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    METHOD OF TREATING INNER SURFACE OF PLASTIC TUBE WITH PLASMA
    1.
    发明专利
    METHOD OF TREATING INNER SURFACE OF PLASTIC TUBE WITH PLASMA 未知

    公开(公告)号：CA1197810A

    公开(公告)日：1985-12-10

    申请号：CA422266

    申请日：1983-02-23

    Applicant: TORAY INDUSTRIES

    Inventor： HATADA KENJI ,  MIYAJIMA OSAMU ,  KOBAYASHI HIROAKI

    IPC: C08J7/00 ,  B29C59/14 ,  B29C71/04 ,  C08J7/04

    Abstract: In plasma-treating the inner surface of a plastic tube, the invention provides a treating method which ensures stable treatment under readily operative conditions. The present invention relates to a method comprising the steps of placing a plastic tube inside an electrically insulating tube wherein the difference between the inner diameter of the insulating tube and the outer diameter of the plastic tube is less than 2 mm, letting a gas into the plastic tube, keeping the inner pressures of both tubes at a reduced pressure, applying a high voltage across electrodes disposed outside the electrically insulating tube to initiate and sustain discharge inside the plastic tube and thus plasma-treating the inner surface of the plastic tube.

    METHOD OF TREATING INNER SURFACE OF PLASTIC TUBE WITH PLASMA
    2.
    发明专利
    METHOD OF TREATING INNER SURFACE OF PLASTIC TUBE WITH PLASMA 未知

    公开(公告)号：DE3378359D1

    公开(公告)日：1988-12-08

    申请号：DE3378359

    申请日：1983-02-18

    Applicant: TORAY INDUSTRIES

    Inventor： HATADA KENJI ,  MIYAJIMA OSAMU ,  KOBAYASHI HIROAKI

    IPC: C08J7/00 ,  B29C59/14 ,  B29C71/02

    Abstract: In plasma-treating the inner surface of a plastic tube, the invention provides a treating method which ensures stable treatment under readily operative conditions. The present invention relates to a method comprising the steps of placing a plastic tube inside an electrically insulating tube wherein the difference between the inner diameter of the insulating tube and the outer diameter of the plastic tube is less than 2 mm, letting a gas into the plastic tube, keeping the inner pressures of both tubes at a reduced pressure, applying a high voltage across electrodes disposed outside the electrically insulating tube to initiate and sustain discharge inside the plastic tube and thus plasma-treating the inner surface of the plastic tube.

    FLEXIBLE VINYL CHLORIDE RESIN MOLDING
    3.
    发明专利
    FLEXIBLE VINYL CHLORIDE RESIN MOLDING 失效

    公开(公告)号：JPS62112634A

    公开(公告)日：1987-05-23

    申请号：JP25337785

    申请日：1985-11-12

    Applicant: TORAY INDUSTRIES

    Inventor： HATADA KENJI ,  MIYAJIMA OSAMU ,  MORI YUICHI

    IPC: A61L29/00 ,  B29C71/04 ,  C08J7/00

    Abstract: PURPOSE:To obtain the titled molding by which blood can be preserved for a long time without lowering the functions of its components, by forming a specified crosslinked layer on at least part of the surface of a flexible vinyl chloride resin molding having a plasticizer. CONSTITUTION:A flexible vinyl chloride resin molding formed by mixing 100pts. wt. vinyl chloride resin with 30-110pts.wt. plasticizer [e.g., di(2-ethylhexyl) phthalate] and, optionally, a stabilizer (e.g., Ca-Zn stabilizer), a lubricant (e.g., low-MW PE), etc., and molding the resulting mixture into a sheet, tube or the like is plasma-treated to form a crosslinked layer which shows the following results of ESCA analysis: ratios between the numbers of atoms (C, O, Cl and N), 0.10 and a thickness of 1,000Angstrom -1.5mum.

    TREATMENT FOR ELECTRICAL DISCHARGE OF INNER FACE OF PLASTIC TUBE
    7.
    发明专利
    TREATMENT FOR ELECTRICAL DISCHARGE OF INNER FACE OF PLASTIC TUBE 失效

    公开(公告)号：JPS58157829A

    公开(公告)日：1983-09-20

    申请号：JP3791182

    申请日：1982-03-12

    Applicant: TORAY INDUSTRIES

    Inventor： HATADA KENJI ,  MIYAJIMA OSAMU ,  KOBAYASHI HIROAKI

    IPC: C08J7/00 ,  B29C59/14

    Abstract: PURPOSE:In subjecting the inner face of a plastic tube in a pipe of an electrical insulating material, to stabilize electrical discharge and to carry out electrical discharge treatment effectively, by setting the difference between the inner diameter of the pipe of an electrical insulating material and the outer diameter of the plastic tube in a specific range. CONSTITUTION:The plastic tube 1 is inserted into the glass pipe 2 having a different inner diameter, which is evacuated from the exhaust system 9, and CO gas is introduced into it from the gas feed system 10. A voltage of >=50kHz-

    SURFACE MODIFICATION OF POLYMERIC RESIN
    8.
    发明专利
    SURFACE MODIFICATION OF POLYMERIC RESIN 失效

    公开(公告)号：JPH01146930A

    公开(公告)日：1989-06-08

    申请号：JP30678887

    申请日：1987-12-03

    Applicant: TORAY INDUSTRIES

    Inventor： HATADA KENJI ,  MIYAJIMA OSAMU

    IPC: C08J7/00

    Abstract: PURPOSE:To impart good heat sealability and adhesiveness to a polymeric resin, especially, a fluorocarbon resin molding, by exposing the surface of the polymeric resin to a specified discharge in a gas atmosphere containing a specified paraffinic hydrocarbon. CONSTITUTION:In modifying the surface of a polymeric resin, this surface is exposed to a discharge which is generated and maintained by application of a high voltage and does not form any plasma polymer in a gas atmosphere containing a gas of a compound of CnH2n+2 (wherein n is 1-8). Although said polymeric resin may be any polymeric resin, a fluorocarbon resin is desirable from its marked modification effect. Although said polymeric resin may take any form such as a block, a plate, a sheet, a film, a rod or a tube, it is desirably a film.

    FLEXIBLE POLYVINYL CHLORIDE MOLDING
    9.
    发明专利
    FLEXIBLE POLYVINYL CHLORIDE MOLDING 失效

    公开(公告)号：JPS5842628A

    公开(公告)日：1983-03-12

    申请号：JP13981281

    申请日：1981-09-07

    Applicant: TORAY INDUSTRIES

    Inventor： HATADA KENJI ,  MIYAJIMA OSAMU ,  KOBAYASHI HIROAKI

    IPC: C08J7/00 ,  A61M1/16 ,  B29C59/14

    Abstract: PURPOSE:A flexible PVC molding low in plasticizer bleeding, excellent in gas permeability and suitable in the production of tubes for medical use or the like, prepared by using a chlorinated polyolefin as a plasticizer and crosslinking the surface layer by a low-temperature plasma treatment or the like. CONSTITUTION:A flexible vinyl chloride resin is produced by using, as a plasticizer, a chlorinated polyolefin (e.g., chlorinated polyethylene) having a chlorination degree of preferably 10-60%. Then this vinyl chloride resin is formed into a molding such as a tube or a sheet. The surface layer of the polyvinyl chloride molding is dechlorinated by a low-temperature plasma treatment or the like, and crosslinked two prevent bleeding of additives. The chlorinated polyolefin contributes to crosslinking of the surface layer and at the same time the chlorinated polyolefin has excellent gas permeability, so that the obtained molding is low in bleeding of plasticizer and excellent in gas permeability.

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