High-durability pavement marking sheet material

摘要

A pavement marking sheet material of an improved durability comprises a laminate of a base layer containing unvulcanized synthetic rubber as a main ingredient and a colored layer of unvulcanized synthetic rubber containing a coloring agent and glass microspheres dispersed over the suface of the colored layer. The lower portions of the microspheres are embedded in the base layer and the remaining surfaces of the microspheres and the surface of the laminate are covered integrally with a surface layer of a thin film consisting of a transparent and colorless synthetic resin. The glass microspheres are prevented from coming off by the cooperation between the three layers and wear of the sheet itself is substantially reduced.