Preparation method of breathable warm-keeping flannel fabric

Abstract

The invention relates to the field of fabrics, in particular to a preparation method of a breathable warm-keeping flannel fabric. Comprising the following steps that 1, polyester fiber knitting wool with the fiber strength being 26-32 cN / dtex and the count being 24-36 is subjected to warp knitting on base cloth, a plurality of loose fluff loops are formed on the two faces of the base cloth, and the warp knitting needle number is 18-22 / 3 cm; and (2) cutting off the loose pile loops from the top, brushing and shaping, and forming a plurality of fluff with the height of 3-5mm on the two surfaces of the base cloth to obtain the flannel fabric. By weaving the polyester fiber knitting wool on the base cloth, a plurality of loose fluff looped piles are formed on the base cloth, and the number of knitting needles is controlled to be 18-22 / 3cm, so that the height of fluff is ensured to be 3-5mm, and the softness, the heat retention property and the air permeability of the fabric are improved.

Description

Technical Field

[0001] The present invention relates to the field of fabrics, and more specifically, to a method for preparing a breathable and warm flannel fabric. Background Art

[0002] Flannel fabric is a common textile widely used in clothing, home furnishing and other fields. It is loved by consumers for its softness, comfort and good warmth retention. However, in order to achieve a good warmth retention effect, traditional flannel fabric usually requires a higher gram weight, which makes the fabric too thick and airtight, and it is easy to cause fluff collapse during use. These problems limit the application scope and user experience of traditional flannel fabric.

[0003] In order to overcome the above problems, existing technical solutions mainly focus on the following aspects: First, by adjusting the knitting parameters, such as the number of knitting needles, wire diameter, etc., to improve the physical properties of the fabric; second, by post-processing processes, such as shaping and dyeing, to improve the appearance and functionality of the fabric. Specifically, the commonly used methods include: By controlling the number of knitting needles and the thread diameter, the structure of the base fabric and the wool yarn is optimized to achieve the goal of maintaining softness and improving breathability. For example, using a denser number of knitting needles can increase the compactness of the base fabric, but at the same time it will sacrifice a certain degree of breathability; conversely, a sparser number of knitting needles can improve breathability, but may reduce the warmth effect.

[0004] Post-processing: Through post-processing processes such as shaping and dyeing, the physical properties and visual effects of the fabric can be further improved. The shaping process can keep the fluff fluffy through specific chemical reagents and temperature conditions, improving warmth retention and breathability; the dyeing process can give the fabric a variety of colors and patterns without affecting the fabric performance.

[0005] Although the above methods have improved the performance of traditional flannel fabrics to a certain extent, there are still some shortcomings. In particular, existing technical means often cannot take into account both warmth retention and breathability at the same time. Although high-weight fabrics have better warmth retention effects, they are too thick and not breathable. Although low-weight fabrics have better breathability, they do not have a good warmth retention effect. In addition, the problem of the easy collapse of the fluff has not been effectively solved, causing the fabric to easily lose its original softness and warmth retention during use. Therefore, developing a flannel fabric that can have good warmth retention and breathability at a lower weight has become a technical problem that needs to be solved urgently. Summary of the invention

[0006] The purpose of this application is to avoid the collapse of the fluff, while having better air permeability and warmth retention, and provide a method for preparing a breathable and warm flannel fabric A method for preparing a breathable and warm flannel fabric comprises the following steps: 1) Warp knitting polyester fiber yarn with a fiber strength of 26-32 cN / dtex and a count of 24-36 on a base fabric to form a plurality of loose pile loops on both sides of the base fabric, with a warp knitting needle count of 18-22 / 3cm; 2) The loose loops are cut off from the top, brushed, and shaped to form a plurality of piles with a height of 3-5 mm on both sides of the base fabric to obtain flannel fabric.

[0007] Polyester fiber yarn is a yarn made from polyester fiber, which has the characteristics of high strength, good air permeability, good shape retention, strong elastic recovery and compression resistance, so that flannel fabric has better softness, compression resistance, warmth retention and air permeability. Specifically, by controlling the fiber strength of polyester fiber yarn to 26-32cN / dtex, the count to 24-36, and the weft knitting needle count to 18-22 / 3cm, loose pile loops are formed on the base fabric, ensuring that the height of the pile is 3-5mm, thereby improving the softness and warmth retention of the fabric. At the same time, the bulkiness of the pile is increased through the shaping process to prevent it from collapsing, forming a certain air convection space, which is convenient for ventilation and further improves the air permeability of the fabric. Therefore, this technical solution achieves the effect of having good warmth retention and breathability at a lower gram weight.

[0008] Preferably, the base fabric is made by the following method: The braiding yarn is weft-knitted into the braiding rope, and the number of weft-knitting needles is 16-20 / 3cm to obtain a base fabric.

[0009] By adopting the above technical solution, the braided yarn is warp-knitted into the braided rope, and the number of warp-knitting needles is 16-20 / 3cm to obtain the base fabric, so that the base fabric has larger air permeability, and with the distribution of the fluff, the flannel fabric has better air permeability and warmth retention. At the same time, the base fabric has a stable structure and is not easy to deform or tear.

[0010] Preferably, the wire diameter of the braided yarn is 50-100D, the braided rope is 8-12 strands, and the wire diameter is 0.1-0.5mm.

[0011] By adopting the above technical solution, the wire diameter of the braided yarn is 50-100D, the braided rope is 8-12 strands, and the wire diameter is 0.1-0.5mm, so that the base fabric has larger air holes, and with the distribution of the fluff, the flannel fabric has better air permeability and warmth retention. At the same time, the selection of these parameters also makes the fabric less likely to deform and tear during use, improving the overall performance of the fabric.

[0012] Preferably, the braided yarn is polyester fiber braided yarn, and the braided rope is polyester braided fiber braided rope.

[0013] Polyester fiber braided yarn is a braided yarn formed by processing polyester fiber. Similarly, polyester fiber braided rope is also a braided rope obtained by processing polyester fiber. The selection of polyester fiber makes its braided yarn and braided rope have better strength and air permeability, combined with the fluff effect. This makes flannel have better air permeability and warmth retention.

[0014] Preferably, the breathable and warm flannel fabric has a gram weight of 170-210 g / m 2 The base fabric weight is 50-80g / m 2 .

[0015] By adopting the above technical solution, the gram weight range is 170-210g / m 2 The breathable and warm flannel fabric can achieve better air permeability, warmth retention and antistatic performance in a lower gram weight, while maintaining the characteristics of lightness, avoiding the heavy feeling and airtightness caused by high gram weight. And under the parameter selection of the wool yarn of the present application, combined with the gram weight of the fabric, the flannel obtained has better softness, air permeability and warmth retention, reduces the problem of collapse during use, and improves its practicality.

[0016] Preferably, the step 2) further includes a dyeing process, and the specific process of step 2) is as follows: The loose terry loops are cut off from the top, brushed and shaped, and the resulting grey cloth is then soaked in a dye and dried to form a number of 3-5mm high piles on the base cloth to obtain flannel fabric.

[0017] By adopting the above technical solution, the loose terry loops are cut off from the top, brushed and shaped, and the obtained grey cloth is then immersed in a dye and dried, so that the flannel fabric not only has better softness, warmth retention and breathability, but also can maintain the height of the terry at 3-5mm during the dyeing process, ensuring the uniform color of the fabric, while improving the aesthetics and market competitiveness of the fabric.

[0018] Preferably, the specific process of shaping in step 2) is as follows: Cut off the loose loops from the top, and then brush the bristles to obtain the brushed fabric; Setting: Soak the brushed grey cloth in the setting agent for 5-10 minutes, take it out, air-dry it, heat it to 50-60℃, preheat it for 1-5 minutes, then heat it to 150-180℃, set it for 10-20 seconds, then put it in 5-10℃ water for cooling, dry it, and form several piles with a height of 3-5mm on the base cloth to obtain flannel fabric.

[0019] By adopting the above technical solution, the loose loops are cut from the top and then brushed to obtain a brushed fleece fabric; then the brushed fleece fabric is placed in a setting agent for 5-10 minutes, taken out, air-dried, heated to 50-60°C, preheated for 1-5 minutes, heated to 150-180°C, set for 10-20 seconds, and then placed in 5-10°C water for cooling and drying to form a number of 3-5mm high fluffs on the base fabric to obtain flannel fabric. This process significantly improves the bulkiness of the fluff, prevents it from collapsing, forms a certain air convection space, facilitates ventilation, and enhances the air permeability of the fabric. At the same time, the setting treatment keeps the fluff at a high height and fluffy state, improving the softness and warmth retention of the fabric. In addition, through multi-step heating and cooling treatment, the stability and durability of the fluff are ensured, making the fabric less likely to deform and tear during use, or reducing the phenomenon of fluff collapse at the scene.

[0020] Preferably, the setting agent is prepared from the following raw materials in parts by weight: N-(2-Hydroxyethyl)-N-(2-ethylhexyl)β-alanine monosodium salt 0.1-0.5% Polyethylene oxide-polypropylene oxide-polyethylene oxide block copolymer 0.1-1% Double-terminated polydimethylsiloxane 0.3-0.8% Octadecadienoic acid dimer 0.5-1.2% Polyethylene glycol derivatives 1-2% The balance is diluent.

[0021] Because flannel fabric is in contact with oil for a long time during use, it is easy for oil to adhere to the fluff, causing the fluff to collapse and form a tuft shape, thereby reducing its softness, breathability and warmth retention.

[0022] To this end, the interaction of N-(2-hydroxyethyl)-N-(2-ethylhexyl)β-alanine monosodium salt, polyethylene oxide-polypropylene oxide-polyethylene oxide block copolymer, double-terminated polydimethylsiloxane, octadecadienoic acid dimer, and polyethylene glycol derivatives is utilized, and under the action of a catalyst, a dense protective film is promoted to form on the surface of the fluff, etc., to enhance the strength of the fluff, effectively prevent stains from penetrating and adhering, improve the hand feel, make it softer and smoother, improve lubricity, reduce the friction coefficient, and make the fabric smoother and less prone to static electricity during wearing and use. Avoid the adsorption and deposition of grease, etc., so that the fluff maintains a better bulkiness, thereby obtaining better warmth retention, air permeability, and antistatic properties.

[0023] Specifically, N-(2-hydroxyethyl)-N-(2-ethylhexyl) beta-alanine monosodium salt can form a thin film on the surface of the fabric, reducing the affinity between stains and fabric fibers, thereby reducing the adhesion and penetration of stains, while reducing the accumulation of static electricity. This film will not completely close the gaps between the fabric fibers, but will improve the air permeability of the fabric by adjusting the microstructure of the fabric surface.

[0024] Polyethylene oxide-polypropylene oxide-polyethylene oxide block copolymer has surface activity and can form a hydrophobic barrier on the fabric surface, reduce the adhesion of stains, and further reduce static electricity deposition. Double-terminated polydimethylsiloxane can form hydrogen bonds with fibers and form a thin film on the fiber surface, changing the surface properties of the fiber, reducing the adhesion of dirt on the fabric surface, and making the fabric feel softer and smoother.

[0025] Octadecadienoic acid dimer can enhance the strength of fabrics, form a protective film, effectively prevent stains from penetrating and adhering, improve the feel, make it softer and smoother, increase lubricity, reduce the friction coefficient, and make the fabric smoother and less prone to static electricity during wearing and use. Polyethylene glycol derivatives activate and form films on fabrics, improve flexibility, and have anti-fouling and skin-friendly properties.

[0026] When the above components are used in combination, they can cooperate with each other to further enhance the overall performance of the fabric. N-(2-hydroxyethyl)-N-(2-ethylhexyl)β-alanine monosodium salt and polyethylene oxide-polypropylene oxide-polyethylene oxide block copolymer work together to significantly improve the antifouling ability and antistatic performance of the fabric while maintaining good air permeability. Double-end-capped polydimethylsiloxane and octadecadienoic acid dimer enhance the softness and strength of the fabric, making the fabric more comfortable and durable during use. The addition of polyethylene glycol derivatives not only further improves the flexibility and antifouling performance of the fabric, but also gives the fabric a better skin-friendly feel. Under the comprehensive effect, the setting agent can make the fabric have excellent air permeability, warmth retention, antistatic and antifouling performance, so that the overall performance of flannel fabric is significantly improved.

[0027] Preferably, the double-terminated polydimethylsiloxane is double-hydroxy-terminated polydimethylsiloxane and / or aminopropyl double-terminated polydimethylsiloxane.

[0028] The compounding of bis-hydroxyl-terminated polydimethylsiloxane and aminopropyl-terminated polydimethylsiloxane can form a dense and uniform film on the fiber surface, significantly improving the feel and smoothness of the fabric, while reducing the adhesion and penetration of stains, and effectively improving the antistatic performance and air permeability of the fabric. However, the compounding of the two plays a synergistic role, further improving the anti-fouling, air permeability, warmth retention and antistatic properties of flannel fabrics, while avoiding collapse and agglomeration after long-term use, so that it maintains a better bulkiness.

[0029] Preferably, the polyethylene glycol derivative is methoxy polyethylene glycol succinimidyl carbonate and / or polyethylene glycol diacrylamide.

[0030] When methoxy polyethylene glycol succinimidyl carbonate and polyethylene glycol diacrylamide are used in combination, the comprehensive performance of flannel fabric can be significantly improved. The amide group in methoxy polyethylene glycol succinimidyl carbonate has an antistatic effect, and the polyethylene glycol chain segment has good hydrophilicity, which can form a protective film on the surface of the fabric, reduce the direct contact between stains and fabric fibers, and reduce the adhesion and penetration of stains. Polyethylene glycol diacrylamide further enhances the flexibility and anti-fouling ability of the fabric through its polymer properties, making it more comfortable and less prone to static electricity and wear during wearing and use. The combination of the two not only improves the anti-fouling and anti-static properties of the fabric, but also enhances the breathability and softness of the fabric, making the flannel fabric have both excellent warmth retention and breathability.

[0031] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present invention selects polyester fiber yarn for warp knitting, and the parameters of the yarn are selected to be 26-32cN / dtex in fiber strength and 24-36 in count, so that the yarn has better straightness and deformation resistance. After forming a number of loose pile loops on the base fabric, the number of needles is controlled between 18-22 / 3cm, and the height of the pile is ensured to be 3-5mm; the obtained pile has better bulkiness, softness and warmth retention. Since polyester fiber is not easy to collapse, the pile collapse can be avoided during use. After the shaping process, the pile is kept fluffy, which further reduces the possibility of the pile collapse, forms a certain air convection space, and improves the air permeability of the breathable and warm flannel fabric. 2. The base fabric is made of woven yarn and warp knitted into a woven rope. The number of knitting needles is 16-20 / 3cm, which gives the base fabric a large air permeability. Combined with the height and density of the fluff, it achieves the effects of light weight, warmth retention and breathability. 3. By utilizing the interaction of N-(2-hydroxyethyl)-N-(2-ethylhexyl)β-alanine monosodium salt, polyethylene oxide-polypropylene oxide-polyethylene oxide block copolymer, double-end polydimethylsiloxane, octadecadienoic acid dimer, and polyethylene glycol derivatives, and under the action of catalysts, a dense protective film is formed on the surface of the fluff, etc., which enhances the strength of the fluff, effectively prevents stains from penetrating and adhering, improves the feel, makes it softer and smoother, improves lubricity, reduces the friction coefficient, and makes the fabric smoother and less prone to static electricity during wearing and use. Avoiding the adsorption and deposition of grease, etc., allows the fluff to maintain a better bulkiness, thereby obtaining better warmth retention, breathability, and antistatic properties. DETAILED DESCRIPTION

[0032] The present application is further described in detail below in conjunction with embodiments.

[0033] Sources of some raw materials: The molecular formula of N-(2-hydroxyethyl)-N-(2-ethylhexyl)β-alanine monosodium salt is C 14 H 25 NNa2O4; Polyethylene oxide-polypropylene oxide-polyethylene oxide block copolymer, molecular formula: [C2H4O]n[C3H6O]m[C2H4O]n, wherein n is 10-12 and m is 10-15; Octadecadienoic acid dimer is CAS No. 61788-89-4; The number average molecular weight of the dihydroxy-terminated polydimethylsiloxane is 500-1000; The number average molecular weight of aminopropyl dicapped polydimethylsiloxane is 500-1000; The number average molecular weight of methoxy polyethylene glycol succinimidyl carbonate is 800-1000; The number average molecular weight of polyethylene glycol diacrylamide is 800-1000; The catalyst is sodium tungstate dihydrate. Example

[0034] Example 1 A breathable and warm flannel fabric is prepared by the following method: Base fabric: Weft knit the braided yarn into the braided rope, the weft knitting needle number is 18 / 3cm, and the weight is 90g / m 2 Base fabric.

[0035] 1) Warp knitting polyester fiber yarn with a fiber strength of 32 cN / dtex and a count of 36 on a base fabric to form a number of loose pile loops on both sides of the base fabric, with a warp knitting needle count of 20 / 3 cm; 2) The loose loops are cut off from the top, brushed, heated to 160° C. for heat setting for 10 seconds, and a plurality of piles with an average height of 3.8 mm are formed on both sides of the base fabric to obtain a flannel fabric.

[0036] The wire diameter of the braided yarn is 80D, the braided rope is 10 strands, and the wire diameter is 0.3mm.

[0037] The weight of breathable and warm flannel fabric is 190g / m 2 .

[0038] Example 2 The difference between Example 2 and Example 1 is that the process parameters are different, as follows: The wire diameter of the braided yarn is 100D, the braided rope is 12 strands, the wire diameter is 0.5mm, and the average height of the pile is 3mm.

[0039] The weight of breathable and warm flannel fabric is 170g / m 2 .

[0040] The weft knitting needle count of the braided rope is 16 / 3cm; the fiber strength of the polyester fiber yarn is 28cN / dtex and the count is 32; the warp knitting needle count is 22 / 3cm.

[0041] Example 3 The difference between Example 3 and Example 1 is that the process parameters are different, as follows: The wire diameter of the braided yarn is 50D, the braided rope is 8-strand braid, the wire diameter is 0.1mm, and the average height of the pile is 5mm.

[0042] The weight of breathable and warm flannel fabric is 210g / m 2 .

[0043] The weft knitting needle count of the braided rope is 20 / 3cm; the fiber strength of the polyester fiber yarn is 26cN / dtex and the count is 24; the warp knitting needle count is 20 / 3cm.

[0044] Example 4 The difference between Example 4 and Example 1 is that the specific process of shaping in step 2) is as follows: Fixing agent: According to the weight percentage, weigh 0.1% of N-(2-hydroxyethyl)-N-(2-ethylhexyl)β-alanine monosodium salt, 1% of polyethylene oxide-polypropylene oxide-polyethylene oxide block copolymer, 0.3% of double-end-capped polydimethylsiloxane, 0.5% of octadecadienoic acid dimer, 2% of polyethylene glycol derivative and 96.05% of diluent, put them into a stirring device, and mix them evenly at a speed of 100r / min to obtain a fixing agent, wherein the double-end-capped polydimethylsiloxane is double hydroxy-end-capped polydimethylsiloxane; the polyethylene glycol derivative is methoxy polyethylene glycol succinimide carbonate. The diluent is a 45% alcohol solution by mass.

[0045] Cut off the loose loops from the top, and then brush the bristles to obtain the brushed fabric; Setting: Soak the brushed grey cloth in the setting agent for 10 minutes, take it out, air-dry it, heat it to 50°C, preheat it for 5 minutes, then heat it to 180°C, set it for 10 seconds, then put it in 5°C water to cool it to 20°C, take it out and put it in an oven, dry it at 60°C for 10 minutes, form a number of fluffs with an average height of 3.8 mm on the base cloth, and obtain flannel fabric.

[0046] Embodiment 5-6 The difference between Example 5-6 and Example 4 is that the amount of setting agent and process parameters are different, as shown in Table 1: Table 1 Amount (%) of setting agent and process parameters of Examples 4-6 Example 7 The difference between Example 7 and Example 4 is that the double-terminated polydimethylsiloxane is aminopropyl double-terminated polydimethylsiloxane.

[0047] Example 8 The difference between Example 8 and Example 6 is that the double-terminated polydimethylsiloxane is composed of double-hydroxy-terminated polydimethylsiloxane and aminopropyl double-terminated polydimethylsiloxane in a weight ratio of 1:1.

[0048] Example 9 The difference between Example 9 and Example 8 is that the polyethylene glycol derivative is polyethylene glycol diacrylamide.

[0049] Example 10 The difference between Example 10 and Example 8 is that the polyethylene glycol derivative is composed of methoxy polyethylene glycol succinimidyl carbonate and polyethylene glycol diacrylamide in a weight ratio of 1:0.3.

[0050] Embodiment 11 The difference between Example 11 and Example 4 is that an equal amount of N-(2-hydroxyethyl)-N-(2-ethylhexyl)β-alanine monosodium salt is replaced by a polyethylene oxide-polypropylene oxide-polyethylene oxide block copolymer.

[0051] Example 12 The difference between Example 12 and Example 4 is that the polyethylene oxide-polypropylene oxide-polyethylene oxide block copolymer is replaced by an equal amount of N-(2-hydroxyethyl)-N-(2-ethylhexyl)β-alanine monosodium salt.

[0052] Example 13 The difference between Example 13 and Example 4 is that the double-terminated polydimethylsiloxane is replaced by an equal amount of polyethylene glycol derivatives.

[0053] Embodiment 14 The difference between Example 14 and Example 4 is that the polyethylene glycol derivative is replaced by di-terminated polydimethylsiloxane in equal amounts.

[0054] Embodiment 15 The difference between Example 15 and Example 4 is that the octadecadienoic acid dimer is replaced by an equal amount of a polyethylene glycol derivative.

[0055] Example 16 The difference between Example 16 and Example 4 is that the octadecadienoic acid dimer and the polyethylene glycol derivative are replaced by di-terminated polydimethylsiloxane in equal amounts.

[0056] Comparative Example Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that the height of the fluff is 8 mm and the number of knitting needles is 12 / 3 cm.

[0057] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that the height of the fluff is 1 mm and the number of knitting needles is 30 / 3 cm.

[0058] Performance testing Detection method / test method The breathable and warm flannel fabrics obtained in Examples 1-16 and Comparative Examples 1-2 were subjected to the following performance tests: Air permeability: Refer to GB / T 5453-1997, where pressure drop: 100Pa, test area: 20cm 2 , face down.

[0059] Insulation rate: Refer to GB / T 11048-1989 Method A Flat Plate; Antistatic: Tested in accordance with GB / T 12703.1-2021, with a test temperature of 20.1°C, relative humidity of 38.2%, and electrostatic voltages of 0.0010Kv, 0.0020Kv, and 0.0030Kv, respectively.

[0060] Oil stain resistance: The breathable and warm flannel fabrics obtained in Examples 1-16 and Comparative Examples 1-2 were cut into 30cm*40cm test samples. Then, they were soaked in artificial sweat for 20 minutes, taken out, rinsed in clean water, wrung out, and dried in an oven at 60°C for 2 hours. The above process was repeated 20 times. The surface was observed for curling, hair loss, etc., and the aggregation and collapse were evaluated, which were divided into mild collapse, moderate collapse, and high collapse, mild aggregation, moderate aggregation, and high aggregation; mild is 1-20%, moderate is 21-40%, and more than 40% is severe.

[0061] Among them, the pH value of artificial sweat is 4.7, which contains 20g / L squalane, 10g / L glycerol, 20g / L sodium chloride, 17.5g / L ammonium chloride, 5g / L urea, 2.5g / L acetic acid, 15g / L lactic acid, and then sodium hydroxide NaOH is added until the pH value of the solution reaches 4.7.

[0062] The above experimental records are shown in Table 2. Table 2 Experimental data of Examples 1-16 and Comparative Examples 1-2 By comparing Example 1 and Comparative Example 1-2 and combining them with Table 2, it can be seen that the air permeability of Comparative Example 1 does not change much, while the warmth retention rate is significantly reduced, the warmth retention rate of Comparative Example 2 does not change much, while the air permeability is significantly reduced, and Comparative Example 1-2 collapses, agglomerates more seriously, and generates relatively large static electricity, indicating that the process and process parameters of the present application are better, so that the flannel fabric has better comprehensive performance.

[0063] By comparing Example 1 and Example 4 and combining with Table 2, it can be seen that the air permeability and warmth retention rate of Example 1 are lower than those of Example 4, the electrostatic voltage of Example 1 is larger than that of Example 4, collapse occurs, and the agglomeration is more serious than that of Example 4, indicating that the setting agent obtained by the preparation method of the present application is used in the preparation process of the present application to obtain better comprehensive performance.

[0064] By comparing Example 4 with Example 11-16 and combining with Table 2, it can be seen that the air permeability and warmth retention rate of Example 11-16 are lower than those of Example 4, and the electrostatic voltage of Example 11-16 is larger than that of Example 4, and collapse and agglomeration are more serious than that of Example 4. This shows that the setting agent is obtained by N-(2-hydroxyethyl)-N-(2-ethylhexyl)β-alanine monosodium salt, polyethylene oxide-polypropylene oxide-polyethylene oxide block copolymer, double-terminated polydimethylsiloxane, octadecadienoic acid dimer, and polyethylene glycol derivative, and is used in the setting process of the present application to obtain better performance, so that the obtained flannel fabric has better anti-fouling, air permeability, warmth retention and antistatic properties, avoids collapse, agglomeration and the like after long-term use, and improves its practicality.

[0065] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A method for preparing a breathable and warm flannel fabric, characterized in that: The following steps are involved: 1) Warp knit the polyester fiber yarn with a fiber strength of 26-32cN / dtex and a count of 24-36 on the base fabric, so that a number of loose pile loops are formed on both sides of the base fabric, and the number of warp knitting needles is 18-22 / 3cm; 2) Cut off the loose loops from the top, brush and shape them, and form a number of piles with a height of 3-5mm on both sides of the base fabric to obtain flannel fabric.

2. The method for preparing a breathable and warm flannel fabric according to claim 1, characterized in that: The base fabric is prepared by the following method: The braiding yarn is weft-knitted into the braiding rope, and the number of weft-knitting needles is 16-20 / 3cm to obtain a base fabric.

3. The method for preparing a breathable and warm flannel fabric according to claim 2, characterized in that: The wire diameter of the braided yarn is 50-100D, the braided rope is 8-12 strands, and the wire diameter is 0.1-0.5mm.

4. The method for preparing a breathable and warm flannel fabric according to claim 2, characterized in that: The braided yarn is a polyester fiber braided yarn, and the braided rope is a polyester fiber braided rope.

5. The method for preparing a breathable and warm flannel fabric according to claim 1, characterized in that: The weight of the breathable and warm flannel fabric is 170-210 g / m 2 .

6. The method for preparing a breathable and warm flannel fabric according to claim 1, characterized in that: The step 2) also includes a dyeing process, and the specific process of step 2) is as follows: The loose terry loops are cut off from the top, brushed and shaped, and the resulting grey cloth is then soaked in a dye and dried to form a number of 3-5mm high piles on the base cloth to obtain flannel fabric.

7. The method for preparing a breathable and warm flannel fabric according to claim 1, characterized in that; The specific process of shaping in step 2) is as follows: Cut off the loose loops from the top, and then brush the bristles to obtain the brushed fabric; Setting: soak the brushed grey cloth in a setting agent for 5-10 minutes, take it out, air-dry it, heat it to 50-60°C, preheat it for 1-5 minutes, heat it to 150-180°C, set it for 10-20 seconds, put it in 5-10°C water for cooling, dry it, and form a number of fluffs with a height of 3-5mm on the base cloth to obtain flannel fabric.

8. The method for preparing a breathable and warm flannel fabric according to claim 1, characterized in that: The setting agent is prepared from the following raw materials in parts by weight: N-(2-Hydroxyethyl)-N-(2-ethylhexyl)β-alanine monosodium salt 0.1-0.5% Polyethylene oxide-polypropylene oxide-polyethylene oxide block copolymer 0.1-1% Double-terminated polydimethylsiloxane 0.3-0.8% Octadecadienoic acid dimer 0.5-1.2% Polyethylene glycol derivatives 1-2% Catalyst 0.05-0.1% The balance is diluent.

9. The method for preparing a breathable and warm flannel fabric according to claim 1, characterized in that: The double-terminated polydimethylsiloxane is double-hydroxy-terminated polydimethylsiloxane and / or aminopropyl double-terminated polydimethylsiloxane.

10. The method for preparing a breathable and warm flannel fabric according to claim 1, characterized in that: The polyethylene glycol derivative is methoxy polyethylene glycol succinimidyl carbonate and / or polyethylene glycol diacrylamide.

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