Anti-contraction optical cable and production method thereof

Abstract

The invention relates to the technical field of optical transmission communication carrier, in particular to an anti-contraction optical cable. The anti-contraction optical cable comprises a loose tube arranged at the center of the optical cable, a protection layer (3) covering the loose tube, a sheath layer (1) covering the protection layer, an reinforcer (2) arranged between the sheath layer and the protection layer and a plurality of optical fibers (6) arranged in the loose tube. The anti-contraction optical cable is characterized in that tube bodies (4) and grooves (5) are alternately distributed on the outer surface of the loose tube in sequence, the inner surface of the protection layer is provided with corresponding bulges, and the gap between the loose tube and the protection layer is stuffed with water blocking matters. The invention also discloses a production method of the anti-contraction optical cable. The invention has the advantages that the cable has less contraction, easier stripping, wide temperature adaptation scope, simple production process and high finished product yield.

Description

technical field [0001] The invention relates to the technical field of optical transmission and communication carriers, in particular to an optical cable capable of preventing shrinkage and a manufacturing method thereof. Background technique [0002] Due to the large amount of information transmitted, optical cables are increasingly widely used in the field of communication transmission. Commonly used optical cables in the field of communication include central bundle tube type, layer twisted type and skeleton type; central tube type optical cable is a structural form in existing optical cables, which includes a loose tube located in the center of the cable, and the loose tube contains multiple The loose tube is also coated with a protective layer to prevent water and moisture from entering the cable and then penetrates along the longitudinal direction of the cable, and the sheath layer is placed outside the protective layer; when the external temperature of this type of op...

AI Technical Summary

Problems solved by technology

Commonly used optical cables in the field of communication include central bundle tube type, layer twisted type and skeleton type; central tube type optical cable is a structural form in existing optical cables, which includes a loose tube located in the center of the cable, and the loose tube contains multiple The loose tube is also coated with a protective layer to prevent water and moisture from entering the cable and then penetrates along the longitudinal direction of the cable, and the sheath layer is placed outside the protective layer; when the external temperature of this type of optical cable changes, the loose tube will A certain degree of shrinkage will occur, which will cause the optical fiber in the tube to be stressed, and when the optical system is laid in an area with a large temperature difference, this situation will be further aggravated, and even cause communication interruption accidents

So far, the industry has studied the optical cable that prevents the retraction of the loose tube; the application date is 2005.8.25, the application number is 200520106358.9, the authorized announcement number is CN 2824073Y, and the name is: a retractable, fully water-blocking, easy-to-open strip The optical cable is uniformly and continuously coated with waterproof adhesive on the central bundle tube, and the central bundle tube is adhered to the outer sheath to achieve anti-shrinkage; although this method achieves the purpose of anti-shrinkage, the optical cable is not easy to peel off

The application date is 2000.12.27, the application number is 00264096.1, the authorized announcement number is CN 2456180Y, and the name is: a central tube type optical cable to prevent the retraction of the bundle tube. The hot-melt adhesive rings that are closely connected with each other to prevent shrinkage have the same disadvantages as the above-mentioned patents; the application date is 2006.1.13, the application number is 200680005231.15, the publication number is CN 101120277A, and the name is: low-shrinkage telecommunication optical cable and its manufacture method, the shrinkage reduction piece made of liquid crystal polymer is placed between the jacket and the buffer layer to achieve anti-shrinkage; although the anti-shrinkage function is achieved, the liquid crystal polymer itself is expensive and difficult to place during processing, so it is practical Poor performance, high cost, low yield

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