Longitudinal watertight tight-buffered fiber and preparation method thereof

Abstract

The invention relates to a longitudinal watertight tight-buffered fiber and a preparation method thereof. The longitudinal watertight tight-buffered fiber comprises a fiber body, wherein the fiber body is packaged by a waterproof layer; and the waterproof layer is packaged by a tight-buffering layer. In a preparation period, steps of paying off a fiber, coating a bare fiber, carrying out drying, carrying out extrusion tight-buffering and carrying out cooling are carried out to obtain a finished product. Independent organic silicon gel is taken as an intermediate medium. Bonding and buffering effect between the bare fiber and the tight-buffered layer is realized, and a longitudinal watertight effect is achieved. Integral construction is simple. Preparation is convenient. An application requirement for longitudinal watertight performance of 10MPa and a water depth of 1000m is satisfied.

Description

technical field [0001] The invention relates to a preparation method, in particular to a longitudinal watertight tightly wrapped optical fiber and a preparation method thereof. Background technique [0002] Composite cable is suitable for broadband access network system as a transmission line. It is a new type of access method, which integrates optical fiber and power transmission copper wire, and can solve the problems of broadband access, equipment power consumption, and signal transmission. [0003] However, the existing composite cables are only suitable for use in conventional environments. For laying on the seabed, they often fail to achieve the corresponding compression resistance, and are prone to water leakage and damage. [0004] At the same time, combined with the existing technology patent No. 201711381271.6 a longitudinal watertight cable, patent No. 201720990870.7 a longitudinal watertight cable, patent 201921767088.x a longitudinal watertight cable, patent 201...

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Problems solved by technology

[0003] However, the existing composite cables are only suitable for use in conventional environments. For laying on the seabed, they often fail to achieve the corresponding compression resistance, and are prone to water leakage and damage.

[0004] At the same time, combined with the existing technology patent No. 201711381271.6 a longitudinal watertight cable, patent No. 201720990870.7 a longitudinal watertight cable, patent 201921767088.x a longitudinal watertight cable, patent 201810401254.2 a low-smoke, low-toxicity and large-depth bus watertight coaxial cable , patent 200510023498.7 longitudinal water-sealed cable / wire, patent No. 201811385961.3 a longitudinal watertight stream photoelectric composite cable and its production method, it provides a variety of structures suitable for cables, but cannot meet the needs of effective watertight use

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