JPS59154753A - Separator for alkaline cell - Google Patents

Abstract

PURPOSE:To improve alkali resistance and alkali oxidation resistance, etc. by machining a mixture of polyolefin resin, extractable organic material, inorganic fine powder, and non-ion surface active agent into a thin film and subjecting it to extracting treatment. CONSTITUTION:To 100pts.wt. of synthetic resin made of polyolefin resin or added with hydrophilic resin, about 50-250pts.wt. of extractable organic material such as di-2-ethyl hexyl phthalate, about 100-350pts.wt. of inorganic such as titanium oxide, and a proper quantity of non-ion surface active agent are added and kneaded. After this mixture is machined into a thin film shape, the extractable organic material is subjected to extracting treatment to form a separator by using a proper organic solvent. This separator for an alkaline cell has alkali resistance, alkali oxidation resistance, and heat resistance, and is excellent in the electric and mechanical performance, thereby the cell life is improved when it is assembled into a cell.

Description

【発明の詳細な説明】 本発明は、微多孔薄膜からなるアルカリ゛屯池用セパレ
ータに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a separator for an alkaline tank comprising a microporous thin film.

従来、多孔寅アルカリ゛祇池用セパンータとしては、耐
アルカリ性、銅アルカリ酸化性、耐熱性を有し、且つ適
当な機械的性能を有するポリオレフィン樹脂を素材とし
た膜に適当な方法で多数の孔を設けたもの、又耐アルカ
リ性材の微粉末を乳化■合や焼結の方法により多数の孔
を設けたもの等がある。然し、此等のセパレータは親水
性が不充分であり又孔径が大き過ぎるものもあって、金
属イオン透過阻止性が低下して薄膜物性に弱点を有し１
、且つ製造方法が複雑で、コスト市となり、実用上不適
当であった。Conventionally, as a porous alkali sepanter, a film made of a polyolefin resin that has alkali resistance, copper alkali oxidation resistance, heat resistance, and appropriate mechanical performance is made by forming a large number of pores by an appropriate method. There are also those with a large number of holes formed by emulsifying or sintering fine powder of alkali-resistant material. However, these separators have insufficient hydrophilicity and some have too large pore sizes, resulting in poor metal ion permeation blocking properties and weak film properties.
, and the manufacturing method was complicated and expensive, making it unsuitable for practical use.

又無機微粉体に液状の被抽出性有機物を混合吸おさせて
粉末状乃至顆粒状体とし、次にこれをポリオレフィン樹
脂に混練して、薄膜（＝成形し、次に該成形物を抽出処
理することよりなる多孔体のフィルムは公知であるが、
該成形物をつくるとき上記の如き混合吸着と混練の２段
階の混合作業を行うから製造工程はふえることとなる。In addition, a liquid extractable organic substance is mixed and sucked into an inorganic fine powder to form a powder or granule, which is then kneaded with a polyolefin resin to form a thin film (=formed), and then the molded product is subjected to extraction treatment. A porous film consisting of
When producing the molded article, the two-step mixing operation of adsorption and kneading as described above is performed, which increases the number of manufacturing steps.

尚このようにしてつくられた成形物は親水性が不充分な
のでセパレータとして電池に組立てたとき電池寿命が短
くなる欠点がある。The molded product produced in this manner has insufficient hydrophilicity, so when assembled into a battery as a separator, the battery life is shortened.

又ポリオレフィン樹脂に無機充填剤を混合し、シートに
成形し２、次龜該レートを抽出処１するこ□とよりな６
多孔質薄、、晒も公知１ある力゛・該シート・で充分な
空孔率を得るためには延伸加工が必要で□・あり、その
結果孔：径が□大メケって金属イオン透過阻止性が低下
しＪセパレニタとして薄膜の物性が不充分である。Alternatively, the polyolefin resin is mixed with an inorganic filler, formed into a sheet, and then the rate is extracted.
In order to obtain sufficient porosity with a well-known force in porous thin sheets, bleaching requires stretching, and as a result, the pores are enlarged in diameter and metal ions permeate. The blocking properties are reduced and the physical properties of the thin film are insufficient as a J separator.

本発明は叙上の点を鍾みてなされたものであって、耐ア
ルカリ性、耐アルカリ酸化性、耐熱性に優れ、適当な機
械的性能を、有し、且つ親水性にも富む−ｆ７　／（Ｌ
／　−５を開発し・本ｊ′＜ｌｉ−夕で電池を組立たと
き電池寿命４台性の著′７：！Ｌ＜向上することを目的
としたものである。則ち、ポリオレフィン樹脂に有機液
状の被抽出性物と無機微粉体と非イオン性界面活性剤と
を添加１シ、・、：それらを直ちに混練して混和物とな
し、該混和物を薄膜状に加工した後、該薄膜を抽出処理
することからなるアルカリ電池用セパレータである。合
成樹脂、被抽出性有機物、無機微粉体、非イオン性界面
活性剤の混和物中の被抽出性有機物は合成樹脂７００重
量部（以下部と称す）に対してＩＯ乃至２よ０部であり
、鋸機、微粉体は１００乃至３θＯ部である。又非イオ
、ンり面活性剤も一一に混練するこ、どは９．れによっ
てつくられたセパレータの親水性を祷続させ電池寿命特
性を向上させるためである。The present invention has been made in consideration of the above points, and has excellent alkali resistance, alkali oxidation resistance, heat resistance, appropriate mechanical performance, and is also rich in hydrophilicity. L
/-5 was developed and the battery life was 4 units when the battery was assembled in the book '7:! The purpose is to improve L<. That is, an organic liquid extractable material, an inorganic fine powder, and a nonionic surfactant are added to a polyolefin resin. This is a separator for alkaline batteries, which is obtained by processing the thin film into a thin film and then subjecting it to extraction treatment. The amount of extractable organic matter in the mixture of synthetic resin, extractable organic matter, inorganic fine powder, and nonionic surfactant is IO to 20 parts per 700 parts by weight of synthetic resin (hereinafter referred to as "parts"). , saw machine, fine powder is 100 to 3θO parts. Also, non-ionic and non-ionic surfactants should be kneaded together in step 9. This is to maintain the hydrophilicity of the separator made by this and improve battery life characteristics.

次に本発明に用いる化学組成について更に詳しく述べる
。ポリオレフィン樹脂とはポリオレフィン樹脂単独又は
これに親水婢樹脂を加えた合成樹脂な菖い、ポリオレフ
ィン樹脂には低密度、中密度および高密度のｆ？、エチ
レン１．ならび１ニプロビレンホモボリマー、ｚ、ｊ、
レン・プ、ロビレンランダム共亜合体、エチレン・テ、
シビンンブ、ロック共重合体、ポリブテン／なく・、の
・・′７種又はコ種以上の混合物を用い、これらのメ、
／ｌ／’）インデックスＭＩは１２０／〜／θが好まし
い。ＭＩが０．０７より小さい樹脂は混練ならびに成形
□時に靴動性が悪ぐ、またＭＩがＩＯより大きいものは
薄膜に成形したときの機械的性能が悪くなる。Next, the chemical composition used in the present invention will be described in more detail. Polyolefin resin is a synthetic resin consisting of polyolefin resin alone or a hydrophilic resin added to it. Polyolefin resin has low density, medium density and high density f? , ethylene 1. and 1 nipropylene homobolymer, z, j,
Ren Pu, Robylene Random Coagulation, Ethylene Te,
Shibinbu, rock copolymer, polybutene/non...' using a mixture of 7 or more types,
/l/') Index MI is preferably 120/ to /θ. Resins with an MI of less than 0.07 have poor shoe performance during kneading and molding, and resins with an MI greater than IO have poor mechanical performance when formed into a thin film.

被抽出性有機物とはポリオレフィン樹脂の加工温度の範
囲で液体である有機物で有機溶剤で抽出用能なものｆ（
らはよく、例えば′だ温で固形のものとしてはパラフィ
ン、塩化パラフィン等があり、液体のものでは、フタル
酸ジコーエテルヘキシル、フタル酸ジイソデシル、トリ
メリット酸トリコーエチルヘキシル、フタル酸ジブチル
等のフタル酸エネテル、ボリエデレングリコール、トリ
エチレングリコール、グリセリン、ポリプロ・ピレング
リ、コール等のグリ、コニニル知及びそれらのエーテル
類、セパシン酸ジコーエテルヘキ・シル、セバシン酸ジ
ブチル等のエステル類、ナフサ等の石油系炭化水系、ポ
リブテン等のオイル等である。□これら被抽出性有機物
の添加量ゆ前述したよう（″−含成樹脂７６　ｏ　部に
対してＪ′Ｏ−２よρ部であるが若しこの添加量が！θ
郡より小さいときは条孔性が充分でなくなり、また２Ｉ
Ｏ部より大きいときは樹脂への溶解力上飽和し、″ｙ：
混和が置県となる。　　。Extractable organic substances are organic substances that are liquid within the processing temperature range of polyolefin resins and that can be extracted with organic solvents.
For example, paraffin and chlorinated paraffin are solid at room temperature, and phthalates such as dicoethylhexyl phthalate, diisodecyl phthalate, tricoethylhexyl trimellitate, and dibutyl phthalate are liquid. Acid enether, polyethylene glycol, triethylene glycol, glycerin, polypropylene glycol, glycerol such as coal, esters such as dicoetherhexyl sepacate, dibutyl sebacate, petroleum-based products such as naphtha, etc. Hydrocarbon oils, polybutene oils, etc. □As mentioned above, the amount of these extractable organic substances added is ρ parts of J'O-2 relative to 76 o parts of the resin, but if this amount is !θ
When the size is smaller than 2I, the pore quality is insufficient, and 2I
When it is larger than O part, it is saturated in terms of its ability to dissolve the resin, and ``y:
Mixture becomes the prefecture. .

、無機微粉体とは酸化チタン、酸化ジルコニウム、カー
ボンブラック、舞水迂酸、珪酸カルシウム、１１酸アル
ミニクム、アルミナ１、炭酸カルシウム、炭酸マグネシ
ウム、タルク、マイカ、グラファイト、硫酸バリウムＪ
↓藻土、アスベスト等又はこれらの混合物でよく、出来
る丈撤粒、子のものがよく、１０〜／　００ＷＬμのも
のが好ま・□しい。これら微粉体の樹脂への添加量は、
前述したように合成樹・、脂１００部（二対して７ｏｏ
〜３．！Ｏ：部で：ある・を添加量が１００部より少な
いと多孔性が失われ電、気、抵抗が大となり１．３！θ
部より多いと薄膜成形がしにくくなる。, Inorganic fine powders include titanium oxide, zirconium oxide, carbon black, maizui oxidation, calcium silicate, aluminum 11ate, alumina 1, calcium carbonate, magnesium carbonate, talc, mica, graphite, barium sulfate J
↓Algae, asbestos, etc., or a mixture thereof may be used, and those with a particle size of 10 to 00 WLμ are preferable. The amount of these fine powders added to the resin is
As mentioned above, 100 parts of synthetic resin and resin (70 parts for 2 parts)
~3. ! O: parts: If the amount added is less than 100 parts, the porosity will be lost and the electric, air, and resistance will become large and 1.3! θ
If the amount exceeds 30%, it becomes difficult to form a thin film.

非イオン性界面活性剤とは、形成された薄膜に親水性を
与えるとともに薄膜の形成を容易ζユするための可塑剤
としての効果も併せ有するもので、分解温度がポリオレ
フィンの加工温度より高く、比表面張力低下能の大きい
ものが好ましい。例：えは、ラウリルエーテル系ンノニ
・ル］岨ニルエーテル系、オクチルフェノール系、アル
キルアリルエーテル系、ノニルフェノール系、脂肪酸系
等で特に好まし、いのは脂肪酸系中の脂肪酸アミド系で
分・千盪が７０〉！θＯのものである。　　　□　゛本
発明において、合成樹脂としてはポリオレフイン樹脂の
みでもよいが親水性樹ｍｌを加えることが親水性を更に
同上させるので好ましい。親水性樹脂とはポリビニルア
ルコールか、特に望ましいのはエチレン−ビニルアルコ
ール共重合体でビニルアルコール成分含量は３０〜７！
％が特によい。Nonionic surfactants provide hydrophilicity to the formed thin film and also act as plasticizers to facilitate the formation of the thin film, and their decomposition temperature is higher than the processing temperature of polyolefin. Those having a large ability to lower specific surface tension are preferred. Examples: Particularly preferred are lauryl ether type, nnonyl ether type, octylphenol type, alkyl allyl ether type, nonylphenol type, fatty acid type, etc.; is 70〉! It is of θO. □ ゛In the present invention, polyolefin resin alone may be used as the synthetic resin, but it is preferable to add a hydrophilic resin because it further improves hydrophilicity. The hydrophilic resin is polyvinyl alcohol, particularly preferably ethylene-vinyl alcohol copolymer, with a vinyl alcohol component content of 30 to 7!
% is particularly good.

ビニルアルコールの含量が多いと融点が商くなり、ポリ
オレフィンとの混和性が少なくなり加工性が低下し５、
その含量が少なくなると親水性が低下する。親水性樹脂
の添加量はポリオレフィン樹脂７００部に対してθ〜２
０θ都でよい。When the content of vinyl alcohol is high, the melting point becomes low, the miscibility with polyolefin decreases, and the processability decreases5.
When its content decreases, hydrophilicity decreases. The amount of hydrophilic resin added is θ~2 with respect to 700 parts of polyolefin resin.
0θ capital is sufficient.

本発明において上述した組成成分に更に抗酸化剤、紫外
線吸収剤、滑剤、成形助剤、老化防止剤等も本発明の効
果を特に阻害しない限り添加してもよい。In the present invention, antioxidants, ultraviolet absorbers, lubricants, molding aids, anti-aging agents, etc. may also be added to the above-mentioned composition components as long as they do not particularly impede the effects of the present invention.

次に本発明における混練成形方法は一般的なプラスチッ
ク混線方法でよく、例えはバンバリーミキサ、ニーダ−
１熱ロール、カレンダーロール、押出機等でよい。連続
的にフィルム成形するためには混線性を考慮した場合λ
軸押出機かカレンダーロールを用いることが好ましい。Next, the kneading and forming method in the present invention may be a general plastic mixing method, such as a Banbury mixer, a kneader, etc.
1 heat roll, calender roll, extruder, etc. may be used. In order to continuously form a film, considering crosstalk, λ
Preferably, a screw extruder or calender roll is used.

又薄膜成形方法は押出機の場合はＴダイを用いるがあら
かじめシート状に押出したものを圧延ロール等で薄膜化
する方法でもよい。又峨熱または蒸気による熱プレスを
用いてもよい。又押出により得られたフィルムが厚い場
合、／軸又はλ軸方向に延伸してもよいが延伸倍率は体
積倍率で７０倍までよいがこれ以上延伸すると微孔の孔
径が太き（なり過ぎて好ましくない。In the case of a thin film forming method, a T-die is used in the case of an extruder, but it may also be a method of extruding a sheet in advance and forming it into a thin film using a rolling roll or the like. Alternatively, a heat press using superheat or steam may be used. If the film obtained by extrusion is thick, it may be stretched in the direction of the /axis or the Undesirable.

薄膜の厚さは２Ｑμから３０θμ　が望ましく、更に好
ましくは３０〜２Ｑθμである。これは薄膜の機械的お
よび電気的特性によるほか、セパレータを極板に巻く場
合の作業性ならびにセパレータを巻いて組立てた極板群
の厚みなどを考慮したものである。The thickness of the thin film is preferably 2Qμ to 30θμ, more preferably 30 to 2Qθμ. This is based on the mechanical and electrical properties of the thin film, as well as the workability of winding the separator around the electrode plates and the thickness of the assembled electrode plate assembly by winding the separator.

次に被抽出性有機物の抽出処理について述べる。Next, the extraction process of extractable organic matter will be described.

抽出処理は上述の如（混練成形された薄膜中に分散して
いる有機液状体の被抽出性有機物を溶解するが樹脂を溶
解しない条件で行わなければならないので、通常アセト
ン、ベンゼン、キシレン、ノルマルヘキチン、エタノー
ル、メタノール等のアルコール類、四塩化炭素、クロロ
ホルム等の有機溶剤を用いて常温からｔＯｃＯの温度範
囲で行ってよい。The extraction process must be carried out as described above (usually using acetone, benzene, xylene, or The reaction may be carried out at a temperature range from room temperature to tOcO using alcohols such as hexitine, ethanol, and methanol, and organic solvents such as carbon tetrachloride and chloroform.

抽出により親水性が失われた場合は界面活性剤で表面処
理を行ってもよい。If hydrophilicity is lost due to extraction, surface treatment may be performed with a surfactant.

次に本発明の実施例について述べる。（以下部とあるは
いずれも重量部を指す。） 実施例／ 組成は第７表に示したように合成樹脂としてのＭＩθ７
の中密度ポリエチレン／３部とビニルアルコール含量４
’０％のエチレン・ビニルアルコール共重合体り部、被
抽出性有機物としてフタル酸ジコーエチルヘギシル３０
婦、無機微粉体として平均粒径グ０四μのアナターゼ型
酸化テタングθ部、更にＲ−ｃ−Ｎ−（ＯｚＨｌｌｏＨ
）２で示されるアミン１ 系界面活性剤ユ、コ部、ビスフェノール系老化防止剤９
０２部を加え混合した後、試験用ニーダ−（二て混練し
、／♂θ０Ｃの熱プレスにより薄膜にした。Next, examples of the present invention will be described. (All parts hereinafter refer to parts by weight.) Example/The composition is as shown in Table 7, with MIθ7 as a synthetic resin.
Medium density polyethylene/3 parts and vinyl alcohol content 4 parts
'0% ethylene/vinyl alcohol copolymer content, dicoethylhegysyl phthalate 30 as extractable organic matter
Anatase-type tetane oxide θ part with an average particle size of 04μ as an inorganic fine powder, and R-c-N-(OzHlloH
) Amine 1-based surfactant represented by 2, Bisphenol-based anti-aging agent 9
After adding and mixing 2 parts of 0.02 parts, the mixture was kneaded using a test kneader (two times) and formed into a thin film by hot pressing at /♂θ0C.

比較例として第１表に示すように実施例／の組成中、親
水性樹脂を添加せず又界面活性剤をソルビタンモノステ
アレート※としたもの（比較例／−／）、界面活性剤を
添加しなかったもの（比較例／−２）、無機微粉体を添
加しなかったもの（比較例／−３）、被抽出性有機物を
添加しなかったもの（比較例／−１）、親水性樹脂のビ
ニルアルコール含量を？θ％※※と大量にしたもの（比
較例／−りなどの！種類の実施例とは組成の異った比較
例のものをそれぞれ混練したところ、比較例／−３、は
微粉体がなかったので有機物が実質的に多過ぎ／−４、
は有機物がなかったので微粉体の量が重質的に多過ぎ、
また比較例／−！は親水樹脂のビニルアルコール量が多
過ぎ樹脂の相溶性が悪く、均一に混練することが不可能
であった。比較例／−／、／−λは実施例と同じ工程を
経て薄膜をつくり、実施例と共に常温のアセトン中に２
時１間浸漬して抽出処理を行い、ダイヤルゲージで膜厚
を測定し、Ｋ７ｔ’ｉ／ｌのＫＯＨ溶液（３０°Ｃ）中
にて電気抵抗を測定した。測定結果は第１表に示したよ
うに本発明による実施例は比較例に比べて膜厚の薄いも
のができるし電気抵抗も小で竺れた薄膜特性紮ホした。As a comparative example, as shown in Table 1, in the composition of Example /, no hydrophilic resin was added and the surfactant was sorbitan monostearate* (Comparative Example /-/), and a surfactant was added. (Comparative Example/-2), No inorganic fine powder was added (Comparative Example/-3), No extractable organic matter was added (Comparative Example/-1), Hydrophilic resin What is the vinyl alcohol content? When we kneaded the comparative examples with different compositions from the !type examples such as θ%※※ (comparative example/-3), there was no fine powder in comparative example/-3. Therefore, the organic matter was substantially too high/-4,
Since there was no organic matter, the amount of fine powder was extremely large,
Comparative example/-! Since the amount of vinyl alcohol in the hydrophilic resin was too large, the compatibility of the resin was poor, and it was impossible to knead uniformly. Comparative Examples /-/, /-λ were made through the same process as in the example, and 2
The sample was immersed for 1 hour for extraction treatment, and the film thickness was measured using a dial gauge, and the electrical resistance was measured in a K7t'i/l KOH solution (30°C). As shown in Table 1, the measurement results showed that the examples according to the present invention were thinner than the comparative examples, had lower electrical resistance, and had excellent thin film characteristics.

第　　　　ン　　　　表 実施例コ 実施例／の組成中ポリエチレンの代りにＭＩ　／。Table Example MI/ instead of polyethylene in the composition of Example/.

のエチレン・ブ、ロビ、レンブロック共重合体（エチＬ
／ン含量／３％）とし被抽出性有、欅物なトリ・メリッ
ト酸トリマーエテルへ、キシルとし、他は・実施例／と
同一としたものをミキサーで混合した。一方、比較例２
−　／、件しては平均粒子径／／邊μの無水微粉シリカ
７１部にフタル酸ジλ−エテルヘキシル６０部に一端混
合吸着させＮＪ籾粒状し、、次にこれをＭ、Ｉ／の中密
度ポリ・エテ・レン、、２２部と混合した６又比較例２
−２としてＭ　、　Ｉ　、、／、、、、、、の中密度、
ボリエ・チ、レン／θＯ部に平抱粒子径３θ轟μ・の炭
、酸カルシウム１００部ならびに脂肪酸アミド系界面活
性剤７０部とをミキサーで混合した。以上の組成を第−
表に示す。次に第２表に示すＺ種の混和物を３０％φコ
軸押出機にてそれぞれ混練し、ペレット化し、該ペレッ
ト全４ｔＯｏ＃ａｌＩ＋巾のフィルムダイを装着した１
３φ単軸押出機でフィルムに押出した。これらのフィル
ムのうち実施例／、２比較例λ−／の３種のフィルムは
常温のアセトン中にコ時間浸□漬し、抽出処理を行った
。□比較例λ−一のフィルムを体積倍率で３倍となるよ
うに延伸し、厚さ１００ｐとし、□後／規定のＨｃ　ｔ
　”　（常温）中にｊ時間漫潰七、抽出処理を行った。Ethylene block copolymer, Robi, Ren block copolymer (ethyl
Extractable tri-mellitic acid trimer ether (concentration: 3%) was mixed in a mixer with xyl, which was otherwise the same as in Example. On the other hand, comparative example 2
In this case, 71 parts of anhydrous fine powder silica with an average particle size of //μ is mixed and adsorbed with 60 parts of diλ-ethylhexyl phthalate to form NJ rice granules, and then this is mixed into M, I/ 6-prong comparative example 2 mixed with 22 parts of density polyethylene.
−2 as M , I , /, , , medium density,
100 parts of calcium oxide, charcoal having an average particle size of 3θ and 70 μm, and 70 parts of a fatty acid amide surfactant were mixed in a mixer with part of Borie, Ren/θO. The above composition is
Shown in the table. Next, the mixtures of type Z shown in Table 2 were kneaded and pelletized using a 30%φ coaxial extruder, and the pellets were made into pellets using a film die with a width of 4tOo#alI+1.
It was extruded into a film using a 3φ single screw extruder. Among these films, three types of films, Example/2 and Comparative Example λ-/, were immersed in acetone at room temperature for a period of time and subjected to extraction treatment. □The film of Comparative Example λ-1 was stretched to 3 times the volume magnification to a thickness of 100p, □After/specified Hc t
The extraction process was performed for seven hours at room temperature (at room temperature).

このようにして得られた薄膜の物性を第３・表に示す。The physical properties of the thin film thus obtained are shown in Table 3.

尚測定方法は次の如く膜厚測定はダイヤルゲニジ（ユよ
り、□孔径測定は電子顕微鏡により、□気孔率は空孔容
積／多孔体容積×１００で、空孔容積は含水重量−乾燥
重容と□した。The measurement method is as follows: film thickness is measured using a dial gauge (U), □ pore size is measured using an electron microscope, □ porosity is calculated as pore volume/porous body volume x 100, and pore volume is calculated as water content - dry weight. □I did.

電気抵抗はＹ７ｆＦ！／ｌのＫＯＨを電解液として３０
００で測定。耐アル１ガリ性は４ｔ７１Ｐ／ｂのＫＯＨ
。Electrical resistance is Y7fF! /l of KOH as electrolyte
Measured at 00. Al 1 gali resistance is 4t71P/b KOH
.

１０００中に一２０時１間浸漬後の重量減少で表した。It was expressed as the weight loss after being immersed in 1,000 ml for 120 hours.

第３表によれば実施例１およびコは膜が比較例の第・−
表 ・　　　　　　　■　　　　　　・　　　　　１．。According to Table 3, the membranes of Example 1 and Co are comparative examples.
Table ・ ■ ・ 1. .

膜よりも薄いものができて電気抵抗が低く、又！アルカ
リ、性が・良伝が比較例−一／は膜が厚く、耐アルカリ
性が悪く　（無水微粉シリカがアルカリに溶出するため
）また比較例トくは電気抵抗が大きく孔径が大きい。It can be made thinner than a membrane and has low electrical resistance, and! Comparative Example 1 has a thick film and poor alkali resistance (because the anhydrous fine powder silica dissolves in alkali), and Comparative Example 1 has a high electrical resistance and a large pore size.

実施例３ 次に第３表に示すような７種の薄膜をセパレータとし、
電解液にグθ％ＫＯＨ水溶液を、電極にニッケル板と亜
鉛板を用いて、容量／θＡＨのり種のニッケル亜鉛電池
を組立てた。次に７０回の予備放電の後、充電量／　２
　Ａ　Ｈで／／２ｃ、ＩＣの放電試験を行い、初期特性
を測定した。その結果を第９表に示す。第ｙ表によれば
実施例／およびコは比較例コー／、およびコーコに比し
て電池容量ならびに平均′磁圧の点で優れた特性を示し
ている。Example 3 Next, seven types of thin films as shown in Table 3 were used as separators,
A nickel-zinc battery with a capacity/θAH ratio was assembled using a GH% KOH aqueous solution as an electrolyte and a nickel plate and a zinc plate as electrodes. Then after 70 pre-discharges, the charge amount / 2
At AH // 2c, a discharge test of the IC was conducted and the initial characteristics were measured. The results are shown in Table 9. According to Table y, Example/Co shows superior characteristics in terms of battery capacity and average magnetic pressure compared to Comparative Examples Co/ and Coco.

次にこれらの電池の充放電寿命試験を工Ｏの放電条件で
行った。その結果を図に示す。図の縦軸は電池容量、横
軸はサイクルを示し、線／は実施例／、ツは実施例コ、
コー／は比較例コー７、コーコは比較例コーコを示す。Next, a charge/discharge life test of these batteries was conducted under a discharge condition of 0. The results are shown in the figure. The vertical axis of the figure shows the battery capacity, the horizontal axis shows the cycle, the line / is the example /, tsu is the example,
Co/ indicates Comparative Example Co 7, and Coco indicates Comparative Example Coco.

図によれば本発明による実施例／およびコはサイクル寿
命の優れていることがわかる。According to the figure, it can be seen that the embodiments according to the present invention have excellent cycle life.

上述したように、本発明によるアルカリ電池用セパレー
タは耐アルカリ性、耐アルカリ酸化性、を有ｔ１１、且
つ電気的、機械的性能に優れ電池に組立てたとき優れた
電池寿命を有する。As described above, the alkaline battery separator according to the present invention has alkali resistance and alkali oxidation resistance of T11, and has excellent electrical and mechanical performance, and has an excellent battery life when assembled into a battery.

第ダ表 弘　簡単な図面の説明 図は本発明による実施例と比較例との′４池サイクル寿
命試験結果を示す。Table 1: A simple explanatory diagram showing the results of a 4-cell cycle life test for an example according to the present invention and a comparative example.

／：実施例／ 、２：実施例ツ ツー／：比較例コー／ コー２：比較例コー＝/:Example/ , 2: Example Two/: Comparative example/ Co2: Comparative example Co=

Claims (3)

【特許請求の範囲】[Claims] （１）　　ポリオレフィン樹脂に被抽出性有機物と無機
微粉体と非イオン性界面活性剤とを混練して混和物とな
し、該混和物を薄膜状に加工した後、該薄膜を抽出処理
することからなるアルカリ電池用セパレータ。(1) By kneading extractable organic matter, inorganic fine powder, and nonionic surfactant into a polyolefin resin to form a mixture, processing the mixture into a thin film, and then subjecting the thin film to extraction treatment. A separator for alkaline batteries. （２）上記混和物中の被抽出性有機物の祉はポリオレフ
ィン樹脂／　００恵Ｑ部に対して！０乃至２！θ重量部
であることよりなる特許請求の範囲第／項記載のセパレ
ータ。(2) The welfare of the extractable organic matter in the above mixture is relative to the polyolefin resin/00 Megumi Q part! 0 to 2! The separator according to claim 1, wherein the separator is θ parts by weight. （３）上記混和物中の無機微粉体の量はポリオレフイン
樹脂１０θＭ嵐部に対して１００乃至３！Ｏ重量部であ
ることよりなる特許ｔ６求の）ＩＱ囲第／項又は第２項
記載のセパレータ。(3) The amount of inorganic fine powder in the above mixture is 100 to 3! 0 parts by weight of the separator according to paragraph 1 or 2 of the IQ section of patent t6.