Daikin Industries, Ltd.

Kohei Yasuda

Makoto Ono

Taku Yamanaka

Masahiko Yamada

Shinichi Chaen

Masayuki Tsuji

Taketo Kato

Yasuhiko Sawada

Hirotoshi Yoshida

Yoshiyuki Shibuya

Haruhisa Masuda

Hiroyuki Yoshimoto

Takahiro Taira

Kunihiko Inui

Kazuya Kawahara

Nobuki Uraoka

Tomohisa Konishi

The present invention aims to provide a paste containing polytetrafluoroethylene which can be formed into a molded polytetrafluoroethylene article having a significantly small thickness of polytetrafluoroethylene and is less likely to cause defects in molding; and a method of producing the paste. The present invention provides a method of producing a paste, including the steps of coagulating primary particles of polytetrafluoroethylene in an aqueous dispersion that contains the primary particles and water to form slurry that contains secondary particles of polytetrafluoroethylene and water or secondary particles of polytetrafluoroethylene floating in water; and adding an organic solvent to at least one of the slurry and the secondary particles of polytetrafluoroethylene floating in water to provide the paste.

Paste containing polytetrafluoroethylene and method for producing same

The present invention aims to provide a modified polytetrafluoroethylene fine powder capable of providing a stretched body having high strength, a small pore size, and excellent homogeneity. The modified polytetrafluoroethylene fine powder of the present invention has non-melt-processability, has a standard specific gravity of 2.155 or lower, includes 0.015 mol % or more of a polymer unit derived from perfluoro(methyl vinyl ether) in all the monomer units, is obtained by emulsion polymerizing tetrafluoroethylene and at least the perfluoro(methyl vinyl ether) in the presence of a fluorosurfactant having a LogPOW value of 3.4 or lower, and has an extrusion pressure of 20.0 MPa or lower.

Modified polytetrafluoroethylene fine powder and uniaxially stretched porous body

The present invention provides a porous body having high strength, a small pore size, and excellent homogeneity. The porous body of the present invention includes polytetrafluoroethylene and has a microstructure that includes nodes and fibrils. The microstructure further includes, in addition to the nodes and the fibrils, fused points where a fibril that links two nodes and another fibril that links another two nodes are fused with each other.

Porous body, polymer electrolyte membrane, filter material for filter, and filter unit

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Settsu, Japan

Kohei Yasuda