CN111621149A - Nylon material for pin type composite insulator cap-shaped connector for power grid transmission and distribution line and forming method - Google Patents
Nylon material for pin type composite insulator cap-shaped connector for power grid transmission and distribution line and forming method Download PDFInfo
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- CN111621149A CN111621149A CN202010491040.6A CN202010491040A CN111621149A CN 111621149 A CN111621149 A CN 111621149A CN 202010491040 A CN202010491040 A CN 202010491040A CN 111621149 A CN111621149 A CN 111621149A
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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
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention relates to a nylon material for a pin type composite insulator cap-shaped connector for a power grid transmission and distribution line and a forming method, wherein the nylon material comprises the following components in percentage by mass: 1. 62 to 66 percent of nylon resin, 28 to 33 percent of glass fiber, 3 to 6 percent of toughening agent, 0.2 to 0.5 percent of main antioxidant, 0.2 to 0.5 percent of auxiliary antioxidant, 0.2 to 0.5 percent of ultraviolet absorbent, 0.2 to 0.5 percent of light stabilizer and 1 to 3 percent of wear-resistant auxiliary agent; the viscosity of the nylon resin is 3.2 +/-0.01; the grafting rate of the toughening agent is 0.8-1.2%; the nylon resin adopts PA66 polyhexamethylene adipamide, PA6 polyamide 6 or the mixture of the two. After polymerization processing, the material performance of the invention is excellent, the mechanical performance, the electrical performance, the environmental aging resistance, the high and low environmental temperature resistance and the wear resistance of the material are excellent, and the invention accords with the safe use condition of the product.
Description
Technical Field
The invention belongs to a pin type composite insulator cap-shaped connector, and relates to a nylon material for the pin type composite insulator cap-shaped connector for a power grid transmission and distribution line and a forming method.
Background
The needle type composite insulator for the power transmission and distribution line of the power grid is used for insulating connection between a lead and a pole tower, and is composed of a lower steel leg hardware fitting connected with a cross arm of the pole tower, an upper steel cap connected with the lead, and an insulating core rod and vulcanized silicone rubber which are mechanically connected in a compression joint mode between the two hardware fittings. At present, in the industry, steel leg hardware is used for hot galvanizing anticorrosion treatment of forged steel process hardware, steel cap hardware is used for hot galvanizing anticorrosion treatment of cast steel process hardware, and the steel cap hardware has the defect that some defects can be improved in the use process; if the friction phenomenon exists between the conducting wire and the steel cap, the conducting wire is abraded; the air holes exist in a certain proportion in the casting process of the steel cap to influence the distribution of an electric field; the hardware fitting casting process is complex and has high energy consumption; product weight.
Disclosure of Invention
Technical problem to be solved
In order to avoid the defects of the prior art, the invention provides a nylon material for a pin type composite insulator cap-shaped connector for a power grid power transmission and distribution line and a forming method
Technical scheme
A nylon material for a pin type composite insulator cap-shaped connector for a power grid power transmission and distribution line is characterized by comprising the following components in percentage by mass: 62 to 66 percent of nylon resin, 28 to 33 percent of glass fiber, 3 to 6 percent of toughening agent, 0.2 to 0.5 percent of main antioxidant, 0.2 to 0.5 percent of auxiliary antioxidant, 0.2 to 0.5 percent of ultraviolet absorbent, 0.2 to 0.5 percent of light stabilizer and 1 to 3 percent of wear-resistant auxiliary agent; the viscosity of the nylon resin is 3.2 +/-0.01; the grafting rate of the toughening agent is 0.8-1.2%; the nylon resin adopts PA66 polyhexamethylene adipamide, PA6 polyamide 6 or the mixture of the two.
The PA66 and PA6 are mixed according to the mass ratio: 71% of PA66 and 29% of PA 6.
The toughening agent is selected from MAH grafted EPDM or POE grafted EPDM.
The main antioxidant is a hindered phenol antioxidant with high molecular weight.
And the auxiliary antioxidant is selected from phosphite ester substances.
The ultraviolet absorbent is selected from benzotriazole substances.
The light stabilizer is selected from hindered amines.
The wear-resistant auxiliary agent is selected from carbodiimide organic substances.
The method for preparing the pin insulator cap type connector of the power grid power transmission and distribution line by adopting the nylon material for the pin insulator cap type connector of the power grid power transmission and distribution line is characterized by comprising the following steps of:
step 1: adding white oil into nylon resin, stirring for 10min-12 min-one, mixing all component granules according to a ratio, adding into a high-speed mixer, and stirring for 15min-18min to obtain a premix;
step 2: adding the premix into a main feeding hopper of a double-screw extruder, and extruding and granulating; extrusion temperature: the feeding section is 220-240 ℃, the shearing plasticizing section is 240-260 ℃, and the head is 250-280 ℃;
and step 3: drying the granulated particles in a blast drying oven at 130 ℃ for 4-5 h;
and 4, step 4: the temperature of each stage of the charging barrel of the injection molding machine is set as follows: 290 ℃/275 ℃/270 ℃/265 ℃/230 ℃ from the head; the tolerance of the actual measured values of the temperatures in the respective zones is. + -. 5 ℃.
Placing the embedded part into a mold before injection molding;
and 5: and trimming the stub bars and burrs after the product is formed and demoulded.
Advantageous effects
The invention provides a nylon material for a pin type composite insulator cap-shaped connector for a power grid transmission and distribution line and a forming method, and designs a nylon sleeve material for an electrified railway AB. The main material is nylon resin selected from PA66 polyhexamethylene adipamide, PA6 polyamide 6 or the mixed nylon resin of the two; the modified composite material has excellent comprehensive mechanical property, good fluidity, excellent electrical property, and outstanding chemical corrosion resistance and high-temperature performance.
In order to meet the requirements of low temperature resistance of products and increase the low temperature impact resistance of the products, the toughening agent selects MAH grafted EPDM or POE grafted EPDM. The material has high and low temperature mechanical resistance after being polymerized with materials such as glass fiber and the like through proportion adjustment, and meets the product requirements.
Considering that the mechanical strength requirement of the product is higher, 28% -33% of glass fiber is added in the material design to ensure that the product meets the mechanical load requirement.
The main antioxidant comprehensively considering the processing and using environment of the product selects the asymmetric hindered phenol antioxidant with high molecular weight, the adjacent position of the hydroxyl group of the traditional hindered phenol antioxidant has two tert-butyl molecules, the space bit group is large, the reaction activity is low, and the plastic product is easy to color. One adjacent position of the asymmetric hindered phenol antioxidant is a group with small molecular weight, so that the steric hindrance effect of hydroxyl is weakened to a certain extent, the reduction of the steric hindrance effect is realized, and the nitro substitution on the meta position of the phenolic hydroxyl is easy to realize, so that the formed stable m-nitrophenol compound is a white solid, and overcomes the defect that the symmetric hindered phenol is subjected to para-nitration oxidation to generate a coloring product. The antioxidant effect is improved.
The auxiliary antioxidant is selected from phosphite ester substances, and the main function of the auxiliary antioxidant is to decompose hydroperoxide. The generation and accumulation of hydroperoxide are the most critical steps for the explanation of organic polymer materials, and after a certain concentration of hydroperoxide is generated, the free radical oxidation reaction is rapidly promoted, so that the phosphite antioxidant is very important for inhibiting aging. Meanwhile, the phosphite antioxidant has good color protection capability and can improve the processing temperature of the polymer. Has synergistic effect with the macromolecular asymmetric hindered phenol antioxidant.
The ultraviolet absorbent is selected from benzotriazole substances, which have higher light absorption index within 300-385mm and are close to the requirements of ideal absorbents, the action mechanism of the ultraviolet absorbent is to convert absorbed light energy into heat energy, and the ultraviolet absorbent is also based on a tautomer, before the light is absorbed, the ultraviolet absorbent exists in the form of a phenol compound, because the electron density on an oxygen atom is greater than that on a nitrogen atom of a triazole ring, the ultraviolet absorbent is made to be more basic, the electron density is mainly transferred from the oxygen atom to the nitrogen atom of the triazole ring through the absorption of the light, so that the phenol is more acidic, the nitrogen atom is more basic, and protons are rapidly transferred to the nitrogen atom to form the tautomer. This tautomer is unstable. The method can safely convert redundant energy into heat energy and return the heat energy to a more stable ground state, and the whole interconversion process has extremely high efficiency and can be repeated almost infinitely.
The light stabilizer is a novel high-efficiency light stabilizer following a light shielding agent, an ultraviolet absorber and a quenching agent, has the effect of 2-4 times that of the traditional light stabilizer, and has good synergistic effect with the ultraviolet absorber and an antioxidant. Such stabilizers do not color the resin. The coating is mainly applied to the application field with higher weather resistance and has excellent comprehensive performance. The functionalized hindered amine is a group which is bonded in a hindered amine light stabilizer and has the functions of ultraviolet absorption, thermal oxidation resistance, peroxide decomposition and the like. The low-alkalization hindered amine solves the problem that the traditional hindered amine has poor synergistic stabilizing effect with halogen-containing resin and acidic resin. The hindered amine light stabilizer is used together with an ultraviolet absorber, the ultraviolet absorber can absorb ultraviolet light with a large range and long time, but the light stabilizing efficiency of the ultraviolet absorber is not as good as that of the hindered amine light stabilizer, so that the hindered amine light stabilizer and the ultraviolet absorber are used together and show a synergistic effect.
Compared with the prior art, the invention has the advantages and effects that:
after polymerization processing, the material performance of the invention is excellent, the mechanical performance, the electrical performance, the environmental aging resistance, the high and low environmental temperature resistance and the wear resistance of the material are excellent, the invention accords with the safe use condition of the product, and the indexes of the material are as follows:
Detailed Description
The invention will now be further described with reference to the examples:
example 1:
step 1: 71% nylon resin PA66 was mixed with 29% nylon resin PA 6. Adding white oil, stirring for 10-12 min, mixing all the component granules according to a ratio, adding into a high-speed mixer, and stirring for 15-18 min to obtain a premix; the components are (62-66% of mixed nylon resin, 3-6% of MAH toughening agent, 0.2-0.5% of main antioxidant, 0.2-0.5% of auxiliary antioxidant, 0.2-0.5% of ultraviolet absorbent, 0.2-0.5% of light stabilizer and 1-3% of wear-resistant auxiliary agent)
Step 2: adding the premix into a main feeding hopper of a double-screw extruder, adding glass fiber into a co-extrusion auxiliary hopper, wherein the adding amount accounts for 28-33% of the total mass of the formula, and synchronously extruding and granulating; extrusion temperature: the feeding section is 220-240 ℃, the shearing plasticizing section is 240-260 ℃, and the head is 250-280 ℃;
and step 3: drying the granulated particles in a blast drying oven at 130 ℃ for 4-5 h;
and 4, step 4: the temperature of each stage of the charging barrel of the injection molding machine is set as follows: 290 ℃/275 ℃/270 ℃/265 ℃/230 ℃ from the head; the tolerance of the actual measured values of the temperatures in the respective zones is. + -. 5 ℃.
Placing the embedded part into a mold before injection molding;
and 5: and trimming the stub bars and burrs after the product is formed and demoulded.
According to the implementation method, the test result can reach the material index parameter range described above.
Example 2:
step 1: 71% nylon resin PA66 was mixed with 29% nylon resin PA 6. Adding white oil, stirring for 10-12 min, mixing all the component granules according to a ratio, adding into a high-speed mixer, and stirring for 15-18 min to obtain a premix; the components are (62-66% of mixed nylon resin, 3-6% of MAH toughening agent, 0.2-0.5% of main antioxidant, 0.2-0.5% of auxiliary antioxidant, 0.2-0.5% of ultraviolet absorbent, 0.2-0.5% of light stabilizer and 1-3% of wear-resistant auxiliary agent)
Step 2: adding the premix into a main feeding hopper of a double-screw extruder, adding glass fiber into a co-extrusion auxiliary hopper, wherein the adding amount accounts for 28-33% of the total mass of the formula, and synchronously extruding and granulating; extrusion temperature: the feeding section is 220-240 ℃, the shearing plasticizing section is 240-260 ℃, and the head is 250-280 ℃;
and step 3: drying the granulated particles in a blast drying oven at 130 ℃ for 4-5 h;
and 4, step 4: the temperature of each stage of the charging barrel of the injection molding machine is set as follows: 290 ℃/275 ℃/270 ℃/265 ℃/230 ℃ from the head; the tolerance of the actual measured values of the temperatures in the respective zones is. + -. 5 ℃.
Placing the embedded part into a mold before injection molding;
and 5: and trimming the stub bars and burrs after the product is formed and demoulded.
According to the implementation method, the test result can reach the material index parameter range described above.
Example 3:
step 1: nylon resin PA66 and toughening agent MAH. Adding white oil, stirring for 10-12 min, mixing all the component granules according to a ratio, adding into a high-speed mixer, and stirring for 15-18 min to obtain a premix; the components are (PA66 nylon resin 62-66%, MAH flexibilizer 3-6%, main antioxidant 0.2-0.5%, auxiliary antioxidant 0.2-0.5%, ultraviolet absorbent 0.2-0.5%, light stabilizer 0.2-0.5%, wear-resistant auxiliary agent 1-3%)
Step 2: adding the premix into a main feeding hopper of a double-screw extruder, adding glass fiber into a co-extrusion auxiliary hopper, wherein the adding amount accounts for 28-33% of the total mass of the formula, and synchronously extruding and granulating; extrusion temperature: the feeding section is 220-240 ℃, the shearing plasticizing section is 240-260 ℃, and the head is 250-280 ℃;
and step 3: drying the granulated particles in a blast drying oven at 130 ℃ for 4-5 h;
and 4, step 4: the temperature of each stage of the charging barrel of the injection molding machine is set as follows: 290 ℃/275 ℃/270 ℃/265 ℃/230 ℃ from the head; the tolerance of the actual measured values of the temperatures in the respective zones is. + -. 5 ℃.
Placing the embedded part into a mold before injection molding;
and 5: and trimming the stub bars and burrs after the product is formed and demoulded.
According to the implementation method, the test result can reach the material index parameter range described above.
Example 4:
step 1: nylon resin PA66 and toughening agent POE. Adding white oil, stirring for 10-12 min, mixing all the component granules according to a ratio, adding into a high-speed mixer, and stirring for 15-18 min to obtain a premix; the components are (PA66 nylon resin 62-66%, POE flexibilizer 3-6%, main antioxidant 0.2-0.5%, auxiliary antioxidant 0.2-0.5%, ultraviolet absorbent 0.2-0.5%, light stabilizer 0.2-0.5%, wear-resistant auxiliary agent 1-3%)
Step 2: adding the premix into a main feeding hopper of a double-screw extruder, adding glass fiber into a co-extrusion auxiliary hopper, wherein the adding amount accounts for 28-33% of the total mass of the formula, and synchronously extruding and granulating; extrusion temperature: the feeding section is 220-240 ℃, the shearing plasticizing section is 240-260 ℃, and the head is 250-280 ℃;
and step 3: drying the granulated particles in a blast drying oven at 130 ℃ for 4-5 h;
and 4, step 4: the temperature of each stage of the charging barrel of the injection molding machine is set as follows: 290 ℃/275 ℃/270 ℃/265 ℃/230 ℃ from the head; the tolerance of the actual measured values of the temperatures in the respective zones is. + -. 5 ℃.
Placing the embedded part into a mold before injection molding;
and 5: and trimming the stub bars and burrs after the product is formed and demoulded.
According to the implementation method, the test result can reach the material index parameter range described above.
Claims (9)
1. A nylon material for a pin type composite insulator cap-shaped connector for a power grid power transmission and distribution line is characterized by comprising the following components in percentage by mass: 62 to 66 percent of nylon resin, 28 to 33 percent of glass fiber, 3 to 6 percent of toughening agent, 0.2 to 0.5 percent of main antioxidant, 0.2 to 0.5 percent of auxiliary antioxidant, 0.2 to 0.5 percent of ultraviolet absorbent, 0.2 to 0.5 percent of light stabilizer and 1 to 3 percent of wear-resistant auxiliary agent; the viscosity of the nylon resin is 3.2 +/-0.01; the grafting rate of the toughening agent is 0.8-1.2%; the nylon resin adopts PA66 polyhexamethylene adipamide, PA6 polyamide 6 or the mixture of the two.
2. The nylon material for the pin insulator cap-type connector of the power grid transmission and distribution line according to claim 1, wherein the nylon material comprises: the PA66 and PA6 are mixed according to the mass ratio: 71% of PA66 and 29% of PA 6.
3. The nylon material for the pin insulator cap-type connector of the power grid transmission and distribution line according to claim 1, wherein the nylon material comprises: the toughening agent is selected from MAH grafted EPDM or POE grafted EPDM.
4. The nylon material for the pin insulator cap-type connector of the power grid transmission and distribution line according to claim 1, wherein the nylon material comprises: the main antioxidant is a hindered phenol antioxidant with high molecular weight.
5. The nylon material for the pin insulator cap-type connector of the power grid transmission and distribution line according to claim 1, wherein the nylon material comprises: and the auxiliary antioxidant is selected from phosphite ester substances.
6. The nylon material for the pin insulator cap-type connector of the power grid transmission and distribution line according to claim 1, wherein the nylon material comprises: the ultraviolet absorbent is selected from benzotriazole substances.
7. The nylon material for the pin insulator cap-type connector of the power grid transmission and distribution line according to claim 1, wherein the nylon material comprises: the light stabilizer is selected from hindered amines.
8. The nylon material for the pin insulator cap-type connector of the power grid transmission and distribution line according to claim 1, wherein the nylon material comprises: the wear-resistant auxiliary agent is selected from carbodiimide organic substances.
9. A method for preparing a cap-type connector of a pin insulator of a power transmission and distribution line by using the nylon material for the cap-type connector of the pin insulator of the power transmission and distribution line according to claim 1 or 2, which is characterized by comprising the following steps:
step 1: adding white oil into nylon resin, stirring for 10min-12 min-one, mixing all component granules according to a ratio, adding into a high-speed mixer, and stirring for 15min-18min to obtain a premix;
step 2: adding the premix into a main feeding hopper of a double-screw extruder, and extruding and granulating; extrusion temperature: the feeding section is 220-240 ℃, the shearing plasticizing section is 240-260 ℃, and the head is 250-280 ℃;
and step 3: drying the granulated particles in a blast drying oven at 130 ℃ for 4-5 h;
and 4, step 4: the temperature of each stage of the charging barrel of the injection molding machine is set as follows: 290 ℃/275 ℃/270 ℃/265 ℃/230 ℃ from the head; the tolerance of the actual measured values of the temperatures in the respective zones is. + -. 5 ℃.
Placing the embedded part into a mold before injection molding;
and 5: and trimming the stub bars and burrs after the product is formed and demoulded.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010491040.6A CN111621149A (en) | 2020-06-02 | 2020-06-02 | Nylon material for pin type composite insulator cap-shaped connector for power grid transmission and distribution line and forming method |
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| CN202010491040.6A CN111621149A (en) | 2020-06-02 | 2020-06-02 | Nylon material for pin type composite insulator cap-shaped connector for power grid transmission and distribution line and forming method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112562937A (en) * | 2020-11-30 | 2021-03-26 | 西安唯实输配电技术有限公司 | Line column type composite insulator and preparation method thereof |
| CN112552678A (en) * | 2020-11-23 | 2021-03-26 | 新疆特变电工自控设备有限公司 | Insulating part for 12KV bus sleeve and preparation method and application thereof |
| CN114628082A (en) * | 2022-03-23 | 2022-06-14 | 广东南海启明光大科技有限公司 | Environment-aging-resistant conductive silver paste and preparation method thereof |
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| CN103865254A (en) * | 2014-04-08 | 2014-06-18 | 南京聚隆科技股份有限公司 | Nylon composite material for electric power fitting and preparation method of nylon composite material |
| CN108485253A (en) * | 2018-05-08 | 2018-09-04 | 厦门倍斯通塑胶科技有限公司 | A kind of nylon composite materials and preparation method thereof |
| CN109054373A (en) * | 2018-06-28 | 2018-12-21 | 西安永兴科技发展有限公司 | A kind of contact nets in electrified railways are fixed to hang device for carrying a tripot nylon material and preparation method thereof |
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| CN103865254A (en) * | 2014-04-08 | 2014-06-18 | 南京聚隆科技股份有限公司 | Nylon composite material for electric power fitting and preparation method of nylon composite material |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112552678A (en) * | 2020-11-23 | 2021-03-26 | 新疆特变电工自控设备有限公司 | Insulating part for 12KV bus sleeve and preparation method and application thereof |
| CN112562937A (en) * | 2020-11-30 | 2021-03-26 | 西安唯实输配电技术有限公司 | Line column type composite insulator and preparation method thereof |
| CN114628082A (en) * | 2022-03-23 | 2022-06-14 | 广东南海启明光大科技有限公司 | Environment-aging-resistant conductive silver paste and preparation method thereof |
| CN114628082B (en) * | 2022-03-23 | 2023-09-05 | 广东南海启明光大科技有限公司 | Environment-aging-resistant conductive silver paste and preparation method thereof |
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