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Rope and polymer sheath assembly with flame retardant in polymer sheath material

A polymer material, flame retardant technology, used in the field of rope and polymer sheath components

Active Publication Date: 2016-03-30
OTIS ELEVATOR CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One challenge when considering the manufacture of such a refractory sheath is maintaining the required quality of the sheath material

Method used

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  • Rope and polymer sheath assembly with flame retardant in polymer sheath material
  • Rope and polymer sheath assembly with flame retardant in polymer sheath material
  • Rope and polymer sheath assembly with flame retardant in polymer sheath material

Examples

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Embodiment Construction

[0015] Assemblies designed according to embodiments of the present invention include flame retardants in the polymer jacket material. As used in this description, "flame retardant" means to inhibit or prevent the spread of fire. In some instances, the flame retardant inhibits or prevents the spread of fire by self-extinguishing. The ability to completely stop a fire may depend on the amount of exposure to the flame source. In most cases, the fire retardant will at least form a charred surface and dilute the oxygen content in the surrounding air, thereby limiting or inhibiting any fire spread otherwise associated with burning the sheath.

[0016] figure 1 Selected portions of an exemplary elevator system 20 are shown schematically. Elevator car 22 and counterweight 24 are suspended by load bearing assembly 26 . In one example, carrier assembly 26 includes a plurality of flat belts. In another example, the carrier assembly 26 includes a plurality of round ropes. Other elev...

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PUM

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Abstract

An exemplary assembly includes at least one elongate tension member. A sheath covers at least some of the tension member. The sheath includes a polymer material. The assembly includes a flame retardant selected from the group consisting of a halogen-free melamine-based blowing agent or a filled polymer having nanoscale fillers chemically bonded to the matrix phase.

Description

technical field [0001] The present invention relates to elevator systems, in particular to a rope and polymer sheath assembly having a flame retardant in the polymer sheath material of an elevator system, and a method of making the same. Background technique [0002] There are many uses for elongated flexible components, eg for elevator load bearing parts or rope arrangements, eg drive belts for machinery such as moving walks and handrails for moving walks. Such an assembly may be designed with multiple cords covered by a polyurethane sheath. For example, US Patent Nos. 6,295,799 and 6,739,433 show belts for suspending an elevator car and counterweight in an elevator system. An exemplary moving walk handrail configuration is shown in US Patent No. 4,982,829. An exemplary moving walk drive belt is shown in US Patent No. 6,540,060. [0003] One aspect of such an assembly is the potential for combustion when the sheath is in a combustion-inducing environment, such as when ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D07B1/16C08K5/549
CPCB66B7/062B66B23/24C08K5/0066D07B1/16D07B1/162D07B2201/2087D07B2201/2092D07B2205/2064D07B2401/2035D07B1/22D07B2205/2003Y10T428/239Y10T428/23D07B2801/22C08K5/549B66B7/06C09D5/185
Inventor 于小梅G·R·克里什南J·P·维森J·M·米尔顿-伯努瓦W·R·施米德特
Owner OTIS ELEVATOR CO