finishing liquid is: 2g of organic fluorine waterproofing agent, 0.8g of organic silicone finishing agent, and 100g of water.

[0043] Comparative Example 3

[0044] Compared with Example 1, in Comparative Example 3, the waterproof finishing liquid and the flame retardant finishing liquid are mixed together for finishing. Specifically, a method for preparing a flame retardant and waterproof fabric for luggage comprises the following steps: cleaning and removing impurities from the polyester fabric, drying it, performing a flame retardant and waterproof finishing, and performing a drying step (95°C, 4 minutes) and a baking step (170°C, 2 minutes) to obtain the flame retardant and waterproof fabric; The flame retardant and waterproof finishing comprises: placing the polyester fabric in a flame retardant and waterproof finishing liquid for 2 hours and rolling it; the flame retardant and waterproof finishing liquid is obtained by uniformly mixing the flame retardant finishing liquid and the waterproof finishing liquid; wherein the preparation of the flame retardant finishing liquid comprises the following steps: S1. Pre-modification of vermiculite: add the vermiculite raw material to 0.15 mol / L hydrochloric acid solution at a dosage ratio of 1 g: 10 mL, heat treat (50°C, 4 h), filter, wash, dry, grind and sieve through 150 mesh to obtain pre-modified vermiculite; S2, modification of vermiculite: according to the amount ratio of 1g:6mL, the pre-modified vermiculite obtained in step S1 was added to a 5wt% sodium trifluoroacetate aqueous solution for treatment (65°C, 5h). After the treatment, the pre-modified vermiculite was filtered, washed, and dried to obtain a preliminary modified vermiculite; according to the amount ratio of 1g:20mL, the pre-modified vermiculite was added to a 0.1g / mL boric acid ethanol solution, and then heated (60°C, 15min). After the treatment, the modified vermiculite was obtained; S3, modification of carbon nanotubes: treating the carbon nanotubes in a mixed acid (prepared by mixing concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 1:3) (65°C, 4 hours), followed by filtering, washing, and drying to obtain modified carbon nanotubes; S4. Add fatty alcohol polyoxyethylene ether to raw lacquer, stir evenly, then add polyurethane emulsion, continue stirring evenly, add modified vermiculite obtained in step S2 and modified nanotubes obtained in step S3, and stir evenly again to obtain a flame retardant finishing liquid; the mass ratio of fatty alcohol polyoxyethylene ether, raw lacquer, polyurethane emulsion, modified vermiculite, and modified nanotubes is 1.6:100:22:6:0.9.

[0045] The waterproof finishing liquid is composed of: 2g organic fluorine waterproofing agent, 0.8g organic silicon finishing agent, and 100g water.

[0046] The respective amounts of the flame retardant finishing liquid and the waterproof finishing liquid are the same as those in Example 1.

[0047] The flame retardant properties of the fabrics prepared in Example 1 and Comparative Examples 1 to 3 were tested with reference to GB / T 5455-2014 and GB / 13767-1992. The flame retardant properties of the fabrics were also tested after washing 50 times. The results are shown in Tables 1 and 2.

[0048] Table 1 Flame retardant properties of fabrics before washing

[0049] Table 2 Flame retardant properties of fabrics after washing

[0050] The waterproof performance of the fabrics prepared in Example 1 and Comparative Examples 1 to 3 was tested with reference to GB / T 4745-2012. The waterproof performance of the fabrics after washing 50 times was also tested. The test results are shown in Table 3.

[0051] Table 3 Fabric waterproof performance test results

[0052] As can be seen from Tables 1 to 3, the fabrics prepared by the present invention have excellent waterproof and flame retardant properties, and can still maintain good properties after washing.

[0053] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing flame-retardant and waterproof fabrics for luggage, characterized in that: The method comprises the following steps: cleaning and removing impurities from the polyester fabric, drying it, first performing flame retardant finishing, performing primary drying and primary baking, and then performing waterproof finishing, and then performing secondary drying and secondary baking to obtain the flame retardant and waterproof fabric; The flame retardant finishing comprises placing the polyester fabric in a flame retardant finishing liquid for 0.5 to 5 hours and then rolling and pressing. The preparation of the flame retardant finishing liquid comprises the following steps: S1, pre-modification of vermiculite; the vermiculite raw material is added to a hydrochloric acid solution, heated, filtered, washed, dried, ground and sieved to obtain pre-modified vermiculite; S2, modification of vermiculite: adding the pre-modified vermiculite obtained in step S1 to a sodium trifluoroacetate aqueous solution for treatment, filtering, washing, and drying to obtain preliminary modified vermiculite; adding the obtained preliminary modified vermiculite to a boric acid ethanol solution, and then heating the solution to obtain modified vermiculite; S3, modification of carbon nanotubes; placing the carbon nanotubes in a mixed acid for treatment, and then filtering, washing, and drying to obtain modified carbon nanotubes; S4, adding fatty alcohol polyoxyethylene ether to the raw lacquer, stirring evenly, then adding the polyurethane emulsion, then stirring evenly, adding the modified vermiculite obtained in step S2 and the modified nanotubes obtained in step S3, and stirring evenly again to obtain a flame retardant finishing liquid.

2. The method for preparing a flame retardant and waterproof fabric for luggage according to claim 1, characterized in that: In step S1, the concentration of the hydrochloric acid solution is 0.1-0.25 mol / L; the heating treatment temperature is 40-55° C., the treatment time is 2-8 h, the usage ratio of vermiculite to hydrochloric acid solution is 1 g: 5-12 mL; and the sieve mesh size is 100-150 mesh.

3. The method for preparing a flame retardant and waterproof fabric for luggage according to claim 1, characterized in that: In step S2, the concentration of the sodium trifluoroacetate aqueous solution is 4-8 wt %, and the usage ratio of the pre-modified vermiculite to the sodium trifluoroacetate aqueous solution is 1 g: 4-8 mL; The treatment temperature of the pre-modified vermiculite in the sodium trifluoroacetate aqueous solution is 50-70°C, and the treatment time is 4-8 hours.

4. The method for preparing a flame retardant and waterproof fabric for luggage according to claim 1, characterized in that: In step S2, the concentration of the boric acid ethanol solution is 0.05-0.15 g / mL, and the amount ratio of the preliminary modified vermiculite to the boric acid ethanol solution is 1 g: 15-25 mL; The heating treatment temperature of the preliminarily modified vermiculite in the boric acid ethanol solution is 55-70°C, and the treatment time is 10-25 minutes.

5. The method for preparing a flame retardant and waterproof fabric for luggage according to claim 1, characterized in that: In step S3, the mixed acid is obtained by mixing concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 1:3; the mass ratio of carbon nanotubes to the mixed acid is 1:40-60; the treatment temperature is 55-75° C., and the treatment time is 2-6 hours.

6. The method for preparing a flame retardant and waterproof fabric for luggage according to claim 1, characterized in that: In step S4, the mass ratio of fatty alcohol polyoxyethylene ether, raw lacquer, polyurethane emulsion, modified vermiculite, and modified nanotubes is 1.5-2.5:100:20-30:3-12:0.8-2.

7. The method for preparing a flame retardant and waterproof fabric for luggage according to claim 1, characterized in that: Waterproof finishing is as follows: Place the polyester fabric after primary drying in a waterproof finishing liquid, immerse it at 30-45°C for 4-8 hours, and then press it; The waterproof finishing liquid is composed of: 1-4g organic fluorine waterproofing agent, 0.5-1.5g organic silicon finishing agent, and 100g water.

8. The method for preparing a flame retardant and waterproof fabric for luggage according to claim 1, characterized in that: The primary drying temperature is 95℃ and the drying time is 3~6min; the primary baking temperature is 170~175℃ and the time is 1~3min; The secondary drying temperature is 100℃ and the drying time is 1~5min; the secondary baking temperature is 160℃ and the time is 1~4min.

9. A flame retardant and waterproof fabric prepared by the method according to any one of claims 1 to 8.

10. Use of the flame-retardant and waterproof fabric according to claim 9 in the preparation of bags.

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