Tohoku University

Daio Paper Corporation

Risa Nakane

Kazuo Hokkirigawa

Shuta Yasui

Takeshi Yamaguchi

Kei Shibata

Hidenori Yorozu

Naoya Yamai

To provide tissue paper excellent in softness and smoothness. In tissue paper that is two-ply non-moisturizing tissue paper to which no chemical solution is applied, a basis weight per sheet is 10.0 to 18.0 g/m, the thickness of two plies is 100 to 240 &#x3bc;m, a dry tensile strength in the paper horizontal direction is 70 to 180 cN/25 mm, a wet tensile strength in the paper horizontal direction is 25 to 55 cN/25 mm, and a free sensory evaluation value Ecalculated according to the following Equation 1 is 3.7 to 6.6, and a slip sensory evaluation value Ecalculated according to the following Equation 2 is 5.0 to 8.2.Free sensory evaluation value=&#x2212;2.879&#xd7;(dry tensile strength in paper horizontal direction)+6.55&#xd7;(wet tensile strength in paper horizontal direction)+5.36&#x2003;&#x2003;(Equation 1)Slip sensory evaluation value=&#x2212;8.80&#xd7;(dynamic friction coefficient)&#x2212;0.41&#xd7;(arithmetic mean surface roughness)+13.58&#x2003;&#x2003;(Equation 2)

Tissue paper and method of evaluating the same

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Sendai, Japan

Risa Nakane