Holder for polished work, and laminate plate used for same

Abstract

The invention provides a holder for a polished work in which the warpage suppression or plate thickness accuracy of the holder for a polished work is improved, the generation of scratches in a polished work is suppressed so as to improve the abrasion resistance, and furthermore, economic advantages are provided. The holder for a polished work of the invention includes a first resin layer produced by impregnating a first resin composition into a first fiber base material, and heating and pressurizing the first fiber base material as an outermost layer, the first fiber base material is a glass fiber base material, and a structure derived from a resin having a novolac skeleton is included in a proportion of 50 mass % or more in the first resin layer excluding the first fiber base material.

1 . A holder for a polished work, comprising:
 a first resin layer produced by impregnating a first resin composition into a first fiber base material, and heating and pressurizing the first fiber base material as an outermost layer,   wherein the first fiber base material is a glass fiber base material, and   a structure derived from a resin having a novolac skeleton is included in a proportion of 50 mass % or more in the first resin layer excluding the first fiber base material.   
     
     
         2 . The holder for a polished work according to  claim 1 ,
 wherein the first fiber base material is included in a proportion in a range of 25 mass % to 60 mass % in the first resin layer.   
     
     
         3 . The holder for a polished work according to  claim 1 ,
 wherein the first fiber base material is made of a glass fiber fabric having a weight per area in a range of 30 g/m 2  to 150 g/m 2 .   
     
     
         4 . The holder for a polished work according to  claim 1 ,
 wherein the first resin composition contains one or more resins selected from a novolac-type epoxy resin and a novolac-type phenol resin.   
     
     
         5 . The holder for a polished work according to  claim 1 ,
 wherein the first resin composition contains the novolac-type epoxy resin in a proportion in a range of 40 parts by mass to 80 parts by mass in 100 parts by mass of the composition.   
     
     
         6 . The holder for a polished work according to  claim 1 ,
 wherein the first resin composition contains the novolac-type phenol resin in a proportion in a range of 20 parts by mass to 40 parts by mass in 100 parts by mass of the composition.   
     
     
         7 . The holder for a polished work according to  claim 1 ,
 wherein the first resin composition further contains a bisphenol A-type epoxy resin in a proportion in a range of 5 parts by mass to 40 parts by mass in 100 parts by mass of the composition.   
     
     
         8 . The holder for a polished work according to  claim 1 , further comprising:
 one or more second resin layers produced by impregnating a second resin composition into a second fiber base material, and heating and pressurizing the second fiber base material as an inside layer,   wherein the second fiber base material is a glass fiber base material.   
     
     
         9 . The holder for a polished work according to  claim 8 ,
 wherein the second fiber base material is made of a glass fiber fabric having a weight per area in a range of 100 g/m 2  to 220 g/m 2 .   
     
     
         10 . A laminate plate used for the holder for a polished work according to  claim 1 .