Heat radiation sheet and method of manufacturing same

Abstract

A heat radiation sheet including: a heat radiation layer that is formed in the form of a nano-web having a plurality of pores by electrospinning a spinning solution that is obtained by mixing a polymer material and a solvent, or the polymer material, a heat conductive material, and the solvent; and an adhesive layer that is laminated on one surface or both surfaces of the heat radiation layer, and that is formed in the form of the nano-web by electrospinning an adhesive material that is obtained by an adhesive, the heat conductive material, and the solvent.

What is claimed is: 
     
         1 . A heat radiation sheet comprising:
 a heat radiation layer that is formed in the form of a nano-web having a plurality of pores by electrospinning a spinning solution that is obtained by mixing a polymer material and a solvent, or the polymer material, a heat conductive material, and the solvent; and   an adhesive layer that is laminated on one surface or both surfaces of the heat radiation layer, and that is formed in the form of the nano-web by electrospinning an adhesive material that is obtained by an adhesive, the heat conductive material, and the solvent.   
     
     
         2 . The heat radiation sheet of  claim 1 , wherein the heat conductive material employs any one selected from a heat conductive metal having excellent thermal conductivity, conductive carbon, carbon black, carbon nanotube (CNT), and conductive polymer (PDOT). 
     
     
         3 . The heat radiation sheet of  claim 1 , wherein the heat conductive material is heat conductive particles and part of the heat conductive particles are exposed on the surface of nanofibers of webs of the heat radiation layer and the adhesive layer. 
     
     
         4 . The heat radiation sheet of  claim 1 , wherein the adhesive layer is in contact with and adhered on a heat generating component of electronic equipment. 
     
     
         5 . The heat radiation sheet of  claim 1 , wherein heat conductive particles are dispersed between the heat radiation layer and the adhesive layer. 
     
     
         6 . A heat radiation sheet comprising:
 a substrate that is formed in the form of a web by an electrospinning method;   an adhesive layer that is laminated on one surface of the substrate; and   a metal layer that is coated on the other surface of the substrate and having thermal conductivity.   
     
     
         7 . The heat radiation sheet of  claim 6 , wherein the substrate has a web structure having a plurality of pores that are formed by electrospinning a spinning solution that is obtained by mixing a polymer material and a solvent, or the polymer material, a heat conductive material, and the solvent, and the adhesive layer that is formed in the form of the web by electrospinning an adhesive material that is obtained by an adhesive, the heat conductive material, and the solvent. 
     
     
         8 . The heat radiation sheet of  claim 6 , wherein the metal layer is a metal pattern layer that is coated in a pattern shape on the other surface of the substrate. 
     
     
         9 . A method of manufacturing a heat radiation sheet comprising the steps of:
 forming an adhesive layer that is formed in the form of a nano-web by electrospinning an adhesive material that is obtained by an adhesive, a heat conductive material, and a solvent; and   forming a heat radiation layer that is formed on one surface of the adhesive layer, and that is formed in the form of a web by electrospinning a spinning solution that is obtained by mixing a polymer material and a solvent, or the polymer material, the heat conductive material, and the solvent.   
     
     
         10 . The method of manufacturing the heat radiation sheet of  claim 9 , further comprising electrospinning a spinning solution that is obtained by mixing heat conductive particles and the solvent, to thus dispersing the heat conductive particles on the web of the adhesive layer, between the step of forming the adhesive layer in the web form and the step of forming the heat radiation layer in the web form. 
     
     
         11 . The method of manufacturing the heat radiation sheet of  claim 9 , further comprising pressurizing the adhesive layer and the heat radiation layer after forming the heat radiation layer in the web form.