Modified composite core rod and manufacturing method thereof

Abstract

The invention discloses a modified composite core rod and a manufacturing method thereof. The composite core rod comprises an inner fiber core, an outer fiber layer wound or / and braided or / and longitudinally wrapped outside the inner core, and thermosetting or thermoplastic high temperature-resistant resin uniformly embedded into the inner fiber core and the outer fiber layer. The inner fiber core is composed of a plurality of longitudinal fibers, and the outer diameter is 5.0-11.0mm. The outer fiber layer includes at least two layers. The inner fiber core and the outer fiber layer are cured by the resin to form an integral body. The outer diameter of the composite core rod is 10.0-20.0mm. The Tg of the high temperature-resistant resin is higher than or equal to 90 DEG C, and the volume fraction of the resin is 25-40%. The invention mainly provides a solution for the problem that a conventional fiber-reinforced resin-based composite core rod has low tensile strength and poor bending performance and the cross section of the composite core rod cannot be too large. The bending performance of the composite core rod is improved, the specification range of the composite core rod is expanded, and the tensile strength of the composite core rod is improved. The composite core rod can meet the requirements of transmission lines in harsh environments such as large-span areas and strong-wind areas.

Description

technical field [0001] The invention discloses a modified composite mandrel and a manufacturing method thereof, and provides a modified fiber-reinforced resin-based composite mandrel with large cross-section, high breaking force, good bending performance, and no longitudinal and radial cracking and its manufacture method. Background technique [0002] Resin-based high-strength continuous fiber composite wire, because of its light weight, high tensile strength, high temperature resistance, high specific modulus, and small linear expansion coefficient, should be used in power transmission, marine operations, and bridge reinforcement. widespread attention of the people. In particular, many companies headed by American CTC Company and Far East Composite Technology Co., Ltd. have increasingly highlighted the advantages of using composite materials in power transmission lines. The composite core is mainly composed of multiple longitudinal fibers cured by resin. This structure ha...

AI Technical Summary

Problems solved by technology

Such as the stranded composite core, however, the stranded composite core has complex manufacturing process, difficulty in achieving uniform tension of each strand, and complex connection fittings. Up to now, there is still no mature manufacturing method for mass production of stranded composite mandrels.

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