JPH06176750A - Manufacture of base material sheet battery separator - Google Patents
Manufacture of base material sheet battery separatorInfo
- Publication number
- JPH06176750A JPH06176750A JP43A JP35221092A JPH06176750A JP H06176750 A JPH06176750 A JP H06176750A JP 43 A JP43 A JP 43A JP 35221092 A JP35221092 A JP 35221092A JP H06176750 A JPH06176750 A JP H06176750A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- fiber
- battery separator
- sintered
- plasma
- 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
Landscapes
- Cell Separators (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、各種の一次電池および
二次電池に用いられるセパレータ（隔離板）用の基材シ
ートの製造方法に関し、特に、ポリテトラフルオロエチ
レン繊維を素材とした電解液含浸性が良好で電池組立が
容易である電池セパレータ用基材シートの製造方法に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a base sheet for a separator (separator) used in various primary batteries and secondary batteries, and particularly to an electrolytic solution containing polytetrafluoroethylene fiber as a raw material. The present invention relates to a method for producing a base sheet for a battery separator, which has a good impregnation property and facilitates battery assembly.
【０００２】[0002]
【従来技術】通常、電池は正極、セパレータ、負極が一
体化された形で構成されており、セパレータは、本来正
極と負極が短絡しないために用いられていた。2. Description of the Related Art Normally, a battery is constructed by integrating a positive electrode, a separator and a negative electrode, and the separator was originally used because the positive electrode and the negative electrode do not short-circuit.
【０００３】最近では、電池の小型化軽量化や長寿命化
のために、セパレータには、短絡防止に必要な十分な電
気絶縁性を有すること、耐電解液性、および耐酸化性を
有すること、良好な電解液保持に必要な適当な空隙孔径
を有すること、製造工程において要求特性に応じて厚さ
が任意に変えられること、有害物質が電解液等にしみで
ないこと、セパレータに金属が析出しないこと等が要求
されている。Recently, in order to reduce the size and weight of the battery and to extend the life of the battery, the separator has to have sufficient electric insulation required for short circuit prevention, electrolytic solution resistance, and oxidation resistance. , Having an appropriate pore diameter necessary for good electrolyte retention, the thickness can be arbitrarily changed according to the required characteristics in the manufacturing process, no harmful substances are spotted in the electrolyte, etc., metal is deposited on the separator There is a demand for things not to do.
【０００４】従来、紙やガラスクロスからなる基材シー
トを電池セパレータとして使用していたが、上述の諸要
求特性を同時に満足するものではなかった。Conventionally, a base material sheet made of paper or glass cloth has been used as a battery separator, but it has not simultaneously satisfied the various required characteristics.
【０００５】一方、上記諸要求特性を満たすものとして
最近ポリテトラフルオロエチレン繊維、および該繊維と
無機繊維、例えばガラス繊維との混合織布を基材シ−ト
とし、これを電池セパレータとして用いることが提案さ
れていた。On the other hand, recently, polytetrafluoroethylene fiber and a woven fabric of a mixture of the fiber and an inorganic fiber such as glass fiber are used as a base sheet for satisfying the above-mentioned required characteristics, and this is used as a battery separator. Was proposed.
【０００６】しかしながら、ポリテトラフルオロエチレ
ン繊維を電池セパレータ用基材シートとして使用した場
合、該基材シートに対する電解液の含浸性が不良であ
り、そのために、該基材シートに電解液が含浸するのに
時間がかかり、従って、電池製造の際に生産効率が著し
く悪くなるという欠点を有していた。However, when the polytetrafluoroethylene fiber is used as a base sheet for a battery separator, the impregnating property of the electrolytic solution into the base sheet is poor, and therefore the base sheet is impregnated with the electrolytic solution. However, it has a drawback that the production efficiency is significantly deteriorated during the production of the battery.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、ポリテトラ
フルオロエチレン繊維を使用し、従来技術では不可能で
あった電解液に対する優れた含浸性を示す電池セパレー
タ用基材シートの製造方法を提案することを目的とす
る。DISCLOSURE OF THE INVENTION The present invention proposes a method for producing a base sheet for a battery separator, which uses polytetrafluoroethylene fiber and exhibits an excellent impregnation property with respect to an electrolytic solution, which was impossible in the prior art. The purpose is to do.
【０００８】[0008]
【課題を解決するための手段】本発明の第一の製造方法
は、（Ａ）ポリテトラフルオロエチレン繊維のスラリー
を湿式抄紙法によりシート化する工程と、（Ｂ）該ポリ
テトラフルオロエチレン繊維のシ−トを焼結処理して焼
結シートを得る工程と、（Ｃ）該焼結シートの表面をプ
ラズマ処理する工程、とよりなることを特徴とする電池
セパレータ用基材シ−トの製造方法に関する。The first production method of the present invention comprises: (A) a step of forming a slurry of polytetrafluoroethylene fibers into a sheet by a wet papermaking method, and (B) a step of producing the polytetrafluoroethylene fibers. Manufacture of a base sheet for a battery separator, which comprises a step of sintering a sheet to obtain a sintered sheet, and (C) a step of plasma-treating the surface of the sintered sheet. Regarding the method.
【０００９】また、本発明の第二の製造方法は、（Ａ）
ポリテトラフルオロエチレン繊維と無機繊維の混抄スラ
リーを湿式抄紙法によりシート化することにより混抄シ
ートを得る工程と、（Ｂ）該混抄シートを焼結処理して
焼結シートを得る工程と、（Ｃ）該焼結シートの表面を
プラズマ処理する工程、とよりなることを特徴とする電
池セパレータ用基材シ−トの製造方法に関する。The second manufacturing method of the present invention is (A)
A step of obtaining a mixed paper sheet by forming a mixed paper slurry of polytetrafluoroethylene fiber and an inorganic fiber into a sheet by a wet papermaking method; (B) a step of sintering the mixed paper sheet to obtain a sintered sheet; ) A step of subjecting the surface of the sintered sheet to plasma treatment, and a method for producing a base sheet for a battery separator.
【００１０】以下に、本発明の電池セパレータ用基材シ
−トの第一の製造方法の一例について詳述する。An example of the first method of manufacturing the battery separator base sheet of the present invention will be described in detail below.
【００１１】まず、ポリテトラフルオロエチレン（以
下、ＰＴＦＥと称す）の繊維シートを作製する。本発明
のＰＴＦＥ繊維とは、延伸または未延伸のＰＴＦＥのデ
ィスパ−ジョンにビスコ−ス、カルボキシメチルセルロ
−ス、ポリビニルアルコ−ル等の結着剤をマトリックス
として構成せしめ、細孔より凝固浴に紡出して得たもの
である。延伸または未延伸のＰＴＦＥ繊維を３〜１５ｍ
ｍの長さにカットし、これをポリアクリルアミド等の分
散剤とともに水に分散してスラリーとし、該スラリーを
円網抄紙機、長網抄紙機等の公知の抄紙機で抄紙し、Ｐ
ＴＦＥの繊維シ−トを作成する。First, a fiber sheet of polytetrafluoroethylene (hereinafter referred to as PTFE) is prepared. The PTFE fiber of the present invention is a dispersion of stretched or unstretched PTFE which is constituted by a binder such as viscose, carboxymethylcellulose, polyvinyl alcohol, etc. as a matrix, and the pores form a coagulation bath. It was obtained by spinning. Stretched or unstretched PTFE fiber 3 to 15 m
It is cut to a length of m and is dispersed in water together with a dispersant such as polyacrylamide to form a slurry. The slurry is made into paper by a known paper machine such as a cylinder paper machine or a Fourdrinier paper machine, and P
Create a TFE fiber sheet.
【００１２】ＰＴＦＥのシート化に際しては、ＰＴＦＥ
繊維に配合されているマトリックス物質が、抄紙の際の
繊維間の結着機能を発揮し、ＰＴＦＥ繊維のシ−ト化を
可能ならしめる。When forming a PTFE sheet, the PTFE
The matrix substance mixed in the fibers exerts a binding function between the fibers during paper making, and makes it possible to form the PTFE fibers into a sheet.
【００１３】次に、該シ−トをＰＴＦＥの融点以上の温
度（例えば３８０℃）にて焼結処理し、ＰＴＦＥ繊維間
を融着せしめ、焼結シートを作製する。さらに、必要に
応じてＰＴＦＥ繊維間に混在するビスコ−スなどのマト
リックスを熱分解除去せしめるために該焼結シートを３
００〜３３０℃程度に加熱処理してもよい。Next, the sheet is sintered at a temperature above the melting point of PTFE (for example, 380 ° C.) to fuse the PTFE fibers to each other to produce a sintered sheet. Further, if necessary, the sintered sheet is mixed with 3 in order to thermally decompose and remove the matrix such as viscose mixed between the PTFE fibers.
You may heat-process at about 00-330 degreeC.
【００１４】しかるのち、該焼結シ−トを下記の要領に
てプラズマ処理することにより、該焼結シートの表面改
質を行ない、本発明の製造方法を実施できる。Then, the surface of the sintered sheet is modified by subjecting the sintered sheet to plasma treatment in the following manner, and the production method of the present invention can be carried out.
【００１５】本発明でいうプラズマ処理とは、例えば、
図１のような平行板電極型プラズマ装置を用いて行うこ
とができる。すなわち、図１のベルジャー１内は密閉さ
れた空間であり、プラズマ処理時に減圧されて一定圧力
に保たれ、互いに平行に配置された２つの電極板２の下
部電極板上に上述のＰＴＦＥの繊維焼結シート３を載置
し、高周波電源４によって電極間に電圧をかけてプラズ
マ雰囲気を作り出し、該プラズマ雰囲気下にガス供給路
５よりガスをプラズマ雰囲気中に供給して、該焼結シー
トの表面を表面処理するものである。なお、６は上部電
極板を支えるための電極支柱であり、７はベルジャー内
のガスを排気するための排気口である。The plasma treatment in the present invention is, for example,
This can be performed using a parallel plate electrode type plasma device as shown in FIG. That is, the inside of the bell jar 1 of FIG. 1 is a sealed space, which is depressurized during plasma processing and kept at a constant pressure, and the above-mentioned PTFE fiber is placed on the lower electrode plates of two electrode plates 2 arranged in parallel with each other. The sintered sheet 3 is placed, a voltage is applied between the electrodes by the high frequency power source 4 to create a plasma atmosphere, and a gas is supplied into the plasma atmosphere from the gas supply path 5 under the plasma atmosphere to generate a plasma atmosphere. The surface is surface-treated. In addition, 6 is an electrode support for supporting the upper electrode plate, and 7 is an exhaust port for exhausting gas in the bell jar.
【００１６】本発明において使用できるプラズマ処理用
ガスは、酸素ガス、窒素ガス、水素ガス、乾燥空気、ア
ルゴンガス、ヘリウムガス、アンモニアガスの中から選
ばれる少なくとも一種である。The plasma processing gas usable in the present invention is at least one selected from oxygen gas, nitrogen gas, hydrogen gas, dry air, argon gas, helium gas and ammonia gas.
【００１７】本発明においては、高周波（１３．５６Ｍ
Ｈｚ）電源の出力は、０．１Ｗ／ｃｍ2〜２０Ｗ／ｃｍ2
の範囲内、特に好ましくは０．１〜２．０Ｗ／ｃｍ2の
範囲内で設定されることが好ましい。２０Ｗ／ｃｍ2以
上であるとプラズマ処理の出力が強すぎてＰＴＦＥの焼
結シートが劣化し、また、０．１Ｗ／ｃｍ2以下である
場合、プラズマが発生しないので好ましくない。In the present invention, a high frequency (13.56M
Hz) The output of the power source is 0.1 W / cm 2 to 20 W / cm 2
The range of 0.1 to 2.0 W / cm 2 is particularly preferable. When it is 20 W / cm 2 or more, the output of the plasma treatment is too strong and the sintered PTFE sheet is deteriorated, and when it is 0.1 W / cm 2 or less, plasma is not generated, which is not preferable.
【００１８】また、本発明においては、プラズマ処理圧
力は、０．０１Ｔｏｒｒ〜１０Ｔｏｒｒの範囲内、特に
好ましくは０．０５〜２Ｔｏｒｒの範囲内に設定される
ことが好ましい。０．０１Ｔｏｒｒ以下でプラズマ処理
するとプラズマ処理効果が薄く、また、１０Ｔｏｒｒ以
上でプラズマ処理するとプラズマが発生しないので好ま
しくない。Further, in the present invention, the plasma processing pressure is preferably set within a range of 0.01 Torr to 10 Torr, particularly preferably within a range of 0.05 to 2 Torr. When the plasma treatment is performed at 0.01 Torr or less, the plasma treatment effect is weak, and when the plasma treatment is performed at 10 Torr or more, plasma is not generated, which is not preferable.
【００１９】さらにまた、本発明においては、プラズマ
処理時間は、０．５秒〜１０分の範囲内、特に好ましく
は１０秒〜５分の範囲内に設定されることが好ましい。
０．５秒以下でプラズマ処理すると処理効果が薄く、ま
た、１０分以上でプラズマ処理するとＰＴＦＥの焼結シ
ートが劣化するので好ましくない。Furthermore, in the present invention, the plasma treatment time is preferably set within the range of 0.5 seconds to 10 minutes, particularly preferably within the range of 10 seconds to 5 minutes.
If the plasma treatment is performed for 0.5 seconds or less, the treatment effect is weak, and if the plasma treatment is performed for 10 minutes or more, the PTFE sintered sheet is deteriorated, which is not preferable.
【００２０】本願発明の第二の製造方法は、前記第一の
製造方法のＰＴＦＥ繊維のスラリーを作製する構成で、
該スラリー中に、ガラスファイバ−、シリカファイバ
−、アルミナファイバー、アルミニウムシリケ−ト等の
無機繊維を混抄して、混抄シートを作製すること以外
は、全て第一の製造方法に準ずるものである。A second manufacturing method of the present invention is a structure for preparing a slurry of PTFE fiber of the first manufacturing method,
In the slurry, all are in accordance with the first production method, except that glass fiber, silica fiber, alumina fiber, and inorganic fibers such as aluminum silicate are mixed to prepare a mixed sheet. .
【００２１】該無機繊維のＰＴＦＥ繊維に対する配合比
をコントロ−ルすることにより、ＰＴＦＥの持つ広い温
度域での絶縁特性が安定し、また、剛性の改善、電解液
保持能力、ガス浸透能、短絡防止能、充電時にガスが電
池内部に蓄積しない等の特性を有する基材シ−トを得る
ことができる。By controlling the compounding ratio of the inorganic fiber to the PTFE fiber, the insulating property of PTFE in a wide temperature range is stabilized, and the rigidity is improved, the electrolyte retaining ability, the gas permeating ability, and the short circuit are obtained. It is possible to obtain a base sheet having properties such as preventing ability and gas not accumulating inside the battery during charging.
【００２２】本発明の電池セパレータ用基材シートは、
使用する電池の寸法に応じて所定寸法に裁断加工し、電
解液を含浸して電池内に組み込み、電池セパレータとし
て使用する。また、必要に応じてセパレータは複数枚積
層させて使用する。The base sheet for battery separator of the present invention is
It is cut into a predetermined size according to the size of the battery to be used, impregnated with an electrolytic solution, incorporated into the battery, and used as a battery separator. If necessary, a plurality of separators may be laminated and used.
【００２３】上述の本発明の製造方法によって得られた
基材シ−トは、例えば、ニッケル−亜鉛電池、鉛蓄電
池、ニッケル−カドニウム蓄電池等において、セパレー
タを正極物質と負極物質との間に介在させるといった通
常の電池セパレータと同様にして使用される。The substrate sheet obtained by the above-described manufacturing method of the present invention is, for example, a nickel-zinc battery, a lead storage battery, a nickel-cadmium storage battery, or the like, and a separator is interposed between the positive electrode material and the negative electrode material. It is used in the same manner as an ordinary battery separator.
【００２４】[0024]
【実施例】以下、実施例及び比較例をもって本発明を更
に詳細に説明する。EXAMPLES The present invention will be described in more detail with reference to Examples and Comparative Examples.
【００２５】実施例１ ビスコ−スをマトリックスとしてＰＴＦＥディスパ−ジ
ョンより得た未延伸ＰＴＦＥ繊維（昭和工業社製 トヨ
フロン 繊維径１５μｍφ）を６ｍｍ長にカットし、
０．５％濃度で水中に分散し、ポリアクリルアミド系の
合成分散剤を加えてスラリーを作製し、円網抄紙機によ
りシ−ト化し、坪量７０ｇ／ｍ2 のＰＴＦＥの繊維シ−
トを得た。Example 1 Unstretched PTFE fibers (TOYOFLON fiber diameter 15 μmφ manufactured by Showa Kogyo Co., Ltd.) obtained from PTFE dispersion using bismuth as a matrix were cut to a length of 6 mm,
Dispersed in water at a concentration of 0.5%, added a polyacrylamide-based synthetic dispersant to prepare a slurry, formed into a sheet by a cylinder paper machine, and made a PTFE fiber sheet having a basis weight of 70 g / m 2.
Got
【００２６】該シ−トを赤外線ヒ−タ−を用いて３８０
℃で３分間加熱し、繊維中のＰＴＦＥの粒子を融着して
連続化するとともに交絡繊維間融着を行った。さらに、
該シ−ト中のビスコ−スを熱分解除去するために３２０
℃で２０時間加熱処理し、重さが８３ｇ／ｍ2 の白色状
のＰＴＦＥの繊維焼結シ−トを得た。The sheet was heated to 380 by using an infrared heater.
The mixture was heated at 0 ° C. for 3 minutes to fuse the particles of PTFE in the fibers to make them continuous, and at the same time, the inter-entangled fibers were fused. further,
To remove the viscose in the sheet by pyrolysis, 320
A heat treatment was carried out at 20 ° C. for 20 hours to obtain a white PTFE fiber sintered sheet having a weight of 83 g / m 2 .
【００２７】しかるのち、前記ＰＴＦＥ繊維の焼結シー
トに対して前記図１に示した装置を使用し、酸素ガスを
用いてプラズマ処理することにより本発明による基材シ
−トを得た。その際のプラズマ処理条件は１３．５６Ｍ
Ｈｚの高周波電源の出力が１．５Ｗ／ｃｍ2 、プラズマ
処理圧力が０．１Ｔｏｒｒ、プラズマ処理時間が１０秒
であった。Thereafter, the sintered sheet of PTFE fiber was subjected to plasma treatment using oxygen gas using the apparatus shown in FIG. 1 to obtain a base sheet according to the present invention. The plasma processing condition at that time is 13.56M
The output of the high frequency power supply of 1.5 Hz was 1.5 W / cm 2 , the plasma processing pressure was 0.1 Torr, and the plasma processing time was 10 seconds.
【００２８】実施例２ 実施例１と同様にしてＰＴＦＥの繊維焼結シ−トを作製
し、アルゴンガスを用いてプラズマ処理して本発明によ
る基材シ−トを得た。プラズマ条件は、高周波電源（１
３．５６ＭＨｚ）の出力が１．０Ｗ／ｃｍ2、プラズマ
処理圧力が０．２Ｔｏｒｒ、プラズマ処理時間は２０秒
であった。Example 2 A PTFE fiber-sintered sheet was prepared in the same manner as in Example 1 and plasma-treated with argon gas to obtain a base sheet according to the present invention. Plasma condition is high frequency power supply (1
The output of 3.56 MHz) was 1.0 W / cm 2 , the plasma processing pressure was 0.2 Torr, and the plasma processing time was 20 seconds.
【００２９】比較例１ 実施例１と同様にしてＰＴＦＥの繊維焼結シ−トを作製
し、プラズマ処理を行うことなく比較用の基材シ−トを
得た。Comparative Example 1 A PTFE fiber-sintered sheet was produced in the same manner as in Example 1 to obtain a base material sheet for comparison without performing plasma treatment.
【００３０】実施例１〜２、および比較例１のそれぞれ
の製造方法で作製された基材シ−トを２５×１５０ｍｍ
の寸法に加工して、電池用電解液として３０％ＫＯＨ水
溶液、および３０％硫酸水溶液に含浸させ、その含浸状
態を観察して評価した。A substrate sheet manufactured by each of the manufacturing methods of Examples 1 and 2 and Comparative Example 1 was prepared as 25 × 150 mm.
Was processed into a size of, and impregnated with a 30% KOH aqueous solution and a 30% sulfuric acid aqueous solution as a battery electrolyte, and the impregnated state was observed and evaluated.
【００３１】その結果、実施例１〜２、特に実施例１の
基材シ−トは、上述の電池用電解液に対して基材シート
の表面に気泡が生じないことから、それぞれ良好な含浸
状態を示していることがわかった。As a result, the base sheet of each of Examples 1 and 2, and particularly Example 1, did not generate air bubbles on the surface of the base sheet with respect to the above-mentioned electrolyte solution for batteries, and thus each of the sheets had good impregnation. It turned out to indicate the condition.
【００３２】一方、比較例によって得られた基材シ−ト
を上述の電池用電解液に浸すと、比較例によって得られ
た基材シートの表面は、該電池用電解液をはじき、ま
た、含浸したとしてもその含浸速度は遅く、さらにまた
表面に気泡を生じることから基材シートの多孔質部に均
一に電池用電解液が含浸していないことがわかった。On the other hand, when the base sheet obtained in Comparative Example is dipped in the above-mentioned battery electrolyte, the surface of the base sheet obtained in Comparative Example repels the battery electrolyte, and Even when impregnated, the impregnation rate was slow, and bubbles were generated on the surface, which revealed that the porous portion of the base sheet was not uniformly impregnated with the battery electrolyte.
【００３３】[0033]
【発明の効果】本発明の製造方法により得られた電池セ
パレータ用基材シ−トは、電池セパレータ用基材シート
に必要な良好な電気絶縁性、耐電解液性、耐酸化性、電
解液保持性等を維持しながら、電解液に対して良好な含
浸性を示すため、電池組み立ての効率が向上するという
優れた作用効果を有するものであった。The substrate sheet for a battery separator obtained by the production method of the present invention has good electrical insulation, electrolytic solution resistance, oxidation resistance and electrolytic solution required for a battery separator substrate sheet. Since it has a good impregnation property with respect to the electrolytic solution while maintaining the holding property and the like, it has an excellent effect of improving the efficiency of battery assembly.
【図１】プラズマ処理装置の一例FIG. 1 is an example of a plasma processing apparatus.
１ ベルジャー ２ 電極板 ３ ＰＴＦＥの繊維焼結シート ４ 高周波電源 ５ ガス供給路 ６ 電極支柱 ７ 排気口 1 bell jar 2 electrode plate 3 PTFE fiber sintering sheet 4 high frequency power supply 5 gas supply path 6 electrode support 7 exhaust port
Claims (2)
スラリーを湿式抄紙法によりシート化する工程と、
（Ｂ）該ポリテトラフルオロエチレン繊維のシ−トを焼
結処理して焼結シートを得る工程と、（Ｃ）該焼結シー
トの表面をプラズマ処理する工程、とよりなることを特
徴とする電池セパレータ用基材シ−トの製造方法。1. A step of forming a slurry of (A) polytetrafluoroethylene fiber into a sheet by a wet papermaking method,
(B) a step of sintering the sheet of the polytetrafluoroethylene fiber to obtain a sintered sheet, and (C) a step of plasma-treating the surface of the sintered sheet. A method for producing a base sheet for a battery separator.
無機繊維の混抄スラリーを湿式抄紙法によりシート化す
ることにより混抄シートを得る工程と、（Ｂ）該混抄シ
ートを焼結処理して焼結シートを得る工程と、（Ｃ）該
焼結シートの表面をプラズマ処理する工程、とよりなる
ことを特徴とする電池セパレータ用基材シ−トの製造方
法。2. A step of (A) obtaining a mixed paper sheet by forming a mixed paper slurry of polytetrafluoroethylene fiber and an inorganic fiber into a sheet by a wet papermaking method, and (B) sintering the mixed paper sheet for sintering. A method for producing a base sheet for a battery separator, comprising the steps of obtaining a sheet and (C) plasma-treating the surface of the sintered sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP43A JPH06176750A (en) | 1992-12-10 | 1992-12-10 | Manufacture of base material sheet battery separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP43A JPH06176750A (en) | 1992-12-10 | 1992-12-10 | Manufacture of base material sheet battery separator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06176750A true JPH06176750A (en) | 1994-06-24 |
Family
ID=18422516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP43A Pending JPH06176750A (en) | 1992-12-10 | 1992-12-10 | Manufacture of base material sheet battery separator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06176750A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003054299A1 (en) * | 2001-12-13 | 2003-07-03 | Daikin Industries, Ltd. | Method for producing polytetrafluoroethylene paper and polytetrafluoroethylene paper |
| US7311994B2 (en) | 2002-09-17 | 2007-12-25 | Tomoegawa Paper Co., Ltd. | Separator for lithium ion secondary battery and lithium ion secondary battery provided therewith |
| WO2008094698A1 (en) * | 2007-01-31 | 2008-08-07 | Robert Roberts | Methods for continuous processing polytetrafluoroethylene (ptfe) resin |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52114710A (en) * | 1976-03-23 | 1977-09-26 | Daikin Ind Ltd | Process for making paper mixed with polytetrafluoroethylene |
| JPH02192655A (en) * | 1989-01-20 | 1990-07-30 | Mitsubishi Gas Chem Co Inc | Secondary battery |
-
1992
- 1992-12-10 JP JP43A patent/JPH06176750A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52114710A (en) * | 1976-03-23 | 1977-09-26 | Daikin Ind Ltd | Process for making paper mixed with polytetrafluoroethylene |
| JPH02192655A (en) * | 1989-01-20 | 1990-07-30 | Mitsubishi Gas Chem Co Inc | Secondary battery |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003054299A1 (en) * | 2001-12-13 | 2003-07-03 | Daikin Industries, Ltd. | Method for producing polytetrafluoroethylene paper and polytetrafluoroethylene paper |
| CN1294325C (en) * | 2001-12-13 | 2007-01-10 | 大金工业株式会社 | Method for producing polytetrafluoroethylene paper and polytetrafluoroethylene paper |
| US7311994B2 (en) | 2002-09-17 | 2007-12-25 | Tomoegawa Paper Co., Ltd. | Separator for lithium ion secondary battery and lithium ion secondary battery provided therewith |
| US7744792B2 (en) | 2003-03-27 | 2010-06-29 | Robert Roberts | Methods for continuous processing polytetrafluoroethylene (PTFE) resin |
| WO2008094698A1 (en) * | 2007-01-31 | 2008-08-07 | Robert Roberts | Methods for continuous processing polytetrafluoroethylene (ptfe) resin |
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