JPS632085B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a tape-like woven optical transmission device in which a tape-like woven body woven using optical fibers as warp threads is impregnated with a thermosetting resin to make it semi-cured. It's about lines.

Conventionally, tape-shaped optical transmission lines have generally been made by arranging optical fibers in parallel and coating the periphery with a thermoplastic resin. However, since such tape-shaped optical transmission lines use thermoplastic resin as a protective coating, the transmission loss increases significantly due to shrinkage of the protective coating at low temperatures, and if even a portion of the optical transmission line is exposed to high temperatures, Since the protective coating becomes soft, it is also unsuitable for applications such as equipment wiring materials.

In order to create a tape-shaped optical transmission line that eliminates these drawbacks, it is conceivable to cover optical fibers arranged in parallel with FRP as a protective coating, but in this way, the flexibility of the tape-shaped optical transmission line There are disadvantages in that the performance is impaired and wiring work is hindered.

An object of the present invention is to provide a tape-like woven optical transmission line that can improve low-temperature characteristics, heat resistance, and flexibility during wiring and installation.

The tape-like woven optical transmission line of the present invention has a tape-like woven body impregnated with a thermosetting resin, which is woven using an optical fiber wire and reinforcing glass fiber as the warp thread and glass fiber as the weft thread. In such a tape-like woven optical transmission line, the thermosetting resin is in a semi-cured state (B stage), so it is not sticky and has sufficient flexibility for practical use. We aim to improve low-temperature properties and heat resistance by naturally curing the thermosetting resin at an appropriate time after that, or by forcibly curing it by heating it at 80°C to 140°C for several tens of minutes. It's a theory.

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a first embodiment of the present invention. The tape-like woven optical transmission line of this example is
A tape-shaped woven body 3 woven using optical fiber strands 1 and reinforcing glass fibers 5 as warp threads and glass fibers 2 as weft threads is impregnated with thermosetting resin 4 to become semi-cured. It is something that exists. As the reinforcing glass fiber 5, for example, a roving or yarn having approximately the same diameter as the optical fiber wire 1 is used. As the glass fiber 2 as the weft, for example, roving, yarn, etc. are used.

Such a tape-like woven optical transmission line has sufficient flexibility because the thermosetting resin 4 is in a semi-hardened state. Therefore, wiring and installation can be easily performed. If the thermosetting resin 4 is then cured by heating or naturally after wiring or installation, the thermosetting resin 4 will be completely cured, the heat resistance will be improved, and the reinforcing glass fiber 5 used as the warp will be stiffened. This serves to suppress the shrinkage of the thermosetting resin 4 at low temperatures, prevent microbending of the optical fiber 5, and prevent reduction in transmission loss.

FIG. 2 shows a second embodiment of the invention. In the tape-like woven optical transmission line of this embodiment, the diameter of the reinforcing glass fiber 5 is larger than the diameter of the optical fiber strand 1.

In this way, the reinforcing glass fiber 5 receives lateral pressure from the surface direction of the tape, protects the optical fiber 1, and further improves lateral pressure resistance.

FIG. 3 shows a third embodiment of the present invention. The tape-like woven optical transmission line of this embodiment uses rovings as reinforcing glass fibers 5, which are longitudinally attached to both sides of the optical fiber 1, and these are used as warp threads.
Glass fibers 2 are woven as weft threads, and the obtained tape-like woven body 3 is impregnated with a thermosetting resin 4 to be in a semi-cured state. In this case, the reinforcing glass fibers 5 attached to both sides of the optical fiber strand 1 are tightened by the weft glass fibers 2 and come to surround the optical fiber strand 1.

In this way, the lateral pressure resistance can be further improved.

As explained above, the tape-like woven optical transmission line according to the present invention uses a mixture of optical fiber wire and reinforcing glass fiber as the warp, and is impregnated with thermosetting resin and is in a semi-cured state. It has the advantage that it has excellent flexibility during wiring and installation, and that the thermosetting resin hardens after wiring and installation, suppressing an increase in transmission loss at low temperatures and improving heat resistance.

[Brief explanation of the drawing]

1 to 3 are cross-sectional views of first to third embodiments of the tape-like woven optical transmission line according to the present invention. 1...Optical fiber wire, 1A...Optical fiber,
1B... Protective layer, 2... Glass fiber, 3... Tape-like woven body, 4... Thermosetting resin, 5... Glass fiber for reinforcement.

Claims (1)

[Claims] 1. A tape-like woven body woven using optical fiber wire and reinforcing glass fiber as the warp and glass fiber as the weft, which is impregnated with a thermosetting resin and is in a semi-cured state. Naruko transmission line.