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Polymer blend for cable jackets

a technology of polymer blend and cable jacket, which is applied in the direction of insulated conductors, cables, cables, etc., can solve the problems of high cost of tpu polymer, failure of primary outer insulation jackets, and high environmental conditions of heavy equipment cables, so as to reduce the amount of tpu used, the effect of high flexibility

Inactive Publication Date: 2019-02-14
NEXANS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is using a polymer blend of PVB and TPU to create the jacket of a heavy equipment cable. This blend is able to manage fire resistance issues and maintain mechanical strength, while also reducing costs by limiting the use of TPU. PVB is commonly used in automotive and architectural fields and is recycled in large quantities with high quality levels. Using recycled PVB offers environmental and economic advantages, as well as being green compliant with eco-design approach. Overall, this invention offers a cost-effective, flexible, and environmentally friendly solution for creating the jacket of a heavy equipment cable.

Problems solved by technology

Heavy equipment cables, such as mining cables or other industrial work site cables are subject to very rugged environmental conditions and operating parameters that include dragging and moving against rough surfaces.
Such environmental stresses and abrasion can lead to failure of the primary outer insulation jacket.
However, TPU polymer is quite expensive.
Also, the other two polymers CPE and CR are halogenated and thus produce toxic smoke.
Also, elastomer solutions like CPE or CR have the additional disadvantage that they have to be crosslinked after extrusion, which results in additional working steps to finish the cable.
This results in additional production costs and time in comparison to thermoplastics like TPU.
In severe mining applications an abraded jacket can lead to cable failure.

Method used

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  • Polymer blend for cable jackets
  • Polymer blend for cable jackets
  • Polymer blend for cable jackets

Examples

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Embodiment Construction

[0015]The present arrangement as shown in FIG. 2 illustrates an exemplary cable 10 that is used in the mining industry. Among other elements, cable 10 has an outer jacket 12, insulated conductors 14, a filler 16, ground wires 18 and a ground check wire 20.

[0016]In one example insulated conductors 14 are constructed as three separate 2AWG (American Wire Gauge) tinned copper conductors insulated with ethylene propylene rubber. Filler 16 is positioned in the center of cable 10 to maintain the spacing of conductors 14. Ground wires 18 may be constructed of 7AWG tinned copper covered in polyester tape. Ground check 20 may be constructed with 8AWG tinned copper and insulted with polypropylene.

[0017]Applicants note that cable 10 is an exemplary construction of the type of cables, such as a mining cable that the present TPU / PVB polymer blend may be applied as a jacket. However, the salient features of the present arrangement, and in particular the polymer blend used for jacket 12, may be us...

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Abstract

A cable has one or more conductors and a jacket. The jacket is made from a composition including a polymer blend of thermoplastic polyurethane (TPU), and Polyvinylbutyral (PVB), with the ratio of PVB to TPU being up to 49% PVB by weight of the total weight of the polymer blend, the remainder of the polymer blend being TPU.

Description

BACKGROUNDField of the Invention[0001]This invention relates to a polymer blend for use as a cable jacket. More particularly this invention relates to a polymer blend for use as an abrasion and fire resistant cable jacket for heavy industry cables, such as mining cables, automation cables and the like.Description of Related Art[0002]Heavy equipment cables, such as mining cables or other industrial work site cables are subject to very rugged environmental conditions and operating parameters that include dragging and moving against rough surfaces. Such environmental stresses and abrasion can lead to failure of the primary outer insulation jacket.[0003]Because of these conditions, mining cables, as one example, need to meet stringent safety standards. The Insulated Cable Engineers Association (ICEA) sets a standard that includes several mechanical thresholds for cable jackets ICEA S75-381. See Table 1 below. [0004]Also, the MSHA (Mine Safety and Health Administration) sets forth the re...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C08L75/04H01B7/295
CPCC08L75/04H01B7/295C08L2201/02C08L2203/202C08L75/08H01B3/302C08K2003/387C08L29/14C08K5/34928C08K5/5313C08K3/38H01B3/428C08L75/06C08L59/04
Inventor MALHEURTY, LAUREENEBILLEMAZ, DIDIER
Owner NEXANS
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