Prepreg, laminate, and method of production of prepreg

Abstract

A prepreg provided with a first resin layer and a second resin layer which is formed on this first resin layer, wherein the first resin layer is formed by a first resin composition, the second resin layer is a layer which comprises a resin layer which is formed by a second resin composition which is different from the first resin composition and in which a fiber base material is contained, the second resin layer is provided with a fiber base material-containing layer which contains the fiber base material, an A layer which is positioned at an opposite side of the first resin layer side of the fiber base material-containing layer and which does not contain the fiber base material, and a B layer which is positioned at the first resin layer side of the fiber base material-containing layer and which does not contain the fiber base material, and said B layer has a thickness which is smaller than the thickness of the first resin layer, is provided.

1 . A method of production of the prepreg provided with a first resin layer and a second resin layer which is formed on the first resin layer, wherein:
 said first resin layer is formed by a first resin composition,   said second resin layer is a layer which comprises a resin layer which is formed by a second resin composition which is different from said first resin composition and in which a fiber base material is contained,   said second resin layer is provided with a fiber base material-containing layer which contains said fiber base material, an A layer which is positioned at an opposite side of said first resin layer side of said fiber base material-containing layer and which does not contain said fiber base material, and a B layer which is positioned at said first resin layer side of said fiber base material-containing layer and which does not contain said fiber base material,   said B layer has a thickness of over 0 μm to 2 μm, and   said B layer has a thickness which is smaller than the thickness of said first resin layer, the method comprising:   a step A of using said first resin composition to form said first resin layer,   a step B of superposing said fiber base material on said first resin layer, and   a step C of impregnating said second resin composition in said fiber base material after said step B, where,   when impregnating said second resin composition in said fiber base material in said step C, the B layer is formed between said fiber base material and said first resin layer.   
     
     
         2 . The method of production of the prepreg as set forth in  claim 1  further comprising, before superposing said fiber base material on said first resin layer, forming the B layer comprised of said second resin composition on said first resin layer and superposing said fiber base material through the B layer. 
     
     
         3 . A method of production of the prepreg provided with a first resin layer and a second resin layer which is formed on the first resin layer, wherein:
 said first resin layer is formed by a first resin composition,   said second resin layer is a layer which comprises a resin layer which is formed by a second resin composition which is different from said first resin composition and in which a fiber base material is contained,   said second resin layer is provided with a fiber base material-containing layer which contains said fiber base material, an A layer which is positioned at an opposite side of said first resin layer side of said fiber base material-containing layer and which does not contain said fiber base material, and a B layer which is positioned at said first resin layer side of said fiber base material-containing layer and which does not contain said fiber base material,   said B layer has a thickness of over 0 μm to 2 μm, and   said B layer has a thickness which is smaller than the thickness of said first resin layer, the method comprising:   a step A of using said first resin composition to form said first resin layer and   a step D of superposing said fiber base material in which said second resin composition is impregnated on said first resin layer to form said second resin layer.   
     
     
         4 . The method of production of the prepreg as set forth in  claim 3  further comprising, after superposing said fiber base material in which said second resin composition is impregnated on said first resin layer, then further applying or casting said second resin composition on said fiber base material to form said second resin layer.