Patent ID: 8318298

Claim:
A layered sheet, comprising: a base material sheet; and a polyurethane foamed layer, wherein the polyurethane foamed layer has interconnected oval cells having a long axis parallel to a thickness direction of the polyurethane foamed layer, and a ratio of an average major axis L to an average minor axis S of the oval cells in a section of the polyurethane foamed layer is 1.5 to 3, the oval cells have an average major axis L of 50 to 150 μm and an average minor axis S of 10 to 100 μm, the interconnected oval cells have cell surfaces in which circular holes are formed so that an average diameter of the circular holes is 50 μm or less, and wherein a polishing rate stability of the layered sheet after treatment of 500 glass substrates is within 10%.