Reinforced core and optical cable using the reinforced core

Abstract

The invention discloses a special high-hardness anti-tortuous optical cable strengthening core and an optical cable using the strengthening core; the optical cable comprises a sheathed cable body, a strengthening piece and optical fibers; the sheathed cable body made of environmentally friendly halogen-free flame retardant high-elastic polyolefin materials has non-toxic environmentally friendly flame-retardant properties and can be applied to indoor laying; the strengthening piece takes aramid fibers as matrix material which then enters a die hole after being impregnated into the ultra-violet composite liquid, finally the material is extruded, stretched and solidified through UV into 0.5mm rod-shaped matrix, with the tensile force reaching more than 1800MPa; a layer of 0.2mm high-hardness bending-resistant and flame-retardant PVC high-elastic material is arranged on the rod-shaped matrix through plastic coating; the layer of material is integrated into the sheathed cable body in a parallel and symmetrical way; the fibers can be one or more in number, with a diameter of 250um; the fibers are made of easily tortuous and insensitive fiber materials; therefore, through the combination of the processes and technologies, the indoor wiring optical cable with the specification of 2 multiplying 3mm achieves high-hardness and anti-tortuous practical effects.

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-mentioned shortcomings, the industry has made a lot of efforts, including inventing an optical cable protected by an aramid reinforcing core that is currently on the market instead of glass fibers on both sides of the optical fiber. A fiber-reinforced plastic rod body is made of aramid fiber as a reinforcing material, a thermosetting resin as a matrix material, and thermoplastic PE as a sheath material, such as Chinese patent CN200410017783.0, and its aramid fiber optic cable reinforcement core adopts the above-mentioned structure, and its diameter is about 0.5MM -0.8MM, the aramid fiber cable strengthening core can improve the overall tensile strength of the cable to a certain extent, ensuring that the cable is not easily broken due to the high tensile performance of the aramid fiber in the cable body during construction and use, thereby protecting The optical fiber in the optical cable is not easy to be broken, but the bending resistance of the aramid fiber optic cable reinforcement core is poor. When encountering knotting, bending, extrusion, etc. during construction, the above aramid fiber reinforcement core is still not effective. Optical fiber in the protective cable body

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 aramid optical cable reinforced core protected optical cable has disadvantages such as poor bending resistance, small bending angle and easy breakage.

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