公开(公告)号：US20210238012A1

公开(公告)日：2021-08-05

申请号：US17050562

申请日：2018-05-07

Applicant: EHC Canada, Inc.

Inventor： Qingping Guo ,  Andrew Oliver Kenny ,  Reginald Anthony Butwell ,  James Ryan Sabadin ,  Jason Wong ,  Hani E. Naguib ,  Wanqiao Wang ,  Linghong Li ,  Ali Owais Anwer ,  Muhammad Abdul Samad Anwer

IPC: B66B23/24 ,  B32B5/18 ,  B32B27/40 ,  B32B27/08 ,  B29C44/20 ,  B29C44/24 ,  B29C44/50

Abstract: In a handrail including a carcass, a stretch inhibitor within the carcass, and a sliding layer bonded to the carcass, at least a portion of the carcass has a gas phase dispersed in a solid polymer matrix. The gas phase can reduce a density of the carcass by at least 5% or 10%, or about 15%, as compared to a density of the polymer matrix. The carcass can have a generally uniform distribution of gas bubbles in the polymer matrix, which can define a generally closed cell structure in the polymer matrix. The gas phase can be formed of particles of a syntactic foam dispersed in the polymer matrix. The handrail can further include a cover. The carcass and the cover can be formed of thermoplastic materials, and the cover can represent between 10 and 30% of the overall TPU required for the handrail.

公开(公告)号：US11975943B2

公开(公告)日：2024-05-07

申请号：US17050562

申请日：2018-05-07

Applicant: EHC Canada, Inc.

Inventor： Qingping Guo ,  Andrew Oliver Kenny ,  Reginald Anthony Butwell ,  James Ryan Sabadin ,  Jason Wong ,  Hani E. Naguib ,  Wanqiao Wang ,  Linghong Li ,  Ali Owais Anwer ,  Muhammad Abdul Samad Anwer

IPC: B66B23/24 ,  B29C44/20 ,  B29C44/24 ,  B29C44/50 ,  B32B5/18 ,  B32B27/08 ,  B32B27/40 ,  B29K105/04

CPC classification number: B66B23/24 ,  B29C44/20 ,  B29C44/24 ,  B29C44/50 ,  B32B5/18 ,  B32B27/08 ,  B32B27/40 ,  B29K2105/046 ,  B29K2105/048 ,  B32B2266/0278 ,  B32B2307/536 ,  B32B2307/732

Abstract: In a handrail including a carcass, a stretch inhibitor within the carcass, and a sliding layer bonded to the carcass, at least a portion of the carcass has a gas phase dispersed in a solid polymer matrix. The gas phase can reduce a density of the carcass by at least 5% or 10%, or about 15%, as compared to a density of the polymer matrix. The carcass can have a generally uniform distribution of gas bubbles in the polymer matrix, which can define a generally closed cell structure in the polymer matrix. The gas phase can be formed of particles of a syntactic foam dispersed in the polymer matrix. The handrail can further include a cover. The carcass and the cover can be formed of thermoplastic materials, and the cover can represent between 10 and 30% of the overall TPU required for the handrail.