A breathable, down-reflective composite down jacket fabric with an aerogel layer

Abstract

This invention relates to a breathable, down-displaying composite down jacket fabric with an aerogel layer, comprising a base layer, an aerogel layer, and a down-displaying layer. The aerogel layer includes a plurality of aerogel particles with their large and small ends alternately inverted, forming tortuous gaps between them. These gaps are filled with polyurethane soft foam, the raw materials of which are released from microcapsules. This fabric improves washability by incorporating aerogel particles. Even with a relatively thick aerogel layer, the aerogel particles maintain their integrity during washing and rubbing, preventing them from breaking apart. Furthermore, the polyurethane soft foam fills the gaps between the aerogel particles, acting as a buffer and preventing heat loss caused by these gaps.

Description

Technical Field

[0001] This invention belongs to the field of fabric technology, specifically relating to a breathable, down-reflective composite down jacket fabric containing an aerogel layer. Background Technology

[0002] Aerogel, as a material with unique properties, offers new possibilities for enhancing the functionality of clothing fabrics due to its low density, low thermal conductivity, high porosity, and excellent thermal insulation performance. However, applying aerogel to clothing fabrics still faces many challenges, such as the fragility of the material, its compatibility with textile fibers, and the balance between breathability and warmth.

[0003] Based on the application of aerogel in fabrics, it can be divided into the following two types: 1. Aerogel powder is incorporated into the fiber during spinning to make aerogel fiber. Due to the limited amount added, the heat insulation effect is not obvious; 2. Aerogel layer is made directly. By increasing the thickness, the heat insulation performance can be greatly improved. However, its fragility leads to the aerogel layer being prone to breakage and powder shedding after repeated washing and rubbing, which affects the heat insulation performance. Summary of the Invention

[0004] The purpose of this invention is to provide a breathable, down-reflecting composite down jacket fabric containing an aerogel layer in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions:

[0006] A breathable, down-displaying composite down jacket fabric with an aerogel layer comprises, in sequence, a base layer, an aerogel layer, and a down-displaying layer. The aerogel layer includes a plurality of aerogel particles with their large and small ends alternately inverted, forming tortuous gaps between the aerogel particles. The gaps are filled with polyurethane soft foam.

[0007] As a further optimization of the present invention, the preparation method of the aerogel particles is as follows: by weight, 55-70 parts of aerogel powder, 35-50 parts of polyurethane resin, 5-10 parts of sodium silicate aqueous solution of 55-65 μg / ml and 10-15 parts of water are mixed and heated to 155-185℃. After heating and stirring for 1-2 hours, the raw material of aerogel particles is obtained. Then, the raw material of aerogel particles is processed into staggered and inverted granules on the bottom layer by 3D printing process to obtain aerogel particles. The staggered and inverted fine aerogel particles can be formed on the bottom layer by 3D printing process. The process is simple and 3D printing technology has been maturely applied in industry.

[0008] As a further optimization of the present invention, the textured layer and the aerogel particles are fixed by an adhesive layer.

[0009] As a further optimization of the present invention, the manufacturing steps of the polyurethane flexible foam filler are as follows:

[0010] S1: The raw materials of each component of the polyurethane flexible foam filler are made into microcapsules, mixed evenly, and then filled into the gaps between the aerogel particles.

[0011] S2: After the fluff layer is bonded to the aerogel particles, the fabric is placed into the mold assembly. By passing high temperature and high humidity gas through the fabric, the wall material of the microcapsules is eliminated, and the core material of the microcapsules reacts with each other to foam into polyurethane soft foam filler.

[0012] S3: Continue to pass the fabric through high-temperature drying gas to remove residual water stains in the pores of the polyurethane foam filler.

[0013] By dissolving the wall material of the microcapsules, the raw materials of the various components of the polyurethane flexible foam filler are mixed and foamed to form the polyurethane flexible foam filler.

[0014] As a further optimization of the present invention, the wall material of the microcapsules is made of gelatin. Gelatin is easy to dissolve in high temperature and high humidity environments, making it convenient to discharge and not affecting the foaming reaction.

[0015] As a further optimization of the present invention, the raw materials of the core material, by weight, include: 90-100 parts of polyether polyol; 25-45 parts of isocyanate; 1.5-2.5 parts of water; 1.0-2.0 parts of silicone oil; 0.2-1.5 parts of pentamethyldiethylenetriamine; 0.5-1.75 parts of stannous octoate; and 0.5-3.0 parts of polypropylene oxide-ethylene oxide copolyether. Stannous octoate, as a metal salt catalyst, facilitates the crosslinking and curing of polyurethane; pentamethyldiethylenetriamine, as an organic amine catalyst, controls the rate of foaming and gelation reactions; silicone oil, as a surfactant, stabilizes the foam structure and prevents bubble coalescence; and polypropylene oxide-ethylene oxide copolyether, as an opening agent, forms a porous and breathable structure, making the polyurethane flexible foam filler soft and comfortable.

[0016] As a further optimization of the present invention, the temperature of the high-temperature and high-humidity gas is 50-75°C and the humidity is 85-95%, and the high-temperature and high-humidity gas flow is used to dissolve and discharge the wall material.

[0017] As a further optimization of the present invention, the mold assembly includes a hollow upper template and a lower template, wherein the bottom end of the upper template and the surface of the lower template are both provided with micropores. The upper template is also provided with an air inlet channel, and a steam generator, a blowing component, and a heating wire are sequentially arranged in the air inlet channel. The mold assembly is used to shape the bottom layer and the fluff layer, so that the polyurethane soft foam filler can fully fill the gaps between the aerogel particles during the foaming process, without lifting the bottom layer or the fluff layer and causing unevenness of the fabric.

[0018] The beneficial effects of this invention are as follows:

[0019] This invention improves the washability of fabrics by incorporating aerogel particles. Even with a high aerogel layer thickness, the aerogel particles can maintain their integrity during washing and rubbing without breaking. Furthermore, the polyurethane soft foam filler fully fills the gaps between the aerogel particles, acting as a buffer and connection, and also compensating for the heat loss caused by the gaps. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the fabric used in this invention;

[0021] Figure 2 This is a schematic diagram of the fabric before foaming according to the present invention;

[0022] Figure 3 This is the invention Figure 2 Enlarged view of the structure of section A in the middle;

[0023] Figure 4 This is a schematic diagram of the microcapsules of the present invention;

[0024] Figure 5 This is a schematic diagram of the mold assembly of the present invention;

[0025] In the diagram: 1. Fabric; 11. Bottom layer; 12. Fleece layer; 13. Aerogel particles; 14. Polyurethane flexible foam filler; 15. Adhesive layer; 16. Microcapsule; 1601. Wall material; 1602. Core material; 2. Mold assembly; 21. Upper template; 22. Lower template; 23. Air inlet channel; 24. Steam generator; 25. Blowering component; 26. Heating wire; 27. Micropores. Detailed Implementation

[0026] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection 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.

[0027] Example 1

[0028] like Figure 1-5 As shown, a breathable, down-displaying composite down jacket fabric with an aerogel layer includes, in sequence, a bottom layer 11, an aerogel layer, and a down-displaying layer 12. The aerogel layer includes a number of aerogel particles 13 with their large and small ends alternately inverted, forming tortuous gaps between the aerogel particles 13, and polyurethane soft foam filling material 14 is provided in the gaps.

[0029] The preparation method of aerogel particles 13 is as follows: by weight, 65 parts of aerogel powder, 40 parts of polyurethane resin, 10 parts of sodium silicate aqueous solution of 60 μg / ml and 15 parts of water are mixed and heated to 170℃. After heating and stirring for 2 hours, the raw material of aerogel particles is obtained. Then, the raw material of aerogel particles is processed into staggered and inverted granules on the bottom layer 11 by 3D printing process to obtain aerogel particles 13.

[0030] The textured layer 12 and the aerogel particles 13 are fixed together by the adhesive layer 15.

[0031] The manufacturing steps for polyurethane flexible foam filler 14 are as follows:

[0032] S1: The raw materials of each component of the polyurethane flexible foam filler 14 are made into microcapsules 16, mixed evenly, and then filled into the gaps of the aerogel particles 13.

[0033] S2: After the velvet layer 12 is bonded to the aerogel particles 13, the fabric 1 is placed into the mold assembly 2. By passing high temperature and high humidity gas through the fabric 1, the wall material 1601 of the microcapsule 16 is eliminated, and the core material 1602 of the microcapsule 16 reacts with each other to foam into polyurethane soft foam filler 14.

[0034] S3: Continue to pass the fabric 1 through high-temperature drying gas to remove residual water stains in the pores of the polyurethane soft foam filler 14.

[0035] The wall material 1601 of the microcapsule 16 is made of gelatin.

[0036] By weight, the raw materials of core material 1602 include: 95 parts polyether polyol; 35 parts isocyanate; 2 parts water; 1.5 parts silicone oil; 1 part pentamethyldiethylenetriamine; 1 part stannous octoate; and 2 parts polypropylene oxide-ethylene oxide copolyether.

[0037] The temperature of the high-temperature, high-humidity gas is 65℃, and the humidity is 90%.

[0038] The mold assembly 2 includes a hollow upper mold 21 and a lower mold 22. The bottom of the upper mold 21 and the surface of the lower mold 22 are both provided with micropores 27. The upper mold 21 is also provided with an air inlet channel 23. A steam generator 24, a blowing component 25, and a heating wire 26 are arranged in sequence in the air inlet channel 23. By providing micropores 27, the shape of the fabric 1 can be maintained to the maximum extent so that the gaps of the aerogel particles 13 are filled during the foaming process without making the fabric 1 uneven. The air humidity is increased by the steam generator 24 and the temperature is increased by the heating wire 26. The high temperature and high humidity gas causes the wall material 1601 to dissolve. After dissolution, it is directly discharged through the bottom layer 11 in the downward airflow. After the polyurethane flexible foam filler 14 is foamed, the steam generator 24 stops operating and blows in hot air to blow out the water vapor remaining in the gaps of the polyurethane flexible foam filler 14.

[0039] Example 2

[0040] Unlike Example 1:

[0041] The preparation method of aerogel particles 13 is as follows: 55 parts by weight of aerogel powder, 35 parts by weight of polyurethane resin, 5 parts by weight of sodium silicate aqueous solution (55 μg / ml), and 10 parts by weight of water are mixed and heated to 155℃. The mixture is stirred while heating for 1 hour to obtain the raw material for aerogel particles. Then, the raw material is processed into staggered, inverted granules on the bottom layer 11 using a 3D printing process to obtain aerogel particles 13. By weight, the components of the core material 1602 include: 90 parts by weight of polyether polyol; 25 parts by weight of isocyanate; 1.5 parts by weight of water; 1.0 part by weight of silicone oil; 0.2 parts by weight of pentamethyldiethylenetriamine; 0.5 parts by weight of stannous octoate; and 0.5 parts by weight of polypropylene oxide-ethylene oxide copolyether. The temperature of the high-temperature, high-humidity gas is 50℃, and the humidity is 85%.

[0042] Example 3

[0043] The difference from Example 1 is:

[0044] The preparation method of aerogel particles 13 is as follows: 70 parts by weight of aerogel powder, 50 parts by weight of polyurethane resin, 10 parts by weight of sodium silicate aqueous solution (65 μg / ml), and 15 parts by weight of water are mixed and heated to 185℃. The mixture is stirred while heating for 2 hours to obtain the raw material for aerogel particles. Then, the raw material is processed into staggered, inverted granules on the bottom layer 11 using a 3D printing process to obtain aerogel particles 13. The components of the core material 1602, by weight, include: 100 parts by weight of polyether polyol; 45 parts by weight of isocyanate; 2.5 parts by weight of water; 2.0 parts by weight of silicone oil; 1.5 parts by weight of pentamethyldiethylenetriamine; 1.75 parts by weight of stannous octoate; and 3.0 parts by weight of polypropylene oxide-ethylene oxide copolyether. The temperature of the high-temperature, high-humidity gas is 75℃, and the humidity is 95%.

[0045] Comparative Example 1

[0046] The fabric 1 of this comparative example includes, in sequence, a base layer 11, an aerogel layer, and a fleece layer 12. The aerogel layer is a continuous, gapless aerogel membrane. The aerogel membrane uses the same components as the aerogel particles 13 in Example 1, and the thickness of the aerogel layer is the same as that of the aerogel layer in Example 1.

[0047] Comparative Example 2

[0048] Unlike Example 1, the gaps between the aerogel particles in this comparative example are filled with foamed polyurethane flexible foam filler 14.

[0049] Comparative Example 3

[0050] Unlike Example 1, this comparative example does not contain polyurethane flexible foam filler 14, and the gaps between the aerogel particles 13 are empty.

[0051] The thermal insulation performance of the aerogel fabrics 1 obtained in Examples 1-3 and Comparative Examples 1-3 was tested. Fabrics 1 of the same area were obtained as samples. The thermal insulation performance of the samples before and after washing was tested in accordance with the international standard ASTM D 1518—2014 "Method for testing the thermal resistance of cotton wadding systems (hot plate method)". The unit of thermal insulation performance is W / m. 2 ·K.

[0052]

[0053] Based on the data, the following conclusions can be drawn:

[0054] By incorporating aerogel particles 13, the washability of fabric 1 is improved. Even with a high aerogel layer thickness, the aerogel particles 13 can maintain their integrity during washing and rubbing without breaking. Furthermore, the polyurethane soft foam filler 14 fully fills the gaps between the aerogel particles 13, acting as a buffer and connection, and compensating for heat loss caused by the gaps. Comparative Example 1 uses a gapless aerogel layer, which has better heat retention performance than the previous example before washing due to the absence of gaps. However, after washing, the brittleness of the aerogel layer leads to a rapid decline in heat retention performance. In Comparative Example 2, although the foamed polyurethane soft foam filler 14 also provides washability, the foamed polyurethane soft foam filler 14 results in insufficient filling, and its heat retention effect is lower than that of the polyurethane soft foam filler 14 foamed and filled by microcapsules 16. Comparative Example 3 has no gaps filled, and its heat retention performance is the lowest before washing. However, because its aerogel particles 13 are independent and the gaps are tortuous, the decrease in heat retention performance is relatively small after multiple washes.

[0055] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A breathable, down-reflective composite down jacket fabric containing an aerogel layer, characterized in that: The structure includes, in sequence, a bottom layer (11), an aerogel layer, and a textured layer (12). The aerogel layer includes several aerogel particles (13) with their large and small ends interlaced and inverted. The aerogel particles (13) form tortuous gaps between them, and polyurethane soft foam filler (14) is provided in the gaps. The preparation method of the aerogel particles (13) is as follows: by weight, 55-70 parts of aerogel powder, 35-50 parts of polyurethane resin, 5-10 parts of sodium silicate aqueous solution of 55-65μg / ml and 10-15 parts of water are mixed and heated to 155-185℃. After heating and stirring for 1-2 hours, the raw material of aerogel particles is obtained. Then, the raw material of aerogel particles is processed into staggered and inverted granules on the bottom layer (11) by 3D printing process to obtain aerogel particles (13). The manufacturing steps of the polyurethane flexible foam filler (14) are as follows: S1: The raw materials of each component of the polyurethane flexible foam filler (14) are made into microcapsules (16), mixed evenly, and then filled into the gaps of the aerogel particles (13). S2: After the fluff layer (12) is bonded to the aerogel particles (13), the fabric (1) is placed into the mold assembly (2). By passing high temperature and high humidity gas through the fabric (1), the wall material (1601) of the microcapsule (16) is eliminated, and the core material (1602) of the microcapsule (16) reacts with each other to foam into polyurethane soft foam filler (14). S3: Continue to pass the fabric (1) through high-temperature drying gas to remove the water stains remaining in the pores of the polyurethane soft foam filler (14); The wall material (1601) of the microcapsule (16) is made of gelatin; By weight, the raw materials of the core material (1602) include: 90-100 parts of polyether polyol; 25-45 parts of isocyanate; 1.5-2.5 parts of water; 1.0-2.0 parts of silicone oil; 0.2-1.5 parts of pentamethyldiethylenetriamine; 0.5-1.75 parts of stannous octoate; and 0.5-3.0 parts of polypropylene oxide-ethylene oxide copolyether.

2. The breathable, down-reflective composite down jacket fabric with an aerogel layer according to claim 1, characterized in that: The textured layer (12) and the aerogel particles (13) are fixed together by an adhesive layer (15).

3. The breathable, down-reflective composite down jacket fabric with an aerogel layer according to claim 1, characterized in that: The temperature of the high-temperature and high-humidity gas is 50-75℃, and the humidity is 85-95%.

4. The breathable, down-reflecting composite down jacket fabric with an aerogel layer according to claim 1, characterized in that: The mold assembly (2) includes a hollow upper template (21) and a lower template (22). The bottom end of the upper template (21) and the surface of the lower template (22) are both provided with micropores (27). The upper template (21) is also provided with an air inlet channel (23). A steam generator (24), a blower (25), and a heating wire (26) are arranged in sequence in the air inlet channel (23).

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