JP2013173078A - 混紡不織布、フィルタ濾材およびフィルタユニット - Google Patents
混紡不織布、フィルタ濾材およびフィルタユニット Download PDFInfo
- Publication number
- JP2013173078A JP2013173078A JP2012037367A JP2012037367A JP2013173078A JP 2013173078 A JP2013173078 A JP 2013173078A JP 2012037367 A JP2012037367 A JP 2012037367A JP 2012037367 A JP2012037367 A JP 2012037367A JP 2013173078 A JP2013173078 A JP 2013173078A
- Authority
- JP
- Japan
- Prior art keywords
- core
- sheath
- fiber
- filter medium
- nonwoven fabric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
【解決手段】フッ素樹脂多孔質膜、および当該フッ素樹脂多孔質膜の少なくとも一方の表面上に積層された通気性支持材を有するフィルタ濾材であって、当該通気性支持材が、芯にポリエステル、鞘にポリオレフィンを用いた芯鞘繊維(A)、ポリエステル繊維(B)、および芯にポリエステル、鞘に共重合ポリエステルを用いた芯鞘繊維(C)を含む混紡不織布であるフィルタ濾材とする。
【選択図】図2
Description
当該通気性支持材が、芯にポリエステル、鞘にポリオレフィンを用いた芯鞘繊維(A)、ポリエステル繊維(B)、および芯にポリエステル、鞘に共重合ポリエステルを用いた芯鞘繊維(C)を含む混紡不織布であるフィルタ濾材である。
芯にポリエステル、鞘にポリオレフィンを用いた芯鞘繊維(A)、ポリエステル繊維(B)、および芯にポリエステル、鞘に共重合ポリエステルを用いた芯鞘繊維(C)を含む混紡不織布である。
当該通気性支持材が、芯にポリエステル、鞘にポリオレフィンを用いた芯鞘繊維(A)、ポリエステル繊維(B)、および芯にポリエステル、鞘に共重合ポリエステルを用いた芯鞘繊維(C)を含む混紡不織布であるフィルタ濾材によってそれを実現した。
空隙率(%)=[1−(b/a×c)]×100
最初に、PTFEファインパウダー(商品名「ポリフロンF−104」、ダイキン工業社製)100重量部に対し、液状潤滑剤として炭化水素油(商品目「アイソパーM」、エッソ石油社製)25重量部を均一に混合した。次に、得られた混合物を圧力20MPaで圧縮予備成形した後、予備成形物をロッド状に押出成形し、さらにこのロッド状の押出成形物を一対の金属ロールを通して圧延して、厚さ0.2mm、幅150mmの帯状のPTFEシートを得た。
実施例1で用いた3成分短繊維混紡不織布の厚さを750μm、目付量を200g/m2、空隙率を80%に変更した以外は実施例1と同様にしてフィルタ濾材を得た。
3成分混紡不織布を、厚さ350μmの3成分積層不織布に変更した以外は、実施例1と同様にしてフィルタ濾材を製造した。3成分積層不織布は、PET/PE芯鞘繊維層(25重量%、繊度2.2dtex、繊維長51mm)、PET繊維層(50重量%、繊度17dtex、繊維長51mm)、PET/イソフタル酸共重合PET芯鞘繊維層(25重量%、繊度2.2dtex、繊維長51mm)を有し、PET/PE芯鞘繊維層が積層された面において、PTFE多孔質膜と熱ラミネートした。3成分混紡不織布の目付量は100g/m2、空隙率は79%とした。
有効面積100cm2の円柱状ホルダーに実施例および比較例のフィルタ濾材をセットし、フィルタ濾材の両面で圧力差を生じさせて当該フィルタ濾材に空気を透過させた。透過する空気の流速を、流量計で5.3cm/sec(流量31.8m3/min)に調整したときの圧力損失を圧力計(マノメータ)で測定した。この測定は、使用した不織布についても行った。また、実施例および比較例のフッ素樹脂多孔質膜と不織布を単に重ね合わせたサンプルについて同様の実験を行った。このサンプルについての測定結果をラミネート前の圧力損失とし、フィルタ濾材の圧力損失の値をラミネート前の圧力損失の値で割ることによって、ラミネート時の圧力損失上昇率を求めた。結果を表1に示す。
2 支持枠
3 フィルタユニット
4 フッ素樹脂多孔質膜
5 混紡不織布
Claims (15)
- フッ素樹脂多孔質膜、および当該フッ素樹脂多孔質膜の少なくとも一方の表面上に積層された通気性支持材を有するフィルタ濾材であって、
当該通気性支持材が、芯にポリエステル、鞘にポリオレフィンを用いた芯鞘繊維(A)、ポリエステル繊維(B)、および芯にポリエステル、鞘に共重合ポリエステルを用いた芯鞘繊維(C)を含む混紡不織布であるフィルタ濾材。 - 前記芯鞘繊維(A)が、芯にポリエチレンテレフタレート、鞘にポリエチレンを用いた芯鞘繊維であり、前記ポリエステル繊維(B)が、ポリエチレンテレフタレート繊維であり、前記芯鞘繊維(C)が、芯にポリエチレンテレフタレート、鞘に共重合ポリエチレンテレフタレートを用いた芯鞘繊維である請求項1に記載のフィルタ濾材。
- 前記混紡不織布に、前記芯鞘繊維(A)が10〜40重量%、前記ポリエステル繊維(B)が20〜80重量%、前記芯鞘繊維(C)が10〜40重量%含有されている請求項1または2に記載のフィルタ濾材。
- 前記芯鞘繊維(A)の繊度が1〜6dtexであり、前記ポリエステル繊維(B)の繊度が6〜25dtexであり、前記芯鞘繊維(C)の繊度が1〜6dtexである請求項1〜3のいずれかに記載のフィルタ濾材。
- 前記混紡不織布の空隙率が65%以上であり、目付量が60g/m2以上である請求項1〜4のいずれかに記載のフィルタ濾材。
- 前記フッ素樹脂多孔質膜が、ポリテトラフルオロエチレン多孔質膜である請求項1〜5のいずれかに記載のフィルタ濾材。
- 前記芯鞘繊維(A)の鞘のポリオレフィンの少なくとも一部が溶融することによって、前記フッ素樹脂多孔質膜と前記混紡不織布とが積層されている請求項1〜6のいずれかに記載のフィルタ濾材。
- 前記フッ素樹脂多孔質膜の、平均孔径が0.01〜100μmであり、空気を流速5.3cm/秒で透過させたときに生じる圧力損失が10〜300Paであり、被濾過気体の流速を5.3cm/秒とし、捕集対象粒子の粒径を0.3〜0.5μmの範囲としたときの捕集効率が60%以上である請求項1〜7のいずれかに記載のフィルタ濾材。
- 請求項1〜8のいずれかに記載のフィルタ濾材を備えたフィルタユニット。
- 掃除機用である請求項9に記載のフィルタユニット。
- フッ素樹脂多孔質膜と、当該フッ素樹脂多孔質膜の少なくとも一方の表面上に積層された通気性支持材とを有するフィルタ濾材における通気性支持材として用いられる混紡不織布であって、
芯にポリエステル、鞘にポリオレフィンを用いた芯鞘繊維(A)、ポリエステル繊維(B)、および芯にポリエステル、鞘に共重合ポリエステルを用いた芯鞘繊維(C)を含む混紡不織布。 - 前記芯鞘繊維(A)が、芯にポリエチレンテレフタレート、鞘にポリエチレンを用いた芯鞘繊維であり、前記ポリエステル繊維(B)が、ポリエチレンテレフタレート繊維であり、前記芯鞘繊維(C)が、芯にポリエチレンテレフタレート、鞘に共重合ポリエチレンテレフタレートを用いた芯鞘繊維である請求項11に記載の混紡不織布。
- 前記芯鞘繊維(A)を10〜40重量%、前記ポリエステル繊維(B)を20〜80重量%、前記芯鞘繊維(C)を10〜40重量%含有する請求項11または12に記載の混紡不織布。
- 前記芯鞘繊維(A)の繊度が1〜6dtexであり、前記ポリエステル繊維(B)の繊度が6〜25dtexであり、前記芯鞘繊維(C)の繊度が1〜6dtexである請求項11〜13のいずれかに記載の混紡不織布。
- 空隙率が65%以上であり、目付量が60g/m2以上である請求項11〜14のいずれかに記載の混紡不織布。
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JP5728113B1 (ja) * | 2014-07-25 | 2015-06-03 | ユニチカ株式会社 | 吸着材 |
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JPWO2019230984A1 (ja) * | 2018-06-01 | 2021-07-01 | 日東電工株式会社 | フィルタ濾材とこれを備えるフィルタユニット |
JPWO2019230983A1 (ja) * | 2018-06-01 | 2021-07-01 | 日東電工株式会社 | フィルタ濾材とこれを備えるフィルタユニット |
JP7356972B2 (ja) | 2018-06-01 | 2023-10-05 | 日東電工株式会社 | フィルタ濾材とこれを備えるフィルタユニット |
JP7356971B2 (ja) | 2018-06-01 | 2023-10-05 | 日東電工株式会社 | フィルタ濾材とこれを備えるフィルタユニット |
JP2021074674A (ja) * | 2019-11-08 | 2021-05-20 | 日本バイリーン株式会社 | 膜支持体 |
WO2022255453A1 (ja) * | 2021-06-04 | 2022-12-08 | ダイキン工業株式会社 | エアフィルタ濾材、プリーツ状濾材、エアフィルタユニット、マスク用濾材、および、エアフィルタ濾材の再生方法 |
JP2022186658A (ja) * | 2021-06-04 | 2022-12-15 | ダイキン工業株式会社 | エアフィルタ濾材、プリーツ状濾材、エアフィルタユニット、マスク用濾材、および、エアフィルタ濾材の再生方法 |
JP7219412B2 (ja) | 2021-06-04 | 2023-02-08 | ダイキン工業株式会社 | エアフィルタ濾材、プリーツ状濾材、エアフィルタユニット、マスク用濾材、および、エアフィルタ濾材の再生方法 |
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US20150013295A1 (en) | 2015-01-15 |
EP2818223B1 (en) | 2017-07-26 |
KR20140125443A (ko) | 2014-10-28 |
EP2818223A1 (en) | 2014-12-31 |
EP2818223A4 (en) | 2015-11-25 |
KR102020696B1 (ko) | 2019-09-10 |
TW201343234A (zh) | 2013-11-01 |
WO2013125205A1 (ja) | 2013-08-29 |
CN104144734A (zh) | 2014-11-12 |
US9289713B2 (en) | 2016-03-22 |
CN104144734B (zh) | 2016-01-20 |
JP5917944B2 (ja) | 2016-05-18 |
TWI568487B (zh) | 2017-02-01 |
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