JP2738715B2 - Non-woven fabric for storage batteries - Google Patents
Non-woven fabric for storage batteriesInfo
- Publication number
- JP2738715B2 JP2738715B2 JP63265015A JP26501588A JP2738715B2 JP 2738715 B2 JP2738715 B2 JP 2738715B2 JP 63265015 A JP63265015 A JP 63265015A JP 26501588 A JP26501588 A JP 26501588A JP 2738715 B2 JP2738715 B2 JP 2738715B2
- Authority
- JP
- Japan
- Prior art keywords
- woven fabric
- polypropylene
- nonwoven fabric
- core
- denier
- 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
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
-
- 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
-
- 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)
- Nonwoven Fabrics (AREA)
- Cell Separators (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は，蓄電池用不織布に関するもので，さらに詳
しくは，耐酸性と耐熱性とを兼ね備えた蓄電池用不織布
に関するものである。Description: TECHNICAL FIELD The present invention relates to a non-woven fabric for a storage battery, and more particularly to a non-woven fabric for a storage battery having both acid resistance and heat resistance.
（従来の技術） 従来から，ポリエステル，ナイロン，ポリオレフイン
等の不織布が蓄電池用不織布として使用されており，中
でも要求される性能およびコスト面から，ポリエステル
からなる不織布が広く使用されている。ところが，蓄電
池用不織布に使用される場合，繊維と繊維とを固着させ
ることが必要で，固着させる方法としては，エマルジヨ
ン系バインダーで固着させる方法，ホツトメルトタイプ
バインダーを混繊して固着させる方法，エンボツシング
ローラー等の圧接により固着させる方法，あるいはニー
ドリングにて絡ませて固着させる方法等が採用されてい
る。(Prior Art) Conventionally, non-woven fabrics such as polyester, nylon, polyolefin and the like have been used as non-woven fabrics for storage batteries. Among them, non-woven fabrics made of polyester are widely used from the viewpoint of required performance and cost. However, when used in a non-woven fabric for a storage battery, it is necessary to fix the fibers to each other. As a method of fixing, a method of fixing with an emulsion type binder, a method of mixing and fixing a hot melt type binder, A method of fixing by pressing with an embossing roller or the like, or a method of tangling and fixing by needling is adopted.
しかしながら，上述した方法により得られた不織布
は，いずれの方法から製造されたものであっても，用途
が蓄電池用として使用される場合，特に自動車用バツテ
リーについては，希硫酸溶液に長時間浸漬状態で使用さ
れ，さらに熱がかかるので，耐酸性および耐熱性が要求
されるものである。そのため，不織布に耐薬品性と耐熱
性とを付与せしめる目的で，不織布表面に樹脂被膜加工
が施されているのが現状である。However, the nonwoven fabric obtained by the above-mentioned method, regardless of the method used, is used for storage batteries, especially for automobile batteries. And heat is required, so that acid resistance and heat resistance are required. Therefore, in order to impart chemical resistance and heat resistance to the nonwoven fabric, a resin coating is applied to the surface of the nonwoven fabric at present.
（発明が解決しようとする課題） ところが，ポリエステルからなる不織布に上記樹脂被
膜加工を施したものでは，繊維表面に均一に樹脂を付与
することが難しく，耐酸性の向上が認められず，不織布
の繊維表面からの溶解（減量化）が起こり，これに熱の
作用が加わると，溶解作用がさらに加速されることとな
り，不織布が劣化する問題があった。また、溶解した不
織布の一部がバツテリーの底に堆積し，極板と極板との
間で短絡が発生することもあり，バツテリーの寿命が短
くなる欠点があった。(Problems to be Solved by the Invention) However, in the case where the above-mentioned resin coating is applied to a non-woven fabric made of polyester, it is difficult to uniformly apply a resin to the fiber surface, and no improvement in acid resistance is observed. Dissolution (reduction in weight) from the fiber surface occurs, and when the action of heat is added thereto, the dissolution action is further accelerated, and there is a problem that the nonwoven fabric is deteriorated. In addition, a part of the dissolved nonwoven fabric is deposited on the bottom of the battery, and a short circuit may occur between the electrode plates, which has a disadvantage that the life of the battery is shortened.
本発明は，このような従来のポリエステルフイラメン
ト不織布からなる蓄電池用不織布の欠点を解消し，耐酸
性を向上させ，かつ熱の作用が加わっても劣化を起こさ
ず，不織布表面を乱すことのない蓄電池用不織布を提供
しようとするものである。The present invention solves the drawbacks of the conventional non-woven fabric for a storage battery made of a polyester filament non-woven fabric, improves the acid resistance, and does not deteriorate even under the action of heat and does not disturb the non-woven fabric surface. It is intended to provide a nonwoven fabric for use.
（課題を解決するための手段） すなわち，本発明は，部分的に熱圧接されている連続
フイラメントからなる不織シートであり，該連続フイラ
メントはポリプロピレンがポリエチレンテレフタレート
の表面を全面的に覆っている２成分芯鞘構造からなり，
その繊度が２〜20デニールで，該芯成分のポリエチレン
テレフタレートの繊度が１〜15デニールであり、該ポリ
エチレンテレフタレートと該ポリプロピレンの重量比が
1/5〜3/1の範囲であることを特徴とする蓄電池用不織布
を要旨とするものである。(Means for Solving the Problems) That is, the present invention is a nonwoven sheet composed of a continuous filament that is partially hot-pressed, wherein the continuous filament entirely covers the surface of polyethylene terephthalate with polypropylene. It consists of a two-component core-sheath structure,
The fineness of the polyethylene terephthalate of the core component is 1 to 15 denier, and the weight ratio of the polyethylene terephthalate to the polypropylene is 2 to 20 denier.
A non-woven fabric for a storage battery, wherein the non-woven fabric is in the range of 1/5 to 3/1.
以下，本発明について詳述する。 Hereinafter, the present invention will be described in detail.
本発明で用いられるポリプロピレン（PP）は，通常，
工業的に利用されているポリプロピレンであり，メルト
メンデツクス値（MI値）が１〜40g/10分のものが好まし
い。The polypropylene (PP) used in the present invention is usually
Polypropylene which is industrially used and preferably has a melt mendix value (MI value) of 1 to 40 g / 10 minutes.
また，本発明で用いられるポリエチレンテレフタレー
トは，市販または工業的に利用されている通常のポリエ
チレンテレフタレートのうち，特に繊維用として市販さ
れているものであればよく，具体的には固有粘度は，フ
エノールと四塩化エタンとの等重量混合物を溶媒として
20℃で測定した値であり,0.50〜1.20の範囲のものが好
ましい。The polyethylene terephthalate used in the present invention may be any commercially available or industrially used ordinary polyethylene terephthalate, particularly if it is commercially available for fibers. Specifically, the intrinsic viscosity is phenol. Equivalent mixture of water and ethane tetrachloride as solvent
It is a value measured at 20 ° C., preferably in the range of 0.50 to 1.20.
本発明における繊維の２成分芯鞘構造は，芯であるポ
リエチレンテレフタレートの表面を鞘であるポリプロピ
レンが全面にわたって覆っているような構造であればよ
く，断面形状でいえば，一般的な中心を共有する同心円
状のものの他，芯成分が偏心しているものや，芯鞘とも
円形以外の異形断面のものでもよい。The two-component core-sheath structure of the fiber in the present invention may be any structure in which the surface of polyethylene terephthalate as the core is entirely covered with polypropylene as the sheath. In addition to the concentric shape, the core component may be eccentric, or the core and sheath may have an irregular cross section other than a circular shape.
芯成分と鞘成分との重量比を1/5〜3/1と限定したの
は，この比が3/1を超えると，ポリプロピレンの量が不
足して芯部を全面的に覆わない場合があり，そのため十
分な耐薬品性の効果が得られないことになるからであ
る。また,1/5未満の場合には，不織布自体の強度を担っ
ている芯成分の量が不足するため，シートとしての強度
が弱くなたり，不織布の腰がなくなるという理由によ
る。The weight ratio between the core component and the sheath component is limited to 1/5 to 3/1. If this ratio exceeds 3/1, the amount of polypropylene may be insufficient and the core may not be completely covered. This is because a sufficient effect of chemical resistance cannot be obtained. On the other hand, if the ratio is less than 1/5, the amount of the core component that is responsible for the strength of the nonwoven fabric itself is insufficient, so that the strength as a sheet is weakened and the nonwoven fabric loses its rigidity.
また，芯成分のポリエステル自体のデニールは，直接
本発明の蓄電池用不織布の物性を支配するものであり，
薬品処理，熱処理，あるいは表面加工等の諸工程に耐え
るために，少なくとも２デニール以上でなければなら
ず，また,15デニール以上になると，必然的に複合糸と
しての全デニールも大きくなり，不織布を構成するフイ
ラメントの数が減少し，目の粗い不織布になり，バツテ
リーの電極表面を覆っている不織布に空隙が生じ，バツ
テリー液で発生する気泡を含んで電気抵抗が大きくな
り，起電力低下の原因となる。本発明の効果を発揮する
ためには，前記した理由から，全デニールで２〜20デニ
ール，芯成分としては１〜15デニールでなければならな
い。Further, the denier of the polyester itself as the core component directly governs the physical properties of the nonwoven fabric for a storage battery of the present invention.
In order to withstand various processes such as chemical treatment, heat treatment, and surface processing, it must be at least 2 denier, and if it exceeds 15 denier, the total denier as a composite yarn naturally increases, and the The number of constituent filaments is reduced, the coarse non-woven fabric is formed, voids are formed in the non-woven fabric covering the battery electrode surface, and the electric resistance is increased, including the bubbles generated by the battery liquid, causing a decrease in electromotive force. Becomes In order to achieve the effects of the present invention, the denier must be 2 to 20 deniers and the core component must be 1 to 15 deniers for the reasons described above.
このような２成分芯鞘構造をもつ連続フイラメント
は，従来公知の複合紡糸装置を用いて製造することがで
きる。また，この連続フイラメントをウエブにするに
は，従来公知の一般的な方法，例えば，空気圧を利用し
て繊維を延伸しつつ，一般的に使用されている開繊装置
を利用して開繊した後，移動する網状態の上に堆積しつ
つ移送するというような方法が一般的である。Such a continuous filament having a two-component core-sheath structure can be manufactured using a conventionally known composite spinning apparatus. In addition, in order to make the continuous filament into a web, a conventionally known general method, for example, a fiber is drawn by using a generally used fiber opening device while drawing the fiber using air pressure. Later, it is common to transfer the material while depositing it on a moving net.
（作 用） 本発明の不織布は，不織布を構成する連続フイラメン
トの表面が鞘成分であるポリプロピレンで覆われている
ため，芯部のポリエステルが直接薬品に触れず、さらに
ポリプロピレン自体がもっている耐薬品性，耐熱性の効
果を十分に発揮させたものである。一方，芯成分がある
ポリエステルにより，ポリプロピレン100％不織布のも
つ柔らかさに適度な硬さと腰を与えたので，加工時の操
業性が向上した。また，高温雰囲気下状態に暴露して
も，不織布の熱による収縮率は小さく，寸法安定性に優
れた面も兼ね備えている。(Operation) In the nonwoven fabric of the present invention, since the surface of the continuous filament constituting the nonwoven fabric is covered with polypropylene, which is a sheath component, the polyester at the core does not directly come into contact with the chemical, and furthermore, the chemical resistance that the polypropylene itself has The effect of heat resistance and heat resistance is fully exhibited. On the other hand, the polyester with a core component provided moderate hardness and stiffness to the softness of 100% polypropylene non-woven fabric, improving operability during processing. Even when exposed to a high-temperature atmosphere, the non-woven fabric has a small shrinkage due to heat and has a surface with excellent dimensional stability.
（実施例） 以下，実施例による具体的に説明する。なお，実施例
中に示した蓄電池用不織布の物性値の測定法を次に示
す。(Examples) Hereinafter, specific examples will be described. In addition, the measuring method of the physical property value of the nonwoven fabric for storage batteries shown in the examples is shown below.
（１） 耐薬品性 10cm×10cmの試験片を40％硫酸液の入った容器に浸漬
し，密封後,80℃熱水槽中で４週間処理し，その減量率
を求めた。(1) Chemical resistance A test piece of 10 cm × 10 cm was immersed in a container containing 40% sulfuric acid solution, sealed, treated in a hot water bath at 80 ° C. for 4 weeks, and the weight loss rate was determined.
（２） 耐熱性 JIS L−1042に準じてサンプリングし，熱風循環乾燥
機で150℃×15分間フリー処理し，収縮率を求めた。(2) Heat resistance Sampling was performed according to JIS L-1042, and the sample was subjected to a free treatment with a hot air circulating drier at 150 ° C for 15 minutes to determine the shrinkage.
（３） 電気抵抗 JIS C−2313に準じて測定した。(3) Electric resistance Measured according to JIS C-2313.
（４） ポリプロピレンの融点 パーキンエルマー社製DSC−2C型の示差走査熱量計を
用い，昇温速度20℃／分で測定した値である。(4) Melting point of polypropylene This value was measured at a heating rate of 20 ° C / min using a DSC-2C differential scanning calorimeter manufactured by PerkinElmer.
（５） ポリエステルの固有粘度 フエノールと四塩化エタンの等重量混合溶媒を用い，
濃度0.5g/100ml,温度20℃で測定した値である。(5) Intrinsic viscosity of polyester Using an equal weight mixed solvent of phenol and ethane tetrachloride,
These values were measured at a concentration of 0.5 g / 100 ml and a temperature of 20 ° C.
実施例および比較例 固有粘度が0.72のポリエステルを芯成分とし,ASTM−
Ｄ−1238（Ｅ）法によるメルトインデツクス値が5.0g/1
0分，融点168℃であるポリプロピレンを鞘成分とする複
合糸を作り，その単糸繊度が3,15デニール，芯成分に対
する鞘成分重量比が第１表に示す比率でフイラメントを
紡出し，空気圧により開繊した後，移動する多孔質帯状
体上に堆積し，不織布とした。Examples and Comparative Examples A polyester having an intrinsic viscosity of 0.72 was used as a core component, and ASTM-
Melt index value by D-1238 (E) method is 5.0g / 1
A composite yarn with polypropylene as a sheath component having a melting point of 168 ° C for 0 minutes was produced, and the filament was spun at a filament fineness of 3,15 denier, and the weight ratio of the sheath component to the core component was as shown in Table 1. After the fiber was opened, it was deposited on the moving porous strip to form a nonwoven fabric.
この不織布の耐薬品性，耐熱性を測定し，得られた結
果を第１表に示す。The chemical resistance and heat resistance of this nonwoven fabric were measured, and the obtained results are shown in Table 1.
第１表から明らかなように，本発明の不織布は，耐薬
品性，耐熱性が優れている。 As is clear from Table 1, the nonwoven fabric of the present invention has excellent chemical resistance and heat resistance.
（発明の効果） 本発明の蓄電池用不織布は，鞘部に配したポリプロピ
レンの硫酸に対する耐性により，従来の蓄電池用不織布
のように耐薬品性が悪くなったりすることがない。ま
た，芯部のポリエステルにより，耐熱性も優れ，かつ寸
法安定性に優れた性質を有する蓄電池用不織布が提供さ
れる。(Effect of the Invention) The nonwoven fabric for a storage battery of the present invention does not deteriorate chemical resistance unlike the conventional nonwoven fabric for a storage battery due to the resistance of the polypropylene disposed in the sheath to sulfuric acid. In addition, the polyester at the core provides a nonwoven fabric for a storage battery having excellent heat resistance and excellent dimensional stability.
Claims (1)
トからなる不織シートであり，該連続フイラメントはポ
リプロピレンがポリエチレンテレフタレートの表面を全
面的に覆っている２成分芯鞘構造からなり，その繊度が
２〜20デニールで，該芯成分のポリエチレンテレフタレ
ートの繊度が１〜15デニールであり、該ポリエチレンテ
レフタレートと該ポリプロピレンヒの重量比が1/5〜3/1
の範囲であることを特徴とする蓄電池用不織布。1. A non-woven sheet comprising a continuous filament which is partially hot-pressed, said continuous filament having a two-component core-sheath structure in which polypropylene entirely covers the surface of polyethylene terephthalate. Is 2 to 20 denier, the fineness of polyethylene terephthalate of the core component is 1 to 15 denier, and the weight ratio of the polyethylene terephthalate to the polypropylene ar is 1/5 to 3/1.
A non-woven fabric for a storage battery, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63265015A JP2738715B2 (en) | 1988-10-19 | 1988-10-19 | Non-woven fabric for storage batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63265015A JP2738715B2 (en) | 1988-10-19 | 1988-10-19 | Non-woven fabric for storage batteries |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02112153A JPH02112153A (en) | 1990-04-24 |
| JP2738715B2 true JP2738715B2 (en) | 1998-04-08 |
Family
ID=17411396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63265015A Expired - Lifetime JP2738715B2 (en) | 1988-10-19 | 1988-10-19 | Non-woven fabric for storage batteries |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2738715B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5128035B2 (en) * | 2001-09-28 | 2013-01-23 | 日本バイリーン株式会社 | Battery separator and battery using the same |
| ITPD20070356A1 (en) * | 2007-10-24 | 2009-04-25 | Orv Spa | SPACER ELEMENT FOR LEAD-IN GELLED-TYPE ACCUMULATORS OR FOR STILLS OF THE ACID-FREE TYPE |
-
1988
- 1988-10-19 JP JP63265015A patent/JP2738715B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02112153A (en) | 1990-04-24 |
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