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公开(公告)号：JPS5540738A
公开(公告)日：1980-03-22
申请号：JP11474078
申请日：1978-09-19
Applicant: TORAY INDUSTRIES
Inventor： KANDA TAKUMA , KAWAI TAKASHI
Abstract: PURPOSE:To prepare a poly-p-phenylene sulfide having high molecular weight, high melt viscosity and excellent moldability, by the use of a relatively small amount of an alkaline earth metal fatty acid salt as a polymerization assistant. CONSTITUTION:The objective polyphenylene sulfide is prepared by reacting (A) a p-dihalogenobenzene or a mixture of a p-dihalogenobenzene and a poly-halogeno- aromatic compound having at least three halogen substitution groups, with (B) an alkali sulfide (except lithium sulfide), in an organic amide solvent, in the presence of (C) an alkaline earth metal fatty acid salt (e.g. calcium acetate) as a polymerization assistant. The molar ratios of (A):(B):(C) are pref. 0.95-1.2:1: 0.10-0.35. EFFECT:The composition can be easily melt-molded to obtain an article having high chemical resistance, flame-retardancy and heat resistance.
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公开(公告)号：JPH04187226A
公开(公告)日：1992-07-03
申请号：JP31631790
申请日：1990-11-20
Applicant: TORAY INDUSTRIES
Inventor： KAWAI TAKASHI , SAITO ISOO , HONDA CHIKARA
Abstract: PURPOSE:To form a polyamide hollow yarn membrane with the internal structure exhibiting excellent elastic recovery and micropore forming property by wet-heat-treating a polyamide hollow yarn having 15X10 to 35X10 birefringence and with both ends opened while keeping the yarn tensionless. CONSTITUTION:A polyamide hollow yarn having 15X10 to 35X10 birefringence and with one or both ends opened is wet-heat-treated with pressurized steam or pressurized hot water while keeping it tensionless to produce a polyamide hollow yarn membrane. The obtained membrane gas 25X10 to 40X10 birefringence in its orientation direction, >=1.150g.cm density, >=70% elastic recovery rate at 50% elongation and >=1.0X10 cm .cm .sec .cmHg nitrogen diffusibility at 50% elongation. The membrane is drawn and heat-treated, as required, to fix its internal structure and to further orient the crystal lamella. The ordinary crystalline polyamide such as nylon 6, nylon 66, nylon 12, nylon 610 and nylon 46 is exemplified as the polyamide.
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公开(公告)号：JPH02284634A
公开(公告)日：1990-11-22
申请号：JP10814889
申请日：1989-04-26
Applicant: TORAY INDUSTRIES
Inventor： KAWAI TAKASHI , FUKADA KUNITADA , KATSU TOMOKO
Abstract: PURPOSE:To obtain a porous membrane capable of being made effectively hydrophilic and ensuring satisfactory water permeability by heat-treating a molded body of a mixture of polytetrafluoroethylene resin dispersed in a liq. with a fiber forming polymer, removing the polymer and sticking a surfactant. CONSTITUTION:Polytetrafluoroethylene(PTFE) resin dispersed in a liq. is mixed with a fiber forming polymer such as viscose and this mixture is molded. The molded body is heat-treated at the m.p. of the PTFE resin or above, then the fiber forming polymer is removed. A surfactant having
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公开(公告)号：JPH02284633A
公开(公告)日：1990-11-22
申请号：JP10619289
申请日：1989-04-25
Applicant: TORAY INDUSTRIES
Inventor： KAWAI TAKASHI , FUKADA KUNITADA , KATSU TOMOKO
Abstract: PURPOSE:To obtain the thin and wide porous membrane having micropores by mixing a dispersion of a polytetrafluoroethylene-based resin, a fiber forming polymer, a porosity imparting agent and a dispersant for the agent, heating the obtained formed mixture and then removing the polymer and agent. CONSTITUTION:The dispersion of a polytetrafluoroethylene-based resin, a fiber forming polymer (e.g. a cellulose sodiumxanthate-based polymer, etc., are appropriate in the case of aq. dispersion), a porosity imparting agent (e.g. calcium silicate, silicone oil, etc.) and a dispersant for the agent are mixed preferably at
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公开(公告)号：JPS6475535A
公开(公告)日：1989-03-22
申请号：JP23334387
申请日：1987-09-17
Applicant: TORAY INDUSTRIES
Inventor： HENMI MASAHIRO , KAWAI TAKASHI , YOSHIOKA TOSHIO
Abstract: PURPOSE:To provide the titled anion exchange membrane characterized by a structure having a specific constituent unit and a specific functional group, having excellent chemical resistance and heat-resistance and suitable for the simultaneous removal of ionic substances and fine particles or the selective separation of ionic substances. CONSTITUTION:A part of the structure of a porous membrane of a fluoropolymer (e.g. polyvinylidene fluoride or ethylene-tetrafluoroethylene copolymer) consisting of a combination of (A) one or more constituent units selected from -CF2-, -CFRf- and -CF(ORf)- and (B) one or more constituent units selected from -CH2-, -CHF- and -CClF- is substituted with a functional group of formula (Rf is perfluoroalkyl; n is 1-9; R is H or CmH2m+1; m is 1-3; A is anion) to obtain the objective membrane.
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Patent Agency Ranking
公开(公告)号：JPS6447409A
公开(公告)日：1989-02-21
申请号：JP20231987
申请日：1987-08-12
Applicant: TORAY INDUSTRIES
Inventor： KAWAI TAKASHI , YAMAMURA HIROYUKI , NISHIMURA KAZUHIKO
IPC: B01D63/02
Abstract: PURPOSE:To obtain a hollow yarn module generating a very small amt. of leached matter and having superior chemical and heat resistances by fixing the end of a bundle of hollow yarn with a resin having a lower m.p. than the transition point of the hollow yarn. CONSTITUTION:Pieces of hollow yarn made of a resin such as a tetrafluoroethylene polymer are bundled. The tip of the bundle is dipped in an aq. dispersion of a resin having a lower m.p. than the transition point, e.g., the m.p. of the hollow yarn, e.g., a tetrafluoroethylene-hexafluoropropylene copolymer and the dipped tip is dried. By repeating the dipping and drying, a resin coat is formed on the surface of the hollow yarn. The coat part of the bundle is clamped with a film of said tetrafluoroethylene-hexafluoropropylene copolymer and the resin is melted by heating to adhere the hollow yarn. A sealing member of housing made of said tetrafluoroethylene polymer is inserted into the adhered part of the hollow yarn and pellets of said tetrafluoroethylene- hexafluoropropylene copolymer are filled and heated to fix the sealing member in the bundle.
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公开(公告)号：JPS6447407A
公开(公告)日：1989-02-21
申请号：JP20213387
申请日：1987-08-13
Applicant: TORAY INDUSTRIES
Inventor： KAWAI TAKASHI , YAMAMURA HIROYUKI , NISHIMURA KAZUHIKO
Abstract: PURPOSE:To obtain a hollow yarn module generating a very small amt. of leached matter and having superior chemical and heat resistances by forming all the constituent members of the module with a tetrafluoroethylene polymer. CONSTITUTION:Liq. stock prepd. by uniformly mixing an aq. dispersion of a tetrafluoroethylene polymer with a fiber forming polymer such as sodium alginate is spun from a spinneret together with a core liq. and solidified in a solidifying liq. The resulting hollow yarn is heat treated, immersed in a sulfuric acid-nitric acid mixed soln. and allowed to stand to remove the fiber forming polymer from the hollow yarn and to make the yarn porous. Pieces of such porous hollow yarn are bundled and the tip of the bundle is dipped in an aq. dispersion of said tetrafluoroethylene polymer and dried. By repeating the dipping and drying, a resin coat is formed on the surface of the hollow yarn. The coat part of the bundle is then clamped with a tetrafluoroethylene polymer film and only the end is heated to melt the polymer and to fix the hollow yarn. The bundle is incorporated into housing made of said tetrafluoroethylene polymer and the housing is heated to fix the bundle by melting.
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公开(公告)号：JPS6434408A
公开(公告)日：1989-02-03
申请号：JP19332387
申请日：1987-07-30
Applicant: TORAY INDUSTRIES
Inventor： KAWAI TAKASHI , KATSU TOMOKO , YOSHIOKA TOSHIO
Abstract: PURPOSE:To obtain a separation membrane wherein control of a pore diameter is made easy and membrane thickness can be made thin by constituting the membrane of both a permeable layer having many fine pores of specified average pore diameter and a supporting layer having many pores wherein the average pore diameter in the face parallel to the surface of the membrane is specified. CONSTITUTION:A uniform raw liquid is obtained by adding an aq. soln. dissolved with both a fiber formable polymer such as sodium alginate and an additive such as calcium carbonate to an aqueous dispersion in which polytetrafluoroethylene is dispersed in an aqueous medium contg. a surfactant. This raw liquid is extruded through a mouthpiece for hollow yarn together with core liquid consisting of a coagulating liquid such as a calcium chloride aq. soln. and coagulated in the coagulating liquid and washed with water and thereafter heat-treated at the temp. not lower than m.p. of the resin. This molded form is immersed into the mixed liquid of sulfuric acid and nitric acid to remove the fiber formable polymer and the additive and a porous hollow yarn membrane is obtained. Whereby the separation membrane consisting of both a permeable layer having fine many pores of 0.01-2mu average pore diameter and a supporting layer having many pores wherein the average pore diameter in the face parallel to the surface of the membrane is regulated to 2-20mu is obtained.
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公开(公告)号：JPS63287593A
公开(公告)日：1988-11-24
申请号：JP12168087
申请日：1987-05-19
Applicant: TORAY INDUSTRIES
Inventor： KAWAI TAKASHI , KATSU TOMOKO , TANAKA KAZUSANE
Abstract: PURPOSE:To obtain a miniaturized, lightweight straw type water purifier suitable for a portable purifier capable of supplying safe and comfortable water to drink by intermediating hollow thread films in a liquid passage in a straw and filtrating bacteria and fine grains. CONSTITUTION:After large foreign matters (e.g. rusted metal pieces, sand, etc.) are removed out of raw water, it is introduced into a module case 2 composed of hollow thread films. Liquid is passed from the outside of the hollow thread films 1 of organic matters such as cellulose, polyacrylonitrile, polymethylmethacrylate, etc., and inorganic matters into the hollow internal part to filtrate bacteria and fine grains and obtain pure water. This pure water is supplied from within the hollow thread films 1 through a mouthpiece 6. Therefore, it is possible to miniaturize and to make the water purifier lightweight and protect bacteria from penetrating by using hollow thread films in the water purifier. Moreover, it is possible to remove turbidity, uncomfortable smell, uncomfortable taste out of the raw water by combining adsorbent such as activated carbon etc.
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公开(公告)号：JPH06114241A
公开(公告)日：1994-04-26
申请号：JP26507592
申请日：1992-10-02
Applicant: TORAY INDUSTRIES
Inventor： NISHIMURA TETSUO , YOSHIKAWA SEIICHI , KAWAI TAKASHI
Abstract: PURPOSE:To provide a method for safely and easily producing a separation membrane module. CONSTITUTION:This fluid separation membrane module is a fluorine-base porous separation membrane module having such structure that at least a part of fine pores in the fluorine-base porous separation membrane is impregnated with a solidified potting material in the potting part of the module. This module is produced by treating the surface of the fluorine-base porous separation membrane with a surfactant and then bonding plural numbers of fluorine-base porous separation membranes with a potting agent having viscosity between in 100 to 1000 cp.
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