Adhesive for physical foaming of communication cable

Abstract

The invention provides an adhesive for physical foaming of a communication cable, comprising the following components: a low-density PE, a copolymer HA-1 and a copper corrosion inhibitor BTA, wherein, the mass ratio is 80:1:0.8. The production process comprises the following steps: (1) selecting materials: taking the low-density LDPE, the copolymer HA-1 and the copper corrosion inhibitor BTA as raw materials; (2) proportioning materials: weighing and proportioning the low-density LDPE, the copolymer HA-1 and the copper corrosion inhibitor BTA based on the mass ratio of 80:1:0.8; (3) mixing materials: sequentially adding the weighed materials into a high-speed mixer to fully and evenly mix; and (4) extruding and cutting: adding the mixed materials into an extruder through a feeding openingthereof, plasticizing and mixing by a screw stem of the extruder, cooling by circulating water, and then cutting into granules. The method helps effectively improve adhesion between a conductor and an insulating layer by reasonably selecting and proportioning the materials such as the low-density LDPE, the copolymer HA-1 and the copper corrosion inhibitor BTA and then taking the mixed anticorrosion adhesive as a glue coating layer; and the conductor need not to be preheated by a preheater, thus preventing the conductor to generate cyclical fluctuation and guaranteeing the performance index ofproducts. The glue coating layer can ensure adhesion between the conductor and the insulating layer, has an anticorrosion function to the copper conductor, stabilizes the performance index of the cable and prolongs the service life of the cable.

Description

technical field [0001] The invention relates to the field of cable materials, in particular to an adhesive used for physical foaming of communication cables. Background technique [0002] At present, in the traditional physical foaming production process of communication cables, a solid layer of PE is coated between the conductor and the insulating layer to ensure a certain bonding force between the conductor and the insulating layer. Due to the low adhesion of PE, it is usually uniform. At the same time, it is supplemented by preheating the conductor wire to improve the adhesion. The disadvantage of this method is that the conductor is prone to periodic tension fluctuations during the bending and heating process in the multi-pass wheel of the preheater, which will seriously affect the important performance indicators of the product, the return loss value, and the PE material has no corrosion resistance to copper conductors The function of the cable, the moisture in the ext...

AI Technical Summary

Problems solved by technology

[0003] The invention provides an adhesive for physical foaming of communication cables, which solves the disadvantages of PE in the background technology, such as low adhesion, easy moisture intrusion from the conductor and the insulating layer, and influence on cable performance indicators.