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1. JP2020108884 - FILTER PLEAT PACK AND AIR FILTER UNIT

Office Japan
Application Number 2019232153
Application Date 23.12.2019
Publication Number 2020108884
Publication Date 16.07.2020
Publication Kind A
CPC
B01D 39/16
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
39Filtering material for liquid or gaseous fluids
14Other self-supporting filtering material ; ; Other filtering material
16of organic material, e.g. synthetic fibres
B01D 46/52
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
46Filters ; , i.e. particle separators; or filtering processes specially modified for separating dispersed particles from gases or vapours
52Particle separators, e.g. dust precipitators, using filters embodying folded ; corrugated or wound sheet; material
B01D 63/14
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
63Apparatus in general for separation processes using semi-permeable membranes
14Pleat-type membrane modules
B01D 69/00
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
69Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
B01D 69/02
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
69Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
02characterised by their properties
B01D 69/10
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
69Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
10Supported membranes; Membrane supports
Applicants NITTO DENKO CORP
日東電工株式会社
Inventors UCHIYAMA SHIHO
内山 志穂
Agents 鎌田 耕一
Priority Data 2018248632 28.12.2018 JP
Title
(EN) FILTER PLEAT PACK AND AIR FILTER UNIT
(JA) フィルタプリーツパック及びエアフィルタユニット
Abstract
(EN)

PROBLEM TO BE SOLVED: To provide a filter pleat pack comprising an air filter medium using a polytetrafluoroethylene (PTFE) porous film, which is suppressed from being deteriorated in trapping efficiency during pleat processing.

SOLUTION: The filter pleat pack is constituted of an air filter medium folded back in a pleat shape, where the air filter medium includes a laminated body of a PTFE porous film and a support material with air permeability. A percentage of contraction of the air filter medium which is determined by a formula (d2-d1)/d2 is 50% or more, where a minimum thickness of the PTFE porous film in a folded-back area of the air filter medium folded back in the pleat shape is defined as d1 and a thickness of the PTFE porous film in a flat area of the air filter medium is defined as d2.

SELECTED DRAWING: Figure 1B

COPYRIGHT: (C)2020,JPO&INPIT

(JA)

【課題】ポリテトラフルオロエチレン(PTFE)多孔質膜を用いたエアフィルタ濾材を備え、プリーツ加工時における捕集効率の低下が抑制されたフィルタプリーツパックを提供する。
【解決手段】プリーツ状に折り畳まれたエアフィルタ濾材から構成され、エアフィルタ濾材はPTFE多孔質膜と通気性支持材との積層体を含み、プリーツ状に折り畳まれたエアフィルタ濾材の折り返し領域におけるPTFE多孔質膜の最小の厚さd1、及びエアフィルタ濾材の平坦領域におけるPTFE多孔質膜の厚さd2から、式(d2−d1)/d2により求められるエアフィルタ濾材の収縮率が50%以上であるフィルタプリーツパックとする。
【選択図】図1B

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