| abstract |
This invention makes it a subject to provide the molded object for rail laying of the polyurethane resin excellent in the damping effect.n n n The rail laying molded body 1 of the present invention has a polyurethane resin portion 10 and a fiber portion 23 obtained by reacting a polyol and an isocyanate, and the fiber laying portion 23 is contained in the rail laying molded body 1. It is. The polyol has a hydroxyl value of 80 to 350 mgKOH / g, a functional group number of 2.0 to 3.5, and a mixing ratio of polyol and isocyanate of 1: 1.1 to 1: 0.4. Accordingly, the polyurethane resin portion 10 is soft to an appropriate degree and has vibration damping property, is hard to an appropriate degree, and has strength and durability. |