JP6695420B2 - 液体フィルター用ろ材および液体フィルター - Google Patents
液体フィルター用ろ材および液体フィルター Download PDFInfo
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- JP6695420B2 JP6695420B2 JP2018505373A JP2018505373A JP6695420B2 JP 6695420 B2 JP6695420 B2 JP 6695420B2 JP 2018505373 A JP2018505373 A JP 2018505373A JP 2018505373 A JP2018505373 A JP 2018505373A JP 6695420 B2 JP6695420 B2 JP 6695420B2
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- fiber
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Classifications
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- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
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- D21H13/12—Organic non-cellulose fibres from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H13/14—Polyalkenes, e.g. polystyrene polyethylene
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H13/24—Polyesters
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- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
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- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H13/26—Polyamides; Polyimides
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
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- D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
- D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
- D21H15/10—Composite fibres
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/08—Filter paper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
- B01D2239/0216—Bicomponent or multicomponent fibres
- B01D2239/0233—Island-in-sea
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/0604—Arrangement of the fibres in the filtering material
- B01D2239/0618—Non-woven
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D2239/08—Special characteristics of binders
- B01D2239/086—Binders between particles or fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D2239/12—Special parameters characterising the filtering material
- B01D2239/1208—Porosity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2239/12—Special parameters characterising the filtering material
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D2239/12—Special parameters characterising the filtering material
- B01D2239/1291—Other parameters
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- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
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- D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
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- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/30—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polycondensation products not covered by indexing codes D10B2331/02 - D10B2331/14
- D10B2331/301—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polycondensation products not covered by indexing codes D10B2331/02 - D10B2331/14 polyarylene sulfides, e.g. polyphenylenesulfide
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- D—TEXTILES; PAPER
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- Nonwoven Fabrics (AREA)
- Filtration Of Liquid (AREA)
- Paper (AREA)
Description
形成性熱可塑性ポリマーに対する溶解速度比が100以上(好ましくは300〜3000)であると、島分離性が良好となり好ましい。溶解速度が200倍未満の場合には、繊維断面中央部の海成分を溶解する間に、分離した繊維断面表層部の島成分が、繊径が小さいために溶解されるため、海相当分が減量されているにもかかわらず、繊維断面中央部の海成分を完全に溶解除去できず、島成分の太さ斑や島成分自体の溶剤侵食につながり、均一な繊維径の繊維が得られないおそれがある。
浴比(%)=(繊維質量(gr)/アルカリ水溶液質量(gr)×100)
また、アルカリ減量加工の処理時間は5〜60分であることが好ましく、さらには10〜30分であることが好ましい。5分未満ではアルカリ減量が不十分となるおそれがある。一方、60分以上では島成分までも減量されるおそれがある
また、アルカリ減量加工において、アルカリ濃度は2〜10%であることが好ましい。2%未満では、アルカリ不足となり、減量速度が極めて遅くなるおそれがある。一方、10%を越えるとアルカリ減量が進みすぎ、島部分まで減量されるおそれがある。
(1)繊維径
透過型電子顕微鏡TEM(測長機能付)を使用し、倍率30000倍で繊維断面写真を撮影し測定した。ただし、繊維径は、単繊維横断面におけるその外接円の直径を用いた(n数5の平均値)。
(2)繊維長
走査型電子顕微鏡(SEM)により、海成分溶解除去前の極細短繊維(短繊維A)を基盤上に寝かせた状態とし、20〜500倍で繊維長Lを測定した(n数5の平均値)。その際、SEMの測長機能を活用して繊維長Lを測定した。
(3)目付け
JIS P8124(紙のメートル坪量測定方法)に基づいて目付けを測定した。
(4)厚さ
JIS P8118(紙及び板紙の厚さと密度の測定方法)に基づいて厚みを測定した。測定荷重は75g/cm2にて、n=5で測定し、平均値を求めた。
(5)空隙率
上記目付け、厚さ、繊維密度から下記式にて計算した。なお、ポリエチレンテレフタレート(PET)繊維の繊維密度は1.36g/cm3である。
空隙率(%)=100−((目付け)/(厚さ)/繊維密度×100)
(6)引張強度
JIS P8113 (紙および板紙の引張強さと試験方法)に基づいて実施した。
(7)平均孔径
PMI社製パームポロメーターにより測定した。
(8)ガーレ透気度
JIS P8117 (紙および板紙の透気度試験方法)に基づいて実施した。
(8)溶融粘度
乾燥処理後のポリマーを紡糸時のルーダー温度に設定したオリフィスにセットして5分間溶融保持したのち、数水準の荷重をかけて押し出し、そのときのせん断速度と溶融粘度をプロットする。そのデータをもとに、せん断速度−溶融粘度曲線を作成し、せん断速度が1000sec−1の時の溶融粘度を読み取った。
(9)アルカリ減量速度比
海成分および島成分のポリマーを、それぞれ、径0.3mm、長さ0.6mmの円孔を24孔持つ口金から吐出し、1000〜2000m/分の紡糸速度で引き取って得た未延伸糸を残留伸度が30〜60%の範囲となるように延伸して83dtex/24フィラメントのマルチフィラメントを作製した。これを1.5wt%NAOH(水酸化ナトリウム)水溶液80℃を用い、浴比100として、溶解時間と溶解量から減量速度を算出した。
島成分に285℃での溶融粘度が120Pa・secのポリエチレンテレフタレート(PET)、海成分に285℃での溶融粘度が135Pa・secである平均分子量4000のポリエチレングリコールを4重量%、5−ナトリウムスルホイソフタル酸を9mol%共重合した改質ポリエチレンテレフタレートを使用し、海:島=10:90の重量比率で島数400の口金を用いて紡糸し、紡糸速度1500m/分で引き取った。アルカリ減量速度差は1000倍であった。これを3.9倍に延伸した後、ギロチンカッターで0.5mmにカットして、海島型複合繊維を得た。これを4%NaOH水溶液で75℃にて10%減量し、本繊維を主体繊維1とした(延伸されたポリエステル繊維、繊維径700nm、繊維長0.5mm、アスペクト比714、丸断面、複屈折率Δnが0.05より大)。
島成分に285℃での溶融粘度が120Pa・secのポリエチレンテレフタレート、海成分に285℃での溶融粘度が135Pa・secである平均分子量4000のポリエチレングリコールを4重量%、5−ナトリウムスルホイソフタル酸を9mol%共重合した改質ポリエチレンテレフタレートを使用し、海:島=10:90の重量比率で島数400の口金を用いて紡糸し、紡糸速度1500m/分で引き取った。アルカリ減量速度差は1000倍であった。これを3.9倍に延伸した後、ギロチンカッターで0.4mmにカットして、海島型複合繊維を得た。これを4%NaOH水溶液で75℃にて10%減量し、本繊維を主体繊維2とした(延伸されたポリエステル繊維、繊維径400nm、繊維長0.4mm、アスペクト比1000、丸断面、複屈折率Δnが0.05より大)。
ポリエチレンテレフタレートを常法により紡糸・延伸して得られた延伸ポリエステル繊維を用意し主体繊維3とした(単繊維繊度0.1dtex、繊維径3.05μm、繊維長3mm、アスペクト比983、丸断面、複屈折率Δnが0.05より大)。
実施例1と同じ主体繊維1(30wt%)と実施例2と同じ主体繊維2(30wt%)と実施例3と同じ主体繊維3(20wt%)と実施例1と同じバインダー主体繊維1(20wt%)を混合撹拌した後、実施例1と同様にしてフィルター用ろ材を作製した。評価結果を表1に示す。
島成分に295℃での溶融粘度が130Pa・secのポリフェニレンスルフィド(PPS)、海成分に295℃での溶融粘度が145Pa・secである平均分子量4000のポリエチレングリコールを4重量%、5−ナトリウムスルホイソフタル酸を9mol%共重合した改質ポリエチレンテレフタレートを使用し、海:島=30:70の重量比率で島数400の口金を用いて紡糸し、紡糸速度1500m/分で引き取った。アルカリ減量速度差は1000倍であった。これを3.5倍に延伸した後、ギロチンカッターで0.5mmにカットして、海島型複合繊維を得た。これを4%NaOH水溶液で75℃にて10%減量し、本繊維を主体繊維4とした(延伸されたポリフェニレンスルフィド繊維、繊維径700nm、繊維長0.5mm、アスペクト比714、丸断面、複屈折率Δnが0.05より大)。
島成分に285℃での溶融粘度が125Pa・secのナイロン6(Ny−6)、海成分に285℃での溶融粘度が135Pa・secである平均分子量4000のポリエチレングリコールを4重量%、5−ナトリウムスルホイソフタル酸を9mol%共重合した改質ポリエチレンテレフタレートを使用し、海:島=30:70の重量比率で島数800の口金を用いて紡糸し、紡糸速度1500m/minで引き取った。アルカリ減量速度差は1000倍以上であった。これを3.2倍に延伸した後、ギロチンカッターで0.5mmにカットして、海島型複合繊維を得た。これを4%NaOH水溶液で75℃にて10%減量し、本繊維を主体繊維5とした(延伸されたナイロン6繊維、繊維径400nm、繊維長0.5mm、アスペクト比714、丸断面、複屈折率Δnが0.05より大)。
表1に示すように、主体繊維とバインダー繊維を選択し混合撹拌した後、実施例1と同様にしてフィルター用ろ材を作製した。評価結果を表1に示す。
2:ろ材
3:プロテクター
Claims (7)
- 液体フィルター用ろ材であって、
繊維径が4.0μm以下かつアスペクト比が100〜2500の主体繊維と、繊維径が3.0μm以下かつアスペクト比が100〜2500で伸度100%以上のバインダー繊維を含み、かつ前記バインダー繊維の重量比率がろ材重量に対して10〜50重量%であり、かつ目付けが5〜80g/m2、厚さが10〜100μmの範囲内であり、引張伸度がMD方向10%以上、かつCD方向10%以上であり、前記主体繊維がポリフェニレンスルフィド繊維またはポリオレフィン繊維またはナイロン繊維からなることを特徴とする液体フィルター用ろ材。 - 前記バインダー繊維が、複合繊維または未延伸繊維からなる、請求項1に記載の液体フィルター用ろ材。
- 液体フィルター用ろ材が湿式不織布からなる、請求項1または請求項2に記載の液体フィルター用ろ材。
- 空隙率が50〜90%の範囲内である、請求項1〜3のいずれかに記載の液体フィルター用ろ材。
- 引張強度がMD方向8N/15mm以上、かつCD方向3N/15mm以上である、請求項1〜4のいずれかに記載の液体フィルター用ろ材。
- 平均孔径が2.0μm以下である、請求項1〜5のいずれかに記載の液体フィルター用ろ材。
- 請求項1〜6のいずれかに記載の液体フィルター用ろ材を用いてなり、かつカートリッジ型である、液体フィルター。
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PCT/JP2017/006055 WO2017159216A1 (ja) | 2016-03-15 | 2017-02-20 | 液体フィルター用ろ材および液体フィルター |
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US11253801B2 (en) * | 2015-11-19 | 2022-02-22 | Teijin Frontier Co., Ltd. | Filter cloth for bag filter, method for producing the same, and bag filter |
EP3760777B1 (en) * | 2018-02-28 | 2023-01-18 | Zeon Corporation | Nonwoven fabric and filter |
JP7148280B2 (ja) * | 2018-06-04 | 2022-10-05 | 帝人フロンティア株式会社 | 湿式不織布 |
JP6662423B1 (ja) * | 2018-09-06 | 2020-03-11 | 日本製紙株式会社 | リグニンを分離する方法 |
CN109162142B (zh) * | 2018-09-14 | 2021-09-03 | 天津工业大学 | 一种管式膜无纺基布及其制备方法 |
CN108893867A (zh) * | 2018-09-14 | 2018-11-27 | 天津工业大学 | 一种管式膜用聚酰亚胺无纺布的制备方法 |
JP2020050970A (ja) * | 2018-09-25 | 2020-04-02 | ユニチカ株式会社 | ポリエステル系長繊維不織布 |
JP7232617B2 (ja) * | 2018-10-24 | 2023-03-03 | 三菱製紙株式会社 | ポリフェニレンサルファイド繊維含有湿式不織布 |
JP2020139243A (ja) * | 2019-02-28 | 2020-09-03 | 東レ株式会社 | メルトブロー不織布 |
WO2020261882A1 (ja) * | 2019-06-26 | 2020-12-30 | パナソニックIpマネジメント株式会社 | 水処理用濾過装置 |
CN114616369A (zh) * | 2019-11-01 | 2022-06-10 | 帝人富瑞特株式会社 | 电池间隔件用无纺布和电池间隔件 |
CN111285702A (zh) * | 2020-02-20 | 2020-06-16 | 山东工业陶瓷研究设计院有限公司 | 陶瓷纤维过滤膜材料及制备方法 |
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JP2014159033A (ja) | 2014-05-26 | 2014-09-04 | Asahi Kasei Fibers Corp | 高分離性液体フィルター |
DE202015105210U1 (de) * | 2015-10-02 | 2016-11-03 | Ahlstrom Corp. | Filtermedium mit hoher Hitzebeständigkeit |
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US20190070540A1 (en) | 2019-03-07 |
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