公开(公告)号：US11384483B2

公开(公告)日：2022-07-12

申请号：US17058478

申请日：2019-06-03

申请人： DAIO PAPER CORPORATION ,  TOHOKU UNIVERSITY

发明人： Sachiko Takahashi ,  Kazuo Hokkirigawa ,  Takeshi Yamaguchi ,  Kei Shibata

IPC分类号： D21H27/30 ,  A47K10/16 ,  D21H27/00

摘要： The present invention is directed to a non-moisturizing high-grade type tissue paper having excellent softness wherein the polyol applied to the two-ply tissue paper is not applied by external addition. In various embodiments, the tissue paper has a basis weight per ply of 14.0 to 17.0 g/m2, a paper thickness for two plies of 160 to 220 μm, and a water content of 4.0 to 9.0% by mass, contains 0.15 to 0.45% by mass of an oily component to be extracted with diethyl ether, and has a bending rigidity of less than 0.006 gf·cm/cm in CD (cross direction) and a bending recovery force of less than 0.005 gf·cm/cm in CD.

公开(公告)号：US11692993B2

公开(公告)日：2023-07-04

申请号：US16762896

申请日：2018-10-29

申请人： DAIO PAPER CORPORATION ,  TOHOKU UNIVERSITY

发明人： Shuta Yasui ,  Hidenori Yorozu ,  Kazuo Hokkirigawa ,  Takeshi Yamaguchi ,  Kei Shibata ,  Naoya Yamai ,  Risa Nakane

IPC分类号： G01N33/34 ,  A47K10/16 ,  D21H27/00

CPC分类号： G01N33/34 ,  A47K10/16

摘要： 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/m2, 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 Ef calculated according to the following Equation 1 is 3.7 to 6.6, and a slip sensory evaluation value Es calculated according to the following Equation 2 is 5.0 to 8.2.

Free sensory evaluation value Ef=−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 Es=−8.80×(dynamic friction coefficient)−0.41×(arithmetic mean surface roughness)+13.58  (Equation 2)

公开(公告)号：US10570568B2

公开(公告)日：2020-02-25

申请号：US15758893

申请日：2016-08-04

申请人： DAIO PAPER CORPORATION ,  TOHOKU UNIVERSITY

发明人： Shuta Yasui ,  Norimitsu Hirata ,  Hidenori Yorozu ,  Kazuo Hokkirigawa ,  Takeshi Yamaguchi ,  Kei Shibata ,  Wataru Tanabe ,  Shohei Matsumura

IPC分类号： D21H27/00 ,  A47K10/16 ,  D21H27/30

摘要： An all-purpose type tissue paper. A two-ply tissue paper that does not have moisturizer applied thereon, that has a basis weight per ply of 10.0-16.0 g/m2, a paper thickness per two-ply of 120-200 μm, a softness of not more than 1.0, a dry tensile strength (T) in the MD direction of 240-300 cN/25 mm, and an average dynamic friction coefficient of 1.40-1.65.