Preparation process of multifunctional five-in-one fabric

Abstract

The invention relates to the technical field of textile fabrics, in particular to a preparation process of a multifunctional five-in-one fabric, 75% of aramid fibers and 25% of carbon fibers are compounded by a biaxial weaving process to form a wear-resistant layer 1, so that the outermost surface of the fabric can have better wear resistance, and the wear resistance of the fabric is improved. The polyurethane layer can enable the fabric to have certain high-temperature-resistant and flame-retardant characteristics, so that the fabric can have certain flame retardance in an extreme environment so as to achieve the effect of protecting personal safety, the nanofiber membrane layer is prepared on the inner side of the polyurethane layer by adopting an electrostatic spinning process, and a better warm-keeping effect can be achieved; the fabric is more washable, better in air and moisture permeability and higher in comfort, graphene is uniformly coated on the surfaces of the polyester fibers by adopting a plasma spraying process, so that the heat preservation middle layer 3 has a better heat preservation effect, and cold insulation and heat insulation effects can be achieved on the external environment.

Description

Technical Field

[0001] The present invention relates to the technical field of textile fabrics, and particularly to a preparation process for a multifunctional five-in-one fabric. Background Art

[0002] Outdoor functional composite fabrics are high-performance textile materials designed specifically for outdoor activities. Their structures are complex and diverse, including an outer layer, a functional film layer, a thermal insulation layer, and an inner layer. These fabrics have multiple functions such as waterproofing, breathability, wind resistance, warmth retention, abrasion resistance, and ultraviolet protection. By comprehensively utilizing the characteristics of different fibers and layers, as well as adopting special textile structures and treatment techniques, multiple performances are balanced. When targeting extreme environments, the fire protection characteristics of the fabric also need to be considered, so as to provide the wearer with the maximum protection effect, enabling a piece of clothing to adapt to multiple environments, providing the most basic protection for outdoor explorers or outdoor survivors, and thus being able to protect the human body to maintain normal vital signs. Therefore, a preparation process for a multifunctional five-in-one fabric is required. Summary of the Invention

[0003] In view of the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide a preparation process for a multifunctional five-in-one fabric, which is used to solve the problem that the fabric in the prior art can adapt to various complex environments to protect personal safety.

[0004] To achieve the above purpose and other related purposes, the present invention provides the following technical solutions:

[0005] A preparation process for a multifunctional five-in-one fabric includes the following steps:

[0006] (a) Compound 75% aramid fiber and 25% carbon fiber through a biaxial weaving process to form an abrasion-resistant layer, and thermally press and bond a polyurethane layer with a thickness of 0.05 - 0.15 mm on its inner side;

[0007] (b) Prepare a nanofiber membrane layer on the inner side of the polyurethane layer by an electrospinning process. The nanofiber membrane has a thickness of 170 - 270 nm, a porous structure is formed on the surface, and the pore diameter is 0.1 - 10 nm, constituting a protective inner layer;

[0008] (c) Uniformly coat graphene on the surface of polyester fibers by a plasma spraying process on the inner side of the protective inner layer to form a heat-insulating middle layer; (d) Inject an aerogel prepolymer into a mold, and form an aerogel layer with conical breathable holes through a directional freeze-drying method. The breathable holes penetrate the aerogel layer along the thickness direction, the pore diameter is 0.1 - 0.5 mm, and the pore channels are inclined at an angle of 15° - 45°, constituting a heat-insulating inner layer;

[0009] (e) The pure cotton yarn is made into a skin-friendly layer with a thickness of 0.1 - 0.6 mm by plain weaving process, and is compounded with the heat-insulating inner layer through ultrasonic welding process to finally form a five-layer integrated structure.

[0010] To achieve the above technical solution, a wear-resistant layer is formed by compounding 75% aramid fiber and 25% carbon fiber using a biaxial weaving process, which enables the outermost surface of the fabric to have good wear resistance. The polyurethane layer enables the fabric to have certain high-temperature resistance and flame retardancy, so that the fabric in extreme environments can have a certain flame retardancy to achieve the effect of protecting personal safety. A nanofiber membrane layer is prepared inside the polyurethane layer by electrospinning process, which can have good heat preservation effect, and the fabric is more washable, has better air permeability and moisture permeability and higher comfort. Graphene is evenly coated on the surface of polyester fiber by plasma spraying process, which enables the middle heat-insulating layer to have good heat preservation effect, and can play a role in isolating cold and heat from the external environment. And the spraying process can bombard the plasma to make graphene more evenly coated on the fabric surface, thereby enhancing the heat preservation performance of the fabric. The setting of the aerogel layer is to improve the overall flexibility of the fabric, make the fabric have better integrity, and integrate two functional materials of aerogel and graphene into the fabric, which can make the fabric softer and reduce the quality of the fabric to achieve the lightness and thinness of the fabric. The ultrasonic quilting machine is used for wireless stitching of the fabric. Using the principle of high-frequency oscillation, the acoustic wave is transmitted to the welding surface of the textile workpiece by the machine welding head, instantly causing the molecules of the chemical fiber textile to generate friction, reaching the melting point of the plastic, quickly dissolving, so as to complete the wireless stitching, improving the use comfort of the fabric and making the fabric more beautiful at the same time.

[0011] In an embodiment of the present invention, in the step (a), the warp density of the biaxial weaving process is 50 - 70 threads / cm, and the weft density is 40 - 60 threads / cm.

[0012] To achieve the above technical solution, the biaxial weaving method can enable the wear-resistant layer to have better stability, and when wear occurs, the fabric on the worn surface will not have the situation of loose threads, making the connection between the weaving threads reliable.

[0013] In an embodiment of the present invention, in the step (d), the freezing temperature of the directional freeze-drying method is -50°C to -30°C, the vacuum degree is 10 - 50 Pa, and the freezing time is not less than 12 hours.

[0014] To achieve the above technical solution, in order to ensure the forming stability of the aerogel and the subsequent effect of conveniently forming conical air holes inside the aerogel, a stable freezing environment needs to be maintained.

[0015] In an embodiment of the present invention, a stabilizer is added to the aerogel, and the stabilizer is one of ammonium stearate, lauryl alcohol, and dodecanol.

[0016] By adding a stabilizer to the aerogel, the destruction of the pore structure caused by ice crystal growth during the freeze-drying process can be reduced, and the structural stability of the aerogel layer can be improved, thus realizing the above technical solution.

[0017] In an embodiment of the present invention, in the step (c), the power of the plasma spraying process is 20-40 kW, the spraying distance is 80-120 mm, and the thickness of the graphene coating is 5-15 μm.

[0018] When spraying the graphene coating, it is necessary to ensure the uniformity of the graphene spraying, so as to ensure the heat preservation effect of the graphene in the fabric, thus realizing the above technical solution.

[0019] In an embodiment of the present invention, in the step (e), the frequency of the ultrasonic welding process is 20-40 kHz, the welding pressure is 0.2-0.5 Mpa, and the skin-friendly layer and the heat preservation inner layer are connected and compounded with each other through a number of welding points distributed in a dot matrix. The welding points are circular dots, rectangular dots or strip-shaped structures.

[0020] In order to ensure the overall smoothness of the fabric, improve the aesthetics of the fabric and the reliability of the fabric during subsequent use, it is necessary to specifically define the structure of the welding points of the ultrasonic welding process, so as to ensure the use stability of the fabric, thus realizing the above technical solution.

[0021] In an embodiment of the present invention, the porosity of the aerogel layer is 90%-98%, and the thermal conductivity is 0.015-0.025 W / (m·K).

[0022] By improving the air permeability of the aerogel layer and reducing the thermal conductivity of the aerogel layer, the fabric can better adapt to special environments to protect personal safety, thus realizing the above technical solution.

[0023] In an embodiment of the present invention, the electrospinning process parameters of the nanofiber membrane layer are: voltage 15-25 kV, spinning solution flow rate 0.5-1.5 mL / h, and receiving distance 10-20 cm.

[0024] By making the nanofiber membrane layer have better air permeability, the overall use comfort of the fabric can be improved, thus realizing the above technical solution.

[0025] In an embodiment of the present invention, the cotton yarn count of the skin-friendly layer is 60-120 S, and the knitting density is 200-300 pieces per square inch.

[0026] Implement the above technical solution to improve the comfort of the skin-friendly layer in contact with the human body and the overall comfort of the fabric.

[0027] As described above, the preparation process of a multifunctional five-in-one fabric of the present invention has the following beneficial effects: The wear-resistant layer enables the outermost surface of the fabric to have good wear resistance. The polyurethane layer enables the fabric to have certain high-temperature resistance and flame retardant properties, so that the fabric in extreme environments can have a certain flame retardant property to achieve the effect of protecting personal safety. Using the plasma spraying process to uniformly coat graphene on the surface of polyester fibers can make the middle heat-insulating layer have good heat-insulating effect, and can play the role of cold and heat insulation for the external environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It shows a schematic diagram of the fabric structure of the preparation process of the multifunctional five-in-one fabric disclosed in the embodiment of the present invention.

[0029] Description of Component Labels

[0030] 1. Wear-resistant layer; 2. Inner protective layer; 3. Middle heat-insulating layer; 4. Inner heat-insulating layer; 5. Skin-friendly layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0032] Please refer to Figure 1 , the present invention provides a preparation process of a multifunctional five-in-one fabric, including the following steps:

[0033] (a) Composite 75% aramid fiber and 25% carbon fiber through a biaxial weaving process to form a wear-resistant layer 1, and thermally press and bond a polyurethane layer with a thickness of 0.05 - 0.15 mm on its inner side;

[0034] (b) Prepare a nanofiber membrane layer on the inner side of the polyurethane layer by an electrospinning process. The nanofiber membrane has a thickness of 170 - 270 nm, a porous structure is formed on the surface, and the pore diameter is 0.1 - 10 nm, constituting an inner protective layer 2;

[0035] (c) Uniformly coat graphene on the surface of polyester fibers by a plasma spraying process on the inner side of the inner protective layer 2 to form a middle heat-insulating layer 3;

[0036] (d) Inject the aerogel prepolymer into the mold and form an aerogel layer with tapered breathable pores through the directional freeze-drying method. The breathable pores penetrate the aerogel layer in the thickness direction, with a pore diameter of 0.1 - 0.5 mm, and the pore channels are inclined at an angle of 15° - 45°, constituting the thermal insulation inner layer 4;

[0037] (e) Make the skin-friendly layer 5 with a thickness of 0.1 - 0.6 mm from pure cotton yarn by plain weaving process, and composite it with the thermal insulation inner layer 4 through ultrasonic welding process to finally form a five-layer integrated structure.

[0038] The wear-resistant layer 1 is formed by compounding 75% aramid fiber and 25% carbon fiber using the biaxial weaving process, which can make the outermost surface of the fabric have better wear resistance. The polyurethane layer can endow the fabric with certain high-temperature resistance and flame retardant properties, so that the fabric in extreme environments can have a certain flame retardant property to achieve the effect of protecting personal safety. A nanofiber membrane layer is prepared on the inner side of the polyurethane layer by electrospinning process, which can have a good heat preservation effect, and the fabric is more wash-resistant, has better air permeability and moisture permeability and higher comfort. Graphene is evenly coated on the surface of polyester fiber by plasma spraying process, which can make the thermal insulation middle layer 3 have a good heat preservation effect, and can play an effect of isolating cold and heat from the external environment. And the spraying process can bombard the plasma to make graphene more evenly coated on the fabric surface, thereby enhancing the heat preservation performance of the fabric. The setting of the aerogel layer is to improve the overall flexibility of the fabric, make the fabric have better integrity, and integrate two functional materials of aerogel and graphene into the fabric, which can make the fabric softer and reduce the quality of the fabric to achieve the lightness and thinness of the fabric. The fabric is sewn wirelessly using an ultrasonic quilting machine. Using the principle of high-frequency oscillation, the acoustic wave is transmitted to the welding surface of the textile workpiece by the mechanism welding head, instantly causing the molecules of the chemical fiber textile to generate friction, reaching the melting point of the plastic, quickly dissolving, so as to complete the wireless sewing, improving the use comfort of the fabric and making the fabric more beautiful at the same time.

[0039] In step (a), the warp density of the biaxial weaving process is 50 - 70 threads / cm, and the weft density is 40 - 60 threads / cm. The biaxial weaving method can make the wear-resistant layer 1 have better stability, and when there is wear, the fabric on the worn surface will not have the situation of loose threads, making the connection between the woven threads reliable.

[0040] In step (d), the freezing temperature of the directional freeze-drying method is -50°C to -30°C, the vacuum degree is 10 - 50 Pa, and the freezing time is not less than 12 hours. In order to ensure the forming stability of the aerogel and the subsequent effect of conveniently forming tapered breathable pores inside the aerogel, a stable freezing environment needs to be maintained.

[0041] A stabilizer is added to the aerogel. The stabilizer is one of ammonium stearate, lauryl alcohol, and dodecanol. By adding the stabilizer to the aerogel, the damage to the pore structure caused by ice crystal growth during freeze-drying can be reduced, and the structural stability of the aerogel layer can be improved.

[0042] In step (c), the power of the plasma spraying process is 20 - 40 kW, the spraying distance is 80 - 120 mm, and the thickness of the graphene coating is 5 - 15 μm. When spraying the graphene coating, it is necessary to ensure the uniformity of graphene spraying, so as to ensure the heat preservation effect of graphene in the fabric.

[0043] In step (e), the frequency of the ultrasonic welding process is 20 - 40 kHz, and the welding pressure is 0.2 - 0.5 Mpa. The skin-friendly layer 5 and the heat-insulating inner layer 4 are connected and compounded with each other through a number of welding points distributed in a dot matrix. The welding points are circular dots, rectangular dots, or strip-shaped structures. In order to ensure the overall smoothness of the fabric, improve the aesthetics of the fabric and the reliability of the fabric during subsequent use, special structural limitations need to be imposed on the welding points of the ultrasonic welding process, so as to ensure the use stability of the fabric.

[0044] The porosity of the aerogel layer is 90% - 98%, and the thermal conductivity is 0.015 - 0.025 W / (m·K), which improves the air permeability of the aerogel layer and reduces the thermal conductivity of the aerogel layer, so that the fabric can better adapt to special environments to protect personal safety.

[0045] The electrospinning process parameters of the nanofiber membrane layer are: voltage 15 - 25 kV, spinning solution flow rate 0.5 - 1.5 mL / h, and receiving distance 10 - 20 cm, so that the nanofiber membrane layer has better air permeability and improves the overall use comfort of the fabric.

[0046] The cotton yarn count of the skin-friendly layer 5 is 60 - 120 S, and the knitting density is 200 - 300 pieces per square inch, which improves the comfort of the skin-friendly layer 5 in contact with the human body and improves the overall use comfort of the fabric.

[0047] The wear-resistant layer of the present invention enables the outermost surface of the fabric to have good wear resistance, and the polyurethane layer enables the fabric to have certain high-temperature resistance and flame retardancy characteristics, so that the fabric in extreme environments can have certain flame retardancy to achieve the effect of protecting personal safety. Using the plasma spraying process to evenly coat graphene on the surface of polyester fibers can make the middle heat-insulating layer have a good heat preservation effect, and can also play a role in isolating cold and heat from the external environment.

[0048] The above embodiments are only illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. All equivalent modifications or changes made by those of ordinary skill in the art within the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A multifunctional five-in-one fabric preparation process, characterized in that: The following steps are involved: (a) 75% aramid fiber and 25% carbon fiber are composited to form a wear-resistant layer through a biaxial weaving process, and a polyurethane layer with a thickness of 0.05 to 0.15 mm is hot-pressed and bonded to the inner side thereof; (b) preparing a nanofiber membrane layer on the inner side of the polyurethane layer by an electrospinning process, wherein the nanofiber membrane has a thickness of 170 to 270 nm and a porous structure with a pore size of 0.1 to 10 nm, constituting a protective inner layer; (c) uniformly coating the graphene on the surface of the polyester fiber on the inner side of the protective inner layer by a plasma spraying process to form a thermal insulation middle layer; (d) injecting an aerogel prepolymer into a mold, and forming an aerogel layer having conical air holes by a directional freeze-drying method, wherein the air holes penetrate the aerogel layer in a thickness direction, have a pore size of 0.1 to 0.5 mm, and are distributed at an angle of 15° to 45°, thereby forming a thermal insulation inner layer; (e) The pure cotton yarn is made into a skin-friendly layer with a thickness of 0.1 to 0.6 mm by a plain weave process, and is composited with the thermal insulation inner layer by an ultrasonic welding process to finally form a five-layer integrated structure.

2. The multifunctional five-in-one fabric preparation process according to claim 1, characterized in that: The warp yarn density of the biaxial weaving process in step (a) is 50 to 70 yarns / cm, and the weft yarn density is 40 to 60 yarns / cm.

3. The multifunctional five-in-one fabric preparation process according to claim 1, characterized in that: The freezing temperature of the directional freeze-drying method in step (d) is -50°C to -30°C, the vacuum degree is 10 to 50 Pa, and the freezing time is not less than 12 hours.

4. The multifunctional five-in-one fabric preparation process according to claim 1, characterized in that: A stabilizer is added into the aerogel, and the stabilizer is one of ammonium stearate, lauryl alcohol and dodecanol.

5. The multifunctional five-in-one fabric preparation process according to claim 1, characterized in that: The power of the plasma spraying process in the step (c) is 20-40 kW, the spraying distance is 80-120 mm, and the thickness of the graphene coating is 5-15 μm.

6. The multifunctional five-in-one fabric preparation process according to claim 1, characterized in that: The frequency of the ultrasonic welding process in step (e) is 20-40kHz, the welding pressure is 0.2-0.5Mpa, and the skin-friendly layer and the thermal insulation inner layer are interconnected and compounded through a plurality of welding points distributed in a dot matrix, and the welding points are in the shape of circular dots, rectangular dots or long strips.

7. The multifunctional five-in-one fabric preparation process according to claim 1, characterized in that: The porosity of the aerogel layer is 90% to 98%, and the thermal conductivity is 0.015 to 0.025 W / (m·K).

8. The multifunctional five-in-one fabric preparation process according to claim 1, characterized in that: The electrospinning process parameters of the nanofiber membrane layer are: voltage 15-25 kV, spinning solution flow rate 0.5-1.5 mL / h, receiving distance 10-20 cm.

9. The multifunctional five-in-one fabric preparation process according to claim 1, characterized in that: The pure cotton yarn count of the skin-friendly layer is 60-120S, and the weaving density is 200-300 yarns / inch2.

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