High-count high-density washable breathable down-proof cloth and preparation method thereof

Abstract

The invention discloses a high-count high-density washable breathable down-proof cloth and a preparation method thereof, and belongs to the technical field of textile fabrics. The down-proof cloth comprises a polyester-cotton blended surface layer and a leakage-proof coating, wherein the polyester-cotton blended surface layer is prepared from polyester-cotton blended yarns through a tatting process; the polyester cotton blended yarn comprises the following components in percentage by weight: 50-70% of polyester fiber and 30-50% of cotton fiber; the leakproof coating is prepared from a down-proof finishing agent through a spraying process; the polyester-cotton blended surface layer is sequentially subjected to cleaning, roll compacting treatment, down-proof finishing agent spraying, drying and sizing, and then the high-count, high-density, washable and breathable down-proof cloth is obtained. The down-proof cloth not only can solve the problems of air permeability and down-proof performance of the conventional down-proof cloth, but also has the advantages of washing resistance and down-proof performance, and also has the advantages of soft hand feeling, good drapability and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of textile fabrics, and particularly relates to a high-count and high-density water-washable, breathable and feather-proof fabric and a preparation method thereof. Background Art

[0002] With the pursuit of high-quality life by modern people, the functional requirements for textile fabrics are getting higher and higher. In products such as outdoor clothing, down jackets, and household items, consumers not only focus on the comfort of the fabric but also particularly pay attention to its breathability, water-washability, and feather-proof property. The feather-proof effect of traditional feather-proof fabrics usually depends on the high-count and high-density structure of the fabric. Due to its characteristics of high count (high fineness of yarn) and high density (tight weaving), this kind of fabric has good warmth retention, lightness, and wear resistance. However, due to the high density of this fabric, the air permeability is often poor, resulting in discomfort for the wearer after sweating during exercise and a poor wearing experience. On the other hand, due to the small characteristics of down, it is quite common for down to pierce through the fabric and appear outside. The phenomenon of down leakage not only affects the beauty of the product but also reduces the warmth retention of the product. In addition, the existing feather-proof fabrics on the market will gradually reduce their feather-proof effect after being washed multiple times, making it difficult to meet the expectations of consumers for the durability of the fabric. Therefore, there is an urgent need to provide a special fabric for down that is water-washable, has good breathability, and strong anti-down-leakage ability to solve the above problems. Summary of the Invention

[0003] One of the purposes of the present invention is to provide a high-count and high-density water-washable, breathable and feather-proof fabric to solve the problems of poor water resistance, poor air permeability, and serious down leakage of the existing feather-proof fabric in the background art;

[0004] Another purpose of the present invention is to provide a preparation method of a high-count and high-density water-washable, breathable and feather-proof fabric.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] In the first aspect, the present invention provides a high-count and high-density water-washable, breathable and feather-proof fabric, which includes a polyester-cotton blended surface layer and a leak-proof coating;

[0007] The polyester-cotton blended surface layer is made of polyester-cotton blended yarn through a weaving process; the count of the polyester-cotton blended yarn is 80 - 100 counts; in the polyester-cotton blended yarn, calculated by percentage content, polyester fiber accounts for 50% - 70%, and cotton fiber accounts for 30% - 50%;

[0008] The leak-proof coating is made of a feather-proof finishing agent through a spraying process; the feather-proof finishing agent, calculated by weight parts, includes the following components:

[0009] 100 parts of polyurethane prepolymer;

[0010] 3 - 5 parts of fluorine - free waterproofing agent;

[0011] 0.02 - 0.04 parts of chain extender;

[0012] 3.8 - 5.2 parts of organosilicon - modified SiO₂;

[0013] 22 - 30 parts of organic solvent.

[0014] As a further solution of the present invention, the preparation method of the polyurethane prepolymer includes the following steps:

[0015] Vacuum - dehydrate the polyester diol and the double - end hydroxyalkyl silicone oil until the water content is < 0.05%, add the diisocyanate and the catalyst, and stir - react at 60 - 80 °C at a speed of 200 - 400 rpm for 3 - 6 h to obtain the polyurethane prepolymer.

[0016] Furthermore, the polyester diol is a bifunctional polyester diol formed by 1,4 - butanediol and adipic acid, with a number - average molecular weight of 1000 - 3000 g / mol; the end - hydroxyalkyl silicone oil is a hydroxyl - terminated polydimethylsiloxane, with a data molecular weight of 1000 - 20000 g / mol;

[0017] The dosage of the double - end hydroxyalkyl silicone oil is 8% - 12% of the dosage of the polyester diol.

[0018] Furthermore, the diisocyanate is any one of toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), and isophorone diisocyanate (IPDI);

[0019] The n(-OH):n(-NCO) of the polyester diol and the diisocyanate is 1:1.5 - 2.5.

[0020] Furthermore, the catalyst is dibutyltin dilaurate (DBTDL);

[0021] The dosage of the catalyst is 0.02% - 0.08% of the dosage of the polyester diol.

[0022] As a further solution of the present invention, the fluorine - free waterproofing agent is any one of fluorine - free waterproofing agent R3 (Huntsman Corporation, USA) or fluorine - free waterproofing agent PM - 3705 (3M Company, USA).

[0023] As a further solution of the present invention, the chain extender is any one of 1,4 - butanediol and ethylenediamine.

[0024] As a further solution of the present invention, the preparation method of the organosilicon - modified SiO₂ includes the following steps:

[0025] Disperse the silane coupling agent in an ethanol / water mixed solvent, adjust the pH to 4-5, then add dry nano-SiO2, and stir and react at 70-80 °C for 4-6 h to obtain organosilicon-modified SiO2.

[0026] Further, the silane coupling agent is any one of KH-550, KH-560, and KH-570;

[0027] The dosage of the silane coupling agent is 6%-9% of the mass of nano-SiO2.

[0028] Further, the volume ratio of ethanol to water in the ethanol / water mixed solvent is 9:1.

[0029] As a further solution of the present invention, in the acetone / xylene mixed solvent, the volume ratio of acetone to xylene is 2:1.

[0030] In a second aspect, the present invention provides a method for preparing a high-count, high-density, washable, breathable, and anti-feather fabric, comprising the following steps:

[0031] Step A: Prepare a polyester-cotton blended surface layer

[0032] Step A1: Respectively make polyester slivers and cotton slivers from polyester fibers and cotton fibers through the processes of bale opening and carding; the polyester slivers and cotton slivers are mixed into a mixed roving through the drawing process, and the polyester-cotton roving made through the roving process is twisted to obtain a polyester-cotton blended yarn;

[0033] Step A2: Weave the polyester-cotton blended yarn by shuttle weaving to obtain a twill fabric with 400-600 warp and weft yarns per square inch; then clean, dry, and calender the twill fabric to obtain the polyester-cotton blended surface layer;

[0034] Step B: Prepare an anti-leakage coating

[0035] Step B1: Add a polyurethane prepolymer, a fluorine-free water repellent, a chain extender, and organosilicon-modified SiO2 to a solvent, and stir and react at a temperature of 70-80 °C for 2-4 h to obtain an anti-feather finishing agent;

[0036] Step B2: Uniformly spray the anti-feather finishing agent on the surface of the fabric, with a spraying thickness of 5-10 μm; then dry and shape to obtain a high-count, high-density, washable, breathable, and anti-feather fabric.

[0037] After the anti-feather finishing agent is sprayed, the fabric needs to be dried to remove excess moisture and form a stable coating of the finishing agent on the fiber surface. The temperature control of the drying process is crucial. If the temperature is too high, the strength of polyester and cotton fibers will be damaged. If it is too low, the finishing agent will not be fully cured, affecting the anti-feather effect. Within a certain temperature range, the moisture in the fabric can evaporate quickly, and the finishing agent can be fully cured to form a stable anti-feather layer. The dried fabric has good anti-feather performance, breathability and washability.

[0038] After drying, the fabric undergoes a shaping process. The purpose of the shaping process is to maintain a stable shape and size of the fabric at high temperature through heating and tension adjustment, avoiding deformation or shrinkage during use or washing. The shaping process is usually carried out in a stentering machine. The fabric is fixed in width and gradually passes through the high-temperature zone. The shaped fabric has good dimensional stability and can maintain a flat and tight organizational structure for a long time, further enhancing the anti-feather performance and durability.

[0039] As a further solution of the present invention, in step A2, the drying temperature is 80 - 120 °C and the time is 2 min; during the rolling process, the pressure of the pressure roller is 800 - 1200 N.

[0040] As a further solution of the present invention, in step B2, the spraying pressure is 0.4 - 0.6 MPa and the spraying speed is 25 - 35 cm / s.

[0041] As a further solution of the present invention, in step B2, the drying temperature is 100 - 130 °C, the drying time is 10 - 15 min; the shaping temperature is 150 - 180 °C, and the shaping time is 30 - 60 s.

[0042] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0043] 1. The present invention provides a high-count and high-density washable and breathable anti-feather fabric, including a surface layer and an anti-leakage coating. By combining polyester and cotton fibers through a polyester-cotton blended yarn, polyester has high strength and wear resistance, while cotton fibers have good breathability and hygroscopicity, endowing the fabric with strength and breathability. In its preparation method, a polyester-cotton blended surface layer with a twill weave is prepared by a weaving process, and an anti-leakage coating is prepared by a spraying process. The weaving process is used to adjust the yarn structure, density and tightness to effectively reduce the risk of down drilling. The anti-leakage coating composed of a polyurethane prepolymer, a waterproofing agent, a chain extender and an organosilicon-modified filler (organosilicon-modified SiO2) effectively seals the gaps between the yarns. This tight surface structure makes it more difficult for down to pass through the fabric, thus reducing the risk of down leakage. The anti-leakage coating also achieves good washability and breathability; at the same time, it also has the advantages of soft hand feeling and good drapability.

[0044] 2. In the process of preparing the polyester-cotton blended yarn of the present invention, cotton fibers are processed through the opening and cleaning and carding processes to prepare cotton fiber sliver; polyester fibers are cut into short polyester fibers, and the short polyester fibers are processed through the opening and cleaning and carding processes to prepare polyester sliver; the cotton fiber sliver and the polyester sliver are mixed into a mixed roving through the drawing process, and the polyester-cotton roving is obtained through the roving process. After twisting, the polyester-cotton blended yarn is obtained. The surface layer is made of the polyester-cotton blended yarn by a weaving method. Polyester fibers have good tensile resistance and wear resistance, which can provide high strength and durability for the fabric, while the addition of cotton fibers can ensure the breathability and comfort of the fabric. The weaving process makes the fibers form a tight interweaving structure in the fabric, improving the durability and anti-feather effect of the fabric. The fabric structure is twill fabric. The number of interweaving times of twill fabric is less than that of plain fabric. Therefore, the yarns in the fabric are arranged more closely, making the anti-feather leakage property better. The obtained fabric needs to be washed to remove impurities such as alkali agents and hydrophilic penetrants that may be contained on the fabric surface to avoid the influence of these impurities on the functional post-treatment. After washing, the fabric surface is completely dried and then subjected to rolling treatment. During the rolling process, the fabric is stressed between the high-pressure rollers, making the fibers arrange more closely. This process can not only improve the tear resistance of the fabric, but also make the subsequent anti-feather finishing agent penetrate more evenly into the fibers, reducing the gaps between warp and weft yarns, facilitating the filling and sealing of the gaps between warp and weft of the fabric by the polymer coating, thereby achieving the anti-feather leakage effect of the fabric. In addition, the rolling process can also adjust the thickness of the fabric by controlling the pressure, further optimizing the anti-feather effect. The fabric surface after washing and rolling treatment is flat and the fibers are close, providing a good basis for the spraying of the anti-feather finishing agent in the next step.

[0045] 3. The anti-feather finishing agent provided by the present invention improves the water repellency of the fabric while filling and sealing the gaps between warp and weft of the surface layer. In the anti-feather finishing, through the organic silicon modified SiO2 filler, uniform dispersion is achieved in the system, and at the same time, the connection stability of the filler in the anti-leakage coating is improved, and a thin and uniform protective film can be formed on the fiber surface to prevent down or other fine substances from penetrating the fabric, but at the same time, it will not affect the breathability and softness of the fabric. The polyurethane prepolymer is prepared from a specific ratio of polyester diol, double-end hydroxyalkyl silicone oil, diisocyanate and catalyst, which is beneficial to further improve the waterproofness of the anti-leakage coating and can further reduce the problem of down agglomeration and running out of down after being wetted. Spraying is carried out by using a continuous spraying device to ensure the uniform distribution of the finishing agent on the fabric surface, avoiding problems such as poor anti-feather effect or poor breathability caused by uneven coating. During the spraying process, the spraying thickness is controlled to make the thickness of both the front and back sides of the polyester-cotton blended surface layer uniform. An overly thick coating will cause the fabric to lose breathability, while an overly thin coating is difficult to ensure the anti-feather effect. Therefore, by controlling the spraying speed and coating thickness, the breathability and comfort of the fabric can be maintained while ensuring the anti-feather effect. Description of the Drawings

[0046] The present invention will be further described below with reference to the accompanying drawings.

[0047] Figure 1 It is a schematic structural diagram of the high-count and high-density washable, breathable and anti-feather fabric in Embodiment 1 of the present invention. Detailed implementation manners

[0048] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0049] Obviously, the following description is only some examples or embodiments of the present application. For those of ordinary skill in the art, the present application can also be applied to other similar scenarios without making creative efforts. In addition, it can also be understood that although the efforts made in this development process may be complex and lengthy, for those of ordinary skill in the art related to the content disclosed in the present application, some design, manufacturing or production changes based on the technical content disclosed in the present application are only conventional technical means and should not be understood as the content disclosed in the present application being insufficient.

[0050] However, there will be cases where unnecessary detailed descriptions are omitted. For example, there are cases where the detailed descriptions of well-known matters are omitted and the repeated descriptions of actually identical structures are omitted. This is to avoid the following description from becoming unnecessarily lengthy and to facilitate the understanding of those skilled in the art. In addition, the following description is provided for those skilled in the art to fully understand the present application and is not intended to limit the subject matter recited in the claims.

[0051] If there is no special description, all the implementation manners and optional implementation manners of the present application can be combined with each other to form new technical solutions, and all the technical features and optional technical features of the present application can be combined with each other to form new technical solutions.

[0052] Preparation Example 1

[0053] This preparation example provides a method for preparing a polyurethane prepolymer, which includes the following steps:

[0054] The bifunctional polyester diol (number average molecular weight of 2000 g / mol) formed from 1,4-butanediol and adipic acid and the hydroxyl-terminated polydimethylsiloxane (number average molecular weight of 10000 g / mol) were dehydrated under vacuum until the water content was <0.05%. The amount of the hydroxyl-terminated polydimethylsiloxane was 10% of the amount of the bifunctional polyester diol. TDI and DBTDL were added to the mixture, where the n(-OH):n(-NCO) of the bifunctional polyester diol to TDI was 1:2; the amount of DBTDL was 0.05% of the amount of the bifunctional polyester diol. The reaction was stirred at 70 °C at a speed of 300 rpm for 4.5 h to obtain a polyurethane prepolymer.

[0055] Preparation Example 2

[0056] This preparation example provides a method for preparing organosilicon-modified SiO2, which includes the following steps:

[0057] KH-570 was dispersed in an ethanol / water mixed solvent (Vethanol:Vwater = 9:1), the pH was adjusted to 4.5, and then dry nano-SiO2 was added. The amount of KH-570 was 8% of the mass of the nano-SiO2. A reaction system with a solid content of 10% was prepared and stirred at 70 °C for 5 h to obtain organosilicon-modified SiO2.

[0058] Example 1

[0059] This example provides a high-count, high-density, washable, breathable and anti-feather fabric. Please refer to Figure 1 , which includes a polyester-cotton blended surface layer and an anti-leakage coating;

[0060] The polyester-cotton blended surface layer is made of polyester-cotton blended yarn through a weaving process; the count of the polyester-cotton blended yarn is 90; in the polyester-cotton blended yarn, by weight percentage, polyester fiber accounts for 60% and cotton fiber accounts for 40%;

[0061] The anti-leakage coating is made of an anti-feather finishing agent through a spraying process; the anti-feather finishing agent, by weight parts, includes the following components:

[0062] 100 parts of the polyurethane prepolymer prepared in Preparation Example 1;

[0063] 4 parts of the fluorine-free water repellent R3 (Huntsman Corporation, USA);

[0064] 0.03 part of 1,4-butanediol;

[0065] 4.5 parts of the organosilicon-modified SiO2 prepared in Preparation Example 2;

[0066] Acetone / xylene mixed solvent (V 丙酮 :V 二甲苯 = 2:1) 28 parts;

[0067] The preparation method of the high-count and high-density washable, breathable and anti-feather fabric comprises the following steps:

[0068] Step A: Prepare the polyester-cotton blended surface layer

[0069] Step A1: Prepare polyester fibers and cotton fibers in proportion. The polyester fibers and cotton fibers are respectively made into polyester slivers and cotton slivers through the processes of bale opening and carding; the polyester slivers and cotton slivers are mixed into a mixed roving through the drawing process, and the polyester-cotton roving made through the roving process is twisted to obtain a polyester-cotton blended yarn with a count of 90s.

[0070] Step A2: Weave the polyester-cotton blended yarn into a twill fabric with a total number of warp and weft yarns of 500 per square inch (unit area); the warp density (the number of warp yarns per square inch) and the weft density (the number of weft yarns per square inch) are respectively not less than 200, and the fibers are closely arranged to improve the density and tear strength of the fabric.

[0071] The woven twill fabric is cleaned to remove surface impurities and residues. After the cleaning is completed, it is dried at 100 °C for 2 min and then rolled by a rolling device to increase the fiber density and the flatness of the fabric. The pressure of the rolling machine is set at 1000 N to ensure the tightness and smoothness of the fabric and enhance its washability.

[0072] Step B: Prepare the leak-proof coating

[0073] Step B1: Prepare the components of the anti-feather finishing agent by weight; add the polyurethane prepolymer prepared in Preparation Example 1, the fluorine-free water repellent R3, 1,4-butanediol, and the organosilicon-modified SiO2 prepared in Preparation Example 2 into the acetone / xylene mixed solvent, and stir and react at a temperature of 70 °C for 3 h to obtain the anti-feather finishing agent.

[0074] Step B2: Fix the polyester-cotton blended surface layer on the spraying device, and spray the anti-feather finishing agent on both the front and back sides. During the spraying process, adjust the pressure and spraying speed of the device nozzle to ensure that the finishing agent evenly covers the fabric surface. The spraying pressure is set at 0.5 MPa, the spraying speed is set at 30 cm / s, and the coating thickness of the anti-feather finishing agent is 8 μm; after spraying, the fabric is sent into a dryer, the drying temperature is set at 120 °C, and the time is controlled at 12 min; after drying, the fabric enters the shaping device, the shaping temperature is 160 °C, and the shaping time is 40 s to obtain the high-count and high-density washable, breathable and anti-feather fabric.

[0075] Example 2

[0076] This example provides a high-count and high-density washable, breathable and anti-feather fabric. The difference from Example 1 is only that in the polyester-cotton blended surface layer, the polyester fibers account for 50% and the cotton fibers account for 50%.

[0077] Example 3

[0078] This example provides a high-count and high-density wash-resistant, breathable and anti-feather fabric. The difference from Example 1 is only that in the polyester-cotton blended surface layer, the polyester fiber accounts for 70% and the cotton fiber accounts for 30%.

[0079] Example 4

[0080] This example provides a high-count and high-density wash-resistant, breathable and anti-feather fabric. The difference from Example 1 is only that the dosage of organosilicon-modified SiO2 is 3.8 parts by weight.

[0081] Example 5

[0082] This example provides a high-count and high-density wash-resistant, breathable and anti-feather fabric. The difference from Example 1 is only that the dosage of organosilicon-modified SiO2 is 5.2 parts by weight.

[0083] Comparative Example 1

[0084] This comparative example provides an anti-feather fabric. The difference from Example 1 is only that the organosilicon-modified SiO2 prepared in Preparation Example 2 is replaced with dry nano-SiO2.

[0085] Comparative Example 2

[0086] This comparative example provides an anti-feather fabric. The difference from Example 1 is only that the anti-feather finishing agent does not contain organosilicon-modified SiO2.

[0087] Comparative Example 3

[0088] This comparative example provides an anti-feather fabric. The difference from Example 1 is only that in the polyester-cotton blended surface layer, the polyester fiber accounts for 80% and the cotton fiber accounts for 20%.

[0089] Comparative Example 4

[0090] This comparative example provides an anti-feather fabric. The difference from Example 1 is only that in the polyester-cotton blended surface layer, the polyester fiber accounts for 40% and the cotton fiber accounts for 60%.

[0091] Comparative Example 5

[0092] This comparative example provides an anti-feather fabric. The difference from Example 1 is that it does not include a leak-proof coating.

[0093] Perform performance tests on the anti-feather fabrics prepared in Examples 1-5 and Comparative Examples 1-5:

[0094] (1) Feather-proof property: Refer to Appendix D "Test Method for Feather-proof Property of Down Garments" in GB / T 14272-2021 for testing;

[0095] (2) Down-proof property: Wash according to the washing procedure in GB / T 8629-2017. The washing procedure is repeated 5 times, 10 times, and 20 times respectively, and observe whether there is down leakage;

[0096] (3) Air permeability: Refer to GB / T 5453-1997 "Textiles - Determination of fabric air permeability";

[0097] (4) Water resistance: Refer to GB / T 4744-2022 "Textiles - Testing and evaluation for water resistance - Hydrostatic pressure method";

[0098] The test results are shown in Table 1 and Table 2.

[0099] Table 1

[0100]

[0101]

[0102] Table 2

[0103] <![CDATA[Air permeability (L / m 2 ·s)]]> <![CDATA[Water pressure resistance (mmH2O)]]> Example 1 5800 11000 Example 2 5400 10700 Example 3 5500 10500 Example 4 5700 10900 Example 5 5800 11300 Comparative Example 1 4700 8200 Comparative Example 2 4200 6900 Comparative Example 3 5100 10500 Comparative Example 4 4900 10600 Comparative Example 5 7400 Not waterproof

[0104] It can be seen from Table 1 and Table 2 that the down-proof fabric prepared by the present invention has excellent anti-down leakage and down-proof properties, good air permeability, and still maintains excellent performance after multiple water washes, and is suitable for making high-end clothing such as down jackets or home textiles.

[0105] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0106] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-count and high-density washable, breathable and feather-proof fabric, characterized in that, It includes a polyester-cotton blended surface layer and a leak-proof coating; The polyester-cotton blended surface layer is made of polyester-cotton blended yarn through a weaving process; the count of the polyester-cotton blended yarn is 80 - 100; in the polyester-cotton blended yarn, by weight percentage, polyester fiber accounts for 50% - 70%, and cotton fiber accounts for 30% - 50%; The leak-proof coating is made of a down-proof finishing agent through a spraying process; the down-proof finishing agent, by weight parts, includes the following components: 100 parts of polyurethane prepolymer; 3 - 5 parts of fluorine-free water repellent; 0.02 - 0.04 parts of chain extender; 3.8 - 5.2 parts of organosilicon-modified SiO₂; 22 - 30 parts of acetone / xylene mixed solvent.

2. The high-count and high-density washable, breathable and anti-feather fabric according to claim 1, wherein The preparation method of the polyurethane prepolymer includes the following steps: Vacuum dehydrate the polyester diol and the double-ended hydroxyalkyl silicone oil until the water content < 0.05%, add diisocyanate and a catalyst, and stir and react at 60 - 80 °C at a rotation speed of 200 - 400 rpm for 3 - 6 h to obtain the polyurethane prepolymer.

3. The high-count and high-density washable, breathable and anti-feather fabric according to claim 2, characterized in that, The polyester diol is a bifunctional polyester diol formed by 1,4-butanediol and adipic acid, with a number average molecular weight of 1000 - 3000 g / mol; the hydroxyalkyl-terminated silicone oil is a hydroxy-terminated polydimethylsiloxane, with a number average molecular weight of 1000 - 20000 g / mol; The dosage of the double-ended hydroxyalkyl silicone oil is 8% - 12% of the dosage of the polyester diol.

4. A high-count and high-density washable, breathable and anti-feather fabric according to claim 2, characterized in that, The diisocyanate is any one of toluene diisocyanate, diphenylmethane diisocyanate, and isophorone diisocyanate; The n(-OH):n(-NCO) of the polyester diol and the diisocyanate is 1:1.5 - 2.

5.

5. A high-count and high-density washable, breathable and anti-feather fabric according to claim 1, characterized in that, The preparation method of the organosilicon-modified SiO₂ includes the following steps: Disperse the silane coupling agent in an ethanol / water mixed solvent, adjust the pH to 4 - 5, then add dry nano-SiO₂, and stir and react at 70 - 80 °C for 4 - 6 h to obtain the organosilicon-modified SiO₂.

6. The high-count and high-density washable, breathable and anti-feather fabric according to claim 5, characterized in that, The silane coupling agent is any one of KH-550, KH-560, and KH-570; The dosage of the silane coupling agent is 6% - 9% of the mass of the nano-SiO₂.

7. A preparation method of a high-count and high-density washable, breathable and anti-feather fabric as described in claim 1, characterized in that, It includes the following steps: Step A: Prepare the polyester-cotton blended surface layer Step A1: Respectively make polyester slivers and cotton slivers from polyester fibers and cotton fibers through the processes of blowing and carding; the polyester slivers and cotton slivers are mixed into a mixed roving through the drawing process, and the polyester-cotton roving made through the roving process is twisted to obtain the polyester-cotton blended yarn; Step A2: Weave the polyester-cotton blended yarn through weaving to obtain a twill fabric with 400 - 600 warp and weft yarns per square inch; then clean, dry, and calender the twill fabric to obtain the polyester-cotton blended surface layer; Step B: Prepare the leak-proof coating Step B1: Add the polyurethane prepolymer, fluorine-free water repellent, chain extender, and organosilicon-modified SiO₂ into the solvent, and stir and react at 70 - 80 °C for 2 - 4 h to obtain the down-proof finishing agent; Step B2: Uniformly spray the down-proof finishing agent on the fabric surface, with a spraying thickness of 5 - 10 μm; then dry and shape to obtain a high-count, high-density, washable, breathable, and down-proof fabric.

8. The preparation method of a high-count and high-density washable, breathable and anti-feather fabric according to claim 7, characterized in that, In step A2, the drying temperature is 80 - 120 °C and the time is 2 min; during the rolling process, the pressure of the pressure roller is 800 - 1200 N.

9. The preparation method of a high-count and high-density washable, breathable and anti-feather fabric according to claim 7, characterized in that, In step B2, the spraying pressure is 0.4 - 0.6 MPa and the spraying speed is 25 - 35 cm / s.

10. The preparation method of a high-count and high-density washable, breathable and feather-proof fabric according to claim 7, characterized in that, In step B2, the drying temperature is 100 - 130 °C and the drying time is 10 - 15 min; the shaping temperature is 150 - 180 °C and the shaping time is 30 - 60 s.

Images