Anti-condensation coated fabric with good ventilation effect

Abstract

The invention relates to the technical field of textile materials, in particular to an anti-condensation coated fabric with a good air permeability effect, which is characterized in that fibers with high air permeability and good mechanical properties are selected as base materials, including but not limited to one or more of polyester fibers, nylon fibers or superfine fibers; according to the invention, the microencapsulated phase-change material is embedded on the surface of the fiber or in the fiber, the fabric can effectively prevent the occurrence of condensation phenomenon, and the microencapsulated phase-change material can absorb or release heat during temperature fluctuation, so that the surface temperature of the fabric is kept stable; the fiber with high air permeability and good mechanical property is adopted as a basic material, and the roughness and hydrophilicity of the surface of the fiber are enhanced through chemical modification and physical modification, so that obstruction of gas and moisture among the fiber is reduced, and air circulation is smoother.

Description

Technical Field

[0001] The invention relates to the technical field of textile materials, in particular to an anti-condensation coated fabric with good air permeability. Background Art

[0002] In the textile industry, traditional fabric materials often face problems such as poor air permeability and easy condensation. These problems are particularly prominent under certain environmental conditions, such as high humidity and large temperature changes. First, poor air permeability makes it difficult to discharge moisture inside the fabric, making it uncomfortable to wear and even causing health problems such as skin itching and eczema. Secondly, condensation occurs when the temperature difference between the inside and outside of the fabric is large, and the water vapor in the air condenses into water droplets on the surface of the fabric. This not only affects the appearance of the fabric, but may also cause the internal material to become damp and deteriorate, reducing the durability of the product.

[0003] Although there are some anti-condensation coated fabrics on the market, these fabrics often sacrifice air permeability in exchange for anti-condensation effects, or their anti-condensation effects are not long-lasting, making it difficult to meet the growing consumer demand. In addition, during the preparation process of traditional coated fabrics, the bonding force between the coating and the fiber substrate is weak, and the coating is prone to fall off and cracking during use, further affecting the overall performance and service life of the fabric.

[0004] Therefore, there is an urgent need for an anti-condensation coated fabric with good air permeability to overcome the deficiencies of traditional fabrics in terms of air permeability and anti-condensation performance. Summary of the invention

[0005] Technical issues solved In view of the above-mentioned shortcomings of the prior art, the present invention provides an anti-condensation coated fabric with good air permeability. By embedding microencapsulated phase change materials (such as microencapsulated phase change wax, paraffin and hydrated salt) on the surface or inside of the fiber, the fabric can effectively prevent the occurrence of condensation. The microencapsulated phase change material can absorb or release heat when the temperature fluctuates, thereby maintaining the stability of the surface temperature of the fabric. Fibers with high air permeability and good mechanical properties (such as polyester fibers, nylon fibers or ultrafine fibers) are used as basic materials. The roughness and hydrophilicity of the fiber surface are enhanced through chemical modification and physical modification, thereby reducing the obstruction of gas and moisture between fibers, making air circulation smoother.

[0006] Technical Solution To achieve the above objectives, the present invention is implemented through the following technical solutions: An anti-condensation coated fabric with good air permeability, characterized in that the fabric selects fibers with high air permeability and good mechanical properties as the base material, the fibers are polyester fibers, nylon fibers or ultrafine fibers, and the specific processing steps for the fabric are: S100, pre-treating the fiber, wherein the fiber pre-treatment includes but is not limited to surface modification and plasma treatment; S200, embedding microencapsulated phase change material, wherein the surface or interior of the fiber is embedded with microencapsulated phase change material, wherein the phase change material is selected from one or more of microencapsulated phase change wax, paraffin wax and hydrated salt; S300, weaving the fibers into a fabric; S400, coating with a temperature control coating, wherein the fabric is further coated with a temperature control coating formed by uniformly dispersing a phase change material in a polymer matrix.

[0007] Furthermore, the specific steps of fiber pretreatment in step S100 are as follows: S101, removes impurities and grease from the fiber surface, making the fiber clean, soft and easy to handle; S102, changing the chemical structure and physical form of the fiber surface by chemical modification and physical modification, wherein the chemical modification uses a silane coupling agent to modify the fiber surface to increase its hydrophilicity, and the physical modification includes stretching and heat treatment; S103, using the high energy of plasma to bombard the fiber surface.

[0008] Furthermore, the chemical modification in step S102 is specifically as follows: the fiber surface is modified by a silane coupling agent, wherein one end of the silane coupling agent can react with the hydroxyl group on the fiber surface to form a chemical bond, and the other end contains a functional group that can react with the group in the polymer coating.

[0009] Furthermore, the plasma treatment in step S103 is specifically as follows: placing the pretreated fiber in a plasma treatment device, using set plasma gas, power and treatment time, the plasma gas is at least one of argon, nitrogen and oxygen, and during the plasma treatment process, high-energy particles bombard the fiber surface to generate active substances of free radicals and ions, and the active substances react with functional groups on the fiber surface to form new chemical bonds or change the surface morphology, thereby improving the hydrophilicity of the fiber surface.

[0010] Furthermore, the specific steps of embedding the microencapsulated phase change material in step S200 are as follows: S201, prepare microcapsules by in-situ polymerization S202, and embed them into the surface or interior of the fiber by dipping, spinning or spraying, wherein the dipping method specifically involves dipping the fiber into a solution containing microcapsules so that the microcapsules adhere to the fiber surface, the spinning method specifically involves adding microcapsules to the spinning solution during the spinning process so that the microcapsules are embedded into the fiber during the fiber formation process, and the spraying method uses a spraying device to spray the microcapsule solution on the fiber surface to form a microcapsule coating.

[0011] Furthermore, the impregnation method proposed in step S202 is specifically as follows: preparing a solution containing microcapsules, uniformly dispersing the microcapsule powder in an appropriate solvent to form a stable solution, the solvent including water or an organic solvent, immersing the fiber to be treated in the prepared solution, taking out the impregnated fiber for fixation treatment so that the microcapsules are firmly attached to the fiber surface, the fixation treatment is drying or baking, the spinning method proposed in step S202 is specifically as follows: in the spinning process, adding microcapsules to the spinning solution in an appropriate proportion, extruding the spinning solution containing the microcapsules into filaments through a spinning machine, and forming fibers during stretching and cooling, in this process, the microcapsules are uniformly embedded in the internal structure of the fiber, the spraying method proposed in step S202 is specifically as follows: dispersing the microcapsule powder in an appropriate solvent to form a stable solution, adding a dispersant or stabilizer to the solution to prevent the aggregation and precipitation of the microcapsules, and using a spraying device to uniformly spray the prepared solution on the fiber surface.

[0012] Furthermore, the specific steps of applying the temperature control coating in step S400 are as follows: S401, polymer matrix: the polymer is polyurethane or acrylic resin; S402, phase change material: the phase change material is nano-scale phase change wax, microencapsulated paraffin or hydrated salt; S403, mixing and dispersing: using a high-speed mixer or a planetary mixer, the polymer matrix and the phase change material are mixed, an appropriate amount of dispersant and defoamer are added, and the ultrasonic dispersion equipment is started to utilize the cavitation effect and micro-jet effect of ultrasonic waves to evenly disperse the phase change material nanoparticles in the polymer matrix to form a stable temperature-controlled coating slurry; S404, coating process details: Step 1: Pretreatment: Before coating, the fabric surface is cleaned, including but not limited to removing impurities such as dust and oil; Step 2: The coating is carried out by scraping, wherein the scraping uses a scraper to evenly scrape the temperature control coating slurry onto the fabric surface.

[0013] Beneficial Effects Compared with the known public technology, the technical solution provided by the present invention has the following beneficial effects: 1. The present invention embeds microencapsulated phase change materials (such as microencapsulated phase change wax, paraffin and hydrated salt) on the surface or inside of the fiber, so that the fabric can effectively prevent the occurrence of condensation. The microencapsulated phase change materials can absorb or release heat when the temperature fluctuates, thereby maintaining the stability of the surface temperature of the fabric. When the ambient humidity is high and the temperature is close to the dew point, the phase change materials in the microcapsules can absorb heat and undergo phase change, preventing moisture from condensing into dew drops on the surface of the fabric. This intelligent temperature control function not only improves the wearing comfort, but also extends the service life of the fabric, avoiding mildew and corrosion problems caused by long-term condensation.

[0014] 2. The present invention adopts fibers with high air permeability and good mechanical properties (such as polyester fibers, nylon fibers or ultrafine fibers) as the base material, and further optimizes the fiber surface structure through pretreatment steps (such as surface modification and plasma treatment), thereby greatly improving the air permeability of the fabric. This treatment not only removes impurities and grease on the fiber surface, but also enhances the roughness and hydrophilicity of the fiber surface through chemical modification and physical modification, thereby reducing the obstruction of gas and moisture between fibers, making air circulation smoother.

[0015] 3. The present invention adds an extra protective layer and functionality to the fabric by coating the temperature control coating. The temperature control coating is formed by uniformly dispersing phase change materials in a polymer matrix using nanotechnology, which not only improves the film-forming, weather resistance and adhesion of the coating, but also gives the fabric stronger durability. The addition of nano-scale phase change materials makes the coating more delicate and uniform, and not easy to fall off or wear. At the same time, the good combination of the temperature control coating and the fiber surface further enhances the overall performance of the fabric, such as wrinkle resistance, tear resistance and wear resistance. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the present invention is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] The present invention will be further described below in conjunction with the embodiments.

[0018] A dew condensation-proof coated fabric with good air permeability, wherein the fabric uses fibers with high air permeability and good mechanical properties as the base material, and the fibers are polyester fibers, nylon fibers or ultrafine fibers. The specific processing steps for the fabric are as follows: S100, pre-treating the fiber, wherein the fiber pre-treatment includes but is not limited to surface modification and plasma treatment; S200, embedding microencapsulated phase change material, wherein the surface or interior of the fiber is embedded with microencapsulated phase change material, wherein the phase change material is selected from one or more of microencapsulated phase change wax, paraffin wax and hydrated salt; S300, weaving the fibers into a fabric; S400, coating with a temperature control coating, wherein the fabric is further coated with a temperature control coating formed by uniformly dispersing a phase change material in a polymer matrix.

[0019] Example 1: Breathable anti-condensation coated fabric based on polyester fiber Material selection: Polyester fiber is selected as the base material because of its high air permeability and good mechanical properties.

[0020] Step S100: Fiber pretreatment: S101: Remove impurities and grease from the fiber surface through ultrasonic cleaning to ensure that the fiber is clean and soft, laying the foundation for subsequent processing; S102: chemically modify the fiber surface with a silane coupling agent to increase its hydrophilicity. One end of the silane coupling agent can react with the hydroxyl group on the fiber surface to form a chemical bond, and the other end contains a functional group that can react with the group in the polymer coating. The reaction equation is: Si-OR+HO-Fiber→Si-O-Fiber+ROH, where Si-OR represents the silane coupling agent, HO-Fiber represents the hydroxyl group on the fiber surface, and ROH represents the alcohol substance generated by the reaction. Physical stretching and heat treatment are performed in sequence to improve the mechanical properties and surface roughness of the fiber to enhance the bonding force with the subsequent coating. The stretching multiple is 1.5-3 times, the heat treatment temperature is 150-250°C, and the treatment time is 10-30 minutes. S103: Using argon plasma treatment equipment, select the set plasma gas, power and treatment time, the set plasma gas is nitrogen, the set power is 50-200W and the treatment time is 5-15 minutes, and the fiber surface is bombarded with high energy to generate free radicals and ions, thereby further improving the chemical activity and physical structure of the fiber surface.

[0021] Step S200: embedding microencapsulated phase change material: S201: preparing microencapsulated phase change wax by in-situ polymerization to ensure that the microcapsules have good coating properties and thermal stability, wherein the in-situ polymerization method is to directly undergo a polymerization reaction on the surface of the core material to form a film-like material coating the core material, wherein the wall material in the in-situ polymerization method includes but is not limited to urea-formaldehyde resin, melamine resin and polyurethane polymer materials, and the specific preparation conditions during the preparation are: a temperature of 40-80° C. and a stirring rate of 500-1500 rpm to ensure that the morphological structure, particle size and performance of the microcapsules meet the requirements; S202: Select an impregnation method to immerse the polyester fiber in an aqueous solution containing uniformly dispersed microcapsules, wherein the mass proportion of the microcapsules in the aqueous solution is 20-30%, ensuring that the fiber fully absorbs and adheres to the microcapsules. Subsequently, drying and baking treatments are performed to firmly fix the microcapsules on the fiber surface. The drying temperature is 80-120°C, and the baking temperature is 130-170°C.

[0022] Step S400: Temperature control coating application: S401: Polyurethane is selected as the polymer matrix due to its excellent film-forming properties, weather resistance and adhesion; S402: The phase change material is evenly dispersed in the polyurethane matrix by stirring to form a temperature control coating slurry. The phase change material is a microencapsulated phase change wax and accounts for 10-25% of the mass of the temperature control coating slurry. The temperature control coating slurry is evenly coated on the fiber surface in which the microcapsules are embedded by a spraying process, and then dried and solidified to form the final breathable and anti-condensation coated fabric.

[0023] Example 2: Breathable and anti-condensation coated fabric using plasma deep modification combined with spraying Material selection: Microfiber is selected as the base material.

[0024] Step S100: Step S101 and step S102 are the same as those in the first embodiment, and the plasma treatment is strengthened in step S103, and a mixed gas (such as argon and oxygen) is used for deep modification to improve the activity and hydrophilicity of the fiber surface; Step S200: spraying the microencapsulated hydrated salt directly onto the surface of the fiber treated with plasma by a spraying method, and utilizing the active sites generated by the high-energy plasma to promote the firm attachment of the microcapsules; S300, weaving the fibers into a fabric; Step S400: Select acrylic resin as the polymer matrix, take advantage of its excellent transparency and flexibility, and combine it with nanotechnology to form a transparent temperature control coating, thereby maintaining the original texture of the fabric while improving the anti-condensation effect.

[0025] Example 3: Breathable and anti-condensation coated fabric with multi-layer microcapsule embedding and multi-layer temperature control coating Material selection: Mainly polyester fiber, supplemented by a small amount of nylon fiber reinforcement.

[0026] Steps S100 to S200: Step S100 is the same as in Example 1. In S200, a multi-layer embedding technology is used. First, the microencapsulated phase change wax is embedded in the fiber by spinning, and then a layer of microencapsulated hydrated salt is attached to the fiber surface by impregnation, thereby forming internal and external dual regulation. S300, weaving the fibers into a fabric; Step S400: Design a multi-layer temperature control coating structure, use a polyurethane matrix for the bottom layer to enhance adhesion, add nanoparticles to the middle layer to enhance thermal conductivity, and use acrylic resin to form a transparent protective layer on the surface. Through layer-by-layer coating and drying and curing, a multi-layer coated fabric with excellent air permeability and anti-condensation performance is formed.

[0027] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dew condensation-proof coated fabric with good air permeability, characterized in that: The fabric uses fibers with high air permeability and good mechanical properties as the base material, and the fibers are polyester fibers, nylon fibers or ultrafine fibers. The specific processing steps for the fabric are as follows: S100, pre-treating the fiber, wherein the fiber pre-treatment includes but is not limited to surface modification and plasma treatment; S200, embedding microencapsulated phase change material, wherein the surface or interior of the fiber is embedded with microencapsulated phase change material, wherein the phase change material is selected from one or more of microencapsulated phase change wax, paraffin wax and hydrated salt; S300, weaving the fibers into a fabric; S400, coating with a temperature control coating, wherein the fabric is further coated with a temperature control coating formed by uniformly dispersing a phase change material in a polymer matrix.

2. The anti-condensation coated fabric with good air permeability according to claim 1, characterized in that: The specific steps of fiber pretreatment in step S100 are as follows: S101, removes impurities and grease from the fiber surface, making the fiber clean, soft and easy to handle; S102, changing the chemical structure and physical form of the fiber surface by chemical modification and physical modification, wherein the chemical modification uses a silane coupling agent to modify the fiber surface to increase its hydrophilicity, and the physical modification includes stretching and heat treatment; S103, using the high energy of plasma to bombard the fiber surface.

3. The anti-condensation coated fabric with good air permeability according to claim 2, characterized in that: The chemical modification in step S102 is specifically: modifying the fiber surface with a silane coupling agent, wherein one end of the silane coupling agent can react with the hydroxyl group on the fiber surface to form a chemical bond, and the other end contains a functional group that can react with the group in the polymer coating.

4. The anti-condensation coated fabric with good air permeability according to claim 2, characterized in that: The plasma treatment in step S103 is specifically as follows: placing the pretreated fiber in a plasma treatment device, using a set plasma gas, power and treatment time, wherein the plasma gas is at least one of argon, nitrogen and oxygen. During the plasma treatment, high-energy particles bombard the fiber surface to generate active substances of free radicals and ions. The active substances react with functional groups on the fiber surface to form new chemical bonds or change the surface morphology, thereby improving the hydrophilicity of the fiber surface.

5. The anti-condensation coated fabric with good air permeability according to claim 1, characterized in that: The specific steps of embedding the microencapsulated phase change material in step S200 are as follows: S201, prepare microcapsules by in-situ polymerization S202, and embed them into the surface or interior of the fiber by dipping, spinning or spraying, wherein the dipping method specifically involves dipping the fiber into a solution containing microcapsules so that the microcapsules adhere to the fiber surface, the spinning method specifically involves adding microcapsules to the spinning solution during the spinning process so that the microcapsules are embedded into the fiber during the fiber formation process, and the spraying method uses a spraying device to spray the microcapsule solution on the fiber surface to form a microcapsule coating.

6. The anti-condensation coated fabric with good air permeability according to claim 5, characterized in that: The impregnation method proposed in step S202 is specifically as follows: prepare a solution containing microcapsules, evenly disperse the microcapsule powder in an appropriate solvent to form a stable solution, the solvent includes water or an organic solvent, immerse the fiber to be treated in the prepared solution, take out the impregnated fiber for fixation treatment so that the microcapsules are firmly attached to the fiber surface, and the fixation treatment is drying or baking. The spinning method proposed in step S202 is specifically as follows: during the spinning process, add microcapsules to the spinning solution in an appropriate proportion, extrude the spinning solution containing microcapsules into filaments through a spinning machine, and form fibers during stretching and cooling. In this process, the microcapsules are evenly embedded in the internal structure of the fiber. The spraying method proposed in step S202 is specifically as follows: disperse the microcapsule powder in an appropriate solvent to form a stable solution, add a dispersant or stabilizer to the solution to prevent aggregation and precipitation of the microcapsules, and use a spraying device to evenly spray the prepared solution on the fiber surface.

7. The anti-condensation coated fabric with good air permeability according to claim 1, characterized in that: The specific steps of applying the temperature control coating in step S400 are as follows: S401, polymer matrix: the polymer is polyurethane or acrylic resin; S402, phase change material: the phase change material is nano-scale phase change wax, microencapsulated paraffin or hydrated salt; S403, mixing and dispersing: using a high-speed mixer or a planetary mixer, the polymer matrix and the phase change material are mixed, an appropriate amount of dispersant and defoamer are added, and the ultrasonic dispersion equipment is started to utilize the cavitation effect and micro-jet effect of ultrasonic waves to evenly disperse the phase change material nanoparticles in the polymer matrix to form a stable temperature-controlled coating slurry; S304, coating process details: Step 1: Pretreatment: Before coating, the fabric surface is cleaned, including but not limited to removing impurities such as dust and oil; Step 2: The coating is carried out by scraping, wherein the scraping uses a scraper to evenly scrape the temperature control coating slurry onto the fabric surface.