Title:
A process of composite sheet material
Document Type and Number:
Japanese Patent JP5948544
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a sheet material which has practical strength while retaining advantages of a nonwoven fabric composed of fine cellulose fiber, including fine pore diameters, high heat resistance, resistance to organic solvents and high liquid permeability as well as possible, is produced by a film production method in an aqueous system and can complement disadvantages of the nonwoven fabric, including low water resistance.SOLUTION: A composite sheet material has a basis weight of 5-100 g/m, contains a cellulose microfibril (ingredient A) of a number average fiber diameter of 2-300 nm and one or more filler material (ingredient B) selected from inorganic particles, polymer particles, inorganic fibers and polymer fibers, in a fraction of ingredient A of 30-90 wt.%. The composite sheet material has an air permeation resistance at the basis weight of 10 g/mof 10-965 s/100 cc, a tensile strength of 0.50 kgf/15 mm or higher and a film thickness of 40.6 μm or smaller and is produced from an aqueous dispersion by paper-making and drying without intervention of an organic solvent.
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Inventors:
Hirofumi Ono
Mikihiko Nakamura
Mikihiko Nakamura
Application Number:
JP2014148582A
Publication Date:
July 06, 2016
Filing Date:
July 22, 2014
Export Citation:
Assignee:
ASAHI KASEI KABUSHIKI KAISHA
International Classes:
D21H11/18; D21H13/10; D21H13/36; D21H17/67; D21H27/30
Domestic Patent References:
| JP2008274525A |
Foreign References:
| WO2006004012A1 |
Attorney, Agent or Firm:
Atsushi Aoki
Takashi Ishida
Tetsuji Koga
Kazuhiro Nakamura
Toko Saito
Shunsuke Mima
Takashi Ishida
Tetsuji Koga
Kazuhiro Nakamura
Toko Saito
Shunsuke Mima