CN111719319B - High-thermal-conductivity superfine fiber polyurethane synthetic leather and preparation method and application thereof - Google Patents
High-thermal-conductivity superfine fiber polyurethane synthetic leather and preparation method and application thereof Download PDFInfo
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- CN111719319B CN111719319B CN202010442845.1A CN202010442845A CN111719319B CN 111719319 B CN111719319 B CN 111719319B CN 202010442845 A CN202010442845 A CN 202010442845A CN 111719319 B CN111719319 B CN 111719319B
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
- D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0004—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using ultra-fine two-component fibres, e.g. island/sea, or ultra-fine one component fibres (< 1 denier)
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0011—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using non-woven fabrics
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- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
- D06N3/0034—Polyamide fibres
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- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2209/00—Properties of the materials
- D06N2209/06—Properties of the materials having thermal properties
- D06N2209/062—Conductive
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- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2211/00—Specially adapted uses
- D06N2211/12—Decorative or sun protection articles
- D06N2211/26—Vehicles, transportation
- D06N2211/263—Cars
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- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2211/00—Specially adapted uses
- D06N2211/12—Decorative or sun protection articles
- D06N2211/28—Artificial leather
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- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
Abstract
The synthetic leather comprises a non-woven fabric base layer and a leather layer, wherein nylon 6 in the non-woven fabric base layer contains a heat conduction net chain formed by high-heat-conductivity-coefficient filler powder, the weight ratio of the nylon 6 to the high-heat-conductivity-coefficient filler powder is 100:0.1-20, and the heat conduction net chain is connected with the nylon 6 through coupling reaction. According to the high-thermal-conductivity superfine fiber polyurethane synthetic leather provided by the invention, the thermal conductivity of the non-woven fabric base layer with higher thickness ratio is improved, so that the heat transfer efficiency is improved more obviously; the surface pretreatment is carried out on the high-thermal-conductivity-coefficient filler powder by selecting the specific silane coupling agent, the high-thermal-conductivity-coefficient filler powder is selectively enriched in the nylon 6 and is dispersed more uniformly, and the fillers are contacted with each other to form a heat-conducting net chain similar to a net or a chain, so that the heat-conducting property is obviously improved, and the prepared superfine fiber synthetic leather has excellent heat-conducting property.
Description
Technical Field
The application relates to the technical field of artificial leather, in particular to high-thermal-conductivity superfine fiber polyurethane synthetic leather and a preparation method and application thereof.
Background
Superfine fiber synthetic leather, referred to as superfine fiber synthetic leather for short, refers to a kind of artificial leather with a skin layer (usually polyurethane) attached to a fiber base cloth of superfine fiber synthetic leather. The base cloth is usually produced by a non-woven process, fibers are split into superfine fiber synthetic leather fibers smaller than 0.55dtex, the superfine fiber synthetic leather fibers are mutually entangled and tightly distributed to form a fiber structure which is approximately random three-dimensional and distributed, and polyurethane with excellent performance and a micropore structure is filled in the fiber structure.
The superfine fiber synthetic leather has the texture close to real leather, excellent performance and great cost advantage compared with real leather, and is widely applied to the field of automobile interior decoration, such as coating automobile seats, coating automobile steering wheels and the like.
With the trend of upgrading consumption, more and more automobile products are provided with functions of a heatable seat, a self-heating steering wheel and the like, and the common scheme is to add a layer of heating cotton and then coat genuine leather or superfine fiber synthetic leather. In order to achieve the desired temperature of the seat and steering wheel surfaces as quickly as possible and to increase the heating efficiency, the following two approaches are generally used: firstly, the heat conductivity of the cladding material is improved, and secondly, the energy of a heat source is improved. Wherein, promoting cladding material's thermal conductivity has following advantage: 1. the heating efficiency can be improved, 2, the temperature of the heat source can be properly reduced, the energy consumption can be reduced, and 3, the temperature of the heat source is reduced, and the influence of the heat source on the long-term performance of the artificial leather can be reduced.
In the related technology, high thermal conductivity insulating composite powder such as nano silicon carbide, nano aluminum carbide, nano boron carbide, nano zinc oxide, nano aluminum oxide and the like is added into the polyurethane skin layer to endow the synthetic leather with good thermal conductivity. However, the heat-conducting insulating composite powder in the skin layer is only physically filled in the skin layer, a heat-conducting network chain is not formed, the effect of improving the heat-conducting performance of the skin layer is limited, the thickness of the skin layer is smaller than that of the non-woven fabric base layer, and the effect of improving the overall heat-conducting performance of the superfine fiber polyurethane synthetic leather is poor.
Disclosure of Invention
The embodiment of the application provides high-thermal-conductivity superfine fiber polyurethane synthetic leather, and a preparation method and application thereof, so as to solve the technical problem of limited improvement effect on the overall thermal conductivity of the superfine fiber polyurethane synthetic leather in the related technology.
According to the first aspect, the application provides high-thermal-conductivity superfine fiber polyurethane synthetic leather which comprises a non-woven fabric base layer and a leather layer, wherein the leather layer is attached to the non-woven fabric base layer, nylon 6 in the non-woven fabric base layer contains a thermal conductive network chain formed by high-thermal-conductivity filler powder, the weight ratio of the nylon 6 to the high-thermal-conductivity filler powder is 100:0.1-20, the thermal conductive network chain is connected with the nylon 6 through a coupling reaction, the high-thermal-conductivity filler powder is treated by a silane coupling agent and then is subjected to a coupling reaction with the nylon 6, the silane coupling agent in the coupling reaction accounts for 0.5-1.5% of the mass of the high-thermal-conductivity filler powder, and the silane coupling agent is one or more of amino silane coupling agents or isocyanate silane coupling agents.
Among them, nylon 6 is polyamide-6.
In some embodiments, the amino silane coupling agent is one or more selected from the group consisting of A-1100, A-1110, A-1120, A-1130, and A-1170, and the isocyanate silane coupling agent is one or more selected from the group consisting of A-2120 and A-1310.
Wherein, the chemical name of A-1100 is 3-aminopropyltriethoxysilane, the chemical name of A-1110 is 3-aminopropyltrimethoxysilane, the chemical name of A-1120 is 2-aminoethyl-aminopropyltrimethoxysilane, the chemical name of A-1130 is divinyltriaminopropyltrimethoxysilane), the chemical name of A-1170 is bis (3-trimethoxysilylpropyl) amine, the chemical name of A-2120 is aminoethyl-aminopropylmethyldimethoxysilane, and the chemical name of A-1310 is isocyanate propyltriethoxysilane.
In some embodiments, the high thermal conductivity filler powder is one or more of a metal oxide, a metal nitride, or an inorganic nonmetal.
In some embodiments, the high thermal conductivity filler powder is one or more of alumina, zinc oxide, magnesium oxide, aluminum nitride, boron nitride, graphite, silicon carbide.
In some embodiments, the high thermal conductivity filler powder has a particle size of 100nm to 1 μm, so as to satisfy the requirements of non-woven fabric production and processing and surface treatment adapted to silane coupling agent.
In a second aspect, the present application also provides a method for preparing the high thermal conductivity microfiber polyurethane synthetic leather as described above, comprising the steps of:
s1, preparing a silane coupling agent into a solution, performing surface pretreatment on the high-thermal-conductivity-coefficient filler powder, wherein the mass of the silane coupling agent accounts for 0.4-1.5% of the mass of the high-thermal-conductivity filler powder, and standing, precipitating and drying;
s2, melting, extruding and granulating the surface-pretreated high-thermal-conductivity-coefficient filler powder and nylon 6, wherein the pretreated filler powder accounts for 0.1-20% of the mass of the nylon 6;
s3, mixing the prepared nylon 6 containing the filler powder with low-density polyethylene resin, and sequentially performing melt extrusion, spinning, needling, impregnation, solidification, water washing and fiber reduction and opening to prepare the high-thermal-conductivity non-woven fabric base fabric, wherein the weight ratio of the low-density polyethylene resin to the nylon 6 is 0.4-1.2;
and S4, attaching a polyurethane leather layer to the obtained high-thermal-conductivity non-woven fabric base cloth to obtain the high-thermal-conductivity superfine fiber polyurethane synthetic leather.
In some embodiments, the pH of the solution of the silane coupling agent in step S1 is controlled to be between 3 and 5 to increase the hydrolysis rate of the silane coupling agent in water.
In a third aspect, the application also provides a use of the high thermal conductivity superfine fiber polyurethane synthetic leather, which is used for coating a heat source.
In some embodiments, it is used in automotive heatable seats and self-heating steering wheels.
The beneficial effect of this application:
1. according to the high-heat-conductivity superfine fiber polyurethane synthetic leather provided by the invention, the heat conductivity of the base cloth layer with higher thickness ratio is improved, the heat transfer efficiency of the superfine fiber synthetic leather is improved more obviously, and the skin layer can continue to use the traditional formula and process, so that the wear resistance, medium resistance, appearance and the like of the surface of the superfine fiber synthetic leather are not influenced;
2. the silane coupling agent is selected to carry out surface pretreatment on the high-thermal conductivity filler powder, so that the high-thermal conductivity filler powder is more uniform in dispersibility in nylon 6; in the preparation process of the non-woven fabric base layer, the high-thermal conductivity filler is easier to be enriched in the nylon 6 in the melt extrusion spinning process of the nylon 6 and the polyethylene, and the high-thermal conductivity filler is reserved in the nylon 6 superfine fiber synthetic leather to the maximum extent when the polyethylene is extracted in the weight reduction fiber opening process; the addition of the coupling agent improves the effective connection or self-affinity between two substances with different properties, allows more filler dosage in nylon 6, and when the filler dosage reaches higher density, the fillers are contacted with each other to form a heat conduction network chain similar to a net or a chain, thereby obviously improving the heat conduction performance of the non-woven fabric base layer; the coupling agent can improve the interface between the filler and the resin matrix and reduce the thermal resistance at the interface; in the molten mixture of nylon 6/low-density polyethylene, the filler treated by the coupling agent which is particularly hydrophilic to nylon 6 is selected, so that the filler can be more easily and selectively enriched in nylon 6;
3. if the heat conducting performance of the skin layer of the high-heat-conductivity superfine fiber polyurethane synthetic leather provided by the invention is optimized, the heat conducting performance of the superfine fiber synthetic leather can be further improved.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The present invention is described in further detail below by way of examples, but is not limited thereto.
Nylon 6 resin grade in the examples: YH900, supplier: yueyang Ba Ling petrochemical chemical fiber Co.
Low density polyethylene resin grades in the examples: 1I50A, supplier: beijing Yanshan petrochemical Co., Ltd.
Polyurethane resin used for impregnation and skin in examples: JF-S-8030 (aromatic polyurethane which is disclosed by Zhejiang Huafeng synthetic resin Co., Ltd.), JF-S-AH7040 (alicyclic polyurethane which is disclosed by Zhejiang Huafeng synthetic resin Co., Ltd.), JF-S-AH7090 (aliphatic polyurethane which is disclosed by Zhejiang Huafeng synthetic resin Co., Ltd.) JF-A-WV2010 (adhesive layer polyurethane resin which is disclosed by Zhejiang Huafeng synthetic resin Co., Ltd.).
The same polyurethane grade is adopted for the skin layers in the examples and the comparative examples, and the total thickness of the superfine fiber synthetic leather prepared in the examples and the comparative examples is 1.2mm, wherein the non-woven fabric base layer is 1.0mm, and the skin layer is 0.2 mm.
Example 1
S1 surface pretreatment of high-thermal conductivity filler powder
Preparing the A-1100 into an aqueous solution, controlling the pH value of the aqueous solution to be between 3 and 5, adding alumina filler powder into the solution, fully stirring, standing, precipitating and drying, wherein the dosage of the A-1100 is 1.5 percent of the mass of the alumina, and standing, precipitating and drying, wherein the average grain diameter of the alumina is 200 nm.
S2, melting and mixing the filler powder with high thermal conductivity coefficient and surface pretreatment with nylon 6
Carrying out melt extrusion granulation on the pretreated aluminum oxide powder and nylon 6 in a double-screw extruder, wherein the weight parts of the components are as follows:
6100 portion of nylon
Pretreated alumina powder 20 parts
S3 preparation of non-woven base cloth
And (4) mixing the nylon 6 containing the alumina powder prepared in the step (S2) with low-density polyethylene resin, and sequentially carrying out melt extrusion, spinning, needling, impregnation, solidification, water washing and fiber reduction and opening to prepare the high-thermal-conductivity non-woven fabric base fabric. The weight parts of each component are as follows:
nylon 6185 parts containing alumina powder
80 portions of low-density polyethylene
S4 attaching the leather layer to prepare the superfine fiber synthetic leather
And (5) attaching the high-thermal-conductivity non-woven fabric base cloth obtained in the step S3 to a polyurethane leather layer to obtain the high-thermal-conductivity superfine fiber polyurethane synthetic leather.
Example 2
S1 surface pretreatment of high-thermal conductivity filler powder
Preparing the A-1120 into an aqueous solution, controlling the pH value of the aqueous solution to be between 3 and 5, adding aluminum nitride filler powder into the solution, fully stirring, standing, precipitating and drying, wherein the dosage of the A-1120 is 1.5 percent of the mass fraction of the aluminum nitride, standing, precipitating and drying, and the average particle size of the aluminum nitride is 300 nm.
S2, melting and mixing the filler powder with high thermal conductivity coefficient and surface pretreatment with nylon 6
Carrying out melt extrusion granulation on the pretreated aluminum nitride powder and nylon 6 in a double-screw extruder, wherein the weight parts of the components are as follows:
6100 portion of nylon
0.1 part of pretreated aluminum nitride powder
S3 preparation of non-woven base cloth
Mixing the nylon 6 containing the aluminum nitride powder prepared in the step S2 with low-density polyethylene resin, and sequentially carrying out melt extrusion, spinning, needling, dipping, solidification, water washing and fiber reduction and opening to prepare the high-thermal-conductivity non-woven fabric base fabric, wherein the high-thermal-conductivity non-woven fabric base fabric comprises the following components in parts by weight:
680 parts of nylon containing aluminum nitride powder
90 portions of low-density polyethylene
S4, attaching a skin layer to prepare the superfine fiber synthetic leather
And (5) attaching the high-thermal-conductivity non-woven fabric base cloth obtained in the step S3 to a polyurethane leather layer to obtain the high-thermal-conductivity superfine fiber polyurethane synthetic leather.
Example 3
S1 surface pretreatment of high-thermal conductivity filler powder
Preparing A-1310 into an aqueous solution, controlling the pH value of the aqueous solution to be 3-5, adding silicon carbide filler powder into the solution, fully stirring, standing, precipitating and drying, wherein the dosage of A-1310 is 1.5% of the mass fraction of silicon carbide, and standing, precipitating and drying, wherein the average particle size of silicon carbide is 500 nm.
S2, melting and mixing the filler powder with high thermal conductivity coefficient and surface pretreatment with nylon 6
Carrying out melt extrusion granulation on the pretreated silicon carbide powder and nylon 6 in a double-screw extruder, wherein the weight parts of the components are as follows:
6100 portion of nylon
Pretreated silicon carbide powder 5 parts
Preparation of S3 non-woven base cloth
Mixing the nylon 6 containing the silicon carbide powder prepared in the step S2 with low-density polyethylene resin, and sequentially performing melt extrusion, spinning, needling, dipping, solidification, water washing and fiber reduction and opening to prepare the high-thermal-conductivity non-woven fabric base fabric, wherein the high-thermal-conductivity non-woven fabric base fabric comprises the following components in parts by weight:
6105 parts of nylon containing silicon carbide powder
100 portions of low-density polyethylene
S4, attaching a skin layer to prepare the superfine fiber synthetic leather
And (5) attaching the high-thermal-conductivity non-woven fabric base cloth obtained in the step S3 to a polyurethane leather layer to obtain the high-thermal-conductivity superfine fiber polyurethane synthetic leather.
Example 4
S1 surface pretreatment of high-thermal conductivity filler powder
Preparing A-1100 into an aqueous solution, controlling the pH value of the aqueous solution to be between 3 and 5, adding alumina filler powder into the solution, fully stirring, keeping the A-1100 at the use level of 0.5 percent of the mass fraction of alumina, standing, precipitating and drying, wherein the average grain diameter of the alumina is 500 nm;
s2, melting and mixing the filler powder with high thermal conductivity coefficient and surface pretreatment with nylon 6
Carrying out melt extrusion granulation on the pretreated aluminum oxide powder and nylon 6 in a double-screw extruder, wherein the weight parts of the components are as follows:
6100 portion of nylon
Pretreated alumina powder 20 parts
S3 preparation of non-woven base cloth
Mixing the nylon 6 containing the alumina powder prepared in the step S2 with low-density polyethylene resin, and sequentially carrying out melt extrusion, spinning, needling, impregnation, solidification, water washing and fiber reduction and opening to prepare the high-thermal-conductivity non-woven fabric base fabric, wherein the high-thermal-conductivity non-woven fabric base fabric comprises the following components in parts by weight:
nylon 6185 parts containing alumina powder
80 portions of low-density polyethylene
S4, attaching a skin layer to prepare the superfine fiber synthetic leather
And (5) attaching the high-thermal-conductivity non-woven fabric base cloth obtained in the step S3 to a polyurethane leather layer to obtain the high-thermal-conductivity superfine fiber polyurethane synthetic leather.
Example 5
S1 surface pretreatment of high-thermal conductivity filler powder
Preparing A-1170 into water solution, controlling the pH value of the water solution between 3 and 5, adding silicon carbide filler powder into the solution, fully stirring, standing, precipitating and drying, wherein the dosage of A-1170 is 1.5 percent of the silicon carbide. Standing, precipitating and drying. The average grain diameter of the silicon carbide is 500 nm.
S2, melting and mixing the filler powder with high thermal conductivity coefficient and surface pretreatment with nylon 6
Carrying out melt extrusion granulation on the pretreated silicon carbide powder and nylon 6 in a double-screw extruder, wherein the weight parts of the components are as follows:
6100 portion of nylon
Pretreated silicon carbide powder 5 parts
S3 preparation of non-woven base cloth
And (4) mixing the nylon 6 containing the silicon carbide powder prepared in the step (S2) with low-density polyethylene resin, and sequentially carrying out melt extrusion, spinning, needling, dipping, solidification, water washing and fiber reduction and opening to prepare the high-thermal-conductivity non-woven fabric base fabric. The weight parts of each component are as follows:
6105 parts of nylon containing silicon carbide powder
100 portions of low-density polyethylene
S4, attaching a skin layer to prepare the superfine fiber synthetic leather
And (5) attaching the high-thermal-conductivity non-woven fabric base cloth obtained in the step S3 to a polyurethane leather layer to obtain the high-thermal-conductivity superfine fiber polyurethane synthetic leather.
Example 6
S1 surface pretreatment of high-thermal conductivity filler powder
Preparing the A-Link25 into an aqueous solution, controlling the pH value of the aqueous solution to be between 3 and 5, adding alumina filler powder into the solution, fully stirring, standing, precipitating and drying, wherein the dosage of the A-Link25 is 0.5 percent of the mass fraction of the alumina, and standing, precipitating and drying, wherein the average particle size of the alumina is 500 nm.
S2, melting and mixing the filler powder with high thermal conductivity coefficient and surface pretreatment with nylon 6
Carrying out melt extrusion granulation on the pretreated aluminum oxide powder and nylon 6 in a double-screw extruder, wherein the weight parts of the components are as follows:
6100 portion of nylon
Pretreated alumina powder 20 parts
S3 preparation of non-woven base cloth
Mixing the nylon 6 containing the alumina powder prepared in the step S2 with low-density polyethylene resin, and sequentially carrying out melt extrusion, spinning, needling, impregnation, solidification, water washing and fiber reduction and opening to prepare the high-thermal-conductivity non-woven fabric base fabric, wherein the high-thermal-conductivity non-woven fabric base fabric comprises the following components in parts by weight:
nylon 6185 parts containing alumina powder
80 portions of low-density polyethylene
S4, attaching a skin layer to prepare the superfine fiber synthetic leather
And (5) attaching the high-thermal-conductivity non-woven fabric base cloth obtained in the step S3 to a polyurethane leather layer to obtain the high-thermal-conductivity superfine fiber polyurethane synthetic leather.
Comparative example 1
S1 surface pretreatment of high-thermal conductivity filler powder
Preparing a non-amino and non-isocyanate silane coupling agent A-171 into an aqueous solution, controlling the pH value of the aqueous solution to be 3-5, adding aluminum nitride filler powder into the solution, fully stirring, standing, precipitating and drying, wherein the dosage of the A-171 is 1.5 percent of the mass fraction of aluminum nitride, and the average particle size of the aluminum nitride is 300 nm.
S2, melting and mixing the filler powder with high thermal conductivity coefficient and surface pretreatment with nylon 6
Carrying out melt extrusion granulation on the pretreated aluminum nitride powder and nylon 6 in a double-screw extruder, wherein the weight parts of the components are as follows:
6100 portion of nylon
0.1 part of pretreated aluminum nitride powder
S3 preparation of non-woven base cloth
Mixing the nylon 6 containing the aluminum nitride powder prepared in the step S2 with low-density polyethylene resin, and sequentially carrying out melt extrusion, spinning, needling, dipping, solidification, washing and fiber reduction and opening to prepare the non-woven fabric base fabric, wherein the non-woven fabric base fabric comprises the following components in parts by weight:
680 parts of nylon containing aluminum nitride powder
90 portions of low-density polyethylene
S4, attaching a skin layer to prepare the superfine fiber synthetic leather
And (5) attaching the non-woven fabric base cloth in the step S3 to a polyurethane skin layer to obtain the superfine fiber polyurethane synthetic leather.
Comparative example 2
S1 surface pretreatment of high-thermal conductivity filler powder
Preparing a non-amino non-isocyanate silane coupling agent A-171 into an aqueous solution, controlling the pH value of the aqueous solution to be 3-5, adding aluminum nitride filler powder into the solution, fully stirring, standing, precipitating and drying, wherein the dosage of A-1120 is 0.5 percent of the mass fraction of aluminum nitride, and the average particle size of the aluminum nitride is 300 nm.
S2, melting and mixing the filler powder with high thermal conductivity coefficient and surface pretreatment with nylon 6
Carrying out melt extrusion granulation on the pretreated aluminum nitride powder and nylon 6 in a double-screw extruder, wherein the weight parts of the components are as follows:
6100 portion of nylon
0.1 part of pretreated aluminum nitride powder
S3 preparation of non-woven base cloth
Mixing the nylon 6 containing the aluminum nitride powder prepared in the step S2 with low-density polyethylene resin, and sequentially carrying out melt extrusion, spinning, needling, dipping, solidification, washing and fiber reduction and opening to prepare the non-woven fabric base fabric, wherein the non-woven fabric base fabric comprises the following components in parts by weight:
680 parts of nylon containing aluminum nitride powder
90 portions of low-density polyethylene
S4, attaching a skin layer to prepare the superfine fiber synthetic leather
And (5) attaching the non-woven fabric base cloth in the step S3 to a polyurethane skin layer to obtain the superfine fiber polyurethane synthetic leather.
Comparative example 3
S1, melting, extruding and granulating the aluminum nitride powder and nylon 6 in a double-screw extruder, wherein the weight parts of the components are as follows:
6100 portion of nylon
0.1 part of aluminum nitride powder
S2 preparation of non-woven base cloth
And (4) mixing the nylon 6 containing the aluminum nitride powder prepared in the step (S1) with the low-density polyethylene resin, and sequentially carrying out melt extrusion, spinning, needling, impregnation, solidification, water washing and fiber reduction and opening to prepare the non-woven fabric base fabric. The weight parts of each component are as follows:
680 parts of nylon containing aluminum nitride powder
90 portions of low-density polyethylene
S3, attaching a skin layer to prepare the superfine fiber synthetic leather
And (5) attaching the non-woven fabric base cloth in the step S2 to a polyurethane leather layer to obtain the superfine fiber polyurethane synthetic leather with high thermal conductivity.
Comparative example 4
S1 preparation of non-woven base cloth
Mixing nylon 6 and low-density polyethylene resin, and sequentially performing melt extrusion, spinning, needling, impregnation, solidification, washing and fiber reduction and opening to prepare the non-woven fabric base fabric. The weight parts of each component are as follows:
6100 portion of nylon
100 portions of low-density polyethylene
S2, attaching a skin layer to prepare the superfine fiber synthetic leather
And (5) attaching the non-woven fabric base cloth in the step S1 to a polyurethane skin layer to obtain the superfine fiber polyurethane synthetic leather.
The samples of the examples and comparative examples were cut to size 30cm x 30cm and conditioned in standard air for 24 hours and tested using a model YG (B)606D fabric thermal insulation tester according to the national standard GB/T11048, with the following thermal conductivity test results:
table 1: comparison of thermal conductivity of superfine fiber synthetic leather obtained in each example
In conclusion, the surface pretreatment is carried out on the high-thermal-conductivity-coefficient filler powder by adopting the amino or isocyanate silane coupling agent, so that the thermal conductivity of the prepared non-woven fabric base layer can be effectively improved, compared with a comparative example 3 that the high-thermal-conductivity-coefficient filler powder is not subjected to the surface treatment by the coupling agent, the superfine fiber polyurethane synthetic leather prepared by carrying out the surface treatment on the high-thermal-conductivity-coefficient filler powder by the coupling agent has better thermal conductivity, the coupling agent ensures that the dispersibility of the high-thermal-conductivity-coefficient filler powder in nylon 6 is better and uniform, and in the preparation process of the non-woven fabric base layer, the polyethylene is easier to be enriched in the nylon 6, and the polyethylene can be retained to the maximum extent when the polyethylene is extracted in the fiber reducing and opening process; the amino silane coupling agent and the isocyanate silane coupling agent are adopted in the embodiment 1 and the embodiment 2, and compared with the non-amino silane coupling agent or the non-isocyanate silane coupling agent adopted in the comparative example 1, the improvement effect is better; embodiment 1 and embodiment 4 adopt the same experimental conditions except that adding different amount of coupling agent to prepare superfine fiber synthetic leather, the coefficient of heat conductivity of both two compares and has obvious difference, it is in certain extent, when adding more coupling agent, can effectively increase the filling amount of high coefficient of heat conductivity filler powder in nylon 6 for contact each other between the high coefficient of heat conductivity filler powder granule in the non-woven fabrics base course, form netted or chain-like heat conduction network chain, thereby can show the heat conductivility that promotes the non-woven fabrics base course, thereby promote the heat conductivility of superfine fiber synthetic leather.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The utility model provides a high heat conduction superfine fiber polyurethane synthetic leather, includes non-woven fabrics basic unit and cortex, the cortex is laminated on non-woven fabrics basic unit, its characterized in that:
the nylon 6 in the non-woven fabric base layer contains a heat conduction network chain formed by high-heat-conductivity-coefficient filler powder, the weight ratio of the nylon 6 to the high-heat-conductivity-coefficient filler powder is 100:0.1-20, the heat conduction network chain and the nylon 6 are connected through coupling reaction, the high-heat-conductivity-coefficient filler powder is treated by a silane coupling agent and then is subjected to coupling reaction with the nylon 6, the silane coupling agent in the coupling reaction accounts for 0.4-1.5% of the mass of the high-heat-conductivity-coefficient filler powder, and the silane coupling agent is an aminosilane coupling agent or an isocyanate silane coupling agent.
2. The high thermal conductivity ultrafine fiber polyurethane synthetic leather according to claim 1, wherein: the amino silane coupling agent is one or more of A-1100, A-1110, A-1120, A-1130, A-1170 and A-2120, and the isocyanate silane coupling agent is one or more of A-1310 and A-LINK 25.
3. The high thermal conductivity ultrafine fiber polyurethane synthetic leather according to claim 1, wherein: the high-thermal conductivity filler powder is one or more of metal oxide, metal nitride and inorganic nonmetal.
4. The high thermal conductivity ultrafine fiber polyurethane synthetic leather according to claim 3, wherein: the high-thermal conductivity coefficient filler powder is one or more of aluminum oxide, zinc oxide, magnesium oxide, aluminum nitride, boron nitride, graphite and silicon carbide.
5. The high thermal conductivity ultrafine fiber polyurethane synthetic leather according to claim 1, wherein: the particle size range of the high-thermal conductivity filler powder is 100nm-1 mu m.
6. A method for preparing the high thermal conductivity microfiber polyurethane synthetic leather according to any one of claims 1 to 5, wherein: the method comprises the following steps:
s1, preparing a silane coupling agent into a solution, pretreating the high-thermal-conductivity-coefficient filler powder, wherein the mass of the silane coupling agent accounts for 0.4-1.5% of that of the high-thermal-conductivity filler powder, and standing, precipitating and drying;
s2, melting, extruding and granulating the surface-pretreated high-thermal-conductivity-coefficient filler powder and nylon 6, wherein the pretreated filler powder accounts for 0.1-20% of the mass of the nylon 6;
s3, mixing the prepared nylon 6 containing the filler powder with low-density polyethylene resin, and sequentially performing melt extrusion, spinning, needling, impregnation, solidification, water washing and fiber reduction and opening to prepare the high-thermal-conductivity non-woven fabric base fabric, wherein the weight ratio of the low-density polyethylene resin to the nylon 6 is 0.4-1.2;
and S4, attaching a polyurethane leather layer to the obtained high-thermal-conductivity non-woven fabric base cloth to obtain the high-thermal-conductivity superfine fiber polyurethane synthetic leather.
7. Use of the high thermal conductivity microfiber polyurethane synthetic leather according to any one of claims 1 to 5, wherein: which is used to encapsulate the heat source.
8. Use according to claim 7, characterized in that: the heating device is used for a heatable seat and a self-heating steering wheel of an automobile.
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| CN113818255B (en) * | 2021-09-09 | 2023-08-22 | 东风汽车集团股份有限公司 | Base cloth and synthetic leather, and preparation method and application thereof |
| CN114481638B (en) * | 2021-12-29 | 2024-02-02 | 合肥科天水性科技有限责任公司 | Electrically-heatable waterborne polyurethane clothing leather and preparation method thereof |
| CN114395841B (en) * | 2022-01-06 | 2023-08-29 | 深圳市威仕度服装有限公司 | Composite flame-retardant fabric and protective clothing based on same |
| CN114892410A (en) * | 2022-05-23 | 2022-08-12 | 东风汽车集团股份有限公司 | Superfine fiber synthetic leather capable of being rapidly cooled, and preparation method and application thereof |
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