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Compact, Hybrid Fiber Reinforced Rods For Optical Cable Reinforcements And Method For Making Same

Inactive Publication Date: 2013-05-09
HAGER THOMAS P +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent is about a new process for making a stronger and more resilient fiber optic cable reinforcement rod. The rod is made by coating fibers with a UV curable vinyl ester resin matrix and a thermoplastic topcoat. The fibers can be S-type or E-type glass fibers, or a combination of both. The resin matrix can be a thermosetting or thermally curable resin. The fiber reinforcement rod is then topcoated with a thermoplastic hot melt resin such as polybutylene terephthalate / polyether glycol copolymer. This topcoating provides better adhesion, environmental protection, and resistance to surface fiber breakage and delamination. It also allows for faster line speeds and reduces waste output, leading to significant cost savings.

Problems solved by technology

Optical fiber transmission cables are inevitably subjected to tensile loads during the manufacture, handling, installation, and, in some cases, the service life of the cables.
Further, strung cables are subject to tensile loads as a result of the cables themselves and due to atmospheric conditions such as wind and ice.

Method used

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  • Compact, Hybrid Fiber Reinforced Rods For Optical Cable Reinforcements And Method For Making Same
  • Compact, Hybrid Fiber Reinforced Rods For Optical Cable Reinforcements And Method For Making Same
  • Compact, Hybrid Fiber Reinforced Rods For Optical Cable Reinforcements And Method For Making Same

Examples

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example 1

[0039]In one preferred embodiment of the present invention, the input glass used in the reinforcement rods 18 is multiple ends of elongated E-type glass fiber members 24 or multiple ends of elongated S-type glass fiber members 26 having a linear density or tex of approximately 200-4000 gm / km. The glass fiber members 24, 26 are sized with a vinyl ester compatible sizing. The glass fiber members 24, 26 are then coated with Vinch 500, an UV curable vinyl ester resin manufactured by Zeon Technologies. The Vinch 500 resin is an UV curable copolymer of novolac vinyl ester (approximately 55% by weight) and 1,6 hexane diol diacrylate (approximately 45% by weight) that is applied between approximately 65 and 100 degrees Celsius. The topcoat 32 applied is a polybutylene terephthalate / polyether glycol copolymer topcoat 32 such as Hytrel® G4778, manufactured by E.I. Du Pont de Nemours, which is pumped in at approximately 230 degrees Celsius.

[0040]Alternatively, the topcoat 32 could be an ethyle...

example 2

[0041]In another preferred embodiment of the present invention, the input glass used in the fiber reinforcement rods 18 is multiple ends of elongated E-type glass fiber members 24 or multiple ends of elongated S-type glass fiber members 26 having a linear density or tex of approximately 200-4000 gm / km. The glass fiber members 24, 26 are sized with a vinyl ester compatible sizing. The glass fiber members 24, 26 are then coated with 17-41B, an UV curable vinyl ester resin manufactured by Zeon Technologies. The 17-41B resin is an UV curable copolymer of novolac vinyl ester (approximately 50% by weight) and dipropylene glycol diacrylate (approximately 50% by weight) that is applied between approximately 65 and 100 degrees Celsius. The topcoat 32 applied is a polybutylene terephthalate / polyether glycol copolymer topcoat 32 such as Hytrel® 64778, manufactured by E.I. Du Pont de Nemours, which is pumped in at approximately 230 degrees Celsius.

[0042]Alternatively, the topcoat 32 could be an...

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Abstract

Fiber reinforcement rods having a combination of reinforcing fiber members coated with a UV curable vinyl ester resin material and a polybutylene terephthalate / polyether glycol or ethylene acrylic acid topcoat layer. The reinforcing fiber members may be S-type fiber members, E-type glass fiber members, a combination thereof, or E-type glass fiber members and / or S-type glass fiber members with high strength synthetic strands of poly(p-phenylene 2,6 benzoisoxazole fiber members. The topcoat layer provides enhanced properties of specific adhesion, enhanced environmental protection, resistance to surface fiber breakage, and to some degree resistance from delamination.

Description

TECHNICAL FIELD AND INDUSTRIAL APPLICABILITY OF THE INVENTION[0001]The present invention relates generally to optical cables and more specifically to compact, hybrid fiber reinforced rods for optical cable reinforcements.BACKGROUND OF THE INVENTION[0002]Fiberoptic cables are commonly used to provide electronic communication in a wide variety of indoor and outdoor communication systems. Optical fiber transmission cables generally comprise one or more optical transmission fibers provided with one or more sheathings of synthetic resin material. In addition, in order to provide the required mechanical strength, such cables are also provided with so-called strength members as reinforcement.[0003]Optical fiber transmission cables are inevitably subjected to tensile loads during the manufacture, handling, installation, and, in some cases, the service life of the cables. For example, the cables are sometimes subjected to substantial pulling forces when being installed from towers or in duct...

Claims

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Application Information

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IPC IPC(8): G02B6/04G02B6/44
CPCG02B6/4432G02B6/4486G02B6/449Y10T428/2933Y10T428/2964Y10T428/2938Y10T428/2936G02B6/04Y10T428/249946Y10T428/24994
Inventor HAGER, THOMAS P.LEHMAN, RICHARD N.
Owner HAGER THOMAS P