CN114574082A - Conductive leather for automobile interior decoration and preparation method thereof - Google Patents
Conductive leather for automobile interior decoration and preparation method thereof Download PDFInfo
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- CN114574082A CN114574082A CN202210093061.1A CN202210093061A CN114574082A CN 114574082 A CN114574082 A CN 114574082A CN 202210093061 A CN202210093061 A CN 202210093061A CN 114574082 A CN114574082 A CN 114574082A
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- 239000010985 leather Substances 0.000 title claims abstract description 70
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 238000005034 decoration Methods 0.000 title claims abstract description 11
- 239000011248 coating agent Substances 0.000 claims abstract description 91
- 238000000576 coating method Methods 0.000 claims abstract description 91
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000003973 paint Substances 0.000 claims abstract description 46
- 229910021392 nanocarbon Inorganic materials 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 23
- 229920005749 polyurethane resin Polymers 0.000 claims abstract description 22
- 238000004049 embossing Methods 0.000 claims abstract description 21
- 238000005507 spraying Methods 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 20
- 239000002270 dispersing agent Substances 0.000 claims abstract description 19
- 230000037452 priming Effects 0.000 claims abstract description 17
- 239000011230 binding agent Substances 0.000 claims abstract description 5
- 239000006185 dispersion Substances 0.000 claims description 16
- 238000009210 therapy by ultrasound Methods 0.000 claims description 16
- 238000000498 ball milling Methods 0.000 claims description 13
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 239000006229 carbon black Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 239000012752 auxiliary agent Substances 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000006872 improvement Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 10
- 239000002904 solvent Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000007888 film coating Substances 0.000 description 4
- 238000009501 film coating Methods 0.000 description 4
- 229920002635 polyurethane Polymers 0.000 description 4
- 239000004814 polyurethane Substances 0.000 description 4
- 239000011247 coating layer Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000011852 carbon nanoparticle Substances 0.000 description 2
- 238000005562 fading Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- CONKBQPVFMXDOV-QHCPKHFHSA-N 6-[(5S)-5-[[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]methyl]-2-oxo-1,3-oxazolidin-3-yl]-3H-1,3-benzoxazol-2-one Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C[C@H]1CN(C(O1)=O)C1=CC2=C(NC(O2)=O)C=C1 CONKBQPVFMXDOV-QHCPKHFHSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/24—Electrically-conducting paints
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C11/00—Surface finishing of leather
- C14C11/003—Surface finishing of leather using macromolecular compounds
- C14C11/006—Surface finishing of leather using macromolecular compounds using polymeric products of isocyanates (or isothiocyanates) with compounds having active hydrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention relates to conductive leather for automobile interior decoration and a preparation method thereof. A preparation method of conductive leather for automobile interior decoration specifically comprises the following steps: s1, precoating; s2, priming; s3, spraying an anti-sticking layer; s4, embossing; s5, middle coating, wherein the middle coating comprises 34-42% of water, 2-6% of nano carbon powder, 42-58% of polyurethane resin, 5.5-9.5% of dispersing agent and 0.1-0.6% of defoaming agent in percentage by weight; s6, top coating, wherein the top coating comprises, by weight, 18-24% of water, 1-2% of nano carbon powder, 52-62% of polyurethane resin, 1-4% of dispersing agent, 0.1-0.2% of defoaming agent and 13.6-17.6% of binder. According to the invention, through process improvement, the conductive leather with the conductive function is obtained by coating the paint with the nano carbon powder in a reasonable ratio on the surface of the leather blank for multiple times, the body index of a driver can be effectively monitored in a conventional environment, and the blank of the conventional leather is filled.
Description
Technical Field
The invention relates to leather and a preparation method thereof, in particular to conductive leather for automobile interiors and a preparation method thereof, and belongs to the technical field of leather products.
Background
Leather is an ideal material for medium-high grade automotive interior, and is mainly used for decoration covering of parts such as seats, steering wheels, armrests, headrests, door panels, instrument panels and the like in automobiles. At present, although there are many manufacturers for producing leather in China, the types of leather products with functionality are still few. In the conventional situation, when an automobile runs, the body health index value of a driver is directly related to the safety of the whole passenger, and with the gradual enhancement of the comprehensive functional requirements of people on driving and the call of consumer groups, based on the characteristic of low conductive performance of conductive leather, index signals of the body of the driver are collected by the two hands of the driver so as to communicate with a central console electronic device on the automobile to monitor the health condition of the body of the driver at any time, so that the method is an important direction for research of various manufacturers.
Conventionally, conductive leather is generally produced by coating a leather surface with a conductive film coating having good conductivity in a coating step of leather surface treatment, and the conductive film coating generally has conductivity by containing carbon nanoparticles such as carbon black. However, the nano carbon powder has the characteristics of small particle size, large specific surface area and high surface energy, so that the nano carbon powder is easy to be aggregated into large particles in a solvent and is difficult to be stably dispersed in resin solvents such as polyurethane. Therefore, the nano carbon powder has poor stability in resin solvents such as polyurethane and the like, and is easy to agglomerate after being placed, so that the actual performance of the coated conductive leather product is poor. In addition, in the prior art, the solvent with the nano carbon powder is coated on the surface of the leather, so that the surface characteristics of the leather are changed, the color fastness is poor, the color is easy to fade, and the appearance attractiveness of the prior conductive leather product is not ideal.
In conclusion, research and development of the conductive leather for the automotive interior and the preparation method thereof have great significance for the field.
Disclosure of Invention
The invention aims to provide a preparation method of conductive leather for automobile interior decoration, which realizes that the prepared conductive leather has proper conductivity and has better color fastness and coating fastness.
The invention also provides the conductive leather for the automobile interior, which has proper conductivity and better color fastness and coating fastness.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a preparation method of conductive leather for automobile interior decoration specifically comprises the following steps:
s1, pre-coating, namely coating a pre-coating paint on the surface of a leather blank to form a pre-coating layer, wherein the pre-coating paint comprises, by weight, 34-42% of water, 2-6% of nano carbon powder, 42-58% of polyurethane resin, 5.5-9.5% of a dispersing agent and 0.1-0.6% of a defoaming agent;
s2, priming, namely coating a priming paint on the surface of the precoating to form a priming paint, wherein the priming paint comprises 34-42% of water, 2-6% of nano carbon powder, 42-58% of polyurethane resin, 5.5-9.5% of a dispersing agent and 0.1-0.6% of a defoaming agent in percentage by weight;
s3, spraying an anti-sticking layer, namely spraying anti-sticking paint on the surface of the base coat to form the anti-sticking layer;
s4, embossing, namely embossing on an embossing machine, setting the feeding speed of the embossing machine to be 4-6m/min, the temperature in a roller of the embossing machine to be 75-80 ℃, and the pressure to be 130-;
s5, middle coating, namely spraying middle coating paint on the surface of the anti-sticking layer to form a middle coating, wherein the middle coating paint comprises 34-42% of water, 2-6% of nano carbon powder, 42-58% of polyurethane resin, 5.5-9.5% of dispersing agent and 0.1-0.6% of defoaming agent in percentage by weight;
s6, top coating, namely spraying top coating on the surface of the middle coating to form the top coating, wherein the top coating comprises 18-24% of water, 1-2% of nano carbon powder, 52-62% of polyurethane resin, 1-4% of dispersing agent, 0.1-0.2% of defoaming agent and 13.6-17.6% of binder in percentage by weight.
By reasonably configuring the proportion of the polyurethane resin and the nano carbon powder and adjusting the proportion of the polyurethane resin and the nano carbon powder when different layers are coated, the conductivity of the finished conductive leather meets the requirement, the negative effect and the fading influence of the nano carbon powder on the surface characteristic of the leather are reduced, and the conductive leather with excellent color fastness and coating firmness is obtained.
Preferably, the precoating paint, the base paint, the middle paint and the top paint are prepared by ultrasonic treatment and ball milling dispersion.
Preferably, the ultrasonic treatment is carried out in an ultrasonic treatment machine, and an intermittent ultrasonic treatment method is adopted, wherein the pulse amplitude of the ultrasonic treatment machine is set to be 60-80%, the pulse continuous working time is 40-60s, the pulse intermittent time is 5-10s, and the ultrasonic time is 120-160 s.
Preferably, the ball milling dispersion is carried out in a ball milling dispersion machine, the rotating speed of the ball milling dispersion machine is 750-.
Preferably, the release coating comprises 50-60% of water, 39-48% of release resin and 1-2% of auxiliary agent by weight percentage.
Preferably, the nano carbon powder is one or a mixture of several of graphite, graphene and carbon black.
Preferably, the step S1 and the step S2 are respectively carried out in a roller coater, the starting pressure of the roller coater is 6-8Bar, the oven temperature is 100 +/-10 ℃, and the conveying speed is less than or equal to 10 m/min.
Preferably, the steps S3, S5 and S6 are respectively carried out in the coating machine, the starting pressure injection pressure of the coating machine is set to be 0.3-0.5Mar, the rotating disc speed is 10-14r/min, the oven temperature is 100 +/-10 ℃, and the conveying speed is 10-12 m/min.
The conductive leather for the automotive interior, which is prepared by the preparation method, is provided.
The invention has the beneficial effects that:
1. according to the invention, through process improvement, the conductive leather with the conductive function is obtained by coating the paint with the nano carbon powder in a reasonable proportion on the surface of the leather blank for multiple times, the body index of a driver can be effectively monitored in a conventional environment, and the blank of the conventional leather is filled;
2. the physical and chemical indexes, tensile strength performance, mechanical property, conductivity and the like of the conductive leather prepared by the method are excellent.
Detailed Description
The technical solution of the present invention will be further specifically described below by way of specific examples. It is to be understood that the practice of the invention is not limited to the following examples, and that any variations and/or modifications may be made thereto without departing from the scope of the invention.
In the present invention, all parts and percentages are by weight, unless otherwise specified, and the equipment and materials used are commercially available or commonly used in the art. The methods in the following examples are conventional in the art unless otherwise specified.
Conventionally, conductive leather is generally produced by coating a leather surface with a conductive film coating having good conductivity in a coating step of leather surface treatment, and the conductive film coating generally has conductivity by containing carbon nanoparticles such as carbon black. However, the nano carbon powder has the characteristics of small particle size, large specific surface area and high surface energy, so that the nano carbon powder is easy to be aggregated into large particles in a solvent and is difficult to be stably dispersed in resin solvents such as polyurethane. Therefore, the nano carbon powder has poor stability in resin solvents such as polyurethane and the like, and is easy to agglomerate after being placed, so that the actual performance of the coated conductive leather product is poor. In addition, in the prior art, the solvent with the nano carbon powder is coated on the surface of the leather, so that the surface characteristics of the leather are changed, the color fastness is poor, the color is easy to fade, and the appearance attractiveness of the prior conductive leather product is not ideal.
Based on the technical problem, the embodiment of the invention provides a preparation method of conductive leather for automotive interiors, which comprises the following steps:
s1, pre-coating, namely coating a pre-coating paint on the surface of a leather blank to form a pre-coating layer, wherein the pre-coating paint comprises, by weight, 34-42% of water, 2-6% of nano carbon powder, 42-58% of polyurethane resin, 5.5-9.5% of a dispersing agent and 0.1-0.6% of a defoaming agent;
s2, priming, namely coating a priming paint on the surface of the pre-coating to form a priming paint, wherein the priming paint comprises 34-42% of water, 2-6% of nano carbon powder, 42-58% of polyurethane resin, 5.5-9.5% of a dispersing agent and 0.1-0.6% of a defoaming agent in percentage by weight;
s3, spraying an anti-sticking layer, namely spraying anti-sticking paint on the surface of the base coat to form the anti-sticking layer;
s4, embossing, namely embossing on an embossing machine, setting the feeding speed of the embossing machine to be 4-6m/min, the temperature in a roller of the embossing machine to be 75-80 ℃, and the pressure to be 130-;
s5, middle coating, namely spraying middle coating paint on the surface of the anti-sticking layer to form a middle coating, wherein the middle coating paint comprises 34-42% of water, 2-6% of nano carbon powder, 42-58% of polyurethane resin, 5.5-9.5% of dispersing agent and 0.1-0.6% of defoaming agent in percentage by weight;
s6, top coating, namely spraying top coating on the surface of the middle coating to form the top coating, wherein the top coating comprises 18-24% of water, 1-2% of nano carbon powder, 52-62% of polyurethane resin, 1-4% of dispersing agent, 0.1-0.2% of defoaming agent and 13.6-17.6% of binder in percentage by weight.
The inventor finds that the adjustment of the proportion of the polyurethane resin and the nano carbon powder can obtain the resistance result with difference of the final finished product of the conductive leather, and the leather has certain fading and influences the color fastness of the leather and the firmness of a coating due to the characteristics of the nano carbon powder, and the dispersibility of the nano carbon powder in the coating also has important influence on the conductivity of the conductive leather. Specific examples are detailed below, and formulation materials involved in the preparation methods are as follows, and other materials not listed are routine choices in the art.
Nano carbon powder, supplier: jiangyin Lingzhi trade company, Inc.;
polyurethane resin, supplier: baistum trade, Inc.;
dispersant, supplier: ada environmental protection New materials Co;
antifoam, supplier: DENGFE antifoam, Inc.
A preparation method of conductive leather for automobile interior decoration specifically comprises the following steps:
s1, pre-coating, namely coating a pre-coating paint on the surface of a leather blank to form a pre-coating layer, wherein the pre-coating paint comprises, by weight, 34-42% of water, 2-6% of nano carbon powder, 42-58% of polyurethane resin, 5.5-9.5% of a dispersing agent and 0.1-0.6% of a defoaming agent; the method is carried out in a roller coater, the starting pressure of the roller coater is 6-8Bar, the temperature of an oven is 100 +/-10 ℃, and the conveying speed is less than or equal to 10 m/min;
s2, priming, namely coating a priming paint on the surface of the precoating to form a priming paint, wherein the priming paint comprises 34-42% of water, 2-6% of nano carbon powder, 42-58% of polyurethane resin, 5.5-9.5% of a dispersing agent and 0.1-0.6% of a defoaming agent in percentage by weight; the method is carried out in a roller coater, the starting pressure of the roller coater is 6-8Bar, the temperature of an oven is 100 +/-10 ℃, and the conveying speed is less than or equal to 10 m/min;
s3, spraying an anti-sticking layer, namely spraying anti-sticking paint on the surface of the bottom coating to form the anti-sticking layer; the anti-sticking coating comprises 50-60% of water, 39-48% of anti-sticking resin and 1-2% of auxiliary agent by weight percentage; setting the starting pressure of the spraying machine to be 0.3-0.5Mar, the speed of a rotating disc to be 10-14r/min, the temperature of an oven to be 100 +/-10 ℃ and the conveying speed to be 10-12 m/min;
s4, embossing, namely embossing on an embossing machine, setting the feeding speed of the embossing machine to be 4-6m/min, the temperature in a roller of the embossing machine to be 75-80 ℃, and the pressure to be 130-;
s5, middle coating, namely spraying middle coating paint on the surface of the anti-sticking layer to form a middle coating, wherein the middle coating paint comprises 34-42% of water, 2-6% of nano carbon powder, 42-58% of polyurethane resin, 5.5-9.5% of dispersing agent and 0.1-0.6% of defoaming agent in percentage by weight; setting the starting pressure of the spraying machine to be 0.3-0.5Mar, the speed of a rotating disc to be 10-14r/min, the temperature of an oven to be 100 +/-10 ℃ and the conveying speed to be 10-12 m/min;
s6, top coating, namely spraying top coating on the surface of the middle coating to form a top coating, wherein the top coating comprises 18-24% of water, 1-2% of nano carbon powder, 52-62% of polyurethane resin, 1-4% of dispersing agent, 0.1-0.2% of defoaming agent and 13.6-17.6% of binder in percentage by weight; the process is carried out in a spraying machine, the starting pressure of the spraying machine is set to be 0.3-0.5Mar, the speed of a rotating disc is 10-14r/min, the temperature of an oven is 100 +/-10 ℃, and the conveying speed is 10-12 m/min.
The pre-coating paint, the base coating paint, the middle coating paint and the top coating paint are all prepared by ultrasonic treatment and ball milling dispersion. The ultrasonic treatment is carried out in an ultrasonic treatment machine, and an intermittent ultrasonic treatment method is adopted, wherein the pulse amplitude of the ultrasonic treatment machine is set to be 60% -80%, the pulse continuous working time is 40-60s, the pulse intermittent time is 5-10s, and the ultrasonic time is 120-160 s. The ball milling dispersion is carried out in a ball milling dispersion machine, the rotating speed of the ball milling dispersion machine is 750-800r/min, and the dispersion time is 100-110 min. Through ultrasonic treatment and ball milling dispersion, the centrifugal stability of the nano carbon powder in the coating reaches more than 89.2 percent, the dispersion is excellent and is obviously higher than the centrifugal stability of about 70 to 80 percent after the conventional treatment in the field. Based on the centrifugal stability of more than 89.2 percent, the particle agglomeration phenomenon of the nano carbon powder in the coating is overcome, and the color fastness and the coating firmness of the finished product of the conductive leather are improved. The nano carbon powder is one or a mixture of several of graphite, graphene and carbon black, and carbon black is selected in this embodiment.
According to the preparation method and different proportions in table 1, the conductive leather for automobile interiors of examples 1-5 was obtained.
TABLE 1 coating formulation for each example
The conductive leather for automotive interior of each example was tested according to the test standards and methods of table 2.
TABLE 2 test standards and methods
The test results of the conductive leather for automotive interiors of examples 1 to 5 are shown in Table 3.
TABLE 3
| Serial number | Test items | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 |
| 1 | Colour fastness to rubbing | Meets the requirements | Meets the requirements | Meets the requirements | Meets the requirements | Meets the requirements |
| 2 | Light resistance | Grade not less than 4 | Grade not less than 4 | Grade not less than 4 | Grade not less than 4 | Grade not less than 4 |
| 3 | Heat resistance | Grade not less than 4 | Grade 4 or more | Grade not less than 4 | Grade not less than 4 | Grade not less than 4 |
| 4 | Abrasion resistance | Meets the requirements | Meets the requirements | Meets the requirements | Meets the requirements | Meets the requirements |
| 5 | Fastness to adhesion of coating | Meets the requirements | Meets the requirements | Meets the requirements | Meet the need ofTo find | Meets the requirements |
| 6 | Resistance to mold | Meets the requirements | Meets the requirements | Meets the requirements | Meets the requirements | Meets the requirements |
| 7 | Resistance before test | 2.2KΩ | 2.6KΩ | 2.4KΩ | 2.5KΩ | 2.8KΩ |
The conductive leather products prepared by the above embodiments have soft, full and elastic hand feeling, compact leather body, flat and fine grain surface and qualified conductivity, as can be seen from table 3, the conductive leather products prepared by the embodiments have excellent color fastness to rubbing, light fastness, heat resistance, wear resistance and coating adhesion fastness, the resistivity of the products is less than 3K omega, and the conductive leather products completely satisfy the use scene of collecting and transmitting the bioelectric signals by contacting both hands of a driver.
The conductive leather for automobile interior decoration and the preparation method thereof provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. A preparation method of conductive leather for automobile interior decoration is characterized by comprising the following steps: the method specifically comprises the following steps:
s1, precoating, namely coating precoating paint on the surface of a leather blank to form a precoating layer, wherein the precoating paint comprises, by weight, 34-42% of water, 2-6% of nano carbon powder, 42-58% of polyurethane resin, 5.5-9.5% of a dispersing agent and 0.1-0.6% of a defoaming agent;
s2, priming, namely coating a priming paint on the surface of the precoating to form a priming paint, wherein the priming paint comprises 34-42% of water, 2-6% of nano carbon powder, 42-58% of polyurethane resin, 5.5-9.5% of a dispersing agent and 0.1-0.6% of a defoaming agent in percentage by weight;
s3, spraying an anti-sticking layer, namely spraying anti-sticking paint on the surface of the bottom coating to form the anti-sticking layer;
s4, embossing, namely embossing on an embossing machine, setting the feeding speed of the embossing machine to be 4-6m/min, the temperature in a pattern roller of the embossing machine to be 75-80 ℃, and the pressure to be 130-;
s5, middle coating, namely spraying middle coating paint on the surface of the anti-sticking layer to form a middle coating, wherein the middle coating paint comprises 34-42% of water, 2-6% of nano carbon powder, 42-58% of polyurethane resin, 5.5-9.5% of dispersing agent and 0.1-0.6% of defoaming agent in percentage by weight;
s6, top coating, namely spraying top coating on the surface of the middle coating to form the top coating, wherein the top coating comprises 18-24% of water, 1-2% of nano carbon powder, 52-62% of polyurethane resin, 1-4% of dispersing agent, 0.1-0.2% of defoaming agent and 13.6-17.6% of binder in percentage by weight.
2. The method for preparing the conductive leather for automobile interior decoration according to claim 1, wherein: the pre-coating paint, the base coating paint, the middle coating paint and the top coating paint are all prepared by ultrasonic treatment and ball milling dispersion.
3. The method for preparing conductive leather for automobile interiors according to claim 2, wherein: the ultrasonic treatment is carried out in an ultrasonic treatment machine, and an intermittent ultrasonic treatment method is adopted, wherein the pulse amplitude of the ultrasonic treatment machine is set to be 60% -80%, the pulse continuous working time is 40-60s, the pulse intermittent time is 5-10s, and the ultrasonic time is 120-160 s.
4. The method for preparing conductive leather for automobile interiors according to claim 2, wherein: the ball milling dispersion is carried out in a ball milling dispersion machine, the rotating speed of the ball milling dispersion machine is set to be 750-year-round 800r/min, and the dispersion time is set to be 100-year-round 110 min.
5. The method for preparing conductive leather for automobile interiors according to claim 1, wherein: the anti-sticking coating comprises 50-60% of water, 39-48% of anti-sticking resin and 1-2% of auxiliary agent by weight percentage.
6. The method for preparing conductive leather for automobile interiors according to claim 1, wherein: the nano carbon powder is one or a mixture of several of graphite, graphene and carbon black.
7. The method for preparing conductive leather for automobile interiors according to claim 1, wherein: and the step S1 and the step S2 are respectively carried out in a roller coater, the starting pressure of the roller coater is 6-8Bar, the oven temperature is 100 +/-10 ℃, and the conveying speed is less than or equal to 10 m/min.
8. The method for preparing conductive leather for automobile interiors according to claim 1, wherein: the step S3, the step S5 and the step S6 are respectively carried out in the coating machine, the starting pressure injection pressure of the coating machine is set to be 0.3-0.5Mar, the speed of the turntable is 10-14r/min, the temperature of the oven is 100 +/-10 ℃, and the conveying speed is 10-12 m/min.
9. An automotive interior conductive leather manufactured by the method for manufacturing the automotive interior conductive type leather according to any one of claims 1 to 8.
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