SEMIPERMEABLE MEMBRANE SUPPORTING BODY AND MANUFACTURING METHOD OF THE SAME

To provide a semipermeable membrane supporting body which has fewer semipermeable membrane defects and improves salt rejection rate.SOLUTION: A semipermeable membrane supporting body made of a wet-laid nonwoven fabric containing a main synthetic fiber and a binder synthetic fiber is given in which s...

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Bibliographische Detailangaben
Hauptverfasser:	MIYAGI KEISUKE, NOGAMI YURI, ESUMI SHINICHI, YOSHIDA MITSUO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	IMPREGNATING OR COATING OF PAPER PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRODUCTION OF CELLULOSE PULP COMPOSITIONS SEPARATION TEXTILES TRANSPORTING TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G
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Beschreibung
Zusammenfassung:	To provide a semipermeable membrane supporting body which has fewer semipermeable membrane defects and improves salt rejection rate.SOLUTION: A semipermeable membrane supporting body made of a wet-laid nonwoven fabric containing a main synthetic fiber and a binder synthetic fiber is given in which separated fibers are 30 fibers or less in the tape peeling test, and the level difference of a core part obtained by measuring surface roughness of a coated surface where the semipermeable membrane is arranged with a confocal laser microscope is 14 μm or less.SELECTED DRAWING: None 【課題】本発明の課題は、半透膜の欠点が少なく、塩阻止率が向上する半透膜支持体を提供することである。【解決手段】主体合成繊維とバインダー合成繊維とを含有する湿式不織布からなる半透膜支持体において、テープ剥離試験での離脱繊維が３０本以下であり、かつ共焦点レーザー顕微鏡によって半透膜が設けられる塗布面の表面粗さを測定して得られるコア部のレベル差が１４μｍ以下であることを特徴とする半透膜支持体。【選択図】なし