| 摘要 |
A method of producing a thermoplastic road-marking composition comprises mixing an opaque pigment, a translucent particulate thermoplastic material and reflective glass beads such that when the thermoplastic material is subsequently melted to bind the composition and the composition is laid as a marking, the glass beads on the visible surface of the markings are not substantially obscured by the opaque pigment. Also disclosed is a thermoplastic road-marking composition comprising a mixture of a particulate filler material, a pigment, a translucent thermoplastic material and reflective glass beads; wherein the pigment clings to the filler material and the reflective glass beads being generally clear of the pigment. Accordingly, the thermoplastic road-marking immediately has retroreflectivity without the requirement for an additional operation of adding glass beads to the surface of the marking and without the need to let the road-marking wear before it becomes retroreflective. |
