中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

204 records (took 0.024 seconds)

    21.
    发明专利
    未知

    公开(公告)号：DE3788821D1

    公开(公告)日：1994-03-03

    申请号：DE3788821

    申请日：1987-05-08

    Applicant: TORAY INDUSTRIES

    Inventor： TOGASHI RYOICHI ,  ANDO KATSUTOSHI

    IPC: B01D39/08 ,  B01D39/16 ,  B03C3/28 ,  B05B5/08 ,  D04H1/56 ,  D04H1/728 ,  D04H3/033 ,  H01G7/02

    Abstract: A process and apparatus for producing a non-woven, especially a non-woven electret, fiber sheet provides for directing the non-woven fibers at a collecting surface and into an electric field between at least one electrode and the collecting surface. This process, in which the fibers are collected in the electric field, enables economical production of a non-woven electret fiber sheet of a single layer structure having a large amount of polarized charges (giving a total electric charge per unit area of at least 7 x 10 Coulomb/cm ), and a weight per unit area of at least 60 g/m , preferably greater than 80 g/m . The non-woven electret sheet may have the large amount of electret charge throughout its thickness and/or a uniform weight distribution and thus have excellent dust collecting properties.

    23.
    发明专利
    未知

    公开(公告)号：DK13891A

    公开(公告)日：1991-03-27

    申请号：DK13891

    申请日：1991-01-25

    Applicant: TORAY INDUSTRIES

    Inventor： ANDO KATSUTOSHI ,  TOGASHI RYOICHI

    IPC: A42B1/04 ,  A42B1/18

    Abstract: PCT No. PCT/JP89/00532 Sec. 371 Date Mar. 25, 1991 Sec. 102(e) Date Mar. 25, 1991 PCT Filed May 26, 1989 PCT Pub. No. WO90/14024 PCT Pub. Date Nov. 29, 1990.A dust-proof headgear which, although having a simple construction, exhibits an excellent dust-proof performance to thereby remarkably reduce a scattering of hair, dandruff and dust from the wearer's head, while exhibiting a high air-permeability to thus eliminate any feeling of sultryness or stuffyness even when worn for a long time. The dust-proof headgear is made of a material having, as a major component thereof, an electret non-woven fabric having a surface electrostatic charge density of 1x10-10 Coulomb/cm2 or greater and an air-permeability of between 10 cc/cm2.sec and 1000 cc/cm2.sec. The headgear of the invention is highly effective for use in various fields of industry in which environmental contamination by contaminants from the heads of workers or habitants is strictly forbidden, e.g., the foodstuff industry, electronic industry, precision machining industry, and medical industry.

    24.
    发明专利
    未知

    公开(公告)号：NO910298D0

    公开(公告)日：1991-01-25

    申请号：NO910298

    申请日：1991-01-25

    Applicant: TORAY INDUSTRIES

    Inventor： ANDO KATSUTOSHI ,  TOGASHI RYOICHI

    IPC: A42B1/04 ,  A42B1/18 ,  A42B

    Abstract: PCT No. PCT/JP89/00532 Sec. 371 Date Mar. 25, 1991 Sec. 102(e) Date Mar. 25, 1991 PCT Filed May 26, 1989 PCT Pub. No. WO90/14024 PCT Pub. Date Nov. 29, 1990.A dust-proof headgear which, although having a simple construction, exhibits an excellent dust-proof performance to thereby remarkably reduce a scattering of hair, dandruff and dust from the wearer's head, while exhibiting a high air-permeability to thus eliminate any feeling of sultryness or stuffyness even when worn for a long time. The dust-proof headgear is made of a material having, as a major component thereof, an electret non-woven fabric having a surface electrostatic charge density of 1x10-10 Coulomb/cm2 or greater and an air-permeability of between 10 cc/cm2.sec and 1000 cc/cm2.sec. The headgear of the invention is highly effective for use in various fields of industry in which environmental contamination by contaminants from the heads of workers or habitants is strictly forbidden, e.g., the foodstuff industry, electronic industry, precision machining industry, and medical industry.

    29.
    发明专利
    未知

    公开(公告)号：FI94999B

    公开(公告)日：1995-08-31

    申请号：FI910377

    申请日：1991-01-25

    Applicant: TORAY INDUSTRIES

    Inventor： ANDO KATSUTOSHI ,  TOGASHI RYOICHI

    IPC: A42B1/04 ,  A42B1/18

    Abstract: PCT No. PCT/JP89/00532 Sec. 371 Date Mar. 25, 1991 Sec. 102(e) Date Mar. 25, 1991 PCT Filed May 26, 1989 PCT Pub. No. WO90/14024 PCT Pub. Date Nov. 29, 1990.A dust-proof headgear which, although having a simple construction, exhibits an excellent dust-proof performance to thereby remarkably reduce a scattering of hair, dandruff and dust from the wearer's head, while exhibiting a high air-permeability to thus eliminate any feeling of sultryness or stuffyness even when worn for a long time. The dust-proof headgear is made of a material having, as a major component thereof, an electret non-woven fabric having a surface electrostatic charge density of 1x10-10 Coulomb/cm2 or greater and an air-permeability of between 10 cc/cm2.sec and 1000 cc/cm2.sec. The headgear of the invention is highly effective for use in various fields of industry in which environmental contamination by contaminants from the heads of workers or habitants is strictly forbidden, e.g., the foodstuff industry, electronic industry, precision machining industry, and medical industry.

    30.
    发明专利
    未知

    公开(公告)号：NO177175B

    公开(公告)日：1995-04-24

    申请号：NO910298

    申请日：1991-01-25

    Applicant: TORAY INDUSTRIES

    Inventor： ANDO KATSUTOSHI ,  TOGASHI RYOICHI

    IPC: A42B1/04 ,  A42B1/18

    Abstract: PCT No. PCT/JP89/00532 Sec. 371 Date Mar. 25, 1991 Sec. 102(e) Date Mar. 25, 1991 PCT Filed May 26, 1989 PCT Pub. No. WO90/14024 PCT Pub. Date Nov. 29, 1990.A dust-proof headgear which, although having a simple construction, exhibits an excellent dust-proof performance to thereby remarkably reduce a scattering of hair, dandruff and dust from the wearer's head, while exhibiting a high air-permeability to thus eliminate any feeling of sultryness or stuffyness even when worn for a long time. The dust-proof headgear is made of a material having, as a major component thereof, an electret non-woven fabric having a surface electrostatic charge density of 1x10-10 Coulomb/cm2 or greater and an air-permeability of between 10 cc/cm2.sec and 1000 cc/cm2.sec. The headgear of the invention is highly effective for use in various fields of industry in which environmental contamination by contaminants from the heads of workers or habitants is strictly forbidden, e.g., the foodstuff industry, electronic industry, precision machining industry, and medical industry.

Patent Agency Ranking