HIGH-FIBER-CONTENT FIBER-REINFORCED RIGID POLYURETHANE FOAM COMPOSITE RAILWAY SLEEPER AND METHOD FOR MANUFACTURING SAME

摘要

A fiber-reinforced rigid polyurethane foam composite railway sleeper with high fiber content and a manufacturing method thereof are disclosed. The railway sleeper is formed by bonding a plurality of fiber-reinforced rigid polyurethane foam composite boards with high fiber content (10) by a binder (11), and the outer surface of the railway sleeper is provided with an anticorrosive paint film (12). The fiber-reinforced rigid polyurethane foam composite boards with high fiber content (10) include a polyurethane resin as a matrix material and a fiber as a reinforcing material. In the present invention, the problem of insufficient impregnation of the polyurethane and the fiber is solved by using a plurality of technical means such as using a mixed polyether polyol having a low hydroxyl value and a low functionality, using a coupling agent, etc., thus the fiber content is increased and a fiber-reinforced rigid polyurethane foam composite product having a density higher than 840 kg/mand a fiber content greater than 60% is capable of being manufactured, which fills in the technical gap of fiber-reinforced rigid polyurethane foam composite railway sleepers and makes a diversification of the product specifications and performance to meet various technical requirements.