CN102532635A - Ultra-smooth shielding material - Google Patents
Ultra-smooth shielding material Download PDFInfo
- Publication number
- CN102532635A CN102532635A CN2010105917521A CN201010591752A CN102532635A CN 102532635 A CN102532635 A CN 102532635A CN 2010105917521 A CN2010105917521 A CN 2010105917521A CN 201010591752 A CN201010591752 A CN 201010591752A CN 102532635 A CN102532635 A CN 102532635A
- Authority
- CN
- China
- Prior art keywords
- resin composition
- polyolefine resin
- polar
- mass parts
- ethylene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention provides a polyolefin resin composite and a preparation method thereof. The polyolefin resin composite comprises polar polyolefin, non-polar polyolefin, conductive carbon black and a crosslinking agent. According to the invention, the number of defects more than 100 mu m on the surface of the polyolefin resin composite is zero, the volume resistivity of the polyolefin resin composite is less the 100 omega.m, and the elongation of the polyolefin resin composite is more than 200%. The invention further provides a cable shielding material and a cable. By using the polyolefin resin composite, the process performance and surface smoothness of the shielding material are greatly improved, and the physical process performance of the material is maintained; and simultaneously, in the preparation method of the polyolefin resin composite, fine filtration, crosslinling agent mixing and homogenization are adopted, so that impurities in the shielding material are minimum, and the precrosslinking of the shielding material is the lowest, thereby meeting the requirement of an ultrahigh voltage cable shielding material.
Description
Technical field
The present invention relates to a kind of polyolefine resin composition, also relate to comprise this resin combination cable with shielding material and cable.
Background technology
The inside and outside shielding material of extra-high-tension cable generally adopts the polar polyolefin resin compounded to process.Polyolefin resin itself has more intense electrical insulating property, in the process of making shielding material, needs to add the conductivity that a large amount of graphitized carbon blacks improves material, makes the processing characteristics of shielding material reduce greatly.
On the other hand, generally use at present the cable of increasingly high grade, like the use of 110kV, 220kV cable or even the cable that requires of voltage levels more.
Present shielding material is filled in the polar polyolefin resin with a large amount of graphitized carbon blacks usually, and the conductivity of the conductivity raising matrix material of dependence graphitized carbon black self reaches the purpose of shielding.But because the graphitized carbon black loading level is big, the physical technology degradation of material is more serious, and the finished surface that makes has obvious defects.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art; A kind of polyolefine resin composition is provided; This polyolefine resin composition comprises polar polyolefin, non-polar polyolefinic, graphitized carbon black and linking agent; Wherein, the said polyolefine resin composition of per kilogram surface greater than the number of defects of 100 μ m be 0, volume specific resistance less than 100 Ω m, elongation at break greater than 200%.
Another object of the present invention is to provide a kind of preparation method of polyolefine resin composition; This method comprises: polar polyolefin, non-polar polyolefinic and graphitized carbon black is mixing under 140-170 ℃ temperature, extruding pelletization, impurity screening under 165-200 ℃ temperature; Mix with linking agent then.
Another object of the present invention is to provide a kind of cable to use shielding material, and this cable comprises polyolefine resin composition of the present invention with shielding material.
Another object of the present invention is to provide a kind of cable, and this cable comprises that cable of the present invention uses shielding material.
Polyolefine resin composition provided by the invention has been optimized composition of raw materials and production technique, under the prerequisite of the physical technology performance that does not reduce material, the use characteristics of shielding material and surface smoothness is improved greatly; Simultaneously; The preparation method of polyolefine resin composition of the present invention adopts the method for fine filtering and back mixed cross-linker and homogenizing; Make the impurity in the shielding material reach minimum, the precrosslink of shielding material reaches minimum, can meet the requirement of extra-high-tension cable shielding material.
Embodiment
Term as used herein " Vilaterm " is meant the homopolymer of ethene.
Polyolefine resin composition provided by the invention comprises polar polyolefin, non-polar polyolefinic, graphitized carbon black and linking agent.Wherein, The content of said polar polyolefin is the 40-70 mass parts, be preferably the 45-60 mass parts; The content of said non-polar polyolefinic is the 5-20 mass parts, be preferably the 10-15 mass parts; The content of said graphitized carbon black is the 30-50 mass parts, be preferably the 35-45 mass parts, and the content of said linking agent is the 0.5-5 mass parts, be preferably the 1-3 mass parts.
According to polyolefine resin composition provided by the invention, the density of said polar polyolefin is 0.88-0.96g/cm
3, be preferably 0.90-0.93g/cm
3, melting index be 0.5-10g/10min (190 ℃, 2.16kg), be preferably 2-7g/10min (190 ℃, 2.16kg).
Under preferable case, said polar polyolefin can be the multipolymer of ethene, and the copolymerization ratio of the multipolymer of ethene can be various ratios, and the content of vinyl monomer can be the 70-98% molar percentage in the preferred copolymer.
About above-mentioned polar polyolefin; Can select the various polar polyolefins that can satisfy above-mentioned condition, for example can be selected from vinyl-vinyl acetate copolymer (EVA), ethylene-propylene acetoacetic ester (EEA) multipolymer, ethylene-methyl acrylate copolymer (EMA) and the methyl acrylate-ethylene-ethyl acetate copolymer one or more.Said polar polyolefin can be through being purchased acquisition.
According to polyolefine resin composition provided by the invention, the density of said non-polar polyolefinic is 0.860-0.950g/cm
3, be preferably 0.870-0.930g/cm
3, melting index be 0.1-50g/10min (190 ℃, 2.16kg), be preferably 1-5g/10min (190 ℃, 2.16kg).
About above-mentioned non-polar polyolefinic; Can select the various non-polar polyolefinics that can satisfy above-mentioned condition, for example can be selected from Vilaterm, ethylene-propylene rubber(EPR), ethene and at least a 3-12 of the having ethylene copolymer individual, the preferably alhpa olefin copolymerization of 3-8 carbon atom one or more.Alhpa olefin can be propylene, 1-butylene, 1-hexene, 4 Methyl-1-pentenes, 1-octene.Wherein, preferably in this multipolymer the content of vinyl monomer can be the 80-98% molar percentage.
Under preferable case, non-polar polyolefinic of the present invention can be new LDPE (film grade) or linear low density polyethylene.The density of this new LDPE (film grade) or linear low density polyethylene is generally 0.860-0.950g/cm
3, be preferably 0.870-0.930g/cm
3, melting index be approximately 0.1-50g/10min (190 ℃, 2.16kg), preferred 1-5g/10min (190 ℃, 2.16kg), more preferably 1.5-2.5g/10min (190 ℃, 2.16kg).This new LDPE (film grade) or linear low density polyethylene can adopt the various products that are purchased, like Shanghai petrochemical industry (DJ210, DJ200A), raise sub-BASF petrochemical industry (2220H), import Iran's petrochemical industry (2102TX00) etc.
According to polyolefine resin composition provided by the invention, the resistivity of said graphitized carbon black＜10
3Ω m, be preferably 50-200 Ω m, median size＜50 μ m, be preferably 5-30 μ m, oil-absorption(number)>=1.25ml/g, be preferably 2.5-10ml/g.
According to polyolefine resin composition provided by the invention, said linking agent can adopt the normally used various linking agents of those skilled in the art, for example can be selected from the peroxide linking agent.The example of said peroxide linking agent includes but not limited to Di Cumyl Peroxide 99, dual-tert-butyl peroxy isopropyl base benzene, bis(2,2,5-dimethyl--2, at least a in the 5-bis(t-butylperoxy) hexane.Said linking agent can be through being purchased acquisition.
According to polyolefine resin composition provided by the invention, under preferable case, said polyolefine resin composition can also comprise auxiliary agent, and the content of auxiliary agent can be the 0.5-10 mass parts.
Above-mentioned auxiliary agent can adopt the conventional auxiliary agent that uses in this area; For example anti-agent, stopper, nucleator (can make polyolefinic crystal littler, thereby make its physicals uniformity), oxidation inhibitor, thermo-stabilizer, photostabilizer, UV absorption agent, lubricant, dispersion agent, processing aid, fire retardant and the static inhibitor etc. of burning.Said auxiliary agent can be through being purchased acquisition.
Wherein, oxidation inhibitor can comprise primary antioxidant and auxiliary antioxidant.Said primary antioxidant can be selected various oxidation inhibitor usually used in this field for use; Four [methyl-β-(3 for example; The 5-di-tert-butyl-hydroxy phenyl) propionic ester] pentaerythritol ester (antioxidant 1010), 4; 4 '-thiobis (6-tertiary butyl meta-cresol) (antioxidant 300), DBPC 2,6 ditertiary butyl p cresol (antioxidant 264), 2,2 '-at least a in methylene-bis-(4-methyl-6-tert butyl phenol) (antioxidant 2246).
Said auxiliary antioxidant can be selected auxiliary antioxidant usually used in this field for use; For example be selected from three (2, the 4-di-tert-butyl-phenyl) phosphorous acid esters (phosphite ester kind antioxidant 168), Tyox B (organic sulfide DLTP) and thio-2 acid SUNSOFT Q-182S (organic sulfide DSTP).Above-mentioned primary antioxidant and auxiliary antioxidant can be through being purchased acquisition.
According to polyolefine resin composition provided by the invention; The said polyolefine resin composition of per kilogram surface greater than the number of defects of 100 μ m be 0, volume specific resistance less than 100 Ω m, be preferably 10-60 Ω m; Elongation at break is preferably 250-350% greater than 200%.
The preparation method of polyolefine resin composition provided by the invention comprises, polar polyolefin, non-polar polyolefinic and graphitized carbon black is mixing under 140-170 ℃ temperature, extruding pelletization, impurity screening under 165-200 ℃ temperature; Mix with linking agent.
This method is specially; Adopt reciprocating kneading machine that polar polyolefin resin, non-polar polyolefinic and graphitized carbon black and optional adjuvants such as lubricant, oxidation inhibitor, dispersion agent, processing aid etc. are mixed extruding pelletization simultaneously according to proportioning under 140-170 ℃ temperature, and synchronous filtering fall the impurity of granularity greater than 100 μ m; Get into the dynamic mixture device after the granulation, sneaked into the linking agent homogenizing 16-36 hour, then cooling by proportioning.
Equipment that uses in the aforesaid method such as reciprocating kneading machine, dynamic mixture device etc. and raw material all can be commercially available.
Application Areas to polyolefine resin composition of the present invention has no particular limits, and comprises the various fields of needs shielding, like the manufacturing of various shielding materials.This polyolefine resin composition especially is suitable for cable shield.
The present invention also provides cable to use shielding material, and this cable comprises the said polyolefins resin combination with shielding material.
The present invention also provides cable, and this cable comprises that above-mentioned cable uses shielding material.
Adopt the mode of embodiment below, technical scheme of the present invention is described further.Yet these embodiment do not constitute limitation of the scope of the invention.And, equipment that employed equipment and raw material all are commercially available in following examples and raw material.
Embodiment 1
(VA content is 28%, and density is 0.935g/cm with the vinyl-vinyl acetate copolymer (EVA) of 65 mass parts
3, melting index is that (density is 0.922g/cm for the new LDPE (film grade) of 6g/10min (190 ℃, 2.16kg)), 15 mass parts
3Melting index is (190 ℃ of 2.0g/10min; 2.16kg)), the antioxidant 300 of the graphitized carbon black (resistivity 500 Ω, median size 50 μ m, oil-absorption(number) 2.0ml/g) of 40 mass parts and 8 mass parts adds in the reciprocating kneading machine under 140-170 ℃ temperature; Uniform mixing and extruding pelletization, 165-200 ℃ temperature synchronous filtering falls the impurity of granularity greater than 100 μ m;
Get into the dynamic mixture device after the granulation, under 60-120 ℃ temperature, add 2 mass parts linking agent Di Cumyl Peroxide 99s, 30 hours postcooling of homogenizing obtain polyolefine resin composition.
Embodiment 2
(EA content 18%, density are 0.89g/cm with the ethylene-propylene acetoacetic ester (EEA) of 55 mass parts
3, melting index is that (density is 0.922g/cm for the linear low density polyethylene of 5g/10min (190 ℃, 2.16kg)), 20 mass parts
3Melting index is (190 ℃ of 2.0g/10min; 2.16kg)), the antioxidant 300 of the graphitized carbon black (resistivity 200 Ω, median size 30 μ m, oil-absorption(number) 1.5ml/g) of 30 mass parts and 10 mass parts adds in the reciprocating kneading machine under 140-170 ℃ temperature; Uniform mixing and extruding pelletization, synchronous filtering fall the impurity of granularity greater than 100 μ m;
Get into the dynamic mixture device after the granulation, under 60-120 ℃ temperature, add 1.8 mass parts linking agent Di Cumyl Peroxide 99s, 30 hours postcooling of homogenizing obtain polyolefine resin composition.
Embodiment 3
(MA content 10%, density are 0.90g/cm with the ethylene-methyl acrylate copolymer (EMA) of 60 mass parts
3, melting index is that (density is 0.922g/cm for the new LDPE (film grade) of 4g/10min (190 ℃, 2.16kg)), 5 mass parts
3Melting index is (190 ℃ of 2.0g/10min; 2.16kg)), the antioxidant 300 of the graphitized carbon black (resistivity 100 Ω, median size 30 μ m, oil-absorption(number) 2.5ml/g) of 50 mass parts and 1 mass parts adds in the reciprocating kneading machine under 140-170 ℃ temperature; Uniform mixing and extruding pelletization, synchronous filtering fall the impurity of granularity greater than 100 μ m;
Get into the dynamic mixture device after the granulation, under 60-120 ℃ temperature, add 5 mass parts linking agent Di Cumyl Peroxide 99s, 30 hours postcooling of homogenizing obtain polyolefine resin composition.
Comparative example 1
(VA content is 28%, and density is 0.935g/cm with the vinyl-vinyl acetate copolymer (EVA) of 65 mass parts
3, melting index is that (density is 0.922g/cm for the new LDPE (film grade) of 6g/10min (190 ℃, 2.16kg)), 15 mass parts
3Melting index is that the antioxidant 300 of graphitized carbon black (resistivity 500 Ω, median size 50 μ m, oil-absorption(number) 2.0ml/g) and 5 mass parts of 2.0g/10min (190 ℃, 2.16kg)), 60 mass parts adds in the reciprocating kneading machine under 140-170 ℃ temperature uniform mixing and extruding pelletization; Get into the dynamic mixture device after the granulation; Under 60-120 ℃ temperature, add 2 mass parts linking agent Di Cumyl Peroxide 99s, 16 hours postcooling of homogenizing obtain polyolefine resin composition.
Performance test
1, the preparation of sample
Getting polyolefine resin composition and be placed on the vulcanizing press, is 190 ℃ at crosslinking temperature, and oil press pressure is under the 15MPa, is cooled to room temperature then.Make II type dumb-bell shape, thickness is 1.0 ± 0.1mm coupons, coupons is should be smooth bright and clean, thickness evenly, no bubble.
2, the testing method of sample performance
(1) tensile strength and elongation at break
According to the regulation among the GB/T 1040, to the coupons that obtains of above-mentioned preparation draw speed tested for tensile strength and elongation at break with (250 ± 50) mm/min.
(2) elongation and cooled permanent set under heat is extended
According to the regulation among the GB/T 5470, be 200 ℃ with the coupons that obtains of above-mentioned preparation in temperature, loading is that 0.2MPa, stretching time carry out heat under 15 minutes the condition to extend test.Then, remove load and be cooled to room temperature, test cooled permanent set.
(3) volume specific resistance
According to the regulation among the GB/T 1410 the above-mentioned coupons for preparing is tested.
(4) surface imperfection number (smooth finish)
Polyolefine resin composition is used the single screw extrusion machine of Φ 30 under 110 ℃, extrude width as 30-50mm, thickness as 300-500 μ m lengthy motion picture, detect surface imperfection with optical detector.
Resulting polyolefine resin composition in the foregoing description 1-3 and the comparative example 1 is prepared coupons by the method for making sample in the above-mentioned performance test, and carry out performance test according to above-mentioned testing method, the result sees table 1.
Table 1
Data from table 1 can find out that the surface imperfection number of the embodiment of the invention is very low to be 0, thereby surface smoothness is very high, and the equal conformance with standard of other performance index.Thereby therefore will can be applied to the screen layer of the power cable of 110-500kV through the polyolefine resin composition that preparation method of the present invention obtains.
Claims (19)
1. polyolefine resin composition, this polyolefine resin composition comprises polar polyolefin, non-polar polyolefinic, graphitized carbon black and linking agent,
Wherein, the said polyolefine resin composition of per kilogram surface greater than the number of defects of 100 μ m be 0, volume specific resistance less than 100 Ω m, elongation at break greater than 200%.
2. polyolefine resin composition according to claim 1; Wherein, the content of said polar polyolefin is the 40-70 mass parts, and the content of said non-polar polyolefinic is the 5-20 mass parts; The content of said graphitized carbon black is the 30-50 mass parts, and the content of said linking agent is the 0.5-5 mass parts.
3. polyolefine resin composition according to claim 1 and 2, wherein, the density of said polar polyolefin is 0.88-0.96g/cm
3, melting index be 0.5-10g/10min (190 ℃, 2.16kg).
4. polyolefine resin composition according to claim 3, wherein, said polar polyolefin is the multipolymer of ethene, and the content of vinyl monomer is 70-98mol% in this multipolymer.
5. polyolefine resin composition according to claim 4; Wherein, said polar polyolefin is selected from one or more in vinyl-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-methyl acrylate copolymer and the methyl acrylate-ethylene-ethyl acetate copolymer.
6. polyolefine resin composition according to claim 1 and 2, wherein, wherein, the density of said non-polar polyolefinic is 0.860-0.950g/cm
3, melting index be 0.1-50g/10min (190 ℃, 2.16kg).
7. polyolefine resin composition according to claim 6, wherein, said non-polar polyolefinic is selected from one or more in the ethylene copolymer of alhpa olefin copolymerization of Vilaterm, ethylene-propylene rubber(EPR), ethene and at least a 3-12 of a having carbon atom.
8. polyolefine resin composition according to claim 1 and 2, wherein, the resistivity of said graphitized carbon black＜10
3Ω, median size＜50 μ m, oil-absorption(number)>=1.25ml/g.
9. polyolefine resin composition according to claim 1 and 2, wherein, said linking agent is the peroxide linking agent.
10. the preparation method of the described polyolefine resin composition of claim 1, this method comprises:
Polar polyolefin, non-polar polyolefinic and graphitized carbon black is mixing under 140-170 ℃ temperature, extruding pelletization, impurity screening under 165-200 ℃ temperature; Mix with linking agent then.
11. method according to claim 10; Wherein, the consumption of said polar polyolefin is the 40-70 mass parts, and the consumption of said non-polar polyolefinic is the 5-20 mass parts; The consumption of said graphitized carbon black is the 30-50 mass parts, and the consumption of said linking agent is the 0.5-5 mass parts.
12. according to claim 10 or 11 described polyolefine resin compositions, wherein, the density of said polar polyolefin is 0.88-0.96g/cm
3, melting index be 0.5-10g/10min (190 ℃, 2.16kg).
13. polyolefine resin composition according to claim 12, wherein, said polar polyolefin is the multipolymer of ethene, and the content of vinyl monomer is 70-98mol% in this multipolymer.
14. polyolefine resin composition according to claim 13; Wherein, said polar polyolefin is selected from one or more in vinyl-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-methyl acrylate copolymer and the methyl acrylate-ethylene-ethyl acetate copolymer.
15. according to claim 10 or 11 described polyolefine resin compositions, wherein, wherein, the density of said non-polar polyolefinic is 0.860-0.950g/cm
3, melting index be 0.1-50g/10min (190 ℃, 2.16kg).
16. polyolefine resin composition according to claim 15, wherein, said non-polar polyolefinic is selected from one or more in the ethylene copolymer of alhpa olefin copolymerization of Vilaterm, ethylene-propylene rubber(EPR), ethene and at least a 3-12 of a having carbon atom.
17. according to claim 10 or 11 described polyolefine resin compositions, wherein, the resistivity of said graphitized carbon black＜10
3Ω, median size＜50 μ m, oil-absorption(number)>=1.25ml/g.
18. a cable is used shielding material, this cable comprises each described polyolefine resin composition among the claim 1-8 with shielding material.
19. a cable, this cable comprise that the described cable of claim 18 uses shielding material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105917521A CN102532635A (en) | 2010-12-09 | 2010-12-09 | Ultra-smooth shielding material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105917521A CN102532635A (en) | 2010-12-09 | 2010-12-09 | Ultra-smooth shielding material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102532635A true CN102532635A (en) | 2012-07-04 |
Family
ID=46340753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105917521A Pending CN102532635A (en) | 2010-12-09 | 2010-12-09 | Ultra-smooth shielding material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102532635A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107129625A (en) * | 2017-05-09 | 2017-09-05 | 上海贝恩科电缆有限公司 | A kind of elevator cable semi-conductive screen CABLE MATERIALS and preparation method thereof |
| CN107312227A (en) * | 2017-07-21 | 2017-11-03 | 国网辽宁省电力有限公司丹东供电公司 | 35kV injection molding type joint injection molding material and manufacturing process |
| CN107325389A (en) * | 2017-07-31 | 2017-11-07 | 江苏德威新材料股份有限公司 | A kind of high-tension cable anti-incipient scorch semi-conductive shielding material and preparation method thereof |
| CN107903482A (en) * | 2017-11-07 | 2018-04-13 | 广州市欧橡隔热材料有限公司 | A kind of preparation method of permanent antistatic, conduction EVA |
| CN111320802A (en) * | 2018-12-17 | 2020-06-23 | 佳能株式会社 | Resin molded article and method for producing same |
| US10726976B2 (en) | 2016-06-30 | 2020-07-28 | Dow Global Technologies Llc | Semiconductive shield free of weld lines and protrusions |
| CN115322472A (en) * | 2022-08-30 | 2022-11-11 | 深圳供电局有限公司 | Semiconductive shielding material based on compound resin and preparation method and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101817950A (en) * | 2010-04-29 | 2010-09-01 | 上海科悦高分子材料有限公司 | Screen material for 35kV grade high/medium voltage crosslinked cable conductor layer and preparation method thereof |
-
2010
- 2010-12-09 CN CN2010105917521A patent/CN102532635A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101817950A (en) * | 2010-04-29 | 2010-09-01 | 上海科悦高分子材料有限公司 | Screen material for 35kV grade high/medium voltage crosslinked cable conductor layer and preparation method thereof |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10726976B2 (en) | 2016-06-30 | 2020-07-28 | Dow Global Technologies Llc | Semiconductive shield free of weld lines and protrusions |
| CN107129625A (en) * | 2017-05-09 | 2017-09-05 | 上海贝恩科电缆有限公司 | A kind of elevator cable semi-conductive screen CABLE MATERIALS and preparation method thereof |
| CN107312227A (en) * | 2017-07-21 | 2017-11-03 | 国网辽宁省电力有限公司丹东供电公司 | 35kV injection molding type joint injection molding material and manufacturing process |
| CN107312227B (en) * | 2017-07-21 | 2020-01-17 | 国网辽宁省电力有限公司丹东供电公司 | 35kV injection molding type joint injection molding material and manufacturing process |
| CN107325389B (en) * | 2017-07-31 | 2020-09-25 | 江苏德威新材料股份有限公司 | Scorch-resistant semi-conductive shielding material for high-voltage cable and preparation method thereof |
| CN107325389A (en) * | 2017-07-31 | 2017-11-07 | 江苏德威新材料股份有限公司 | A kind of high-tension cable anti-incipient scorch semi-conductive shielding material and preparation method thereof |
| CN107903482A (en) * | 2017-11-07 | 2018-04-13 | 广州市欧橡隔热材料有限公司 | A kind of preparation method of permanent antistatic, conduction EVA |
| CN107903482B (en) * | 2017-11-07 | 2020-03-17 | 广州市欧橡隔热材料有限公司 | Preparation method of permanently antistatic conductive EVA |
| CN111320802A (en) * | 2018-12-17 | 2020-06-23 | 佳能株式会社 | Resin molded article and method for producing same |
| CN111320802B (en) * | 2018-12-17 | 2024-02-09 | 佳能株式会社 | Resin molded article and method for producing same |
| CN115322472A (en) * | 2022-08-30 | 2022-11-11 | 深圳供电局有限公司 | Semiconductive shielding material based on compound resin and preparation method and application thereof |
| CN115322472B (en) * | 2022-08-30 | 2023-09-12 | 深圳供电局有限公司 | Semiconductive shielding material based on compound resin and preparation method and application thereof |
| WO2024045419A1 (en) * | 2022-08-30 | 2024-03-07 | 南方电网科学研究院有限责任公司 | Semi-conductive shielding material based on compound resin, preparation method therefor and use thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102532635A (en) | Ultra-smooth shielding material | |
| CA2843308C (en) | Energy cable having a thermoplastic electrically insulating layer | |
| CN100356482C (en) | Cable with recycable covering layer | |
| US3951871A (en) | Deformation resistant shielding composition | |
| CN105612209B (en) | Preparation is blended in thermoplasticity for cable insulation | |
| AU2010366056B2 (en) | Energy cable having stabilized dielectric resistance | |
| CN102532679A (en) | Low-thermal-shrinkage low-smoke halogen-free flame retardant sheath material for optical cable and preparation method | |
| CN101440180A (en) | Polyolefin based non-linear dielectric material | |
| US20130206453A1 (en) | Semiconductive polyolefin composition which contains epoxy-groups | |
| KR100819607B1 (en) | Composition for production improved flame retardant insulating and sheath material of halogen free type, insulating materials and insulatin cable using the same | |
| CN107266780B (en) | Non-crosslinked semiconductive shielding material for power cable and preparation method thereof | |
| WO2010047469A1 (en) | Thermoplastic polyurethane elastomer-based composition for insulation layers and electric cable equipped therewith | |
| CN115216082B (en) | Semiconductive shielding material with improved peeling strength, preparation method, product and cable | |
| CN104231420A (en) | 105 DEG C Temperature-resist grade irradiation crosslinked low smoke halogen-free flame retardant insulation material and preparation method thereof | |
| CN108203546B (en) | Chemically-crosslinked elastomer cable material for new energy automobile high-voltage wire capable of being used at 175 ℃ for long time, preparation method of chemically-crosslinked elastomer cable material and cable | |
| CN102558660A (en) | Strippable semi-conductive shielding material for ethylene propylene rubber cable | |
| CN103467806B (en) | Low temperature resistant fireproofing cable material without halide of a kind of scrape resistant and preparation method thereof | |
| CN102532637B (en) | Insulating material for high-voltage direct-current feeder cable | |
| KR20120095309A (en) | Cable including insulation layer with non-crosslinking resin | |
| CN114516985B (en) | Insulating coating material and application thereof | |
| CN102321346A (en) | But a kind of cross-linking radiation high temperature resistant halogen-free flame-retardant polyester elastomer materials and preparation method thereof | |
| CA3029340C (en) | Semiconductive shield free of weld lines and protrusions | |
| CN112795107B (en) | High-insulativity EPDM (ethylene-propylene-diene monomer) insulating material for power cable and preparation method thereof | |
| CN108239322A (en) | A kind of high rigidity poly-ethylene cable material and preparation method thereof | |
| CN114685874B (en) | Semiconductive polyolefin sheath material for submarine cable and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 311305 No. 63, South Ring Road, Ling'an Economic Development Zone, Zhejiang Applicant after: Zhejiang Wanma Macromolecule Material Co., Ltd. Address before: 311305 No. 63, South Ring Road, Ling'an Economic Development Zone, Zhejiang Applicant before: Zhejiang Wanma Macromolecule Material Co., Ltd. |
|
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120704 |