FILTER MEDIUM FOR LIQUID FILTER AND MANUFACTURING METHOD THEREOF

To provide a filter medium for a liquid filter which is superior in filtration performance and pleat processability, and in which pressure loss hardly increases.SOLUTION: In a filter medium for a liquid filter, a melt-blown nonwoven fabric composed of fibers with an average fiber diameter of more th...

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Bibliographische Detailangaben
Hauptverfasser:	MIDORIKAWA MASATOSHI, MIYAGI KEISUKE, YOSHIDA MITSUO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	BRAIDING COTTON-WOOL FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS KNITTING LACE-MAKING LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL NON-WOVEN FABRICS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TEXTILES TRANSPORTING TRIMMINGS WADDING
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Beschreibung
Zusammenfassung:	To provide a filter medium for a liquid filter which is superior in filtration performance and pleat processability, and in which pressure loss hardly increases.SOLUTION: In a filter medium for a liquid filter, a melt-blown nonwoven fabric composed of fibers with an average fiber diameter of more than 1.0 μm and equal to or less than 4.0 μm, and a wet type nonwoven fabric composed of thermoplastic fibers with a fiber diameter of 5 μm or more are laminated, and the laminated melt-blown nonwoven fabric and wet type nonwoven fabric are bonded by an embossment fusion point, and an inter-layer delamination strength is 40 mJ or more. The laminated melt-blown nonwoven fabric and wet type nonwoven fabric are bonded using heat embossment processing or ultrasonic embossment processing.SELECTED DRAWING: None 【課題】本発明の課題は、濾過性能及びプリーツ加工性に優れ、圧力損失が上昇し難い液体フィルタ用濾材を提供することにある。【解決手段】平均繊維径が１．０μｍ超４．０μｍ以下の繊維で構成されるメルトブロー不織布と、繊維径が５μｍ以上の熱可塑性繊維からなる湿式不織布とが積層されてなり、積層されたメルトブロー不織布と湿式不織布とがエンボス融着点によって接着されてなり、層間剥離強度が４０ｍＪ以上であることを特徴とする液体フィルタ用濾材であり、積層されたメルトブロー不織布と湿式不織布とを熱エンボス加工又は超音波エンボス加工によって接着する。【選択図】なし