High-hardness central-tube-strengthened ratproof optical cable and manufacturing technology thereof

Abstract

The invention relates to a high-hardness central-tube-strengthened ratproof optical cable. The high-hardness central-tube-strengthened ratproof optical cable comprises a plurality of optical fibers, a glass fiber yarn and an outer sheath sequentially from inside to outside. A central tube sleeves the optical fibers and is filled with water resistant materials, the glass fiber yarn is uniformly arranged on the outer circumference of the central tube, and the outer sheath which is a high-hardness low-smoke halogen-free flame retardant polyolefin sheath is arranged outside the glass fiber yarn. The high-hardness central-tube-strengthened ratproof optical cable has the advantages that the glass fiber yarn serves as a strengthening part of the optical cable; by means of adopting the central tube structure, arranging the high-density glass fiber yarn outside the central tube and then manufacturing the high-hardness low-smoke halogen-free flame retardant polyolefin sheath layer by extruding, requirements of indoor wiring and outdoor wiring can be met; a novel structural design and technical control are adopted, so that the problem of excess length of an inner tightening sleeve of the central tube is solved, the problems of thick external diameter, high dead weight, inconvenience in construction and the like of the optical cable can be also solved, and accordingly a brand new optical fiber is provided for FTTx (fiber-to-the-x) construction of our country.

Description

technical field [0001] The invention belongs to the field of communication optical cables, and in particular relates to a high-hardness central tube reinforced rat-proof optical cable and a manufacturing process thereof. Background technique [0002] There are several rodents living in the wild, mountainous areas and other lush vegetation. The rodents have well-developed incisors and will continue to grow. They need to bite objects to keep their teeth sharp, and the unique smell contained in the plastic in the cable sheath is easy to attract rodents. Therefore, the communication optical cable lines are often bitten by rats in some occasions, which affects the communication quality, and even leads to the terminal of the trunk communication network and causes great losses to the society. In addition, in some buildings in the urban area, the upper space of the ceiling, between the stairs and in the wiring shaft are also places where rat activities are relatively rampant. Theref...

AI Technical Summary

Problems solved by technology

[0005] The traditional all-dielectric anti-rodent distribution optical cable generally uses multiple tight-buffered optical fibers to directly cover the outside of the anti-rat material glass fiber yarn, and then extrude a layer of low-smoke, halogen-free, flame-retardant polyolefin sheath to form a cable. The tight sleeve is scattered in the glass fiber yarn, and the anti-rodent performance of some tight-buffered optical fibers cannot meet the requirements of full-section anti-rat, which brings great loss to communication

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