High-strength folding-resistant indoor wiring optical cable

Abstract

The invention discloses a high-strength folding-resistant indoor wiring optical cable which comprises a sheath cable body, reinforcing pieces and optical fibers. The sheath cable body is made of an environment-friendly halogen free flame retardant polyolefin material with high elasticity, has the characteristics of non-toxicity, environmental protection and flame retardance and is suitable to be laid and arranged indoors. Each reinforcing piece is manufactured by a method as follows: aramid fibers are used as a matrix; after being soaked in a polyester compound solution, the matrix is put in adie opening to be extruded, stretched and dried into a rod-shaped matrix of 0.5mm, and the tensile force of the matrix reaches more than 1,800mPa; a layer of reinforcing core which has a thickness of0.2mm and is made of a high-hardness folding-resistant flame retardant PVC material with high elasticity is thermally plastic-covered on the rod-shaped matrix; and the reinforcing pieces are symmetrically integrated in the sheath cable body in parallel. One or more optical fibers can be used in the indoor wiring optical cable, and each optical fiber has a diameter of 250 micrometers and is made of an insensitive optical fiber material which is easy to bend. By combining the use of the technology, the indoor wiring optical cable with a specification of 2*3mm realizes the practical effects of high strength and folding resistance.

Description

Technical field [0001] The invention relates to an indoor wiring communication optical cable with an appearance size of 2×3MM, which is suitable for small-sized optical cables for FTTH terminal wiring. Background technique [0002] With the rapid development of society, people are increasingly dependent on communication networks and information transmission. Communication networks are developing in the direction of large capacity and high density. Therefore, certain measures should be taken to protect the optical cable and strengthen the improvement of the optical cable to ensure the long-term smooth flow and reliability of the communication network. [0003] The optical cable products currently on the market usually include two parts: the cable core and the sheath around the cable core. They often encounter two problems in use. Second, the low tensile force and poor anti-folding performance will also cause the optical fiber in the cable body to break and interrupt the tran...

AI Technical Summary

Problems solved by technology

[0003] The optical cable products currently on the market usually include two parts: the cable core and the sheath around the cable core. They often encounter two problems in use. Second, the low tensile force and poor anti-folding performance will also cause the optical fiber in the cable body to break and interrupt the transmission of information.

[0004] Since the main component of the cable core fiber is high-purity quartz glass, its physical properties of tensile and bending resistance are very fragile, so ordinary optical cables can easily break the optical fiber in the sheath during use and installation. The main obstacle to the popularization and application of optical fiber cable to the home

[0005] Similarly, the commonly used indoor 2×3MM small-size optical cable, the main component of the core fiber is also high-purity quartz glass, with a diameter of only 0.25 mm, which is as thick as human hair, and its tensile and bending resistance The physical properties are also very fragile, so it is very easy to cause fiber breakage and damage during installation

In order to overcome the above shortcomings, the industry has made a lot of efforts, including inventing an optical cable protected by an aramid reinforcing core on both sides of the optical fiber. The high-strength tensile performance of the aramid fiber in the cable body is not easy to be broken, thus protecting the optical fiber in the cable from being easily broken, but the reinforcing core has poor folding resistance. , extrusion, etc., the above-mentioned aramid fiber reinforced core still cannot effectively protect the cable core fiber

Analyze the main reason: the R angle of the optical fiber at the bending fracture is less than 1 mm, and the two parallel strengthening cores in the sheath also break when the optical cable is bent in half at a small angle. Due to the small cross-sectional size of the indoor optical cable, the cable body protection The elastic force of the sleeve is insufficient, and it cannot quickly restore the straight state, which causes the optical fiber in the cable body to break. The main function of the aramid fiber reinforcing core in the indoor wiring optical cable commonly used is to enhance the tensile force of the cable body and prevent the cable from being pulled and broken. , but its weakness is that it is easy to break and lose the elasticity of straightening when the bending radius is too small (less than 30mm)

Therefore, the existing optical cable still has the disadvantages of poor anti-folding performance even if it has the protection of the aramid fiber reinforcing core.

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