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US 2004/0109650 A1Published application
Fiber optic cable demonstrating improved dimensional stability
AssigneeJudd Wire, Inc.
InventorsYoung Joon Kim, Francis A. Gnatek, Jeffrey S. Doak
Life of this patent
Estimating the term…
Abstract
A fiber optic cable that employs a dual layer jacket and that demonstrates improved dimensional stability over a wide temperature range, is provided. In a preferred embodiment, the inventive cable is flame-retardant and, upon flaming, smoke suppressed and non-hazardous.
Claims34
A fiber optic cable that comprises:
- (a) at least one optical fiber;
- (b) a primary buffer member circumferentially surrounding each optical fiber;
- (c) optionally, a heat insulating and dimensionally stabilizing member circumferentially surrounding the primary buffer member;
- (d) a secondary buffer member circumferentially surrounding either the primary buffer member or the heat insulating and dimensionally stabilizing member;
- (e) a strength member circumferentially surrounding the secondary buffer member;
- and
- (f) a dual layer jacket circumferentially surrounding the strength member, which comprises a heat or pressure sealed, low-shrinkage polymer film inner layer, and an outer protective layer.
4 more elements
A fiber optic cable that comprises:
- (a) at least one optical fiber;
- (b) a primary buffer member comprising a polyimide coating circumferentially surrounding the optical fiber(s);
- (c) a secondary buffer member comprising a high temperature fluoropolymer extruded around the primary buffer member;
- (d) a strength member comprising straight aromatic polyamide fibers axially extending and circumferentially surrounding the secondary buffer member;
- and
- (e) a dual layer jacket comprising a heat-fused, spirally wrapped, low-shrinkage polyimide tape inner layer, and an extruded fluoropolymer outer layer.
3 more elements
A fiber optic cable that comprises:
- (a) at least one optical fiber;
- (b) a primary buffer member comprising an acrylate coating circumferentially surrounding the optical fiber(s);
- (c) a heat insulating and dimensionally stabilizing member comprising twisted or helically orientated, aromatic polyamide fibers spirally wrapped around the primary buffer member;
- (d) a secondary buffer member comprising a high temperature fluoropolymer extruded around the heat insulating and dimensionally stabilizing member;
- (e) a strength member comprising straight aromatic polyamide fibers axially extending and circumferentially surrounding the secondary buffer member;
- and
- (f) a dual layer jacket comprising a heat-fused, spirally wrapped, low-shrinkage polyimide tape inner layer, and an extruded fluoropolymer outer layer.
4 more elements
A process for preparing a fiber optic cable, which comprises:
- (a) forming a primary buffer member on at least one optical fiber;
- (b) optionally, forming a heat insulating and dimensionally stabilizing member on the primary buffer member;
- (c) forming a secondary buffer member on either the primary buffer member or the heat insulating and dimensionally stabilizing member;
- (d) forming a strength member on the secondary buffer member;
- and
- (e) forming a dual layer jacket on the strength member by
- i. wrapping a low-shrinkage polymer film in an overlapping fashion along a portion or length of the strength member,
- ii. optionally, heating the low-shrinkage polymer film to a temperature sufficient to cause overlapping regions of the film to bond,
- iii. forming an outer protective layer on the inner layer, and
- iv. optionally, crosslinking the outer protective layer.
7 more elements
Dependencies are inferred from the claim text.