Abstract: A fiber-reinforced rigid polyurethane foam composite railway sleeper with high fiber content and a manufacturing method thereof. The railway sleeper is formed by bonding a plurality of fiber-reinforced rigid polyurethane foam composite boards with high fiber content by a binder, and the outer surface of the railway sleeper is provided with an anticorrosive paint film. The fiber-reinforced rigid polyurethane foam composite boards with high fiber content include a polyurethane resin as a matrix material and a fiber as a reinforcing material. 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 a fiber-reinforced rigid polyurethane foam composite product having a density higher than 840 kg/m3 and a fiber content greater than 60% is manufactured.
Type:
Grant
Filed:
August 14, 2017
Date of Patent:
January 21, 2020
Assignees:
RAILWAY ENGINEERING RESEARCH INSTITUTE OF CHINA ACADEMY OF RAILWAY SCIENCES CORPORATION LIMITED, CHINA ACADEMY OF RAILWAY SCIENCES CORPORATION LIMITED
Inventors:
Bin Niu, Zhibin Zeng, Yonghua Su, Tibo Zhao
Abstract: A fiber-reinforced rigid polyurethane foam composite railway sleeper with high fiber content and a manufacturing method thereof. The railway sleeper is formed by bonding a plurality of fiber-reinforced rigid polyurethane foam composite boards with high fiber content by a binder, and the outer surface of the railway sleeper is provided with an anticorrosive paint film. The fiber-reinforced rigid polyurethane foam composite boards with high fiber content include a polyurethane resin as a matrix material and a fiber as a reinforcing material. 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 a fiber-reinforced rigid polyurethane foam composite product having a density higher than 840 kg/m3 and a fiber content greater than 60% is manufactured.
Type:
Application
Filed:
August 14, 2017
Publication date:
June 20, 2019
Applicants:
RAILWAY ENGINEERING RESEARCH INSTITUTE OF CHINA ACADEMY OF RAILWAY SCIENCES CORPORATION LIMITED, CHINA ACADEMY OF RAILWAY SCIENCES COPORATION LIMITED
Inventors:
Bin NIU, Zhibin ZENG, Yonghua SU, Tibo ZHAO