Granular filling rope material for anti-deformation cable

Abstract

The invention discloses a granular filling rope material for an anti-deformation cable. The granular filling rope material sis prepared from the following components in parts by weight: 50 parts of semi-finished product of foaming material, 50 parts of high-density polyethylene with melt flowing rate of 1.8-3.2g / 10min, and 1 part of coring master batch, wherein the melt flowing rate of the semi-finished product of foaming material is 0.65+ / -0.20g / 10min; the semi-finished product of foaming material is prepared from the following components in parts by weight: 30 parts of low-density polyethylene with melt flowing rate of 0.03-0.09g / 10min, 40 parts of high-density polyethylene with melt flowing rate of 1.8-3.2g / 10min, 30 pats of high-density polyethylene with melt flowing rate of 5-9g / 10min, and 15 parts of micrometer calcium carbonate superfine powder; the three components are uniformly mixed through a high mixing machine to obtain the granular filling rope material. The granular filling rope material has the advantages that the shape can be remained to some extent while bearing an external force, and the expansion coefficients are small; other elements at the surrounding are difficult to be deformed during forming the cable, and thus the roundness of a cable core can be ensured.

Description

technical field [0001] The invention relates to a foam filling rope granular material and a preparation process thereof, in particular to a filling rope granular material for anti-deformation cables. Background technique [0002] In recent years, the optical cable filling rope is used to fill the gap between the optical waveguide and the outer shell and between the optical waveguide and the optical waveguide to improve the roundness of the optical cable and the strength of the cable core against external force damage. The existing optical cable uses filling rope. Most of them 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 the optical fiber unit. The loose tube and other components will deform the cable core and affect the roundness of the...

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 high. 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 leaving small molecular residues in the product, affecting the mechanical properties of the product