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PVC material for extra-high voltage cable outer sheath and preparation method thereof

A PVC material and ultra-high voltage technology, applied in the field of PVC material and its preparation for the outer sheath of ultra-high voltage cables, can solve the problems of workshop environmental pollution, volume resistivity instability, etc., to solve workshop environmental pollution and solve volume resistivity unstable effect

Pending Publication Date: 2019-11-26
ANHUI CHUZHO DEWEI NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the above-mentioned defects in the prior art, and provides a PVC material for an outer sheath of an ultra-high voltage cable and a preparation method thereof, which mainly solves the problem of unstable volume resistivity of the PVC material for an outer sheath of an ultra-high voltage cable and problems caused during the production process. The problem of environmental pollution in the workshop

Method used

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  • PVC material for extra-high voltage cable outer sheath and preparation method thereof
  • PVC material for extra-high voltage cable outer sheath and preparation method thereof
  • PVC material for extra-high voltage cable outer sheath and preparation method thereof

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preparation example Construction

[0027] The preparation method of the conductive black paste is as follows: After starting the three-roll mill, adjust the gap between the middle and rear rolls to 0.2 mm, press the baffle plate, add the second plasticizer, and wait until the second plasticizer is evenly covered with the rolls. Then add conductive carbon black, adjust the handwheel of the front roller, so that the front roller slowly touches the middle roller, when the surface of the front roller is completely covered with slurry, lock the fixing nut, and then adjust the angle of the discharge plate, the slurry can be discharged evenly, use Fineness scraper to control the fineness of conductive black paste.

[0028] The conductive carbon black is one or more selected from Czech CHEZACARB AC 80, CABOT VXC72 and Degussa PRINTEX XE2-B.

[0029] The first plasticizer and the second plasticizer are one or more independently selected from DIDP, DPHP and DINP.

[0030] The polyvinyl chloride resin is one or more sele...

Embodiment 1

[0040] Embodiment 1 provides a kind of PVC material for extra-high voltage cable outer sheath, and it comprises the component of following parts by weight:

[0041] 100 parts of polyvinyl chloride resin; (HG-1300)

[0042] 30 parts of the first plasticizer; (DPHP)

[0043] 8 parts of calcium zinc stabilizer; (Bear brand MC92539)

[0044] 0.4 part of antioxidant; (antioxidant 1010)

[0045] 12 parts of calcium carbonate; (Rieter LD-1000C)

[0046] 0.4 parts of lubricant; (calcium stearate)

[0047] 8 parts of flame retardant; (antimony trioxide)

[0048] 55 parts of conductive black paste. (the ratio of parts by weight of the second plasticizer and conductive carbon black is 1.5:1, wherein the second plasticizer (DPHP) is 33 parts, conductive carbon black (Czech CHEZACARB AC 80) is 22 parts)

[0049] First prepare the conductive black paste: After starting the three-roll mill, adjust the gap between the middle and rear rolls to 0.2mm, press the baffle plate, add the secon...

Embodiment 2

[0054] Embodiment 2 provides a PVC material for an extra-high voltage cable outer sheath. Its preparation method is exactly the same as in Embodiment 1, except that its raw material components are different, and it includes the following components in parts by weight:

[0055] 100 parts of polyvinyl chloride resin; (HG-1300)

[0056] 25 parts of the first plasticizer; (DPHP)

[0057] 6 parts of calcium zinc stabilizer; (Bear brand MC92539)

[0058] 0.5 part of antioxidant; (antioxidant 1010)

[0059] 10 parts of calcium carbonate; (Rieter LD-1000C)

[0060] 0.5 parts of lubricant; (calcium stearate)

[0061] 10 parts of flame retardant; (antimony trioxide)

[0062] 50 parts of conductive black paste. (wherein the second plasticizer (DPHP) is 30 parts, conductive carbon black (Czech CHEZACARB AC80) is 20 parts)

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Abstract

The invention discloses a PVC material for an extra-high voltage cable outer sheath. The PVC material comprises the following components by weight: 100 parts of polyvinyl chloride (PVC) resin; 25-35 parts of a first plasticizer; 6-10 parts of a calcium zinc stabilizer; 0.3-0.5 part of an antioxidant; 10-15 parts of calcium carbonate; 0.3-0.5 part of a lubricant; 6-10 parts of a flame retardant; and 50-60 parts of a conductive black color paste. The conductive black color paste includes a second plasticizer and conductive carbon black, and is prepared by grinding the second plasticizer and conductive carbon black, the weight part ratio of the second plasticizer and the conductive carbon black is 1.4-1.6:1, and the fineness of the conductive black color paste is less than 15microm. The invention adopts the conductive black color paste to replace conventional conductive carbon black powder, is blended with the PVC resin, and improves the electrical conductivity of the PVC material. The PVC material and an extra-high voltage cable outer sheath are co-extruded, can be closely combined with the extra-high voltage cable outer sheath, the volume resistivity is stably controlled at 15omega.cm or below, and at the same time, the defects of workshop environmental pollution, unstable volume resistivity and the like caused by flying conductive carbon black in conventional process productionare solved.

Description

technical field [0001] The invention relates to a PVC material for an outer sheath of an ultra-high voltage cable and a preparation method thereof. Background technique [0002] EHV cables are mainly composed of conductors, conductor shielding layers, insulating layers, insulating shielding layers, buffer layers (longitudinal water blocking layers), metal sheaths, and non-metallic outer sheaths. As the outermost protective layer of the EHV cable, the non-metallic outer sheath mainly protects the metal sheath, insulates the metal sheath from the ground, and avoids the circulation of the metal sheath due to multi-point grounding, causing fire and other accidents. The ultra-high voltage outer sheath plays a very important role in protecting the internal structure of the cable. Graphite powder has been used as the outer electrode of the cable sheath when performing DC withstand voltage tests on the outer sheath. However, graphite has the disadvantages of being easy to fall off a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K13/06C08K9/04C08K3/26C08K3/04
CPCC08K3/04C08K3/26C08K9/04C08K13/06C08K2003/265C08K2201/001C08K2201/005C08L27/06
Inventor 陆威邓之俊吴万昌李庆琦余西保庄丽娜章柏松
Owner ANHUI CHUZHO DEWEI NEW MATERIAL
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