Optical cable with high-hardness protective layer

Abstract

The invention discloses an optical cable with a high-hardness protective layer. The optical cable comprises a loose bushing, a protective layer arranged outside the loose bushing, an internal protective layer arranged outside the protective layer and an external sheath arranged outside the internal protective layer. The loose bushing is internally provided with at least one optical fiber. The high-hardness protective layer is arranged between the internal protective layer and the external sheath. The high-hardness protective layer is composed of raw materials with the following parts by weight: 25-30 parts of organic silicone rubber, 5-10 parts of high molecular weight polyisobutylene; 5-10 parts of medium molecular weight polyisobutylene; 10-15 parts of low molecular weight polyisobutylene; 10-15 parts of inorganic filling material; 0.5-1 part of anti-oxidant; 70-80 parts of ultrafine steel fiber; 70-80 parts of glass fiber; 5-10 parts of silicate; 10-20 parts of fine sand of which the diameter is 0.1mm-0.25mm; 10-20 parts of epoxy resin; 10-20 parts of aluminum hydroxide; and 10-20 parts of hot-melt adhesive.

Description

technical field [0001] The invention relates to an optical cable structure, in particular to an optical cable with a strong protective layer. Background technique [0002] Optical cable is a light transmission tool that achieves the principle of total reflection of light in fibers made of glass or plastic. An optical cable is a communication line in which a certain number of optical fibers form a cable core in a certain way, and is covered with a sheath, and some are also covered with an outer sheath to realize optical signal transmission. In the prior art, the optical fiber is arranged in the loose tube, and at the same time, fiber paste is added to the loose tube. The fiber paste is indispensable in the production of central tube type and layer-stranded optical cables, and plays a role of sealing, stress resistance and buffering function, but it does not have the effect of heat insulation; in the prior art, in order to combine the optical fiber and the transmission li...

AI Technical Summary

Problems solved by technology

In the prior art, the optical fiber is arranged in the loose tube, and at the same time, fiber paste must be added to the loose tube. The fiber paste is indispensable in the production of the central tube type and layer-stranded optical cable, and plays a role of sealing, stress resistance and buffering. function, but it does not have the effect of heat insulation; in the prior art, in order to combine the optical fiber and the transmission line, the market has begun to develop the optical fiber transmission cable, which combines the optical cable and the transmission cable, but because the electric wire in the transmission cable is in the In the process of transmitting current, it is necessary to overcome its own resistance and generate a lot of heat, so the heat will affect the transmission performance of the optical fiber, so the existing power transmission optical cables need to overcome the above important problems; at the same time, these lines are easily bitten by animals in the wild environment , so it is necessary for the optical cable to have a strong hardness protective layer to prevent animals from biting