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公开(公告)号：US20210040274A1
公开(公告)日：2021-02-11
申请号：US17078365
申请日：2020-10-23
发明人： Ken YOSHIDA , Hirotoshi YOSHIDA , Keisuke HAGI , Masayuki TSUJI , Taketo KATO , Yuuji TANAKA , Taku YAMANAKA , Kazuya KAWAHARA , Masamichi SUKEGAWA , Kazutaka HOSOKAWA
摘要： Powder including low molecular weight polytetrafluoroethylene having a melt viscosity of 1×102 to 7×105 Pa·s at 380° C., having a melt viscosity of 1×102 to 7×105 Pa·s at 380° C., having an average particle size of 1.0 to 50 μm, and containing 30 or more carboxyl groups at ends of the molecule chain per 106 carbon atoms in the main chain, wherein the powder is substantially free from C8-C14 perfluorocarboxylic acids and salts thereof.
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公开(公告)号：US20210206968A1
公开(公告)日：2021-07-08
申请号：US17057196
申请日：2019-05-15
发明人： Ken YOSHIDA , Hirokazu YUKAWA , Keisuke HAGI
摘要： The invention provides a resin composition having a low abrasion coefficient and a low tendency to scratch the surface of an aluminum article when brought into contact with the aluminum article. The resin composition contains a crystalline resin having a melting point of 290° C. or higher, a graphite yarn (A) having a crystallite size in a c-axis direction of not greater than 30.0 Å, and a graphite yarn (B) having a crystallite size in a c-axis direction of greater than 100.0 Å.
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3.发明公开公开(公告)号：US20230183430A1
公开(公告)日：2023-06-15
申请号：US18103443
申请日：2023-01-30
发明人： Ken YOSHIDA , Hirotoshi YOSHIDA , Keisuke HAGI , Masayuki TSUJI , Taketo KATO , Yuuji TANAKA , Taku YAMANAKA , Kazuya KAWAHARA , Masamichi SUKEGAWA , Kazutaka HOSOKAWA
CPC分类号： C08J3/12 , C08J3/28 , C08F8/50 , C08F8/06 , C08F14/26 , C08F2800/20 , C08J2327/22 , C08F2810/40 , C08F2500/07 , C08F2500/17 , C08J2327/18
摘要： Powder including low molecular weight polytetrafluoroethylene having a melt viscosity of 1×102 to 7×105 Pa·s at 380° C., having a melt viscosity of 1×102 to 7×105 Pa·s at 380° C., having an average particle size of 1.0 to 50 μm, and containing 30 or more carboxyl groups at ends of the molecule chain per 106 carbon atoms in the main chain, wherein the powder is substantially free from C8-C14 perfluorocarboxylic acids and salts thereof.
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公开(公告)号：US20210206946A1
公开(公告)日：2021-07-08
申请号：US17057228
申请日：2019-05-15
发明人： Ken YOSHIDA , Keisuke HAGl , Hirokazu YUKAWA
摘要： A polytetrafluoroethylene composition containing polytetrafluoroethylene and fibrous filler. The fibrous filler has an average fiber length of 100 μm or shorter and includes fibers having a fiber length of longer than 160 μm in a proportion of 15% by mass or less.
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5.发明申请公开(公告)号：US20200123283A1
公开(公告)日：2020-04-23
申请号：US16696970
申请日：2019-11-26
发明人： Ken YOSHIDA , Hirotoshi Yoshida , Keisuke Hagi , Masayuki Tsuji , Taketo Kato , Yuuji Tanaka , Taku Yamanaka , Kazuya Kawahara , Masamichi Sukegawa , Kazutaka Hosokawa
摘要： Low molecular weight polytetrafluoroethylene powder having a complex viscosity of 1×102 to 7×103 Pa·s at 380° C., containing 5 or less carboxyl groups at ends of the molecule chain per 106 carbon atoms in the main chain, and being substantially free from C8-C14 perfluorocarboxylic acids and salts thereof. Also disclosed is a method for producing low molecular weight polytetrafluoroethylene.
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6.发明申请公开(公告)号：US20190023856A1
公开(公告)日：2019-01-24
申请号：US16069735
申请日：2017-08-04
发明人： Ken YOSHIDA , Hirotoshi YOSHIDA , Keisuke HAGI , Masayuki TSUJI , Taketo KATO , Yuuji TANAKA , Taku YAMANAKA , Kazuya KAWAHARA , Masamichi SUKEGAWA , Kazutaka HOSOKAWA
摘要： The invention provides a production method for producing low molecular weight polytetrafluoroethylene enabling easy removal of most of C8-C14 perfluorocarboxylic acids and salts thereof, which are unfortunately generated by irradiation, from the low molecular weight polytetrafluoroethylene. The method for producing low molecular weight polytetrafluoroethylene includes: (1) irradiating polytetrafluoroethylene to provide low molecular weight polytetrafluoroethylene having a melt viscosity of 1×102 to 7×105 Pa·s at 380° C.; (2) pulverizing the low molecular weight polytetrafluoroethylene; and (3) heating the low molecular weight polytetrafluoroethylene pulverized in the step (2).
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7.发明申请公开(公告)号：US20190023818A1
公开(公告)日：2019-01-24
申请号：US16069052
申请日：2017-08-04
发明人： Ken YOSHIDA , Hirotoshi YOSHIDA , Keisuke HAGI , Masayuki TSUJI , Taketo KATO , Yuuji TANAKA , Taku YAMANAKA , Kazuya KAWAHARA , Masamichi SUKEGAWA , Kazutaka HOSOKAWA
摘要： The invention provides a method for producing low molecular weight polytetrafluoroethylene less likely to generate C8-C14 perfluorocarboxylic acids and salts thereof. The method for producing low molecular weight polytetrafluoroethylene includes: (1) feeding into an airtight container: polytetrafluoroethylene; at least one additive selected from the group consisting of hydrocarbons, chlorinated hydrocarbons, alcohols, and carboxylic acids other than C8-C14 perfluorocarboxylic acids; and at least one selected from the group consisting of inert gases other than the above additive and oxygen adsorbents; and (2) irradiating the polytetrafluoroethylene to provide low molecular weight polytetrafluoroethylene having a complex viscosity of 1×102 to 7×105 Pa·s at 380° C.
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公开(公告)号：US20170000093A1
公开(公告)日：2017-01-05
申请号：US14900261
申请日：2014-06-20
发明人： Ken YOSHIDA , Kazuya KAWAHARA , Masayuki TSUJI
CPC分类号： A01K75/00 , A01K61/60 , D03D15/00 , D10B2321/042 , D10B2401/20 , D10B2507/02 , Y02A40/826
摘要： The present invention aims to provide a fabric for preventing adhesion of aquatic organisms which is excellent in an effect of preventing adhesion of aquatic organisms and in strength, which readily sinks in water, and which is suitable for use in various forms and environments. The fabric for preventing adhesion of aquatic organisms of the present invention includes yarn containing a fluororesin.
摘要翻译： 本发明的目的在于提供一种防止水生生物附着的织物，其具有优异的防止水生生物的粘附和强度的作用，其易于沉入水中，适用于各种形式和环境。 用于防止本发明的水生生物附着的织物包括含有氟树脂的纱线。
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