公开(公告)号：EP1423743A1

公开(公告)日：2004-06-02

申请号：EP02767616.2

申请日：2002-09-02

申请人： Emtelle UK Limited

发明人： BROWN, George Henry Platt ,  STOCKTON, David John

IPC分类号： G02B6/44

CPC分类号： G02B6/4438 ,  G02B6/4464

摘要： A tube assembly (1) comprises a dummy tube (2) formed from extruded medium density polyethylene and five primary tubes (3), also formed from extruded medium density polyethylene, and placed around the dummy tube (2). The primary tubes (3) are also provided with a co-extruded lining (not shown) on the internal surface thereof to minimise static attraction and friction between the tubes (3) and optical fibre units (not shown) subsequently installed into the tubes (3). The tubes (2, 3) and a rip cord (4), for subsequently removing the covering layers of the assembly to gain access to the tubes (2, 3), are surrounded by an outer sheath (5) formed from extruded medium density polyethylene. The outer sheath (5) is provided with a non-metallic water barrier (6), and is surrounded by a lubricant polymer layer (7) containing a polyethylene based lubricant compound, the active constituent of the lubricant being an organic silicone slip agent.

公开(公告)号：EP1423743B1

公开(公告)日：2005-11-23

申请号：EP02767616.2

申请日：2002-09-02

申请人： Emtelle UK Limited

发明人： BROWN, George Henry Platt ,  STOCKTON, David John

IPC分类号： G02B6/44

CPC分类号： G02B6/4438 ,  G02B6/4464

摘要： A tube assembly (1) comprises a dummy tube (2) formed from extruded medium density polyethylene and five primary tubes (3), also formed from extruded medium density polyethylene, and placed around the dummy tube (2). The primary tubes (3) are also provided with a co-extruded lining (not shown) on the internal surface thereof to minimise static attraction and friction between the tubes (3) and optical fibre units (not shown) subsequently installed into the tubes (3). The tubes (2, 3) and a rip cord (4), for subsequently removing the covering layers of the assembly to gain access to the tubes (2, 3), are surrounded by an outer sheath (5) formed from extruded medium density polyethylene. The outer sheath (5) is provided with a non-metallic water barrier (6), and is surrounded by a lubricant polymer layer (7) containing a polyethylene based lubricant compound, the active constituent of the lubricant being an organic silicone slip agent.

公开(公告)号：EP1504298A2

公开(公告)日：2005-02-09

申请号：EP03784228.3

申请日：2003-06-26

申请人： Emtelle UK Limited

发明人： BROWN, George Henry Platt ,  STOCKTON, David John ,  COCKBURN, Kevin Thomas ,  McILWREATH, Greig, Iain

IPC分类号： G02B6/44

CPC分类号： G02B6/4438 ,  G02B6/4403 ,  G02B6/4411

摘要： A cable (302) has (8) fibres (304) are encapsulated by a UV curable layer (306) having a diameter of approximately (1010) microns, and (16) outer fibres (316) arranged in a circular formation around the inner fibres (304). The optical fibres (304) are held in position by means of the UV curable layer (306) so that the UV curable material of the layer (306) does not penetrate into the gaps between the optical fibres (304) and the outermost optical fibres (304) are restrained by the layer from moving axially. It is found that such an arrangement provides surprisingly favourable bending properties, making the cable particularly suitable for installation in a tube by means of blowing.

公开(公告)号：EP1636888A1

公开(公告)日：2006-03-22

申请号：EP04725955.1

申请日：2004-04-06

申请人： Emtelle UK Limited

发明人： STOCKTON, David John ,  TAYLOR, Jonathan Paul

IPC分类号： H02G9/06 ,  H02G1/08 ,  G02B6/44

CPC分类号： H02G1/08 ,  F16L9/133 ,  G02B6/4438 ,  G02B6/4459 ,  G02B6/4464 ,  H02G9/06

摘要： A co-extruded tube (2) for receiving fibre optic cables by blowing comprises an outer layer (4) co-extruded with an inner layer (6). The tube (2) has an outer diameter of 5 mm; an inner diameter of 3.5 mm and the radial thickness of the inner layer lining material is approximately 0.1 mm. The outer layer (4) is formed from low-density polyethylene (LDPE). The inner layer (6) is a high-density polyethylene (HDPE) carrier containing a blend of polyamide and polyether block amides with a silicone slip agent. The blend is produced by combining these ingredients using heat and pressure and a thermoplastic compounding line.