WET PROCESS NONWOVEN FABRIC AND PROCESS FOR PRODUCING THE SAME

A wet-process nonwoven fabric constituted of inorganic fibers including bundled inorganic fibers and a binder ingredient with which the fibers are bonded, wherein the average number of fibers per bundle is 1.5 to 20 and the nonwoven fabric has a section in which the average value of Z/X which is rep...

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Bibliographische Detailangaben
Hauptverfasser:	NISHIKORI YOSHIHARU, TERAO TOMOYUKI
Format:	Patent
Sprache:	eng
Schlagworte:	CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS IMPREGNATING OR COATING OF PAPER MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRINTED CIRCUITS PRODUCTION OF CELLULOSE PULP COMPOSITIONS TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TEXTILES TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G
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Beschreibung
Zusammenfassung:	A wet-process nonwoven fabric constituted of inorganic fibers including bundled inorganic fibers and a binder ingredient with which the fibers are bonded, wherein the average number of fibers per bundle is 1.5 to 20 and the nonwoven fabric has a section in which the average value of Z/X which is represented by (the number of fibers in each bundle which are disposed adjacently in the thickness direction)/(the number of fibers in each bundle which are disposed adjacently in the plane direction) (average Z/X value) is 0.9 or lower; and a wet process for producing a nonwoven fabric which comprises: a step in which inorganic fibers are dispersed in an aqueous medium in the presence of an anionic dispersion stabilizer; a step in which a cationic compound is added to the resultant fiber dispersion to bundle fibers to produce a fiber dispersion containing fiber bundles; a step in which the resultant fiber dispersion containing fiber bundles is formed into a sheet by a wet papermaking method; and a step in which a binder is applied to the sheet obtained. This nonwoven fabric is a nonwoven inorganic-fiber fabric having a high density.