Processing method of heat-storage warm-keeping artificial leather

Abstract

The invention relates to the technical field of artificial leather, in particular to a processing method of heat-storage warm-keeping artificial leather, which comprises the following steps: step 1, preparing base cloth: selecting non-woven fabric or knitted fabric as an inner layer support material to increase softness and comfort; according to the synthetic resin, polyurethane (PU) or polyvinyl chloride (PVC) is selected as a main substrate material, so that the basic structure and the mechanical strength of the artificial leather are ensured; a phase change material (PCM), such as paraffin, fatty acid and other organic matters, for storing and releasing heat; a thermal insulation layer (a rare earth additive layer and a fly ash additive layer); ceramic micro powder such as aluminum oxide, silicon dioxide and the like can improve the thermal conductivity and the stability; carbon fibers or bamboo charcoal fibers enhance the far infrared radiation performance, promote blood circulation and increase the warm keeping effect.

Description

Technical Field

[0001] The invention relates to the technical field of artificial leather, in particular to a method for processing heat-storing and warmth-retaining artificial leather. Background Art

[0002] Artificial leather is a synthetic material that imitates the texture and performance of natural leather and is widely used in clothing, footwear, furniture, automotive interiors, etc. It combines plastic or other synthetic resins with textile fibers through a specific production process to form a product with a similar appearance and feel to real leather;

[0003] It is found in the use of an existing artificial leather that the main structure of the artificial leather is relatively simple, and the heat storage and warmth retention function of the artificial leather is poor, which cannot meet various market demands and needs further improvement. Therefore, the use efficiency and effect of the artificial leather are reduced, resulting in poor practicality. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies of the prior art, the present invention provides a method for processing heat-storing and warm-keeping artificial leather, thereby enhancing the use efficiency and effect of the artificial leather, thereby enhancing the practicality of the method for processing heat-storing and warm-keeping artificial leather.

[0006] (II) Technical solution

[0007] To achieve the above object, the present invention provides the following technical solution: comprising the following steps:

[0008] Step 1: Raw material preparation

[0009] 1.1 Substrate selection

[0010] Base fabric: Use non-woven fabric or knitted fabric as the inner support material to increase softness and comfort;

[0011] Synthetic resin: Choose polyurethane (PU) or polyvinyl chloride (PVC) as the main base material to ensure the basic structure and mechanical strength of artificial leather;

[0012] 1.2 Functional additives

[0013] Phase change materials (PCM): organic substances such as paraffin and fatty acids, used to store and release heat;

[0014] Thermal insulation layer (rare earth additive layer, fly ash additive layer);

[0015] Ceramic powder: such as alumina, silica, etc., to improve thermal conductivity and stability;

[0016] Carbon fiber or bamboo charcoal fiber: enhance far-infrared radiation performance, promote blood circulation, and increase warmth retention effect;

[0017] Step 2: Pretreatment and mixing

[0018] 2.1 Microencapsulation of phase change materials

[0019] Emulsification method: The phase change material is mixed with water or oil, an emulsifier is used to form a stable emulsion, and then microcapsules are made by spray drying;

[0020] 2.2 Additive mixing

[0021] Add microencapsulated phase change material, ceramic powder and carbon fiber into the solvent in a certain proportion and stir evenly to form a stable suspension. This suspension will be used for subsequent coating or impregnation processes;

[0022] Step 3: Multi-layer composite structure construction

[0023] 3.1 Inner layer preparation

[0024] Coating adhesive layer: Coat a thin layer of PU or PVC solution on the surface of non-woven fabric or knitted fabric to form a preliminary adhesive layer;

[0025] Functional coating: spray or immerse the suspension containing functional additives evenly on the layer to allow it to fully absorb and fix these ingredients. A scraper or roller coating equipment can be used to ensure uniform coating;

[0026] 3.2 Intermediate Layer Structure

[0027] Direct coating method:

[0028] A mixture containing a large amount of phase change material microcapsules is directly applied onto the inner layer by spraying or brushing to form an intermediate layer of moderate thickness;

[0029] Controlling coating thickness to ensure adequate thermal storage capacity without compromising flexibility;

[0030] Calendering method:

[0031] The mixed slurry is poured into a mold and pressure is applied by a calender to tightly arrange the material and solidify it into a sheet structure;

[0032] Adjust calendering parameters (such as temperature, pressure and speed) to obtain the desired density and thickness;

[0033] 3.3 Outer protection

[0034] An insulation layer is provided outside the middle layer

[0035] Waterproof and breathable membrane: A specially treated PU or PVC film is placed on top of the thermal measurement layer to provide waterproof, anti-fouling and internal structure protection. This layer can also be printed or embossed as required to increase aesthetics and decorativeness;

[0036] Heat pressing: Use a heat press to firmly bond the outer layer to the middle layer, ensuring there are no bubbles or gaps between the two;

[0037] Step 4: Surface treatment and modification

[0038] 4.1 Nano coating technology

[0039] Immersion method: Place the semi-finished product in a solution containing nanoparticles and soak it for a period of time. After taking it out, dry it naturally or dry it at low temperature.

[0040] Spraying method: Use a precision spray gun to evenly spray nanoparticles on the product surface to form an ultra-thin thermal insulation barrier.

[0041] 4.2 Metal coating (optional)

[0042] For products that require higher reflectivity, a very thin metal film, such as aluminum or silver, can be added to the surface to reflect infrared rays and further enhance the warmth retention effect. Metal coating is usually achieved through vacuum evaporation or magnetron sputtering technology.

[0043] 4.3 Printing and embossing

[0044] Printing patterns or pressing textures on the product surface according to design requirements not only beautifies the product, but also optimizes the local heat conduction path. Screen printing, digital printing or hot stamping can be used;

[0045] Step 5: Finished product testing and quality control

[0046] 5.1 Physical properties test

[0047] Test the physical properties of finished artificial leather in terms of tensile strength, tear strength, abrasion resistance, etc. to ensure that it meets relevant standards and usage requirements.

[0048] Use universal material testing machine, friction and wear tester and other equipment for quantitative analysis.

[0049] 5.2 Evaluation of thermal storage and warmth performance

[0050] By simulating the temperature changes in actual use environment, the heat absorption and release rates of artificial leather under different conditions and their duration are measured to verify the effectiveness of its heat storage and warmth retention function.

[0051] Use tools such as constant temperature boxes and thermocouple sensors to record data and draw temperature curves for comparative analysis.

[0052] 5.3 Security Check

[0053] Check whether the finished products comply with international and domestic regulations on the limits of harmful substances, especially formaldehyde, heavy metals and other ingredients that are potentially harmful to human health.

[0054] Use gas chromatography-mass spectrometry, atomic absorption spectrometer and other instruments for qualitative and quantitative testing; Step 6: Packaging and storage

[0055] Finished artificial leather needs to be properly packaged to avoid damage or contamination during transportation and storage. It is recommended to store it in a dry and ventilated place, away from high temperature and direct sunlight to ensure stable product quality.

[0056] Use plastic film, cardboard boxes or other suitable packaging materials and attach labels with product information and precautions.

[0057] Furthermore, the present invention is improved in that the material of the thermal insulation layer is set to fly ash.

[0058] Furthermore, the present invention has the following improvements: the phase change material can absorb or release a large amount of latent heat within a specific temperature range, and is one of the ideal heat storage materials.

[0059] (III) Beneficial effects

[0060] Compared with the prior art, the present invention provides a method for processing heat-storage and warmth-retaining artificial leather, which has the following beneficial effects:

[0061] The processing method of heat storage and warmth artificial leather adopts the above heat storage and warmth artificial leather processing method. The core heat storage layer of this jacket is composed of microencapsulated phase change material, which can quickly absorb and store heat in a short time, and slowly release heat when the outside temperature drops, providing continuous warmth protection for the wearer. In addition, its surface is treated with nano-coating and has good waterproof and breathable properties;

[0062] Among them, fly ash has several advantages as the choice of artificial leather insulation material. Fly ash is a byproduct of coal-fired power plants and is usually treated as waste. The use of fly ash can reduce production costs because it is more economical than other insulation materials; the use of fly ash helps reduce the impact of industrial waste on the environment, realizes the recycling of waste, and conforms to the principle of circular economy; the fly ash particles are porous inside, and these tiny holes can effectively prevent heat conduction, so it has good thermal insulation properties and can be effectively used as a thermal insulation material; fly ash contains a certain proportion of components such as alumina and silica, which gives it a certain high temperature resistance, which helps to improve the fire safety of artificial leather; the chemical properties are stable and not easy to react with other substances, which increases the durability and service life of artificial leather products; adding fly ash in an appropriate amount can also improve the processing properties of artificial leather, such as increasing the flexibility and tear strength of the product;

[0063] Through the above processing methods, heat storage and warmth artificial leather not only achieves excellent thermal insulation performance, but also maintains other excellent properties of traditional artificial leather. With the advancement of technology and changes in market demand, this type of material will continue to develop in a more intelligent, personalized and environmentally friendly direction, providing more diversified solutions for all walks of life. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 The present invention is a flow chart of a method for processing heat-storing and warmth-retaining artificial leather. DETAILED DESCRIPTION

[0065] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0066] See also Figure 1 , including the following steps:

[0067] Step 1: Raw material preparation

[0068] 1.1 Substrate selection

[0069] Base fabric: Use non-woven fabric or knitted fabric as the inner support material to increase softness and comfort;

[0070] Synthetic resin: Choose polyurethane (PU) or polyvinyl chloride (PVC) as the main base material to ensure the basic structure and mechanical strength of artificial leather;

[0071] 1.2 Functional additives

[0072] Phase change materials (PCM): organic substances such as paraffin and fatty acids, used to store and release heat;

[0073] Thermal insulation layer (rare earth additive layer, fly ash additive layer);

[0074] Ceramic powder: such as alumina, silica, etc., to improve thermal conductivity and stability;

[0075] Carbon fiber or bamboo charcoal fiber: enhance far-infrared radiation performance, promote blood circulation, and increase warmth retention effect;

[0076] Step 2: Pretreatment and mixing

[0077] 2.1 Microencapsulation of phase change materials

[0078] Emulsification method: the phase change material is mixed with water or oil, an emulsifier is used to form a stable emulsion, and then microcapsules are made by spray drying;

[0079] 2.2 Additive mixing

[0080] Add microencapsulated phase change material, ceramic powder and carbon fiber into the solvent in a certain proportion and stir evenly to form a stable suspension. This suspension will be used for subsequent coating or impregnation processes;

[0081] Step 3: Multi-layer composite structure construction

[0082] 3.1 Inner layer preparation

[0083] Coating adhesive layer: Coat a thin layer of PU or PVC solution on the surface of non-woven fabric or knitted fabric to form a preliminary adhesive layer;

[0084] Functional coating: spray or immerse the suspension containing functional additives evenly on the layer to allow it to fully absorb and fix these ingredients. A scraper or roller coating equipment can be used to ensure uniform coating;

[0085] 3.2 Intermediate Layer Structure

[0086] Direct coating method:

[0087] A mixture containing a large amount of phase change material microcapsules is directly applied onto the inner layer by spraying or brushing to form an intermediate layer of moderate thickness;

[0088] Controlling coating thickness to ensure adequate thermal storage capacity without compromising flexibility;

[0089] Calendering method:

[0090] The mixed slurry is poured into a mold and pressure is applied by a calender to tightly arrange the material and solidify it into a sheet structure;

[0091] Adjust calendering parameters (such as temperature, pressure and speed) to obtain the desired density and thickness;

[0092] 3.3 Outer protection

[0093] An insulation layer is provided outside the middle layer

[0094] Waterproof and breathable membrane: A specially treated PU or PVC film is placed on top of the thermal measurement layer to provide waterproof, anti-fouling and internal structure protection. This layer can also be printed or embossed as required to increase aesthetics and decorativeness;

[0095] Heat pressing: Use a heat press to firmly bond the outer layer to the middle layer, ensuring there are no bubbles or gaps between the two;

[0096] Step 4: Surface treatment and modification

[0097] 4.1 Nano coating technology

[0098] Immersion method: Place the semi-finished product in a solution containing nanoparticles and soak it for a period of time. After taking it out, dry it naturally or dry it at low temperature.

[0099] Spraying method: Use a precision spray gun to evenly spray nanoparticles on the product surface to form an ultra-thin thermal insulation barrier.

[0100] 4.2 Metal coating (optional)

[0101] For products that require higher reflectivity, a very thin metal film, such as aluminum or silver, can be added to the surface to reflect infrared rays and further enhance the warmth retention effect. Metal coating is usually achieved through vacuum evaporation or magnetron sputtering technology.

[0102] 4.3 Printing and embossing

[0103] Printing patterns or pressing textures on the product surface according to design requirements not only beautifies the product, but also optimizes the local heat conduction path. Screen printing, digital printing or hot stamping can be used;

[0104] Step 5: Finished product testing and quality control

[0105] 5.1 Physical properties test

[0106] Test the physical properties of finished artificial leather in terms of tensile strength, tear strength, abrasion resistance, etc. to ensure that it meets relevant standards and usage requirements.

[0107] Use universal material testing machine, friction and wear tester and other equipment for quantitative analysis.

[0108] 5.2 Evaluation of thermal storage and warmth performance

[0109] By simulating the temperature changes in actual use environment, the heat absorption and release rates of artificial leather under different conditions and their duration are measured to verify the effectiveness of its heat storage and warmth retention function.

[0110] Use tools such as constant temperature boxes and thermocouple sensors to record data and draw temperature curves for comparative analysis.

[0111] 5.3 Security Check

[0112] Check whether the finished products comply with international and domestic regulations on the limits of harmful substances, especially formaldehyde, heavy metals and other ingredients that are potentially harmful to human health.

[0113] Use gas chromatography-mass spectrometry, atomic absorption spectrometer and other instruments for qualitative and quantitative testing; Step 6: Packaging and storage

[0114] Finished artificial leather needs to be properly packaged to avoid damage or contamination during transportation and storage. It is recommended to store it in a dry and ventilated place, away from high temperature and direct sunlight to ensure stable product quality.

[0115] Use plastic film, cardboard boxes or other suitable packaging materials and attach labels with product information and precautions.

[0116] The processing method of heat storage and warmth artificial leather adopts the above heat storage and warmth artificial leather processing method. The core heat storage layer of this jacket is composed of microencapsulated phase change material, which can quickly absorb and store heat in a short time, and slowly release heat when the outside temperature drops, providing continuous warmth protection for the wearer. In addition, its surface is treated with nano-coating and has good waterproof and breathable properties;

[0117] Among them, fly ash has several advantages as the choice of artificial leather insulation material. Fly ash is a byproduct of coal-fired power plants and is usually treated as waste. The use of fly ash can reduce production costs because it is more economical than other insulation materials; the use of fly ash helps reduce the impact of industrial waste on the environment, realizes the recycling of waste, and conforms to the principle of circular economy; the fly ash particles are porous inside, and these tiny holes can effectively prevent heat conduction, so it has good thermal insulation properties and can be effectively used as a thermal insulation material; fly ash contains a certain proportion of components such as alumina and silica, which gives it a certain high temperature resistance, which helps to improve the fire safety of artificial leather; the chemical properties are stable and not easy to react with other substances, which increases the durability and service life of artificial leather products; adding fly ash in an appropriate amount can also improve the processing properties of artificial leather, such as increasing the flexibility and tear strength of the product;

[0118] Through the above processing methods, heat storage and warmth artificial leather not only achieves excellent thermal insulation performance, but also maintains other excellent properties of traditional artificial leather. With the advancement of technology and changes in market demand, this type of material will continue to develop in a more intelligent, personalized and environmentally friendly direction, providing more diversified solutions for all walks of life.

[0119] As a preference in the above embodiment, the material of the thermal insulation layer is set to be fly ash.

[0120] As a preferred embodiment of the above, the phase change material can absorb or release a large amount of latent heat within a specific temperature range and is one of the ideal heat storage materials.

[0121] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0122] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0123] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0124] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for processing heat-storage and heat-retaining artificial leather, characterized in that it comprises the following steps: Step 1: Raw material preparation 1.1 Substrate selection Base fabric: Use non-woven fabric or knitted fabric as the inner support material to increase softness and comfort; Synthetic resin: Choose polyurethane (PU) or polyvinyl chloride (PVC) as the main base material to ensure the basic structure and mechanical strength of artificial leather; 1.2 Functional additives Phase change materials (PCM): organic substances such as paraffin and fatty acids, used to store and release heat; Thermal insulation layer (rare earth additive layer, fly ash additive layer); Ceramic powder: such as alumina, silica, etc., to improve thermal conductivity and stability; Carbon fiber or bamboo charcoal fiber: enhance far-infrared radiation performance, promote blood circulation, and increase warmth retention effect; Step 2: Pretreatment and mixing 2.1 Microencapsulation of phase change materials Emulsification method: the phase change material is mixed with water or oil, an emulsifier is used to form a stable emulsion, and then microcapsules are made by spray drying; 2.2 Additive mixing Add microencapsulated phase change material, ceramic powder and carbon fiber into the solvent in a certain proportion and stir evenly to form a stable suspension. This suspension will be used for subsequent coating or impregnation processes; Step 3: Multi-layer composite structure construction 3.1 Inner layer preparation Coating adhesive layer: Coat a thin layer of PU or PVC solution on the surface of non-woven fabric or knitted fabric to form a preliminary adhesive layer; Functional coating: spray or immerse the suspension containing functional additives evenly on the layer to allow it to fully absorb and fix these ingredients. A scraper or roller coating equipment can be used to ensure uniform coating; 3.2 Intermediate Layer Structure Direct coating method: A mixture containing a large amount of phase change material microcapsules is directly applied onto the inner layer by spraying or brushing to form an intermediate layer of moderate thickness; Controlling coating thickness to ensure adequate thermal storage capacity without compromising flexibility; Calendering method: The mixed slurry is poured into a mold and pressure is applied by a calender to tightly arrange the material and solidify it into a sheet structure; Adjust calendering parameters (such as temperature, pressure and speed) to obtain the desired density and thickness; 3.3 Outer protection An insulation layer is provided outside the middle layer Waterproof and breathable membrane: A specially treated PU or PVC film is placed on top of the thermal measurement layer to provide waterproof, anti-fouling and internal structure protection. This layer can also be printed or embossed as required to increase aesthetics and decorativeness; Heat pressing: Use a heat press to firmly bond the outer layer to the middle layer, ensuring there are no bubbles or gaps between the two; Step 4: Surface treatment and modification 4.1 Nano coating technology Immersion method: Place the semi-finished product in a solution containing nanoparticles and soak it for a period of time. After taking it out, dry it naturally or dry it at low temperature. Spraying method: Use a precision spray gun to evenly spray nanoparticles on the product surface to form an ultra-thin thermal insulation barrier. 4.2 Metal coating (optional) For products that require higher reflectivity, a very thin metal film, such as aluminum or silver, can be added to the surface to reflect infrared rays and further enhance the warmth retention effect. Metal coating is usually achieved through vacuum evaporation or magnetron sputtering technology. 4.3 Printing and embossing Printing patterns or pressing textures on the product surface according to design requirements not only beautifies the product, but also optimizes the local heat conduction path. Screen printing, digital printing or hot stamping can be used; Step 5: Finished product testing and quality control 5.1 Physical properties test Test the physical properties of finished artificial leather in terms of tensile strength, tear strength, abrasion resistance, etc. to ensure that it meets relevant standards and usage requirements. Use universal material testing machine, friction and wear tester and other equipment for quantitative analysis. 5.2 Evaluation of thermal storage and warmth performance By simulating the temperature changes in actual use environment, the heat absorption and release rates of artificial leather under different conditions and their duration are measured to verify the effectiveness of its heat storage and warmth retention function. Use tools such as constant temperature boxes and thermocouple sensors to record data and draw temperature curves for comparative analysis. 5.3 Security Check Check whether the finished products comply with international and domestic regulations on the limits of harmful substances, especially formaldehyde, heavy metals and other ingredients that are potentially harmful to human health. Use gas chromatography-mass spectrometry, atomic absorption spectrometer and other instruments for qualitative and quantitative testing; Step 6: Packaging and storage Finished artificial leather needs to be properly packaged to avoid damage or contamination during transportation and storage. It is recommended to store in a dry and ventilated place, away from high temperature and direct sunlight to ensure stable product quality. Use plastic film, cardboard boxes or other suitable packaging materials and attach labels with product information and precautions.

2. The method for processing heat-storage and warmth-retaining artificial leather according to claim 1, characterized in that: The material of the heat insulation layer is fly ash.

3. The method for processing heat-storage and warmth-retaining artificial leather according to claim 2, characterized in that: The phase change material can absorb or release a large amount of latent heat within a specific temperature range and is one of the ideal heat storage materials.

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