Preparation method of breathable warm flannel fabric

Abstract

This application relates to the field of fabrics, and more specifically, to a method for preparing a breathable and warm flannel fabric. The method includes the following steps: 1) warp-knitting polyester fiber yarn with a fiber strength of 26-32 cN / dtex and a count of 24-36 onto a base fabric, forming several loose pile loops on both sides of the base fabric, with a warp knitting needle count of 18-22 / 3 cm; 2) cutting the loose pile loops from the top, then brushing and shaping them, forming several pile loops with a height of 3-5 mm on both sides of the base fabric, thus obtaining the flannel fabric. By knitting polyester fiber yarn onto a base fabric, forming several loose pile loops on the base fabric, and controlling the knitting needle count between 18-22 / 3 cm, the pile height is ensured to be 3-5 mm, thereby improving the fabric's softness, warmth, and breathability.

Description

Technical Field

[0001] This application relates to the field of fabrics, and more specifically, to a method for preparing a breathable and warm flannel fabric. Background Technology

[0002] Flannel fabric, a common textile, is widely used in clothing, home furnishings, and other fields, and is favored by consumers for its softness, comfort, and good warmth retention. However, to achieve good warmth retention, traditional flannel fabrics typically require a high weight, resulting in an overly thick and non-breathable fabric that is prone to problems such as pile collapsing during use. These issues limit the application range and user experience of traditional flannel fabrics.

[0003] To overcome the above problems, existing technical solutions mainly focus on the following aspects: First, improving the physical properties of the fabric by adjusting knitting parameters, such as the number of stitches and yarn diameter; second, enhancing the appearance and functionality of the fabric through post-processing techniques, such as setting and dyeing. Specifically, commonly used methods include:

[0004] By controlling the number of stitches and yarn diameter, the structure of the base fabric and yarn can be optimized to maintain softness while improving breathability. For example, using a denser number of stitches can increase the tightness of the base fabric, but at the same time, it will sacrifice some breathability; conversely, a looser number of stitches can improve breathability, but may reduce the warmth retention.

[0005] Post-processing: Post-processing techniques such as setting and dyeing further enhance the physical properties and visual appeal of the fabric. Setting processes use specific chemical reagents and temperature conditions to keep the pile fluffy, improving warmth and breathability; dyeing processes can impart various colors and patterns to the fabric without affecting its performance.

[0006] While the aforementioned methods have improved the performance of traditional flannel fabrics to some extent, some shortcomings remain. In particular, existing technologies often cannot simultaneously achieve both warmth and breathability. High-weight fabrics, while offering better warmth, are too heavy and lack breathability, while low-weight fabrics, although more breathable, offer poor warmth. Furthermore, the problem of the pile easily collapsing has not been effectively solved, causing the fabric to easily lose its original softness and warmth during use. Therefore, developing a flannel fabric that can simultaneously possess good warmth and breathability at a lower weight has become an urgent technical problem to be solved. Summary of the Invention

[0007] The purpose of this application is to provide a method for preparing a breathable and warm flannel fabric that avoids pile collapse while also possessing good breathability and warmth.

[0008] A method for preparing a breathable and warm flannel fabric includes the following steps:

[0009] 1) Warp-knit polyester fiber yarn with a fiber strength of 26-32cN / dtex and a count of 24-36 onto the base fabric, so that several loose pile loops are formed on both sides of the base fabric, with a warp knitting needle count of 18-22 / 3cm.

[0010] 2) Cut the loose loops from the top, then brush and shape them to form several piles with a height of 3-5mm on both sides of the base fabric, thus obtaining flannel fabric.

[0011] Polyester fiber yarn is made from polyester fibers and features high strength, good breathability, good shape retention, strong elastic recovery, and compression resistance, giving flannel fabric excellent softness, compression resistance, warmth, and breathability. Specifically, by controlling the fiber strength of the polyester fiber yarn to 26-32 cN / dtex, the yarn count to 24-36, and the weft knitting needle count to 18-22 / 3cm, a loose pile loop is formed on the base fabric, ensuring a pile height of 3-5mm, thus improving the fabric's softness and warmth. Simultaneously, the finishing process increases the pile's bulkiness, preventing it from collapsing and creating air convection space for ventilation, further enhancing the fabric's breathability. Therefore, this technical solution achieves both good warmth and breathability at a relatively low weight.

[0012] Preferably, the base fabric is prepared by the following method:

[0013] Weft-knit the yarn onto the knitting rope with a weft stitch count of 16-20 / 3cm to obtain the base fabric.

[0014] By adopting the above technical solution, the warp yarn is knitted into the knitting rope with a warp stitch count of 16-20 / 3cm to obtain the base fabric. This gives the base fabric large air pores, and combined with the distribution of the pile, the flannel fabric has good breathability and warmth. At the same time, the base fabric has a stable structure and is not easily deformed or torn.

[0015] Preferably, the diameter of the braided yarn is 50-100D, and the braided rope is 8-12 strands with a diameter of 0.1-0.5mm.

[0016] By adopting the above technical solution, the yarn diameter of the braiding yarn is 50-100D, and the braiding rope is 8-12 strands with a yarn diameter of 0.1-0.5mm. This results in a base fabric with larger air pores, which, combined with the distribution of the pile, gives the flannel fabric good breathability and warmth. At the same time, the selection of these parameters also makes the fabric less prone to deformation and tearing during use, improving the overall performance of the fabric.

[0017] Preferably, the braided yarn is polyester fiber braided yarn, and the braided rope is polyester fiber braided rope.

[0018] Polyester fiber yarn is woven from processed polyester fibers, and similarly, polyester fiber rope is also woven from processed polyester fibers. The selection of polyester fibers gives the yarn and rope superior strength and breathability, combined with a fleece effect, resulting in flannel possessing both excellent breathability and warmth.

[0019] Preferably, the weight of the breathable and warm flannel fabric is 170-210 g / m². 2 The base fabric has a basis weight of 50-80 g / m². 2 .

[0020] By adopting the above technical solution, the basis weight range is 170-210 g / m³. 2 This breathable and warm flannel fabric achieves excellent breathability, warmth, and antistatic properties at a relatively low weight, while maintaining its lightweight characteristics, avoiding the heaviness and lack of breathability associated with higher weight. Furthermore, by combining the selected yarn parameters with the fabric's weight, the resulting flannel possesses superior softness, breathability, and warmth, reducing issues such as sagging during use and improving its practicality.

[0021] Preferably, step 2) further includes a dyeing process, the specific process of which is as follows:

[0022] The loose loops are cut off from the top, then brushed and shaped to obtain the greige fabric. This greige fabric is then soaked in a dyeing agent and dried to form several piles with a height of 3-5mm on the base fabric, resulting in flannel fabric.

[0023] By adopting the above technical solution, the loose loops are cut off from the top, then brushed and shaped to obtain the greige fabric. The resulting fabric is then soaked in a dyeing agent and dried, which makes the flannel fabric not only have better softness, warmth and breathability, but also maintains the pile height of 3-5mm during the dyeing process, ensuring uniform color of the fabric, while improving the fabric's aesthetics and market competitiveness.

[0024] Preferably, the specific process for shaping in step 2) is as follows:

[0025] The loose loops are cut off from the top and then brushed to obtain brushed fabric.

[0026] Setting: Immerse the brushed fabric in a setting agent for 5-10 minutes, remove it, air dry it, heat it to 50-60℃ for 1-5 minutes, then heat it to 150-180℃ for 10-20 seconds, then cool it in water at 5-10℃ and dry it. This will form several piles with a height of 3-5mm on the base fabric, resulting in flannel fabric.

[0027] By employing the above-mentioned technical solution, the loose loops are cut from the top and then brushed to obtain a brushed fabric. The brushed fabric is then immersed in a setting agent for 5-10 minutes, removed, air-dried, heated to 50-60℃ for preheating for 1-5 minutes, then heated to 150-180℃ for setting for 10-20 seconds. It is then cooled in water at 5-10℃ and dried, forming several piles with a height of 3-5mm on the base fabric, resulting in flannel fabric. This process significantly improves the bulkiness of the pile, preventing it from collapsing and creating a certain air convection space for ventilation, thus enhancing the fabric's breathability. Simultaneously, the setting treatment maintains a high pile height and fluffiness, improving the fabric's softness and warmth. Furthermore, the multi-step heating and cooling process ensures the stability and durability of the pile, making the fabric less prone to deformation and tearing during use, or reducing pile collapse on-site.

[0028] Preferably, the setting agent is prepared from the following raw materials in parts by weight:

[0029] 0.1-0.5% monosodium salt of N-(2-hydroxyethyl)-N-(2-ethylhexyl)β-alanine

[0030] 0.1-1% of polyethylene oxide-polypropylene oxide-polyethylene oxide block copolymer

[0031] Double-terminated polydimethylsiloxane 0.3-0.8%

[0032] Octadectopadienoic acid dimer 0.5-1.2%

[0033] 1-2% of polyethylene glycol derivatives

[0034] The remainder is diluent.

[0035] During use, flannel fabric is prone to grease buildup when in contact with oils, which can cause the fibers to collapse and form a lumpy shape, thus reducing its softness, breathability, and warmth.

[0036] To this end, the interaction of N-(2-hydroxyethyl)-N-(2-ethylhexyl)β-alanine monosodium salt, polyethylene oxide-propylene oxide-ethylene oxide block copolymer, double-terminated polydimethylsiloxane, octadecadienoic acid dimer, and polyethylene glycol derivatives, under the action of a catalyst, promotes the formation of a dense protective film on the surface of the pile, etc., enhancing the strength of the pile, effectively preventing stain penetration and adhesion, improving the hand feel, making it softer and smoother, improving lubricity, reducing the coefficient of friction, making the fabric smoother and less prone to static electricity during wear and use. It also avoids the adsorption and deposition of grease and other substances, allowing the pile to maintain optimal bulkiness, thereby achieving better warmth retention, breathability, and antistatic properties.

[0037] Specifically, N-(2-hydroxyethyl)-N-(2-ethylhexyl)β-alanine monosodium salt can form a thin film on the fabric surface, reducing the affinity between stains and fabric fibers, thereby reducing stain adhesion and penetration, while also reducing the accumulation of static electricity. This film does not completely seal the gaps between fabric fibers, but rather improves the breathability of the fabric by adjusting the microstructure of the fabric surface.

[0038] Polyethylene oxide-polypropylene oxide-polyethylene oxide block copolymers possess surface activity, forming a hydrophobic barrier on the fabric surface to reduce stain adhesion and further reduce electrostatic deposition. Double-terminated polydimethylsiloxanes can form hydrogen bonds with fibers and create a thin film on the fiber surface, altering the fiber's surface properties, reducing dirt adhesion to the fabric surface, and making the fabric feel softer and smoother.

[0039] Octadectopadienoic acid dimer can enhance the strength of fabrics, form a protective film, effectively prevent stain penetration and adhesion, improve the feel, making it softer and smoother, increase lubricity, and reduce the coefficient of friction, making the fabric smoother to wear and use and less prone to static electricity. Polyethylene glycol derivatives activate film formation in fabrics, improve flexibility, and have anti-fouling and skin-friendly properties.

[0040] When used in combination, the above components work synergistically to further enhance the overall performance of the fabric. The combined action of N-(2-hydroxyethyl)-N-(2-ethylhexyl)β-alanine monosodium salt and polyethylene oxide-propylene oxide-ethylene oxide block copolymer significantly improves the fabric's stain resistance and antistatic properties while maintaining good breathability. The double-terminated polydimethylsiloxane and octadecadienoic acid dimer enhance the fabric's softness and strength, making it more comfortable and durable during use. The addition of polyethylene glycol derivatives not only further improves the fabric's flexibility and stain resistance but also gives it a better skin-friendly feel. Through their combined effects, this setting agent enables the fabric to possess excellent breathability, warmth, antistatic properties, and stain resistance, significantly improving the overall performance of flannel fabric.

[0041] Preferably, the dual-terminated polydimethylsiloxane is a dihydroxy-terminated polydimethylsiloxane and / or an aminopropyl-terminated polydimethylsiloxane.

[0042] The combined use of dihydroxyl-terminated polydimethylsiloxane and aminopropyl dihydroxyl-terminated polydimethylsiloxane can form a dense and uniform film on the fiber surface, significantly improving the hand feel and smoothness of the fabric, while reducing stain adhesion and penetration, and effectively improving the antistatic properties and breathability of the fabric. However, the combination of the two works synergistically to further enhance the stain resistance, breathability, warmth, and antistatic properties of flannel fabric, while preventing sagging and clumping after long-term use, thus maintaining its optimal bulkiness.

[0043] Preferably, the polyethylene glycol derivative is methoxy polyethylene glycol succinimide carbonate and / or polyethylene glycol diacrylamide.

[0044] When methoxylated polyethylene glycol succinimide carbonate and polyethylene glycol diallylamide are used in combination, the overall performance of flannel fabric is significantly improved. The amide groups in methoxylated polyethylene glycol succinimide carbonate have antistatic properties, while the polyethylene glycol segments have good hydrophilicity, forming a protective film on the fabric surface, reducing direct contact between stains and fabric fibers, and decreasing stain adhesion and penetration. Meanwhile, polyethylene glycol diallylamide, through its polymer properties, further enhances the fabric's flexibility and stain resistance, making it more comfortable to wear and less prone to static electricity and abrasion. The combined use of these two materials not only improves the fabric's stain resistance and antistatic properties but also enhances its breathability and softness, giving flannel fabric both excellent warmth and breathability.

[0045] In summary, this application includes at least one of the following beneficial technical effects:

[0046] 1. This application uses polyester fiber yarn for warp knitting, with yarn parameters selected at a fiber strength of 26-32 cN / dtex and a count of 24-36, which provides good straightness and resistance to deformation. After forming several loose pile loops on the base fabric, the needle count is controlled between 18-22 / 3cm, and the pile height is ensured to be 3-5mm. This results in pile with good bulkiness, softness, and warmth. Since polyester fiber is not prone to collapse, pile collapse can be avoided during use. The setting process keeps the pile fluffy, further reducing the possibility of pile collapse and creating a certain air convection space, thus improving the breathability and warmth of the flannel fabric.

[0047] 2. The base fabric is made by warp knitting woven yarn into woven rope with a stitch count of 16-20 / 3cm, resulting in a base fabric with larger breathable pores. Combined with the height and density of the pile, it achieves the effects of being lightweight, warm and breathable.

[0048] 3. Utilizing the interaction of N-(2-hydroxyethyl)-N-(2-ethylhexyl)β-alanine monosodium salt, polyethylene oxide-propylene oxide-ethylene oxide block copolymer, dimethylsiloxane, octadecadienoic acid dimer, and polyethylene glycol derivatives, and under the action of a catalyst, a dense protective film is formed on the surface of fibers such as pile. This enhances the strength of the pile, effectively prevents stain penetration and adhesion, improves the hand feel, making it softer and smoother, increases lubricity, and reduces the coefficient of friction, making the fabric smoother to wear and less prone to static electricity. It also avoids the adsorption and deposition of grease and other substances, allowing the pile to maintain optimal bulkiness, thereby achieving better warmth retention, breathability, and antistatic properties. Detailed Implementation

[0049] The present application will be further described in detail below with reference to the embodiments.

[0050] Sources of some raw materials:

[0051] The molecular formula of N-(2-hydroxyethyl)-N-(2-ethylhexyl)β-alanine monosodium salt is C. 14 H 25 NNa2O4;

[0052] Polyethylene oxide-polypropylene oxide-polyethylene oxide block copolymer, molecular formula: [C2H4O]n[C3H6O]m[C2H4O]n, where n is 10-12 and m is 10-15;

[0053] The octadecadienoic acid dimer is designated by CAS number 61788-89-4.

[0054] The number average molecular weight of dihydroxyl-terminated polydimethylsiloxane is 500-1000;

[0055] The number average molecular weight of aminopropyl dual-terminated polydimethylsiloxane is 500-1000.

[0056] The number-average molecular weight of methoxy polyethylene glycol succinimide carbonate is 800-1000.

[0057] The number-average molecular weight of polyethylene glycol diacrylamide is 800-1000;

[0058] The catalyst is sodium tungstate dihydrate.

[0059] Example

[0060] Example 1

[0061] A breathable and warm flannel fabric is produced by the following method:

[0062] Base fabric: The weft yarn is knitted into the knitting rope with a weft stitch count of 18 / 3cm, resulting in a weight of 90g / m². 2 The base fabric.

[0063] 1) Warp-knit polyester fiber yarn with a fiber strength of 32cN / dtex and a count of 36 onto the base fabric, so that several loose pile loops are formed on both sides of the base fabric, with a warp knitting needle count of 20 / 3cm.

[0064] 2) Cut the loose loops from the top, brush them, heat to 160℃ for 10 seconds to heat set, and form several piles with an average height of 3.8mm on both sides of the base fabric to obtain flannel fabric.

[0065] The yarn diameter of the braided yarn is 80D, and the braided rope is a 10-strand braid with a yarn diameter of 0.3mm.

[0066] The weight of the breathable and warm flannel fabric is 190g / m². 2 .

[0067] Example 2

[0068] The difference between Example 2 and Example 1 lies in the process parameters, as detailed below:

[0069] The yarn diameter is 100D, the braided cord is a 12-strand braid with a yarn diameter of 0.5mm, and the average pile height is 3mm.

[0070] The weight of the breathable and warm flannel fabric is 170g / m². 2 .

[0071] The weft stitch 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 stitch count is 22 / 3cm.

[0072] Example 3

[0073] The difference between Example 3 and Example 1 lies in the process parameters, as detailed below:

[0074] The yarn diameter for the braid is 50D, and the braided cord is an 8-strand braid with a yarn diameter of 0.1mm. The average height of the pile is 5mm.

[0075] The weight of the breathable and warm flannel fabric is 210g / m². 2 .

[0076] The weft stitch 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 stitch count is 20 / 3cm.

[0077] Example 4

[0078] The difference between Example 4 and Example 1 is that the specific process for shaping in step 2) is as follows:

[0079] Setting agent: Weigh out 0.1% by weight of N-(2-hydroxyethyl)-N-(2-ethylhexyl)β-alanine monosodium salt, 1% of polyethylene oxide-polypropylene oxide-polyethylene oxide block copolymer, 0.3% of dimethylsiloxane, 0.5% of octadecadienoic acid dimer, 2% of polyethylene glycol derivative, and 96.05% of diluent. Place these components in a stirring apparatus and mix thoroughly at 100 rpm to obtain the setting agent. The dimethylsiloxane is a hydroxyl-terminated dimethylsiloxane; the polyethylene glycol derivative is a methoxy polyethylene glycol succinimide carbonate. The diluent is a 45% alcohol solution.

[0080] The loose loops are cut off from the top and then brushed to obtain brushed fabric.

[0081] Setting: Immerse the brushed fabric in a setting agent for 10 minutes, remove it, air dry it, heat it to 50°C for 5 minutes, then heat it to 180°C for 10 seconds to set it, then put it in water at 5°C to cool it to 20°C, remove it and put it in an oven to dry it at 60°C for 10 minutes, forming several piles with an average height of 3.8mm on the base fabric, thus obtaining the flannel fabric.

[0082] Examples 5-6

[0083] The difference between Examples 5-6 and Example 4 lies in the amount of setting agent and the process parameters, as shown in Table 1:

[0084] Table 1. Dosage (%) of the setting agent and process parameters for Examples 4-6

[0085]

[0086] Example 7

[0087] The difference between Example 7 and Example 4 is that the dual-terminated polydimethylsiloxane is aminopropyl dual-terminated polydimethylsiloxane.

[0088] Example 8

[0089] The difference between Example 8 and Example 6 is that the dual-terminated polydimethylsiloxane is composed of dihydroxy-terminated polydimethylsiloxane and aminopropyl dual-terminated polydimethylsiloxane in a weight ratio of 1:1.

[0090] Example 9

[0091] The difference between Example 9 and Example 8 is that the polyethylene glycol derivative is polyethylene glycol diacrylamide.

[0092] Example 10

[0093] The difference between Example 10 and Example 8 is that the polyethylene glycol derivative is composed of methoxy polyethylene glycol succinimide carbonate and polyethylene glycol diacrylamide in a weight ratio of 1:0.3.

[0094] Example 11

[0095] The difference between Example 11 and Example 4 is that the monosodium salt of N-(2-hydroxyethyl)-N-(2-ethylhexyl)β-alanine is replaced in equal amounts with a polyethylene oxide-polypropylene oxide-polyethylene oxide block copolymer.

[0096] Example 12

[0097] The difference between Example 12 and Example 4 is that the polyethylene oxide-polypropylene oxide-polyethylene oxide block copolymer is replaced in equal amounts with N-(2-hydroxyethyl)-N-(2-ethylhexyl)β-alanine monosodium salt.

[0098] Example 13

[0099] The difference between Example 13 and Example 4 is that the double-terminated polydimethylsiloxane is replaced in equal amounts with a polyethylene glycol derivative.

[0100] Example 14

[0101] The difference between Example 14 and Example 4 is that the polyethylene glycol derivative is replaced in equal amounts with double-terminated polydimethylsiloxane.

[0102] Example 15

[0103] The difference between Example 15 and Example 4 is that the octadecadienoic acid dimer is replaced in equal amounts with a polyethylene glycol derivative.

[0104] Example 16

[0105] The difference between Example 16 and Example 4 is that the octadecadienoic acid dimer and the polyethylene glycol derivative are replaced in equal amounts with double-terminated polydimethylsiloxane.

[0106] Comparative Example

[0107] Comparative Example 1

[0108] The difference between Comparative Example 1 and Example 1 is that the pile is 8mm high and the number of stitches is 12 / 3cm.

[0109] Comparative Example 2

[0110] The difference between Comparative Example 2 and Example 1 is that the pile is 1 mm high and the number of stitches is 30 / 3 cm.

[0111] Performance testing

[0112] Detection methods / test methods

[0113] The breathable and warm flannel fabrics obtained in Examples 1-16 and Comparative Examples 1-2 were subjected to the following performance tests;

[0114] Air permeability: Refer to GB / T 5453-1997, where pressure drop: 100Pa, test area: 20cm². 2 Face down.

[0115] Thermal insulation rate: Refer to GB / T 11048-1989 Method A, flat plate type;

[0116] Antistatic properties: Tested according to GB / T 12703.1-2021, with a test temperature of 20.1℃, relative humidity of 38.2%, and electrostatic voltages recorded as 0.0010Kv, 0.0020Kv, and 0.0030Kv respectively.

[0117] Oil stain resistance: The breathable and warm flannel fabrics obtained in Examples 1-16 and Comparative Examples 1-2 were cut into test samples of 30cm*40cm. They were then soaked in artificial sweat for 20 minutes, removed, rinsed in clean water, wrung out, and dried in a 60℃ oven for 2 hours. This process was repeated 20 times. The surface was observed for curling, shedding, etc. Agglomeration and collapse were assessed and categorized as mild, moderate, and severe collapse, as well as mild, moderate, and severe agglomeration. Mild agglomeration was 1-20%, moderate agglomeration was 21-40%, and greater than 40% was severe.

[0118] The artificial sweat solution has a pH of 4.7 and contains 20 g / L squalane, 10 g / L glycerin, 20 g / L sodium chloride, 17.5 g / L ammonium chloride, 5 g / L urea, 2.5 g / L acetic acid, and 15 g / L lactic acid. Sodium hydroxide (NaOH) is then added until the pH of the solution reaches 4.7.

[0119] The experimental records described above are shown in Table 2.

[0120] Table 2. Experimental data of Examples 1-16 and Comparative Examples 1-2

[0121]

[0122]

[0123] Comparing Example 1 and Comparative Examples 1-2 with Table 2, it can be seen that the air permeability of Comparative Example 1 did not change much, but the warmth retention rate decreased significantly. The warmth retention rate of Comparative Example 2 did not change much, but the air permeability decreased significantly. Furthermore, Comparative Examples 1-2 showed collapse, severe agglomeration, and relatively large static electricity. This indicates that the process and process parameters of this application are superior, enabling the flannel fabric to achieve better overall performance.

[0124] Comparing Example 1 and Example 4 and referring to Table 2, it can be seen that the air permeability and heat retention of Example 1 are lower than those of Example 4. The electrostatic voltage of Example 1 is higher than that of Example 4, and the collapse and agglomeration are more severe than those of Example 4. This indicates that the sizing agent obtained by the preparation method of this application and then used in the preparation process of this application can obtain better comprehensive performance.

[0125] Comparing Examples 4 and 11-16 with Table 2, it can be seen that the air permeability and warmth retention of Examples 11-16 are lower than those of Example 4, and the electrostatic voltage of Examples 11-16 is higher than that of Example 4, indicating that collapse and agglomeration are more severe than in Example 4. This shows that the setting agent obtained by using 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, and used in the setting process of this application, achieves better performance. The resulting flannel fabric has better stain resistance, air permeability, warmth retention, and antistatic properties, avoiding collapse and agglomeration after long-term use, and improving its practicality.

[0126] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A method for preparing a breathable and warm flannel fabric, characterized in that, Includes the following steps: 1) Warp-knit polyester fiber yarn with a fiber strength of 26-32cN / dtex and a count of 24-36 onto the base fabric, so that several loose pile loops are formed on both sides of the base fabric, with a warp knitting needle count of 18-22 / 3cm. 2) Cut the loose loops from the top, then brush them to obtain brushed fabric; Setting: Immerse the brushed fabric in the setting agent for 5-10 minutes, remove it, air dry it, heat it to 50-60℃ for 1-5 minutes, then heat it to 150-180℃ for 10-20 seconds, then immerse it in water at 5-10℃ for cooling and drying. This will form several piles with a height of 3-5mm on the base fabric, resulting in flannel fabric. The setting agent is prepared from the following raw materials by weight percentage: 0.1-0.5% monosodium salt of N-(2-hydroxyethyl)-N-(2-ethylhexyl)β-alanine 0.1-1% of polyethylene oxide-propylene oxide-ethylene oxide block copolymer Double-terminated polydimethylsiloxane 0.3-0.8% Octadectopadienoic acid dimer 0.5-1.2% polyethylene glycol derivatives 1-2% Catalyst 0.05-0.1% The remainder is diluent.

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: Weft-knit the yarn onto the knitting rope with a weft stitch count of 16-20 / 3cm to obtain the base fabric.

3. The method for preparing a breathable and warm flannel fabric according to claim 2, characterized in that: The yarn diameter of the braided yarn is 50-100D, and the braided rope is 8-12 strands with a yarn diameter of 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 polyester fiber braided yarn, and the braided rope is 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 this breathable and warm flannel fabric is 170-210 g / m². 2 .

6. The method for preparing a breathable and warm flannel fabric according to claim 1, characterized in that: The dual-terminated polydimethylsiloxane is a dihydroxy-terminated polydimethylsiloxane and / or an aminopropyl-terminated polydimethylsiloxane.

7. 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 succinimide carbonate and / or polyethylene glycol diacrylamide.

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