Tensile filling rope for optical cable

Abstract

The invention discloses a tensile filler rope used for an optical cable. The tensile filler rope is obtained through physical foaming of components of the following parts by weight: 50 parts of a semi-finished product of a foaming material, 50 parts of a high-density polyethylane (A) and 1 part of a nucleating master batch. The semi-finished product of the foaming material includes components of the following parts by weight: 30 parts of a low-density polyethylene, the melt flowing rate of which is 0.03-0.09g / 10min, 40 parts of the high-density polyethylene (A), the melt flowing rate of which is 1.8-3.2g / 10min, 30 parts of a high-density polyethylene (B), the melt flowing rate of which is 5-9g / 10min, and 15 parts of micrometer superfine calcium carbonate. The manufactured tensile filler rope is used as a burial layer which can be closely combined with a plastic thin-film external cladding layer so that the tensile strength and lateral pressure resisting strength of the filler rope are improved.

Description

technical field [0001] The invention relates to a filling rope, in particular to a tensile filling rope for an optical cable. Background technique [0002] Optical cable filling rope is a component that fills the space in the cable core to keep it round during the stranding process. Most of the existing filling ropes for optical cables are solid ropes extruded from high-density insulating materials. Due to their high hardness, when they are co-wound with other components to form a cable core, they will be subjected to a large extrusion force in the machine, which limits high-speed production. And it is easy to squeeze other components such as the loose tube of the optical fiber unit, deform the cable core, and affect the roundness of the optical cable. Secondly, the raw material consumption of the solid rope is large, the manufacturing cost is high, and its own weight is large, resulting in high transportation cost of the optical cable. In addition, the solid rope has high...

AI Technical Summary

Problems solved by technology

Disclosed as CN101382626A is a kind of invention patent of "optical cable foaming filling rope granular material and production method thereof", the raw material of filling rope granular material in this patented technology has low-density polyethylene, high-density polyethylene, polypropylene, polyethylene wax, Stearic acid, calcium stearate and tetraerythritol fat, etc., have many components and large difference in proportion, which is troublesome to weigh, difficult to disperse, and difficult to mix evenly; and because the unit price of each component is relatively expensive, the manufacturing cost is still Quite stressful; in addition, the addition and use of various additives is likely to have a negative impact on the final performance of the product, resulting in uneven distribution of air bubbles inside the product, and will leave small molecular residues in the product, affecting the mechanical properties of the product