Water-blocking filling paste for submarine optical cable and preparation method thereof

Abstract

The invention discloses water-blocking filling paste for an undersea optical cable. The water-blocking filling paste comprises the following components, in weight percentage: 70-85% of base oil, 1-8% of oil product emulsifiers, 2-10% of oil separation inhibitors, 3-15% of hydrophilia thickeners, 8-20% of salt-tolerant temperature-resistant water-absorption expansion agents, 0.3-1% of pour-point depressants and 0.3-1% of antioxidants. The invention also provides a preparation method of the water-blocking filling paste for the undersea optical cable. The water-blocking filling paste for the undersea optical cable mainly has the characteristics of excellent salt tolerance, temperature tolerance, heat tolerance, weatherability, non-oil-separating system, fast water absorption speed in seawater, high swelling magnification, and excellent high / low temperature performance, ensures that the submarine cable does not leak in the deep sea environment, and thoroughly ensures optical fiber performance long-term stabilization and safety transmission of the submarine cable in the deep sea environment.

Description

technical field [0001] The invention relates to a water-blocking filling paste and a preparation method thereof, in particular to a water-blocking filling paste for submarine optical cables and a preparation method thereof. Background technique [0002] It is well known that changes in the surrounding environment in the optical cable industry will cause a pressure difference between the inside and outside of the plastic sheath tube, especially for submarine optical cables. This often results in undirected diffusion of moisture from the outside of the fiber optic cable to the inside, which eventually leads to undesirably high humidity inside the fiber optic cable, especially in conditions where the plastic jacket acts as the only barrier to moisture ingress . Also, due to damage to the optical cable, sea water may enter the cable. For example, human activities (such as anchoring of ships / fishing boats, etc.); natural disasters (such as earthquakes, tsunamis, hurricanes, tur...

AI Technical Summary

Problems solved by technology

Once the optical cable is damaged, seawater will enter the optical cable. If the seawater continues to flow along the longitudinal direction of the optical cable to the splicing and sealing of the optical cable without control, the transmission performance of the optical cable will be reduced; Filling with ordinary cable paste to prevent water seepage and damp of the optical cable. In the existing production process of optical cable products, there is also a production process that uses a mixed structure of filling with ordinary cable paste and wrapping or heavy wrapping water blocking tape (expansion type); However, with the passage of time, these structures often fail to achieve the expected results; due to tsunamis and earthquakes, quality transmission problems of some existing submarine optical cables often occur, resulting in the paralysis of some network information, which brings great difficulties to people's daily work. Great inconvenience, because people's daily life (mobile phone, computer, TV, network, etc.) is inseparable from optical communication

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