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Electrical cable with improved installation and durability performance

a technology of installation and durability, applied in the direction of insulating conductors/cables, plastic/resin/waxes insulators, polyamide coatings, etc., to achieve the effect of reducing the coefficient of friction of the outermost surface and reducing the required installation pulling force of the cabl

Pending Publication Date: 2021-04-15
SOUTHWIRE CO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The additives remain suspended and dispersed within the polymer matrix, providing enhanced abrasion resistance, UV protection, and reduced friction, which decreases the installation force required and improves the cable's durability and weatherability.

Problems solved by technology

However, certain additives may have negative effects on the structural integrity, durability or weatherability of an underlying polymer of extruded cable sheaths that may be used for underground transmission and distribution applications and / or for above-ground applications in which sheathed cables are pulled through conduits or other installation paths, and accordingly a need exists for new additive configurations providing desirable protective properties for extruded polymeric cable sheaths of electrical cables.

Method used

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  • Electrical cable with improved installation and durability performance

Examples

Experimental program
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Effect test

example 1

[0051]A coating composition that may be extruded around an outer surface of a conductor to form a medium-voltage, TR-XLPE underground distribution (UD) cable may be formed including the components listed in Table 1.

TABLE 1ComponentAmountLLDPE (BASE RESIN)86wt %Dow Corning ® MB25-502 Masterbatch8wt %(LOW FRICTION)McLube MoS2-98 (molybdenum disulfide)3wt %AEROSIL R 8200 (fumed silica)2wt %Zano 20 (zinc oxide)1wt %Total100wt %

[0052]The components may be mixed within an extruder, or prior to extrusion (e.g., as pellets / powders, as melted components, and / or the like). The components are extruded at a temperature of between about 215-250° C. onto an outer surface of a conductor. The resulting coated conductor requires a significantly reduced amount of force to pull the conductor though a building passageway than a similar conductor (e.g., having the same gauge) without the inclusion of the various additives. Moreover, the resulting cable has an improved resistance to UV-based degradation,...

example 2

[0053]A coating composition that may be extruded around an outer surface of a conductor to form a medium-voltage UD cable (e.g., EPR coated) may be formed including the components listed in Table 2.

TABLE 2ComponentAmountLLDPE (BASE RESIN)93wt %Dow Corning ® MB25-035 Masterbatch3wt %(LOW FRICTION)McLube MoS2-98 (molybdenum disulfide)2wt %AEROSIL R 8200 (fumed silica)1wt %Zano 20 (zinc oxide)1wt %Total100wt %

[0054]The components may be mixed within an extruder, or prior to extrusion (e.g., as pellets / powders, as melted components, and / or the like). The components are extruded at a temperature of between about 215-250° C. onto an outer surface of a conductor. The resulting coated conductor requires a significantly reduced amount of force to pull the conductor though a building passageway than a similar conductor (e.g., having the same gauge) without the inclusion of the various additives. Moreover, the resulting cable has an improved resistance to UV-based degradation, abrasion and moi...

example 3

[0055]A coating composition that may be extruded around an outer surface of a conductor to form a medium-voltage, TR-XLPE UD cable may be formed including the components listed in Table 3.

TABLE 3ComponentAmountHOPE (BASE RESIN)85wt %Dow Corning ® MB50-314 Masterbatch4wt %(LOW FRICTION)McLube MoS2-100 (molybdenum disulfide)4wt %AEROSIL R 8125 (fumed silica)5wt %Zano 20 plus (zinc oxide)2wt %Total100wt %

[0056]The components may be mixed within an extruder, or prior to extrusion (e.g., as pellets / powders, as melted components, and / or the like). The components are extruded at a temperature of between about 215-260° C. onto an outer surface of a conductor. The resulting coated conductor requires a significantly reduced amount of force to pull the conductor though a building passageway than a similar conductor (e.g., having the same gauge) without the inclusion of the various additives. Moreover, the resulting cable has an improved resistance to UV-based degradation, abrasion and moisture...

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Abstract

An electrical cable having improved abrasion resistance, hydrophobicity, and / or UV protecting properties comprises a conductor having a protecting sheath and / or jacket comprising a base polymer (such as a thermoplastic or thermoset) having an abrasion reducing agent, a lubricant, a hydrophobic agent, and / or a UV protecting agent mixed therein. The resulting cable jacket and / or cable sheath defines an outer surface having improved abrasion reduction properties, lubricating properties, hydrophobic properties, and / or UV protecting properties.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This patent application is a continuation of U.S. patent application Ser. No. 16 / 441,210, filed Jun. 14, 2019, which claims priority from U.S. Provisional Patent Application Ser. No. 62 / 685,144, filed Jun. 14, 2018, which is incorporated herein by reference in its entirety.BACKGROUND[0002]Electrical cables used for installation within buildings, in underground installations, and / or in exposed installation configurations typically include a cable sheath surrounding a conductor. The cable sheath provides electrical insulation properties, and may further provide environmental protections against damage to the cable, including abrasion resistance, moisture resistance, heat resistance, oil resistance, and gasoline resistance, as well as resistance against incidental mechanical damage that may result from unintended “dig-ins” from shovels or other digging equipment hitting underground cables or nail sets when fasteners are driven into cables em...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C09D7/61C09D177/00C09D7/63C09D123/06C09D5/00H01B3/46H01B3/30C09D7/65H01B13/14
CPCC09D7/61C09D177/00C09D7/63C09D123/06H01B13/14H01B3/465H01B3/305C09D7/65C09D5/00C09D123/04C09D177/02H01B13/24H05K3/00
Inventor HAWIG, YUHSIN
Owner SOUTHWIRE CO LLC