JPS63280408A - Heat resistant electret material - Google Patents
Heat resistant electret materialInfo
- Publication number
- JPS63280408A JPS63280408A JP11545487A JP11545487A JPS63280408A JP S63280408 A JPS63280408 A JP S63280408A JP 11545487 A JP11545487 A JP 11545487A JP 11545487 A JP11545487 A JP 11545487A JP S63280408 A JPS63280408 A JP S63280408A
- Authority
- JP
- Japan
- Prior art keywords
- hindered
- polymer
- molecular weight
- heat
- electret
- 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
- 239000000463 material Substances 0.000 title claims abstract description 38
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000003381 stabilizer Substances 0.000 claims abstract description 12
- 150000003839 salts Chemical class 0.000 claims abstract description 7
- 150000001412 amines Chemical class 0.000 claims abstract description 6
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229920000642 polymer Polymers 0.000 claims abstract description 5
- 230000028161 membrane depolarization Effects 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 abstract description 10
- 229920006158 high molecular weight polymer Polymers 0.000 abstract description 9
- -1 polypropylene Polymers 0.000 abstract description 7
- 238000002156 mixing Methods 0.000 abstract description 5
- 239000004743 Polypropylene Substances 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 229920001155 polypropylene Polymers 0.000 abstract description 4
- 230000007423 decrease Effects 0.000 abstract description 2
- 150000002989 phenols Chemical class 0.000 abstract 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 abstract 2
- OWYWGLHRNBIFJP-UHFFFAOYSA-N Ipazine Chemical compound CCN(CC)C1=NC(Cl)=NC(NC(C)C)=N1 OWYWGLHRNBIFJP-UHFFFAOYSA-N 0.000 description 7
- 239000004745 nonwoven fabric Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000009472 formulation Methods 0.000 description 4
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 3
- 230000002999 depolarising effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- PWWSSIYVTQUJQQ-UHFFFAOYSA-N distearyl thiodipropionate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCCCCCCCC PWWSSIYVTQUJQQ-UHFFFAOYSA-N 0.000 description 2
- 125000001841 imino group Chemical group [H]N=* 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005453 pelletization Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- XYXJKPCGSGVSBO-UHFFFAOYSA-N 1,3,5-tris[(4-tert-butyl-3-hydroxy-2,6-dimethylphenyl)methyl]-1,3,5-triazinane-2,4,6-trione Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C)=C1CN1C(=O)N(CC=2C(=C(O)C(=CC=2C)C(C)(C)C)C)C(=O)N(CC=2C(=C(O)C(=CC=2C)C(C)(C)C)C)C1=O XYXJKPCGSGVSBO-UHFFFAOYSA-N 0.000 description 1
- DOTYDHBOKPPXRB-UHFFFAOYSA-N 2-butyl-2-[(3,5-ditert-butyl-4-hydroxyphenyl)methyl]propanedioic acid Chemical compound CCCCC(C(O)=O)(C(O)=O)CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 DOTYDHBOKPPXRB-UHFFFAOYSA-N 0.000 description 1
- YQKYLDVPCOGIRB-SEKJGCFDSA-N Asp-Leu-Thr-Asp Chemical compound OC(=O)C[C@H](N)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CC(O)=O)C(O)=O YQKYLDVPCOGIRB-SEKJGCFDSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- GHKOFFNLGXMVNJ-UHFFFAOYSA-N Didodecyl thiobispropanoate Chemical compound CCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCC GHKOFFNLGXMVNJ-UHFFFAOYSA-N 0.000 description 1
- 239000003508 Dilauryl thiodipropionate Substances 0.000 description 1
- 239000002656 Distearyl thiodipropionate Substances 0.000 description 1
- PMVSDNDAUGGCCE-TYYBGVCCSA-L Ferrous fumarate Chemical compound [Fe+2].[O-]C(=O)\C=C\C([O-])=O PMVSDNDAUGGCCE-TYYBGVCCSA-L 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000007983 Tris buffer Substances 0.000 description 1
- FLPKSBDJMLUTEX-UHFFFAOYSA-N bis(1,2,2,6,6-pentamethylpiperidin-4-yl) 2-butyl-2-[(3,5-ditert-butyl-4-hydroxyphenyl)methyl]propanedioate Chemical compound C1C(C)(C)N(C)C(C)(C)CC1OC(=O)C(C(=O)OC1CC(C)(C)N(C)C(C)(C)C1)(CCCC)CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 FLPKSBDJMLUTEX-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000003851 corona treatment Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 235000019304 dilauryl thiodipropionate Nutrition 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 235000019305 distearyl thiodipropionate Nutrition 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 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 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000010287 polarization 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
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Landscapes
- Artificial Filaments (AREA)
- Filtering Materials (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、耐熱安定性のあるエレクトレット材料に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a heat-resistant and stable electret material.
［従来の技術］
エレクトレット材料として種々の提唱がなされているが
、高分子重合体に配合物を添加しエレクトレット化効果
を付与した工しクトレット材料の例は、特開昭６０−１
９６９２２がある。 この方法は、絶縁高分子物質に脂
肪酸金属塩を配合しコロナ処理を施しエレクトレット材
料を製造する方法である。[Prior Art] Although various proposals have been made as electret materials, an example of an engineered electret material in which a compound is added to a high molecular weight polymer to impart an electret effect is disclosed in Japanese Patent Laid-Open No. 60-1.
There is 96922. This method is a method of manufacturing an electret material by blending a fatty acid metal salt with an insulating polymeric substance and subjecting it to corona treatment.
この材料を熱刺激脱分極電流からのトラップ電荷量で評
価した結果、若干の配合効果は認められたが、それだけ
では満足できろものでなかった。As a result of evaluating this material based on the amount of trapped charge from thermally stimulated depolarization current, a slight blending effect was observed, but this alone was not sufficient.
［発明が解決しようとする問題点］
本発明の目的は、かかる従来品の有する欠点を解消した
耐熱性エレクトレット材料を提供する事にある。 即ち
、高温サイドに高いトラップ電荷量を有することて長時
間にわたり電荷を安定に保つ、耐熱性エレクトレット材
料を提供する点にある。[Problems to be Solved by the Invention] An object of the present invention is to provide a heat-resistant electret material that eliminates the drawbacks of such conventional products. That is, the object of the present invention is to provide a heat-resistant electret material that has a high amount of trapped charge on the high-temperature side and keeps the charge stable for a long time.
［問題点を解決するための手段］
本発明はヒンダードアミン系、含窒素ヒンダードフェノ
ール系、金属塩ヒンダードフェノール系あるいはフェノ
ール系の安定剤から選ばれた少なくとも１種を配合して
なる材料からなり、かつ１００°Ｃ以上における熱刺激
脱分極電流からのトラップ電荷量が２．０Ｘ１０−１０
クーロン／ ｃｍ ２以上である耐熱性エレクトレット
材料である。[Means for Solving the Problems] The present invention comprises a material containing at least one stabilizer selected from hindered amine stabilizers, nitrogen-containing hindered phenol stabilizers, metal salt hindered phenol stabilizers, or phenolic stabilizers. , and the amount of trapped charge from thermally stimulated depolarizing current at 100°C or higher is 2.0X10-10
It is a heat-resistant electret material with a coulomb/cm2 or higher.
以下に本発明について詳細に説明する。The present invention will be explained in detail below.
高分子重合体のエレクトレット化方法として静電気ハン
ドブック、特開昭６１−２８９１７７などに述べられて
いるが、結果的には、シート構成物内に電子の注入、イ
オンの移動、双極子の配向などを生ぜしめることで分極
し、シートに電荷を付与する。Methods for converting high-molecular polymers into electrets are described in the Electrostatic Handbook, JP-A No. 61-289177, etc., but as a result, injection of electrons, movement of ions, orientation of dipoles, etc. within the sheet composition are described. This generates polarization and imparts an electric charge to the sheet.
本発明に係る耐熱性エレクトレット材料の構成物の一部
である高分子重合体の素ｉ才としては５体積抵抗率が１
０１２・Ω・ｃｍ以上の素材が好ましく。The material of the high molecular weight polymer which is a part of the composition of the heat-resistant electret material according to the present invention has a volume resistivity of 5 and 1.
A material with a resistance of 0.012 Ω/cm or more is preferable.
さらに好ましくは１Ｑ１４・Ω・ｃｍ以上の素材である
。More preferably, the material is 1Q14·Ω·cm or more.
例えば、ポリプロピレン、ポリエチレン、ポリスチレン
、ポリエステル、ポリカーボネート、ポリフェニレンサ
ルファイド、フッ素系樹脂、塩素系樹脂、ビニール樹脂
、およびこれらのブレンド物を用いることができる。For example, polypropylene, polyethylene, polystyrene, polyester, polycarbonate, polyphenylene sulfide, fluororesin, chlorine resin, vinyl resin, and blends thereof can be used.
これら高分子重合体をエレクトレット材料として提供す
る場合、シート化、フィルム化、繊維化。When these high molecular weight polymers are provided as electret materials, they are made into sheets, films, and fibers.
パイプ化工程などとするが、熱成形が必要な場合が多い
。Although it is called a pipe forming process, thermoforming is often required.
例えば、ポリプロピレンを例に取るとペレット作成時で
２１０〜２４０″Ｃ，シート化、フィルム化、パイプ化
などで２３０〜２８０’ Ｃ，繊維化では２７０〜４０
０’ Ｃで時間的には３〜３０分位が目安となる。 従
って配合する安定剤は。For example, if we take polypropylene as an example, it is 210-240'C when making pellets, 230-280'C when made into sheets, films, pipes, etc., and 270-40'C when made into fibers.
At 0'C, the approximate time is about 3 to 30 minutes. Therefore, what kind of stabilizer should be added?
これらの条件で安定な物でなくてはならない。It must be stable under these conditions.
また５０〜８０６Ｃ程度で数か月置かれる環境はエレク
トレット化された材料の保管、使用条件上よくあり、少
なくとも８０°Ｃ以上で安定でな ゛くてはならない
。 好ましくは１００°Ｃ以上で安定なもの、特に好ま
しくは１３０°Ｃ以上で安定なものが使用上から望まれ
る。Furthermore, an environment in which the electret material is kept for several months at a temperature of about 50 to 806°C is common due to storage and usage conditions, so it must be stable at at least 80°C or higher. Preferably, it is stable at temperatures of 100°C or higher, particularly preferably stable at temperatures of 130°C or higher, from the viewpoint of use.
さらに高分子重合体と配合物は、相溶性があることも安
定性の面から必要である。Furthermore, from the viewpoint of stability, it is necessary that the high molecular weight polymer and the compound be compatible.
これらの条件を満たす配合物としては比較的分子量が大
きく、加工時の熱（２５０’ Ｃ程度）に対してもほと
んど揮発したり９分解しない安定な配合物を高分子重合
体１００部に対し、少なくとも０．１部以上配合するこ
とが高いトラップ電荷量を材料に付与するため必要であ
る。 好ましくは０．２部以上配合することが望ましい
。 さらに好ましくは０．３部以上配合することが望ま
しい。 また安定性を増すために、タイプの異なった安
定剤を配合しても良い。A compound that satisfies these conditions is a stable compound that has a relatively large molecular weight and hardly evaporates or decomposes even when exposed to heat during processing (approximately 250'C), based on 100 parts of high molecular weight polymer. It is necessary to blend at least 0.1 part or more in order to impart a high amount of trapped charge to the material. It is desirable to blend preferably 0.2 part or more. It is more preferable to add 0.3 parts or more. Additionally, different types of stabilizers may be blended to increase stability.
ただし、配合量が２部以上ともなると材料としての均一
性に欠けることがある。However, if the blending amount is 2 parts or more, the material may lack uniformity.
高分子重合体に配合するヒンダードアミン系。Hindered amine type compounded into high molecular weight polymers.
含窒素ヒンダードフェノール系、金属塩ヒンダードフェ
ノール系あるいはフェノール系安定剤の一例としては、
ヒンダードアミンの場合４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）へキサメチ
レン（（２゜２．６．６−テトラメチル−４−ピペリジ
ル）イミノ）］（チバガイギー社商品名でキマソーブ９
４４ＬＤと以後略称する）、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−チトラメチルビペリジン重縮合物（チバガイギー
社商品名でチヌビン６２２ＬＤと以後略称する）、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−
ベンタメチルー４−ピペリジル）（チバガイギー社商品
名でチヌビン１４４と以後略称する。）などがある。Examples of nitrogen-containing hindered phenol, metal salt hindered phenol, or phenol stabilizers include:
In the case of hindered amine, 4 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)]
44LD), dimethyl succinate-1-(
2-hydroxyethyl)-4-hydroxy-2,2,6
, 6-titramethylbiperidine polycondensate (hereinafter abbreviated as Tinuvin 622LD under the Ciba Geigy trade name), 2-
(3,5-di-t-butyl-4-hydroxybenzyl)
-2-n-butylmalonic acid bis(1,2,2,6,6-
Bentamethyl-4-piperidyl) (trade name of Ciba Geigy, hereinafter abbreviated as Tinuvin 144).
含窒素ヒンダードフェノールでは、１，３．５−トリス
（４−ｔ−ブチル−３−ヒドロキシ−２゜６−シメチル
ペンシル）イソシアヌル酸（日本サイアナミツド社商品
名でサイアノックス１７９０と以後略称する）あるいは
１．３．５−）リス（３，５−ジ−ｔ−ブチル−４−ヒ
ドロキシベンジル）イソシアヌル酸（チバガイギー社商
品名でｌＲ３１１４と以後略称する）などがある。As a nitrogen-containing hindered phenol, 1,3,5-tris(4-t-butyl-3-hydroxy-2゜6-dimethylpencyl)isocyanuric acid (trade name of Nippon Cyanamid Co., Ltd., hereinafter abbreviated as Cyanox 1790) Alternatively, there may be 1.3.5-)lis(3,5-di-t-butyl-4-hydroxybenzyl)isocyanuric acid (hereinafter abbreviated as 1R3114 under the Ciba Geigy trade name).
金属塩ヒンダードフェノールでは３，５−ジー上ブチル
−４−ヒドロシキーベンジルーモノーエチルーホスホネ
ートのカルシウム（チバガイギー社商品名でｌＲ１４２
５ＷＬと以後略称する）。The metal salt hindered phenol is calcium 3,5-di-butyl-4-hydroxybenzyrumonoethylphosphonate (lR142 under the Ciba Geigy trade name).
(hereinafter abbreviated as 5WL).
３．５−ジー上ブチル−４−ヒドロシキーペンジルーモ
ノーエチルーホスホネートのニッケル（チバガイギー社
商品名でイルガスタープ２００２と以後略称する）、あ
るいは同上化合物のマグネシウム塩などがある。Examples include nickel of 3.5-di-butyl-4-hydroxypendyl-monoethylphosphonate (hereinafter abbreviated as Irgastarp 2002 under the trade name of Ciba Geigy), or the magnesium salt of the same compound.
フェノール系では１，３．５−）リメチ°ルー２゜４．
６−）リスく３，５−ジ−ｔ−ブチル−４−ヒドロキシ
ベンジル）ベンゼン（チバガイギー社商品名でｌＲ１３
３０と以後略称する）、ペンタエリスリチル−テトラキ
ス［３−（３，５−ジ−ｔ−ブチル−４−ヒドロキシフ
ェニル）プロピオネート］（チバガイギー社商品名でＩ
ＲＩＯＩＯと以後略称する）などがある。In the phenol system, 1,3.5-)rimethyl 2°4.
6-) 3,5-di-t-butyl-4-hydroxybenzyl)benzene (Ciba Geigy's trade name: lR13)
30), pentaerythrityl-tetrakis [3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate] (trade name I, Ciba Geigy)
(hereinafter abbreviated as RIOIO).
上述配合剤が添加された高分子重合体のエレクトレット
性については特に熱安定性が高く、１０．０６Ｃ以上に
おける熱刺激脱分極型゛流からのトラップ電荷量が２．
ＯＸｌ ０−１０クーロン／ ｃｍ ２以上を示し、過
酷な条件で使用されてもトラップ電荷量の低下は僅かで
ある。The electret property of the high molecular weight polymer to which the above-mentioned compounding agent is added has particularly high thermal stability, and the amount of trapped charge from heat-stimulated depolarization type flow at 10.06 C or higher is 2.
It exhibits OXl 0-10 coulombs/cm2 or more, and the amount of trapped charge decreases only slightly even when used under harsh conditions.
エレクトレット材料をろ過材として使用する場合、熱刺
激脱分極電流からのトラップ電荷量が２゜０ＸＩＯ−１
０ク一ロン／ｃｍ２以上であるエレクトレット材料が望
ましく、さらに望ましくは３゜５×ＩＱ−１ｎク一ロン
／ｃ１２以上のエレクトレット材料が好ましい。When using electret material as a filter material, the amount of trapped charge from heat-stimulated depolarization current is 2゜0XIO-1
An electret material having a coefficient of 0 coulons/cm2 or more is desirable, and more preferably an electret material having a coefficient of 3°5×IQ-1n coulons/c12 or more.
一方、２，６−ジーｔブチルーｐ−クレゾール（ＢＩＴ
と以後略称する）のような９分子量が小さい配合物は、
ペレタイズなどの加工性を上げるため配合しても良いが
、加工時の熱で、消費されたり、揮発したりするためエ
レクトレット材料の配合物としては不適当である。ジス
テアリルチオジプロピオネート（以後略称ＤＳＴＤＰ）
、ジラウリルチオジプロピオネート（以後略称ＤＬＴＤ
Ｐ）のような含硫黄系安定剤も、材料の耐熱安定性向上
で併用効果があるため配合されてもよいが。On the other hand, 2,6-di-t-butyl-p-cresol (BIT
Formulations with a small molecular weight such as
Although it may be blended to improve processability such as pelletizing, it is not suitable as a blend for electret materials because it is consumed or volatilized by the heat during processing. Distearylthiodipropionate (hereinafter abbreviated as DSTDP)
, dilaurylthiodipropionate (hereinafter abbreviated as DLTD)
A sulfur-containing stabilizer such as P) may also be blended since it has the effect of improving the heat resistance stability of the material.
熱刺激脱分極電流からのトラップ温度が低く熱に対する
安定性が低いため、エレクトレット材料の主配合物とし
ては不適当である。The low trapping temperature from thermally stimulated depolarizing currents and low thermal stability make them unsuitable as the main formulation for electret materials.
以下に実施例に従い本発明を説明する。The present invention will be described below with reference to Examples.
なお熱刺激脱分極電流からのトラップ電荷量の測定は次
の通りである。Note that the amount of trapped charge from the heat-stimulated depolarization current is measured as follows.
熱刺激脱分極電流からのトラップ電荷量の測定方法は、
第２図の模式図で示すように温度コントロール装置５を
有する加熱槽６の中に設置したエレクトレット材料４ａ
の両面を電極７，８て強くはさんで、この電極と高感度
電流計９を接続して測定する。 すなわち、加熱槽を一
定昇温速度。The method for measuring the amount of trapped charge from thermally stimulated depolarization current is as follows:
Electret material 4a installed in a heating tank 6 having a temperature control device 5 as shown in the schematic diagram of FIG.
The electrodes 7 and 8 are firmly sandwiched between both sides, and a high-sensitivity ammeter 9 is connected to the electrodes for measurement. In other words, the heating tank is heated at a constant rate.
例えば、室温から融点付近まで５°Ｃ／ｍｉｎで昇温す
ると、トラップされた電荷が脱分極して電流が流れる。For example, when the temperature is increased from room temperature to near the melting point at a rate of 5° C./min, the trapped charges are depolarized and a current flows.
この電流をデーター処理装置１０を経てレコーダー１１
に記録すると種々の温度領域に対する電流曲線かえられ
る（第３．４．５図）。This current is passed through the data processing device 10 to the recorder 11.
When recorded, the current curves for various temperature ranges can be changed (Fig. 3.4.5).
この電流曲線の面積を測定試料の面積で割った商（単位
：クーロン／ｃｍ２ ）をいう。It is the quotient (unit: coulomb/cm2) obtained by dividing the area of this current curve by the area of the measurement sample.
［実施例］
実施例及び比較例
ポリプロピレン１００部に対し、キマソーブ９４４ＬＤ
、イルガノックス１４２５ＷＬ、イルガノックス３１１
４．ＢＨＴ、ＤＳＴＤＴを第１表。[Example] Example and Comparative Example For 100 parts of polypropylene, Kimasorb 944LD
, Irganox 1425WL, Irganox 311
4. Table 1 shows BHT and DSTDT.
第２表のごとく配合し、ＭＩが５５のチップを作成した
。A chip with an MI of 55 was prepared by blending as shown in Table 2.
メルトブロ一方法により目付３０ｇ／イ、平均繊維径が
ほぼ３ミクロンになるようにメルトブロー紡糸し不織布
シートを得た。A nonwoven fabric sheet was obtained by melt blow spinning to obtain a fabric weight of 30 g/I and an average fiber diameter of approximately 3 microns.
このシートに第１図の装置によりエレクトレット加工を
施した。This sheet was subjected to electret processing using the apparatus shown in FIG.
条件は、印加電極として体積抵抗率１０−６Ω・ａｍの
鉄材の針状電極１を１本使用し、２０ｃｍ角の鉄板をア
ース電極２とし、アース電極２上にカーボン粒子を配合
したポリ塩化ビニルからなる厚さが０．５ｍｍ、２０ｃ
ｍ角の体積抵抗率１０４Ω’ ｃｍの半導性を有するシ
ート３を設置した。The conditions were as follows: One iron needle electrode 1 with a volume resistivity of 10-6 Ω/am was used as the application electrode, a 20 cm square iron plate was used as the earth electrode 2, and the earth electrode 2 was made of polyvinyl chloride mixed with carbon particles. The thickness is 0.5mm, 20c
A semiconducting sheet 3 having an m square volume resistivity of 104 Ω' cm was installed.
又２５°Ｃて湿度が６５％雰囲気で針状電極１と不織布
シート４との距離を５ｃｍとし印加電圧を一３０Ｋｖ、
印加時間１５ｓｅｃでエレクトレット加工を施した。Further, in an atmosphere at 25°C and 65% humidity, the distance between the needle electrode 1 and the nonwoven fabric sheet 4 was 5 cm, and the applied voltage was -30 Kv.
Electret processing was performed with an application time of 15 seconds.
エレクトレット加工された不織布シート４のエレクトレ
ットレベルを表面電荷密度、熱刺激脱分極電流からのト
ラップ電荷量で求めた結果は第３表、第４表の通りであ
る。Tables 3 and 4 show the results of determining the electret level of the electret-treated nonwoven fabric sheet 4 based on the surface charge density and the amount of trapped charge from the heat-stimulated depolarization current.
実施例１〜６の場合の配合は、トラップ電荷量は高く耐
熱性エレクトレット１才料として有用である。 実施例
２〜４の場合の配合は特に効果的であり高レベルで望ま
しい。The formulations in Examples 1 to 6 have a high amount of trapped charge and are useful as heat-resistant electret materials. The formulations in Examples 2-4 are particularly effective and desirable at high levels.
また、この実施例の場合、不織布シートの耐熱性（１３
０°Ｃて１６８時間処理前後からの引張強度保持率）も
優れていた。In addition, in the case of this example, the heat resistance of the nonwoven fabric sheet (13
The tensile strength retention rate before and after treatment at 0°C for 168 hours was also excellent.
一方、配合剤のほとんど入っていない比較例１゜の場合
トラップ電荷量はほとんど無い。 比較例２．３の場合
、ステアリン酸カルシウムで僅かにその効果が認められ
るがそのレベルは低い。また比較例４はペレタイズ化゛
、シート化の熱履歴でＢＨＴが消費されトラップ電荷量
は多くならない。On the other hand, in the case of Comparative Example 1°, which contains almost no compounding agent, there is almost no trapped charge amount. In the case of Comparative Example 2.3, calcium stearate has a slight effect, but the level is low. Further, in Comparative Example 4, BHT is consumed due to the thermal history of pelletizing and sheeting, and the amount of trapped charges does not increase.
また、この比較例の場合、不織布シートの耐熱性はいず
れの場合も劣っていた。Moreover, in the case of this comparative example, the heat resistance of the nonwoven fabric sheets was poor in all cases.
［発明の効果コ
本発明の耐熱性エレクトレット材料は上述のごとく、高
温サイドに高いトラップ電荷量を有することで、高温雰
囲気での使用に耐え、しかも長時間にわたり安定である
エレクトレット材料を提供する点にある。[Effects of the Invention] As mentioned above, the heat-resistant electret material of the present invention has a high amount of trapped charge on the high-temperature side, thereby providing an electret material that can withstand use in a high-temperature atmosphere and is stable over a long period of time. It is in.
従って、高温環境で使用される各種フィルター材料だけ
でなく、一般フイルター、ワイパー材料。Therefore, various filter materials used in high temperature environments, as well as general filter and wiper materials.
吸着材料、マスク部材、防塵衣部材などにも最適であり
、広汎な用途に用いることが出来る。It is also ideal for adsorption materials, mask parts, dustproof clothing parts, etc., and can be used for a wide range of applications.
第１図はエレクトレット加工を示す概略図である。
第２図は熱刺激脱分極電流からのトラップ電荷量の測定
方法を示す概略図である。
第３図はトラップ電荷のほとんどない熱刺激脱分極電流
曲線の１例、第４図はトラップ電荷が低温サイドである
熱刺激脱分極電流曲線の１例、第５図はトラップ電荷が
高温サイドである本発明の熱刺激脱分極電流曲線の１例
である。
に針状電極
２：アース電極
３：半導性を有するシート
４：不織布シート ゛
４ａ：エレクトレット材料
５：温度コントロール装置
６：加熱槽
７：電極
８：電極
９：高感度電流計
ｌＯ；データー処理装置
１１ニレコーダーFIG. 1 is a schematic diagram showing electret processing. FIG. 2 is a schematic diagram showing a method for measuring the amount of trapped charge from a thermally stimulated depolarizing current. Figure 3 shows an example of a heat-stimulated depolarization current curve with almost no trapped charges, Figure 4 shows an example of a heat-stimulated depolarization current curve with trapped charges on the low temperature side, and Figure 5 shows an example of a heat-stimulated depolarization current curve with trapped charges on the high temperature side. 1 is an example of a heat-stimulated depolarization current curve of the present invention. Needle-like electrode 2: Earth electrode 3: Semiconducting sheet 4: Nonwoven fabric sheet ゛4a: Electret material 5: Temperature control device 6: Heating tank 7: Electrode 8: Electrode 9: High-sensitivity ammeter IO; Data processing Device 11 recorder
Claims (1)
ンダードフェノール系、金属塩ヒンダードフェノール系
あるいはフェノール系の安定剤から選ばれた少なくとも
１種を配合してなる材料からなり、かつ１００℃以上に
おける熱刺激脱分極電流からのトラップ電荷量が２．０
×１０＾−＾１＾０クーロン／ｃｍ＾２以上である耐熱
性エレクトレット材料。(1) A material made of a polymer blended with at least one stabilizer selected from a hindered amine type, a nitrogen-containing hindered phenol type, a metal salt hindered phenol type, or a phenol type stabilizer, and The amount of trapped charge from the heat-stimulated depolarization current in the above is 2.0
A heat-resistant electret material having a coulomb/cm^2 or more of x10^-^1^0 coulombs/cm^2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11545487A JPS63280408A (en) | 1987-05-12 | 1987-05-12 | Heat resistant electret material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11545487A JPS63280408A (en) | 1987-05-12 | 1987-05-12 | Heat resistant electret material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63280408A true JPS63280408A (en) | 1988-11-17 |
| JPH0442812B2 JPH0442812B2 (en) | 1992-07-14 |
Family
ID=14662950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11545487A Granted JPS63280408A (en) | 1987-05-12 | 1987-05-12 | Heat resistant electret material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63280408A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993014510A1 (en) * | 1992-01-08 | 1993-07-22 | Toray Industries, Inc. | Antibacterial electret material |
| WO2013080955A1 (en) | 2011-11-28 | 2013-06-06 | 東レ株式会社 | Mixed fiber non-woven fabric and filter element using same |
| WO2013089213A1 (en) | 2011-12-16 | 2013-06-20 | 東レ株式会社 | Mixed-fiber non-woven fabric, laminate sheet, filter, and method for producing mixed-fiber non-woven fabric |
| WO2014168066A1 (en) | 2013-04-11 | 2014-10-16 | 東レ株式会社 | Mixed-fiber nonwoven fabric and method for manufacturing same |
| CN104147847A (en) * | 2014-02-20 | 2014-11-19 | 日本无机株式会社 | Air filtration material and air filtration unit |
| KR20190088476A (en) | 2016-12-08 | 2019-07-26 | 도레이 카부시키가이샤 | Electret fiber sheet |
| WO2019159654A1 (en) | 2018-02-15 | 2019-08-22 | 東レ株式会社 | Nonwoven fabric and air-filter filtering material using same |
| KR20220125248A (en) | 2020-01-23 | 2022-09-14 | 도레이 카부시키가이샤 | Electret melt blown nonwoven fabric, filter medium and air filter comprising the same, and manufacturing method of electret melt blown nonwoven fabric |
| KR20230031831A (en) | 2020-06-30 | 2023-03-07 | 도레이 카부시키가이샤 | Electret fiber sheets and laminated sheets and filters |
| WO2023063299A1 (en) * | 2021-10-13 | 2023-04-20 | 東洋紡株式会社 | Electret material, electret filter, and method for producing electret material |
| WO2023095799A1 (en) * | 2021-11-26 | 2023-06-01 | 東洋紡株式会社 | Electret and electret filter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61181511A (en) * | 1985-02-06 | 1986-08-14 | Toray Ind Inc | Filter medium |
| JPS6261311A (en) * | 1985-09-11 | 1987-03-18 | 三井化学株式会社 | High performance electret |
-
1987
- 1987-05-12 JP JP11545487A patent/JPS63280408A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61181511A (en) * | 1985-02-06 | 1986-08-14 | Toray Ind Inc | Filter medium |
| JPS6261311A (en) * | 1985-09-11 | 1987-03-18 | 三井化学株式会社 | High performance electret |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993014510A1 (en) * | 1992-01-08 | 1993-07-22 | Toray Industries, Inc. | Antibacterial electret material |
| US9180392B2 (en) | 2011-11-28 | 2015-11-10 | Toray Industries, Inc. | Mixed-fiber nonwoven fabric and filter medium using the same |
| WO2013080955A1 (en) | 2011-11-28 | 2013-06-06 | 東レ株式会社 | Mixed fiber non-woven fabric and filter element using same |
| KR20140101340A (en) | 2011-11-28 | 2014-08-19 | 도레이 카부시키가이샤 | Mixed fiber non-woven fabric and filter element using same |
| WO2013089213A1 (en) | 2011-12-16 | 2013-06-20 | 東レ株式会社 | Mixed-fiber non-woven fabric, laminate sheet, filter, and method for producing mixed-fiber non-woven fabric |
| KR20140108216A (en) | 2011-12-16 | 2014-09-05 | 도레이 카부시키가이샤 | mixed-fiber non-woven fabric, laminate sheet, filter, and method for producing mixed-fiber non-woven fabric |
| US9266046B2 (en) | 2011-12-16 | 2016-02-23 | Toray Industries, Inc. | Mixed-fiber nonwoven fabric, laminated sheet and filter, and process for producing mixed-fiber nonwoven fabric |
| KR20150140655A (en) | 2013-04-11 | 2015-12-16 | 도레이 카부시키가이샤 | Mixed-fiber nonwoven fabric and method for manufacturing same |
| WO2014168066A1 (en) | 2013-04-11 | 2014-10-16 | 東レ株式会社 | Mixed-fiber nonwoven fabric and method for manufacturing same |
| CN104147847A (en) * | 2014-02-20 | 2014-11-19 | 日本无机株式会社 | Air filtration material and air filtration unit |
| KR20190088476A (en) | 2016-12-08 | 2019-07-26 | 도레이 카부시키가이샤 | Electret fiber sheet |
| US11154803B2 (en) | 2016-12-08 | 2021-10-26 | Toray Industries, Inc. | Electret fiber sheet |
| WO2019159654A1 (en) | 2018-02-15 | 2019-08-22 | 東レ株式会社 | Nonwoven fabric and air-filter filtering material using same |
| KR20200116449A (en) | 2018-02-15 | 2020-10-12 | 도레이 카부시키가이샤 | Nonwoven fabric and air filter media made using the same |
| KR20220125248A (en) | 2020-01-23 | 2022-09-14 | 도레이 카부시키가이샤 | Electret melt blown nonwoven fabric, filter medium and air filter comprising the same, and manufacturing method of electret melt blown nonwoven fabric |
| KR20230031831A (en) | 2020-06-30 | 2023-03-07 | 도레이 카부시키가이샤 | Electret fiber sheets and laminated sheets and filters |
| WO2023063299A1 (en) * | 2021-10-13 | 2023-04-20 | 東洋紡株式会社 | Electret material, electret filter, and method for producing electret material |
| WO2023095799A1 (en) * | 2021-11-26 | 2023-06-01 | 東洋紡株式会社 | Electret and electret filter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0442812B2 (en) | 1992-07-14 |
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