MANUFACTURE OF LAMINATED SHEET

摘要

PURPOSE:To permit to manufacture the titled sheet prominent in punching workability and warping characteristic by a method wherein the molding thereof is effected by combining two kinds of base materials having different containing amount of alpha-cellulose respectively. CONSTITUTION:A base material, consisting of a base paper for a laminated sheet made by making cellulose fiber containing 88% or more of alpha-cellulose impregnated and adhered with a predetermined amount of thermocuring resin, and another base material, consisting of a base paper for the laminated sheet made by making cellulose fiber containing 75-88% of alpha-cellulose impregnated and adhered with a predetermined amount of thermocuring resin, are combined to mold the tille sheet. Here, the laminated sheet having well-balanced punching workability and warping characteristic can be made by combining the surface layer of laminated sheet made by the base material using a base paper containing 88% or more of alpha-cellulose and the inner layer of base material using a base paper containing 75-88% of alpha-cellulose. According to this method, surface crack may be improved and warping behavior may be stabilized.