CN108314412A - A kind of insulating product and preparation method thereof - Google Patents
A kind of insulating product and preparation method thereof Download PDFInfo
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- CN108314412A CN108314412A CN201810154865.1A CN201810154865A CN108314412A CN 108314412 A CN108314412 A CN 108314412A CN 201810154865 A CN201810154865 A CN 201810154865A CN 108314412 A CN108314412 A CN 108314412A
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- Prior art keywords
- fiber cloth
- insulating product
- cloth bag
- alkali
- insulating
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B30/00—Compositions for artificial stone, not containing binders
- C04B30/02—Compositions for artificial stone, not containing binders containing fibrous materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D29/00—Sacks or like containers made of fabrics; Flexible containers of open-work, e.g. net-like construction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D13/00—Electric heating systems
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Thermal Insulation (AREA)
Abstract
The present invention provides a kind of insulating products, including：The material of fiber cloth bag, one side of fiber cloth bag is high silica glass cloth, and the material of another side is alkali-free glass fiber cloth；Sew the adiabatic material in the fiber cloth bag.Insulating product provided by the invention is in use, by the one side of insulating product high silica glass cloth close to heat storage, by the heat-insulated of adiabatic material, the one side temperature of insulating product huyashi-chuuka (cold chinese-style noodles), that is, alkali-free glass fiber cloth can ensure to be less than 600 DEG C, it is ensured that alkali-free glass fiber cloth brittle will not damage.Insulating product provided by the invention can be used for a long time on energy-storage type electric heating equipment, the covering material smoke-free and tasteless of insulating product and will not be damaged in the environment of 750 DEG C for a long time, while the production cost of insulating product provided by the invention is relatively low.The present invention also provides a kind of adiabatic preparation methods prepared.
Description
Technical field
The present invention relates to Thermo Isolation Technique fields more particularly to a kind of insulating product and preparation method thereof.
Background technology
The weather of haze is reduced, " coal changes according to national prevention and control of air pollution work arrangements to improve air environmental pollution
Electricity " is listed in one of emphasis measure of prevention and control of air pollution.2017, Jing-jin-ji region, the Three Eastern Provinces, the Yangtze River Delta, Pearl River Delta, northwest etc.
Area promotes pilot of town and country " coal changes electricity " work in succession in the whole nation fully under way.The path of science selection " coal changes electricity " has：It is empty
Air supply heat pump, energy-storage type electric heating equipment, energy-storage type power generation cables, large-scale heat reservoir, earth source heat pump, other high-effect energy conservation and environmental protection electricity
Heating equipment, this engineering is by Government-Leading, the national strategy of public subsidies.For the implementation of " coal changes electricity " national strategy,
The environment-friendly heating project that the country is converted into thermal energy with the clean type energy " electricity " is come into being, and existing Beijing-tianjin-hebei Region is implemented most
It is early, it is most widely used one of the area of energy-storage type electric heating equipment.
Energy-storage type electric heating equipment maximum operating temperature is 750 DEG C, and inside needs to use insulating refractory.Con-ventional insulation
Refractory Thermal Conductivity is high, causes energy-storage type electric heating equipment outside wall temperature excessively high, easily causes the problems such as personnel scald.Cause
How this, effectively solve the problems, such as the excessively high heat as those skilled in the art's research of energy-storage type electric heating equipment outside wall temperature
Point.
Invention content
In view of this, the purpose of the present invention is to provide a kind of insulating product and preparation method thereof, it is provided by the invention exhausted
Hot article has thermal insulation performance.
The present invention provides a kind of insulating products, including：
Fiber cloth bag；
Sew the adiabatic material in the fiber cloth bag.
In the present invention, the material of one side of fiber cloth bag is high silica glass cloth, the fiber cloth bag
Another side material be alkali-free glass fiber cloth.In the present invention, the fiber cloth bag preferably uses vagcor
Fiber sewer obtains, that is, uses resurrection glass fibre line to stitch a piece of high silica fiber cloth and a piece of alkali-free glass fiber cloth
Cloth bag is made.In the present invention, 1000 DEG C of the preferred ＞ of the heat resistance of the resurrection glass fibre line；The vagcor
The line footpath of fiber suture is preferably 0.5~1.5mm, more preferably 0.8~1.2mm, most preferably 1mm.In the present invention, described
Resurrection glass fibre line is preferably free of organic principle.
The present invention is not particularly limited the shape of the fiber cloth bag, using rectangular cloth well known to those skilled in the art
Bag.In the present invention, the fiber cloth bag is bag-shaped, shows two larger planes in use, as before
Two sides or upper and lower surface afterwards, a side of fiber cloth bag refers to show during the use of fiber cloth bag one in the present invention
A larger plane, another the larger plane showed during the fiber cloth bag use that another side refers to.
In the present invention, 1000 DEG C of the heat resistance ＞ of the high silica glass cloth.In the present invention, the high silicon
The thickness of oxygen glass fabric is preferably 0.15~0.25mm, more preferably 0.18~0.22mm, most preferably 0.2mm；It is described
The thickness of alkali-free glass fiber cloth is preferably 0.15~0.25mm, more preferably 0.18~0.22mm, most preferably 0.2mm.
In the present invention, the high silica glass cloth and alkali-free glass fiber cloth are preferably free of organic principle.
In the present invention, the adiabatic material preferably includes：
Gas phase SiO2, chopped strand and opacifier.
In the present invention, the gas phase SiO2Bulk density be preferably 0.04~0.06g/cm3, more preferably 0.05g/
cm3；The gas phase SiO2Average grain diameter be preferably 20~30nm, more preferably 22~28nm, most preferably 24~26nm.
In the present invention, the chopped strand is preferably inorganic chopped strand.In the present invention, the inorganic chopped strand
Preferably by the inorfil for the processing that is chopped, more preferably by alkali-free glass fibre, basalt fibre, the silicon of the processing that is chopped
One or more of sour aluminum fiber, polycrystalline mullite fibre and high silica fiber.In the present invention, the chopped strand is flat
Equal diameter is preferably 2~4 μm, more preferably 2.5~3.5 μm, most preferably 3 μm；The average length of the chopped strand is preferred
For 2~5mm, more preferably 3~4mm, most preferably 3.5mm.
In the present invention, the opacifier is preferably infrared light screening agent.In the present invention, the infrared light screening agent is averaged
Grain size is preferably 2~3 μm, more preferably 2.2~2.8 μm, most preferably 2.4~2.6 μm.In the present invention, the infrared screening
Photo etching is preferably selected from one or more of silicon carbide, zirconium English powder, titanium dioxide and carbon black.
In the present invention, gas phase SiO in the adiabatic material2Parts by weight be preferably 60~80 parts, more preferably 65
~75 parts, most preferably 70 parts；The parts by weight of the chopped strand are preferably 5~10 parts, more preferably 6~9 parts, most preferably
It is 7~8 parts；The parts by weight of the opacifier are preferably 15~30 parts, more preferably 20~25 parts.
Insulating product provided by the invention when in use, makes the one side of its high silica glass cloth close to heat storage, passes through
Cross the heat-insulated of the exhausted product of certain thickness nanometer micropore (adiabatic material), the one of huyashi-chuuka (cold chinese-style noodles), that is, alkali-free glass fiber cloth of insulating product
Face temperature can ensure to be less than 600 DEG C, it is ensured that the alkali-free glass fiber cloth of huyashi-chuuka (cold chinese-style noodles) brittle will not damage.
The present invention provides a kind of preparation methods of the insulating product described in above-mentioned technical proposal, including：
By the sewing of adiabatic material in fiber cloth bag, bagged product is obtained；
By the bagged product compression moulding, insulating product is obtained.
In the present invention, the adiabatic material and fiber cloth bag and the adiabatic material and fiber cloth described in above-mentioned technical proposal
Bag is consistent, and details are not described herein.
In the present invention, the preparation method of the adiabatic material is preferably：
By gas phase SiO2, chopped strand and opacifier be uniformly mixed, obtain adiabatic material.
In the present invention, the mixing carries out preferably in homogenizer, and the speed of the stirring is preferably 500~
1000rpm, more preferably 600~900rpm, most preferably 700~800rpm；The time of the stirring is preferably 10~
20min, more preferably 12~18min, most preferably 14~16min.
The present invention does not have special limitation, art technology to the dosage of the adiabatic material and the size of fiber cloth bag
Personnel can be weighed according to actual needs by pre-set product specification, unit weight corresponding weight adiabatic material be put into it is prefabricated
Fiber cloth bag in.
In the present invention, the strands that the sewing uses are preferably resurrection glass fibre line, and the vagcor is fine
Dimension line is consistent with resurrection glass fibre line described in above-mentioned technical proposal, and details are not described herein.In the present invention, it is preferred to by adiabatic
Material is put into fiber cloth bag, is sealed to fiber cloth bag using industrial sewing machine using resurrection glass fibre line, by thermal break
Material sewing is in fiber cloth bag.
In the present invention, the compression moulding preferably uses hydraulic device compression moulding, preferably puts the bagged product
Enter in the mold of hydraulic press.In the present invention, the pressure of the compression moulding is preferably 5~10MPa, more preferably 6~9MPa,
Most preferably 7~8MPa；Dwell time during the compression moulding is preferably 1~3min, more preferably 1.5~
2.5min, most preferably 2min.
Insulating product provided by the invention is a kind of nanometer micropore insulating product, and thermal coefficient is con-ventional insulation fire proofed wood
The 1/4~1/3 of material has splendid insulation effect.The insulating product generally use plastic film of the prior art, self-adhesion aluminium foil and
The modes such as alkali-free glass fiber cloth coat, and energy-storage type electric heating equipment is domestic electric appliance, and at a high temperature of 750 DEG C, plastics are thin
Film and self-adhesion aluminium foil can smolder and give out sharp aroma, seriously affect user experience, pollute the environment simultaneously, and harmful to human is strong
Health；Although alkali-free glass fiber cloth smoke-free and tasteless at high temperature, can gradually melt when temperature in use is more than 600 DEG C, works as temperature
Degree brittle can crush after declining, and can equally influence user experience.Insulating product provided by the invention is used suitable for household electric appliances.
Insulating product provided by the invention holds nanometer micropore insulating product premix, fiber cloth using the fiber cloth bag sewed in advance
The one side of bag is up to 1000 DEG C of high silica glass cloth using heatproof, and another side uses alkali-free glass fiber cloth, uses height
Silica glass sewer, the nanometer micropore that the thermal insulation for being applicable to household electric appliances is prepared by compression moulding are adiabatic
Product.Insulating product provided by the invention can be used for a long time on energy-storage type electric heating equipment, insulating product provided by the invention
It its covering material smoke-free and tasteless and will not be damaged in the environment of 750 DEG C for a long time, while the life of insulating product provided by the invention
It is relatively low to produce cost.
Specific implementation mode
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff it is improved or retouching all other example, shall fall within the protection scope of the present invention.
The size of insulating product prepared by following embodiment of the present invention is 300 × 300 × 20mm, and raw material used is equal
For commercial goods.
Embodiment 1
Weigh the gas phase SiO of 60 parts by weight2, the silicon carbide of 30 parts by weight and the chopped alkali-free glass fibre of 10 parts by weight,
Mixing speed is set as 500rpm, 20min is stirred, obtains mixture；Wherein gas phase SiO2Bulk density is 0.04g/cm3, put down
Equal grain size is 20nm；Silicon carbide average grain diameter is 3 μm；The alkali-free glass fibre average diameter that is chopped is 2 μm, average length 5mm.
The mixed material is weighed by pre-set product specification, unit weight and is put into prefabricated fiber cloth bag；
The fiber cloth bag uses resurrection glass fibre sewer, the one side that the fiber cloth bag arrives to use resurrection glass fibre
Cloth, another side use alkali-free glass fiber cloth；Fiber cloth bag is carried out using resurrection glass fibre line using industrial sewing machine
Sewing sealing, obtains bagged product；Wherein resurrection glass fibre line line footpath is 0.5mm；High silica glass cloth and alkali-free
The thickness of glass fabric is 0.15mm.
The bagged product is put into the mold of hydraulic press, starts hydraulic press, is pressed, prepares and be suitable for
The nanometer micropore insulating product of household electric appliances, the pressure during the compression moulding are 5MPa, dwell time 3min.
Embodiment 2
Weigh the gas phase SiO of 70 parts by weight2, the zirconium English powder of 23 parts by weight and the chopped resurrection glass fibre of 7 parts by weight,
Mixing speed is set as 800rpm, 15min is stirred, obtains mixture；Wherein gas phase SiO2Bulk density is 0.05g/cm3, put down
Equal grain size is 25nm；The average grain diameter of zirconium English powder is 2.5 μm；The average diameter of chopped resurrection glass fibre is 3 μm, average long
Degree is 3mm.
The mixed material is weighed by pre-set product specification, unit weight and is put into prefabricated fiber cloth bag；
The fiber cloth bag uses resurrection glass fibre sewer, the one side of the fiber cloth bag to use high silica glass cloth,
Another side uses alkali-free glass fiber cloth；Fiber cloth bag is sewed using resurrection glass fibre line using industrial sewing machine
Sealing, obtains bagged product；Wherein the line footpath of resurrection glass fibre line is 1mm；High silica glass cloth and alkali-free glass
The thickness of fiber cloth is 0.2mm.
The bagged product is put into the mold of hydraulic press, starts hydraulic press, is pressed, prepares and be suitable for
The nanometer micropore insulating product of household electric appliances, the pressure in pressing process are 8MPa, dwell time 2min.
Embodiment 3
Weigh the gas phase SiO of 80 parts by weight2, the titanium dioxide of 15 parts by weight and the chopped polycrystalline mullite fibre of 5 parts by weight,
Mixing speed is set as 1000rpm, 10min is stirred, obtains mixture；Wherein gas phase SiO2Bulk density is 0.06g/cm3,
Average grain diameter is 30nm；The average grain diameter of titanium dioxide is 2 μm；The average diameter of chopped polycrystalline mullite fibre is 4 μm, average long
Degree is 2mm.
The mixed material is weighed by pre-set product specification, unit weight and is put into prefabricated fiber cloth bag；
The fiber cloth bag uses resurrection glass fibre sewer, the one side of the fiber cloth bag to use high silica glass cloth,
Another side uses alkali-free glass fiber cloth；Fiber cloth bag is sewed using resurrection glass fibre line using industrial sewing machine
Sealing, obtains bagged product；Wherein, resurrection glass fibre line line footpath is 1.5mm；High silica glass cloth and alkali-free glass
The thickness of fiber cloth is 0.25mm.
The bagged product is put into the mold of hydraulic press, starts hydraulic press, is pressed, prepares and be suitable for
The nanometer micropore insulating product of household electric appliances, the pressure during the compression moulding are 10MPa, dwell time 1min.
Comparative example 1
Weigh the gas phase SiO of 70 parts by weight2, the zirconium English powder of 23 parts by weight and the chopped resurrection glass fibre of 7 parts by weight,
Mixing speed is set as 800rpm, 15min is stirred, obtains mixture；Wherein gas phase SiO2Bulk density is 0.05g/cm3, put down
Equal grain size is 25nm；The average grain diameter of zirconium English powder is 2.5 μm；The average diameter of chopped resurrection glass fibre is 3 μm, average long
Degree is 3mm.
The mixed material is weighed by pre-set product specification, unit weight and is put into prefabricated alkali-free glass fibre
In cloth bag；Sewing sealing is carried out using resurrection glass fibre line to fiber cloth bag using industrial sewing machine, obtains bagged product；
Wherein the line footpath of resurrection glass fibre line is 1mm；The thickness of alkali-free glass fiber cloth is 0.2mm.
The bagged product is put into the mold of hydraulic press, starts hydraulic press, is pressed, it is micro- to prepare nanometer
Hole insulating product, the pressure during the compression moulding are 8MPa, dwell time 2min.
Comparative example 2
Weigh the gas phase SiO of 70 parts by weight2, the zirconium English powder of 23 parts by weight and the chopped resurrection glass fibre of 7 parts by weight,
Mixing speed is set as 800rpm, 15min is stirred, obtains mixture；Wherein gas phase SiO2Bulk density is 0.05g/cm3, put down
Equal grain size is 25nm；Zirconium English powder average grain diameter is 2.5 μm；The resurrection glass fibre average diameter that is chopped is 3 μm, and average length is
3mm。
The mixed material is weighed by pre-set product specification, unit weight and is put into prefabricated vagcor fibre
It ties up in cloth bag；Sewing sealing is carried out using resurrection glass fibre line to fiber cloth bag using industrial sewing machine, obtains packed production
Product；Wherein the line footpath of resurrection glass fibre line is 1mm；The thickness of high silica glass cloth is 0.2mm.
The bagged product is put into the mold of hydraulic press, starts hydraulic press, is pressed, it is micro- to prepare nanometer
Hole insulating product, the pressure during the compression moulding are 8MPa, dwell time 2min.
Embodiment 4
Bulk density (drainage detection) is carried out to the insulating product that the embodiment of the present invention and comparative example are prepared, is being stored
(temperature reaches 750 DEG C to fiber cloth situation when electric heating equipment works, and the present invention is implemented after trying out 96h in energy formula electric heating equipment
The one side of high silica glass cloth is contacted to the heater of electric heating equipment when insulating product prepared by example uses) and production cost
It is detected, testing result is as shown in table 1, and table 1 is the performance for the insulating product that the embodiment of the present invention and comparative example are prepared
Testing result.
Table 1 is the performance test results for the insulating product that the embodiment of the present invention and comparative example are prepared
As it can be seen from table 1 the production cost for the insulating product that the embodiment of the present invention is prepared is moderate, it is applied to household
In electrical equipment, covering material will not be brittle damaged, can keep preferable integrality.Insulating product prepared by comparative example 1
Although production cost is relatively low, brittle breakage, seriously affects using effect and experience during use；Comparative example 2 is made
Although covering material will not be brittle damaged during standby insulation product use, production cost is high, and client is difficult to receive, unfavorable
In promoting the use of.
As seen from the above embodiment, the present invention provides a kind of insulating products, including：Fiber cloth bag, the fiber cloth bag
The material of one side is high silica glass cloth, and the material of another side is alkali-free glass fiber cloth；Sewing is described
Adiabatic material in fiber cloth bag.Insulating product provided by the invention is in use, fine by insulating product vagcor
The one side of cloth is tieed up close to heat storage, by the heat-insulated of adiabatic material, the one side temperature of insulating product huyashi-chuuka (cold chinese-style noodles), that is, alkali-free glass fiber cloth
Degree can ensure to be less than 600 DEG C, it is ensured that alkali-free glass fiber cloth brittle will not damage.Insulating product provided by the invention can be long-term
Using on energy-storage type electric heating equipment, the covering material smoke-free and tasteless of insulating product and will not in the environment of 750 DEG C for a long time
Damage, while the production cost of insulating product provided by the invention is relatively low.The present invention also provides a kind of adiabatic preparations prepared
Method.
What has been described above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill of the art
For personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of insulating product, including：
The material of fiber cloth bag, one side of fiber cloth bag is high silica glass cloth, and the material of another side is
Alkali-free glass fiber cloth；
Sew the adiabatic material in the fiber cloth bag.
2. insulating product according to claim 1, which is characterized in that the thickness of the high silica glass cloth is 0.15
~0.25mm.
3. insulating product according to claim 1, which is characterized in that the thickness of the alkali-free glass fiber cloth be 0.15~
0.25mm。
4. insulating product according to claim 1, which is characterized in that it is described thermal insulation material include：
Gas phase SiO2, chopped strand and opacifier.
5. insulating product according to claim 4, which is characterized in that the gas phase SiO2Bulk density be 0.04~
0.06g/cm3；The gas phase SiO2Average grain diameter be 20~30nm.
6. insulating product according to claim 4, which is characterized in that the average diameter of the chopped strand is 2~4 μm,
The average length of the chopped strand is 2~5mm.
7. insulating product according to claim 4, which is characterized in that the opacifier is infrared light screening agent；
The average grain diameter of the infrared light screening agent is 2~3 microns.
8. insulating product according to claim 7, which is characterized in that the infrared light screening agent be selected from silicon carbide, zirconium English powder,
One or more of titanium dioxide and carbon black.
9. a kind of preparation method of insulating product described in claim 1, including：
By the sewing of adiabatic material in fiber cloth bag, bagged product is obtained；
By the bagged product compression moulding, insulating product is obtained.
10. according to the method described in claim 9, it is characterized in that, the pressure of the compression moulding is 5~10MPa；
Dwell time during the compression moulding is 1~3min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810154865.1A CN108314412A (en) | 2018-02-23 | 2018-02-23 | A kind of insulating product and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810154865.1A CN108314412A (en) | 2018-02-23 | 2018-02-23 | A kind of insulating product and preparation method thereof |
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| CN108314412A true CN108314412A (en) | 2018-07-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113619214A (en) * | 2021-08-13 | 2021-11-09 | 重庆康明斯发动机有限公司 | Supercharger heat shield of high-speed diesel engine and preparation method thereof |
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| CN113619214A (en) * | 2021-08-13 | 2021-11-09 | 重庆康明斯发动机有限公司 | Supercharger heat shield of high-speed diesel engine and preparation method thereof |
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