Elevator load bearing assembly having a jacket with multiple polymer compositions

摘要

An elevator load bearing assembly (30) includes a jacket (34) having different portions comprising different polymer compositions. In a disclosed example, a plurality of tension members (32) are at least partially surrounded by a first portion (36) comprising a first polymer composition. A second portion (38) establishes at least one exterior surface (40) of the jacket (34) and comprises a second polymer composition. In one example, a surface-modifying agent is added to alter the composition of at least a portion of the jacket (34). In another example, co-extrusion techniques using different polymer compositions establish different portions of the jacket (34).

主权项

1. An elevator system, comprising:
an elevator car; and a load bearing assembly suspending the elevator car, the load bearing assembly including at least one elongated tension member; and a polymer jacket at least partially surrounding the tension member, the polymer jacket having a first portion that interfaces with the tension member and a second portion that defines an exterior surface of the jacket, the first portion comprising a first polymer composition and the second portion comprising a second, at least partially different polymer composition, wherein the first polymer composition comprises a first polyurethane and the second polymer composition comprises a second, different polyurethane.