Elevator
US-9573792-B2 · Feb 21, 2017 · US
Method of making a cord and polymer jacket assembly having a flame retardant in the polymer jacket material
US10072162B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10072162-B2 |
| Application number | US-201313913711-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 10, 2013 |
| Priority date | Aug 15, 2008 |
| Publication date | Sep 11, 2018 |
| Grant date | Sep 11, 2018 |
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- Title
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Abstract
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An illustrative method of making an elevator load bearing member having at least one elongated tension member at least partially covered by a jacket includes mixing a flame retardant with a polymer material. The flame retardant is selected from a group consisting of (i) a halogen-free melamine based intumescent comprising melamine cyanurate, melamine-phosphate, melamine pyrophosphate or melamine polyphosphate in an amount up to about 20% by weight of the thermoplastic polymer or (ii) a filled polymer having a nanoscale filler chemically bonded to a matrix phase. Applying the mixed flame retardant and polymer material to the tension member forms a jacket of a desired shape.
First claim
Opening claim text (preview).
We claim: 1. A method of making an elevator load bearing member, the method comprising: applying a thermoplastic polymer material to at least one elongated tension member to form a jacket of a desired shape, wherein the formed jacket includes a plurality of voids in the formed jacket; and at least partially filling the plurality of voids in the formed jacket with a flame retardant material, wherein the flame retardant material comprises at least one of a halogen-free melamine based intumescent, a nanoscale filler, carbon nanotubes, and carbon nanofibers. 2. The method of claim 1 , wherein the flame retardant material comprises the halogen-free melamine based intumescent and the flame retardant material comprises at least one of melamine cyanurate, melamine-phosphate, melamine pyrophosphate or melamine polyphosphate. 3. The method of claim 1 , wherein the flame retardant material comprises the nanoscale filler and the flame retardant material comprises polyhedral oligomeric silsesquioxane. 4. The method of claim 1 , comprising chemically bonding the flame retardant material to the formed jacket.
Assignees
Inventors
Classifications
- D07B1/16Primary
Ropes or cables with an enveloping sheathing or inlays of rubber or plastics (D07B1/04, D07B1/10 take precedence) · CPC title
Flat or flat-sided ropes; Sets of ropes consisting of a series of parallel ropes · CPC title
being of the coated type · CPC title
Polyurethane resins · CPC title
characterised by the materials used · CPC title
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- What does patent US10072162B2 cover?
- An illustrative method of making an elevator load bearing member having at least one elongated tension member at least partially covered by a jacket includes mixing a flame retardant with a polymer material. The flame retardant is selected from a group consisting of (i) a halogen-free melamine based intumescent comprising melamine cyanurate, melamine-phosphate, melamine pyrophosphate or melamin…
- Who is the assignee on this patent?
- Otis Elevator Co
- What technology area does this patent fall under?
- Primary CPC classification D07B1/16. Mapped technology areas include Textiles & Paper.
- When was this patent published?
- Publication date Tue Sep 11 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).