The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 04, 2023
Filed:
Oct. 29, 2018
Daio Paper Corporation, Shikokuchuo, JP;
Tohoku University, Sendai, JP;
Shuta Yasui, Fujinomiya, JP;
Hidenori Yorozu, Tokyo, JP;
Kazuo Hokkirigawa, Sendai, JP;
Takeshi Yamaguchi, Sendai, JP;
Kei Shibata, Sendai, JP;
Naoya Yamai, Sendai, JP;
Risa Nakane, Sendai, JP;
DAIO PAPER CORPORATION, Ehime, JP;
TOHOKU UNIVERSITY, Miyagi, JP;
Abstract
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 μm, 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=−2.879×(dry tensile strength in paper horizontal direction)+6.55×(wet tensile strength in paper horizontal direction)+5.36  (Equation 1)Slip sensory evaluation value=−8.80×(dynamic friction coefficient)−0.41×(arithmetic mean surface roughness)+13.58  (Equation 2)