CN115433454A - High-strength injection molding nylon material and preparation method thereof - Google Patents
High-strength injection molding nylon material and preparation method thereof Download PDFInfo
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- CN115433454A CN115433454A CN202210895893.5A CN202210895893A CN115433454A CN 115433454 A CN115433454 A CN 115433454A CN 202210895893 A CN202210895893 A CN 202210895893A CN 115433454 A CN115433454 A CN 115433454A
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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
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
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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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/221—Oxides; Hydroxides of metals of rare earth metal
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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
- C08K2003/3009—Sulfides
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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
Abstract
The invention discloses a high-strength injection molding nylon material and a preparation method thereof, wherein the high-strength injection molding nylon material is prepared by mixing 100 parts by mass of T-MC monomer nylon, 1 to 50 parts by mass of carbon fiber and 1 to 10 parts by mass of polytetrafluoroethylene. Wherein the T-MC monomer nylon is prepared by mixing 100 parts by mass of caprolactam, 0.005 to 12 parts by mass of a catalyst, 0.005 to 12 parts by mass of an activator, 0.01 to 30 parts by mass of a toughening agent, 0.005 to 12 parts by mass of an abrasion-resistant agent and 0.005 to 12 parts by mass of a rare earth compound. The high-strength injection molding nylon material prepared by the invention has the tensile strength of more than or equal to 140MPa and the bending strength of more than or equal to 180MPa, is greatly improved compared with the common nylon after strengthening and toughening, and effectively expands the application range of the nylon material. The heat distortion temperature of the nylon material is above 180 ℃, and the heat distortion temperature of the common nylon is about 120 ℃, so that the application range of the nylon material is further expanded, and the nylon material can still run smoothly in a high-temperature environment.
Description
Technical Field
The invention relates to the field of nylon materials, in particular to a high-strength injection molding nylon material and a preparation method thereof.
Background
The tensile strength of common nylon on the market is 60-80Mp, the bending strength is 100-120MPa, if the common nylon is reinforced and toughened, the tensile strength can reach 125-135 Mpa, and the bending strength can reach 160MPa, but in some special occasions, such as cantilever stress, radial stress, high-pressure sliding and other occasions, the tensile strength and the bending strength of the nylon material still can not meet the requirements, and in addition, the heat deformation temperature of the common nylon is about 120 ℃, the use requirements of some high-temperature occasions can not be met, so that the nylon material with more excellent performance and obviously improved tensile strength, bending strength and heat deformation temperature needs to be further searched.
Disclosure of Invention
The invention mainly aims to provide a high-strength injection molding nylon material and a preparation method thereof, which can effectively solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the technical scheme that: a high-strength injection molding nylon material is prepared by mixing T-MC monomer nylon, carbon fibers and polytetrafluoroethylene, wherein the component proportions are that the T-MC monomer nylon is 100 parts by mass, the carbon fibers are 1 to 50 parts by mass, and the polytetrafluoroethylene is 1 to 10 parts by mass. Wherein the T-MC monomer nylon is prepared by mixing caprolactam, a catalyst, an activating agent, a toughening agent, an anti-wear agent and a rare earth compound.
Preferably, the components in the T-MC monomer nylon comprise 100 parts by mass of caprolactam, 0.005 to 12 parts by mass of catalyst, 0.005 to 12 parts by mass of activating agent, 0.01 to 30 parts by mass of toughening agent, 0.005 to 12 parts by mass of wear-resisting agent and 0.005 to 12 parts by mass of rare earth compound.
Preferably, the catalyst is any one or combination of the following: sodium hydroxide, sodium methoxide, sodium ethoxide.
Preferably, the activator is any one or combination of the following: diphenylmethane diisocyanate, ethylene diamine phosphate, propylene diamine phosphate, xylene, sodium fluosilicate, ammonium sulfate, ammonium chloride, ferrous sulfate, ammonium hydroxide, diisocyanate, hexamethylene diisocyanate, diphenylmethane and dicyclohexylmethane.
Preferably, the toughening agent is any one or a combination of the following: toluene diisocyanate, ethylene octene copolymer, and butyrolactam.
Preferably, the anti-wear agent is any one or a combination of the following: molybdenum disulfide, graphite, liquid paraffin and polytetrafluoroethylene.
Preferably, the rare earth compound is any one or a combination of the following: isooctanoic acid rare earth, naphthenic acid rare earth and rare earth oxide.
A preparation method of a high-strength injection molding nylon material comprises the following steps,
preparing T-MC monomer nylon according to the mixture ratio of claim 2, and comprising the following substeps: s1, adding caprolactam into a melting furnace, heating and melting, and transferring the caprolactam into a reaction kettle; s2, heating the reaction kettle to 140-160 ℃, and vacuumizing the reaction kettle to keep the boiling state of the molten caprolactam for 2-4 minutes; s3, while keeping the boiling of the molten caprolactam, adding a catalyst, a toughening agent, a wear-resisting agent and a rare earth compound into the reaction kettle, gradually reducing the temperature by 8 to 12 ℃, and continuously keeping the mixture in the kettle in a boiling state for 8 to 12 minutes; s4, stopping vacuumizing the reaction kettle, adding an activating agent into the reaction kettle, and uniformly stirring; s5, casting the mixture in the reaction kettle into a preheated mold; s6, putting the poured mould into an oven again, and carrying out constant-temperature polymerization reaction at 160-180 ℃; s7, opening the oven, taking out the mold, cooling, demolding and crushing the T-MC monomer nylon;
preparing a high-strength injection molding nylon material according to the mixture ratio of claim 1, and comprising the following steps of: and (4) adding carbon fiber and polytetrafluoroethylene into the T-MC monomer nylon chips obtained in the step one, uniformly mixing, and then mixing and granulating by using an extruder.
Compared with the prior art, the invention has the following beneficial effects:
1. the high-strength injection molding nylon material prepared by the invention has the tensile strength of more than or equal to 140MPa and the bending strength of more than or equal to 180MPa, is greatly improved compared with the common nylon after strengthening and toughening, and effectively expands the application range of the nylon material.
2. The high-strength injection molding nylon material prepared by the invention has the heat distortion temperature of more than 180 ℃, and the heat distortion temperature of common nylon is about 120 ℃, so that the application range of the nylon material can be greatly expanded by obviously improving the heat distortion temperature, and the nylon material can still run smoothly in a high-temperature environment.
3. The high-strength injection molding nylon material prepared by the invention has stable performance and wide application range, and can be used as a plastic-substituted steel part for lightweight project application in the automobile industry. In addition, the nylon material is also a substitute material for sliding bearings such as babbitt metal, copper-based and aluminum-based alloys, wear-resistant cast iron and the like.
4. In the invention, the components forming the nylon material can obviously improve the performance of the nylon on the premise of reducing the cost, thereby realizing the maximization of the benefit.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Example 1
A high-strength injection molding nylon material is prepared by mixing T-MC monomer nylon, carbon fiber and polytetrafluoroethylene in a ratio of 100 parts by mass of T-MC monomer nylon, 1 part by mass of carbon fiber and 1 part by mass of polytetrafluoroethylene. Wherein the T-MC monomer nylon is prepared by mixing 100 parts by mass of caprolactam, 0.005 part by mass of catalyst sodium methoxide, 0.005 part by mass of activator ethylene diamine phosphate, 0.01 part by mass of toughener toluene diisocyanate, 0.005 part by mass of wear-resisting agent molybdenum disulfide and 0.005 part by mass of rare earth isooctanoate.
The preparation method of the high-strength injection molding nylon material comprises the following steps,
preparing T-MC monomer nylon according to the proportion, and comprises the following substeps: s1, adding caprolactam into a melting furnace, heating and melting, and transferring to a reaction kettle; s2, heating the reaction kettle to 140 ℃, and simultaneously vacuumizing the reaction kettle to keep the boiling state of the molten caprolactam for 2 minutes; s3, while keeping the boiling of the molten caprolactam, adding a catalyst, a toughening agent, an abrasion-resistant agent and a rare earth compound into the reaction kettle, gradually reducing the temperature by 12 ℃, and continuously keeping the mixture in the kettle in a boiling state for 8 minutes; s4, stopping vacuumizing the reaction kettle, adding an activating agent into the reaction kettle, and uniformly stirring; s5, casting the mixture in the reaction kettle into a preheated mold; s6, putting the poured mould into the oven again, and carrying out constant-temperature polymerization reaction at 180 ℃; s7, opening the oven, taking out the mold, cooling, demolding and crushing the T-MC monomer nylon;
step two, preparing the high-strength injection molding nylon material, according to the mixture ratio, comprising the following steps: and (3) adding carbon fiber and polytetrafluoroethylene into the T-MC monomer nylon chips obtained in the step one, uniformly mixing, and then mixing and granulating by using an extruder.
The finally obtained material is tested, the tensile strength is 140Mpa, and the test standard of GB/T1040.5-2008 plastic tensile property is met; the bending strength is 180Mpa, and the test standard of the GB/T9341-2000 plastic bending property test method is met; the heat distortion temperature is 180 ℃, and the measurement standard of GB/T1634.1-2019 plastic load distortion temperature is met.
Example 2
The high-strength injection molding nylon material is prepared by mixing 100 parts by mass of T-MC monomer nylon, 25 parts by mass of carbon fiber and 5 parts by mass of polytetrafluoroethylene. The T-MC monomer nylon is prepared by mixing 100 parts by mass of caprolactam, 8 parts by mass of catalyst sodium methoxide, 6 parts by mass of activator ethylene diamine phosphate, 15 parts by mass of toughening agent toluene diisocyanate, 10 parts by mass of wear-resistant agent molybdenum disulfide and 9 parts by mass of isooctanoic acid rare earth.
The preparation method of the high-strength injection molding nylon material comprises the following steps:
preparing T-MC monomer nylon according to the proportion, and comprises the following substeps: s1, adding caprolactam into a melting furnace, heating and melting, and transferring to a reaction kettle; s2, heating the reaction kettle to 160 ℃, and vacuumizing the reaction kettle to keep the boiling state of the molten caprolactam for 4 minutes; s3, while keeping the boiling of the molten caprolactam, adding the catalyst, the toughening agent, the wear-resisting agent and the rare earth compound into the reaction kettle, gradually reducing the temperature by 8 ℃, and continuously keeping the mixture in the kettle in a boiling state for 12 minutes; s4, stopping vacuumizing the reaction kettle, adding an activating agent into the reaction kettle, and uniformly stirring; s5, casting the mixture in the reaction kettle into a preheated mold; s6, putting the poured mould into the oven again, and carrying out constant-temperature polymerization reaction at 160 ℃; s7, opening the oven, taking out the mold, cooling, demolding and crushing the T-MC monomer nylon;
step two, preparing the high-strength injection molding nylon material, according to the mixture ratio, comprising the following steps: and (4) adding carbon fiber and polytetrafluoroethylene into the T-MC monomer nylon chips obtained in the step one, uniformly mixing, and then mixing and granulating by using an extruder.
The finally obtained material is tested, the tensile strength is 150Mpa, and the measurement standard of GB/T1040.5-2008 plastic tensile property is met; the bending strength is 190Mpa, and the test standard of the GB/T9341-2000 plastic bending performance test method is met; the heat distortion temperature is 185 ℃, and the measurement standard of GB/T1634.1-2019 plastic load distortion temperature is met.
Example 3
A high-strength injection molding nylon material is prepared by mixing T-MC monomer nylon, carbon fibers and polytetrafluoroethylene in a ratio of 100 parts by mass of T-MC monomer nylon, 50 parts by mass of carbon fibers and 10 parts by mass of polytetrafluoroethylene. Wherein the T-MC monomer nylon is formed by mixing 100 parts by mass of caprolactam, 12 parts by mass of catalyst sodium ethoxide, 12 parts by mass of activator dicyclohexylmethane, 30 parts by mass of flexibilizer butyrolactam, 12 parts by mass of wear-resistant agent polytetrafluoroethylene and 12 parts by mass of rare earth oxide.
The preparation method of the high-strength injection molding nylon material comprises the following steps,
step one, preparing T-MC monomer nylon, which comprises the following substeps according to the mixture ratio: s1, adding caprolactam into a melting furnace, heating and melting, and transferring the caprolactam into a reaction kettle; s2, heating the reaction kettle to 150 ℃, and vacuumizing the reaction kettle to keep the boiling state of the molten caprolactam for 3 minutes; s3, while keeping the boiling of the molten caprolactam, adding the catalyst, the toughening agent, the wear-resisting agent and the rare earth compound into the reaction kettle, gradually reducing the temperature by 10 ℃, and continuously keeping the mixture in the kettle in a boiling state for 10 minutes; s4, stopping vacuumizing the reaction kettle, adding an activating agent into the reaction kettle, and uniformly stirring; s5, casting the mixture in the reaction kettle into a preheated mold; s6, putting the poured mould into the oven again, and carrying out constant-temperature polymerization reaction at 170 ℃; s7, opening the oven, taking out the mold, cooling, demolding and crushing the T-MC monomer nylon;
step two, preparing the high-strength injection molding nylon material, according to the mixture ratio, comprising the following steps: and (3) adding carbon fiber and polytetrafluoroethylene into the T-MC monomer nylon chips obtained in the step one, uniformly mixing, and then mixing and granulating by using an extruder.
The finally obtained material is tested, the tensile strength reaches 160Mpa, and the measurement standard of the tensile property of GB/T1040.5-2008 plastic is met and exceeded; the bending strength reaches 200Mpa, and meets and exceeds the determination standard of a GB/T9341-2000 plastic bending performance test method; the heat distortion temperature is 190 ℃, and meets and exceeds the measurement standard of GB/T1634.1-2019 plastic load distortion temperature.
In addition, in the material obtained in the embodiment 3, the notch impact is 10 KJ/square meter, and the test standard of GB/T1043.1-2008 plastic simple supported beam impact performance is met; the friction coefficient is 0.1, and meets the test standard of GB 3960-83 plastic sliding friction wear test.
Note: common performance detection standard of nylon
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The high-strength injection molding nylon material is characterized in that: the material is prepared by mixing T-MC monomer nylon, carbon fiber and polytetrafluoroethylene, wherein the component proportions are that the T-MC monomer nylon is 100 parts by mass, the carbon fiber is 1 to 50 parts by mass, and the polytetrafluoroethylene is 1 to 10 parts by mass; the T-MC monomer nylon is prepared by mixing caprolactam, a catalyst, an activating agent, a toughening agent, an abrasion-resistant agent and a rare earth compound.
2. The high-strength injection-molded nylon material as claimed in claim 1, wherein: the components in the T-MC monomer nylon comprise 100 parts by mass of caprolactam, 0.005 to 12 parts by mass of catalyst, 0.005 to 12 parts by mass of activating agent, 0.01 to 30 parts by mass of toughening agent, 0.005 to 12 parts by mass of wear-resisting agent and 0.005 to 12 parts by mass of rare earth compound.
3. The high-strength injection-molded nylon material as claimed in claim 2, wherein the catalyst is any one or combination of the following: sodium hydroxide, sodium methoxide, sodium ethoxide.
4. The high-strength injection-molded nylon material as claimed in claim 2, wherein the activator is any one or a combination of the following: diphenylmethane diisocyanate, ethylene diamine phosphate, propylene diamine phosphate, xylene, sodium fluosilicate, ammonium sulfate, ammonium chloride, ferrous sulfate, ammonium hydroxide, diisocyanate, hexamethylene diisocyanate, diphenylmethane and dicyclohexylmethane.
5. The high-strength injection-molded nylon material as claimed in claim 2, wherein: the toughening agent is any one or the combination of the following components: toluene diisocyanate, ethylene octene copolymer, and butyrolactam.
6. The high-strength injection-molded nylon material as claimed in claim 2, wherein the anti-wear agent is any one or a combination of the following: molybdenum disulfide, graphite, liquid paraffin and polytetrafluoroethylene.
7. The high-strength injection-molded nylon material as claimed in claim 2, wherein: the rare earth compound is any one or combination of the following compounds: isooctanoic acid rare earth, naphthenic acid rare earth and rare earth oxide.
8. A preparation method of a high-strength injection molding nylon material is characterized by comprising the following steps,
the preparation method of the T-MC monomer nylon according to the mixture ratio of claim 2 comprises the following substeps:
s1, adding caprolactam into a melting furnace, heating and melting, and transferring to a reaction kettle;
s2, heating the reaction kettle to 140 to 160 ℃, and vacuumizing the reaction kettle to keep the boiling state of the molten caprolactam for 2 to 4 minutes;
s3, while keeping the boiling of the molten caprolactam, adding a catalyst, a toughening agent, a wear-resisting agent and a rare earth compound into the reaction kettle, gradually reducing the temperature by 8 to 12 ℃, and continuously keeping the mixture in the kettle in a boiling state for 8 to 12 minutes;
s4, stopping vacuumizing the reaction kettle, adding an activating agent into the reaction kettle, and uniformly stirring;
s5, casting the mixture in the reaction kettle into a preheated mold;
s6, putting the poured mold into the oven again, and carrying out constant-temperature polymerization reaction at 160-180 ℃;
s7, opening the oven, taking out the mold, cooling, demolding and crushing the T-MC monomer nylon;
preparing a high-strength injection molding nylon material according to the mixture ratio of claim 1, and comprising the following steps of: and (2) adding carbon fiber and polytetrafluoroethylene into the T-MC monomer nylon chips obtained in the step one, uniformly mixing, and then mixing and granulating by using an extruder.
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| CN202210895893.5A CN115433454A (en) | 2022-07-28 | 2022-07-28 | High-strength injection molding nylon material and preparation method thereof |
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| CN202210895893.5A CN115433454A (en) | 2022-07-28 | 2022-07-28 | High-strength injection molding nylon material and preparation method thereof |
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| CN104004184A (en) * | 2014-05-22 | 2014-08-27 | 仲恺农业工程学院 | Halogen-free flame retardant MC (Monomer Casting) nylon composite material and preparation method thereof |
| CN106633831A (en) * | 2015-11-03 | 2017-05-10 | 株洲时代新材料科技股份有限公司 | Preparation method of cast nylon EPS (electrical power steering) worm gear |
| CN108203506A (en) * | 2018-02-01 | 2018-06-26 | 东华大学 | A kind of MC nylon reinforced with carbon fiber thermoplastic composite and preparation method thereof |
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- 2022-07-28 CN CN202210895893.5A patent/CN115433454A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103396663A (en) * | 2013-08-13 | 2013-11-20 | 株洲时代新材料科技股份有限公司 | Transverse limiting plate for automobile and preparation method thereof |
| CN104004184A (en) * | 2014-05-22 | 2014-08-27 | 仲恺农业工程学院 | Halogen-free flame retardant MC (Monomer Casting) nylon composite material and preparation method thereof |
| CN106633831A (en) * | 2015-11-03 | 2017-05-10 | 株洲时代新材料科技股份有限公司 | Preparation method of cast nylon EPS (electrical power steering) worm gear |
| CN108203506A (en) * | 2018-02-01 | 2018-06-26 | 东华大学 | A kind of MC nylon reinforced with carbon fiber thermoplastic composite and preparation method thereof |
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