JPH076746A - Battery separator - Google Patents
Battery separatorInfo
- Publication number
- JPH076746A JPH076746A JP5147961A JP14796193A JPH076746A JP H076746 A JPH076746 A JP H076746A JP 5147961 A JP5147961 A JP 5147961A JP 14796193 A JP14796193 A JP 14796193A JP H076746 A JPH076746 A JP H076746A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- battery separator
- fiber
- separator
- core
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Cell Separators (AREA)
- Secondary Cells (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はニッケルカドミウム蓄電
池、ニッケル水素蓄電池等のアルカリ蓄電池に用いる、
工程通過性、保液性、遠心脱水保液性に優れたセパレー
タに関するものである。BACKGROUND OF THE INVENTION The present invention is used in alkaline storage batteries such as nickel-cadmium storage batteries and nickel-hydrogen storage batteries.
The present invention relates to a separator excellent in process passability, liquid retention, and centrifugal dehydration liquid retention.
【０００２】[0002]
【従来の技術】一般に電池用セパレータに対する要求性
能は正負極間の隔離による短絡防止、及び電池反応に必
要となる電解液の保持であり、さらに工程通過性も重要
な要求性能である。また近年、ポータブル機器の需要の
増大に伴い、アルカリ蓄電池等二次電池の需要も増大
し、さらに使用条件が過酷なものへの適応・長寿命化に
対する改善が必要かつ重要となっている。アルカリ蓄電
池用セパレータとしては、電解液に高濃度の水酸化カリ
ウムを主成分とするアルカリ水溶液を使用しているので
耐アルカリ性に優れているポリアミド系繊維やポリオレ
フィン系繊維の不織布が広く使用されてきた。2. Description of the Related Art Generally, required performance for a battery separator is prevention of short circuit by separating positive and negative electrodes and retention of an electrolytic solution necessary for battery reaction, and process passability is also an important required performance. In addition, in recent years, along with the increase in demand for portable devices, the demand for secondary batteries such as alkaline storage batteries has also increased, and it has become necessary and important to adapt to severe operating conditions and to improve longevity. As an alkaline storage battery separator, a non-woven fabric of polyamide fiber or polyolefin fiber, which is excellent in alkali resistance, has been widely used because it uses an alkaline aqueous solution whose main component is high-concentration potassium hydroxide. .
【０００３】[0003]
【発明が解決しようとする課題】ところで、ポリアミド
系不織布を使用した電池用セパレータは、充電時に発生
する酸素ガスにより酸化されて劣化するという大きな欠
点がある。更に、アルカリ二次電池用のポリアミド系繊
維のセパレータにあっては、高温（６０〜８０℃）での
電解液中における激しい電池反応に対する耐酸化性に劣
ることから早期に劣化現象が現れるという問題があっ
た。By the way, a battery separator using a polyamide non-woven fabric has a major drawback that it is oxidized and deteriorated by oxygen gas generated during charging. Further, in a polyamide-based fiber separator for an alkaline secondary battery, a deterioration phenomenon appears early because of its poor oxidation resistance against a severe battery reaction in an electrolytic solution at a high temperature (60 to 80 ° C.). was there.
【０００４】一方、ポリオレフィン繊維を使用する電池
用セパレータは、耐薬品性に優れているという利点があ
る反面、親水性に劣るため電解液の液保持性が低い。こ
のため、液中での電気抵抗が高く充放電サイクル寿命特
性が劣る、発生するガスの透過性が悪く密閉型電池では
充電時に内圧が上がって破裂する危険がある等の問題が
あった。On the other hand, a battery separator using a polyolefin fiber has an advantage that it is excellent in chemical resistance, but on the other hand, since it is inferior in hydrophilicity, it has a low electrolyte retaining property. Therefore, there are problems that the electric resistance in the liquid is high, the charge / discharge cycle life characteristics are inferior, the permeability of the generated gas is poor, and the sealed battery has a risk of bursting due to an increase in internal pressure during charging.
【０００５】前記ポリアミドの耐酸化性を改善するため
に、ポリアミド繊維とポリオレフィン繊維とを複合化す
ることが提案されているが、これは酸化分解する繊維の
混率が全体として減るので劣化を軽減できるという程度
に留まり、根本的な解決とはならない。In order to improve the oxidation resistance of the polyamide, it has been proposed to combine polyamide fiber and polyolefin fiber, but this can reduce deterioration because the mixing ratio of fibers that undergo oxidative decomposition decreases as a whole. However, it is not a fundamental solution.
【０００６】またポリオレフィンの親水性を改良する技
術として、ポリオレフィン繊維のセパレータを発煙硫酸
またはクロル硫酸で処理してスルフォン化する方法、熱
濃硫酸で処理してスルフォン化する方法、三酸化イオウ
（ＳＯ3 ）ガス中で処理してスルフォン化する方法、電
子線照射によってアクリル酸やメタクリル酸をグラフト
重合する方法など多くの方法が提案されているが、シー
ト状物に激しい強力低下をきたしたり外観が大変悪くな
る、工業的に安定に生産できない等の問題があり量産す
るには至っていない。Further, as a technique for improving the hydrophilicity of polyolefin, a method of treating a polyolefin fiber separator with fuming sulfuric acid or chlorosulfuric acid to form a sulfonate, a method of treating with a hot concentrated sulfuric acid to form a sulfonate, and sulfur trioxide (SO 3 ) Many methods have been proposed, such as a method of treating with sulfonation by treatment in gas, a method of graft-polymerizing acrylic acid or methacrylic acid by electron beam irradiation. It has not been mass-produced due to problems such as very bad quality and industrially unstable production.
【０００７】本発明は、極めて簡単な方法でセパレータ
性能として重要な工程通過性、保液性、遠心脱水保液性
を改善し、高性能のアルカリ蓄電池用セパレータを提供
するものである。The present invention provides a high-performance alkaline storage battery separator that improves the process passability, liquid retention and centrifugal dehydration liquid retention, which are important as separator performance, by an extremely simple method.
【０００８】[0008]
【課題を解決するための手段及び作用】本発明は、上記
課題を達成するために以下の手段をとる。すなわち、本
発明は、ポリスルフォン及び／又はポリエーテルスルフ
ォン１５〜４０重量％、ポリ塩化ビニル２０〜４０重量
％及びメタクリル酸エステル系重合体２０〜６５重量％
との混合重合体よりなる繊維９０〜２０重量％と、芯成
分が鞘成分より融点の低いポリオレフィン系芯鞘型複合
繊維１０〜８０重量％から成るシート状物に、親水加工
を施したことを特徴とする電池用セパレータである。The present invention employs the following means in order to achieve the above-mentioned object. That is, the present invention includes polysulfone and / or polyether sulfone 15 to 40% by weight, polyvinyl chloride 20 to 40% by weight, and methacrylic acid ester polymer 20 to 65% by weight.
A sheet-like material comprising 90 to 20% by weight of a fiber made of a mixed polymer of 10 to 80% by weight of a polyolefin-based core-sheath type composite fiber having a core component having a lower melting point than that of a sheath component, is subjected to a hydrophilic treatment. A characteristic battery separator.
【０００９】本発明の電池用セパレータのシート状物を
構成する繊維の１つは、ポリスルホン（以下ＰＳＦと略
称する）及び／又はポリエーテルスルホン（以下ＰＥＳ
Ｆと略称する）、ポリ塩化ビニル（以下、ＰＶＣと略称
する。）、メタクリル酸エステル系重合体（以下、メタ
クリレート系重合体と略称する。）の混合重合体よりな
るが、これらの混合比率はＰＳＦ及び／又はＰＥＳＦ１
５〜４０重量％、ＰＶＣは２０〜４０重量％、メタクリ
レート系重合体は２０〜６５重量％であり、これらの混
合比率の範囲を外れると、繊維の紡糸性、寸法安定性、
及び強伸度特性に悪影響を及ぼす。One of the fibers constituting the sheet-like material of the battery separator of the present invention is polysulfone (hereinafter abbreviated as PSF) and / or polyether sulfone (hereinafter PES).
F), polyvinyl chloride (hereinafter abbreviated as PVC), and methacrylic acid ester-based polymer (hereinafter abbreviated as methacrylate-based polymer). PSF and / or PESF1
5 to 40% by weight, PVC is 20 to 40% by weight, and methacrylate polymer is 20 to 65% by weight. If the mixing ratio of these is out of the range, the fiber spinnability, dimensional stability,
And adversely affect the strength and elongation characteristics.
【００１０】また、もう一方の構成繊維であるポリオレ
フィン系芯鞘型複合繊維は、鞘成分の融点が芯成分の融
点より低いポリオレフィン系ポリマーで構成されてお
り、シート状物の形態を固定するためのバインダーとし
ての役割を果たすものである。The other constituent fiber, the polyolefin-based core-sheath type composite fiber, is composed of a polyolefin-based polymer in which the melting point of the sheath component is lower than the melting point of the core component. It plays a role as a binder.
【００１１】上記混合繊維と芯鞘型複合繊維を用いてシ
ート状物を形成する方法としては、例えば、カードでウ
ェブを形成しニードルパンチングで不織布とする方法
や、湿式抄造する方法等、公知の種々の方法を使用する
ことができる。シート状物の厚さは目的に応じて設定さ
れるが一般的には０．０５〜０．３ｍｍに設定される。
シート状物は薄い方が電解液に対して濡れ易い、電池が
小型化できる等の利点があるが、薄すぎると、強度上の
問題が現れる他、短絡し易くなる。また、シート状物が
厚く且つ高密度であると内部まで完全に電解液が浸透す
るのに時間がかかり、スムーズな充放電反応に支障を来
すことになる。As a method for forming a sheet-like article using the above-mentioned mixed fiber and core-sheath type composite fiber, for example, a method of forming a web with a card and forming a nonwoven fabric by needle punching, a method of wet papermaking, and the like are known. Various methods can be used. The thickness of the sheet material is set according to the purpose, but is generally set to 0.05 to 0.3 mm.
The thinner sheet-like material has the advantages that it is easier to wet with the electrolytic solution and the battery can be made smaller, but if it is too thin, problems with strength will appear and short circuits will easily occur. Further, if the sheet-like material is thick and has a high density, it takes time for the electrolytic solution to completely permeate into the interior, which hinders a smooth charge / discharge reaction.
【００１２】親水性はセパレータにとって重要な性能で
ありこれが不充分であると、液中での電気抵抗が高く充
放電サイクル寿命特性が劣る、充放電サイクル後にセパ
レータが電解液で濡れない部分が発生し充分な性能を発
揮しない等の問題が発生する。親水性の中で保液性、遠
心脱水保液性は大変重要な性能であり、特に遠心脱水保
液性が良好であると充放電サイクル寿命が良好であるこ
とが分かっている。Hydrophilicity is an important performance for a separator, and if it is insufficient, electric resistance in the liquid is high and charge / discharge cycle life characteristics are inferior. There is a portion where the separator does not get wet with the electrolyte after the charge / discharge cycle. However, problems such as insufficient performance will occur. It is known that among the hydrophilic properties, the liquid retention property and the centrifugal dehydration liquid retention property are very important performances, and particularly when the centrifugal dehydration liquid retention property is good, it is known that the charge / discharge cycle life is good.
【００１３】本発明のセパレータは親水加工することに
より容易に親水性を付与できる。このときに用いる親水
加工剤は市販の界面活性剤や親水性樹脂等で容易に加工
でき、親水加工剤及び親水加工方法については特に限定
されない。The separator of the present invention can easily be rendered hydrophilic by subjecting it to hydrophilic treatment. The hydrophilic processing agent used at this time can be easily processed with a commercially available surfactant or hydrophilic resin, and the hydrophilic processing agent and the hydrophilic processing method are not particularly limited.
【００１４】本発明のセパレータの繊維構成比率は工程
通過性及び親水性の要求性能の程度により決定される。
工程通過性特に強力に対する要求性能が大きい場合には
ポリオレフィン系芯鞘型複合繊維の割合が多くなる。こ
れは鞘部分がバインダーの機能をするからである。親水
性の中でも保液性（保液率）に対する要求性能が大きい
場合にもポリオレフィン系芯鞘型複合繊維の割合が多く
なる。しかし繊維密度に対する保液率を考えた場合には
ポリオレフィン系芯鞘型複合繊維の割合は少なくなる。
またサイクル特性を重要視する場合にはポリオレフィン
系芯鞘型複合繊維の割合は４０％程度を中心に設定され
る。The fiber composition ratio of the separator of the present invention is determined by the degree of required performance such as process passability and hydrophilicity.
When the processability is particularly high, the proportion of polyolefin-based core-sheath composite fibers is high. This is because the sheath portion functions as a binder. The proportion of the polyolefin-based core-sheath type composite fiber is large even when the required performance for liquid retention (liquid retention) is high among hydrophilic properties. However, when considering the liquid retention ratio with respect to the fiber density, the proportion of the polyolefin-based core-sheath type composite fiber becomes small.
When the cycle characteristics are considered important, the proportion of the polyolefin-based core-sheath type composite fiber is set to be about 40%.
【００１５】[0015]
【実施例】以下、本発明を実施例により具体的に説明す
る。尚、実施例中の試験方法は下記の通りである。EXAMPLES The present invention will be specifically described below with reference to examples. The test methods used in the examples are as follows.
【００１６】［耐アルカリ性］水酸化カリウム３５％水
溶液中でセパレータを１時間常圧煮沸処理した後の重量
減少率（％）。尚試料の秤量は、温度２０±２℃、相対
湿度６５±２％の状態で２４時間静置した後に行った。[Alkali resistance] A weight reduction rate (%) after the separator was boiled under normal pressure for 1 hour in a 35% aqueous potassium hydroxide solution. The sample was weighed after standing for 24 hours at a temperature of 20 ± 2 ° C. and a relative humidity of 65 ± 2%.
【００１７】［耐酸化性］過マンガン酸カリウム５％水
溶液２５０ｍｌと水酸化カリウム３５％水溶液３０ｍｌ
の混合溶液に試料を浸漬して１時間煮沸した後、アルカ
リ分を充分水洗して乾燥し、ついで希シュウ酸に浸漬し
て茶褐色の二酸化マンガンを溶解除去する。この後さら
に充分水洗して乾燥し、試料の重量減少率（％）を求め
た。尚試料の秤量は、上記と同じである。[Oxidation resistance] 250 ml of 5% aqueous solution of potassium permanganate and 30 ml of 35% aqueous solution of potassium hydroxide
After immersing the sample in the mixed solution of 1 above and boiling for 1 hour, the alkali content is thoroughly washed with water and dried, and then immersed in dilute oxalic acid to dissolve and remove the brown manganese dioxide. After this, the sample was further washed with water and dried to determine the weight loss rate (%) of the sample. The weight of the sample is the same as above.
【００１８】［保液率］試料から５×５ｃｍの試験片３
枚を温度２０±２℃、相対湿度６５±２％の状態で２４
時間放置し水分平衡に至らせた状態の重量（Ｗ）を１ｍ
ｇ単位まで測定する。次に試験片を３５％［比重１．３
０（２０℃）］水酸化カリウム水溶液中に試験片を広げ
て浸し、充分吸収（１時間以上）させた後、液中から引
き上げて１０分後の試験片の重量（Ｗ1 ）を測定し、次
の式により算出した。 保液率（％）＝（Ｗ1 −Ｗ）／Ｗ×１００[Liquid retention rate] 5 × 5 cm test piece 3 from the sample
24 sheets at a temperature of 20 ± 2 ℃ and relative humidity of 65 ± 2%
Weight (W) when left to stand for time to reach water equilibrium
Measure to the nearest g. Next, the test piece was 35% [specific gravity 1.3
0 (20 ° C.)] Spread the test piece in an aqueous solution of potassium hydroxide, immerse it, absorb it sufficiently (1 hour or more), pull out from the solution, and measure the weight (W 1 ) of the test piece 10 minutes later. Was calculated by the following formula. Liquid retention rate (%) = (W 1 −W) / W × 100
【００１９】［遠心脱水保液率］試料から５×５ｃｍの
試験片３枚を温度２０±２℃、相対湿度６５±２％の状
態で２４時間放置し水分平衡に至らせた状態の重量
（Ｗ）を１ｍｇまで測定する。 次に試験片を３５％
［比重１．３０（２０℃）］水酸化カリウム水溶液中に
試験片を広げて浸し、充分吸収（１時間以上）させた
後、液中から引き上げて１０分間９０Ｇの遠心力をかけ
た後の試験片の重量（Ｗ1 ）を測定し、次の式により算
出した。 遠心脱水保液率（％）＝（Ｗ1 −Ｗ）／Ｗ×１００[Centrifugal Dehydration Retention Rate] Weight of a sample in which three 5 × 5 cm test pieces were left for 24 hours at a temperature of 20 ± 2 ° C. and a relative humidity of 65 ± 2% to reach water equilibrium ( W) is measured up to 1 mg. Next, the test piece is 35%
[Specific gravity 1.30 (20 ° C)] After spreading the test piece in an aqueous solution of potassium hydroxide, immersing the test piece in it, and sufficiently absorbing it (for 1 hour or more), the test piece was taken out of the solution and subjected to a centrifugal force of 90 G for 10 minutes. The weight (W 1 ) of the test piece was measured and calculated by the following formula. Centrifugal dehydration retention rate (%) = (W 1 −W) / W × 100
【００２０】［引張強度］試料から５×２０ｃｍの試験
片を５枚採取し、ＪＩＳＬ１０９６（織物の引張試験方
法）に準じ、つかみ間隔１０ｃｍ、引張速度１００ｍｍ
／ｍｉｎで１枚ずつ測定し、試験片の切断した時の引張
荷重を読みその平均値で表した。[Tensile Strength] Five 5 × 20 cm test pieces were sampled from the sample, and the gripping interval was 10 cm and the pulling speed was 100 mm in accordance with JISL1096 (tensile test method for woven fabric).
The tensile load when the test piece was cut was read and expressed as the average value.
【００２１】（実施例１）繊度１．５デニール長さ５ｍ
ｍの、芯が融点１６０℃のポリプロピレン、鞘が融点１
２０℃の低融点のポリプロピレンよりなる芯鞘型複合繊
維３０重量％と、ＰＳＦとＰＶＣとポリメチルメタクリ
レート（ＰＭＭＡ）とを２０：３０：５０の重量比で含
む混合重合体よりなる繊度１．０デニール、長さ１０ｍ
ｍの繊維７０重量％とを用いて、目付６０ｇ／ｍ2 、厚
さ０．２ｍｍの湿式不織布を抄造した。(Example 1) Fineness 1.5 denier Length 5 m
m, polypropylene with a melting point of 160 ° C., sheath with a melting point of 1
Fineness 1.0 made of a mixed polymer containing 30% by weight of core-sheath type composite fiber made of polypropylene having a low melting point of 20 ° C., PSF, PVC and polymethylmethacrylate (PMMA) in a weight ratio of 20:30:50. Denier, length 10m
Using 70% by weight of m fiber, a wet type nonwoven fabric having a basis weight of 60 g / m 2 and a thickness of 0.2 mm was produced.
【００２２】ついでこの不織布を中級アルコール硫酸エ
ステルソーダ系の界面活性剤（明成化学工業（株）製マ
ーセリンＨＳＯ）の０．７％水溶液に浸漬し、圧搾ロー
ルで含液率１５０％に絞った後、シリンダー乾燥機で乾
燥してシート状物を形成した。得られたシート状物中に
付着された界面活性剤の量はシート状物に対して１．０
重量％であった。得られたセパレータについて、引張強
度、保液率、及び遠心脱水保液率を調べた結果を表１に
示した。Next, this non-woven fabric was dipped in a 0.7% aqueous solution of a medium alcohol sulfate ester soda surfactant (Merceline HSO manufactured by Meisei Chemical Industry Co., Ltd.) and squeezed to a liquid content of 150% with a pressing roll. Then, it was dried with a cylinder dryer to form a sheet. The amount of the surfactant attached in the obtained sheet material was 1.0 with respect to the sheet material.
% By weight. Table 1 shows the results of examining the tensile strength, the liquid retention ratio, and the centrifugal dehydration liquid retention ratio of the obtained separator.
【００２３】（実施例２〜５）実施例１で用いたのと同
様の芯鞘型複合繊維と混合重合体繊維を用いて、芯鞘型
複合繊維及び混合重合体繊維の構成比率を種々変更し、
それぞれ目付６０ｇ／ｍ2 、厚さ０．２ｍｍの湿式不織
布を抄造した。ついでこれらの不織布に実施例１と同様
の処理を行い、得られたセパレータについて、引張強
度、保液率、遠心脱水保液率を調べ、その結果を表１に
示した。(Examples 2 to 5) Using the same core-sheath type composite fiber and mixed polymer fiber used in Example 1, the composition ratio of the core-sheath type composite fiber and the mixed polymer fiber was changed variously. Then
A wet nonwoven fabric having a basis weight of 60 g / m 2 and a thickness of 0.2 mm was formed into a paper. Then, these nonwoven fabrics were treated in the same manner as in Example 1, and the separator thus obtained was examined for tensile strength, liquid retention and centrifugal dehydration liquid retention, and the results are shown in Table 1.
【００２４】[0024]
【表１】 [Table 1]
【００２５】[0025]
【発明の効果】上述の如く構成された本発明の電池用セ
パレータは、工程通過性、保液性、遠心脱水保液性に優
れたものであって、その工業的価値は極めて高いもので
ある。The battery separator of the present invention constructed as described above is excellent in process passability, liquid retention and centrifugal dehydration liquid retention, and its industrial value is extremely high. .
Claims (1)
スルフォン１５〜４０重量％、ポリ塩化ビニル２０〜４
０重量％及びメタクリル酸エステル系重合体２０〜６５
重量％との混合重合体よりなる繊維９０〜２０重量％
と、芯成分が鞘成分より融点の低いポリオレフィン系芯
鞘型複合繊維１０〜８０重量％から成るシート状物に、
親水加工を施したことを特徴とする電池用セパレータ。1. Polysulfone and / or polyethersulfone 15 to 40% by weight, polyvinyl chloride 20 to 4
0% by weight and methacrylic acid ester-based polymer 20-65
90% to 20% by weight of fibers made of a mixed polymer with% by weight
And a sheet-shaped article comprising a core-sheath type composite fiber having a core component having a lower melting point than that of the sheath component in an amount of 10 to 80% by weight,
A battery separator characterized by being subjected to hydrophilic treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5147961A JPH076746A (en) | 1993-06-18 | 1993-06-18 | Battery separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5147961A JPH076746A (en) | 1993-06-18 | 1993-06-18 | Battery separator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH076746A true JPH076746A (en) | 1995-01-10 |
Family
ID=15442005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5147961A Pending JPH076746A (en) | 1993-06-18 | 1993-06-18 | Battery separator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH076746A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6444367B1 (en) | 1999-01-08 | 2002-09-03 | Ahlstrom Mount Holly Springs, Llc | Durable hydrophilic nonwoven mat for rechargable alkaline batteries |
| US7572638B2 (en) | 2001-10-19 | 2009-08-11 | Hologic, Inc. | Automated system and method for processing multiple liquid-based specimens |
| US8216528B2 (en) | 2005-09-29 | 2012-07-10 | Sysmex Corporation | Sample preparation kit, sample preparation container, and sample processing device |
| WO2013082342A3 (en) * | 2011-11-30 | 2013-07-18 | Corning Incorporated | Apparatus and method for carbon activation using multi-chamber periodic furnace |
| US9687842B2 (en) | 2012-01-20 | 2017-06-27 | Yamaha Hatsudoki Kabushiki Kaisha | Subject selection device and subject selection method |
-
1993
- 1993-06-18 JP JP5147961A patent/JPH076746A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6444367B1 (en) | 1999-01-08 | 2002-09-03 | Ahlstrom Mount Holly Springs, Llc | Durable hydrophilic nonwoven mat for rechargable alkaline batteries |
| US7329623B2 (en) | 1999-01-08 | 2008-02-12 | Ahlstrom Mount Holly Springs Llc | Durable hydrophilic nonwoven mat |
| US7572638B2 (en) | 2001-10-19 | 2009-08-11 | Hologic, Inc. | Automated system and method for processing multiple liquid-based specimens |
| US8216528B2 (en) | 2005-09-29 | 2012-07-10 | Sysmex Corporation | Sample preparation kit, sample preparation container, and sample processing device |
| WO2013082342A3 (en) * | 2011-11-30 | 2013-07-18 | Corning Incorporated | Apparatus and method for carbon activation using multi-chamber periodic furnace |
| US9687842B2 (en) | 2012-01-20 | 2017-06-27 | Yamaha Hatsudoki Kabushiki Kaisha | Subject selection device and subject selection method |
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