Down-proof down feather fabric based on aerogel modification and preparation method thereof

Abstract

The invention discloses a down-proof down feather fabric based on aerogel modification and a preparation method thereof, and relates to the technical field of fabrics, the down-proof down feather fabric structurally comprises a one-way moisture conducting base cloth layer, a first hot melt adhesive net layer, an aerogel modified functional layer, a second hot melt adhesive net layer and an anti-static surface layer which are sequentially arranged from inside to outside; wherein the aerogel modified functional layer comprises the following raw materials: silicon dioxide aerogel slurry, resin emulsion and magnetic powder in a mass ratio of (4-6): 1: (0.2-0.6). The aerogel modified functional layer is subjected to component improvement, so that the fabric has down-proof performance, and meanwhile, the air permeability, moisture permeability and mechanical properties of the fabric are improved to a certain extent.

Description

Technical Field

[0001] The present invention belongs to the technical field of fabrics, and particularly relates to a down-proof fabric modified by aerogel and a preparation method thereof. Background Art

[0002] Down jackets are warm clothes in winter, and the down filled inside can play a good heat preservation role. During the production of down jackets, the selection of their fabrics has functional requirements such as heat preservation, waterproof, anti-fouling, windproof, breathable and moisture-permeable due to different wearing and environmental conditions. In addition, since knitted fabrics or woven fabrics are mostly selected for the fabrics, the pore structure of the fabrics will cause the risk of down leakage when the down is filled inside;

[0003] At present, different solutions have also been proposed for the problem of down leakage in down jacket fabrics. For example, increasing the weaving density of the fabric, coating or laminating the fabric, etc. However, increasing the weaving density of the fabric will cause an increase in the self-weight of the fabric. Under the requirement of pursuing lightweight clothing, the application effect is affected. Therefore, more research has been carried out on coating or laminating the fabric.

[0004] Aerogel film is a new type of nanoporous material with controllable nanostructure and large specific surface area. The fabric prepared by compounding the aerogel film with the base fabric has a good down-proof effect. Exploring the modification of the aerogel film is of positive significance for further improving other wearing properties of the laminated fabric besides down-proof. Summary of the Invention

[0005] The purpose of the present invention is to provide a down-proof fabric modified by aerogel and a preparation method thereof in order to solve the above problems.

[0006] The present invention realizes the above purpose through the following technical solutions:

[0007] As a first aspect of the present invention, the present invention provides a down-proof fabric modified by aerogel. The structure of the down-proof fabric includes a unidirectional moisture-conducting base fabric layer, a first hot melt adhesive mesh layer, an aerogel-modified functional layer, a second hot melt adhesive mesh layer, and an anti-static surface layer arranged in sequence from the inside to the outside; wherein, the aerogel-modified functional layer is composed of raw materials with the following mass ratio: silica aerogel slurry: resin emulsion: magnetic powder = 4-6: 1: 0.2-0.6.

[0008] As a further optimized scheme of the present invention, the silica aerogel slurry is prepared from raw materials with the following mass percentages: 10-50% of silica aerogel powder, 5-10% of eucalyptus oil, 5-10% of sodium dodecyl sulfate, and the balance is deionized water.

[0009] As a further optimized solution of the present invention, the unidirectional moisture-conducting base fabric layer is composed of a 50% polypropylene - 50% cotton weft-knitted double-layer fabric, and the anti-static surface layer is composed of 100% polyester fabric.

[0010] As a further optimized solution of the present invention, the resin emulsion is one or more of acrylic resin emulsion, EVA resin emulsion or epoxy resin emulsion.

[0011] As a second aspect of the present invention, the present invention also provides a preparation method of the anti-down-leakage down-proof fabric based on aerogel modification as described in any one of the above, specifically including the following steps:

[0012] (1) Prepare the aerogel-modified functional layer. Mix the silica aerogel slurry, resin emulsion and magnetic powder evenly to obtain the casting slurry. Scrape the casting slurry on the glass substrate, and apply a magnetic field force that moves vertically in a spiral reciprocating manner on the glass substrate for 30 - 60 s. Then let it stand for 30 min, and dry it at 40 - 100 °C for 1 - 3 h to obtain the aerogel-modified functional layer;

[0013] (2) Perform water-repellent treatment on the hydrophobic surface of the unidirectional moisture-conducting base fabric layer;

[0014] (3) Place the hydrophilic surface of the unidirectional moisture-conducting base fabric layer treated in step (2) upwards, and stack the first hot-melt adhesive net layer, aerogel-modified functional layer, second hot-melt adhesive net layer and anti-static surface layer in sequence, and then obtain the anti-down-leakage down-proof fabric based on aerogel modification through hot pressing treatment.

[0015] As a further optimized solution of the present invention, in step (2), the specific steps of the water-repellent treatment are: first steam the unidirectional moisture-conducting base fabric layer at 100 - 120 °C for 30 min, then put it into the water-repellent treatment liquid for padding treatment for 30 min, the bath ratio is 1:20 - 30, the liquor pickup rate is 70 - 75%, finally, pre-dry it at 60 °C for 15 min, and then bake it at 100 °C for 5 min.

[0016] As a further optimized solution of the present invention, in step (3), the hot pressing temperature is 100 - 120 °C, the hot pressing time is 120 - 150 s, and the hot pressing pressure is 2 - 4 MPa.

[0017] The beneficial effects of the present invention are as follows:

[0018] (1) The structure of the anti-down-leakage down-proof fabric provided by the present invention includes a unidirectional moisture-conducting base fabric layer, a first hot-melt adhesive net layer, an aerogel-modified functional layer, a second hot-melt adhesive net layer and an anti-static surface layer arranged in sequence from the inside out. By improving the composition of the aerogel-modified functional layer, while the fabric has anti-down-leakage property, its air permeability, moisture permeability and mechanical properties are all improved to a certain extent;

[0019] (2) In the present invention, magnetic powder is incorporated into the composition of the aerogel-modified functional film. During the preparation of the functional film, under the action of a magnetic field force that moves vertically in a spiral reciprocating manner, the magnetic powder generates micro-vibrations in the casting slurry, promoting more uniform dispersion of the casting slurry and causing the eucalyptus oil to fully foam, so that the surface pore structure of the finally obtained aerogel-modified functional film is more dense and uniform, thereby ensuring that the fabric has better air permeability and moisture permeability.

[0020] (3) In the present invention, resin emulsion is incorporated into the composition of the aerogel-modified functional film, which helps to improve the flexibility of the aerogel-modified functional film and increases the tearing strength and bursting strength of the fabric, strengthening the mechanical properties of the fabric. Specific Embodiments

[0021] The following further details the present application. It is necessary to point out here that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0022] 1. Materials and Methods

[0023] In the following embodiments, unless otherwise specified, all methods can be carried out according to conventional methods, and the materials, reagents, etc. used, unless otherwise stated, can be obtained through commercial channels.

[0024] 2. Methods

[0025] 2.1 Preparation of Aerogel-Modified Functional Layer

[0026] Mix silica aerogel slurry, resin emulsion and magnetic powder evenly to obtain a casting slurry. Apply the casting slurry onto a glass substrate and apply a magnetic field force that moves vertically in a spiral reciprocating manner on the glass substrate for 30 s. Then let it stand for 30 min and dry it at 80 °C for 2 h to obtain an aerogel-modified functional layer A;

[0027] Among them, silica aerogel slurry: resin emulsion: magnetic powder = 4:1:0.6. Among them, the resin emulsion is an equal-mass mixture of acrylic resin emulsion and EVA resin emulsion.

[0028] The silica aerogel slurry is prepared from the following raw materials by mass percentage: 30% silica aerogel powder, 5% eucalyptus oil, 5% sodium dodecyl sulfate, and the balance is deionized water.

[0029] Adjust the composition and preparation method of the aerogel-modified functional layer to prepare an aerogel-modified functional layer B. The specific adjustment plan is as follows:

[0030] Aerogel-modified functional layer B: Without adding magnetic powder, replaced with the same amount of talcum powder.

[0031] Aerogel-modified functional layer C: Without adding resin emulsion, replaced with the same amount of N,N-dimethylformamide.

[0032] Aerogel-modified functional layer D: The silica aerogel slurry is prepared from the following raw materials by mass percentage: 30% silica aerogel powder, 10% eucalyptus oil, 5% sodium dodecyl sulfate, and the balance is deionized water;

[0033] Aerogel-modified functional layer E: The silica aerogel slurry is prepared from the following raw materials by mass percentage: 30% silica aerogel powder, 5% sodium dodecyl sulfate, and the balance is deionized water;

[0034] 2.2. Pretreatment of the unidirectional moisture-conductive base fabric layer

[0035] The unidirectional moisture-conductive base fabric layer is steamed at 100 °C for 30 min, then immersed in a water-repellent treatment liquid for padding treatment for 30 min, the liquor ratio is 1:20, and the pick-up rate is 70%. Finally, it is pre-dried at 60 °C for 15 min and then baked at 100 °C for 5 min.

[0036] 2.3. Preparation of the anti-feather leakage down-proof fabric

[0037] With the hydrophilic side of the unidirectional moisture-conductive base fabric layer treated in Step 2.2 facing upwards, the hot melt adhesive mesh layer 1, aerogel-modified functional layers A-E, hot melt adhesive mesh layer 2, and the anti-static surface layer are stacked in sequence, and then the anti-feather leakage down-proof fabric a-e based on aerogel modification can be obtained through hot pressing. The hot pressing temperature is 120 °C, the hot pressing time is 120 s, and the hot pressing pressure is 2 MPa;

[0038] Among them, the composition of the unidirectional moisture-conductive base fabric layer is 50% polypropylene - 50% cotton weft-knitted double-layer fabric, the composition of the anti-static surface layer is 100% polyester fabric, and both the hot melt adhesive mesh layer 1 and the hot melt adhesive mesh layer 2 are polyamide adhesive meshes (pore diameter 100 - 200 μm, use temperature 110 - 140 °C).

[0039] In addition, on the basis of the prepared aerogel-modified functional layer A, the unidirectional moisture-conductive base fabric layer is replaced with polypropylene knitted fabric and cotton knitted fabric respectively to obtain the anti-feather leakage down-proof fabric f-g.

[0040] In addition, the fabric sample prepared without the aerogel-modified functional layer is used as the control group

[0041] 3. Performance testing

[0042] 3.1. Wicking property test of the anti-feather leakage down-proof fabric a-g

[0043] Refer to FZ / T 01071-2008 "Test Method for Capillary Effect of Textiles". The fabric is cut into strip specimens of 250 mm × 30 mm in the warp and weft directions. Three parallel specimens are taken for each group of samples, and the result is the average value of the three groups of test results.

[0044] During the test, the specimen (with the short side as the test edge) is naturally and vertically suspended above the liquid with red dye, and the lower end is immersed in the liquid about 15 mm. Record the maximum height that the liquid rises along the specimen within 30 minutes, which is the wicking height. The results are shown in Table 1.

[0045] Table 1 Test Results of Wicking Property

[0046]

[0047] During the moisture conduction process of the fabric, the phenomenon of moisture transfer through capillary action is the wicking of the fabric, which reflects the moisture conduction ability of the fabric. Generally, it is measured by the wicking height. Under the specified conditions, the higher the wicking height of the fabric, the more obvious the capillary effect and the higher the ability to transfer moisture.

[0048] It can be seen from the table that compared with other fabric samples, the wicking height of fabric a and fabric d is better. It can be seen that the moisture conduction properties of fabric a and fabric d are better than those of other fabrics. Fabric f uses polypropylene knitted fabric instead of the unidirectional moisture-conducting base fabric layer. Since polypropylene knitted fabric itself is not hydrophilic and has very low moisture absorption, this results in significantly lower moisture conduction performance of fabric f compared to other fabrics. Fabric g uses cotton knitted fabric, which has good moisture absorption, but from the table, its wicking height is lower than that of fabric a. This is because the unidirectional moisture-conducting base fabric layer used in fabric a is composed of a 50% polypropylene - 50% cotton weft-knitted double-layer fabric, and the upper and lower layers with hydrophilic-hydrophobic differences are formed by polypropylene and cotton on both sides respectively, realizing differential capillary action, and thus obtaining better moisture conduction ability compared to simply using cotton knitted fabric.

[0049] 3.2. Testing of the air permeability and moisture permeability properties of anti-feather leakage down fabrics a - g

[0050] (1) Air permeability test: The air permeability test equipment is a YG461EⅢ type full-automatic air permeability meter, with a test area of 20 cm 2 , a pressure drop of 100 Pa. The test is carried out with reference to the standard of GB / T5453 1997 "Determination of Air Permeability of Textiles". Three parallel specimens are taken for each group of samples, and the result is the average value of the three groups.

[0051] The air permeability of the fabric refers to the performance of the fabric to pass air through both sides under a specified pressure difference, which is represented by the air permeability rate R. That is, under a specified pressure difference, the volume of air passing through the fabric per unit time per unit area. The higher the R value, the better the air permeability of the fabric. The air permeability rate is R = 167q v / A; q vis the average air flow rate, dm 3 / min; A is the test area, cm 2 ; 167 is the conversion coefficient.

[0052] (4) Moisture permeability test: The moisture permeability test equipment is a YG601H-II type computerized fabric moisture permeability tester and an electronic balance. The test temperature is (38 ± 2) °C and the relative humidity is (50 ± 2)%. Referring to the standard of GB / T 12704.2 2009 "Textiles - Test methods for fabric moisture permeability - Part 2: Evaporation method", the positive cup method is selected for testing. Three parallel specimens are taken for each group. After balancing in the test chamber for 1 h, the results are the average values of the three groups.

[0053] Fabric moisture permeability refers to the ability of the fabric to allow water molecules to penetrate from one side to the other, which is measured by the moisture vapor transmission rate (WVT). The larger the WVT, the better the moisture permeability of the fabric, that is, WVT = 24△m / (A t );

[0054] where, WVT is the moisture vapor transmission rate, g / (m 2 ·24 h); △m is the difference in mass between two weighings of the same test assembly, g; A is the effective test area, m 2 , the specimen diameter is 60 mm; t is the test time, h.

[0055] The results are shown in Table 2.

[0056] Table 2 Test results of air permeability and moisture permeability

[0057]

[0058]

[0059] As can be seen from Table 2, fabrics a and d have better air permeability and moisture permeability compared with other fabrics, and the air permeability and moisture permeability values are not much different from those of the control group without the aerogel modified functional film, indicating that the aerogel modified functional films used in fabrics a and d have excellent pore structures and do not affect the overall air permeability and moisture permeability of the fabrics. Talc powder is used instead of magnetic powder in the composition of the aerogel modified functional film of fabric b, and eucalyptus oil is not incorporated into the silica aerogel slurry used in the aerogel modified functional film of fabric e. From the table, the air permeability and moisture permeability of fabrics b and e are inferior to those of fabric a.

[0060] The reason is that during the preparation of the aerogel modified functional film, under the action of the magnetic field force that moves vertically in a spiral reciprocating manner, the magnetic powder generates micro-vibrations in the casting slurry, which not only promotes the more uniform dispersion of the casting slurry but also enables the eucalyptus oil to fully foam, resulting in a more dense and uniform surface pore structure of the finally obtained aerogel modified functional film, thus ensuring that the fabric with the added aerogel modified functional film still has better air permeability and moisture permeability.

[0061] 3.3 Mechanical Property Tests of Down-proof Down-proof Fabrics a-g

[0062] (1) Tear Strength Test: The impact pendulum method was used for testing. The test equipment was a tear strength tester. The test was carried out with reference to GB / T3917.1 2009 "Textiles - Tear Properties of Fabrics - Part 1: Determination of Tear Strength by the Impact Pendulum Method". The specimen size was 10 cm × 10 cm. Specimens were prepared in the warp and weft directions for each fabric sample. Three parallel samples were set for each sample, and the result was the average value of the three groups.

[0063] (2) Bursting Strength Test: The steel ball method was selected for the bursting strength test of the fabric. The test equipment was a multi-functional electronic fabric strength tester. The test was carried out with reference to GB / T 19976 2005 "Textiles - Determination of Bursting Strength - Steel Ball Method". The specimen size was a circle with a diameter of 7.5 cm, and the size of the spherical plunger was a diameter of 25 mm. The specimen was fixed in the gripper. After starting the instrument, the spherical plunger directly above the specimen moved downward at a constant speed until the specimen was burst, and the bursting strength and bursting work were measured. Three parallel specimens were taken for each specimen, and the result was the average value of the three groups.

[0064] The results are shown in Table 3.

[0065] Table 3 Mechanical Property Test Results

[0066]

[0067]

[0068] It can be seen from Table 3 that compared with other fabrics, the mechanical properties of fabrics a and d, such as the values of tear strength and bursting strength, are better. Compared with fabric a, in the composition of the aerogel modified functional film of fabric c, no resin emulsion is added, and the mechanical properties of the fabric are inferior to those of fabric a. The reason is that the incorporation of resin materials can improve the flexibility of the aerogel modified functional film, resulting in an increase in the tear strength and bursting strength of the fabric, and the mechanical properties of the fabric are enhanced;

[0069] The reason why the mechanical properties of fabric e are better than those of fabrics a and d is that in the silica aerogel slurry in the composition of the aerogel modified functional film of fabric e, no eucalyptus oil is incorporated. Although this results in the pore effect of the fabric being inferior to that of fabric d, that is, the air permeability and moisture permeability are inferior to those of fabric d, the mechanical properties are slightly better than those of fabrics a and d. The comparison between fabric a and fabric e proves that eucalyptus oil can ensure both the air permeability and moisture permeability of the fabric and good mechanical properties of the fabric at an appropriate dosage.

[0070] The mechanical properties of fabric b are inferior to those of fabric a. The reason is that talcum powder is used instead of magnetic powder in the composition of the aerogel modified functional film of fabric b, so it will not be affected by the magnetic field force, resulting in the film surface uniformity of the aerogel modified functional film of fabric b being inferior to that of fabric a. When subjected to external tearing and bursting forces, its effect of dispersing stress is not good, thus leading to inferior mechanical properties compared to fabric a.

[0071] 3.4. Testing the anti-feather leakage performance of anti-feather leakage down fabrics a - g

[0072] According to the national standard GB / T12705.2 - 2009 "Textiles - Test method for anti - feather leakage property of fabrics - Part 2: Rotary box method" in the experiment, when the number of feather leakage of the fabric is greater than 15, it has poor anti - feather leakage property; when it is less than 15, it has anti - feather leakage property; when it is less than 5, it has good anti - feather leakage property. After the test, the number of feather leakage of fabrics a - g is less than 5, and they all have good anti - feather leakage property.

[0073] The above - mentioned embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. Anti-drilling down fabric based on aerogel modification, characterized by: The structure of the anti-drilling down fabric includes a unidirectional moisture-conducting base fabric layer, a hot melt adhesive mesh layer 1, an aerogel modified functional layer, a hot melt adhesive mesh layer 2 and an antistatic surface layer, which are arranged in sequence from the inside to the outside; wherein the aerogel modified functional layer includes raw materials in the following mass ratio: silica aerogel slurry: resin emulsion: magnetic powder = 4-6:1:0.2-0.

6.

2. The anti-drilling down fabric based on aerogel modification according to claim 1 is characterized in that: The silica aerogel slurry is prepared from the following raw materials in percentage by mass: 10-50% silica aerogel powder, 5-10% eucalyptus oil, 5-10% sodium dodecyl sulfate, and the balance is deionized water.

3. The anti-drilling down fabric based on aerogel modification according to claim 1 is characterized in that: The one-way moisture-conducting base fabric layer is composed of 50% polypropylene-50% cotton weft-knitted double-layer fabric, and the antistatic surface layer is composed of 100% polyester fabric.

4. The anti-drilling down fabric based on aerogel modification according to claim 1 is characterized in that: The resin emulsion is one or more of acrylic resin emulsion, EVA resin emulsion or epoxy resin emulsion.

5. A method for preparing an anti-drilling down fabric based on aerogel modification according to any one of claims 1 to 4, characterized in that: The specific steps include: (1) preparing an aerogel modified functional layer, mixing silica aerogel slurry with resin emulsion and magnetic powder to obtain a casting slurry, applying the casting slurry on a glass substrate, and applying a magnetic field force on the glass substrate in a spiral reciprocating vertical motion for 30-60 seconds, then standing for 30 minutes, and drying at 40-100° C. for 1-3 hours to obtain an aerogel modified functional layer; (2) performing water-repellent treatment on the hydrophobic surface of the unidirectional moisture-conducting base fabric layer; (3) The hydrophilic surface of the unidirectional moisture-conducting base fabric layer treated in step (2) is facing upward, and a hot melt adhesive mesh layer 1, an aerogel-modified functional layer, a hot melt adhesive mesh layer 2, and an antistatic surface layer are sequentially stacked, and then subjected to hot pressing treatment to obtain the aerogel-modified anti-down fabric.

6. The method for preparing the anti-drilling down fabric based on aerogel modification according to claim 5, characterized in that: In step (2), the specific steps of the water-repellent treatment are: first, the unidirectional moisture-conducting base fabric layer is steamed at 100-120°C for 30 minutes, then immersed in a water-repellent treatment liquid for 30 minutes, with a bath ratio of 1:20-30 and a rolling rate of 70-75%, and finally, pre-baked at 60°C for 15 minutes, and then baked at 100°C for 5 minutes.

7. The method for preparing the anti-drilling down fabric based on aerogel modification according to claim 5, characterized in that: In step (3), the hot pressing temperature is 100-120°C, the hot pressing time is 120-150s, and the hot pressing pressure is 2-4MPa.

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