Electrically insulating resin composition and laminate sheet

Abstract

The present invention provides an electrically insulating resin composition including a polysulfone resin including a plurality of sulfonyl groups in the molecule and a polyamide resin, wherein the proportion of the polyamide resin is 1 to 45% by mass. The present invention also provides a laminate sheet obtained by bonding a plurality of sheet materials with a resin composition layer interposed therebetween, wherein the resin composition layer includes a polysulfone resin including a plurality of sulfonyl groups in the molecule and a polyamide resin, and the proportion of the polyamide resin is 1 to 45% by mass.

1 . An electrically insulating resin composition, comprising a polysulfone resin including a plurality of sulfonyl groups in a molecule and a polyamide resin, wherein a proportion of the polyamide resin is 1 to 45% by mass. 
     
     
         2 . The electrically insulating resin composition according to  claim 1 , wherein the polysulfone resin is a polyether sulfone resin further including a plurality of ether bonds in a molecule, or a polyphenylsulfone resin further including a plurality of aromatic hydrocarbons in the molecule. 
     
     
         3 . The electrically insulating resin composition according to  claim 1 , wherein the polyamide resin contains an aromatic hydrocarbon. 
     
     
         4 . The electrically insulating resin composition according to  claim 1 , wherein the electrically insulating resin composition has a CTI value of not less than 130 V in a tracking resistance test. 
     
     
         5 . The electrically insulating resin composition according to  claim 1 , wherein a tear resistance value is not less than 20 MPa. 
     
     
         6 . The electrically insulating resin composition according to  claim 1 , wherein a strength retention of tensile strength after 250 hours have passed at 240° C. is not less than 55%. 
     
     
         7 . The electrically insulating resin composition according to  claim 1 , wherein the electrically insulating resin composition is formed into a sheet-like shape. 
     
     
         8 . The electrically insulating resin composition according to  claim 1 , wherein the electrically insulating resin composition is used in application of electrical insulation. 
     
     
         9 . A laminate sheet obtained by bonding a plurality of sheet materials with a resin composition layer interposed between the sheet materials, wherein the resin composition layer comprises a polysulfone resin including a plurality of sulfonyl groups in a molecule and a polyamide resin, and the proportion of the polyamide resin is 1 to 45% by mass. 
     
     
         10 . The laminate sheet according to  claim 9 , wherein the sheet material contains a wholly aromatic polyamide. 
     
     
         11 . The laminate sheet according to  claim 9 , wherein the sheet material is paper produced by a wet papermaking method. 
     
     
         12 . The laminate sheet according to  claim 9 , wherein the sheet material is a wholly aromatic polyamide paper comprising a wholly aromatic polyamide fiber. 
     
     
         13 . The laminate sheet according to  claim 9 , wherein the sheet material is a non-woven fabric. 
     
     
         14 . The laminate sheet according to  claim 9 , wherein at least a surface of the sheet material on a side of the resin composition layer is subjected to a corona treatment. 
     
     
         15 . The laminate sheet according to  claim 9 , wherein the polysulfone resin is a polyether sulfone resin further including a plurality of ether bonds in the molecule. 
     
     
         16 . (canceled) 
     
     
         17 . The laminate sheet according to  claim 9 , wherein the polyamide resin is a polyamide resin having an aromatic hydrocarbon in the molecule. 
     
     
         18 . The laminate sheet according to  claim 9 , further comprising a sheet-like pressure-sensitive adhesive layer having pressure-sensitive adhesiveness, wherein the pressure-sensitive adhesive layer is disposed on at least one of topmost surfaces of the laminate sheet. 
     
     
         19 . The laminate sheet according to  claim 18 , wherein the pressure-sensitive adhesive layer has flame retardancy that meets a UL94 VTM-0 standard. 
     
     
         20 . The laminate sheet according to  claim 9 , wherein the laminate sheet is configured such that the sheet material is disposed contacting both surfaces of the resin composition layer, and an interlayer adhesive force between the resin composition layer and the sheet material is larger than a cohesive failure force of the resin composition layer and that of the sheet material. 
     
     
         21 . The laminate sheet according to  claim 9 , wherein a strength retention of tensile strength after 250 hours have passed at 240° C. is not less than 50%. 
     
     
         22 . The laminate sheet according to  claim 9 , wherein the sheet laminate is used in application of electrical insulation.