公开(公告)号：US20240217156A1

公开(公告)日：2024-07-04

申请号：US18147137

申请日：2022-12-28

Applicant: Dura-Line LLC

Inventor： Sam Lukubira ,  Caleb Michael Spradling ,  Gordon Mikel Roark ,  Arturo Valencia

IPC: B29C48/21

CPC classification number: B29C48/21 ,  B29C2791/003 ,  B29C2948/922 ,  B29K2023/065

Abstract: A conduit including a first concentric layer and a second concentric layer that are coextruded, the first concentric layer having a higher melt viscosity than the second concentric layer, and the first concentric layer being of a thickness of at least 3% of a combined thickness of the first and second concentric layers, is provided. Conduits further including third and fourth concentric layers and conduits further including at least one microduct within a lumen defined by the first concentric layer are further provided.

公开(公告)号：US11753601B2

公开(公告)日：2023-09-12

申请号：US17670796

申请日：2022-02-14

Applicant: Dura-Line LLC ,  Jin Chung

Inventor： H. Thomas Chung ,  Fei Fan ,  Sung Ki Cho ,  Sam Lukubira ,  Caleb Michael Spradling ,  Arturo Valencia

IPC: C10M169/04 ,  C10M103/02 ,  C10M107/38 ,  C10M107/50 ,  C10M111/04 ,  C10M143/02 ,  C10M147/02 ,  C10M157/02 ,  A47C27/00 ,  A47C31/00 ,  C10N40/32 ,  C10N50/08 ,  A47C27/04 ,  A47C27/20

CPC classification number: C10M169/041 ,  A47C27/002 ,  A47C31/001 ,  C10M103/02 ,  C10M107/38 ,  C10M107/50 ,  C10M111/04 ,  C10M143/02 ,  C10M147/02 ,  C10M157/02 ,  A47C27/001 ,  A47C27/04 ,  A47C27/20 ,  C10M2201/0413 ,  C10M2205/022 ,  C10M2213/02 ,  C10M2213/0623 ,  C10M2229/025 ,  C10N2040/32 ,  C10N2050/08

Abstract: A polymeric material mixture comprising a fluorine-containing polymer, a siloxane polymer, and at least two polymer processing additives (PPA), wherein the at least two polymer processing additives have different chemistries. For example, there can be a flexible coextruded pipe for providing a protective housing for cables, fluids, sludge or solids, the pipe comprising a pair of telescopically related inner and outer layers, where said inner layer is lubricated with the polymeric material mixture.

公开(公告)号：US11702612B2

公开(公告)日：2023-07-18

申请号：US17222245

申请日：2021-04-05

Applicant: Dura-Line LLC

Inventor： H. Thomas Chung ,  Fei Fan ,  Sung Ki Cho ,  Sam Lukubira ,  Caleb Michael Spradling ,  Arturo Valencia

IPC: C10M169/04 ,  C10M103/02 ,  C10M107/38 ,  C10M107/50 ,  C10M111/04 ,  C10M143/02 ,  C10M147/02 ,  C10M157/02 ,  A47C27/00 ,  A47C31/00 ,  C10N40/32 ,  C10N50/08 ,  A47C27/04 ,  A47C27/20

CPC classification number: C10M169/041 ,  A47C27/002 ,  A47C31/001 ,  C10M103/02 ,  C10M107/38 ,  C10M107/50 ,  C10M111/04 ,  C10M143/02 ,  C10M147/02 ,  C10M157/02 ,  A47C27/001 ,  A47C27/04 ,  A47C27/20 ,  C10M2201/0413 ,  C10M2205/022 ,  C10M2213/02 ,  C10M2213/0623 ,  C10M2229/025 ,  C10N2040/32 ,  C10N2050/08

Abstract: A polymeric material mixture comprising a fluorine-containing polymer, a siloxane polymer, and at least two polymer processing additives (PPA), wherein the at least two polymer processing additives have different chemistries. For example, there can be a flexible coextruded pipe for providing a protective housing for cables, fluids, sludge or solids, the pipe comprising a pair of telescopically related inner and outer layers, where said inner layer is lubricated with the polymeric material mixture.