CN115710419A - Thermosetting composite material, preparation method thereof, knob and stove knob - Google Patents
Thermosetting composite material, preparation method thereof, knob and stove knob Download PDFInfo
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- CN115710419A CN115710419A CN202211484840.0A CN202211484840A CN115710419A CN 115710419 A CN115710419 A CN 115710419A CN 202211484840 A CN202211484840 A CN 202211484840A CN 115710419 A CN115710419 A CN 115710419A
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Abstract
The invention provides a thermosetting composite material, a preparation method thereof, a knob and a stove knob, and particularly relates to the technical field of household appliance materials. The thermosetting composite material comprises, by mass, 12-25 parts of unsaturated polyester resin, 15-30 parts of filler, 20-30 parts of aluminum powder, 15-25 parts of heat-conducting chopped carbon fiber, 6-11 parts of low shrinkage agent, 1-1.5 parts of release agent and 0.1-0.4 part of curing agent. This thermosetting composite material adopts aluminium powder and short carbon fiber of heat conduction to arrange mutually, makes the aluminium powder build high-efficient heat conduction passageway between the carbon fiber, has improved the heat conductivility of material all directions, can solve the problem that the plastic material heat conductivity is low. The thermosetting composite material provided by the invention has the advantages that the thermal conductivity is improved to 12.5 w/(m.k), the thermosetting composite material has good thermal conductivity, and the application range of the thermosetting composite material is expanded.
Description
Technical Field
The invention relates to the technical field of household appliance materials, in particular to a thermosetting composite material, a preparation method thereof, a knob and a stove knob.
Background
The knob of the stove is close to the fire source of the stove, so that the heat conductivity of the material is required to be good, and the knob is prevented from burning hands during operation. The knob of the traditional stove is generally manufactured by adopting aluminum alloy and electroplating or an anode process, the material has good heat conductivity, the pencil hardness of the surface is 4H, but oil stains are difficult to clean. The plastic material can also meet the functional requirements through injection molding and spraying processes, but the plastic material has low thermal conductivity, the knob is hot to the hand, the surface hardness is low, the knob is easy to scratch and has no easy cleaning function, oil stains are difficult to clean and the like, so that the plastic material cannot be applied to the cooker knob.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
One objective of the present invention is to provide a thermosetting composite material to alleviate the technical problems of low thermal conductivity of plastic material and hand burning of the knob in the prior art.
The invention also aims to provide a stove knob to solve the technical problems that the surface of the stove knob in the prior art is low in hardness, easy to scratch and clean and oil stains are difficult to clean.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a thermosetting composite material, which comprises the following components in parts by mass:
12-25 parts of unsaturated polyester resin, 15-30 parts of filler, 20-30 parts of aluminum powder, 15-25 parts of heat-conducting chopped carbon fiber, 6-11 parts of low-shrinkage agent, 1-1.5 parts of release agent and 0.1-0.4 part of curing agent.
Optionally, 1 part to 2 parts of dispersant and 2 parts to 3 parts of colorant are also included.
Optionally, the particle size of the aluminum powder is 200 μm-400 μm; preferably 250 μm to 350 μm.
Optionally, the length of the thermally conductive chopped carbon fibers is 5mm to 8mm.
Preferably, the diameter of the thermally conductive chopped carbon fibers is 6 μm to 20 μm.
Optionally, the filler includes at least one of calcium carbonate, carbon black, talc powder, white carbon black, quartz sand, silica powder, and titanium dioxide, and is preferably calcium carbonate.
Preferably, the low shrinkage agent includes at least one of polystyrene, polymethyl methacrylate, polyvinyl acetate, styrene-vinyl acetate copolymer, and ethylene-vinyl acetate copolymer.
Preferably, the release agent is at least one of stearic acid, zinc stearate, calcium stearate and magnesium stearate, and zinc stearate is preferred.
Preferably, the curing agent includes at least one of tert-butyl peroxybenzoate and benzoyl peroxide.
The second aspect of the invention provides a preparation method of the thermosetting composite material, which comprises the steps of uniformly stirring unsaturated polyester resin, 25-35% of filler, 25-35% of aluminum powder, low shrinkage agent, release agent, curing agent, optional dispersing agent and optional coloring agent; and adding the rest filler, the rest aluminum powder and the heat-conducting chopped carbon fibers, uniformly mixing and discharging to obtain the thermosetting composite material.
The third aspect of the invention provides a knob which is mainly obtained by injection molding and hot-press molding of a thermosetting composite material.
Preferably, the mold temperature is 160-180 ℃ during injection molding and hot pressing.
The invention provides a cooking utensil knob, wherein a sand layer, a bottom layer and a surface layer are sequentially arranged on the outer surface layer of the knob from inside to outside.
Optionally, the sand layer is obtained by mainly blasting brown jade sand.
Preferably, the grain size of the brown jade sand is 240-320 meshes.
Preferably, the pressure of the blasting is 0.4MPa to 0.5MPa.
Optionally, the bottom layer is mainly obtained by spray drying KS-718 two-component epoxy coating (solvent type);
preferably, the facing is spray dried predominantly from KS-609 non-stick flexible ceramic paint.
Compared with the prior art, the invention has at least the following beneficial effects:
according to the thermosetting composite material provided by the invention, the aluminum powder and the heat-conducting chopped carbon fibers are matched with each other, and the problem that the heat-conducting chopped carbon fibers are high in heat conductivity along the axial direction of the fibers, but lack heat-conducting channels in the radial direction and poor in heat conductivity is solved. The thermosetting composite material provided by the invention has the advantages that the thermal conductivity is improved to 12.5 w/(m.k), the thermosetting composite material has good thermal conductivity, and the application range of the thermosetting composite material is expanded.
The preparation method of the thermosetting composite material provided by the invention has the advantages of simple process, high degree of mechanization and large batch processing capacity, and is suitable for industrial production.
The knob provided by the invention is produced by an injection molding hot pressing process, and combines a hot pressing molding process and an injection molding process into a whole, so that the one-step molding process shortens the production period and improves the production capacity.
According to the stove knob, the knob material and the bottom layer and surface layer material are combined through the sand layer, the hardness, the oil-repellent and water-repellent capacity of the knob material are improved through the bottom layer and the surface layer, and user experience is good. Because the base material is made of the thermosetting composite material with higher heat conductivity, the temperature rise of the knob of the stove is reduced, and the use safety of the stove is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of aluminum powder and heat-conducting chopped carbon fiber;
FIG. 2 is a schematic view of a cooktop knob provided by the present invention.
Icon: 1-outer surface layer; 2-a sand layer; 3-a bottom layer; 4-surface layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. The components of embodiments of the present invention may be arranged and designed in a wide variety of different configurations.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
According to a first aspect of the present invention, there is provided a thermosetting composite material, comprising the following components in parts by mass:
12-25 parts of unsaturated polyester resin, 15-30 parts of filler, 20-30 parts of aluminum powder, 15-25 parts of heat-conducting chopped carbon fiber, 6-11 parts of low shrinkage agent, 1-1.5 parts of release agent and 0.1-0.4 part of curing agent.
According to the thermosetting composite material provided by the invention, the aluminum powder and the heat-conducting chopped carbon fibers are matched with each other, the problem that the heat-conducting chopped carbon fibers are high in heat conductivity along the axial direction of the fibers, but lack heat-conducting channels in the radial direction and are poor in heat conductivity is solved, the aluminum powder is added into the formula, so that the aluminum powder builds the high-efficiency heat-conducting channels between the heat-conducting chopped carbon fibers, as shown in figure 1, the heat-conducting performance of the material in all directions is improved, and the problem that the heat conductivity of a plastic material is low can be solved. The thermosetting composite material provided by the invention has the advantages that the thermal conductivity is improved to 12.5 w/(m.k), the thermosetting composite material has good thermal conductivity, and the application range of the thermosetting composite material is expanded.
In some embodiments of the invention, the mass parts of unsaturated polyester resin in the thermoset composite material are typically, but not limited to, 12 parts, 14 parts, 16 parts, 18 parts, 20 parts, 22 parts, or 25 parts; the mass fraction of the filler is typically, but not limited to, 15 parts, 20 parts, 25 parts, or 30 parts; the mass parts of the aluminum powder are typically but not limited to 20 parts, 22 parts, 24 parts, 26 parts, 28 parts or 30 parts; the mass parts of the heat-conducting chopped carbon fibers are typically but not limited to 15 parts, 17 parts, 19 parts, 21 parts, 23 parts or 25 parts; the mass part of the low shrinkage agent is typically but not limited to 6 parts, 7 parts, 8 parts, 9 parts, 10 parts or 11 parts; the mass parts of the release agent are typically but not limited to 1 part, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts or 1.5 parts; the mass part of the curing agent is typically, but not limited to, 0.1 part, 0.2 part, 0.3 part, or 0.4 part.
Optionally, 1 part to 2 parts of dispersant and 2 parts to 3 parts of colorant are also included.
Optionally, the particle size of the aluminum powder is 200 μm-400 μm; preferably 250 μm to 350 μm.
When the particle size of the aluminum powder is less than 200 mu m, the heat-conducting property is reduced by the same addition amount of the aluminum powder; when the particle diameter of the powdery aluminum is more than 400 μm, the material becomes brittle and the bending strength decreases with the increase in diameter at the same addition amount. The preferred particle size is 250 μm to 350 μm, within which the thermal conductivity and flexural strength of the material meet the requirements of knob applications.
In some embodiments of the present invention, the aluminum powder typically has a particle size of, but not limited to, 200 μm, 250 μm, 300 μm, 350 μm, or 400 μm.
Optionally, the length of the thermally conductive chopped carbon fibers is 5mm to 8mm.
When the length of the heat-conducting chopped carbon fibers is less than 5mm, the bending strength of the material is reduced along with the reduction of the length; when the length of the heat-conducting chopped carbon fibers is more than 8mm, the bending strength of the material is reduced along with the increase of the length, and the heat-conducting performance is reduced, and the analysis indicates that the carbon fibers are curled in the product, so that the performance is influenced.
In some embodiments of the invention, the length of the thermally conductive chopped carbon fibers is typically, but not limited to, 5mm, 6mm, 7mm, or 8mm.
Preferably, the diameter of the thermally conductive chopped carbon fibers is 6 μm to 20 μm.
When the diameter of the heat-conducting chopped carbon fiber is less than 6 mu m, the production cost of the carbon fiber is increased, and the economic efficiency is low; when the diameter of the heat-conducting chopped carbon fibers is more than 20 μm, the number of carbon fibers per unit cross-sectional area is reduced, a heat-conducting channel cannot be well formed, and the heat-conducting performance is reduced.
In some embodiments of the invention, the thermally conductive chopped carbon fibers typically have a diameter of, but not limited to, 6 μm, 10 μm, 14 μm, or 20 μm.
Optionally, the filler includes at least one of calcium carbonate, carbon black, talc powder, white carbon black, quartz sand, silica powder, and titanium dioxide, and is preferably calcium carbonate.
Preferably, the low shrinkage agent includes at least one of polystyrene, polymethyl methacrylate, polyvinyl acetate, styrene-vinyl acetate copolymer, and ethylene-vinyl acetate copolymer.
Preferably, the release agent is at least one of stearic acid, zinc stearate, calcium stearate and magnesium stearate, and zinc stearate is preferred.
Preferably, the curing agent includes at least one of tert-butyl peroxybenzoate and benzoyl peroxide.
According to the preparation method of the thermosetting composite material provided by the second aspect of the invention, unsaturated polyester resin, 25-35% of filler, 25-35% of aluminum powder, low shrinkage agent, release agent, curing agent, optional dispersing agent and optional coloring agent are uniformly stirred; and adding the rest filler, the rest aluminum powder and the heat-conducting chopped carbon fibers, uniformly mixing and discharging to obtain the thermosetting composite material.
The preparation method of the thermosetting composite material provided by the invention has the advantages of simple process, high degree of mechanization and large batch processing capacity, and is suitable for industrial production.
According to a third aspect of the present invention, there is provided a knob, which is mainly formed by injection molding and hot press molding of a thermosetting composite material.
The knob provided by the invention is produced by an injection molding hot pressing process, and combines a hot pressing molding process and an injection molding process into a whole, so that the one-step molding process shortens the production period and improves the production capacity.
Preferably, the mold temperature is 160-180 ℃ during injection molding and hot pressing.
When the temperature of the mold is lower than 160 ℃, the curing reaction speed is reduced, and the molding period is increased; when the temperature of the die is higher than 180 ℃, the surface fluidity is enhanced, burrs of the product are increased, the appearance is influenced, and the die is difficult to close (the die expands with heat and contracts with cold).
In some embodiments of the invention, the mold temperature is typically, but not limited to, 160 ℃, 165 ℃, 170 ℃, 175 ℃, or 180 ℃.
According to a fourth aspect of the present invention, there is provided a cooking utensil knob, wherein a sand layer 2, a bottom layer 3 and a surface layer 4 are sequentially arranged on an outer surface layer 1 of the knob from inside to outside, as shown in fig. 2.
According to the stove knob, the knob material and the bottom layer and surface layer material are combined through the sand layer, the hardness, the oil-repellent and water-repellent capacity of the knob material are improved through the bottom layer and the surface layer, and user experience is good. Because the base material is made of a thermosetting composite material with higher heat conductivity, the temperature rise of the knob of the stove is reduced, and the use safety of the stove is improved.
Optionally, the sand layer is obtained by mainly blasting brown jade sand.
Preferably, the grain size of the brown jade sand is 240-320 meshes, and the brown jade sand with the grain size can improve the adhesive force of a coating during spraying.
Preferably, the pressure of the blasting is 0.4MPa to 0.5MPa.
In some embodiments of the invention, the pressure of the blasting is typically, but not limited to, 0.4MPa, 0.42MPa, 0.44MPa, 0.46MPa, 0.48MPa, or 0.5MPa.
Optionally, the primer layer is mainly obtained by spray drying of a KS-718 two-component epoxy coating (solvent type);
preferably, the facing is spray dried predominantly from KS-609 non-stick flexible ceramic paint.
Some embodiments of the present invention will be described in detail below with reference to examples. The embodiments described below and the features of the embodiments can be combined with each other without conflict. The raw material suppliers in the following examples and comparative examples are shown in Table 1 below, and raw materials not listed in Table 1 are commercially available.
Table 1 raw material specification table
Example 1
The embodiment provides a thermosetting composite material, which comprises 12kg of unsaturated polyester resin, 22.9kg of calcium carbonate, 30kg of aluminum powder (particle size of 300 microns), 25kg of heat-conducting chopped carbon fiber (length of 6mm and diameter of 13 microns), 6kg of polystyrene, 1.0kg of zinc stearate, 0.1kg of tert-butyl peroxybenzoate, 1.0kg of BKY-W-996 dispersant and 2kg of titanium dioxide.
The preparation method comprises the following specific steps:
1. adding unsaturated polyester resin, polystyrene, a coloring agent, zinc stearate, tert-butyl peroxybenzoate, a dispersing agent, 6kg of calcium carbonate and 10kg of aluminum powder into a kneader and uniformly stirring;
2. adding the remaining calcium carbonate, aluminum powder and heat-conducting short carbon fibers into a kneading machine, uniformly stirring for 45min, and pouring out the dough;
3. and filling the prepared thermosetting composite material into a PE composite film bag to obtain the required thermosetting composite material for later use.
Example 2
The embodiment provides a thermosetting composite material, which comprises the raw materials of 19kg of unsaturated polyester resin, 21.8kg of calcium carbonate, 25kg of aluminum powder (the particle size is 300 mu m), 20kg of heat-conducting chopped carbon fiber (the length is 6mm, the diameter is 13 mu m), 9.5kg of polystyrene, 1.0kg of zinc stearate, 0.2kg of tert-butyl peroxybenzoate, 1.5kg of BKY-W-996 dispersant and 2kg of titanium dioxide.
The preparation method comprises the following specific steps:
1. adding unsaturated polyester resin, polystyrene, a coloring agent, zinc stearate, tert-butyl peroxybenzoate, a dispersing agent, 6kg of calcium carbonate and 8kg of aluminum powder into a kneader and uniformly stirring;
2. adding the remaining calcium carbonate, aluminum powder and heat-conducting short carbon fibers into a kneading machine, uniformly stirring for 45min, and pouring out the dough;
3. and filling the prepared thermosetting composite material into a PE composite film bag to obtain the required thermosetting composite material for later use.
Example 3
The embodiment provides a thermosetting composite material, which comprises 25kg of unsaturated polyester resin, 22.1kg of calcium carbonate, 20kg of aluminum powder (particle size of 300 microns), 15kg of heat-conducting chopped carbon fibers (length of 6mm and diameter of 13 microns), 12kg of polystyrene, 1.5kg of zinc stearate, 0.4kg of tert-butyl peroxybenzoate, 2.0kg of BKY-W-996 dispersant and 2kg of titanium dioxide.
The preparation process comprises the following steps:
1. adding unsaturated polyester resin, polystyrene, a coloring agent, zinc stearate, tert-butyl peroxybenzoate, a dispersing agent, 7kg of calcium carbonate and 6.5kg of aluminum powder into a kneader and uniformly stirring;
2. adding the remaining calcium carbonate, aluminum powder and heat-conducting short carbon fibers into a kneading machine, uniformly stirring for 45min, and pouring out the dough;
3. and filling the prepared thermosetting composite material into a PE composite film bag to obtain the required thermosetting composite material for later use.
Example 4
The present embodiment provides a thermosetting composite material, which is different from embodiment 1 in that talc powder is used to replace calcium carbonate, a low shrinkage agent is polymethyl methacrylate, a curing agent is benzoyl peroxide, and the rest of the raw materials and steps are the same as those in embodiment 1, and are not described herein again.
Example 5
The present example provides a thermosetting composite material, which is different from example 1 in that the particle size of the aluminum powder is 200 μm, and the rest of the raw materials and steps are the same as those in example 1, and are not repeated herein.
Example 6
The present example provides a thermosetting composite material, which is different from example 1 in that the particle size of the aluminum powder is 400 μm, and the rest of the raw materials and steps are the same as those in example 1, and are not repeated herein.
Example 7
The present embodiment provides a thermosetting composite material, which is different from embodiment 1 in that the length of the heat-conducting chopped carbon fibers is 8mm, the diameter is 6 μm, and the rest of the raw materials and steps are the same as those in embodiment 1, and are not described herein again.
Example 8
The present embodiment provides a thermosetting composite material, which is different from embodiment 1 in that the length of the heat-conducting chopped carbon fibers is 5mm, the diameter is 20 μm, and the rest of the raw materials and steps are the same as those in embodiment 1, and are not described herein again.
Comparative example 1
The comparative example provides a thermosetting composite material, which is different from example 1 in that aluminum hydroxide is used for replacing aluminum powder, glass fiber is used for replacing heat-conducting chopped carbon fiber, and other raw materials and steps are the same as those in example 1 and are not described again.
Comparative example 2
The comparative example provides a thermosetting composite material, which is different from example 2 in that aluminum hydroxide is used for replacing aluminum powder, glass fiber is used for replacing heat-conducting chopped carbon fiber, and other raw materials and steps are the same as those in example 2 and are not described again.
Comparative example 3
The comparative example provides a thermosetting composite material, which is different from example 3 in that aluminum hydroxide is used to replace aluminum powder, glass fiber is used to replace heat-conducting chopped carbon fiber, and the rest of the raw materials and steps are the same as those in example 3 and are not repeated.
Comparative example 4
The comparative example provides a thermosetting composite material, which is different from comparative example 1 in that heat-conducting chopped carbon fibers are used for replacing glass fibers, and other raw materials and steps are the same as those in comparative example 1, and are not described again.
Comparative example 5
The comparative example provides a thermosetting composite material, which is different from the comparative example 1 in that aluminum powder is used instead of aluminum hydroxide, and the rest of raw materials and steps are the same as those of the comparative example 1 and are not described again.
Comparative example 6
The present comparative example provides a thermosetting composite material, which is different from comparative example 2 in that the glass fiber is replaced by the heat-conductive chopped carbon fiber, and the rest of the raw materials and steps are the same as those of comparative example 2, and are not described again.
Comparative example 7
The comparative example provides a thermosetting composite material, which is different from the comparative example 2 in that aluminum powder is used instead of aluminum hydroxide, and the rest of the raw materials and steps are the same as those of the comparative example 2, and are not described again.
Comparative example 8
The comparative example provides a thermosetting composite material, which is different from the comparative example 3 in that the glass fiber is replaced by the heat-conducting chopped carbon fiber, and the rest of the raw materials and steps are the same as those in the comparative example 3, and are not repeated.
Comparative example 9
The comparative example provides a thermosetting composite material, which is different from the comparative example 3 in that aluminum powder is used instead of aluminum hydroxide, and the rest of the raw materials and steps are the same as those in the comparative example 3, and are not described again.
Experimental example 1
The thermosetting composite materials obtained in examples 1 to 8 and comparative examples 1 to 9 were molded into a knob by an injection hot-press process at a mold temperature of 165 ℃ to obtain a knob.
Experimental example 2
The knob obtained in the experimental example 1 is subjected to sand blasting treatment, and the 240-320-mesh brown jade sand is used for sand blasting, wherein the sand blasting pressure is set to be 0.5MPa, and the thickness of a sand layer is 15-25 mu m.
Then, using KS-718 two-component epoxy coating (solvent type) of New materials Limited company of Changzhou ear to spray a primer, wherein the thickness of the primer is 15-20 mu m; the finish paint is obtained by spraying KS-609 non-stick flexible ceramic coating, the thickness of the finish paint is 5-8 mu m, and the stove knob is finally obtained.
Test example 1
The knobs obtained in experimental example 1 were subjected to thermal conductivity measurement.
The method for determining the thermal conductivity is carried out according to the standard ASTM D5470.
The data obtained are shown in table 2.
TABLE 2
| Thermal conductivity w/(m.k) | |
| Example 1 | 12.5 |
| Example 2 | 8.2 |
| Example 3 | 3.9 |
| Example 4 | 11.9 |
| Example 5 | 11.3 |
| Example 6 | 12.3 |
| Example 7 | 12.1 |
| Example 8 | 11.6 |
| Comparative example 1 | 0.6 |
| Comparative example 2 | 0.6 |
| Comparative example 3 | 0.6 |
| Comparative example 4 | 1.3 |
| Comparative example 5 | 2.8 |
| Comparative example 6 | 1.0 |
| Comparative example 7 | 2.1 |
| Comparative example 8 | 0.8 |
| Comparative example 9 | 1.3 |
As can be seen from Table 2, the addition of the aluminum powder and the carbon fiber significantly increases the thermal conductivity, and the addition of the aluminum powder or the carbon fiber alone does not significantly improve the thermal conductivity of the material. The higher the addition ratio of the aluminum powder and the carbon fiber, the better the thermal conductivity.
Test example 2
The stove knob obtained in experimental example 2 was subjected to a temperature rise test.
1: the stove is placed in a temperature rise test angle, and the distance between the left side and the rear side of the stove and the wood wall is 150mm.
2: testing air source: 0-1 gas, igniting all burners, opening the burner valve of the stove to the maximum, adjusting the pressure to the maximum test pressure, and selecting a lower limit pot to test the temperature rise.
3: and recording the temperature rise data of the knob after 1h of combustion (recording all temperature rise data of the distribution points, and recording the temperature and humidity of the test environment).
4: and after the test is finished, closing the air source.
The data obtained are shown in table 3.
TABLE 3
| Temperature rise/. Degree.C | |
| Example 1 | 26.6 |
| Example 2 | 30.1 |
| Example 3 | 35.9 |
| Example 4 | 27.3 |
| Example 5 | 28.3 |
| Example 6 | 26.9 |
| Example 7 | 27.2 |
| Example 8 | 27.8 |
| Comparative example 5 | 42.5 |
| Comparative example 6 | 50.4 |
| Comparative example 7 | 45.3 |
| Comparative example 8 | 54.2 |
| Comparative example 9 | 48.0 |
As can be seen from Table 3, the increase of aluminum powder and carbon fiber significantly reduces the temperature rise of the knob, and the addition of aluminum powder or carbon fiber alone does not significantly improve the temperature rise of the knob. The higher the adding proportion of the aluminum powder and the carbon fiber is, the lower the temperature rise of the knob is.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The thermosetting composite material is characterized by comprising the following components in parts by mass:
12-25 parts of unsaturated polyester resin, 15-30 parts of filler, 20-30 parts of aluminum powder, 15-25 parts of heat-conducting chopped carbon fiber, 6-11 parts of low shrinkage agent, 1-1.5 parts of release agent and 0.1-0.4 part of curing agent.
2. The thermosetting composite material according to claim 1, further comprising 1 part to 2 parts of a dispersant and 2 parts to 3 parts of a colorant.
3. The thermosetting composite material according to claim 1 or 2, characterized in that the particle size of the aluminum powder is 200 μ ι η to 400 μ ι η; preferably 250 μm to 350 μm.
4. A thermoset composite material in accordance with claim 1 or 2, wherein the thermally conductive chopped carbon fibers have a length of from 5mm to 8mm;
preferably, the diameter of the thermally conductive chopped carbon fibers is 6 μm to 20 μm.
5. The thermosetting composite material according to claim 1 or 2, characterized in that the filler comprises at least one of calcium carbonate, carbon black, talc, white carbon, quartz sand, silica micropowder and titanium dioxide, preferably calcium carbonate;
preferably, the low shrinkage agent comprises at least one of polystyrene, polymethyl methacrylate, polyvinyl acetate, styrene-vinyl acetate copolymer, and ethylene-vinyl acetate copolymer;
preferably, the release agent is at least one of stearic acid, zinc stearate, calcium stearate and magnesium stearate, and is preferably zinc stearate;
preferably, the curing agent includes at least one of tert-butyl peroxybenzoate and benzoyl peroxide.
6. A method for preparing a thermosetting composite material according to any one of claims 1 to 5, characterized in that an unsaturated polyester resin, 25% to 35% of a filler, 25% to 35% of an aluminum powder, a low shrinkage agent, a mold release agent, a curing agent, an optional dispersing agent and an optional coloring agent are stirred uniformly; and adding the rest of filler, the rest of aluminum powder and the heat-conducting chopped carbon fibers, uniformly mixing and discharging to obtain the thermosetting composite material.
7. A knob which is obtained by injection hot-press molding of the thermosetting composite material as recited in any one of claims 1 to 5 or the thermosetting composite material obtained by the production method as recited in claim 6.
8. A stove knob is characterized in that a sand layer, a bottom layer and a surface layer are sequentially arranged on the outer surface layer of the knob in claim 7 from inside to outside.
9. The cooktop knob of claim 8, wherein the sand layer is primarily grit blasted from brown jade sand;
preferably, the grain diameter of the brown jade sand is 240-320 meshes;
preferably, the pressure of the blasting is 0.4MPa to 0.5MPa.
10. The cooktop knob of claim 8, wherein the bottom layer is primarily spray dried from a KS-718 two-component epoxy (solvent-based);
preferably, the facing is spray dried predominantly from KS-609 non-stick flexible ceramic paint.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103225384A (en) * | 2013-04-19 | 2013-07-31 | 李建生 | High thermal conductivity glass reinforced plastic ground heating floor |
| CN107034427A (en) * | 2017-04-12 | 2017-08-11 | 广州特种承压设备检测研究院 | Alloy coat of boiler heating surface high-temperature corrosion resistance and preparation method thereof |
| CN110903622A (en) * | 2019-11-05 | 2020-03-24 | 珠海格力绿色再生资源有限公司 | BMC composite material for air conditioner electrical appliance box and preparation method thereof |
| CN111500023A (en) * | 2020-05-23 | 2020-08-07 | 湖南东映碳材料科技有限公司 | High-thermal-conductivity composite material and preparation method thereof |
| CN213810727U (en) * | 2020-10-08 | 2021-07-27 | 中山市跃龙厨房电器有限公司 | Stove knob and stove with same |
| JP2022053820A (en) * | 2020-09-25 | 2022-04-06 | 旭有機材株式会社 | Thermosetting resin composition |
-
2022
- 2022-11-24 CN CN202211484840.0A patent/CN115710419A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103225384A (en) * | 2013-04-19 | 2013-07-31 | 李建生 | High thermal conductivity glass reinforced plastic ground heating floor |
| CN107034427A (en) * | 2017-04-12 | 2017-08-11 | 广州特种承压设备检测研究院 | Alloy coat of boiler heating surface high-temperature corrosion resistance and preparation method thereof |
| CN110903622A (en) * | 2019-11-05 | 2020-03-24 | 珠海格力绿色再生资源有限公司 | BMC composite material for air conditioner electrical appliance box and preparation method thereof |
| CN111500023A (en) * | 2020-05-23 | 2020-08-07 | 湖南东映碳材料科技有限公司 | High-thermal-conductivity composite material and preparation method thereof |
| JP2022053820A (en) * | 2020-09-25 | 2022-04-06 | 旭有機材株式会社 | Thermosetting resin composition |
| CN213810727U (en) * | 2020-10-08 | 2021-07-27 | 中山市跃龙厨房电器有限公司 | Stove knob and stove with same |
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