Down jacket fabric with anti-down drape and its preparation method and application

Abstract

The present invention discloses a down jacket face fabric with anti-down drape, and its preparation method and application, and relates to the field of fabrics. Among them, a down jacket face fabric with anti-down drape comprises an intermediate breathable layer and anti-down layers located on both sides of the intermediate breathable layer; the anti-down layer comprises a nylon surface layer and a leak-proof coating; the nylon surface layer is made of nylon fiber using a woven method, wherein the number of warp yarns per square inch of the nylon surface layer is 110-128, and the number of weft yarns is 68-90; the leak-proof coating comprises a polyurethane prepolymer, an isocyanate, a chain extender, a silicone modified filler, and a solvent in a weight ratio of 100: (4-6): (0.02-0.05): (3.5-4.8): (25-33). The down jacket face fabric with anti-down drape in this application has the advantages of good anti-down performance, good wrinkle resistance and drape, good air permeability and waterproofness.

Description

Technical Field

[0001] The invention relates to the field of fabrics, in particular to a down jacket surface fabric with anti-down drape, and a preparation method and application thereof. Background Art

[0002] Down jackets are textile products filled with natural down. They are lightweight, soft, fluffy, and comfortable, making them excellent winter warmth and protection. However, the outer fabric of down jackets currently used in related technologies is typically nylon. However, single nylon outer fabrics are prone to down leakage. Furthermore, single nylon outer fabrics have poor wrinkle resistance and drape, which can degrade the consumer experience. Summary of the Invention

[0003] In order to improve the problems in the related art that down jacket surface fabrics are prone to down penetration and have poor wrinkle resistance, the present application provides a down jacket surface fabric with anti-down penetration and drape, as well as a preparation method and application thereof.

[0004] In the first aspect, the present application provides a down jacket fabric with anti-down drape, which adopts the following technical solutions:

[0005] A down jacket face fabric with anti-down drape, comprising a middle breathable layer and anti-down layers located on both sides of the middle breathable layer; wherein the anti-down layers comprise a nylon surface layer and a leak-proof coating;

[0006] The nylon surface layer is made of nylon fibers using a woven method, wherein the number of warp yarns per square inch of the nylon surface layer is 110-128, and the number of weft yarns per square inch is 68-90;

[0007] The leak-proof coating comprises a polyurethane prepolymer, an isocyanate, a chain extender, an organosilicon-modified filler and a solvent;

[0008] The weight ratio of the polyurethane prepolymer, isocyanate, chain extender, organosilicon modified filler and solvent is 100:(4-6):(0.02-0.05):(3.5-4.8):(25-33).

[0009] The down jacket fabric of the present application comprises at least five layers, namely, a nylon surface layer, an anti-leakage coating, an intermediate breathable layer, an anti-leakage coating, and a nylon surface layer. The nylon surface layer has 110-128 warp yarns per square inch and 68-90 weft yarns per square inch. This density range allows for both breathability and down-proofing of the down jacket fabric. The weight ratio of the polyurethane prepolymer, isocyanate, chain extender, organosilicon-modified filler, and solvent in the anti-leakage coating of the down jacket fabric is 100:(4-8):(0.02-0.05):(3.5-4.8):(25-33). This improves the wrinkle resistance and drape of the down jacket fabric and, in conjunction with the intermediate breathable layer, improves the resilience of the anti-leakage coating, thereby enhancing the down jacket fabric's down-proofing stability. In addition, in this application, the middle breathable layer is made of waterproof and breathable material. The down jacket surface fabric has the characteristics of good waterproof and breathable properties, which is conducive to the production of down jackets with good breathability and not easy to lose down, thereby improving wearing comfort.

[0010] Optionally, the middle breathable layer is made of at least one of PTFE film, PU film or TPU film.

[0011] Optionally, the polyurethane prepolymer includes polyester diol, dihydroxyalkyl silicone oil, diisocyanate and catalyst, and the weight ratio of the polyester diol, dihydroxyalkyl silicone oil, diisocyanate and catalyst is (68-82): (8-12): (33-42): (0.2-0.4).

[0012] In the leak-proof coating of the present application, the polyurethane prepolymer is prepared by using a specific ratio of polyester diol, double-ended hydroxyalkyl silicone oil, diisocyanate and catalyst, which is beneficial to further improve the waterproofness of the leak-proof coating and can further reduce the problem of down agglomeration and running after contacting water.

[0013] Optionally, the preparation method of the polyurethane prepolymer is as follows:

[0014] After uniformly mixing polyester diol and double-terminated hydroxyalkyl silicone oil, the temperature is raised to 98-105°C for vacuum dehydration, then the temperature is lowered to 55-65°C, diisocyanate and catalyst are added, stirred and mixed, and the temperature is raised to 75-85°C for reaction for 2-3 hours to obtain a polyurethane prepolymer.

[0015] Optionally, the molecular weight of the polyester diol is 2000-3000.

[0016] When the molecular weight of the polyester diol used in the polyurethane prepolymer in the leak-proof coating of the present application is 2000-3000, it is beneficial to further improve the anti-down drilling stability of the down jacket surface fabric.

[0017] Optionally, the viscosity of the double-terminal hydroxyalkyl silicone oil is 20-40 cst.

[0018] When the viscosity of the double-terminal hydroxyalkyl silicone oil used in the polyurethane prepolymer in the leak-proof coating of the present application is 20-40 cst, it is beneficial to further improve the anti-down running property of the down jacket surface fabric.

[0019] Optionally, the diisocyanate is at least one of diphenylmethane diisocyanate, isophorone diisocyanate, and toluene-2,4-diisocyanate; and the catalyst is an organic metal catalyst.

[0020] Optionally, the organosilicon-modified filler is a filler modified with an aminosilane coupling agent.

[0021] In the present application, the organosilicon modified filler is modified with an aminosilane coupling agent, which can improve the uniform dispersion performance of the modified filler while improving the connection stability of the modified filler in the leak-proof coating, which is beneficial to improving the stability of the drape of the down jacket surface fabric.

[0022] Optionally, the aminosilane coupling agent modified filler is at least one of aminosilane coupling agent modified glass fiber and aminosilane coupling agent modified hollow glass microspheres.

[0023] In the present application, the filler in the organosilicon-modified filler is preferably at least one of aminosilane coupling agent-modified glass fiber and aminosilane coupling agent-modified hollow glass microspheres, wherein both glass fiber and hollow glass microspheres have the characteristics of low thermal conductivity, which can help improve the warmth retention effect of the down jacket fabric.

[0024] Optionally, the filler includes aminosilane coupling agent modified glass fiber and aminosilane coupling agent modified hollow glass microspheres, and the weight ratio of the aminosilane coupling agent modified glass fiber to the aminosilane coupling agent modified hollow glass microspheres is 1:(1-1.5).

[0025] In the leak-proof coating of the present application, the filler in the organosilicon-modified filler is further preferably a composition of aminosilane coupling agent-modified glass fiber and aminosilane coupling agent-modified hollow glass microbeads in a weight ratio of 1:(1-1.5), wherein the aminosilane coupling agent-modified glass fiber can improve the tensile strength of the leak-proof coating, and the aminosilane coupling agent-modified hollow glass microbeads can play a lubricating role, which can improve the dispersibility of the organosilicon-modified filler, which is beneficial to further improve the anti-down drilling stability of the down jacket surface fabric while improving the drape of the down jacket surface fabric.

[0026] In a second aspect, the present application provides a method for preparing a down jacket fabric with an anti-down drape feel, which adopts the following technical solution:

[0027] A method for preparing a down jacket surface fabric with anti-down drape, comprising the following steps:

[0028] The polyurethane prepolymer, isocyanate, chain extender and silicone modified filler are uniformly mixed, and then the temperature is raised to 75-85°C for reaction for 4-5 hours, followed by adding solvent and stirring to disperse uniformly to obtain a leak-proof coating;

[0029] A leak-proof coating is applied on one side of the nylon surface layer to obtain an anti-drilling fleece layer;

[0030] A middle breathable layer is compounded on the side of one of the anti-drilling fleece layers facing away from the nylon surface layer;

[0031] Another anti-down drilling layer is compounded on the middle breathable layer, wherein the nylon surface layer of the anti-down drilling layer is located on the side away from the middle breathable layer, thereby obtaining a down jacket surface fabric with anti-down drilling and drape.

[0032] In a third aspect, the present application provides a down jacket that adopts the following technical solutions:

[0033] A down jacket comprises any one of the above-mentioned down jacket surface fabrics with anti-down drape.

[0034] The down jacket of the present application has the advantages of good down-proofing and down-running-proofing effects, good waterproofness and breathability, and good wrinkle resistance and drape.

[0035] In summary, this application has at least the following beneficial technical effects:

[0036] (1) The down jacket fabric of the present application comprises at least five layers, namely, a nylon surface layer, an anti-leakage coating, an intermediate breathable layer, an anti-leakage coating, and a nylon surface layer. The number of warp yarns per square inch of the nylon surface layer is 110-128, and the number of weft yarns is 68-90. This density range can take into account both the breathability and down-proofing properties of the down jacket fabric. The weight ratio of the polyurethane prepolymer, isocyanate, chain extender, organosilicon modified filler, and solvent in the anti-leakage coating of the down jacket fabric is 100:(4-8):(0.02-0.05):(3.5-4.8):(25-33). On the one hand, this can improve the anti-wrinkle effect of the down jacket fabric and enhance the drape. On the other hand, it can also work together with the intermediate breathable layer to improve the rebound performance of the anti-leakage coating, which is beneficial to improving the down jacket fabric's down-proofing stability. In addition, in this application, the middle breathable layer is made of waterproof and breathable material. The down jacket surface fabric has the characteristics of good waterproof and breathable properties, which is conducive to the production of down jackets with good breathability and not easy to lose down, thereby improving wearing comfort.

[0037] (2) In the leak-proof coating of the present application, the polyurethane prepolymer is prepared by using a specific ratio of polyester diol, double-terminated hydroxyalkyl silicone oil, diisocyanate and catalyst, which is beneficial to further improve the waterproofness of the leak-proof coating and can further reduce the problem of down agglomeration and down running after contacting water.

[0038] (3) In the leak-proof coating of the present application, the filler in the organosilicon-modified filler is further preferably a composition of aminosilane coupling agent-modified glass fiber and aminosilane coupling agent-modified hollow glass microspheres in a weight ratio of 1:(1-1.5), wherein the aminosilane coupling agent-modified glass fiber can improve the tensile strength of the leak-proof coating, and the aminosilane coupling agent-modified hollow glass microspheres can play a lubricating role, which can improve the dispersibility of the organosilicon-modified filler, and is beneficial to further improve the anti-down drilling stability of the down jacket surface fabric while improving the drape of the down jacket surface fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic structural diagram of a down jacket face fabric with anti-down drape in the present application.

[0040] Description of reference numerals:

[0041] 1. Anti-drilling fleece layer; 11. Nylon surface layer; 12. Leak-proof coating; 2. Middle breathable layer. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1 This application is described in further detail.

[0043] Example

[0044] [Example 1]

[0045] A down jacket face fabric with anti-down drilling and drape comprises a middle breathable layer 2 and anti-down drilling layers 1 located on both sides of the middle breathable layer 2. The anti-down drilling layer 1 comprises a nylon surface layer 11 and an anti-leakage coating 12. The anti-leakage coating 12 is adjacent to the middle breathable layer 2.

[0046] The nylon surface layer 11 is made of nylon fibers 66 by a woven method. The number of warp yarns per square inch of the nylon surface layer 11 is 110, and the number of weft yarns per square inch is 68.

[0047] The leak-proof coating 12 comprises the following raw materials:

[0048] Polyurethane prepolymer: 100 kg; in this embodiment, the polyurethane prepolymer is prepared from polyester diol, diisocyanate, and catalyst in a weight ratio of 68:33:0.2; wherein the polyester diol is specifically a polycarbonate diol with a molecular weight of 2000, the diisocyanate is specifically diphenylmethane diisocyanate, and the catalyst is specifically dibutyltin dilaurate;

[0049] Isocyanate: 4 kg; in this embodiment, the isocyanate is specifically isophorone diisocyanate;

[0050] Chain extender: 0.02 kg; in this embodiment, the chain extender is specifically ethylene glycol;

[0051] Organosilicon modified filler: 3.5 kg; in this embodiment, the organosilicon modified filler is specifically glass fiber modified with silane coupling agent KH550;

[0052] Solvent: 25 kg; in this embodiment, the solvent is specifically water.

[0053] The preparation method of the leak-proof coating 12 comprises the following steps:

[0054] The polyester diol was heated to 98°C for vacuum dehydration, then cooled to 55°C, diisocyanate and catalyst were added, stirred and mixed, and heated to 75°C for reaction for 3 hours to obtain a polyurethane prepolymer;

[0055] The polyurethane prepolymer, isocyanate, chain extender and organosilicon modified filler are uniformly mixed, and then heated to 85° C. to react for 4 hours. Then, a solvent is added and stirred to disperse uniformly to obtain a leak-proof coating 12.

[0056] The middle breathable layer specifically adopts TPU film.

[0057] In addition, in this embodiment, the method for preparing the down jacket surface fabric with anti-down drape includes the following steps:

[0058] A leak-proof coating 12 is applied on one side of the nylon surface layer 11 to obtain an anti-drilling fleece layer 1;

[0059] A middle breathable layer 2 is compounded on one side of the anti-drilling fleece layer 1 facing away from the nylon surface layer 11;

[0060] Another anti-down drilling layer 1 is compounded on the middle breathable layer 2, wherein the anti-down drilling layer 1 has its anti-leakage coating 12 adjacent to the middle breathable layer 2, thereby obtaining a down jacket surface fabric with an anti-down drilling drape.

[0061] [Example 2]

[0062] A down jacket face fabric with anti-down drilling and drape comprises a middle breathable layer 2 and anti-down drilling layers 1 located on both sides of the middle breathable layer 2. The anti-down drilling layer 1 comprises a nylon surface layer 11 and an anti-leakage coating 12. The anti-leakage coating 12 is adjacent to the middle breathable layer 2.

[0063] The nylon surface layer 11 is made of nylon fibers 6 by a woven method. The number of warp yarns per square inch of the nylon surface layer 11 is 128, and the number of weft yarns per square inch is 90.

[0064] The leak-proof coating 12 comprises the following raw materials:

[0065] Polyurethane prepolymer: 100 kg; in this embodiment, the polyurethane prepolymer is prepared from polyester diol, diisocyanate, and catalyst in a weight ratio of 68:33:0.2; wherein the polyester diol is specifically a polycarbonate diol with a molecular weight of 3000, the diisocyanate is specifically isophorone diisocyanate, and the catalyst is specifically dioctyltin dilaurate;

[0066] Isocyanate: 6 kg; in this embodiment, the isocyanate is specifically diphenylmethane diisocyanate;

[0067] Chain extender: 0.05 kg; in this embodiment, the chain extender is specifically 1,4-butanediol;

[0068] Organosilicon modified filler: 4.8 kg; in this embodiment, the organosilicon modified filler is specifically hollow glass microspheres modified with silane coupling agent KH550;

[0069] Solvent: 33 kg. In this embodiment, the solvent is specifically water.

[0070] The preparation method of the leak-proof coating 12 comprises the following steps:

[0071] The polyester diol was heated to 105°C for vacuum dehydration, then cooled to 65°C, diisocyanate and catalyst were added, stirred and mixed, and heated to 85°C for reaction for 2 hours to obtain a polyurethane prepolymer;

[0072] The polyurethane prepolymer, isocyanate, chain extender and organosilicon modified filler are uniformly mixed, and then heated to 75° C. to react for 5 hours. Then, a solvent is added and stirred to disperse uniformly to obtain a leak-proof coating 12.

[0073] The middle breathable layer specifically adopts PTFE membrane.

[0074] In addition, in this embodiment, the method for preparing the down jacket surface fabric with anti-down drape includes the following steps:

[0075] A leak-proof coating 12 is applied on one side of the nylon surface layer 11 to obtain an anti-drilling fleece layer 1;

[0076] A middle breathable layer 2 is compounded on one side of the anti-drilling fleece layer 1 facing away from the nylon surface layer 11;

[0077] Another anti-down drilling layer 1 is compounded on the middle breathable layer 2, wherein the anti-down drilling layer 1 has its anti-leakage coating 12 adjacent to the middle breathable layer 2, thereby obtaining a down jacket surface fabric with an anti-down drilling drape.

[0078] [Example 3]

[0079] A down jacket face fabric with a down-proof drape, which differs from [Example 1] in that the polyurethane prepolymer used in the leak-proof coating 12 is different.

[0080] In this embodiment, the polyurethane prepolymer is prepared from polyester diol, double-terminal hydroxyalkyl silicone oil, diisocyanate and catalyst in a weight ratio of 68:12:33:0.2; wherein, the polyester diol specifically adopts polycarbonate diol with a molecular weight of 2000, the double-terminal hydroxyalkyl silicone oil adopts double-terminal hydroxypropyl silicone oil with the brand number IOTA 2030-5 and a viscosity of 21cst; the diisocyanate specifically adopts diphenylmethane diisocyanate, and the catalyst specifically adopts dibutyltin dilaurate.

[0081] The preparation steps of polyurethane prepolymer are as follows:

[0082] After uniformly mixing polyester diol and double-terminated hydroxyalkyl silicone oil, the temperature was raised to 98°C for vacuum dehydration, then the temperature was lowered to 55°C, diisocyanate and catalyst were added, stirred and mixed, and the temperature was raised to 75°C for reaction for 3 hours to obtain a polyurethane prepolymer.

[0083] [Example 4]

[0084] A down jacket face fabric with a down-proof drape, which differs from [Example 1] in that the polyurethane prepolymer used in the leak-proof coating 12 is different.

[0085] In this embodiment, the polyurethane prepolymer is prepared from polyester diol, double-terminated hydroxyalkyl silicone oil, diisocyanate and catalyst in a weight ratio of 82:8:42:0.4; wherein the polyester diol specifically adopts polycarbonate diol with a molecular weight of 3000, the double-terminated hydroxyalkyl silicone oil adopts double-terminated hydroxypropyl silicone oil with the brand number IOTA 2030-20 and a viscosity of 39 cst; the diisocyanate specifically adopts diphenylmethane diisocyanate, and the catalyst specifically adopts dibutyltin dilaurate.

[0086] The preparation steps of polyurethane prepolymer are as follows:

[0087] After uniformly mixing polyester diol and double-terminated hydroxyalkyl silicone oil, the temperature was raised to 98°C for vacuum dehydration, then the temperature was lowered to 55°C, diisocyanate and catalyst were added, stirred and mixed, and the temperature was raised to 75°C for reaction for 3 hours to obtain a polyurethane prepolymer.

[0088] [Example 5]

[0089] A down jacket face fabric with a down-proof drape, which differs from [Example 3] in that the leak-proof coating 12 uses a different organosilicon-modified filler.

[0090] In this embodiment, the organic silicon modified coating used in the leak-proof coating is hollow glass microspheres modified with silane coupling agent KH550.

[0091] [Example 6]

[0092] A down jacket face fabric with a down-proof drape, which differs from [Example 3] in that the leak-proof coating 12 uses a different organosilicon-modified filler.

[0093] In this embodiment, the organosilicon-modified coating used in the leak-proof coating includes silane coupling agent KH550 modified glass fiber and silane coupling agent KH550 modified hollow glass microspheres, wherein the weight ratio of silane coupling agent KH550 modified glass fiber to silane coupling agent KH550 modified hollow glass microspheres is 1:1.

[0094] Comparative Example

[0095] [Comparative Example 1]

[0096] A down jacket fabric, which differs from [Example 1] in that:

[0097] The down jacket face fabric does not have an intermediate breathable layer.

[0098] [Comparative Example 2]

[0099] A down jacket fabric, which differs from [Example 1] in that:

[0100] The anti-drill fleece layer is not provided with a leak-proof coating.

[0101] Application Examples

[0102] Application Examples [1]-[6]

[0103] Among them, the difference between application examples [1]-[6] lies in the different down jacket surface fabrics used.

[0104] The down jacket surface fabric used in application example [1] is the down jacket surface fabric of [Example 1].

[0105] The down jacket surface fabric used in Application Example [2] is the down jacket surface fabric of [Example 1].

[0106] The down jacket surface fabric used in Application Example [3] is the down jacket surface fabric of [Example 1].

[0107] The down jacket surface fabric used in Application Example [4] is the down jacket surface fabric of [Example 1].

[0108] The down jacket surface fabric used in Application Example [5] is the down jacket surface fabric of [Example 1].

[0109] The down jacket surface fabric used in Application Example [6] is the down jacket surface fabric of [Example 1].

[0110] Comparative Application Examples

[0111] Comparative application examples [1]-[2]

[0112] The difference between comparative application examples [1]-[2] and application example [1] is that the down jacket surface fabrics used are different.

[0113] The down jacket surface fabric used in comparative application example [1] is the down jacket surface fabric of [Comparative Example 1].

[0114] The down jacket surface fabric used in comparative application example [2] is the down jacket surface fabric of [Comparative Example 2].

[0115] Performance testing

[0116] (1) Down penetration resistance: Test according to Appendix D of GB / T 14272-2021, “Test method for down penetration resistance of down garments”, with a rotation speed of 42 r / min and a revolution number of 2100. Record the down penetration value in roots / m 2. . Test objects: Application examples [1]-[6] and comparative application examples [1]-[2].

[0117] (2) Anti-wrinkle performance: Refer to GB / T 13769-2009 "Textiles - Test Method for Assessing the Smoothness of Fabric Appearance after Washing" and wash according to the washing procedure in GB / T 8629-2017. The washing procedure is cycled 5 times, and then the samples are rated. The wrinkle resistance level is divided into 5 levels: SA-1, SA-2, SA-3, SA-4, and SA-5. Among them, SA-5 is equivalent to the standard sample SA-5, which indicates the smoothest appearance and the best retention of the original appearance smoothness. SA-1 is equivalent to the standard sample SA-1, which indicates the least smooth appearance and the worst retention of the original appearance smoothness. Test objects: Application examples [1]-[6] and comparative application examples [1]-[2].

[0118] (3) Anti-linting performance: Wash according to the washing procedures in GB / T 8629-2017, and cycle the washing procedures 5 times, 10 times, and 20 times respectively to observe whether there is any linting. Test objects: Application examples [1]-[6] and comparative application examples [1]-[2].

[0119] Table 1 Test on the anti-down penetration and anti-wrinkle performance of down jackets

[0120]

[0121] Table 2 Down jacket anti-down performance test

[0122]

[0123] Combining Application Example 1 with Comparative Application Examples 1-2 and Table 1-2, it can be seen that the down jacket surface fabric in this application omits the intermediate breathable membrane or leak-proof coating, which can easily lead to a significant decrease in the anti-down penetration performance and anti-wrinkle performance of the down jacket, affecting the drape of the down jacket. At the same time, the down jacket has poor waterproof performance and poor anti-down running performance.

[0124] Combining Application Example 1 and Application Example 3 and the data in Table 1-2, it can be seen that adding double-ended hydroxyalkyl silicone oil to the leak-proof coating of the down jacket surface fabric of the present application can further improve the waterproof performance of the down jacket surface fabric. At the same time, it can also further improve the anti-down drilling performance of the down jacket surface fabric, which is conducive to obtaining a down jacket with better anti-down drilling and anti-down running performance.

[0125] Combining Application Example 3 with Application Examples 5-6 and the data in Table 1-2, it can be seen that in the leak-proof coating of the down jacket surface fabric of the present application, when the silicone-modified filler adopts a composition of aminosilane coupling agent-modified glass fiber and aminosilane coupling agent-modified hollow glass microspheres in a weight ratio of 1: (1-1.5), it is beneficial to further improve the wrinkle resistance of the down jacket surface fabric, and at the same time, it can also further improve the anti-down drilling performance of the down jacket surface fabric.

[0126] This specific implementation manner 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 non-creative modifications to the specific implementation manner as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A down jacket fabric with anti-down drape, characterized by: It comprises a middle breathable layer (2) and anti-drilling fleece layers (1) located on both sides of the middle breathable layer (2); Wherein, the anti-drilling fleece layer comprises a nylon surface layer (11) and a leak-proof coating layer (12); The number of warp yarns per square inch of the nylon surface layer (11) is 110-128, and the number of weft yarns is 68-90; The leak-proof coating (12) comprises a polyurethane prepolymer, an isocyanate, a chain extender, an organosilicon-modified filler, and a solvent; The weight ratio of the polyurethane prepolymer, isocyanate, chain extender, silicone modified filler and solvent is 100: (4-6): (0.02-0.05): (3.5-4.8): (25-33); The polyurethane prepolymer comprises polyester diol, double-terminal hydroxyalkyl silicone oil, diisocyanate and catalyst, wherein the weight ratio of the polyester diol, double-terminal hydroxyalkyl silicone oil, diisocyanate and catalyst is (68-82): (8-12): (33-42): (0.2-0.4); The organosilicon modified filler includes aminosilane coupling agent modified glass fiber and aminosilane coupling agent modified hollow glass microspheres, and the weight ratio of the aminosilane coupling agent modified glass fiber to the aminosilane coupling agent modified hollow glass microspheres is 1:(1-1.5).

2. The down jacket fabric with anti-down drape according to claim 1, characterized in that: The molecular weight of the polyester diol is 2000-3000.

3. The down jacket fabric with anti-down drape according to claim 1, characterized in that: The viscosity of the double-terminal hydroxyalkyl silicone oil is 20-40 cst.

4. The down jacket fabric with anti-down drape according to claim 1, characterized in that: The diisocyanate is at least one of diphenylmethane diisocyanate, isophorone diisocyanate and toluene-2,4-diisocyanate; and the catalyst is an organic metal catalyst.

5. The method for preparing a down jacket surface fabric with anti-down drape according to any one of claims 1 to 4, characterized in that: The following steps are involved: The polyurethane prepolymer, isocyanate, chain extender and silicone modified filler are uniformly mixed, and then the temperature is raised to 75-85°C for reaction for 4-5 hours, followed by adding a solvent and stirring and dispersing the mixture uniformly to obtain a leak-proof coating (12); A leak-proof coating (12) is applied on one side of the nylon surface layer (11) to obtain an anti-drilling fleece layer (1); A middle breathable layer (2) is compounded on one side of the anti-drilling fleece layer (1) facing away from the nylon surface layer (11); Another anti-drilling down layer (1) is compounded on the middle breathable layer (2), wherein the nylon surface layer (11) of the anti-drilling down layer (1) is located on the side away from the middle breathable layer (2), thereby obtaining a down jacket surface fabric with an anti-drilling down drape.

6. A down jacket, characterized by: A down jacket surface fabric with anti-down drape according to any one of claims 1 to 4.

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