JP2791775B2 - Nonwoven fabric wound type cartridge filter - Google Patents

Nonwoven fabric wound type cartridge filter

Info

Publication number
JP2791775B2
JP2791775B2 JP63125473A JP12547388A JP2791775B2 JP 2791775 B2 JP2791775 B2 JP 2791775B2 JP 63125473 A JP63125473 A JP 63125473A JP 12547388 A JP12547388 A JP 12547388A JP 2791775 B2 JP2791775 B2 JP 2791775B2
Authority
JP
Japan
Prior art keywords
nonwoven fabric
cartridge filter
fiber diameter
average
wound
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.)
Expired - Lifetime
Application number
JP63125473A
Other languages
Japanese (ja)
Other versions
JPH01297113A (en
Inventor
久雄 今井
健一 甲田
悦郎 中尾
弘 手塚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NIPPON BAIRIIN KK
TOYO ROSHI KK
Original Assignee
NIPPON BAIRIIN KK
TOYO ROSHI KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NIPPON BAIRIIN KK, TOYO ROSHI KK filed Critical NIPPON BAIRIIN KK
Priority to JP63125473A priority Critical patent/JP2791775B2/en
Publication of JPH01297113A publication Critical patent/JPH01297113A/en
Application granted granted Critical
Publication of JP2791775B2 publication Critical patent/JP2791775B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
    • B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
    • 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
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/0604—Arrangement of the fibres in the filtering material
    • B01D2239/0622—Melt-blown
    • 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
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/069—Special geometry of layers
    • B01D2239/0695—Wound layers
    • 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
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1233—Fibre diameter

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Materials (AREA)

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は液体中の固形物を除去するために使用される
濾過用カートリッジフィルター、特に不織布巻込積層型
カートリッジフィルターに関するものである。Description: FIELD OF THE INVENTION The present invention relates to a cartridge filter for filtration used for removing solid matter in a liquid, and more particularly to a non-woven fabric wound-in layered cartridge filter.

（従来の技術及びその問題点） 液体中の微粒子を濾過するカートリッジフィルターと
しては、糸、紐、紙、不織布等を多孔円筒状に成型した
ものが公知である。しかしこれらは抵抗が高く、流量が
とれない、濾過精度が悪い、濾過寿命が短かいなどの性
能に欠点があり改善が望まれていた。又バインダーや接
着剤を使用したカートリッジフィルターの場合、離脱
物、溶出物が多く、バインダーや接着剤を、使用してい
ないと言われるポリプロピレン製ワインドカートリッジ
フィルターも、糸を紡糸する際や撚糸する際に油剤を用
いるため、溶出がみられる欠点があり改善が望まれてい
た。(Prior art and its problems) As a cartridge filter for filtering fine particles in a liquid, a cartridge filter formed by forming a thread, string, paper, nonwoven fabric, or the like into a porous cylindrical shape is known. However, these have drawbacks in performance such as high resistance, inability to obtain a flow rate, poor filtration accuracy, and short filtration life, and thus improvement has been desired. Also, in the case of cartridge filters using binders and adhesives, there are many detached and eluted substances, and polypropylene wind cartridge filters, which are said to use no binder or adhesive, are also used when spinning or twisting yarn. The use of an oil agent has the drawback of elution, and improvement has been desired.

（課題を解決するための手段） 本発明者らはこれらの欠点をなくすため、鋭意研究を
重ねた結果、粗密ムラと繊維径分布にバラツキをもたせ
た微細繊維径不織布を筒巻状に巻回し、積層化すること
によって本発明を完成した。即ち、本発明はメルトブロ
ープロセスで作られた平均繊維径0.5〜50μｍ、平均見
かけ密度0.03〜0.2g/cm3を有し、厚み比0.4以上、繊維
径比1.5以上で、かつ平均繊維径及び平均孔径の異なる
複数の不織布を、巻回すべき筒の外側になる程平均繊維
径及び平均孔径が大きくなるように、順次複数層巻回し
てなることを特徴とする不織布巻込積層型カートリッジ
フィルターを要旨とする。(Means for Solving the Problems) In order to eliminate these drawbacks, the present inventors have conducted intensive studies, and as a result, wound a nonwoven fabric having a fine fiber diameter with unevenness in density and unevenness and a variation in fiber diameter distribution in a cylindrical shape. The present invention was completed by stacking. That is, the present invention has an average fiber diameter of 0.5 to 50 μm, an average apparent density of 0.03 to 0.2 g / cm 3 produced by a melt blow process, a thickness ratio of 0.4 or more, a fiber diameter ratio of 1.5 or more, and an average fiber diameter and average A nonwoven fabric-wound laminated cartridge filter characterized in that a plurality of nonwoven fabrics having different pore diameters are sequentially wound in a plurality of layers such that the average fiber diameter and the average pore size become larger as the outside of the cylinder to be wound becomes larger. And

本発明のカートリッジフィルターに用いられる不織布
は、メルトブロープロセスにおいて、その繊維流を駆動
中の一対のロール間に噴きつけることにより形成され
る。高速繊維流をそれよりも速度の遅いロールとロール
の間に集積することにより、狭い間隙に繊維流が押し込
まれる状態となり、不織布の断面において交絡した長繊
維が厚み方向に交差して積層された粗密ムラのある不織
布が得られる。更に紡糸オリフィスとロールとの距離が
20〜80cmの範囲で実施する事により、繊維交絡及び繊維
径分布の点でより不均一なものが得られる。距離が大き
くなればなるほど繊維流の乱れが大きくなって、繊維交
絡が増し、より不均一な繊維集合体及び幅広い繊維径分
布をもたらす。好ましい距離は、20〜80cmで20cm未満で
あると繊維接着がひどくもろくて硬い不織布が得られ、
加工上又、濾過性能上（目詰りが早く）好ましくない。
又、80cmを超えても不均一性の効果はほとんど変らな
い。集積装置としては一対のロール間又は一対のコンベ
ヤー間又はロールとコンベヤー間のいづれを使用しても
同じ効果が得られる。The nonwoven fabric used in the cartridge filter of the present invention is formed by spraying the fiber stream between a pair of driven rolls in a melt blowing process. By accumulating the high-speed fiber flow between the rolls with lower speeds, the fiber flow was pushed into the narrow gap, and the entangled long fibers crossed in the thickness direction in the cross section of the nonwoven fabric and were laminated. A nonwoven fabric having uneven density can be obtained. Furthermore, the distance between the spinning orifice and the roll
By performing the treatment in the range of 20 to 80 cm, a more non-uniform fiber entanglement and fiber diameter distribution can be obtained. The greater the distance, the greater the turbulence in the fiber flow, the greater the fiber entanglement, resulting in a more uneven fiber aggregate and a wider fiber diameter distribution. The preferred distance is 20 to 80 cm, and if less than 20 cm, the fiber adhesion is extremely brittle and a hard nonwoven fabric is obtained,
It is not preferable in terms of processing and filtration performance (fast clogging).
The effect of the non-uniformity hardly changes even if it exceeds 80 cm. The same effect can be obtained by using any one of a pair of rolls, a pair of conveyors, or a roll and a conveyor.

繊維流及びロールの速度、ロール間の距離、ロールの
形状、集積角度（噴きつけ角度）は、任意に設定するこ
とができ、特に限定されるものではない。The fiber flow and the speed of the rolls, the distance between the rolls, the shape of the rolls, and the accumulation angle (spray angle) can be arbitrarily set, and are not particularly limited.

又、本発明において用いる不織布の「粗密ムラ」「繊
維径分布」を、数量的に表現するために、それぞれ「厚
み比」「繊維径比」なる概念を用いた。Also, in order to quantitatively express the “roughness / density unevenness” and “fiber diameter distribution” of the nonwoven fabric used in the present invention, the concepts of “thickness ratio” and “fiber diameter ratio” were used.

厚みの測定は、不織布製造の際の幅方向の任意の位置
で、流れ方向に等間隔（10mm間隔）にマイクロメーター
を用いて測定を行い求めた。 The thickness was measured at an arbitrary position in the width direction at the time of manufacturing the nonwoven fabric by using a micrometer at equal intervals (10 mm intervals) in the flow direction.

繊維径の測定は、測定しようとする不織布濾材の電顕
写真上にタテ，ヨコ等間隔（10mm間隔）に直線を引き、
それぞれの線と交わる繊維の径を1/100mmの精度のノギ
スで測定し、写真倍率より繊維径を測定する。 To measure the fiber diameter, draw a straight line at equal intervals in the vertical and horizontal directions (10 mm intervals)
The diameter of the fiber crossing each line is measured with a vernier caliper with a precision of 1/100 mm, and the fiber diameter is measured from the photographic magnification.

これらの不織布を、巻回すべき多孔性コアの外層にな
る程、繊維径及び孔径が大きくなる様に、該多孔性コア
の周囲の内層から巻回し、積層化したカートリッジフィ
ルターは、粗密ムラにより通液抵抗が低く、流量を大き
くとれ、外層からの前濾過効果も有り濾過寿命が長い。
又すでに孔径の定まっている不織布を巻いているため、
濾過精度が正確で、離脱繊維が少なく、不織布を製造す
る際に油剤を一切使用していないので溶出が少ないなど
の点に特徴がある。不織布の原料はポリオレフィン、ポ
リアミド、ポリエステル等熱可塑性樹脂を使用する。そ
して、多孔性コアと共にポリプロピレン樹脂を使用した
場合、全ポリプロピレン樹脂製カートリッジフィルター
を構成することを特徴とし、バインダーや接着剤は一切
使用していないため、耐薬品性、溶出物等の問題がない
のみならず、オートクレーブ滅菌も可能で、且つ、常用
温度90℃まで耐え食品衛生面でも優れている点に特徴が
ある。本発明のカートリッジフィルターの構造を第１〜
第３図に示す。図において１は多孔性コア、２は不織布
（濾材）、３はエンドキャップ、４は多孔網筒である。These nonwoven fabrics are wound from the inner layer around the porous core so that the fiber diameter and the pore diameter become larger as the outer layer becomes the outer layer of the porous core to be wound. Low liquid resistance, large flow rate, pre-filtration effect from outer layer and long filtration life.
In addition, since the nonwoven fabric with a fixed pore diameter is already wound,
It is characterized in that the filtration accuracy is accurate, the amount of detached fibers is small, and no elution is used because no oil agent is used when producing the nonwoven fabric. As a raw material of the nonwoven fabric, a thermoplastic resin such as polyolefin, polyamide, or polyester is used. When a polypropylene resin is used together with the porous core, a cartridge filter made of an all-polypropylene resin is characterized. Since no binder or adhesive is used, there is no problem such as chemical resistance and elution. Not only that, it can be sterilized in an autoclave and can withstand a normal temperature of 90 ° C. and is excellent in food hygiene. The structure of the cartridge filter of the present invention is first to first.
As shown in FIG. In the figure, 1 is a porous core, 2 is a nonwoven fabric (filter medium), 3 is an end cap, and 4 is a porous mesh tube.

したがって第１図及び第２図は筒の外側になる程、繊
維径、孔径の大きくなるように内層から多孔性コア１
に、不織布２を巻回した濾過体である。又、第３図はカ
ートリッジフィルターの一部破断斜視図で多孔性コア１
に不織布２を巻き回し、更に濾材を保護するために外部
にポリプロピレン樹脂製多孔網筒４を配し、ポリプロピ
レン樹脂製エンドキャップをカートリッジフィルターの
両端に加熱溶融法によって完全に溶着させたものであ
る。Accordingly, FIGS. 1 and 2 show that the porous core 1 is formed from the inner layer so that the fiber diameter and the pore diameter become larger as the outer side of the cylinder becomes larger.
And a filter body in which the nonwoven fabric 2 is wound. FIG. 3 is a partially cutaway perspective view of the cartridge filter.
In order to further protect the filter medium, a polypropylene resin porous mesh tube 4 is disposed outside, and end caps made of polypropylene resin are completely welded to both ends of the cartridge filter by a heat melting method. .

本発明に係るカートリッジフィルターは、フィルター
ハウジングに設置し、濾過しようとする媒体を外部の多
孔網筒４から濾材を通って内部の多孔性コア１に透過さ
せることにより、液体中の微粒子や微生物を効率よく除
去することができるため、エレクトロニクス分野におけ
る純水、溶剤、化学薬品の濾過や製薬、化粧品業界にお
けるプロセス水、溶剤および中間体製品の濾過に好適に
使用される。The cartridge filter according to the present invention is installed in the filter housing, and allows the medium to be filtered to pass through the filter medium from the external porous mesh tube 4 to the internal porous core 1 to thereby remove fine particles and microorganisms in the liquid. Since it can be efficiently removed, it is suitably used for filtration of pure water, solvents and chemicals in the field of electronics and filtration of process water, solvents and intermediate products in the pharmaceutical and cosmetic industries.

以下、実施例によって本発明の具体例を示す。 Hereinafter, specific examples of the present invention will be described with reference to examples.

実施例 目付70〜90g/m2、厚み600〜900μｍ、密度0.08〜0.13
g/cm3、「厚み比」0.59〜0.79、「繊維径比」1.5〜3.0
の物性値範囲内にあるメルトブロープロセスにより製造
されたポリプロピレン製不織布のうちで、平均繊維径及
び平均孔径の異なる５種類の濾材を筒の外側になる程、
平均繊維径、平均孔径が大きな濾材を各４周づつ巻き回
し、５種類の合計で0.8m2の量を巻込みカートリッジフ
ィルターを作製した。５種の濾材の繊維径、孔径を表１
に示す。Example basis weight 70~90g / m 2, thickness 600～900Myuemu, density 0.08 to 0.13
g / cm 3 , `` thickness ratio '' 0.59 to 0.79, `` fiber diameter ratio '' 1.5 to 3.0
Among the polypropylene non-woven fabrics manufactured by the melt blow process within the physical property value range, the five types of filter media having different average fiber diameters and average pore sizes are located outside the cylinder,
A filter medium having a large average fiber diameter and a large average pore diameter was wound around each of four turns, and a total of five types of 0.8 m 2 was wound therein to produce a cartridge filter. Table 1 shows the fiber diameter and pore diameter of the five filter media.
Shown in

表2,3,4,5に実施例のカートリッジフィルターの通水
抵抗、捕捉効率、濾過寿命、溶出物のデータを記す。 Tables 2, 3, 4, and 5 show data on the water flow resistance, trapping efficiency, filtration life, and eluate of the cartridge filters of the examples.

比較例−１ 市販のポリプロピレン製ワインドカートリッジ（公称
10μｍ）の通水抵抗、捕捉効率、濾過寿命、溶出物を表
2,3,4,5に示す。Comparative Example-1 Commercially available polypropylene wind cartridge (nominal
10μm), water flow resistance, trapping efficiency, filtration life, and eluate
Shown in 2,3,4,5.

比較例−２ 市販のノーバインダーで熱接着性繊維を使用した一体
構造のカートリッジフィルター（公称10μｍ）の通水抵
抗、捕捉効率、濾過寿命、溶出物を表2,3,4,5に示す。Comparative Example 2 Tables 2, 3, 4, and 5 show the water flow resistance, trapping efficiency, filtration life, and eluate of a cartridge filter (nominal 10 μm) having a commercially available no-binder and using a heat-adhesive fiber and having an integral structure.

前記表５において、ΔpHは日本薬局方（1986）の輸液
用プラスチック容器試験法に準じて行われる溶出物試験
において、試験液と空試験液とのpH値の差を示す（財団
法人 日本公定書協会，株式会社 廣川書店 発行，第
十一改正日本薬局方解説書 1986 Ｂ−398 （７）溶
出物試験の項参照）。In Table 5 above, ΔpH indicates the difference between the pH value of the test solution and the pH value of the blank test solution in an eluate test performed in accordance with the plastic container test method for infusions of the Japanese Pharmacopoeia (1986). Association, published by Hirokawa Shoten Co., Ltd., 11th revised edition of the Japanese Pharmacopoeia, 1986 B-398 (7) Refer to (7) Dissolution test).

表2,3,4,5によると実施例は比較例−1,−２と比較し
て効率が高く、抵抗が低く、寿命が長く、濾過性能面に
おいて優れ、溶出物も少なくクリーン性においても優れ
る事が判る。According to Tables 2, 3, 4, and 5, the examples are higher in efficiency, lower in resistance, longer in life, superior in filtration performance, less in leaching, and cleaner in comparison with Comparative Examples -1 and -2. It turns out that it is excellent.

（発明の効果） 本発明によれば、低抵抗で、粒子の捕捉効率が高く、
濾過寿命が長く、そのうえ、クリーン性に富んでいるカ
ートリッジフィルターを提供することができる。 (Effects of the Invention) According to the present invention, low resistance, high particle capture efficiency,
It is possible to provide a cartridge filter having a long filtration life and a high cleanliness.

【図面の簡単な説明】[Brief description of the drawings]

第１図及び第２図はこの発明の一実施例の製造説明図、
第３図はそれによって得られたカートリッジフィルター
の一部破断斜視図である。FIG. 1 and FIG. 2 are explanatory views of the production of an embodiment of the present invention,
FIG. 3 is a partially cutaway perspective view of the cartridge filter obtained thereby.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 手塚 弘 滋賀県守山市勝部町1128 (56)参考文献 特開 昭60−216818（ＪＰ，Ａ) 特開 昭59−26561（ＪＰ，Ａ) 実開 昭54−101576（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) B01D 39/00 - 39/20────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Tezuka 1128, Katsube-cho, Moriyama City, Shiga Prefecture (56) References JP-A-60-216818 (JP, A) JP-A-59-26561 (JP, A) 54-101576 (JP, U) (58) Fields investigated (Int. Cl. 6 , DB name) B01D 39/00-39/20

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】メルトブロープロセスで作られた平均繊維
径0.5〜50μｍ、平均見かけ密度0.03〜0.2g/cm3を有
し、厚み比0.4以上、繊維径比1.5以上で、かつ平均繊維
径及び平均孔径の異なる複数の不織布を、巻回すべき筒
の外側になる程平均繊維径及び平均孔径が大きくなるよ
うに、順次複数層巻回してなることを特徴とする不織布
巻込積層型カートリッジフィルター。Claims: 1. An average fiber diameter of 0.5 to 50 μm, an average apparent density of 0.03 to 0.2 g / cm 3 , a thickness ratio of 0.4 or more, a fiber diameter ratio of 1.5 or more, and an average fiber diameter and average A nonwoven fabric-wound laminated cartridge filter, wherein a plurality of nonwoven fabrics having different pore diameters are sequentially wound so that the average fiber diameter and the average pore diameter become larger as the outer side of the cylinder to be wound becomes larger.
JP63125473A 1988-05-23 1988-05-23 Nonwoven fabric wound type cartridge filter Expired - Lifetime JP2791775B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63125473A JP2791775B2 (en) 1988-05-23 1988-05-23 Nonwoven fabric wound type cartridge filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63125473A JP2791775B2 (en) 1988-05-23 1988-05-23 Nonwoven fabric wound type cartridge filter

Publications (2)

Publication Number Publication Date
JPH01297113A JPH01297113A (en) 1989-11-30
JP2791775B2 true JP2791775B2 (en) 1998-08-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP63125473A Expired - Lifetime JP2791775B2 (en) 1988-05-23 1988-05-23 Nonwoven fabric wound type cartridge filter

Country Status (1)

Country Link
JP (1) JP2791775B2 (en)

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EP0622101B1 (en) * 1993-04-30 1998-07-29 Chisso Corporation Cylindrical filter and process for producing the same
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