JPH0355938B2 - - Google Patents
Info
- Publication number
- JPH0355938B2 JPH0355938B2 JP57211727A JP21172782A JPH0355938B2 JP H0355938 B2 JPH0355938 B2 JP H0355938B2 JP 57211727 A JP57211727 A JP 57211727A JP 21172782 A JP21172782 A JP 21172782A JP H0355938 B2 JPH0355938 B2 JP H0355938B2
- Authority
- JP
- Japan
- Prior art keywords
- fibers
- separator
- polypropylene
- fiber
- polyethylene
- 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.)
- Expired - Lifetime
Links
- 239000000835 fiber Substances 0.000 claims description 66
- 239000002131 composite material Substances 0.000 claims description 25
- -1 polypropylene Polymers 0.000 claims description 21
- 239000004743 Polypropylene Substances 0.000 claims description 16
- 229920001155 polypropylene Polymers 0.000 claims description 16
- 239000004698 Polyethylene Substances 0.000 claims description 15
- 229920000573 polyethylene Polymers 0.000 claims description 15
- 229920005989 resin Polymers 0.000 claims description 10
- 239000011347 resin Substances 0.000 claims description 10
- 239000004745 nonwoven fabric Substances 0.000 claims description 9
- 229920006122 polyamide resin Polymers 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000004952 Polyamide Substances 0.000 description 16
- 229920002647 polyamide Polymers 0.000 description 16
- 238000010521 absorption reaction Methods 0.000 description 10
- 239000003792 electrolyte Substances 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 229920013716 polyethylene resin Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 239000004840 adhesive resin Substances 0.000 description 1
- 229920006223 adhesive resin Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002074 melt spinning Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/44—Fibrous material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0002—Aqueous electrolytes
- H01M2300/0014—Alkaline electrolytes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
- H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
- H01M50/423—Polyamide resins
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Cell Separators (AREA)
Description
本発明は、密閉型アルカリ電池、特にニツケル
カドミウム蓄電池に用いるアルカリ電池用セパレ
ーターの構成に関するものである。
従来、アルカリ電池用セパレーターにはポリア
ミド繊維の持つ吸水性、吸液性等の特性を利用し
たポリアミド繊維よりなる不織布が一般に用いら
れている。また、ポリアミド繊維の吸液性、吸水
性をより向上させる為に無機塩類により繊維を溶
出してポーラスな構造にしたものがみられる。
このように繊維を多孔性としたことにより、電
解液の保液量は均一となり、それがため放電容量
が大きくなるという特徴がある。
然るに、アルカリ電池は高温時或は連続的に過
充電が行なわれる様な条件下では、電解液の温度
上昇や電気化学変化が大きい為に、上記ポリアミ
ド製不織布セパレーターではポリアミド繊維が電
解液のKOH溶液により分解され、強度低下が著
しく、長期の使用に耐え難いという欠点がある。
また、ポリアミド繊維に電解液に対し耐性のあ
るポリプロピレン繊維を混入した不織布よりなる
セパレーターも見られるが、ポリプロピレン繊維
の熱溶着により繊維間相互を接着するため、加熱
溶着時にポリプロピレン繊維の収縮が著しく、厳
密な工程管理を必要とし、均一な製品を大量、か
つ安価に製造することが困難であるという問題点
がある。
更に、ポリプロピレン樹脂のメルトブロー方式
による不織布、ポリプロピレン繊維の湿式法によ
る不織布をセパレーターとしたものがあるが、吸
液性、耐アルカリ性等の電池特性は満足しうるも
のの、製法上の欠点であるセパレーターの機械的
強度が弱い為、電池製造工程においてセパレータ
ーの伸び、切断等の問題が発生することによりラ
インアツプされていないのが現状である。
更に、ポリアミド繊維とポリプロピレン−ポリ
エチレン系複合繊維との混合ウエブを加熱・加圧
してポリエチレン成分を溶融し、繊維間相互を一
体に結合したセパレーターも工夫されてはいる。
しかし、上記ポリプロピレン−ポリエチレン系
複合繊維の混合割合が非常に限定されるという問
題点がある。即ち、上記複合繊維が20％以下では
接着力不足となり、電池組立工程にかけられず、
また、組立工程に必要な引張強度値（１Kg／cm以
上）を付与するために複合繊維を20〜50％混合す
ると、ポリアミド繊維が50％以上含まれることに
なり、電解液によるポリアミド繊維の分解、脆弱
化に伴う短絡現象発生の問題で好ましくなく、
又、上記複合繊維を50％以上混入させると加熱・
加圧時に溶融した複合繊維の低融点樹脂成分が加
圧により圧延されて通気性が著しく低下し、セパ
レーターとしての性能に悪影響を及ぼす。この様
にポリプロピレン−ポリエチレン系複合繊維との
混入割合が非常に限定される上に、ポリアミド繊
維が存在するため、劣化による形態変化が著し
く、大巾な性能低下をきたすことになる。
本発明は上記諸欠点を克服し、如何なる条件下
でも十分実用に供し得るアルカリ電池用セパレー
ターを提供するものである。
以下本発明の一実施例を詳細に説明する。
本発明のアルカリ電池用セパレーターは、第１
図に示す様にポリプロピレン樹脂95〜70％（重量
比）と、ポリアミド樹脂５〜30％（重量比）とを
混合し、溶融紡糸によりポリプロピレン樹脂成分
２を海とし、ポリアミド樹脂成分３が島状に点在
して形成される海島型の複合繊維１50〜70％（重
量比）と、第２図に示す様にポリプロピレン−ポ
リエチレン系サイドバイサイド型の複合繊維６50
〜30％（重量比）との混合繊維を用いる。
例えばポリプロピレン樹脂90％とポリアミド樹
脂10％との混合繊維よりなる海島型複合繊維70％
とポリプロピレン−ポリエチレン系サイドバイサ
イド型複合繊維30％との混合繊維をランドウエツ
バー機又はカード機にかけて、目付90ｇ／m2のラ
ンダムウエブ又はクロスウエブを形成し、該サイ
ドバイサイド型複合繊維のポリエチレン成分の軟
化点以上（120℃〜130℃）に加熱された一対の加
熱・加圧ロール間隙を通過させ、上記ポリエチレ
ン成分の軟化溶融によりウエブ構成繊維相互間を
一体に圧着すると共に、ロール通過時の圧力調整
により、厚さ0.45mm乃至0.18mmで見掛密度を0.2乃
至0.5ｇ／cm3となした不織布シートよりなるアル
カリ電池用セパレーターを形成する。
尚、セパレーターの重量は40〜200ｇ／m2の間
で使用目的に応じて適宜変えて用いられ、また見
掛密度（単位面積当りの重量／厚さ）は0.2ｇ／
cm3未満になると不織布セパレーターは厚みが大で
嵩高となり、セパレーターの強度、寸法安定性及
び電解液の吸液速度が低下し、電池組込時におけ
る作業性が著しく低下する。また嵩高の不織布セ
パレーターの使用は、特に円筒形、角形等のNi
−Cd二次電池に於いて、正極板／セパレータ
ー／負極板集合体の収容量低下の原因となり、電
池の容量低下をひき起し好ましくない。また見掛
密度が0.5ｇ／cm3を超えると、高密度不織布セパ
レーターとなる為、目が詰まり過ぎて電池セパレ
ーターに要求される電解液の吸液保持量が不充分
となり、更に密閉形のNi−Cd二次電池セパレー
ターに要求される電解反応により発生する酸素ガ
スの通過が阻害されるので好ましくなく、適切な
空隙を保つ必要があり、好ましくは0.2〜0.5ｇ／
cm3に調整する。
また、複合接着繊維としてはサイドバイサイド
型の他、芯・鞘型、海島型等の複合繊維を用いる
事ができる。
本発明に用いるポリプロピレン−ポリアミド海
島型複合繊維１は、第１図及び第２図に示す様
に、ポリプロピレン樹脂成分２を海としてポリア
ミド樹脂成分３が島状に点在しており、耐アルカ
リ性に優れたポリプロピレン樹脂成分４とポリエ
チレン樹脂成分５からなる熱接着性複合繊維即
ち、サイドバイサイド型複合繊維６のポリエチレ
ン成分の融着によつてウエブ構成繊維間相互を一
体に接着してセパレーターを構成する。
従つて、セパレーターの主構成繊維であるポリ
プロピレン−ポリアミド海島型複合繊維は初期性
能即ち初期の吸液量は、上記海島型複合繊維と同
じポリプロピレン、ポリアミド樹脂を用いるサイ
ドバイサイド型複合繊維に比べ劣るがポリアミド
成分が電解液により分解脱落後はポリプロピレン
繊維表面が孔明き構造を呈し、非常に多孔質化す
るので、アルカリ電池用セパレーターとしての性
能低下は極力押えられる特性を持つ。
また、繊維間相互の接着繊維となるポリプロピ
レン−ポリエチレン複合繊維の形態は低融点接着
樹脂となるポリエチレン成分が必ず複合繊維表面
の一部、例えばサイドバイサイド型や或は全部を
占める芯鞘型等の複合繊維を用いることがセパレ
ーターとしての強度を得るため必要である。
次に、上記本発明のアルカリ電池用セパレータ
ーＡと、比較例としての従来のポリアミド繊維セ
パレーターＢ、ポリプロピレン繊維セパレーター
Ｃ、ポリアミド繊維とポリプロピレン繊維との混
合繊維セパレーターＤの物性を下表に示した。
The present invention relates to a structure of an alkaline battery separator used in a sealed alkaline battery, particularly a nickel-cadmium storage battery. Conventionally, nonwoven fabrics made of polyamide fibers have been generally used for separators for alkaline batteries, taking advantage of the properties of polyamide fibers such as water absorption and liquid absorption. In addition, in order to further improve the liquid absorption and water absorption properties of polyamide fibers, there are some in which the fibers are eluted with inorganic salts to create a porous structure. By making the fibers porous in this manner, the amount of electrolyte solution retained is uniform, and as a result, the discharge capacity is increased. However, in alkaline batteries, the temperature rise and electrochemical changes in the electrolyte are large under conditions such as high temperatures or continuous overcharging. It has the disadvantage that it is decomposed by solution, its strength is significantly reduced, and it is difficult to withstand long-term use. In addition, there are separators made of non-woven fabric made of polyamide fibers mixed with polypropylene fibers that are resistant to electrolytes, but since the fibers are bonded together by heat welding, the polypropylene fibers shrink significantly during heat welding. There is a problem in that it requires strict process control and it is difficult to manufacture uniform products in large quantities at low cost. Furthermore, there are separators made of non-woven fabrics made of polypropylene resin using a melt-blown process, and non-woven fabrics made using wet-process polypropylene fibers, but although they can satisfy battery properties such as liquid absorption and alkali resistance, they have a drawback in the manufacturing process. Due to its weak mechanical strength, problems such as elongation and cutting of the separator occur during the battery manufacturing process, so it is currently not available in the lineup. Furthermore, a separator has also been devised in which a mixed web of polyamide fibers and polypropylene-polyethylene composite fibers is heated and pressurized to melt the polyethylene component and bond the fibers together. However, there is a problem in that the mixing ratio of the polypropylene-polyethylene composite fibers is very limited. In other words, if the composite fiber content is less than 20%, the adhesive strength will be insufficient and it will not be possible to apply it to the battery assembly process.
In addition, if 20 to 50% of composite fibers are mixed in order to give the tensile strength value (1 kg/cm or more) required for the assembly process, polyamide fibers will be included in the amount of 50% or more, and the electrolyte will decompose the polyamide fibers. , which is undesirable due to the short-circuit phenomenon caused by weakening.
Also, if 50% or more of the above composite fibers are mixed, heating and
The low melting point resin component of the conjugate fiber melted during pressurization is rolled by pressurization, resulting in a significant decrease in air permeability, which adversely affects performance as a separator. As described above, since the mixing ratio with polypropylene-polyethylene composite fibers is extremely limited, and the polyamide fibers are present, the morphology changes significantly due to deterioration, resulting in a large drop in performance. The present invention overcomes the above-mentioned drawbacks and provides a separator for alkaline batteries that can be put to practical use under any conditions. An embodiment of the present invention will be described in detail below. The alkaline battery separator of the present invention has a first
As shown in the figure, 95-70% (weight ratio) of polypropylene resin and 5-30% (weight ratio) of polyamide resin are mixed, and by melt spinning, polypropylene resin component 2 becomes a sea, and polyamide resin component 3 becomes an island shape. 150 to 70% (weight ratio) of sea-island type composite fibers formed scattered in
Using mixed fibers with ~30% (weight ratio). For example, 70% sea-island composite fiber made of a blend of 90% polypropylene resin and 10% polyamide resin.
A mixed fiber of 30% polypropylene-polyethylene side-by-side conjugate fiber is passed through a Landwetsuber machine or a card machine to form a random web or cross web with a basis weight of 90 g/ m2 , and the polyethylene component of the side-by-side conjugate fiber is softened. The fibers of the web are passed through the gap between a pair of heated and pressurized rolls heated to a temperature higher than 120°C to 130°C, and the polyethylene component is softened and melted to press the fibers that make up the web together, and the pressure is adjusted as the fibers pass through the rolls. Thus, an alkaline battery separator made of a nonwoven fabric sheet having a thickness of 0.45 mm to 0.18 mm and an apparent density of 0.2 to 0.5 g/cm 3 is formed. The weight of the separator is between 40 and 200 g/ m2 , depending on the purpose of use, and the apparent density (weight per unit area/thickness) is 0.2 g/m2.
When the thickness is less than cm 3 , the nonwoven fabric separator becomes thick and bulky, and the strength, dimensional stability, and electrolyte absorption rate of the separator decrease, resulting in a significant decrease in workability when assembling a battery. In addition, the use of bulky nonwoven fabric separators is particularly important for cylindrical, square, etc.
- In a Cd secondary battery, it causes a decrease in the capacity of the positive electrode plate/separator/negative electrode plate assembly, which is undesirable because it causes a decrease in battery capacity. If the apparent density exceeds 0.5 g/cm 3 , the separator becomes a high-density nonwoven fabric, which becomes too clogged, resulting in insufficient absorption and retention of electrolyte required for a battery separator. -Cd secondary battery separator is undesirable because it obstructs the passage of oxygen gas generated by the electrolytic reaction required for the separator, and it is necessary to maintain an appropriate gap, preferably 0.2 to 0.5 g/
Adjust to cm3 . Further, as the composite adhesive fiber, in addition to the side-by-side type, core/sheath type, sea-island type, etc. composite fibers can be used. As shown in FIGS. 1 and 2, the polypropylene-polyamide sea-island type composite fiber 1 used in the present invention has a polypropylene resin component 2 as a sea and polyamide resin components 3 scattered in the form of islands, and has alkali resistance. A separator is constructed by bonding the web-constituting fibers together by fusing the polyethylene component of the side-by-side type composite fiber 6, that is, the heat-adhesive conjugate fiber made of excellent polypropylene resin component 4 and polyethylene resin component 5. Therefore, the initial performance of the polypropylene-polyamide sea-island composite fiber, which is the main constituent fiber of the separator, is inferior to the side-by-side composite fiber that uses the same polypropylene or polyamide resin as the sea-island composite fiber, but it is After the components are decomposed and removed by the electrolyte, the surface of the polypropylene fiber exhibits a pore structure and becomes extremely porous, so it has the property of minimizing performance degradation as a separator for alkaline batteries. In addition, the form of polypropylene-polyethylene composite fibers, which serve as adhesive fibers between fibers, is such that the polyethylene component, which serves as a low-melting adhesive resin, always occupies a part of the composite fiber surface, such as a side-by-side type, or a core-sheath type composite that occupies the entire surface. It is necessary to use fibers to obtain strength as a separator. Next, the physical properties of the alkaline battery separator A of the present invention, conventional polyamide fiber separator B, polypropylene fiber separator C, and mixed fiber separator D of polyamide fiber and polypropylene fiber as comparative examples are shown in the table below.
【表】
表中 ◎印…最適 ○…良好 △印…やや
不良 ×印…不良
本発明は上記の如く構成したから、接着繊維と
なるポリプロピレン−ポリエチレン複合接着繊維
の混合繊維の混入割合が接着力、即ち、セパレー
ターの引張強力保持特性にのみ役割が限定され、
セパレーターとして必要かつ十分なる吸着速度及
び吸液率を維持しながら耐久性のある必要強度を
得ることになる。
また、従来のポリアミド繊維のみよりなるセパ
レーターの様に電解液によるセパレーターの分
解・脱落による性能低下がなくなり、電池寿命が
大幅に延長する。
また、上表に示す如く、本発明のセパレーター
は電池特性として吸液速度、吸液量、短絡率、耐
アルカリ性ともに従来セパレーターに比較して全
般に良好な結果を示し、理想的なアルカリ電池用
セパレーターが得られる等の優れ効果を有する発
明である。[Table] In the table, ◎ mark...optimal ○...good △ mark...slightly poor × mark...poor Since the present invention is constructed as described above, the adhesion strength is determined by the mixing ratio of the mixed fibers of polypropylene-polyethylene composite adhesive fibers that serve as the adhesive fibers. , that is, the role is limited only to the tensile strength retention property of the separator,
This results in the required durability and strength being achieved while maintaining the necessary and sufficient adsorption rate and liquid absorption rate as a separator. In addition, unlike conventional separators made only of polyamide fibers, there is no performance deterioration due to decomposition or falling off of the separator due to electrolyte, significantly extending battery life. In addition, as shown in the table above, the separator of the present invention has generally better battery characteristics than conventional separators in terms of liquid absorption rate, liquid absorption amount, short circuit rate, and alkali resistance, making it ideal for use in alkaline batteries. This invention has excellent effects such as the ability to obtain a separator.
第１図は本発明のアルカリ電池用セパレーター
に用いるポリプロピレン−ポリアミド海島型複合
繊維の拡大図、第２図はポリプロピレン−ポリア
ミド海島型複合繊維とポリプロピレン−ポリエチ
レン系サイドバイサイド型複合繊維の接着部拡大
図である。
１……ポリプロピレン−ポリアミド海島型複合
繊維、２……ポリプロピレン樹脂成分、３……ポ
リアミド樹脂成分、４……ポリプロピレン樹脂成
分、５……ポリエチレン樹脂成分、６……サイド
バイサイド型複合繊維。
Figure 1 is an enlarged view of the polypropylene-polyamide sea-island type composite fiber used in the alkaline battery separator of the present invention, and Figure 2 is an enlarged view of the bonded area between the polypropylene-polyamide sea-island type composite fiber and the polypropylene-polyethylene side-by-side type composite fiber. be. 1...Polypropylene-polyamide sea-island type conjugate fiber, 2...Polypropylene resin component, 3...Polyamide resin component, 4...Polypropylene resin component, 5...Polyethylene resin component, 6...Side-by-side type conjugate fiber.
Claims (1)
樹脂成分を島として紡糸された海島型複合繊維
と、ポリプロピレン−ポリエチレン系複合繊維と
の混合繊維からなるクロスウエブ又はランダムウ
エブの加熱、加圧により、該ポリプロピレン−ポ
リエチレン系複合繊維のポリエチレン成分を溶融
圧着してウエブ構成繊維間相互を一体に接着した
見掛密度0.2〜0.5ｇ／cm3の不織布からなることを
特徴とするアルカリ電池用セパレーター。1 The polypropylene resin component is heated and pressurized by heating and pressurizing a cross web or random web made of a mixed fiber of a sea-island type composite fiber spun using a polyamide resin component as an island in the sea and a polypropylene-polyethylene composite fiber. A separator for alkaline batteries characterized by being made of a nonwoven fabric having an apparent density of 0.2 to 0.5 g/cm 3 , which is obtained by melt-pressing the polyethylene component of polyethylene composite fibers and bonding the fibers constituting the web together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57211727A JPS59101763A (en) | 1982-12-01 | 1982-12-01 | Separator for alkaline battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57211727A JPS59101763A (en) | 1982-12-01 | 1982-12-01 | Separator for alkaline battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59101763A JPS59101763A (en) | 1984-06-12 |
| JPH0355938B2 true JPH0355938B2 (en) | 1991-08-26 |
Family
ID=16610597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57211727A Granted JPS59101763A (en) | 1982-12-01 | 1982-12-01 | Separator for alkaline battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59101763A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61224262A (en) * | 1985-03-28 | 1986-10-04 | Nippon Muki Kk | Separator for alkaline storage battery |
| JPS63148539A (en) * | 1986-12-10 | 1988-06-21 | Kanai Hiroyuki | Separator for alkaline battery |
| JPS63158743A (en) * | 1986-12-22 | 1988-07-01 | Kanai Hiroyuki | Separator for alkaline battery |
-
1982
- 1982-12-01 JP JP57211727A patent/JPS59101763A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59101763A (en) | 1984-06-12 |
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