A warp-knitted fleece fabric and its preparation method

Abstract

The present invention relates to the technical field of textile, and particularly relates to a warp-knitted plush fabric and a preparation method thereof. Among them, a preparation method of a warp-knitted plush fabric includes: preparation of a blended covered yarn, weaving, sanding and finishing. The blended covered yarn is woven to obtain a grey fabric; after the sanded grey fabric is treated with a finishing liquid, a silicon oxide film layer is formed on the grey fabric, reducing the surface tension of the warp-knitted plush fabric and making the warp-knitted plush fabric softer. By adding reactive fibers to the blended covered yarn, a good bonding strength is achieved between the silicon oxide film layer and the blended covered yarn. By introducing spandex yarn into the blended covered yarn, the fluff of the blended covered yarn with the silicon oxide film layer is stacked more densely, thereby making the warp-knitted plush fabric have excellent waterproof performance and wear resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of textiles, and particularly to a warp-knitted plush fabric and a preparation method thereof. Background Art

[0002] Warp knitting is a textile process belonging to the field of knitting, that is, one or several groups of parallel arranged yarns are fed into the working needles of the machine in the warp direction and looped simultaneously to form a knitted fabric; the plush fabric is formed by a raising machine pulling and breaking the extended fibers to form plush; due to the soft, delicate texture and unique texture of the warp-knitted plush fabric, it is often used as a sofa fabric, but generally the waterproof property of the warp-knitted plush fabric is poor, and when there is water on the surface of the warp-knitted plush fabric, the water easily penetrates and forms stains. Summary of the Invention

[0003] In order to improve the problem of poor waterproof property of the existing warp-knitted plush fabric, the present application provides a warp-knitted plush fabric and a preparation method thereof.

[0004] In a first aspect, the present application provides a preparation method of a warp-knitted plush fabric, and the preparation process is as follows:

[0005] Preparation of the blended covered yarn: Polyester fibers and reactive fibers with a mass ratio of 1:(0.5 - 1.5) are blended to prepare a polyester blended yarn; then the polyester blended yarn is covered on an ammonia yarn and subjected to false twist processing to prepare a blended covered yarn, wherein the mass ratio of the polyester blended yarn to the ammonia yarn is (4 - 6):1;

[0006] Weaving: The blended covered yarn is woven into a greige fabric, and the warping tension of the blended covered yarn during weaving is 1.4 - 1.8 g / tex;

[0007] Sanding: One side of the greige fabric is sanded to form plush on the surface layer of the greige fabric;

[0008] Finishing: The sanded greige fabric is impregnated with a finishing solution at 60 - 80 °C for 2 - 4 h, and the bath ratio is (8 - 10):1; after impregnation, the finishing solution is drained, and it is heated at a temperature of 150 - 170 °C for 10 - 15 min, and then prepared into a warp-knitted plush fabric after water washing, soaping, and drying;

[0009] The raw materials of the finishing solution include 2 - 5 parts of polymethylhydrogensiloxane, 2 - 3 parts of hydroxyl-terminated dimethylhydroxysilicone oil, 0.2 - 0.5 parts of polyether-modified polysiloxane, 4 - 6 parts of alkylphenol polyoxyethylene ether, 0.06 - 0.1 parts of Pt catalyst, and 1000 parts of water.

[0010] By adopting the above technical solution, the base fabric is impregnated with the finishing liquid, and the finishing liquid spreads on the base fabric and the fluff of the base fabric. At high temperature, the hydroxyl-terminated dimethylhydroxysiloxane and polymethylhydrogensiloxane react to form a silicon-oxygen film layer on the base fabric and the fluff. The silicon-oxygen film layer reduces the surface tension of the warp-knitted plush fabric and makes the warp-knitted plush fabric softer. Polymethylhydrogensiloxane enhances the bonding strength between the silicon-oxygen coating formed by the reaction and the warp-knitted plush fabric, thereby making the warp-knitted plush fabric have excellent waterproof performance and wear resistance.

[0011] In addition, since polymethylhydrogensiloxane contains active hydrogen, the fabric treated with polymethylhydrogensiloxane is prone to yellowing. In this application, hydroxyl-terminated dimethylhydroxysiloxane and polymethylhydrogensiloxane are used in combination to enhance the waterproofness, softness and wear resistance of the warp-knitted plush fabric, and at the same time improve the problem that the fabric treated with polymethylhydrogensiloxane is prone to yellowing.

[0012] In this application, spandex yarn is used in the warp-knitted plush fabric, and the tension during the warping of the blended covering yarn is set to 1.4-1.8 g / tex, so that the prepared blended covering yarn has a certain elasticity, making the fluff of the blended covering yarn with a silicon-oxygen coating denser, and further improving the waterproof performance and friction resistance of the warp-knitted plush fabric.

[0013] Preferably, the reactive fiber is one of wool, silk, viscose fiber, cotton fiber, hemp fiber, and modal fiber.

[0014] By adopting the above technical solution, the preferred reactive fiber is used in combination with the finishing liquid, enhancing the bonding strength between the silicon-oxygen film layer and the warp-knitted plush fabric, making the warp-knitted plush fabric have excellent friction resistance and waterproof performance.

[0015] Preferably, the impregnation treatment includes the first impregnation and the second impregnation. The first impregnation time is 1-2 h, the second impregnation time is 1-2 h, and the base fabric is left standing for 8-12 min after the first impregnation and then undergoes the second impregnation.

[0016] By adopting the above technical solution, the amount of the finishing liquid remaining on the warp-knitted plush fabric is increased, the compactness of the silicon-oxygen film layer is improved, and further, the friction resistance and softness of the warp-knitted plush fabric are improved.

[0017] Preferably, the finishing liquid further includes 2-6 parts of a leveling agent and 0.06-0.1 part of an initiator. The leveling agent is one of perfluorooctylpropyl acrylate, perfluorocyclohexylmethyl acrylate, and acrylic hydrocarbons.

[0018] By adopting the above technical solution, the use of a leveling agent in the finishing liquid improves the quality of the silicon-oxygen film layer, and further improves the waterproof performance and friction resistance of the warp-knitted plush fabric.

[0019] Preferably, the leveling agent is acrylic hydrocarbons.

[0020] By adopting the above technical solution, compared with perfluorooctylpropyl acrylate and perfluorocyclohexyl methyl acrylate, acrylic hydrocarbons have a shorter molecular chain and no large molecular groups on the molecular chain, making it easier to enhance the compactness of the silicon oxide film layer. The leveling agent reacts to form a polymer network, thereby enhancing the compactness of the silicon oxide coating and further improving the waterproof performance and friction resistance of the warp-knitted plush fabric.

[0021] Preferably, the finishing liquid further includes 0.4 - 0.8 parts of bentonite and 0.1 - 0.2 parts of PTFE micropowder.

[0022] By adopting the above technical solution, when bentonite and PTFE micropowder are used in combination, bentonite improves the dispersibility of PTFE micropowder and enhances the strength of the film layer formed by the finishing liquid, further improving the friction resistance and waterproof performance of the warp-knitted plush fabric.

[0023] Preferably, the blended covered yarn is treated with a microcapsule impregnating solution for 4 - 6 h under the condition of ultrasonic wave of 18 - 22 KHz before weaving, the bath ratio is 1:(8 - 10), and the temperature of the microcapsule impregnating solution is 65 - 85 °C;

[0024] The preparation process of the microcapsule impregnating solution: heat the raw material mixture to 60 - 70 °C and carry out emulsifying stirring for 30 - 40 min under the condition of a stirring speed of 4000 - 7000 r / min; add 0.1 - 0.3 parts of hydrochloric acid, react at a temperature of 60 - 70 °C and under the condition of a reaction stirring speed of 400 - 1000 r / min for 24 - 60 h to prepare the microcapsule impregnating solution;

[0025] The raw material mixture includes 2 - 4 parts of n-butyl stearate, 1 - 3 parts of sodium dodecyl sulfate, 4 - 8 parts of tetrabutyl titanate, 70 - 76 parts of deionized water and 35 - 40 parts of ethanol.

[0026] Through the above technical solution, after being treated with the microcapsule impregnating solution, microcapsules are introduced into the blended covered yarn. The warp-knitted plush fabric containing microcapsules slowly releases n-butyl stearate during use, and n-butyl stearate migrates to the surface of the warp-knitted fabric. Further, the waterproof performance of the warp-knitted plush fabric is improved, and the washability of the waterproof performance of the warp-knitted plush fabric is enhanced. At the same time, the microcapsules increase the elasticity of the warp-knitted plush fabric, thereby improving the friction resistance of the warp-knitted plush fabric.

[0027] When the finishing liquid and the microcapsules are used in combination, the film layer formed by the finishing liquid enhances the strength of the microcapsules. Further, the warp-knitted plush fabric has long-term waterproof performance and friction resistance.

[0028] Preferably, the raw material mixture further includes 3-6 parts of hydroxyl-terminated dimethyl hydroxyl silicone oil.

[0029] Through the above technical solution, part of the hydroxyl-terminated dimethyl hydroxyl silicone oil is connected to the film layer of the microcapsules, making the microcapsules have certain hydrophobic properties; in addition, the n-butyl stearate slowly released by the microcapsules is used in combination with the hydroxyl-terminated dimethyl hydroxyl silicone oil and migrates to the film layer formed on the finishing liquid of the warp knitted fleece fabric, further improving the waterproof and wear-resistant properties of the warp knitted fleece fabric.

[0030] Preferably, the stirring speed during emulsification is 5000-6000 r / min, the stirring speed after adding hydrochloric acid is 600-700 r / min, the reaction temperature is 63-65 °C, and the reaction time is 45-50 h.

[0031] Through the above technical solution, if the stirring speed during emulsification is too fast, there will be too many bubbles in the microcapsule impregnation liquid, resulting in a decrease in the density of the microcapsules in the microcapsule impregnation liquid and a reduction in the number of microcapsules in the blended covered yarn impregnated with the microcapsule impregnation liquid; if the stirring speed during emulsification is too slow, the particle size of the latex particles in the microcapsule impregnation liquid is too large, resulting in a reduction in the number of microcapsules immersed in the warp knitted fleece fabric; if the stirring speed after adding hydrochloric acid is too low, the microcapsules may adhere to each other and the particle size of the microcapsules becomes larger, and if the stirring speed after adding hydrochloric acid is too high, it may affect the film formation of the microcapsules, resulting in insufficient strength of the prepared microcapsules and poor waterproof performance of the warp knitted fleece fabric after washing.

[0032] During the preparation process of the microcapsule impregnation liquid, a suitable stirring speed is combined with a suitable reaction time and reaction temperature, so that the prepared microcapsules have a smaller particle size and higher strength, making the warp knitted fleece fabric have excellent waterproof and wear-resistant properties.

[0033] In a second aspect, the present application provides a warp knitted fleece fabric.

[0034] A warp knitted fleece fabric is obtained by using the preparation method of any warp knitted fleece fabric in the present application.

[0035] A warp knitted fleece fabric is not only soft, delicate and has a unique texture, but also has excellent friction resistance and waterproof performance, and is a preferred fabric for sofa cloth fabrics.

[0036] In summary, the present application has the following beneficial effects:

[0037] 1. The preparation process of a warp-knitted fleece fabric includes: the preparation of blended covered yarns, weaving, sanding, and finishing. Among them, the blended covered yarns are woven to obtain a grey fabric; after the sanded grey fabric is treated with a finishing solution, a silicon oxide film layer is formed on the grey fabric, reducing the surface tension of the warp-knitted fleece fabric and making the warp-knitted fleece fabric softer. By adding reactive fibers to the blended covered yarns, a good bonding strength is achieved between the silicon oxide film layer and the blended covered yarns. By introducing spandex yarns into the blended covered yarns, the fluff layers of the blended covered yarns with the silicon oxide film layer are stacked more densely, and thus the warp-knitted fleece fabric has excellent waterproof and wear-resistant properties.

[0038] 2. By using a leveling agent, bentonite, and PTFE micro-powder in the finishing solution in combination, the compactness and wear resistance of the silicon oxide film layer are synergistically enhanced, and further, the waterproof and friction resistance properties of the warp-knitted fleece fabric are improved.

[0039] 3. By treating the blended covered yarns with a microcapsule impregnating solution, microcapsules are introduced into the blended covered yarns. The finishing solution and the microcapsules are used in combination. The coating formed by the finishing solution enhances the strength of the microcapsules. The microcapsules endow the warp-knitted fleece fabric with a certain elasticity and slowly release n-butyl stearate and hydroxyl-terminated dimethyl hydroxy silicone oil, further enhancing the waterproof and friction resistance properties of the warp-knitted fleece fabric. Specific embodiments

[0040] Preparation examples of raw materials and / or intermediates Raw materials: PTFE micro-powder (particle size 1 - 3μm), hydroxyl-terminated dimethyl hydroxy silicone oil (viscosity: 20 - 40mm2 / s), polymethylhydrogensiloxane (viscosity: 10 - 50mm2 / s), PTFE micro-powder (average particle size 5μm), bentonite (average particle size 13μm), spandex yarn (30 ± 5D), polyester fiber (3.5D, 48mm), cotton fiber (39mm), viscose fiber (1.2D, 38mm), bamboo fiber (2.0D, 65mm).

[0041] Preparation example 1

[0042] A microcapsule impregnating solution, the raw material components used are shown in Table 1, and the preparation steps are as follows:

[0043] The preparation process of the microcapsule impregnating solution: Heat the raw material mixture to 70°C and emulsify it under the condition of a stirring speed of 4000r / min for 30min; add 226mL of a hydrochloric acid solution with a mass fraction of 37.5% (about 0.1kg of hydrochloric acid in the hydrochloric acid solution), and react at a reaction temperature of 70°C and a stirring speed of 400r / min for 24h to obtain the microcapsule impregnating solution.

[0044] Among them, the density of the hydrochloric acid solution with a mass fraction of 37% is 1.179g / cm 3 .

[0045] Preparation Example 2-4

[0046] A microcapsule impregnating solution, which is different from Preparation Example 1 in that: the types of raw materials used in the microcapsule impregnating solution are different, and the preparation process of the microcapsule impregnating solution is different, as shown in Table 1 specifically.

[0047] Table 1 List of the types of raw materials used in the microcapsule impregnating solutions in Preparation Examples 1-4 and the settings of the preparation process of the microcapsule impregnating solution

[0048]

[0049]

[0050] Preparation Examples 5-9

[0051] A microcapsule impregnating solution, which is different from Preparation Example 1 in that: the preparation process of the microcapsule impregnating solution is different, as shown in Table 2 specifically.

[0052] Table 2 List of the preparation process settings of the microcapsule impregnating solutions in Preparation Examples 5-9 and Preparation Example 1

[0053] Differentiation Preparation Example 1 Preparation Example 5 Preparation Example 6 Preparation Example 7 Preparation Example 8 Preparation Example 9 Stirring speed of emulsification / (r / min) 4000 5000 6000 7000 4000 7000 Stirring speed of reaction / (r / min) 400 700 600 1000 400 1000 Reaction temperature / °C 70 65 63 60 65 63 Reaction time / h 24 45 50 60 45 50

[0054] Preparation Example 10

[0055] A finishing solution, the raw material components of which are shown in Table 3, and the preparation steps are as follows:

[0056] After mixing the raw materials of the finishing solution, stir for 20 min under the condition that the stirring speed is 4000 r / min to prepare the finishing solution.

[0057] Preparation Examples 11-14

[0058] A finishing solution, which is different from Preparation Example 1 in that: the types of raw materials of the finishing solution are different, and the preparation process is different, as shown in Table 3 specifically.

[0059] Table 3 List of the types of raw materials of the finishing solutions in Preparation Examples 10-14 and the settings of the preparation process

[0060]

[0061]

[0062] Preparation Example 15

[0063] A finishing solution, which is different from Preparation Example 10 in that: bentonite and PTFE micropowder are not used in the raw materials of the finishing solution.

[0064] Preparation Example 16

[0065] A finishing solution, which is different from Preparation Example 10 in that bentonite, PTFE micropowder, perfluorooctylpropyl acrylate and azodiisobutyronitrile are not used in the raw materials of the finishing solution.

[0066] Example

[0067] Example 1

[0068] A method for preparing a warp-knitted plush fabric, with the raw material components as shown in Tables 4 - 5, and the following preparation steps are adopted:

[0069] Preparation of the blended covered yarn: First, polyester fibers and reactive fibers with a mass ratio of 1:0.5 are blended to form a polyester blended yarn; then, spandex yarn is compounded with the polyester blended yarn to form a covered yarn with spandex yarn at the center and covered on the spandex yarn, and the blended covered yarn is prepared through false twisting.

[0070] Weaving: When warping the spandex covered yarn on an ordinary long-fiber warp knitting warping machine, the warping tension of the blended covered yarn during weaving is 1.4 g / tex; the blended covered yarn is used for knitting on a 32G warp knitting machine, and the tissue form of the warp-knitted plush fabric is 10 / 12 / / , and a warp-knitted plush blank with a weight of 200 ± 10 g / m 2 is prepared.

[0071] Sanding: One side of the blank fabric is sanded through a sanding device to form plush on the surface of the blank fabric. The sanding time is 3 s and the sanding times are 2 times.

[0072] Finishing: The sanded blank fabric is impregnated with a finishing solution, with a bath ratio of 8:1, and impregnated for 2 h at 60°C; after impregnation, the finishing solution is drained and left to react at 150°C for 15 min, and then the warp-knitted plush fabric is prepared after washing, soaping and drying.

[0073] Examples 2 - 3

[0074] A method for preparing a warp-knitted plush fabric, which is different from Example 1 in that the set weights of the raw materials are different; the preparation process of the warp-knitted plush fabric is different, as shown in Table 4 specifically.

[0075] Table 4 List of the set weights of the raw materials used in Examples 1 - 3 and the set preparation process of the warp-knitted plush fabric

[0076] Differentiation Example 1 Example 2 Example 3 Polyester blended yarn / kg 40 50 60 Spandex yarn / kg 10 10 10 Mass ratio of polyester blended yarn to spandex yarn 4:1 5:1 6:1 Warping tension of blended covered yarn / (g / tex) 1.4 1.6 1.8 Sanding time / s 3 5 8 Sanding times / times 2 2 1 Finishing solution Preparation Example 10 Preparation Example 11 Preparation Example 12 Bath ratio 8:1 9:1 10；1 Impregnation temperature / °C 60 70 80 Impregnation time / h 4 3 2 Reaction temperature / °C 150 160 170 Reaction time / min 15 12 10

[0077] Examples 4 - 6

[0078] A method for preparing a warp-knitted plush fabric, which is different from Example 1 in that the set weights of the yarns used for preparing the polyester blended yarn are different, as shown in Table 5 specifically.

[0079] Table 5 List of yarn weights used in the preparation of polyester blended yarns in Examples 4-6 and Example 1

[0080]

[0081] Example 7

[0082] A method for preparing a warp-knitted plush fabric, which is different from Example 1 in that in the finishing step, the impregnation treatment includes a first impregnation and a second impregnation. After the first impregnation for 1 h, the fabric is taken out of the bath and left standing for 8 min, and then the second impregnation for 1 h is carried out.

[0083] Example 8

[0084] A method for preparing a warp-knitted plush fabric, which is different from Example 1 in that the impregnation time is 4 h.

[0085] Example 9

[0086] A method for preparing a warp-knitted plush fabric, which is different from Example 1 in that the impregnation time is 4 h, and the impregnation is carried out in two steps, namely the first impregnation and the second impregnation. After the first impregnation for 2 h, the fabric is taken out of the bath and left standing for 12 min, and then the second impregnation for 2 h is carried out.

[0087] Examples 10-13

[0088] A method for preparing a warp-knitted plush fabric, which is different from Example 1 in that the finishing liquid is sequentially prepared according to Preparation Examples 13-16.

[0089] Example 14

[0090] A method for preparing a warp-knitted plush fabric, which is different from Example 1 in that the blended covered yarn is impregnated with the microcapsule impregnating solution of Preparation Example 1 before weaving, the bath ratio is 1:8, and the impregnation is carried out at an impregnation temperature of 65 °C and an ultrasonic frequency of 22 kHz for 6 h.

[0091] Examples 15-16

[0092] A method for preparing a warp-knitted plush fabric, which is different from Example 14 in that the preparation example of the microcapsule impregnating solution used is different, and the impregnation conditions are set differently, as shown in Table 6.

[0093] Table 6 List of preparation examples of microcapsule impregnating solutions used and impregnation condition settings in Examples 14-16

[0094]

[0095]

[0096] Examples 17-22

[0097] A method for preparing a warp-knitted plush fabric, which is different from Example 14 in that the microcapsule impregnating solution of Preparation Examples 4-9 is used in sequence.

[0098] Comparative example

[0099] Comparative Example 1

[0100] A method for preparing a warp-knitted plush fabric, which is different from Example 13 in that impregnation treatment is not carried out with a finishing solution.

[0101] Comparative Example 2

[0102] A method for preparing a warp-knitted plush fabric, which is different from Example 13 in that wool is not used in the polyester blended yarn and polymethylhydrosiloxane is not used in the finishing solution.

[0103] Comparative Example 3

[0104] A method for preparing a warp-knitted plush fabric, which is different from Example 13 in that wool is not used in the polyester blended yarn and the tension during warping of the blended covered yarn is 1.0 g / tex.

[0105] Performance detection test

[0106] Test 1: Waterproof performance test method: According to GB / T4744-2013 "Testing and evaluation of the waterproof performance of textiles - Hydrostatic pressure method", a hydrostatic pressure tester is used for determination.

[0107] Washing method: Washing is carried out in accordance with GB / T8629-2017 "Textiles - Domestic washing and drying procedures for testing".

[0108] Test 2: Abrasion resistance performance test method: Test is carried out using a fabric abrasion tester of model YG522N. The warp-knitted plush fabric is cut into circular pieces with a diameter of 125 mm as the test specimens. A hole is made in the middle of the specimens. Three specimens are set for the test, and the test results are all averaged; the hair loss rate test is carried out using the rotary flat grinding method under standard atmospheric conditions; the specimens are subjected to 500 times of friction, and then the weight loss rate of the test fabric is calculated according to the formula: weight loss rate = (mass before friction - mass after friction) / mass before friction × 100%.

[0109] Test samples: The warp-knitted plush fabrics prepared in Examples 1-22 are used as test samples, and the warp-knitted plush fabrics prepared in Comparative Examples 1-3 are used as control samples.

[0110] Test results: The waterproof performance and abrasion resistance performance of the warp-knitted plush fabrics prepared in Examples 1-22 and Comparative Examples 1-3 are shown in Table 7 as follows:

[0111] Table 7 List of waterproof performance and abrasion resistance performance of warp-knitted plush fabrics prepared in Examples 1-22 and Comparative Examples 1-3

[0112]

[0113] Combined with Examples 1-22 and Comparative Examples 1-3 and Table 7, it can be seen that:

[0114] The hydrostatic pressure before washing (50-65 Kpa) of the warp-knitted plush fabric prepared in Examples 1-22 is higher than that of the warp-knitted plush fabric prepared in Comparative Examples 1-3 (39-48 Kpa).

[0115] The hydrostatic pressure after washing (46-62 Kpa) of the warp-knitted plush fabric prepared in Examples 1-22 is higher than the hydrostatic pressure before washing (33-43 Kpa) of the warp-knitted plush fabric prepared in Comparative Examples 1-3.

[0116] The weight loss rate (0.46-0.61%) of the warp-knitted plush fabric prepared in Examples 1-22 is lower than that of the warp-knitted plush fabric prepared in Comparative Examples 1-3 (0.71-1.5%).

[0117] It shows that after the grey fabric woven with the blended covered yarn is treated with the finishing liquid, a silicon oxide film layer is formed on the grey fabric, reducing the surface tension of the warp-knitted plush fabric and making the warp-knitted plush fabric softer. By introducing reactive fibers into the blended covered yarn, the bonding strength between the silicon oxide film layer and the blended covered yarn is enhanced. By introducing spandex yarn into the blended covered yarn, the fluff layer with the silicon oxide film layer on the blended covered yarn is stacked more closely, and thus the warp-knitted plush fabric has excellent waterproof performance and wear resistance; further, by using a leveling agent, bentonite and PTFE micro-powder in the finishing liquid and introducing microcapsules into the blended covered yarn, the waterproof performance and friction resistance of the warp-knitted plush fabric are further enhanced.

[0118] The hydrostatic pressure of the warp-knitted plush fabric prepared in Example 7 is higher than that in Example 1, and the weight loss rate is lower than that in Example 1; the hydrostatic pressure of the warp-knitted plush fabric in Example 9 is higher than that in Example 8, and the weight loss rate is lower than that in Example 8. This may be because the impregnation is carried out in two steps, making the waterproof coating formed on the warp-knitted plush fabric more uniform and closer, so that the warp-knitted plush fabric has better waterproof performance and wear resistance.

[0119] The hydrostatic pressure of the warp-knitted plush fabric prepared in Example 10 is higher than that in Example 1, and the weight loss rate is lower than that in Example 1; the hydrostatic pressure of the warp-knitted plush fabric in Example 2 is higher than that in Example 11, and the weight loss rate is lower than that in Example 11. This may be because the leveling agent of acrylic hydrocarbon has a shorter molecular chain and no large molecular groups on the molecular chain. The high molecular film layer formed after the polymerization of the leveling agent has a good synergistic effect with the film layer formed by polymethylhydrogensiloxane and hydroxyl-terminated dimethylhydroxysilicone oil, making the film layer formed by the finishing liquid closer, and thus improving the waterproof performance and wear resistance of the warp-knitted plush fabric.

[0120] The hydrostatic pressure of the warp knitted fleece fabric prepared in Examples 12-13 is lower than that in Examples 1-11, and the weight loss rate is higher than that in Examples 1-11, indicating that the combined use of bentonite, PTFE micropowder and perfluorooctylpropyl acrylate endows the warp knitted fleece fabric with good waterproof performance and wear resistance. This may be because bentonite improves the dispersion performance of PTFE micropowder, and PTFE micropowder enhances the wear resistance of the film layer formed by the finishing solution. The PTFE micropowder and bentonite cooperate with each other to further enhance the waterproof performance and wear resistance of the warp knitted fleece fabric.

[0121] The hydrostatic pressure of the warp knitted fleece fabric prepared in Examples 14-22 is higher than that in Examples 1-13, and the weight loss rate is lower than that in Examples 1-13, indicating that the treatment of the blended covered yarn with the microcapsule impregnating solution before weaving endows the warp knitted fleece fabric with good waterproof performance and wear resistance. This may be due to the slow release effect of the microcapsules. The slowly released n-butyl stearate and hydroxy-terminated dimethyl hydroxy silicone oil are used in combination and migrate to the film layer formed by the finishing solution on the knitted fleece fabric, further improving the waterproof performance and wear resistance of the warp knitted fleece fabric.

[0122] This specific embodiment is only an interpretation of the present application and does not limit the present application. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A method for preparing a warp-knitted fleece fabric, characterized in that, The preparation process is as follows: Preparation of the blended covered yarn: Polyester fibers and reactive fibers with a mass ratio of 1:(0.5 - 1.5) are blended to obtain a polyester blended yarn; then the polyester blended yarn is covered on spandex yarn and processed by false twisting to obtain a blended covered yarn, where the mass ratio of the polyester blended yarn to the spandex yarn is (4 - 6):1; Weaving: The blended covered yarn is woven into a grey cloth, and the warping tension of the blended covered yarn during weaving is 1.4 - 1.8 g / tex; Sanding: One side of the grey cloth is sanded to form plush on the surface of the grey cloth; Finishing: The sanded grey cloth is impregnated with a finishing solution at 60 - 80 °C for 2 - 4 h, and the bath ratio is (8 - 10):1; after impregnation, the finishing solution is drained, heated at a temperature of 150 - 170 °C for 10 - 15 min, and then prepared into a warp knitted fleece fabric after washing, soaping, and drying; The raw materials of the finishing solution include 2 - 5 parts of polymethylhydrosiloxane, 2 - 3 parts of hydroxyl-terminated dimethylhydroxysilicone oil, 0.2 - 0.5 parts of polyether-modified polysiloxane, 4 - 6 parts of alkylphenol polyoxyethylene ether, 0.06 - 0.1 parts of Pt catalyst, and 1000 parts of water; Before weaving, the blended covered yarn is treated with a microcapsule impregnating solution under ultrasonic conditions of 18 - 22 KHz for 4 - 6 h, the bath ratio is 1:(8 - 10), and the temperature of the microcapsule impregnating solution is 65 - 85 °C; The preparation process of the microcapsule impregnating solution: The raw material mixture is heated to 60 - 70 °C and emulsified and stirred at a stirring speed of 4000 - 7000 r / min for 30 - 40 min; 0.1 - 0.3 parts of hydrochloric acid is added, and the reaction is carried out at a temperature of 60 - 70 °C and a reaction stirring speed of 400 - 1000 r / min for 24 - 60 h to prepare the microcapsule impregnating solution; The raw material mixture includes 2 - 4 parts of n-butyl stearate, 1 - 3 parts of sodium dodecyl sulfate, 4 - 8 parts of tetrabutyl titanate, 70 - 76 parts of deionized water, and 35 - 40 parts of ethanol.

2. The preparation method of a warp knitted fleece fabric according to claim 1, characterized in that, The reactive fiber is one of wool, silk, viscose fiber, cotton fiber, hemp fiber, and modal fiber.

3. The preparation method of a warp knitted fleece fabric according to claim 1, characterized in that, In the finishing step, the impregnation treatment includes the first impregnation and the second impregnation. The first impregnation time is 1 - 2 h, the second impregnation time is 1 - 2 h, and the grey cloth is left standing for 8 - 12 min after the first impregnation and then undergoes the second impregnation.

4. The preparation method of a warp-knitted plush fabric according to claim 1, characterized in that, The finishing solution also includes 2 - 6 parts of a leveling agent and 0.06 - 0.1 parts of an initiator. The leveling agent is one of perfluorooctylpropyl acrylate, perfluorocyclohexyl methyl acrylate, and acrylic hydrocarbons.

5. The preparation method of a warp-knitted plush fabric according to claim 4, characterized in that The leveling agent is acrylic hydrocarbons.

6. The preparation method of a warp-knitted plush fabric according to claim 4, characterized in that, The finishing solution also includes 0.4 - 0.8 parts of bentonite and 0.1 - 0.2 parts of PTFE micropowder.

7. The preparation method of a warp knitted fleece fabric according to claim 1, characterized in that: The raw material mixture also includes 3 - 6 parts of hydroxyl-terminated dimethylhydroxysilicone oil.

8. The preparation method of a warp knitted plush fabric according to claim 1, characterized in that: During emulsification, the stirring speed is 5000 - 6000 r / min, the reaction stirring speed is 600 - 700 r / min, the reaction temperature is 63 - 65 °C, and the reaction time is 45 - 50 h.

9. A warp-knitted fleece fabric, characterized in that: Obtained by using the preparation method of the warp knitted plush fabric described in any one of claims 1-8.

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