Inflame-resistance and water-resistance filling paste for optical cable and preparation method thereof

Abstract

The invention relates to inflame-resistance and water-resistance filling paste for an optical cable, which mainly contains base oil, an oil distributing inhibitor, an antioxidant, an organic thickening agent, an inorganic thickening agent, an organic flame retardant, an inorganic flame retardant, a super absorbent and a water retardant. The invention also provides a preparation method of the inflame-resistance and water-resistance filling paste. The inflame-resistance and water-resistance filling paste for the optical cable can be used for filling the air gaps among optical cable loose tubes or filling the air gaps in the cable cores of multi-conductor electric wires and optical cables or filling the gaps among the combination of the structures and any other optical cable components so as to prevent water or other fluids flowing or transferring into the optical cables; and in addition, the inflame-resistance and water-resistance filling paste provides good actions of water resistance, high temperature resistance, inflame resistance, buffering property and the like for the optical cables so as to enhance the quality of the optical cable products.

Description

technical field [0001] The invention relates to a filling paste for optical cables and a preparation method thereof, in particular to a flame-retardant and water-resistant filling paste for optical cables and a preparation method thereof. Background technique [0002] It is well known in the optical cable industry that changes in the ambient environment can create an air pressure differential between the inside and outside of the plastic jacket tube. This often results in undirected diffusion of moisture from the outside of the fiber optic cable to the inside, which eventually leads to an undesirably high humidity inside the fiber optic cable, especially in conditions where the plastic jacket acts as the only barrier to moisture ingress . The high humidity inside the optical cable sheath will greatly damage the transmission performance of the optical cable; also, due to the damage of the optical cable, water may enter the optical cable. For example, a photoelectric lightni...

AI Technical Summary

Problems solved by technology

For example, a photoelectric lightning strike or a mechanical impact will cause a crack in the sheath of the optical cable, allowing water to enter it. If the water continues to flow along the longitudinal direction of the optical cable to the cable splicing closure, the transmission performance of the optical cable will be reduced.

[0003] In the previous production process of optical cable products, ordinary cable paste was mainly used to prevent water seepage and moisture of the optical cable. The production process of tape (intumescent) mixed use structure, the water blocking tape is used to prevent water from entering the core along the closed end of the optical cable through the sheath, generally speaking, this water blocking tape is a hierarchical structure, including Water-blocking swelling powder between two layers of polyester tape, over time, this structure often does not achieve the desired effect; especially in sea water or harsh climate environments (such as: optical cables in high temperature or burning environments ) is particularly prominent; once the optical cable is damp, watered or placed in a high temperature environment for a long time, it will directly affect the transmission performance of the optical cable

The most deadly thing is that once the optical cable is placed in a burning environment, it will completely lose its transmission performance; the water-blocking cable paste currently on the optical cable market is not only not flame retardant, but will also support combustion once it is placed in a burning environment