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Применить Всего найдено 5. Отображено 5.
04-06-2015 дата публикации

MODIFIED POLYTETRAFLUOROETHYLENE FINE POWDER AND UNIAXIALLY ORIENTED POROUS BODY

Номер: WO2015080289A1
Автор: YAMANAKA Taku, ONO Makoto, YASUDA Kohei, YAMADA Masahiko, CHAEN Shinichi, SAWADA Yasuhiko, TAIRA Takahiro, YOSHIDA Hirotoshi, KATO Taketo
Принадлежит:

The purpose of the present invention is to provide a modified polytetrafluoroethylene fine powder for obtaining an oriented body having high strength, small pore size, and excellent homogeneity. The present invention is a modified polytetrafluoroethylene fine powder characterized by having non-molten secondary workability, having a standard specific gravity of 2.155 or lower, containing 0.015 mol% or more polymerized units from perfluoro(methylvinylether) relative to the total monomer units, being obtained by emulsion copolymerization of tetrafluoroethylene and at least perfluoro(methylvinylether) in the presence of a fluorine-containing surfactant having a Log POW of 3.4 or less, and having an extrusion pressure of 20.0 MPa or lower.

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Номер записи: 1
28-06-2012 дата публикации

POLYTETRAFLUOROETHYLENE MIXTURE

Номер: WO2012086721A1
Автор: SAWADA Yasuhiko, KASAI Shunji, YAMANAKA Taku, SHIBUYA Yoshiyuki, INUI Kunihiko, CHAEN Shinichi
Принадлежит:

Disclosed is a material capable of forming a polytetrafluoroethylene porous film which can readily be stretched biaxially, is capable of uniform stretching even at high stretching ratios, and has low pressure loss. The disclosed polytetrafluoroethylene mixture contains (A) a polytetrafluoroethylene having non-melt workability obtained by emulsion polymerization of tetrafluoroethylene, and (B) a polytetrafluoroethylene having non-melt workability obtained by suspension polymerization of tetrafluoroethylene.

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Номер записи: 2
28-06-2012 дата публикации

POLYTETRAFLUOROETHYLENE MIXTURE

Номер: WO2012086717A1
Автор: SAWADA Yasuhiko, KASAI Shunji, YAMANAKA Taku, SHIBUYA Yoshiyuki, INUI Kunihiko, CHAEN Shinichi
Принадлежит:

Disclosed is a material capable of forming a PTFE porous film which can readily be stretched biaxially, is capable of uniform stretching even at high stretching ratios, and has low pressure loss. The disclosed polytetrafluoroethylene mixture is of a modified polytetrafluoroethylene having fibrillation properties and a homo-polytetrafluoroethylene, wherein said homo-polytetrafluoroethylene has a breaking strength of 25N or greater.

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Номер записи: 3
28-06-2012 дата публикации

STRETCH MATERIAL

Номер: WO2012086725A1
Автор: SAWADA Yasuhiko, KASAI Shunji, YAMANAKA Taku, SHIBUYA Yoshiyuki, INUI Kunihiko, CHAEN Shinichi
Принадлежит:

Disclosed is a material capable of forming a polytetrafluoroethylene porous film which can readily be stretched biaxially, is capable of uniform stretching even at high stretching ratios, and has low pressure loss. The disclosed stretch material contains (A) a polytetrafluoroethylene having fibrillating properties and a standard specific gravity (SSG) of 2.130-2.230, and (B) a non-fibrillating, low molecular weight polytetrafluoroethylene having a melt viscosity of 1x102 to 7x105Pa.s at 380°C not irradiated by an electron beam or a radiation beam.

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Номер записи: 4
28-06-2012 дата публикации

POLYTETRAFLUOROETHYLENE MIXTURE

Номер: WO2012086710A1
Автор: SAWADA Yasuhiko, KASAI Shunji, YAMANAKA Taku, ONO Makoto, SHIBUYA Yoshiyuki, INUI Kunihiko, CHAEN Shinichi
Принадлежит:

Disclosed is a material capable of forming a polytetrafluoroethylene porous film which can readily be stretched biaxially, is capable of uniform stretching even at high stretching ratios, and has low pressure loss. The disclosed polytetrafluoroethylene mixture is of modified polytetrafluoroethylene and homo-polytetrafluoroethylene having fibrillation properties, wherein the modified polytetrafluoroethylene has a cylindrical extrusion pressure of 70 MPa or greater at a reduction ratio of 1600.

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Номер записи: 5