CN109354790A - Polyvinyl chloride insulating power cable sheath material and preparation method thereof - Google Patents
Polyvinyl chloride insulating power cable sheath material and preparation method thereof Download PDFInfo
- Publication number
- CN109354790A CN109354790A CN201811010473.4A CN201811010473A CN109354790A CN 109354790 A CN109354790 A CN 109354790A CN 201811010473 A CN201811010473 A CN 201811010473A CN 109354790 A CN109354790 A CN 109354790A
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- Prior art keywords
- power cable
- parts
- protective cover
- insulated power
- cover material
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- 239000000463 material Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000004800 polyvinyl chloride Substances 0.000 title abstract description 34
- 229920000915 polyvinyl chloride Polymers 0.000 title abstract description 34
- 239000000203 mixture Substances 0.000 claims abstract description 23
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 14
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 239000004014 plasticizer Substances 0.000 claims abstract description 7
- 239000006084 composite stabilizer Substances 0.000 claims abstract description 6
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract 2
- 239000011347 resin Substances 0.000 claims abstract 2
- 229920005989 resin Polymers 0.000 claims abstract 2
- 230000001681 protective effect Effects 0.000 claims description 32
- 235000006708 antioxidants Nutrition 0.000 claims description 13
- 239000003381 stabilizer Substances 0.000 claims description 7
- 150000002148 esters Chemical class 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000005453 pelletization Methods 0.000 claims description 6
- 238000006116 polymerization reaction Methods 0.000 claims description 6
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 5
- 229910052788 barium Inorganic materials 0.000 claims description 5
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 5
- 229920000570 polyether Polymers 0.000 claims description 5
- 229910052725 zinc Inorganic materials 0.000 claims description 5
- 239000011701 zinc Substances 0.000 claims description 5
- 239000004808 2-ethylhexylester Substances 0.000 claims description 4
- KRADHMIOFJQKEZ-UHFFFAOYSA-N Tri-2-ethylhexyl trimellitate Chemical compound CCCCC(CC)COC(=O)C1=CC=C(C(=O)OCC(CC)CCCC)C(C(=O)OCC(CC)CCCC)=C1 KRADHMIOFJQKEZ-UHFFFAOYSA-N 0.000 claims description 4
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 4
- MGFRKBRDZIMZGO-UHFFFAOYSA-N barium cadmium Chemical compound [Cd].[Ba] MGFRKBRDZIMZGO-UHFFFAOYSA-N 0.000 claims description 4
- 229940065285 cadmium compound Drugs 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 4
- PWWSSIYVTQUJQQ-UHFFFAOYSA-N distearyl thiodipropionate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCCCCCCCC PWWSSIYVTQUJQQ-UHFFFAOYSA-N 0.000 claims description 4
- 229920001596 poly (chlorostyrenes) Polymers 0.000 claims description 4
- 125000005591 trimellitate group Chemical group 0.000 claims description 4
- ZZMVLMVFYMGSMY-UHFFFAOYSA-N 4-n-(4-methylpentan-2-yl)-1-n-phenylbenzene-1,4-diamine Chemical compound C1=CC(NC(C)CC(C)C)=CC=C1NC1=CC=CC=C1 ZZMVLMVFYMGSMY-UHFFFAOYSA-N 0.000 claims description 3
- GHKOFFNLGXMVNJ-UHFFFAOYSA-N Didodecyl thiobispropanoate Chemical compound CCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCC GHKOFFNLGXMVNJ-UHFFFAOYSA-N 0.000 claims description 3
- OUBMGJOQLXMSNT-UHFFFAOYSA-N N-isopropyl-N'-phenyl-p-phenylenediamine Chemical compound C1=CC(NC(C)C)=CC=C1NC1=CC=CC=C1 OUBMGJOQLXMSNT-UHFFFAOYSA-N 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 abstract description 5
- 239000003365 glass fiber Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 235000019362 perlite Nutrition 0.000 abstract description 5
- 229920002647 polyamide Polymers 0.000 abstract description 5
- -1 polyethylene Polymers 0.000 abstract description 5
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 abstract description 4
- 239000004698 Polyethylene Substances 0.000 abstract description 4
- 239000000314 lubricant Substances 0.000 abstract description 4
- 229920000573 polyethylene Polymers 0.000 abstract description 4
- MIMDHDXOBDPUQW-UHFFFAOYSA-N dioctyl decanedioate Chemical compound CCCCCCCCOC(=O)CCCCCCCCC(=O)OCCCCCCCC MIMDHDXOBDPUQW-UHFFFAOYSA-N 0.000 abstract description 3
- 239000010451 perlite Substances 0.000 abstract description 2
- 239000000440 bentonite Substances 0.000 abstract 1
- 229910000278 bentonite Inorganic materials 0.000 abstract 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 abstract 1
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 abstract 1
- 238000005303 weighing Methods 0.000 abstract 1
- 238000009413 insulation Methods 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- 235000012216 bentonite Nutrition 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 2
- 229920000305 Nylon 6,10 Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- UJMDYLWCYJJYMO-UHFFFAOYSA-N benzenetricarboxylic Acid Natural products OC(=O)C1=CC=CC(C(O)=O)=C1C(O)=O UJMDYLWCYJJYMO-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/04—Antistatic
-
- 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
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Organic Insulating Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention provides a polyvinyl chloride insulating power cable sheath material and a preparation method thereof, wherein the polyvinyl chloride insulating power cable sheath material comprises the following components in parts by weight: 60-95 parts of polyvinyl chloride resin; 30-39 parts of dioctyl phthalate; 2-18 parts of dioctyl sebacate; 5-9 parts of a composite stabilizer; 0.2-0.8 part of polyethylene wax lubricant; 0.5-2.6 parts of antioxidant; 30-40 parts of an anti-aging agent; 0.01-0.1 part of high-temperature plasticizer; 0.1-1 part of antistatic master batch; 4-11 parts of perlite; 5-13 parts of bentonite; 5-9 parts of glass fiber; 5-9 parts of polyamide, which comprises the following steps: uniformly mixing the raw materials according to a proportion to obtain a mixture; and (4) extruding and granulating, cooling and weighing to obtain the polyvinyl chloride insulating power cable sheath material. The invention enhances the stability of the sheath of the polyvinyl chloride insulated power cable, improves the tensile strength of the cable, has simple process, saves cost and meets the use requirement of the polyvinyl chloride insulated power cable.
Description
Technical field
The present invention relates to power cable technical field more particularly to a kind of PVC insulated power cable protective cover material and its
Preparation method.
Background technique
Power cable is the cable for being used for transmission and distributing electric energy, and power cable is usually used in Urban Underground power grid, power station
Lead line, industrial and mining enterprises' in-line power and mistake river sea submarine transmission line, power cable is mainly by polyvinyl chloride insulation single line structure
At cable core and polyvinyl chloride oversheath composition.With the quickening of urbanization process, the fast development of electric power transmission and communication is right
The requirement of power cable is also higher and higher.The power cable used at this stage is in long-term work, traditional polyvinyl chloride insulation
It the stability of power cable sheath and wears no resistance, anti-external tensile force is undesirable, causes different degrees of fault to occur, shadow
It rings people normally to live and work, is unable to satisfy the use demand of PVC insulated power cable.
Summary of the invention
Present invention seek to address that the deficiencies in the prior art, and provide a kind of PVC insulated power cable protective cover material and its
Preparation method.
The present invention to achieve the above object, using following technical scheme:
A kind of PVC insulated power cable protective cover material, which is characterized in that its parts by weight composition is as follows:
Preferably, the average degree of polymerization of the Corvic is 1800-2400.
Preferably, the compound stabilizer is any one in barium/zinc composite stabilizer or barium cadmium compound stabilizer
Kind.
Preferably, the antioxidant is in antioxidant 1010, irgasfos 168, anti-oxidant DLTP or antioxidant DSTP
Any one.
Preferably, the anti-aging agent is any one in antioxidant 4010NA, antioxidant 4020 or anti-aging agent RD.
Preferably, the high temperature plasticization agent is any one in TOTM or trimellitate plasticizer.
Preferably, the antistatic master granule is one or both of polyether ester, nanoscale ATO mixture.
The preparation method of a kind of PVC insulated power cable protective cover material of the invention, which is characterized in that the steps include:
(1) parts by weight of each raw material are weighed according to formula；
(2) raw material in step (1) is put into high speed blender and is mixed, 100-110 DEG C at a temperature of, with
The speed of 800-1000r/min uniformly mixes 12-15min, obtains mixture；
(3) mixture is weighed after cooling by the extruding pelletization of 120-135 DEG C of temperature of progress on single screw extrusion machine,
Obtain PVC insulated power cable protective cover material.
The beneficial effects of the present invention are: the present invention provides a kind of PVC insulated power cable protective cover material and its preparation side
Method, by add compound stabilizer, enhance the stability of PVC insulated power cable sheath, by addition perlite,
Glass fibre and polyamide cooperate antistatic master granule, so that PVC insulated power cable protective cover material is with higher wear-resisting
Property, while the stretchable intensity of cable is improved, present invention process is simple, save the cost, reduces because of polyvinyl chloride insulation electricity
Fault caused by power cable jacket material ensure that people's normal life and work, meet polyvinyl chloride insulation electric power
The use demand of cable.
Specific embodiment
Below with reference to embodiment, the invention will be further described:
A kind of PVC insulated power cable protective cover material, which is characterized in that its parts by weight composition is as follows:
Preferably, the average degree of polymerization of the Corvic is 1800-2400.
Preferably, the compound stabilizer is any one in barium/zinc composite stabilizer or barium cadmium compound stabilizer
Kind.
Preferably, the antioxidant is in antioxidant 1010, irgasfos 168, anti-oxidant DLTP or antioxidant DSTP
Any one.
Preferably, the anti-aging agent is any one in antioxidant 4010NA, antioxidant 4020 or anti-aging agent RD.
Preferably, the high temperature plasticization agent is any one in TOTM or trimellitate plasticizer.
Preferably, the antistatic master granule is one or both of polyether ester, nanoscale ATO mixture.
The preparation method of a kind of PVC insulated power cable protective cover material of the invention, which is characterized in that the steps include:
(1) parts by weight of each raw material are weighed according to formula；
(2) raw material in step (1) is put into high speed blender and is mixed, 100-110 DEG C at a temperature of, with
The speed of 800-1000r/min uniformly mixes 12-15min, obtains mixture；
(3) mixture is weighed after cooling by the extruding pelletization of 120-135 DEG C of temperature of progress on single screw extrusion machine,
Obtain PVC insulated power cable protective cover material.
Embodiment 1
A kind of PVC insulated power cable protective cover material, parts by weight composition are as follows:
The average degree of polymerization of the Corvic is 1800.
Preparation method: to a kind of polychlorostyrene provided in this embodiment for preparing PVC insulated power cable protective cover material
The preparation method of ethylene insulated power cable protective cover material is described below:
(1) 60 parts of Corvics are weighed according to formula；30 parts of dioctyl phthalates；2 parts of dioctyl sebacates；
5 parts of barium/zinc composite stabilizers；0.2 part of polyethylene wax lubricant；0.5 part of antioxidant 1010；30 parts of antioxidant 4010NAs；0.01
Part TOTM plasticizer；0.1 part of polyether ester；4 parts of perlites；5 parts of bentonites；5 parts of glass fibres；5 parts of polyamide；
(2) raw material in step (1) is put into high speed blender and is mixed, 100 DEG C at a temperature of, with 800r/
The speed of min uniformly mixes 15min, obtains mixture；
(3) mixture is weighed after cooling, is obtained by the extruding pelletization of 120 DEG C of temperature of progress on single screw extrusion machine
PVC insulated power cable protective cover material.
Embodiment 2
A kind of PVC insulated power cable protective cover material, parts by weight composition are as follows:
The average degree of polymerization of the Corvic is 2000.
Preparation method: to a kind of polychlorostyrene provided in this embodiment for preparing PVC insulated power cable protective cover material
The preparation method of ethylene insulated power cable protective cover material is described below:
(1) 75 parts of Corvics are weighed according to formula；34 parts of dioctyl phthalates；8 parts of dioctyl sebacates；
7 parts of barium cadmium compound stabilizers；0.6 part of polyethylene wax lubricant；1.5 parts of anti-oxidant DLTPs；35 parts of anti-aging agent RDs；0.07 part partially
Benzenetricarboxylic acid ester plasticiser；0.6 part of nanoscale ATO；8 parts of perlites；9 parts of bentonites；7 parts of glass fibres；7 parts of polyamide；
(2) raw material in step (1) is put into high speed blender and is mixed, 105 DEG C at a temperature of, with 900r/
The speed of min uniformly mixes 14min, obtains mixture；
(3) mixture is weighed after cooling, is obtained by the extruding pelletization of 125 DEG C of temperature of progress on single screw extrusion machine
PVC insulated power cable protective cover material.
Embodiment 3
A kind of PVC insulated power cable protective cover material, parts by weight composition are as follows:
The average degree of polymerization of the Corvic is 2400.
Preparation method: to a kind of polychlorostyrene provided in this embodiment for preparing PVC insulated power cable protective cover material
The preparation method of ethylene insulated power cable protective cover material is described below:
(1) 95 parts of Corvics are weighed according to formula；39 parts of dioctyl phthalates；18 parts of decanedioic acid two are pungent
Ester；9 parts of barium/zinc composite stabilizers；0.8 part of polyethylene wax lubricant；2.6 parts of antioxidant DSTP；40 parts of antioxidant 4020s；0.1
Part trimellitate plasticizer；1 part of polyether ester；11 parts of perlites；13 parts of bentonites；9 parts of glass fibres；9 parts of polyamide；
(2) raw material in step (1) is put into high speed blender and is mixed, 110 DEG C at a temperature of, with 1000r/
The speed of min uniformly mixes 12min, obtains mixture；
(3) mixture is weighed after cooling, is obtained by the extruding pelletization of 135 DEG C of temperature of progress on single screw extrusion machine
PVC insulated power cable protective cover material.
The present invention is exemplarily described above, it is clear that present invention specific implementation is not subject to the restrictions described above,
As long as using the various improvement that the inventive concept and technical scheme of the present invention carry out, or not improved directly apply to other fields
It closes, it is within the scope of the present invention.
Claims (8)
1. a kind of PVC insulated power cable protective cover material, which is characterized in that its parts by weight composition is as follows:
2. a kind of PVC insulated power cable protective cover material according to claim 1, which is characterized in that the polychlorostyrene second
The average degree of polymerization of olefine resin is 1800-2400.
3. a kind of PVC insulated power cable protective cover material according to claim 1, which is characterized in that described compound steady
Agent is determined for any one in barium/zinc composite stabilizer or barium cadmium compound stabilizer.
4. a kind of PVC insulated power cable protective cover material according to claim 1, which is characterized in that the antioxidant
For any one in antioxidant 1010, irgasfos 168, anti-oxidant DLTP or antioxidant DSTP.
5. a kind of PVC insulated power cable protective cover material according to claim 1, which is characterized in that the anti-aging agent
For any one in antioxidant 4010NA, antioxidant 4020 or anti-aging agent RD.
6. a kind of PVC insulated power cable protective cover material according to claim 1, which is characterized in that the high temperature increases
Agent is moulded as any one in TOTM or trimellitate plasticizer.
7. a kind of PVC insulated power cable protective cover material according to claim 1, which is characterized in that described antistatic
Master batch is one or both of polyether ester, nanoscale ATO mixture.
8. a kind of preparation method of PVC insulated power cable protective cover material as described in claim 1, which is characterized in that its
Step are as follows:
(1) parts by weight of each raw material are weighed according to formula；
(2) raw material in step (1) is put into high speed blender and is mixed, 100-110 DEG C at a temperature of, with 800-
The speed of 1000r/min uniformly mixes 12-15min, obtains mixture；
(3) mixture is weighed after cooling, is obtained by the extruding pelletization of 120-135 DEG C of temperature of progress on single screw extrusion machine
PVC insulated power cable protective cover material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811010473.4A CN109354790A (en) | 2018-08-31 | 2018-08-31 | Polyvinyl chloride insulating power cable sheath material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811010473.4A CN109354790A (en) | 2018-08-31 | 2018-08-31 | Polyvinyl chloride insulating power cable sheath material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109354790A true CN109354790A (en) | 2019-02-19 |
Family
ID=65350381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811010473.4A Pending CN109354790A (en) | 2018-08-31 | 2018-08-31 | Polyvinyl chloride insulating power cable sheath material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109354790A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112794934A (en) * | 2020-12-14 | 2021-05-14 | 中广核拓普（四川）新材料有限公司 | Low molecular weight polyvinyl chloride, preparation method thereof, sheath material and preparation method thereof |
-
2018
- 2018-08-31 CN CN201811010473.4A patent/CN109354790A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112794934A (en) * | 2020-12-14 | 2021-05-14 | 中广核拓普（四川）新材料有限公司 | Low molecular weight polyvinyl chloride, preparation method thereof, sheath material and preparation method thereof |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190219 |
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| WD01 | Invention patent application deemed withdrawn after publication |