Novel light-weight high-strength low-density optical cable sheathing material and preparation method thereof

Abstract

The invention relates to the technical field of optical cable sheathes, and particularly relates to an optical cable sheathing material and a preparation method thereof. The optical cable sheathing material is prepared from PE (Polyethylene), carbon black, thermal expansion microspheres or hollow glass microspheres, antioxidants and white oil. The preparation method comprises the steps of adding the raw materials to a mixing device according to an adding proportion, performing primary mixing and homogenization, then adding to an extruding machine, forming a homogeneous polymer / gas system by the thermal expansion microspheres or the hollow glass microspheres and PE polymers under the combined action of a shear mixing field and the processing temperature in a machine barrel, then conveying to a machine head, extruding, then cooling, dicing and drying, so as to obtain sheathing material granules of microcellular structures. By utilizing the characteristics of light weight, high strength and low density, the cost of a traditional optical cable sheathing material can be greatly reduced, obtained microcellular plastics have stable foaming properties and microcellular sizes, the process is simple, the manufacturing is easy, and industrial utilization is satisfied.

Description

technical field [0001] The invention relates to the technical field of optical cable sheaths, in particular to an optical cable sheath material and a preparation method thereof. Background technique [0002] MDPE is medium-density polyethylene plastic, which is the main raw material used in the production of optical cable sheaths. It is used in a large amount, but its density is high, the amount used in production is large, and the cost is high; and its strength is lower than engineering plastics. With the shrinking of oil and gas resources and the long-term rise in world oil prices, the unit cost of PE materials will inevitably increase. [0003] The preparation of microporous plastics is one of the fastest-growing fields of polymer materials. The so-called microporous plastics refer to the bubbles with a diameter of 1-10 μm and a cell density of 10 μm. 9 ~10 15 piece / cm 3 new foam plastics. When the size of the cell in the foam is smaller than the crack of the material...

AI Technical Summary

Problems solved by technology

However, most of the current microporous materials are prepared by extrusion and injection of high-pressure gas. The control of both the size and number of bubbles is very unstable, which has become a problem that plagues the large-scale application of this technology.