JP2002166114A - Method for manufacturing electret processed article - Google Patents
Method for manufacturing electret processed articleInfo
- Publication number
- JP2002166114A JP2002166114A JP2000368150A JP2000368150A JP2002166114A JP 2002166114 A JP2002166114 A JP 2002166114A JP 2000368150 A JP2000368150 A JP 2000368150A JP 2000368150 A JP2000368150 A JP 2000368150A JP 2002166114 A JP2002166114 A JP 2002166114A
- Authority
- JP
- Japan
- Prior art keywords
- water
- electret
- conductive sheet
- sheet
- producing
- 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
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- -1 polypropylene Polymers 0.000 claims description 15
- 239000000047 product Substances 0.000 claims description 15
- 239000000654 additive Substances 0.000 claims description 14
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 12
- 239000012466 permeate Substances 0.000 claims description 12
- 230000000996 additive effect Effects 0.000 claims description 10
- 239000004744 fabric Substances 0.000 claims description 10
- 239000004750 melt-blown nonwoven Substances 0.000 claims description 9
- 239000003960 organic solvent Substances 0.000 claims description 9
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 7
- 235000019441 ethanol Nutrition 0.000 claims description 6
- 229920002994 synthetic fiber Polymers 0.000 claims description 6
- 239000012209 synthetic fiber Substances 0.000 claims description 6
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical compound C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 claims description 5
- 150000001412 amines Chemical class 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 4
- 229920000098 polyolefin Polymers 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 150000001298 alcohols Chemical class 0.000 claims description 3
- 238000009835 boiling Methods 0.000 claims description 3
- 150000002576 ketones Chemical class 0.000 claims description 3
- 239000012153 distilled water Substances 0.000 claims description 2
- 239000012528 membrane Substances 0.000 claims description 2
- 238000001223 reverse osmosis Methods 0.000 claims description 2
- 238000001035 drying Methods 0.000 description 16
- 239000000835 fiber Substances 0.000 description 9
- 239000000428 dust Substances 0.000 description 8
- OWYWGLHRNBIFJP-UHFFFAOYSA-N Ipazine Chemical compound CCN(CC)C1=NC(Cl)=NC(NC(C)C)=N1 OWYWGLHRNBIFJP-UHFFFAOYSA-N 0.000 description 5
- 238000007654 immersion Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000007602 hot air drying Methods 0.000 description 4
- 239000004745 nonwoven fabric Substances 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 125000004836 hexamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920000747 poly(lactic acid) Polymers 0.000 description 2
- 239000004626 polylactic acid Substances 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- LEVFXWNQQSSNAC-UHFFFAOYSA-N 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-hexoxyphenol Chemical compound OC1=CC(OCCCCCC)=CC=C1C1=NC(C=2C=CC=CC=2)=NC(C=2C=CC=CC=2)=N1 LEVFXWNQQSSNAC-UHFFFAOYSA-N 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- TWIZJXCPYWDRNA-UHFFFAOYSA-N butanedioic acid 1-(2-hydroxyethyl)-2,2,3,5,6,6-hexamethylpiperidin-4-ol Chemical compound C(CCC(=O)O)(=O)O.CC1C(N(C(C(C1O)C)(C)C)CCO)(C)C TWIZJXCPYWDRNA-UHFFFAOYSA-N 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 125000001841 imino group Chemical group [H]N=* 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- YKYONYBAUNKHLG-UHFFFAOYSA-N n-Propyl acetate Natural products CCCOC(C)=O YKYONYBAUNKHLG-UHFFFAOYSA-N 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229940090181 propyl acetate Drugs 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Landscapes
- Nonwoven Fabrics (AREA)
- Filtering Materials (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はエレクトレット加工
品の製造方法に関し、さらに詳しくは、高品質のエレク
トレット加工品を低コストで生産可能にするエレクトレ
ット加工品の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an electret processed product, and more particularly, to a method for manufacturing an electret processed product capable of producing a high quality electret processed product at low cost.
【０００２】[0002]
【従来の技術】従来、低圧損のエアフィルター用材料と
して、エレクトレット加工された繊維シートが優れた性
能を有するため使用されている。このエレクトレット化
繊維シートの製造方法としては、合成繊維不織布等の繊
維シートに高電圧を印加し、コロナ放電によりエレクト
レット化する方法（特開昭６１−１０２４７６号公報等
参照）や、フィルムシートにワイヤ電極により高電圧を
印加し、同じくコロナ放電によりエレクトレット化した
後、そのフィルムシートを繊維化して不織布にする方法
（特公昭５７−１４４６７号公報等参照）などが知られ
ている。2. Description of the Related Art Heretofore, electret-processed fiber sheets have been used as materials for air filters with low pressure loss because of their excellent performance. Examples of a method for producing this electretized fiber sheet include a method of applying a high voltage to a fiber sheet such as a synthetic fiber nonwoven fabric and forming it into an electret by corona discharge (see Japanese Patent Application Laid-Open No. 61-102476), and a method of forming a wire on a film sheet. A method is known in which a high voltage is applied by an electrode, and the film is similarly electretized by corona discharge, and then the film sheet is fiberized into a nonwoven fabric (see Japanese Patent Publication No. 57-14467).
【０００３】しかし、図４に示すように、従来のエレク
トレット化方法は、いずれもアース電極２１の上に高分
子材料シートＳを裁置するか又は移動させながら、その
表面に直流高電圧発生装置２３の高電圧を針状或いはワ
イヤー電極２２から印加し、コロナ放電によりエレクト
レット化するものである。そのため、高電圧印加電極２
２とアース電極２１の間隙精度等によりムラを生じやす
く、エレクトレット化シートに荷電ムラが出来たり、ま
た火花放電によりシートが損傷するという問題があっ
た。However, as shown in FIG. 4, in the conventional electret forming method, a high-voltage DC generator is placed on the surface of a polymer material sheet S while placing or moving the same on a ground electrode 21. A high voltage 23 is applied from a needle-like or wire electrode 22 to form an electret by corona discharge. Therefore, the high voltage application electrode 2
There is a problem that unevenness is apt to occur due to the gap accuracy between the electrode sheet 2 and the ground electrode 21 and the like, and the electretized sheet is charged unevenly and the sheet is damaged by spark discharge.
【０００４】さらに、高電圧設備は一般に高価である上
に、安全維持管理のために費用がかかるため、コスト高
になるという問題があった。In addition, high voltage equipment is generally expensive, and it is expensive for safety maintenance, so that there is a problem that the cost is high.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的は、上記
従来技術の諸問題を解消し、高品質、高性能のエレクト
レット加工品を低コストで生産可能にするエレクトレッ
ト加工品の製造方法を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a method of manufacturing an electret processed product which can solve the above-mentioned problems of the prior art and can produce a high quality and high performance electret processed product at low cost. Is to do.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決する本発
明のエレクトレット加工品の製造方法は、高圧水を非導
電性シートの一方の面から他方の面に透過させて該非導
電性シートに水を浸透させ、次いで該非導電性シートを
乾燥してエレクトレット化シートにすることを特徴とす
るものである。According to the present invention, there is provided a method of manufacturing an electret-processed article, wherein high-pressure water is transmitted from one surface of a non-conductive sheet to the other surface of the non-conductive sheet, and water is applied to the non-conductive sheet. And then drying the non-conductive sheet to form an electretized sheet.
【０００７】このように非導電性シートに高圧水を透過
させることによりシート全体に水を満遍なく浸透させる
ので、これを乾燥するだけで高品質、高性能のエレクト
レット化シートにすることができる。しかも、製造設備
としては、水の噴射設備と乾燥設備などであるので、従
来の高電圧発生設備に比べ低廉であり、かつ安全維持管
理を低コストで行うことができる。[0007] Since high-pressure water is allowed to permeate the non-conductive sheet as described above, water can permeate the entire sheet evenly, so that a high-quality and high-performance electret sheet can be obtained only by drying the sheet. Moreover, since the manufacturing equipment includes a water injection equipment and a drying equipment, the cost is lower than that of the conventional high-voltage generating equipment, and the safety maintenance can be performed at low cost.
【０００８】[0008]
【発明の実施の形態】本発明に使用する非導電性シート
は、非導電性を有する材料であれば特に限定されない。
例えば、合成繊維或いは天然繊維の織物、編み物、不織
布等の繊維シートやプラスチックフィルムシートなどを
挙げることができる。これらの中でも特に合成繊維シー
トが好ましい。また、エアフィルター用の場合には、合
成繊維不織布が好ましく、中でも高性能フィルター用に
は、メルトブロー不織布を使用することが好ましい。DESCRIPTION OF THE PREFERRED EMBODIMENTS The non-conductive sheet used in the present invention is not particularly limited as long as it is a non-conductive material.
For example, a fiber sheet such as a woven fabric, a knitted fabric, or a nonwoven fabric of a synthetic fiber or a natural fiber, a plastic film sheet, and the like can be given. Among these, a synthetic fiber sheet is particularly preferable. Further, in the case of an air filter, a synthetic fiber nonwoven fabric is preferable, and in particular, in the case of a high performance filter, a melt blown nonwoven fabric is preferably used.
【０００９】非導電性シートの素材は、非導電性を有す
る材料であれば特に限定されるものではない。好ましく
は、体積抵抗率が１０12・Ω・ｃｍ以上、さらに好まし
くは１０14・Ω・ｃｍ以上の素材を主体とするものを使
用するとよい。The material of the non-conductive sheet is not particularly limited as long as the material has non-conductivity. Preferably, a material mainly composed of a material having a volume resistivity of 10 12 Ω · cm or more, more preferably 10 14 Ω · cm or more, is used.
【００１０】例えば、ポリエチレン、ポリプロピレン等
のポリオレフィン、ポリエチレンテレフタレート、ポリ
乳酸等のポリエステル、ポリカーボネート、ポリスチレ
ン、ポリフェニレンサルファイト、フッ素系樹脂、およ
びこれらの混合物などを挙げることができる。これらの
中でも、ポリオレフィンまたはポリ乳酸を主体とするも
のはエレクトレット性能の点から好ましく、さらにポリ
プロピレンを主体とするものは一層好ましい。For example, polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate and polylactic acid, polycarbonate, polystyrene, polyphenylene sulphite, fluororesins, and mixtures thereof can be mentioned. Among them, those mainly composed of polyolefin or polylactic acid are preferred from the viewpoint of electret performance, and those mainly composed of polypropylene are more preferred.
【００１１】本発明に使用する非導電性シートには、ヒ
ンダードアミン系添加剤又はトリアジン系添加剤を少な
くとも１種配合することが好ましい。この添加剤を非導
電性シートに含有させることにより、特に高いエレクト
レット性能を保持させることが可能になるからである。The non-conductive sheet used in the present invention preferably contains at least one kind of a hindered amine additive or a triazine additive. This is because by including this additive in the non-conductive sheet, particularly high electret performance can be maintained.
【００１２】上記２種類の添加剤のうちヒンダードアミ
ン系添加剤としては、ポリ〔（（６−（１，１，３，
３，−テトラメチルブチル）イミノ−１，３，５−トリ
アジン−２，４−ジイル）（（２，２，６，６，−テト
ラメチル−４−ピペリジル）イミノ）ヘキサメチレン
（（２，２，６，６，−テトラメチル−４−ピペリジ
ル）イミノ）〕（チバガイギー製、キマソープ９４４Ｌ
Ｄ）、コハク酸ジメチル−１−（２−ヒドロキシエチ
ル）−４−ヒドロキシ−２，２，６，６−テトラメチル
ピペリジン重縮合物（チバガイギー製、チヌピン６２２
ＬＤ）、２−（３，５−ジ−ｔ−ブチル−４−ヒドロキ
シベンジル）−２−ｎ−ブチルマロン酸ビス（１，２，
２，６，６−ペンタメチル−４−ピペリジル）（チバガ
イギー製、チヌピン１４４）などが挙げられる。Among the above two types of additives, hindered amine-based additives include poly [((6- (1,1,3,3)
3, -Tetramethylbutyl) imino-1,3,5-triazine-2,4-diyl) ((2,2,6,6-tetramethyl-4-piperidyl) imino) hexamethylene ((2,2 , 6,6, -Tetramethyl-4-piperidyl) imino)] (manufactured by Ciba Geigy, Chimasorp 944L)
D), dimethyl-1- (2-hydroxyethyl) -4-hydroxy-2,2,6,6-tetramethylpiperidine succinate polycondensate (manufactured by Ciba Geigy, Tinupin 622)
LD) bis (1,2,2-di-tert-butyl-4-hydroxybenzyl) -2-n-butylmalonate
2,6,6-pentamethyl-4-piperidyl) (manufactured by Ciba-Geigy, Tinupin 144).
【００１３】また、トリアジン系添加剤としては、前述
のポリ〔（（６−（１，１，３，３，−テトラメチルブ
チル）イミノ−１，３，５−トリアジン−２，４−ジイ
ル）（（２，２，６，６，−テトラメチル−４−ピペリ
ジル）イミノ）ヘキサメチレン（（２，２，６，６，−
テトラメチル−４−ピペリジル）イミノ）〕（チバガイ
ギー製、キマソープ９４４ＬＤ）、２−（４，６−ジフ
ェニル−１，３，５−トリアジン−２−イル）−５−
（（ヘキシル）オキシ）−フェノール（チバガイギー
製、チヌピン１５７７ＦＦ）などを挙げることができ
る。これらのなかでも特にヒンダードアミン系添加剤を
使用することが好ましい。As the triazine-based additive, the above-mentioned poly [((6- (1,1,3,3-tetramethylbutyl) imino-1,3,5-triazine-2,4-diyl) ((2,2,6,6-tetramethyl-4-piperidyl) imino) hexamethylene ((2,2,6,6-
Tetramethyl-4-piperidyl) imino)] (manufactured by Ciba Geigy, Chimasorp 944LD), 2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5-
((Hexyl) oxy) -phenol (manufactured by Ciba Geigy, Tinupin 1577FF) and the like. Among these, it is particularly preferable to use a hindered amine-based additive.
【００１４】非導電性シートには、上記添加剤の他に、
熱安定剤、耐候剤、重合禁止剤等の一般にエレクトレッ
ト加工品の非導電性シートに使用されている公知の添加
剤を添加するようにしてもよい。In the non-conductive sheet, in addition to the above additives,
Known additives generally used for non-conductive sheets of electret products, such as heat stabilizers, weathering agents, and polymerization inhibitors, may be added.
【００１５】上記ヒンダードアミン系添加剤又はトリア
ジン系添加剤の添加量としては、特に限定されないが、
好ましくは０．５〜５重量％の範囲にするとよく、更に
好ましくは０．７〜３重量％の範囲にするとよい。添加
量が０．５重量％未満では、目的とする高レベルのエレ
クトレット性能を得ることが難しくなる。また、５重量
％を超えるほど多く配合すると製糸性や製膜性を悪く
し、かつコスト的にも不利になるので好ましくない。The amount of the hindered amine-based additive or triazine-based additive is not particularly limited.
It is preferably in the range of 0.5 to 5% by weight, and more preferably in the range of 0.7 to 3% by weight. If the addition amount is less than 0.5% by weight, it becomes difficult to obtain the desired high level electret performance. Further, if the amount is more than 5% by weight, it is not preferable because the yarn formability and the film formability are deteriorated and the cost is disadvantageous.
【００１６】本発明のエレクトレット加工品の製造方法
は、上述した非導電性シートに水を十分な浸透状態にし
た後、この浸透状態のシートを乾燥する必要がある。こ
のように水を非導電性シート全体に満遍なく浸透させた
状態にするため、高圧水によって非導電性シートに透過
させる。水を強制的に非導電性シートを透過させること
で、シート全体に満遍なく浸透した状態になるので、こ
の浸透状態になった非導電性シートを乾燥すると、均一
かつ高密度に電荷が帯電した高品質のエレクトレット化
シートを得ることができる。これら一連の高圧水の透
過、乾燥の各工程は、連続的に行ってもよく、バッチ式
で行ってもよい。In the method for producing a processed electret product according to the present invention, it is necessary to sufficiently permeate water into the above-mentioned non-conductive sheet and then dry the permeated sheet. In order to make the water permeate the entire non-conductive sheet as described above, the high-pressure water allows the water to permeate the non-conductive sheet. By forcing water through the non-conductive sheet, the permeation of the non-conductive sheet becomes uniform, and the non-conductive sheet in the permeated state is dried. A high quality electret sheet can be obtained. These series of steps of permeation and drying of high-pressure water may be performed continuously or may be performed batchwise.
【００１７】非導電性シートに対する水の圧力は、水を
非導電性シートの片面から反対側へ透過させる大きさを
有するものであれば特に限定されない。シートの目付や
厚さ等によるが、例えば１００〜３０００ｋＰａの範囲
が好ましい。The pressure of the water on the non-conductive sheet is not particularly limited as long as it has a size that allows water to pass from one surface of the non-conductive sheet to the other side. Although it depends on the basis weight and thickness of the sheet, for example, a range of 100 to 3000 kPa is preferable.
【００１８】水が浸透後の非導電性シートの乾燥方法
は、従来公知の方法がいずれも使用可能である。例え
ば、熱風乾燥法、真空乾燥法、自然乾燥法等の方法を適
用することができる。なかでも熱風乾燥法は、連続処理
が可能であるため好ましい。熱風乾燥法の場合、乾燥温
度としてはエレクトレットを失活させない程度の温度に
する必要がある。好ましくは１２０℃以下、より好まし
くは１００℃以下、さらに好ましくは８０℃以下にする
のがよい。また、熱風乾燥前に、予備乾燥として、ニッ
プロール、吸水ロール、サクション吸引等によって余剰
の水分を取り除くようにすると尚良い。As a method for drying the non-conductive sheet after water has penetrated, any conventionally known method can be used. For example, a method such as a hot air drying method, a vacuum drying method, and a natural drying method can be applied. Among them, the hot air drying method is preferable because continuous processing is possible. In the case of the hot air drying method, the drying temperature needs to be a temperature that does not deactivate the electret. It is preferably 120 ° C. or lower, more preferably 100 ° C. or lower, and still more preferably 80 ° C. or lower. It is more preferable to remove excess water by nip rolls, water absorption rolls, suction suction, or the like as preliminary drying before hot air drying.
【００１９】本発明において、使用する水は、液体フィ
ルター等で汚れを除去したものであって、出来るだけ清
浄なものを使用することが好ましい。特にイオン交換
水、蒸留水、逆浸透膜を透過させた濾過水等の純水の使
用が好ましい。また、純水としてのレベルは、導電率で
１０3 μＳ／ｍ以下が好ましく、さらに好ましくは１０
2 μＳ／ｍ以下であるものがよい。In the present invention, the water used is a liquid filler.
Removed dirt with a filter, etc.
It is preferable to use a pure one. Especially ion exchange
Use pure water such as water, distilled water, or filtered water that has passed through a reverse osmosis membrane.
Is preferred. The level of pure water is determined by conductivity.
10ThreeμS / m or less, more preferably 10 μS / m or less.
TwoIt is preferable that it is not more than μS / m.
【００２０】また、上記水に水溶性有機溶剤を混合する
ことで、非導電性シートに対する水の浸透性を一層向上
することができる。この場合の水溶性有機溶剤の濃度と
しては、通常２０重量％以下にして使用される。また、
このように水に混合する水溶性有機溶剤としては、沸点
が水の沸点より低いものが好ましい。すなわち、水溶性
有機溶剤は、水のシートへの浸透性を向上させるための
ものであるので、一度シートに浸透したら、なるべく早
く気化して乾燥することが好ましいからである。より好
ましくは、水との沸点差が１０℃以上低いものがよい。Further, by mixing the water with a water-soluble organic solvent, the permeability of the water to the non-conductive sheet can be further improved. In this case, the concentration of the water-soluble organic solvent is usually adjusted to 20% by weight or less. Also,
As such a water-soluble organic solvent to be mixed with water, one having a boiling point lower than that of water is preferable. That is, since the water-soluble organic solvent is used to improve the permeability of water to the sheet, it is preferable that once it permeates the sheet, it is vaporized and dried as soon as possible. More preferably, those having a boiling point difference of 10 ° C. or more from water are good.
【００２１】水溶性有機溶剤の種類は、混合溶液の非導
電性シートへの浸透性が良ければ特に限定されない。例
えば、メチルアルコール、エチルアルコール、イソプロ
ピルアルコール等のアルコール類、アセトン、メチルエ
チルケトン類のケトン類、酢酸プロピル、酢酸ブチル等
のエステル類、その他アルデヒド類、カルボン酸類等を
挙げることができる。特に、浸透性の点からアルコール
類またはケトン類が好ましく、特にアセトン、イソプロ
ピルアルコール、エタノールのうちの少なくとも１種を
用いるのが好ましい。さらに好ましくは、イソプロピル
アルコールを主成分とするものが好ましい。The type of the water-soluble organic solvent is not particularly limited as long as the mixed solution has good permeability to the non-conductive sheet. Examples thereof include alcohols such as methyl alcohol, ethyl alcohol and isopropyl alcohol, ketones such as acetone and methyl ethyl ketone, esters such as propyl acetate and butyl acetate, and other aldehydes and carboxylic acids. In particular, alcohols or ketones are preferable from the viewpoint of permeability, and it is particularly preferable to use at least one of acetone, isopropyl alcohol, and ethanol. More preferably, those containing isopropyl alcohol as a main component are preferable.
【００２２】図１は、本発明のエレクトレット加工品の
製造方法を実施する装置を例示したものである。FIG. 1 illustrates an apparatus for carrying out the method for manufacturing an electret processed product according to the present invention.
【００２３】図１の装置において、１は高圧水Ｗを噴射
するノズルで、幅方向に延長するスリット状の噴射口を
有している。このノズル１は、外周面が網面で構成され
た回転ロール１０の内側に設けられ、高圧水を網面を透
過するように外側へ噴出するようになっている。回転ロ
ール１０は、送りローラ２，２の間に、非導電性シート
Ｓを屈曲させ巻き付かせるように設置されている。この
ようにノズル１を内設した回転ロール１０は、図示のよ
うに１箇所のみに限定されず、非導電性シートＳの移送
方向に複数箇所に連続配置するようにしてもよい。In the apparatus shown in FIG. 1, reference numeral 1 denotes a nozzle for jetting high-pressure water W, which has a slit-shaped jet port extending in the width direction. The nozzle 1 is provided inside a rotary roll 10 having an outer peripheral surface formed of a mesh surface, and blows high-pressure water to the outside so as to pass through the mesh surface. The rotating roll 10 is installed between the feed rollers 2 and 2 so as to bend and wind the non-conductive sheet S. The rotating roll 10 in which the nozzle 1 is provided in this way is not limited to only one location as shown in the figure, and may be arranged continuously at a plurality of locations in the transport direction of the non-conductive sheet S.
【００２４】被加工材の非導電性シートＳは、送りロー
ラ２，２間を回転ロール１０に密着状態になって移送さ
れながら、ノズル１からの高圧水Ｗを片面に受けるが、
網状のロール面に密着状態になっているため、高圧水Ｗ
はシートＳの反対側へ効率よく透過し、シート全体が浸
透状態になる。水が浸透状態になった非導電性シートＳ
は、ニップローラ３で余剰の水が絞り出された後、乾燥
装置４に移送されるようになっている。The non-conductive sheet S to be processed receives the high-pressure water W from the nozzle 1 on one side while being transported between the feed rollers 2 and 2 in close contact with the rotating roll 10.
Because it is in close contact with the mesh roll surface,
Is efficiently transmitted to the opposite side of the sheet S, and the entire sheet is in a permeated state. Non-conductive sheet S in which water has penetrated
After the excess water is squeezed out by the nip roller 3, it is transferred to the drying device 4.
【００２５】乾燥装置４には複数のガイドローラ５がジ
グザグ状に内設され、供給口４ａから加熱空気を供給
し、排気口４ｂから排出することにより内部を加熱する
ようになっている。この乾燥装置４に進入した非導電性
シートＳは、ガイドローラ５をジグザグ状に走行する間
に乾燥され、エレクトレット化されたシートになって搬
出される。このようにして得られたエレクトレット化シ
ートは、高圧水Ｗの透過作用により水がシート全体に満
遍なく浸透状態になっているで、シート全体に高い電荷
を均一分布した高品質、高性能のエレクトレット加工品
になる。A plurality of guide rollers 5 are provided in the drying device 4 in a zigzag manner, and heating air is supplied from a supply port 4a and discharged from an exhaust port 4b to heat the inside. The non-conductive sheet S that has entered the drying device 4 is dried while traveling in a zigzag manner on the guide roller 5, and is carried out as an electret sheet. The electretized sheet obtained in this way is a high-quality, high-performance electret processing in which a high charge is uniformly distributed throughout the sheet because water permeates the entire sheet due to the permeation of the high-pressure water W. Product.
【００２６】図２は、本発明のエレクトレット加工品の
製造方法を実施する他の装置を例示する。FIG. 2 illustrates another apparatus for carrying out the method for producing a processed electret according to the present invention.
【００２７】図２の装置は、図１の装置におけるノズル
１を内設した回転ロール１０を浸漬槽６の中に設けたも
のであり、その浸漬槽６には水Ｗが充填されている。The apparatus shown in FIG. 2 has a rotary roll 10 provided with the nozzle 1 in the apparatus shown in FIG. 1 provided in an immersion tank 6, and the immersion tank 6 is filled with water W.
【００２８】被加工材の非導電性シートＳは、前後の送
りローラ２，２で移送されながら、浸漬槽６内に浸漬さ
れ、回転ロール１０の外周網面に密着しながら移動する
間にノズル１から高圧水Ｗを受ける。その高圧水Ｗはシ
ートＳの反対側へ透過するため、シート全体が水Ｗによ
り浸透状態になる。The non-conductive sheet S of the workpiece is immersed in the immersion tank 6 while being transported by the front and rear feed rollers 2, 2, while the nozzle S moves while being in close contact with the outer peripheral net surface of the rotating roll 10. 1 receives high-pressure water W. Since the high-pressure water W permeates to the opposite side of the sheet S, the entire sheet is in a permeated state by the water W.
【００２９】この装置の場合には、非導電性シートＳは
浸漬槽６に浸漬された状態で高圧水Ｗの作用を受けるた
め、図１の場合よりも一層高い浸透状態にすることがで
きる。以後は、図１の装置と同様に、ニップロール機能
をもつ送りロール３により余剰の水を除去されたのち乾
燥装置４に送られて乾燥され、エレクトレット化したシ
ートになる。In the case of this apparatus, the non-conductive sheet S is subjected to the action of the high-pressure water W in a state of being immersed in the immersion tank 6, so that the permeation state can be made higher than in the case of FIG. After that, similarly to the apparatus in FIG. 1, excess water is removed by a feed roll 3 having a nip roll function, and then sent to a drying device 4 to be dried to form an electret sheet.
【００３０】このようにして得られたエレクトレット化
シートは、図１の装置の場合よりも水が一層高い浸透状
態になるように処理されているため、さらに優れた高品
質、高性能のエレクトレット加工品にすることができ
る。The electret sheet thus obtained has been treated so that water is more permeated than in the case of the apparatus shown in FIG. Goods.
【００３１】[0031]
【実施例】以下に説明する実施例において使用する特性
値は、次の測定法により測定したものである。EXAMPLES The characteristic values used in the examples described below are measured by the following measuring methods.
【００３２】〔捕集性能〕図３に示す捕集性能測定装置
で測定した。この捕集性能測定装置は、測定サンプルＭ
をセットするサンプルホルダー１１の上流側にダスト収
納箱１２を連結し、下流側に流量計１３、流量調整バル
ブ１４、ブロワ１５を連結している。また、サンプルホ
ルダー１１にパーテクルカウンター１６が設けられ、こ
のパーテクルカウンター１６を使用し、切替コック１７
を介して、測定サンプルＭの上流側のダスト個数と下流
側のダスト個数をそれぞれ測定することができる。[Capturing Performance] The collecting performance was measured by a collecting performance measuring apparatus shown in FIG. This trapping performance measuring device uses the measurement sample M
The dust storage box 12 is connected to the upstream side of the sample holder 11 for setting the flow rate, and the flow meter 13, the flow control valve 14, and the blower 15 are connected to the downstream side. A sample counter 16 is provided on the sample holder 11, and the switching cock 17 is used by using the particle counter 16.
, The number of dust on the upstream side and the number of dust on the downstream side of the measurement sample M can be respectively measured.
【００３３】捕集性能の測定に当たっては、径０．３μ
ｍのポリスチレン標準ラテックスパウダーをダスト収納
箱１２に充填し、サンプルＭをホルダー１１にセット
し、風量をフィルター通過速度が１．５ｍ／分になるよ
うに流量調整バルブ１４で調整し、ダスト濃度を１万〜
４万個／2.83×10-4ｍ3 （0.01ft3 ）の範囲で安定さ
せ、サンプルＭの上流のダスト個数Ｄおよび下流のダス
ト個数ｄをパーティクルカウンター１６（リオン社製、
ＫＣ−０１Ｂ）で５回測定し、ＪＩＳ Ｋ−０９０１に
基づいて下記計算式にて捕集性能（％）を求めた。In measuring the trapping performance, a diameter of 0.3 μm was used.
m of polystyrene standard latex powder in a dust storage box 12, a sample M is set in a holder 11, and the air volume is adjusted by a flow rate adjusting valve 14 so that a filter passing speed is 1.5 m / min. 10,000 ~
Stabilize in the range of 40,000 / 2.83 × 10 −4 m 3 (0.01 ft 3 ), and count the number D of dust upstream and the number d of downstream dust of the sample M using a particle counter 16 (manufactured by Rion Co., Ltd.).
KC-01B) was measured five times, and the trapping performance (%) was determined by the following formula based on JIS K-0901.
【００３４】 捕集性能（％）＝〔１−（ｄ／Ｄ）〕×１００ ただし、ｄ：下流のダスト個数 Ｄ：上流のダスト個数 〔平均繊維径〕ＳＥＭ写真により拡大した繊維１００本
について繊維径を測定し、その平均値を求めた。Collection performance (%) = [1− (d / D)] × 100, where d: number of downstream dust D: number of upstream dust [average fiber diameter] For 100 fibers enlarged by SEM photograph, fiber The diameter was measured, and the average value was obtained.
【００３５】実施例１ 耐候剤としてトリアジン系添加剤（チバガイギー製、キ
マソープ９４４）を１％含有し、かつメルトインデック
スＭＩが７００のポリプロピレンを原料とし、通常のメ
ルトブロー法により、目付４０ｇ／ｍ2 、平均繊維径
２．０μｍのメルトブロー不織布を作製した。次いで、
このメルトブロー不織布を、図２のように浸漬槽中の回
転ロールで移送しながら、片面から純水を高圧で透過さ
せることにより水を浸透させたのち、乾燥装置で乾燥し
てエレクトレットメルトブロー不織布にした。Example 1 As a weathering agent, a polypropylene containing 1% of a triazine-based additive (Kimasoap 944, manufactured by Ciba Geigy) and having a melt index MI of 700 was used as a raw material, and the basis weight was 40 g / m 2 by a usual melt blow method. A melt blown nonwoven fabric having an average fiber diameter of 2.0 μm was produced. Then
The melt-blown non-woven fabric was transferred by a rotating roll in a dipping tank as shown in FIG. 2, while permeating water by allowing pure water to permeate at high pressure from one side, and then dried by a drying device to form an electret melt-blown non-woven fabric. .
【００３６】得られたエレクトレット化メルトブロー不
織布の捕集性能を測定したところ、９９．５２％であっ
た。When the collecting performance of the obtained electret melt-blown nonwoven fabric was measured, it was 99.52%.
【００３７】比較例１ 実施例１と同じメルトブロー不織布を用い、純水中に１
分間浸漬した後、水切りして乾燥した。Comparative Example 1 Using the same melt-blown nonwoven fabric as in Example 1, 1
After soaking for a minute, it was drained and dried.
【００３８】得られたメルトブロー不織布の捕集性能を
測定したところ、５６．３％であり、低いレベルのもの
であった。When the collecting performance of the obtained melt blown nonwoven fabric was measured, it was 56.3%, which was a low level.
【００３９】比較例２ 実施例１と同じメルトブロー不織布の捕集性能を直接測
定したところ、５７．５％と低いものであった。Comparative Example 2 The collection performance of the same melt-blown nonwoven fabric as in Example 1 was directly measured and found to be as low as 57.5%.
【００４０】[0040]
【発明の効果】本発明の製造方法によれば、非導電性シ
ートに高圧水を透過させることによりシート全体に水を
満遍なく浸透させるので、これを乾燥するだけで高品
質、高性能のエレクトレット化シートにすることができ
る。しかも、製造設備としては、水の噴射設備と乾燥設
備などであるので、従来の高電圧発生設備に比べて低廉
であり、かつ安全維持管理を低コストで行うことができ
る。According to the production method of the present invention, since high-pressure water is allowed to permeate the entire non-conductive sheet to permeate the water throughout the sheet, it is possible to obtain a high-quality and high-performance electret simply by drying the sheet. Can be a sheet. Moreover, since the manufacturing equipment includes a water injection equipment and a drying equipment, the cost is lower than that of the conventional high voltage generation equipment, and the safety maintenance can be performed at low cost.
【図１】本発明のエレクトレット加工品の製造方法を実
施する装置の一例を示す概略図である。FIG. 1 is a schematic view showing an example of an apparatus for performing a method of manufacturing a processed electret according to the present invention.
【図２】本発明のエレクトレット加工品の製造方法を実
施する装置の他の例を示す概略図である。FIG. 2 is a schematic view showing another example of an apparatus for performing the method for manufacturing an electret processed product according to the present invention.
【図３】本発明の実施例で用いた捕集性能測定装置を示
す概略図である。FIG. 3 is a schematic diagram showing a trapping performance measuring device used in an example of the present invention.
【図４】従来の高電圧印加によるエレクトレット化方法
を示す概略図である。FIG. 4 is a schematic diagram showing a conventional electretization method by applying a high voltage.
１ ノズル ２ 送りロール ３ ニップロール ４ 乾燥装置 ６ 浸漬槽 １０ 回転ロール Ｓ 非導電性シート Ｗ 水 DESCRIPTION OF SYMBOLS 1 Nozzle 2 Feed roll 3 Nip roll 4 Drying device 6 Immersion tank 10 Rotating roll S Non-conductive sheet W Water
Claims (11)
他方の面に透過させて該非導電性シートに水を浸透さ
せ、次いで該非導電性シートを乾燥してエレクトレット
化シートにするエレクトレット加工品の製造方法。1. Electret processing in which high-pressure water is transmitted from one surface of a non-conductive sheet to the other surface so that water permeates the non-conductive sheet, and then the non-conductive sheet is dried to form an electret sheet. Product manufacturing method.
系添加剤或いはトリアジン系添加剤を０．５〜５重量％
含有している請求項１に記載のエレクトレット加工品の
製造方法。2. The non-conductive sheet contains 0.5 to 5% by weight of a hindered amine-based additive or a triazine-based additive.
The method for producing a processed electret product according to claim 1, wherein the product is contained.
シートである請求項１又は２に記載のエレクトレット加
工品の製造方法。3. The method according to claim 1, wherein the non-conductive sheet is a sheet made of synthetic fibers.
ロー不織布である請求項３に記載のエレクトレット加工
品の製造方法。4. The method according to claim 3, wherein the synthetic fiber sheet is a melt-blown nonwoven fabric.
主体に構成されている請求項１，２，３又は４に記載の
エレクトレット加工品の製造方法。5. The method for producing an electret processed product according to claim 1, wherein the non-conductive sheet is mainly composed of polyolefin.
主体に構成されている請求項５に記載のエレクトレット
加工品の製造方法。6. The method according to claim 5, wherein the polyolefin is mainly composed of polypropylene.
透膜の濾過水である請求項１〜６のいずれかに記載のエ
レクトレット加工品の製造方法。7. The method for producing a processed electret according to claim 1, wherein the water is ion-exchanged water, distilled water, or filtered water of a reverse osmosis membrane.
項１〜７のいずれかに記載のエレクトレット加工品の製
造方法。8. The method for producing a processed electret according to claim 1, wherein the water contains a water-soluble organic solvent.
を有する請求項８に記載のエレクトレット加工品の製造
方法。9. The method according to claim 8, wherein the water-soluble organic solvent has a lower boiling point than water.
はケトン類を主成分に構成されている請求項８又は９に
記載のエレクトレット加工品の製造方法。10. The method for producing an electret finished product according to claim 8, wherein the water-soluble organic solvent is mainly composed of alcohols or ketones.
ルコール、エチルアルコール、アセトンのうちの少なく
とも１種である請求項１０に記載のエレクトレット加工
品の製造方法。11. The method according to claim 10, wherein the water-soluble organic solvent is at least one of isopropyl alcohol, ethyl alcohol, and acetone.
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|---|---|---|---|
| JP2000368150A JP4670144B2 (en) | 2000-12-04 | 2000-12-04 | Manufacturing method of electret processed product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000368150A JP4670144B2 (en) | 2000-12-04 | 2000-12-04 | Manufacturing method of electret processed product |
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| Publication Number | Publication Date |
|---|---|
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| JP4670144B2 JP4670144B2 (en) | 2011-04-13 |
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ID=18838452
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004057976A (en) * | 2002-07-30 | 2004-02-26 | Toyobo Co Ltd | Electret filter medium having bio-degradability and its manufacturing method |
| JP2004060110A (en) * | 2002-07-30 | 2004-02-26 | Toyobo Co Ltd | Method for producing electret filter medium |
| JP2004066027A (en) * | 2002-08-01 | 2004-03-04 | Toyobo Co Ltd | Production method of electret filter medium |
| JP2004195357A (en) * | 2002-12-18 | 2004-07-15 | Toyobo Co Ltd | Method for producing electret filter medium |
| WO2016096883A1 (en) * | 2014-12-18 | 2016-06-23 | Oerlikon Textile Gmbh & Co. Kg | Device for loading a fibre web |
| JP2016169459A (en) * | 2015-03-16 | 2016-09-23 | 東レ株式会社 | Electret fiber sheet |
| KR20170125885A (en) * | 2015-03-16 | 2017-11-15 | 도레이 카부시키가이샤 | Electret fiber sheet |
| CN108368669A (en) * | 2015-12-22 | 2018-08-03 | 东丽株式会社 | Electret fiber piece |
| WO2023167057A1 (en) | 2022-03-03 | 2023-09-07 | 東レ株式会社 | Electret melt-blown nonwoven fabric producing method and production device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004057976A (en) * | 2002-07-30 | 2004-02-26 | Toyobo Co Ltd | Electret filter medium having bio-degradability and its manufacturing method |
| JP2004060110A (en) * | 2002-07-30 | 2004-02-26 | Toyobo Co Ltd | Method for producing electret filter medium |
| JP2004066027A (en) * | 2002-08-01 | 2004-03-04 | Toyobo Co Ltd | Production method of electret filter medium |
| JP2004195357A (en) * | 2002-12-18 | 2004-07-15 | Toyobo Co Ltd | Method for producing electret filter medium |
| WO2016096883A1 (en) * | 2014-12-18 | 2016-06-23 | Oerlikon Textile Gmbh & Co. Kg | Device for loading a fibre web |
| KR102466690B1 (en) | 2015-03-16 | 2022-11-14 | 도레이 카부시키가이샤 | electret fiber sheet |
| KR20170125885A (en) * | 2015-03-16 | 2017-11-15 | 도레이 카부시키가이샤 | Electret fiber sheet |
| JP2016169459A (en) * | 2015-03-16 | 2016-09-23 | 東レ株式会社 | Electret fiber sheet |
| CN108368669A (en) * | 2015-12-22 | 2018-08-03 | 东丽株式会社 | Electret fiber piece |
| KR20180096596A (en) * | 2015-12-22 | 2018-08-29 | 도레이 카부시키가이샤 | Electret fiber sheet |
| JPWO2017110299A1 (en) * | 2015-12-22 | 2018-10-11 | 東レ株式会社 | Electret fiber sheet |
| EP3396058A4 (en) * | 2015-12-22 | 2019-08-28 | Toray Industries, Inc. | Electret fiber sheet |
| US10512861B2 (en) | 2015-12-22 | 2019-12-24 | Toray Industries, Inc. | Electret fiber sheet |
| KR102639914B1 (en) | 2015-12-22 | 2024-02-23 | 도레이 카부시키가이샤 | electret fiber sheet |
| WO2023167057A1 (en) | 2022-03-03 | 2023-09-07 | 東レ株式会社 | Electret melt-blown nonwoven fabric producing method and production device |
| KR20240155213A (en) | 2022-03-03 | 2024-10-28 | 도레이 카부시키가이샤 | Method and device for manufacturing electret melt-blown nonwoven fabric |
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