Water-blocking filling paste for optical cable

Abstract

The invention relates to a water-blocking filling paste for an optical cable, which mainly comprises the following components: base oil, an oil separation inhibitor, a thickening agent, a super absorbent, a water blocking agent, a dispersant, an antioxidant and a pour depressant, and has the characteristics of temperature resistance, salt water resistance, and ultra strong water absorption power.

Description

technical field [0001] The invention relates to a water-blocking mixture, in particular to a water-blocking filling paste for optical cables. 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 undesirably high humidity inside the fiber optic cable, especially in conditions where the plastic jacket acts as the only barrier to moisture ingress . High humidity inside the optical cable sheath may have a detrimental effect on the transmission characteristics of the optical cable. [0003] Also, water may enter the optical cable due to damage to the optical cable. For example, light or mechanical impact can cause cracks in the sheath of the optical cable, allowing water to enter i...

AI Technical Summary

Problems solved by technology

[0004] In the existing technology, many commercially available optical cables also include a water blocking tape (intumescent type), which is used to prevent water from entering the core along the closed end of the optical cable through the sheath, generally Said that this water-blocking tape is a layered structure, including water-blocking swelling powder between two layers of polyester tape, and this structure often does not achieve the desired effect over time