Manufacturing method of foam filled rope

Abstract

The invention discloses a manufacturing method of a foaming filler rope. The method includes the following steps: 30-40 parts of a low-density polyethylene, the melt flowing rate of which is 0.03-0.09g / 10min, 30-40 parts of a high-density polyethylene (A), the melt flowing rate of which is 1.8-3.2g / 10min, 30-40 parts of a high-density polyethylene (B), the melt flowing rate of which is 5-9g / 10min, and 15-20 parts of superfine calcium carbonate are placed in a highly-mixing machine for even mixing so that a mixture is formed; and a filler rope particle material is heated and fused in an extruder and nitrogen is injected in under a specific pressure at the same time and then gas is released through pressure reduction so that even foams which are closely combined with an inner layer are generated and a polyethylene foaming filler rope burial layer with a foaming capacity of 10-80% is formed. The manufacturing method of the foaming filler rope reduces adverse effects of use of a plurality of kinds of addition agents on final performance of plastic and a foaming filler rope which is manufactured through the particles is used as a burial layer which can be closely combined with a plastic thin-film external cladding layer and thus tensile strength and lateral-pressure resistance strength of the filler rope are improved.

Description

technical field [0001] The invention relates to a foam filling rope, in particular to a manufacturing method of a foam filling rope. Background technique [0002] Filling ropes are widely used in multi-waveguide optical cables. Optical cable filling ropes are a component that fills the vacancy 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 tra...

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

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