-
公开(公告)号：JPH05190389A
公开(公告)日：1993-07-30
申请号：JP172292
申请日：1992-01-08
Applicant: TORAY INDUSTRIES
Inventor： ANDO KATSUTOSHI , TAKAHASHI MASAKADO , KONDO GORO
Abstract: PURPOSE:To provide an antibacterial electret material which possesses both an antibacterial characteristic and the characteristic of an electret, and is also stabilized in electric charge. CONSTITUTION:An antibacterial electret material consists of a synthetic organic polymer having a volume resistivity of 10 OMEGA.cm or more. This synthetic organic polymer contains a heat stabilizer ranging from 0.01%-2% and inorganic matter, containing metal ions, in a range from 0.1% to 4% as an antibacterial agent, and also gas a surface charge density of 1X10 Coulomb/cm or more.
-
公开(公告)号：JPH0559654A
公开(公告)日：1993-03-09
申请号：JP21559091
申请日：1991-08-27
Applicant: TORAY INDUSTRIES
Inventor： ANDO KATSUTOSHI
IPC: D04H1/56 , D04H3/073 , D06M10/00 , D06M101/00 , D06M101/16 , D06M101/18 , H01G7/02
Abstract: PURPOSE:To obtain the title nonwoven fabric having excellent adsorbability, filtering characteristics, excellent strength, neither elongating nor breaking, having no sewed part by transporting a fibrous material with a fluid and treating by a specific method. CONSTITUTION:First, a fibrous material 4 is transported with a fluid and a web 8 made into electret is formed while collecting the fibrous material on a first rotator 6 in a DC electric field. Then, the web 8 is transferred from the first rotator 6 to a second rotator 9 and formed into a cylindrical material 10 on the second rotator 9. Finally, the formed cylindrical material 10 is taken out in the axial direction of the second rotator 9 to give the objective nonwoven fabric 12 having >=1X10 Coulomb/cm surface charge density. The DC electric field is preferably produced between an impressed electrode 5 and the earthed first rotator 6 by using a DC high-voltage generator 7. The first rotator is preferably composed of a porous material through which a fluid is passed and the second rotator has preferably the surface having low frictional resistance such as aventurine surface.
-
公开(公告)号：JPH04370261A
公开(公告)日：1992-12-22
申请号：JP14040291
申请日：1991-06-12
Applicant: TORAY INDUSTRIES
Inventor： KURATA NOBUO , ANDO KATSUTOSHI
Abstract: PURPOSE:To obtain cylindrical nonwoven fabric neither elongating nor breaking during production by making a web formed from a fibrous material transported by a fluid into a cylindrical state on a rotator and taking-off the cylindrical material in the direction of revolving shaft. CONSTITUTION:Melt blow fibers 2 are collected on a first rotator 3 to form a web 4, transferred to a second rotator 6 and formed into a cylindrical material 7. The cylindrical material is drawn out in the shaft direction of the second rotator and the cylindrical nonwoven fabric 9 is taken-off by a take-up roller 10. Diameter and density of the cylindrical nonwoven fabric can be freely changed and cylindrical nonwoven fabric with heavy weight can be obtained.
-
公开(公告)号：JPH0450353A
公开(公告)日：1992-02-19
申请号：JP15123990
申请日：1990-06-08
Applicant: TORAY INDUSTRIES
Inventor： OKUMURA YOSHIHARU , MATSUKI TOMIJI , ANDO KATSUTOSHI
Abstract: PURPOSE:To provide the subject nonwoven fabric having sufficient shape- recovering property, softness and small fiber diameter and useful for medical nonwoven fabrics, linings, etc., by mutually melt-bonding fibers after the fibers consisting of a shape-memorizing resin are extruded from fine holes until the spun fibers are gathered. CONSTITUTION:A block copolymer [melting heat peak expressed at 0-80 deg.C is >=0.5cal/g (measured with a differential scanning calorimeter)] comprising a high melting point crystalline segment consisting mainly of crystalline aromatic polyester units, preferably polybutylene terephthalate, and a low melting point segment consisting mainly of an aliphatic polylactone (60-99wt.% based on the copolymer), preferably poly (epsilon-caplolactone) is melted, extruded from the fine holes of a melt-blow device, drafted and divided with a high speed fluid and gathered on a conveyor to provide the objective nonwoven fabric wherein the fibers are melt-bonded to each other until gathered.
-
公开(公告)号：JPH0380907B2
公开(公告)日：1991-12-26
申请号：JP11813883
申请日：1983-07-01
Applicant: TORAY INDUSTRIES
Inventor： TOGASHI RYOICHI , ANDO KATSUTOSHI , NISHIURA EIICHI
-
Patent Agency Ranking
公开(公告)号：JPH02289173A
公开(公告)日：1990-11-29
申请号：JP10299489
申请日：1989-04-20
Applicant: TORAY INDUSTRIES
Inventor： IMAI SHIRO , TAGUCHI SETSUO , ANDO KATSUTOSHI
IPC: D06M10/00 , D01F8/06 , D01F8/08 , D01F8/10 , D01F8/14 , D06C29/00 , D06M10/02 , D06M101/00 , D06M101/16 , D06M101/18 , D06M101/20 , D06M101/22 , H01G7/02
Abstract: PURPOSE:To obtain the title material having high surface electric charge density, high cleaning power and slight dusting, comprising woven or knit fabric consisting essentially of continuous ultrathin filaments of polypropylene and polyethylene having specific fineness wherein the ultrathin filaments are entangled. CONSTITUTION:Polypropylene as an island component and polyethylene as a sea component are spun by using a sea-island type spinneret to prepare sea island type conjugate filament, which is used as warp and weft and woven to give high-density taffeta, which is treated with trichloroethylene, etc., and the sea component is extracted and removed to give the aimed material for cleaning cloth which is woven or knit fabric consisting essentially of continuous ultrathin filament of polypropylene and/or polyethylene having 0.5-0.05 denier wherein the ultrathin filaments are entangled between yarn-yarn and/or within yarn and the woven or knit fabric has >=1X10 c/cm absolute value of surface electric charge density.
-
公开(公告)号：JPH02263420A
公开(公告)日：1990-10-26
申请号：JP8518489
申请日：1989-04-03
Applicant: TORAY INDUSTRIES
Inventor： TOGASHI RYOICHI , ANDO KATSUTOSHI
Abstract: PURPOSE:To contrive the prevention of the generation of spark discharge and the improvement of the efficiency of a sheet formed into a coated electret by a method wherein the sheet formed into an electret is introduced from an electric field of a low field strength in an electric field of a high field strength. CONSTITUTION:A sheet 1 formed into an electret is moved along the outer periphery surface of an earth electrode 3 which is rotated, electrodes 4a, 4b,... and a corona electret field which is formed by a plurality of electrodes are made to pass through in order to perform a work of the electric. At this time, the applying electrodes 4a and 4e are arranged in such a way that the distance between an applying voltage and the electrode 3 becomes narrower as the distance goes from the electrode 4a toward the electrode 4e. Accordingly, a constant voltage is applied by a DC high-voltage power supply 5 and the side of the field strength of the sheet 1 becomes stronger by the electrode 4b and after electrodes, which act on the sheet 1 after the first electrode 4a to act on the sheet 1, then the field strength which is made strong by the first electrode 4a. Thereby, the sheet 1 having the good efficiency of the electret can be manufactured without the generation of speak discharge.
-
公开(公告)号：JPH02234965A
公开(公告)日：1990-09-18
申请号：JP5464389
申请日：1989-03-07
Applicant: TORAY INDUSTRIES
Inventor： TOGASHI RYOICHI , ANDO KATSUTOSHI
Abstract: PURPOSE:To provide a nonwoven fabric having excellent lint-free property and bulkiness, composed of a mixture of melt-blown fibers having a specific average fiber diameter, staple fibers, etc., partially bonded at the protruded parts of a hot embossing face and containing melt-blown fibers fixed with each other at the non-bonded part. CONSTITUTION:A nonwoven fabric is produced by mixing melt-blown fibers 1 having an average fiber diameter of
-
公开(公告)号：JPH02197110A
公开(公告)日：1990-08-03
申请号：JP13298589
申请日：1989-05-26
Applicant: TORAY INDUSTRIES
Inventor： ANDO KATSUTOSHI
IPC: H01G7/02 , D04H3/03 , D06M10/00 , D06M101/00 , D06M101/16 , D06M101/18 , D06M101/20 , D06M101/22
Abstract: PURPOSE:To form a non-woven fabric having excellent stability of electric charge for a long period of time by a method wherein a non-contact high-tension application treatment is conducted using the collection surface of a melt-blow non-woven fabric, which will be collected, as an earth electrode. CONSTITUTION:A melt-blow non-woven fabric 7 is formed by a melt-blow fiber 6 sent from a melt-blow mouth piece 1 through the intermediary of a collection drum 2. The collection surface of the drum 2 is formed into an earth electrode by an earth 3, and it becomes an electlet melt-blow non-woven fabric having a deep electric charge by a high-tension application treatment with which a compensating charge can be injected easily by a non-contact application electrode 4 and also having a large quantity of charge and uniform direction of polarization orientation. As a result, an electlet melt-blow non-woven fabric, which can be used effectively on a high characteristic filter, adsorption material and the like which have charge stability for a long period of time, can be manufactured. Besides, the same result can be obtained when a transfer surface is used instead of the collection surface.
-
公开(公告)号：JPH01298276A
公开(公告)日：1989-12-01
申请号：JP12675588
申请日：1988-05-24
Applicant: TORAY INDUSTRIES
Inventor： OKUMURA YOSHIHARU , ANDO KATSUTOSHI
IPC: B01D39/14 , D01F8/06 , D01F8/14 , D06M10/00 , D06M101/00 , D06M101/16 , D06M101/18 , D06M101/20 , D06M101/22 , H01G7/02
Abstract: PURPOSE:To provide the subject fiber having a large amount of stable surface electric charge by subjecting a sheath-core type fiber comprising a polar polymer having >= a specific volume resistivity as the core portion material thereof and a non-polar polymer as the sheath portion material thereof to an electret- forming treatment. CONSTITUTION:A fiber sheet comprising sheath-core type cross-sectional shape- having bicomponent fibers employing a polar polymer (e.g., polyester or polyamide) having a volume resistivity of >=10 OMEGAcm as the core portion material and a non-polar polymer (preferably polypropylene or polyethylene) having a volume resistivity of >=10 OMEGAcm as the sheath portion material is subjected to an electret-forming treatment in a DC electric field to provide an electret fiber sheet having good electret characteristics such as a large amount of retained stable surface electric charge. The produced electret fiber sheet is suitable for filters, masks, wipers, etc.
-
-
-
-
-
-
-
-
-
Search Results
204
records
(took 0.027 seconds)
