Tension member and polymer jacket assembly including a geometry stabilizer in the jacket

Patent metadata

Field	Value
Publication number	US-9555579-B2
Application number	US-201314026554-A
Country	US
Kind code	B2
Filing date	Sep 13, 2013
Priority date	Jan 3, 2011
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

An exemplary assembly includes at least one elongated tension member. A jacket covers at least some of the tension member. The polymer jacket comprises a polymer material including a melamine based geometry stabilizer that facilitates maintaining the jacket material near the tension member if the assembly is subjected to a high temperature condition.

First claim

We claim:

1. A method of making an assembly having at least one elongated cord tension member at least partially covered by a polymer jacket, comprising the steps of:
mixing a polymer base resin and a melamine-based geometry stabilizer to provide a batch of mixed material, the geometry stabilizer being operative to form a stable, intumescent shell on an exterior of the jacket of the assembly responsive to a fire condition;
compounding said batch of mixed material with polyurethane to provide a batch of jacket material; and
forming the jacket material into a desired shape of the jacket.

2. The method of claim 1 , wherein the geometry stabilizer comprises phosphate.

3. The method of claim 1 , wherein the geometry stabilizer comprises at least one of melamine-phosphate or melamine-polyphosphate.

4. The method of claim 1 , wherein the mixing comprises using an amount corresponding up to 50% by weight of the geometry stabilizer in the batch of mixed material.

5. The method of claim 4 , wherein the mixing comprises using an amount corresponding to between 20% and 50% by weight of the geometry stabilizer in the batch of mixed material.

6. The method of claim 1 , wherein the mixing comprises using an amount corresponding to about 20% by weight of the geometry stabilizer in the batch of mixed material.

7. The method of claim 1 , wherein the compounding comprises using an amount corresponding to between about 2% and about 20% by weight of the geometry stabilizer in the jacket material.

8. The method of claim 1 , comprising
applying the jacket material to the at least one elongated cord tension member while forming the jacket material.

9. The method of claim 1 , wherein, the geometry stabilizer is capable of maintaining the jacket material near the tension member of the assembly.

Assignees

• Otis Elevator Co

Inventors

• Krishnan Gopal R
• Yu Xiaomei
• Wesson John P
• Milton-Benoit John M

Classifications

• B29C63/22 Primary

  using layers or sheathings having a shape adapted to the shape of the article (B29C63/26 {and B29C63/38} take precedence) · CPC title

• B29C70/70

  Completely encapsulating inserts {(B29C70/86 takes precedence)} · CPC title

• B66B23/24

  Handrails (driving gear therefor B66B23/02; tensioning means therefor B66B23/16; preventing jamming thereof by foreign objects B66B29/04; accessories therefor B66B31/02) · CPC title

• D07B7/145 Primary

  Coating or filling-up interstices · CPC title

• D07B1/22

  Flat or flat-sided ropes; Sets of ropes consisting of a series of parallel ropes · CPC title