JP2002161467A - Method for producing electret processed article - Google Patents
Method for producing electret processed articleInfo
- Publication number
- JP2002161467A JP2002161467A JP2000360763A JP2000360763A JP2002161467A JP 2002161467 A JP2002161467 A JP 2002161467A JP 2000360763 A JP2000360763 A JP 2000360763A JP 2000360763 A JP2000360763 A JP 2000360763A JP 2002161467 A JP2002161467 A JP 2002161467A
- Authority
- JP
- Japan
- Prior art keywords
- nonwoven fabric
- electret
- water
- producing
- spinning
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 36
- 238000001035 drying Methods 0.000 claims abstract description 15
- 238000005507 spraying Methods 0.000 claims abstract description 15
- 238000009987 spinning Methods 0.000 claims abstract description 13
- 229920001940 conductive polymer Polymers 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 17
- 239000000654 additive Substances 0.000 claims description 15
- -1 polypropylene Polymers 0.000 claims description 14
- 230000000996 additive effect Effects 0.000 claims description 11
- 239000004744 fabric Substances 0.000 claims description 7
- 239000004750 melt-blown nonwoven Substances 0.000 claims description 7
- 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
- 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
- 238000002074 melt spinning Methods 0.000 abstract description 8
- 239000000047 product Substances 0.000 description 9
- 239000000428 dust Substances 0.000 description 8
- 239000000835 fiber Substances 0.000 description 7
- OWYWGLHRNBIFJP-UHFFFAOYSA-N Ipazine Chemical compound CCN(CC)C1=NC(Cl)=NC(NC(C)C)=N1 OWYWGLHRNBIFJP-UHFFFAOYSA-N 0.000 description 5
- 238000007602 hot air drying Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 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
- 239000000155 melt Substances 0.000 description 2
- 239000012466 permeate Substances 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
- 238000003860 storage Methods 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
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000010521 absorption reaction Methods 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
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000001841 imino group Chemical group [H]N=* 0.000 description 1
- 239000003112 inhibitor Substances 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
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 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
- 229920000642 polymer Polymers 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
- 230000005855 radiation Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
Landscapes
- Nonwoven Fabrics (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３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. 3, in the conventional electret forming method, a high-voltage direct current 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、非導電性重合
体を多数の紡糸孔を設けた口金から溶融紡出し、その紡
出糸を下方のネットに捕集して不織布にする際、前記口
金から前記ネットまでの紡出糸に水を噴射又は噴霧し、
該紡出糸を捕集して得た不織布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 for producing an electret finished product, which comprises the steps of: melt-spinning a non-conductive polymer from a die provided with a large number of spinning holes; When collecting in a net of the non-woven fabric, spray or spray water on the spun yarn from the die to the net,
The nonwoven fabric obtained by collecting the spun yarn is dried to form an electret sheet.
【０００７】このように溶融紡糸と同時に直接不織布を
製布する際、口金から捕集ネットまでの紡出糸に水を噴
射又は噴霧したのちネット上に不織布を形成するので、
その不織布に水が満遍なく浸透状態になり、この不織布
を乾燥することで高品質、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、紡糸から一工程でエ
レクトレット化シートを得ることができ、また製造設備
は、紡糸設備、水の噴射又は噴霧設備、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になり、
かつ安全維持管理を低コストで行うことができる。As described above, when fabricating a nonwoven fabric directly at the same time as melt spinning, water is sprayed or sprayed on a spun yarn from a die to a collecting net, and then the nonwoven fabric is formed on the net.
Water uniformly penetrates into the nonwoven fabric, and by drying the nonwoven fabric, a high-quality, high-performance electret sheet can be obtained. In addition, the electretized sheet can be obtained in one step from spinning, and the manufacturing equipment is a spinning equipment, a water spraying or spraying equipment, a drying equipment, etc., so it is less expensive than conventional high voltage generating equipment. ,
In addition, safety maintenance can be performed at low cost.
【０００８】[0008]
【発明の実施の形態】本発明において不織布は、非導電
性重合体の溶融紡糸と同時に、捕集ネット上に直接製布
するものであれば特に限定されない。例えば、スパンボ
ンド不織布、メルトブロー不織布を挙げることができ
る。中でもメルトブロー不織布への適用が好適である。BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the nonwoven fabric is not particularly limited as long as it is woven directly on a collecting net simultaneously with the melt-spinning of a non-conductive polymer. For example, spun bond nonwoven fabric and melt blown nonwoven fabric can be mentioned. Among them, application to a melt blown nonwoven fabric is preferable.
【０００９】非導電性重合体は、非導電性の特性を有す
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以上の重合体を主体にするのがよい。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。The non-conductive polymer is not particularly limited as long as it has non-conductive properties. Preferably, the volume resistivity is at least 10 12 Ω · cm, more preferably at least 10 14 Ω · cm.
It is preferable to use a polymer of Ω · cm or more as a main component. For example,
Examples thereof include polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate and polylactic acid, polycarbonate, polystyrene, polyphenylene sulfite, fluorine-based resins, and mixtures thereof. 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.
【００１０】本発明に使用する非導電性重合体から得ら
れる不織布には、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。この添加剤を不織布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。この添加剤は溶融紡糸前の非導電性重合体
中に配合しておくことが好ましい。The nonwoven fabric obtained from the non-conductive polymer 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 nonwoven fabric, it is possible to maintain particularly high electret performance. This additive is preferably blended in the non-conductive polymer before melt spinning.
【００１１】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).
【００１２】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。Further, 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.
【００１３】非導電性の不織布には、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不織布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。[0013] In addition to the above additives, known additives commonly used in nonconductive nonwoven fabrics of electret processed products, such as heat stabilizers, weathering agents, and polymerization inhibitors, are added to the nonconductive nonwoven fabric. You may make it.
【００１４】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. In addition, when the amount is more than 5% by weight, the yarn formability and film formability are deteriorated, and the cost is disadvantageous.
【００１５】本発明のエレクトレット加工品の製造方法
は、溶融紡糸と同時に直接製布される不織布に水が十分
に浸透状態になるように付与し、この浸透状態の不織布
を乾燥する。このように不織布全体に水を満遍なく浸透
状態にするため、口金から捕集ネットまでの紡出糸に水
を噴射又は噴霧することが重要である。このように紡出
糸の段階で水を噴射又は噴霧で与えることにより、不織
布になったとき水が全体に満遍なく浸透状態になるた
め、これを乾燥するだけで、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にすることがで
きる。In the method for producing a processed electret product of the present invention, water is applied to a nonwoven fabric directly laid at the same time as melt spinning so that water is sufficiently permeated, and the permeated nonwoven fabric is dried. It is important to spray or spray water on the spun yarn from the die to the collecting net in order to make the water permeate the entire nonwoven fabric as described above. By spraying or spraying water at the stage of spun yarn in this way, when the non-woven fabric becomes non-woven, the water permeates the entire surface. A high quality electretized sheet can be obtained.
【００１６】また、水を噴射又は噴霧する位置は、口金
から捕集ネットまでの間であればよいが、好ましくは口
金から５ｃｍ以上下方へ離れた位置にした方がよい。口
金から５ｃｍ未満の領域では口金からの放熱により温度
が高く、かつ紡出糸自体も高い温度であるため噴射水や
噴霧水が一部蒸発し、不織布の状態になったときの浸透
性が不十分になる場合がある。また、紡出糸が十分に固
まる前に水を噴射して冷却することによりシート物性が
変わるため好ましくない。The position where the water is sprayed or sprayed may be between the base and the collecting net, but is preferably at a position separated from the base by 5 cm or more downward. In a region less than 5 cm from the mouthpiece, the temperature is high due to heat radiation from the mouthpiece and the spun yarn itself is also at a high temperature. May be enough. Further, if the spun yarn is cooled by jetting water before it is sufficiently hardened, the physical properties of the sheet change, which is not preferable.
【００１７】水が浸透後の不織布の乾燥方法は、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 nonwoven fabric 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, it is necessary to set the drying temperature to a temperature that does not deactivate the electret. Preferably 120 ° C or less, more preferably 100 ° C
The temperature is more preferably set to 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.
【００１８】本発明において、噴射又は噴霧に用いる水
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、逆浸透膜の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、１
０2 μＳ／ｍ以下であるものがよい。In the present invention, water used for jetting or spraying is obtained by removing dirt with a liquid filter or the like.
It is preferable to use one that is as clean as possible. In particular, it is preferable to use pure water such as ion-exchanged water, distilled water, and filtered water of a reverse osmosis membrane. The level of pure water is preferably 10 3 μS / m or less in conductivity, more preferably 1 μS / m or less.
It is better to be not more than 0 2 μS / m.
【００１９】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 producing a processed electret according to the present invention.
【００２０】図１の装置において、１は溶融紡糸用の口
金であり、下面に複数の紡糸孔１ａが紙面に直交する方
向に列状に並ぶように設けられている。この口金１の下
方に捕集ネット２が配置され、ロール３，３に無端状に
巻回されて矢印方向に移動するようになっている。口金
１と捕集ネット２との間に水Ｗを噴射又は噴霧するノズ
ル４が設けられている。In the apparatus shown in FIG. 1, reference numeral 1 denotes a spinneret for melt spinning, and a plurality of spinning holes 1a are provided on a lower surface of the spinneret so as to be arranged in a row in a direction perpendicular to the paper surface. A collecting net 2 is arranged below the base 1 and is wound endlessly on rolls 3 and 3 so as to move in the direction of the arrow. A nozzle 4 for jetting or spraying water W is provided between the base 1 and the collection net 2.
【００２１】このノズル４は、先端の吐出口４ａが幅方
向（紙面に直交する方向）に延長したスリット状になっ
ているか、或いは多数の円形噴射口を幅方向に並列した
構成になっている。かつ、吐出口４ａは、口金１の下面
から下方への距離Ｌが５ｃｍ以上の位置になるように設
定されている。The nozzle 4 has a discharge port 4a at the tip in a slit shape extending in the width direction (a direction perpendicular to the plane of the paper), or has a configuration in which a number of circular injection ports are arranged in parallel in the width direction. . Further, the discharge port 4a is set so that the distance L downward from the lower surface of the base 1 is 5 cm or more.
【００２２】口金１から紡糸された多数の紡出糸Ｆは、
捕集ネット２に捕集されて不織布Ｓに形成される。スパ
ンボンド紡糸機の場合には、一般に紡出糸Ｆは連続した
フィラメントとしてネット２に捕集されるが、メルトブ
ロー紡糸機の場合には、口金構造が列状の紡糸孔１ａの
両側に熱風噴射用スリット（図示せず）を設けているの
で、紡出糸Ｆは熱風噴射流と共に紡出されるため短繊維
状に千切れた状態になって捕集される。A large number of spun yarns F spun from the die 1 are:
The nonwoven fabric S is collected by the collection net 2 and formed. In the case of a spun bond spinning machine, the spun yarn F is generally collected as continuous filaments in the net 2, but in the case of a melt blow spinning machine, the spinneret structure is formed by hot air jetting on both sides of a row of spinning holes 1a. Since the slit for use (not shown) is provided, the spun yarn F is spun together with the hot air jet stream, so that the spun yarn is cut into short fibers and collected.
【００２３】上記のように口金１から紡糸される紡出糸
Ｆに対し、ノズル４から噴射又は噴霧した水Ｗが付与さ
れるため、その紡出糸Ｆがネット２上で不織布Ｓに形成
されたときは、不織布Ｓの全体に水が浸透状態になって
いる。この水が浸透した不織布Ｓは、次いで送りローラ
５によりニップされて余剰の水を除去されたのち、乾燥
装置６に搬送される。As described above, the water W sprayed or sprayed from the nozzle 4 is applied to the spun yarn F spun from the die 1, so that the spun yarn F is formed on the nonwoven fabric S on the net 2. When this occurs, the water has penetrated the entire nonwoven fabric S. The nonwoven fabric S impregnated with the water is then nipped by the feed roller 5 to remove excess water, and then conveyed to the drying device 6.
【００２４】乾燥装置６は、供給口６ａから加熱空気が
供給され、排気口６ｂから排出されることにより内部が
加熱されている。不織布Ｓはこの乾燥装置６に進入し、
加熱乾燥されることにより、エレクトレット化シートに
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、水Ｗを満遍なく浸透状態にしていたた
め、高い電荷を均一分布した高品質、高性能のエレクト
レット加工品になっている。The inside of the drying device 6 is heated by supplying heated air from a supply port 6a and discharging it from an exhaust port 6b. The nonwoven fabric S enters the drying device 6,
By heating and drying, it is carried out as an electretized sheet. Since the electretized sheet obtained in this manner had the water W permeated uniformly, it was a high-quality, high-performance electret processed product in which a high charge was uniformly distributed.
【００２５】[0025]
【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.
【００２６】〔捕集性能〕図２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。[Collecting 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. Further, 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.
【００２７】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。When measuring the trapping performance, a diameter of 0.3 μm was used.
m polystyrene standard latex powder is charged into a dust storage box 12, the sample M is set in the holder 11, and the air volume is adjusted by the flow control valve 14 so that the filter passage speed becomes 1.5 m / min. 10,000 ~
Stabilize in the range of 40,000 particles / 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 Corporation,
KC-01B) was measured five times, and the trapping performance (%) was determined by the following formula based on JIS K-0901.
【００２８】 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 dust downstream D: number of upstream dust [average fiber diameter] 100 fibers enlarged by SEM photograph The diameter was measured, and the average value was obtained.
【００２９】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、図１のよ
うな通常のメルトブロー装置において、口金下７ｃｍの
位置に水を供給できるような噴射設備を付加し、紡出糸
に水を付与しながら、目付４０ｇ／ｍ2、平均繊維径
２．０μｍのメルトブロー不織布を製造した。Example 1 A polypropylene was used as a weathering agent containing 1% of a triazine-based additive (manufactured by Ciba Geigy, Chimasorpe 944) and having a melt index MI of 700. Injection equipment capable of supplying water at a position 7 cm below was added, and a melt-blown nonwoven fabric having a basis weight of 40 g / m 2 and an average fiber diameter of 2.0 μm was produced while supplying water to the spun yarn.
【００３０】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、９７．４９％であっ
た。When the collecting performance of the obtained electret melt-blown nonwoven fabric was measured, it was 97.49%.
【００３１】比較例１ 噴射設備を設けずに水を付与しなかった以外は、実施例
１と同様にしてメルトブロー不織布を製造した。Comparative Example 1 A melt blown nonwoven fabric was manufactured in the same manner as in Example 1 except that no water was applied without providing a spraying facility.
【００３２】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、５７．５％と低いものであった。When the collecting performance of the obtained melt blown nonwoven fabric was measured, it was as low as 57.5%.
【００３３】[0033]
【発明の効果】本発明の製造方法によれば、溶融紡糸と
同時に直接不織布を製布する際、口金から捕集ネットま
での紡出糸に水を噴射又は噴霧したのちネット上に不織
布を形成するので、その不織布に水が満遍なく浸透状態
になり、この不織布を乾燥することで高品質、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、
紡糸から一工程でエレクトレット化シートを得ることが
でき、また製造設備は、紡糸設備、水の噴射又は噴霧設
備、乾燥設備などであるので、従来の高電圧発生設備に
比べて低廉になり、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, when fabricating a nonwoven fabric directly at the same time as melt spinning, water is sprayed or sprayed on the spun yarn from the die to the collecting net, and then the nonwoven fabric is formed on the net. Therefore, water uniformly penetrates into the nonwoven fabric, and by drying the nonwoven fabric, a high-quality, high-performance electret sheet can be obtained. Moreover,
An electret sheet can be obtained in one step from spinning, and the manufacturing equipment is a spinning equipment, a water spraying or spraying equipment, a drying equipment, etc., so it is less expensive than conventional high voltage generating equipment, and 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. 2 is a schematic view showing a trapping performance measuring device used in an embodiment of the present invention.
【図３】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. 3 is a schematic diagram showing a conventional electretization method by applying a high voltage.
１ 口金 １ａ 紡糸孔 ２ 捕集ネット ４ （噴射又は噴霧用の）ノズル ４ａ 吐出口 ６ 乾燥装置 Ｆ 紡出糸 Ｓ 不織布 Ｗ 水 DESCRIPTION OF SYMBOLS 1 Cap 1a Spinning hole 2 Collection net 4 Nozzle (for spraying or spraying) 4a Discharge port 6 Drying device F Spun yarn S Nonwoven fabric W Water
Claims (7)
口金から溶融紡出し、その紡出糸を下方のネットに捕集
して不織布にする際、前記口金から前記ネットまでの紡
出糸に水を噴射又は噴霧し、該紡出糸を捕集して得た不
織布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。When a non-conductive polymer is melt-spun from a spinneret provided with a large number of spinning holes and the spun yarn is collected in a lower net to form a nonwoven fabric, the spinning from the spinneret to the net is performed. A method for producing an electret-processed product by spraying or spraying water on the spun yarn, collecting the spun yarn, and drying the nonwoven fabric to form an electret sheet.
５ｃｍ以上下方へ離れた位置で行う請求項１に記載のエ
レクトレット加工品の製造方法。2. The method according to claim 1, wherein the jetting or spraying of the water is performed at a position at least 5 cm below the base.
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 for producing an electret finished product according to claim 1, wherein the nonwoven fabric contains 0.5 to 5% by weight of a hindered amine-based additive or a triazine-based additive.
請求項１，２又は３に記載のエレクトレット加工品の製
造方法。4. The method for producing an electret finished product according to claim 1, wherein the nonwoven fabric is a melt blown nonwoven fabric.
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 a processed electret according to claim 1, wherein the nonwoven fabric 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000360763A JP2002161467A (en) | 2000-11-28 | 2000-11-28 | Method for producing electret processed article |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000360763A JP2002161467A (en) | 2000-11-28 | 2000-11-28 | Method for producing electret processed article |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002161467A true JP2002161467A (en) | 2002-06-04 |
Family
ID=18832304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000360763A Pending JP2002161467A (en) | 2000-11-28 | 2000-11-28 | Method for producing electret processed article |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002161467A (en) |
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