Anisotropic thermal solution

Abstract

A process is presented for forming an anisotropic graphite article, comprising forming a laminate comprising a plurality of flexible graphite sheets which comprise graphene layers; and directionally aligning the graphene layers of the laminate.

What is claimed is:  
     
         1 . A process for producing a graphite article, comprising forming a laminate comprising a plurality of flexible graphite sheets which comprise graphene layers; and directionally aligning the graphene layers of the laminate.  
     
     
         2 . The process of  claim 1  wherein directionally aligning the graphene layers of the laminate is effected by the application of pressure.  
     
     
         3 . The process of  claim 2  wherein the application of pressure is effected after the formation of the laminate from the plurality of flexible graphite sheets.  
     
     
         4 . The process of  claim 3  wherein the graphene layers of the flexible graphite sheets which make up the laminate are subjected to the application of pressure prior to the formation of the laminate, by increasing the pressure applied to the sheets during the calendering process.  
     
     
         5 . The process of  claim 2  wherein the application of pressure to the laminate results in an increase in the density of the laminate.  
     
     
         6 . The process of  claim 4  wherein the increase in the pressure during the calendering process results in the formation of flexible graphite sheets having a greater density.  
     
     
         7 . A laminate produced in accordance with the process of  claim 1 .  
     
     
         8 . A laminate produced in accordance with the process of  claim 3 .  
     
     
         9 . A laminate produced in accordance with the process of  claim 4 .  
     
     
         10 . A thermal solution comprising a plurality of flexible graphite sheets laminated into a unitary article, wherein the thermal anisotropic ratio of the article is at least about 70.  
     
     
         11 . The thermal solution of  claim 10  wherein the thermal anisotropic ratio of the article is at least about 160.  
     
     
         12 . The thermal solution of  claim 10  wherein the laminate is formed by laminating flexible sheets of compressed particles of exfoliated graphite with a suitable adhesive.  
     
     
         13 . The thermal solution of  claim 12  wherein the adhesive comprises a pressure sensitive or thermally activated adhesive.  
     
     
         14 . The thermal solution of  claim 10  which comprises a heat sink.  
     
     
         15 . The thermal solution of  claim 10  which comprises a heat spreader.