Temporary marking material and pavement marker

Abstract

A temporary marking material comprises a thermally-expansible layer containing a binder, a pigment and thermally-expansible microballs, and a pavement marker comprises the temporary marking material. Both the temporary marking material and the pavement maker hardly peel off or move during the use, and when they become unnecessary, they can be easily peeled off by heating from the structure in a short time by virtue of the expanded microballs. When the temporary marking material is in practical use, the thermally-expansible layer is disposed on the surface of a structure. The pavement marker is disposed on the pavement as part of a surface of the structure.

1 . A temporary marking material comprising 
 a thermally-expansible layer containing a binder,    a pigment, and    thermally-expansible microballs,    wherein said thermally-expansible layer is adhered to surface of a structure for use by virtue of the binder contained in the thermally-expansible layer.    
   
   
       2 . A temporary marking material according to  claim 1 , 
 wherein the thermally-expansible microballs are expandable at a predetermined temperature or higher, and expanded thermally-expansible microballs makes thermally-expansible layer expanded; and    wherein the temporary marking material becomes peelable from surface of said structure due to expansion of the thermally-expansible layer caused by expanded thermally-expansible microballs when heated at said predetermined temperature or higher while the temporary marking material is adhered to the surface of the structure at a temperature of working atmosphere.    
   
   
       3 . A temporary marking material according to  claim 2 , 
 wherein the thermally-expansible microballs have an expandability of at least 10 times in term of volume, compared with the volume thereof at temperature of working atmosphere.    
   
   
       4 . A temporary marking material according to  claim 1 , 
 wherein the marking material further comprises a bead layer containing transparent beads; said bead layer being provided on a side of the thermally-expansible layer opposite to a side which contacts with the structure.    
   
   
       5 . A pavement marker comprising a temporary marking material which comprises 
 a thermally-expansible layer containing a binder,    a pigment and    thermally-expansible microballs,    wherein the pavement marker is disposed, for use, on a pavement as a surface of the structure by virtue of the binder contained in the thermally-expansible layer.    
   
   
       6 . A pavement marker according to  claim 5 , 
 wherein the thermally-expansible microballs are expandable at a predetermined temperature or higher, and expanded thermally-expansible microballs makes thermally-expansible layer expanded; and    wherein the temporary marking material becomes peelable from surface of said structure due to expansion of the thermally-expansible layer caused by expanded thermally-expansible microballs when heated at said predetermined temperature or higher while the temporary marking material is adhered to the surface of the structure at a temperature of working atmosphere.    
   
   
       7 . A pavement marker according to  claim 5 , 
 wherein the thermally-expansible microballs have an expandability of at least 10 times in term of volume, compared with the volume thereof at temperature of working atmosphere.    
   
   
       8 . A pavement marker according to  claim 5 , 
 wherein the marking material further comprises a bead layer containing transparent beads; said bead layer being provided on a side of the thermally-expansible layer opposite to a side which contacts with the structure.