Patent ID: 7163732

Claim:
A sanitary tissue paper for a sanitary tissue paper roll, comprising: one of a one-ply paper and a two-ply paper, wherein said one-ply paper has characteristics such that (i) upon subjecting a sample of said one-ply paper to a compression load of at most 50 gf/cm 2 between circular compression surfaces of steel plates, with each of the circular compression surfaces having an area of 2 cm 2 , and then relieving the sample of the compression load so as to allow the sample to return to an original condition, a linearity of a displacement curve between the compression load and a thickness of the sample is 0.25–0.33, and (ii) while subjecting the sample of said one-ply paper to a compression load of 50 gf/cm 2 between the circular compression surfaces, a thickness of the sample is at least 0.14 mm, and wherein said two-ply paper has characteristics such that (i) upon subjecting a sample of said two-ply paper to a compression load of at most 50 gf/cm 2 between circular compression surfaces of steel plates, with each of the circular compression surfaces having an area of 2 cm 2 , and then relieving the sample of the compression load so as to allow the sample to return to an original condition, a linearity of a displacement curve between the compression load and a thickness of the sample is 0.34–0.37, and (ii) while subjecting the sample of said two-ply paper to a compression load of 50 gf/cm 2 between the circular compression surfaces, a thickness of the sample is at least 0.25 mm.