CN107245217B - Preparation method of carbon fiber reinforced phenolic resin gear - Google Patents
Preparation method of carbon fiber reinforced phenolic resin gear Download PDFInfo
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- CN107245217B CN107245217B CN201710389258.9A CN201710389258A CN107245217B CN 107245217 B CN107245217 B CN 107245217B CN 201710389258 A CN201710389258 A CN 201710389258A CN 107245217 B CN107245217 B CN 107245217B
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- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/06—Elements
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- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
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- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/346—Clay
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- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
- D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
- D01F9/12—Carbon filaments; Apparatus specially adapted for the manufacture thereof
- D01F9/14—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments
- D01F9/145—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from pitch or distillation residues
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
- D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
- D01F9/12—Carbon filaments; Apparatus specially adapted for the manufacture thereof
- D01F9/14—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments
- D01F9/16—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from products of vegetable origin or derivatives thereof, e.g. from cellulose acetate
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
- D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
- D01F9/12—Carbon filaments; Apparatus specially adapted for the manufacture thereof
- D01F9/14—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments
- D01F9/20—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products
- D01F9/21—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F9/22—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyacrylonitriles
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Organic Chemistry (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Gears, Cams (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Nonwoven Fabrics (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
The invention discloses a preparation method of a carbon fiber reinforced phenolic resin gear, which comprises the steps of firstly carding and needling viscose, asphalt or polyacrylonitrile short fiber to form a needled felt, and then carbonizing at high temperature to form a carbon fiber needled felt; and then putting the carbon fiber needled felt into a gear mold, and finally pouring the phenolic resin system into the mold for curing to form the carbon fiber reinforced phenolic resin gear. The gear has excellent performances of high temperature resistance, chemical corrosion resistance, high strength, high fracture toughness, self-lubrication, easy processing and the like, and can be widely applied to the fields of aerospace, semiconductors, automobile parts, petrifaction, machinery, medical treatment, electronic and electrical appliances and the like.
Description
The technical field is as follows:
the invention relates to the technical field of manufacturing of mechanical parts, in particular to a preparation method of a carbon fiber reinforced phenolic resin gear.
Background art:
gears are common parts in mechanical transmission, the materials for gear processing mainly comprise metal materials, plastics, composite materials and the like, and metal gears have the problems of not only wear resistance but also friction and noise. With the rapid development of the plastic industry, plastic gears have replaced metal gears in many situations. The plastic gear has the advantages of low manufacturing cost, light weight, low noise, chemical corrosion resistance, self lubrication and the like. But also has the defects of low elastic modulus, low mechanical strength, poor thermal conductivity, large thermal expansion coefficient and the like, and limits the application of the plastic gear in high-load and high-speed occasions.
The invention content is as follows:
the invention provides a preparation method of a carbon fiber reinforced phenolic resin gear which is wear-resistant, heat-resistant, corrosion-resistant, self-lubricating and stable in size, and aims to solve the problems in the prior art.
The technical scheme adopted by the invention is as follows: a preparation method of a carbon fiber reinforced phenolic resin gear comprises the following steps:
1. firstly, carding and needling the viscose, asphalt or polyacrylonitrile short fiber to form a needled felt;
2. then carbonizing at the high temperature of more than 400-3000 ℃ to form a carbon fiber needled felt;
3. and then placing the carbon fiber needled felt into a gear mold, pouring the phenolic resin system into the mold for mold pressing, curing at the temperature of 240-350 ℃, and taking out after 0.5-4 hours of curing time to form the carbon fiber reinforced phenolic resin gear.
Furthermore, the length of the viscose, asphalt or polyacrylonitrile short fiber is 3-10cm, and the needling density of the needled felt prepared from the viscose, asphalt or polyacrylonitrile short fiber is 50-200 needles/cm2The surface density of the needled felt is 400-5000 g/m2。
Further, the weight percentage of the fiber is 30-60%, and the weight percentage of the phenolic resin system is 40-70%.
Further, the carbon phenolic resin system comprises one or more of montmorillonite, nano carbon powder, carbon nano tubes, graphite, molybdenum disulfide, silicon dioxide and titanium dioxide fillers, and the weight percentage of the fillers is 0-30%.
Further, the prepared carbon fiber reinforced phenolic resin gear is a spur gear, a bevel gear, a herringbone gear or a face gear.
Further, the second step specifically comprises the following steps:
1. carding viscose, pitch or polyacrylonitrile short fiber, and pre-needling to form a needled felt web;
2. putting the needle felt cotton net into a needle machine of a needle punching mold for needle punching to form needle felts with different shapes;
3. carbonizing the needled felt at the high temperature of more than 400-3000 ℃ to form the carbon fiber needled felt.
Furthermore, the carbon fiber needled felt and thermosetting resin are prepared into a thermosetting composite material together, and the thermosetting composite material is prepared into a thermoplastic composite material together with PE-polyethylene, PP-polypropylene, PVC-polyvinyl chloride, PS-polystyrene, PA-polyamide, POM-polyformaldehyde, PC-polycarbonate, PEEK-polyetheretherketone, polyphenyl ether, polysulfone, rubber and the like.
The invention has the following beneficial effects: the phenolic resin has the performances of high temperature resistance, flame retardance, ablation resistance, corrosion resistance and the like, and the composite material prepared from the phenolic resin and the carbon fiber felt has the excellent performances of high temperature resistance, ablation resistance, heat insulation and the like, so that the composite material gear prepared from the phenolic resin has the excellent performances of high temperature resistance, chemical corrosion resistance, high strength, high fracture toughness, self lubrication, easiness in processing and the like, and can be widely applied to the fields of aerospace, semiconductors, automobile parts, petrifaction, machinery, medical treatment, electronic and electric appliances and the like.
The specific implementation mode is as follows:
the invention provides a preparation method of a carbon fiber reinforced phenolic resin gear, which comprises the following steps: firstly, carding and needling the viscose, asphalt or polyacrylonitrile short fiber to form a needled felt; then carbonizing at the high temperature of more than 400-3000 ℃ to form a carbon fiber needled felt; then putting the carbon fiber needled felt into a gear mold; and finally, pouring the phenolic resin system into a mold for mold pressing, curing at the temperature of 240-350 ℃, and taking out after the curing time is 0.5-4 hours to form the carbon fiber reinforced phenolic resin gear.
The length of the viscose, asphalt or polyacrylonitrile short fiber is generally 3-10cm, and the needling density of the needled felt prepared from the viscose, asphalt or polyacrylonitrile short fiber is generally 50-200 needles/cm2The surface density of the needled felt is 400-5000 g/m2。
In the carbon fiber reinforced phenolic resin gear, the weight percentage of carbon fibers is 30-60%, and the weight percentage of a phenolic resin system is 40-70%. The phenolic resin system comprises one or more fillers, and the weight percentage of the fillers is 0-30%. The filler can be one or more of montmorillonite, nano carbon powder, carbon nano tube, graphite, molybdenum disulfide, silicon dioxide, titanium dioxide and the like.
The carbon fiber reinforced phenolic resin gear can be a cylindrical straight gear, a bevel gear, a herringbone gear, a face gear and the like.
The preparation method of the carbon fiber reinforced phenolic resin gear provided by the invention comprises the following specific steps of: carding viscose, asphalt or polyacrylonitrile short fiber, pre-needling the cotton to form a web, and preparing the web into a needled felt in the shape of a sheet, a cylinder, a cone and other revolution bodies according to the actual application condition, or preparing the needled felt in an irregular shape; then carbonizing at the high temperature of above 400-3000 ℃ to form the carbon fiber needled felt.
The carbon fiber needled felt can be directly used for heat preservation, heat insulation, electromagnetic shielding and the like, can also be prepared into a thermosetting composite material together with thermosetting resins such as phenolic resin, epoxy resin, vinyl resin and the like, and can also be prepared into a thermoplastic composite material together with PE-polyethylene, PP-polypropylene, PVC-polyvinyl chloride, PS-polystyrene, PA-polyamide, POM-polyformaldehyde, PC-polycarbonate, PEEK-polyetheretherketone, polyphenyl ether, polysulfone, rubber and the like.
The invention is illustrated in detail by the following examples
Example 1: a preparation method of a carbon fiber reinforced phenolic resin cylindrical spur gear comprises the following manufacturing processes:
1. firstly, 5cm long viscose staple fiber is combed and needled to form 5000g/m2Needle punched felt with a needle punching density of 200 needles/cm2Preparing viscose fiber needled felt;
2. and putting the viscose needled felt into a carbonization furnace, and carbonizing at 400 ℃ to form the carbon fiber needled felt.
3. Putting the carbon fiber needled felt into a cylindrical straight gear mold, and then mixing phenolic resin and molybdenum disulfide powder according to the weight ratio of 7: 3, and pouring the mixture into a mold, wherein the weight ratio of a resin system accounts for 40%, performing mold pressing, heating to 240 ℃, and taking out after 4 hours to form the carbon fiber reinforced phenolic resin cylindrical spur gear.
Example 2: a preparation method of a carbon fiber reinforced phenolic resin bevel gear comprises the following steps:
1. firstly, carding and needling reinforcing are carried out on 3cm long asphalt short fibers to form 400g/m2Needle punched felt with a needle punching density of 50 needles/cm2And preparing the asphalt fiber needled felt.
2. And putting the asphalt fiber needled felt into a carbonization furnace, and carbonizing at 3000 ℃ to form the carbon fiber needled felt.
3. Putting the carbon fiber needled felt into a bevel gear die, and then mixing phenolic resin and montmorillonite according to the weight ratio of 8: 2, and pouring the mixture into a mold, wherein the weight ratio of a resin system accounts for 50%, performing mold pressing, heating to 350 ℃, and taking out after 0.5 hour to form the carbon fiber reinforced phenolic resin bevel gear.
Example 3: a preparation method of a carbon fiber reinforced phenolic resin face gear comprises the following manufacturing processes:
1. firstly, 10cm long polyacrylonitrile short fiber is formed into 2000g/m after carding, needling and reinforcing2Needled felt with needling density of 100 needles/cm2And preparing the polyacrylonitrile fiber needled felt.
2. And putting the polyacrylonitrile fiber needled felt into a carbonization furnace, and carbonizing at 1400 ℃ to form the carbon fiber needled felt.
3. Putting the carbon fiber needled felt into a face gear mold, and then mixing phenolic resin and silicon dioxide powder according to the weight ratio of 9: 1, and pouring the mixture into a mold, wherein the weight ratio of a resin system accounts for 70%, performing mold pressing, heating to 300 ℃, and taking out after 2 hours to form the carbon fiber reinforced phenolic resin face gear.
Example 4: a preparation method of a cylindrical carbon fiber needled felt comprises the following steps:
1. firstly, 6cm long viscose staple fiber is formed into 50g/m after cotton carding, pre-needling and reinforcement2Needle punching a felt web.
2. 50g/m2The needled felt web is put into a needling machine of a cylindrical needling mould with the width of 1m and the diameter phi of 90mm for needling, and the cylindrical needled felt with the inner diameter phi of 90mm and the thickness of 3cm is formed after continuous circulation web needling.
3. And (3) putting the cylindrical needled felt into a carbonization furnace, and carbonizing at 900 ℃ to form the cylindrical carbon fiber needled felt.
Example 5: a preparation method of a conical carbon fiber needled felt comprises the following steps:
1. firstly, 8cm long polyacrylonitrile short fiber is formed into 200g/m after carding, pre-needling and reinforcement2Needle punching a felt web.
2. 200g/m2And (3) putting the needled felt web into a needling machine of a needling mould with the width of 0.5m and the diameter phi of the conical bottom of 50mm for needling, and forming the conical needled felt with the inner diameter phi of 50mm and the thickness of 2cm after continuously circulating web needling.
3. And (3) putting the conical needled felt into a carbonization furnace, and carbonizing at 1800 ℃ to form the conical carbon fiber needled felt.
Example 6: a preparation method of a special-shaped carbon fiber needled felt comprises the following steps:
1. firstly, carding and pre-needling reinforcing 4cm long asphalt short fibers to form 100g/m2Needle punching a felt web.
2. The mixing ratio is 100g/m2And (3) putting the needled felt cotton net into a needling mould needling machine which is provided with a cylinder and a cone with the width of 0.8m and has a diameter phi of 80mm and a length of 0.4m, and a bottom diameter phi of 80mm and a length of 0.4 m. And forming the special-shaped needled felt with the thickness of 5cm after continuously circulating cotton net needling.
3. And (3) putting the special-shaped needled felt into a carbonization furnace, and carbonizing at 2800 ℃ to form the special-shaped carbon fiber needled felt.
Example 7: a cylindrical carbon fiber reinforced epoxy resin composite material is prepared by the following steps:
1. firstly, carding and pre-needling reinforcing 7cm long viscose staple fiber to form 300g/m2Needle felt cottonAnd (3) a net.
2. Mixing at 300g/m2The needled felt web is put into a needling machine of a cylindrical needling mould with the width of 1.5m and the diameter phi of 200mm for needling, and the cylindrical needled felt with the inner diameter phi of 200mm and the thickness of 6cm is formed after continuous circulation web needling.
3. And (3) putting the cylindrical needled felt into a carbonization furnace, and carbonizing at 1300 ℃ to form the cylindrical carbon fiber needled felt.
4. And pouring epoxy resin into the mould of the cylindrical carbon fiber needled felt with the size and shape, curing for 2 hours at normal temperature, and taking out to form the cylindrical carbon fiber reinforced epoxy resin composite material.
Example 8: a preparation method of a conical carbon fiber needled felt comprises the following steps:
1. firstly, carding and pre-needling reinforcing polyacrylonitrile short fiber with the length of 9cm to form 600g/m2Needle punching a felt web.
2. 600g/m2And (3) putting the needled felt web into a needling machine of a needling mould with the width of 0.6m and the diameter phi of the conical bottom of 300mm for needling, and forming the conical needled felt with the inner diameter phi of 300mm and the thickness of 8cm after continuously circulating web needling.
3. And (3) putting the conical needled felt into a carbonization furnace, and carbonizing at 1800 ℃ to form the conical carbon fiber needled felt.
4. Extruding the molten polypropylene resin into a mould of the conical carbon fiber needled felt with the size and the shape, fully mixing, keeping the mixture in the mould for 3 hours, and taking out the mixture to form the conical carbon fiber needled felt.
The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.
Claims (4)
1. A preparation method of a carbon fiber reinforced phenolic resin gear is characterized by comprising the following steps: the method comprises the following steps:
firstly, carding and needling the viscose staple fiber to form a needled felt;
secondly, carbonizing at the high temperature of 400-900 ℃ to form a carbon fiber needled felt;
thirdly, placing the carbon fiber needled felt into a gear mold, pouring the phenolic resin system into the mold for mold pressing, curing at the temperature of 240-350 ℃, and taking out after 0.5-4 hours of curing time to form the carbon fiber reinforced phenolic resin gear;
wherein the second step is specifically as follows:
1. carding viscose staple fibers and pre-needling the viscose staple fibers to form a needled felt web;
2. putting the needle felt cotton net into a needle machine of a needle punching mold for needle punching to form needle felts with different shapes;
3. carbonizing the needled felt at the high temperature of 400-900 ℃ to form a carbon fiber needled felt;
step one, the length of the viscose staple fiber is 3-10cm, and the needling density of the needled felt prepared from the viscose staple fiber is 50-200 needles/cm2The surface density of the needled felt is 400-5000 g/m2。
2. The method for producing a carbon fiber-reinforced phenolic resin gear according to claim 1, characterized in that: the weight percentage of the fiber is 30-60%, and the weight percentage of the phenolic resin system is 40-70%.
3. The method for producing a carbon fiber-reinforced phenolic resin gear according to claim 2, characterized in that: the carbon phenolic resin system comprises one or more of montmorillonite, nano carbon powder, carbon nano tubes, graphite, molybdenum disulfide, silicon dioxide and titanium dioxide filler, and the weight percentage of the filler is 0-30%.
4. The method for producing a carbon fiber-reinforced phenolic resin gear according to claim 3, characterized in that: the prepared carbon fiber reinforced phenolic resin gear is a cylindrical straight gear, a bevel gear, a herringbone gear or a face gear.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710389258.9A CN107245217B (en) | 2017-05-27 | 2017-05-27 | Preparation method of carbon fiber reinforced phenolic resin gear |
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| CN201710389258.9A CN107245217B (en) | 2017-05-27 | 2017-05-27 | Preparation method of carbon fiber reinforced phenolic resin gear |
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| CN107245217B true CN107245217B (en) | 2021-05-11 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58170963A (en) * | 1982-03-31 | 1983-10-07 | Sumitomo Electric Ind Ltd | Gear made of fiber reinforcing plastics |
| DE2454221C2 (en) * | 1974-11-15 | 1985-03-21 | Bayer Ag, 5090 Leverkusen | New reinforced plastics and methods of making them |
| CN1350023A (en) * | 2001-11-05 | 2002-05-22 | 张传国 | Thermosetting composite carbon fiber material and its prepn and use |
| CN1730764A (en) * | 2005-08-02 | 2006-02-08 | 中材科技股份有限公司 | Method for preparing continuous fiber reinforced thermoplastic plastic felt premix using needle punching |
| CN103668779A (en) * | 2013-12-23 | 2014-03-26 | 苏州中宝复合材料有限公司 | Silicon carbide fiber needle felt and manufacturing method thereof |
| CN104387719A (en) * | 2014-10-29 | 2015-03-04 | 陈精明 | Fiber-reinforced phenolic resin-based composite material and preparation method thereof |
| CN104710723A (en) * | 2013-12-11 | 2015-06-17 | 宁波博利隆复合材料科技有限公司 | Carbon fiber enhanced polyformaldehyde composite material and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS548694B1 (en) * | 1977-10-28 | 1979-04-18 |
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2017
- 2017-05-27 CN CN201710389258.9A patent/CN107245217B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2454221C2 (en) * | 1974-11-15 | 1985-03-21 | Bayer Ag, 5090 Leverkusen | New reinforced plastics and methods of making them |
| JPS58170963A (en) * | 1982-03-31 | 1983-10-07 | Sumitomo Electric Ind Ltd | Gear made of fiber reinforcing plastics |
| CN1350023A (en) * | 2001-11-05 | 2002-05-22 | 张传国 | Thermosetting composite carbon fiber material and its prepn and use |
| CN1730764A (en) * | 2005-08-02 | 2006-02-08 | 中材科技股份有限公司 | Method for preparing continuous fiber reinforced thermoplastic plastic felt premix using needle punching |
| CN104710723A (en) * | 2013-12-11 | 2015-06-17 | 宁波博利隆复合材料科技有限公司 | Carbon fiber enhanced polyformaldehyde composite material and preparation method thereof |
| CN103668779A (en) * | 2013-12-23 | 2014-03-26 | 苏州中宝复合材料有限公司 | Silicon carbide fiber needle felt and manufacturing method thereof |
| CN104387719A (en) * | 2014-10-29 | 2015-03-04 | 陈精明 | Fiber-reinforced phenolic resin-based composite material and preparation method thereof |
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Application publication date: 20171013 Assignee: NANJING HIGH-SPEED & ACCURATE GEAR GROUP Co.,Ltd. Assignor: Nanjing University of Aeronautics and Astronautics Contract record no.: X2023980033795 Denomination of invention: Preparation method of carbon fiber reinforced phenolic resin gear Granted publication date: 20210511 License type: Exclusive License Record date: 20230317 |