JP2001057181A - Aluminum foil for battery wrapping material and battery wrapping material using the same - Google Patents
Aluminum foil for battery wrapping material and battery wrapping material using the sameInfo
- Publication number
- JP2001057181A JP2001057181A JP11272833A JP27283399A JP2001057181A JP 2001057181 A JP2001057181 A JP 2001057181A JP 11272833 A JP11272833 A JP 11272833A JP 27283399 A JP27283399 A JP 27283399A JP 2001057181 A JP2001057181 A JP 2001057181A
- Authority
- JP
- Japan
- Prior art keywords
- aluminum foil
- acid
- resin
- wrapping material
- packaging material
- 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.)
- Granted
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
Abstract
Description
【０００１】[0001]
【発明の技術分野】この発明は耐食性に優れた電池包装
材料用アルミニウム箔およびそれを使用した電池包装材
料に関する。The present invention relates to an aluminum foil for a battery packaging material having excellent corrosion resistance and a battery packaging material using the same.
【０００２】[0002]
【従来の技術】従来、アルミニウム箔を用いた包装用材
料は、主に食料品、飲料品、薬品、日用品、各種部品等
を包装、梱包するために使用されており、耐食性を付与
する場合には、熱接着剤層としてアクリロニトリル樹脂
等を積層する構成があったが、これらの樹脂は非常に高
価であり、包装用材料としてほとんど普及していない。
また、ナイロンやＥＶＯＨを積層する構成も提案されて
いるが性能面で限界があり、耐食性を向上させるため積
層枚数を多くしたり厚みを厚くすると、結局コストアッ
プにつながることになる。これに対しアルミニウム箔を
シランカップリング剤やチタネート系の処理剤でコーテ
ィング処理する方法も提案されているが、均一な塗布が
困難であったり、内容物が限定される等の問題のためほ
とんど実用化されていない。これまで包装材料の分野で
は、アルミニウム箔自体の表面を改質する試みはほとん
どされていなかった。また、アルミニウム箔と積層させ
る従来の樹脂、例えばナイロンやＥＶＯＨは、アルミニ
ウム箔との接着性や接着強度に問題があり、長期間の使
用に耐えることが困難であった。2. Description of the Related Art Conventionally, packaging materials using aluminum foil are mainly used for packaging and packing foodstuffs, beverages, medicines, daily necessities, various parts, and the like. Has a configuration in which an acrylonitrile resin or the like is laminated as a thermal adhesive layer, but these resins are very expensive and are hardly popular as packaging materials.
In addition, a configuration in which nylon or EVOH is laminated has been proposed, but there is a limit in terms of performance. If the number of laminated layers is increased or the thickness is increased in order to improve corrosion resistance, the cost will eventually increase. On the other hand, there has been proposed a method of coating an aluminum foil with a silane coupling agent or a titanate-based treating agent. However, it has been practically used because uniform coating is difficult or the contents are limited. Not converted. Until now, there have been few attempts in the field of packaging materials to modify the surface of the aluminum foil itself. Further, conventional resins to be laminated with an aluminum foil, such as nylon and EVOH, have problems in adhesiveness and adhesive strength to the aluminum foil, and have been difficult to withstand long-term use.
【０００３】[0003]
【発明の課題】そこで、この発明の課題は、アルミニウ
ム箔自体の表面を簡易な方法で改質して耐食性を向上さ
せることである。この発明の他の課題は、耐食性の向上
したアルミニウム箔を用いた電池包装材料を提供するこ
とである。An object of the present invention is to improve the corrosion resistance by modifying the surface of the aluminum foil itself by a simple method. Another object of the present invention is to provide a battery packaging material using an aluminum foil having improved corrosion resistance.
【０００４】[0004]
【課題の解決手段】上記の課題を解決するため、この発
明のアルミニウム箔は、少なくとも片面を、リン酸、リ
ン酸塩、クロム酸、クロム酸塩、フッ酸、フッ酸塩から
選ばれた１種以上の溶液により処理したことを特徴とす
る。前記のように処理したアルミニウム箔をさらに熱処
理することが好ましい。In order to solve the above problems, an aluminum foil of the present invention has at least one surface selected from phosphoric acid, phosphate, chromate, chromate, hydrofluoric acid and hydrofluoric acid. It is characterized by being treated with at least one kind of solution. It is preferable to further heat-treat the aluminum foil treated as described above.
【０００５】またこのアルミニウム箔の内容物と直接接
触する面に、ポリエチレンとポリプロピレンとのランダ
ム共重合樹脂層を積層して電池包装材料を形成する。前
記のアルミニウム箔とポリエチレンとポリプロピレンと
のランダム共重合樹脂層とを積層するために、ポリエチ
レンとランダム共重合させた酸変性ポリプロピレン樹
脂、または酸変性ポリプロピレンと熱硬化型のエポキシ
樹脂とのブレンド樹脂のいずれか１種以上を使用するの
が好ましい。A battery packaging material is formed by laminating a random copolymer resin layer of polyethylene and polypropylene on the surface of the aluminum foil which is in direct contact with the contents. For laminating the aluminum foil and a random copolymer resin layer of polyethylene and polypropylene, an acid-modified polypropylene resin randomly copolymerized with polyethylene, or a blend resin of an acid-modified polypropylene and a thermosetting epoxy resin It is preferable to use at least one of them.
【０００６】[0006]
【実施の形態】以下、この発明の実施形態を添付図面に
基づいて説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.
【０００７】図１に示すように、この発明の電池包装材
料用アルミニウム箔１は、アルミニウム基材２に化学処
理皮膜３を形成したものである。As shown in FIG. 1, an aluminum foil 1 for a battery packaging material according to the present invention has a chemically treated film 3 formed on an aluminum substrate 2.
【０００８】アルミニウム基材２は、公知のアルミニウ
ム箔およびアルミニウム板が使用でき、その成分も公知
の純アルミニウムおよびアルミニウム合金が使用でき
る。具体的には、厚み１５〜１５０μｍ程度のアルミニ
ウム箔を用いるのがよい。厚み１５μｍ未満では後記工
程中に変形や亀裂が生じる恐れがあり、避けるべきであ
る。一方厚み１５０μｍを超えると包装用材料としての
コスト、柔軟性、成形性、重量増加の点で好ましくな
い。なお、アルミニウムの純度は特に制限されず、工業
用の純アルミニウム、（ＪＩＳ）３００３、３００４、
５０５２、８０２１、８０７９等の合金等公知のものが
採用でき、２種以上を積層させたクラッド材を用いても
差し支えない。また調質についても、焼きなまし材（Ｏ
材）、圧延まま材（Ｈ材）、それらの中間材（半硬材）
のいずれでも適用可能で要求特性に応じて適宜選択でき
る。また、必要に応じて水、洗剤、酸、アルカリまたは
有機溶剤等で洗浄等を施しても良い。As the aluminum substrate 2, known aluminum foils and aluminum plates can be used, and the components thereof can also be known pure aluminum and aluminum alloys. Specifically, it is preferable to use an aluminum foil having a thickness of about 15 to 150 μm. If the thickness is less than 15 μm, there is a possibility that deformation or cracks may occur during the later-described process, and it should be avoided. On the other hand, if the thickness exceeds 150 μm, it is not preferable in terms of cost, flexibility, moldability, and weight increase as a packaging material. The purity of the aluminum is not particularly limited, and pure aluminum for industrial use, (JIS) 3003, 3004,
Known materials such as alloys such as 5052, 8021, and 8079 can be adopted, and a clad material in which two or more kinds are laminated may be used. In addition, for tempering,
Material), as-rolled material (H material), their intermediate material (semi-hard material)
Any of the above is applicable and can be appropriately selected according to required characteristics. If necessary, washing may be performed with water, a detergent, an acid, an alkali or an organic solvent.
【０００９】前記アルミニウム基材２の少なくとも一部
以上、好ましくは片面あるいは両面に化学処理皮膜３を
形成することにより耐食性アルミニウム箔１を提供でき
る。片面に処理する場合は、容器または袋の内面となる
側に処理を施せばよい。処理剤としては、リン酸、クロ
ム酸、フッ酸、リン酸塩、クロム酸塩、フッ酸塩から選
ばれる少なくとも１種以上を用いる。処理剤の濃度は
０．０２重量％〜３０重量％が好ましく、残部を溶剤と
すればよい。溶剤には水、アルコール（メタノール・エ
タノール・プロパノール・ヘキサノール・ペンタノー
ル）等を用いることができる。また必要に応じて蓚酸、
硫酸、水ガラス（珪酸）、重金属酸およびそれらの塩、
化合物等を添加することもできる。さらに必要に応じて
ｐＨ調整剤、粘度調整剤等を適量添加してもよい。処理
方法・条件等は、処理剤等の種類や濃度によって適宜決
めればよく、この発明を限定するものではないが、例え
ばロール・コーター、バーコーター、ドクターブレード
等による塗布、スプレー塗装、刷毛塗り、浸漬等の手段
によって処理できる。塗布量・処理時間は前記アルミニ
ウム基材２に化学皮膜３が形成されれば特に規定される
ものではないが、浸漬法の場合は１秒〜６００秒程度が
好ましく、塗布の場合は（乾燥前重量）０．５ｇ〜５０
ｇ／ｍ2 程度が適当である。処理温度（溶液温度）は室
温〜９０℃程度が好ましい。処理後は、必要に応じて水
洗浄、自然乾燥、熱風乾燥等を実施すればよい。The corrosion-resistant aluminum foil 1 can be provided by forming a chemical treatment film 3 on at least a part or more, preferably on one or both sides of the aluminum substrate 2. When the treatment is performed on one side, the treatment may be performed on the side to be the inner surface of the container or the bag. As the treating agent, at least one selected from phosphoric acid, chromic acid, hydrofluoric acid, phosphate, chromate, and hydrofluoric acid is used. The concentration of the treating agent is preferably 0.02% by weight to 30% by weight, and the remainder may be a solvent. As the solvent, water, alcohol (methanol / ethanol / propanol / hexanol / pentanol) or the like can be used. If necessary, oxalic acid,
Sulfuric acid, water glass (silicic acid), heavy metal acids and their salts,
Compounds and the like can also be added. Further, if necessary, an appropriate amount of a pH adjuster, a viscosity adjuster, or the like may be added. The treatment method and conditions may be appropriately determined depending on the type and concentration of the treatment agent, and the present invention is not limited thereto.For example, a roll coater, a bar coater, application by a doctor blade, spray coating, brush coating, It can be treated by means such as immersion. The amount of coating and the treatment time are not particularly limited as long as the chemical film 3 is formed on the aluminum base material 2. However, in the case of the dipping method, it is preferably about 1 to 600 seconds. Weight) 0.5g-50
g / m 2 is appropriate. The processing temperature (solution temperature) is preferably from room temperature to about 90 ° C. After the treatment, washing with water, natural drying, hot-air drying and the like may be performed as necessary.
【００１０】前記アルミニウム箔１は、上記化学皮膜処
理により耐食性が改善されるが、さらに改善させる場合
は、上記処理済アルミニウム箔を１２０〜３００℃、好
ましくは１５０〜２５０℃で乾燥及び加熱処理すればよ
い。１２０℃未満では加熱の効果に乏しく、処理剤が十
分にアルミニウム表面と反応しないためと考えられる。
一方３００℃を超える温度で熱処理を行っても効果が乏
しくなる傾向にあり、化学処理皮膜３が過加熱により一
部亀裂等が生じるためではないかと考えられる。加熱方
法は、連続式、バッチ式のいずれでもよく、特に限定さ
れることはないが、好ましくは１０秒〜３０分程度設定
温度で保持すればよい。加熱処理によって上記化学処理
皮膜３はより強固なものとなり耐食性や皮膜接着性が改
善される。なお、この加熱処理は、後記積層体の製造工
程中に行っても同様の効果が得られる。Although the corrosion resistance of the aluminum foil 1 is improved by the above chemical film treatment, when the aluminum foil 1 is further improved, the treated aluminum foil is dried and heat-treated at 120 to 300 ° C., preferably 150 to 250 ° C. I just need. If the temperature is lower than 120 ° C., the effect of heating is poor, and it is considered that the treating agent does not sufficiently react with the aluminum surface.
On the other hand, even if the heat treatment is performed at a temperature exceeding 300 ° C., the effect tends to be poor, and it is considered that the chemical treatment film 3 may partially crack due to overheating. The heating method may be any of a continuous method and a batch method, and is not particularly limited. Preferably, the heating method may be maintained at a set temperature for about 10 seconds to 30 minutes. By the heat treatment, the chemically treated film 3 becomes stronger and the corrosion resistance and the film adhesion are improved. Note that the same effect can be obtained even if this heat treatment is performed during the later-described manufacturing process of the laminate.
【００１１】電池包装材料として上記のアルミニウム箔
１は優れた耐食性を示すが、より長期間安定した使用の
ためには、包装体を形成する最内層に用いる熱接着性樹
脂（フィルム）をも検討する必要がある。従来は、最内
層の熱接着性樹脂としてホモポリプロピレンやブロック
共重合タイプの樹脂が用いられていたが、これらの樹脂
では成型時や最終製品の形態での経時により、クラック
が入り、電解液の漏洩が生じることがある。この発明に
おいては、図２に示すように、ポリエチレンとポリプロ
ピレンのランダム共重合樹脂（フィルム）層４を形成
し、包装材料１ａとしている。この樹脂層４を積層する
ことにより長期間、安定した使用に耐えることができ
る。この場合のポリプロピレン樹脂は酸変性ポリプロピ
レンであっても通常の酸変性でないポリプロピレンであ
ってもよいが前者の酸変性ポリプロピレン樹脂の方が好
ましい。なお、熱接着性樹脂層（フィルム）４の厚みは
１０〜７０μｍが好ましく、１０μｍ未満の場合には十
分な接着力が得られにくく、７０μｍを超えてもコスト
アップや熱接着時の接着不良の原因となるので、不必要
に厚くする必要はない。なお、ヒートシール条件は、積
層構成や積層厚みによって適宜選択できるが、通常１４
０〜２６０℃で１〜３秒程度である。またシール後の断
面形状が凹型となるようなリングシール（線シールとも
いう）を実施することもできる。Although the above-mentioned aluminum foil 1 exhibits excellent corrosion resistance as a battery packaging material, a heat-adhesive resin (film) used for the innermost layer forming the package is also studied for more stable use over a long period of time. There is a need to. Conventionally, a homopolypropylene or a block copolymer type resin was used as the innermost layer of the thermoadhesive resin. Leaks may occur. In the present invention, as shown in FIG. 2, a random copolymer resin (film) layer 4 of polyethylene and polypropylene is formed to be a packaging material 1a. By laminating the resin layer 4, stable use can be endured for a long time. In this case, the polypropylene resin may be an acid-modified polypropylene or a normal non-acid-modified polypropylene, but the former acid-modified polypropylene resin is more preferable. The thickness of the heat-adhesive resin layer (film) 4 is preferably from 10 to 70 μm, and if it is less than 10 μm, it is difficult to obtain a sufficient adhesive strength. It does not need to be unnecessarily thick because it causes it. The heat sealing conditions can be appropriately selected depending on the lamination structure and lamination thickness.
It is about 1-3 seconds at 0-260 ° C. Further, a ring seal (also referred to as a line seal) in which the cross-sectional shape after the seal becomes concave can be implemented.
【００１２】図３に示すように、前記化学皮膜処理アル
ミニウム箔１と熱接着性樹脂層（フィルム）４との積層
に用いる接着剤（アンカーコート剤）層５として、
（Ａ）ポリエチレンとランダム共重合させた酸変性ポリ
プロピレン樹脂、または（Ｂ）酸変性ポリプロピレンと
熱硬化型のエポキシ樹脂とのブレンド樹脂のいずれか１
種以上を使用した接着剤が、可とう性および初期接着力
を高め、クラック防止および耐内容物性を向上させるこ
とができる。この接着剤の好ましい塗布量は、（乾燥後
重量）０．１ｇ／ｍ2 〜５ｇ／ｍ2 で、塗布後６０〜２
００℃程度で１０秒〜３０分程度乾燥を行うことが望ま
しい。前記酸変性ポリプロピレン樹脂とは、無水マレイ
ン酸、無水フタル酸、無水シトラコン酸、アクリル酸、
イタコン酸、シトラコン酸等により変性されたポリプロ
ピレンをいう。また、前記エポキシ樹脂とは、分子中に
１個以上のエポキシ基を有する有機高分子化合物であっ
て、例えばビスフェノールＡ型エポキシ樹脂、レゾール
型エポキシ樹脂、グリセリントリエーテル型エポキシ樹
脂、その他のいわゆる脂環型エポキシ樹脂等をいい、さ
らにこれらの誘導体も含まれる。硬化剤としては、イソ
シアネート類、アミン類、酸無水物、ポリアミド樹脂、
フェノール樹脂、またはブチル化尿素ホルムアルデヒド
樹脂等の内いづれか１種以上を用いることができる。As shown in FIG. 3, an adhesive (anchor coating agent) layer 5 used for laminating the chemically coated aluminum foil 1 and the heat-adhesive resin layer (film) 4 is as follows.
Either (A) an acid-modified polypropylene resin randomly copolymerized with polyethylene, or (B) a blend resin of an acid-modified polypropylene and a thermosetting epoxy resin
Adhesives using more than one species can increase flexibility and initial adhesion, prevent cracking and improve content resistance. Preferred coating weight of the adhesive, with (weight after drying) 0.1g / m 2 ~5g / m 2, after coating 60-2
It is desirable to perform drying at about 00 ° C. for about 10 seconds to 30 minutes. The acid-modified polypropylene resin, maleic anhydride, phthalic anhydride, citraconic anhydride, acrylic acid,
A polypropylene modified with itaconic acid, citraconic acid or the like. The epoxy resin is an organic polymer compound having one or more epoxy groups in a molecule, for example, a bisphenol A type epoxy resin, a resole type epoxy resin, a glycerin triether type epoxy resin, and other so-called fats. It refers to a cyclic epoxy resin and the like, and further includes derivatives thereof. As a curing agent, isocyanates, amines, acid anhydrides, polyamide resins,
One or more of phenol resin and butylated urea-formaldehyde resin can be used.
【００１３】以上、化学皮膜処理されたアルミニウム箔
１、熱接着性樹脂層４および接着剤層５が電池用包装材
料１ａの主要構成要素であるが、これ以外に必要に応じ
てアルミニウム基材２外面に外装樹脂フィルムや化学皮
膜処理されたアルミニウム箔１と熱接着性樹脂層４との
間に、さらに１層以上の中間樹脂フィルムをこの発明の
効果を損わない範囲内で積層させてもよい。As described above, the aluminum foil 1, the heat-adhesive resin layer 4, and the adhesive layer 5 which have been subjected to the chemical film treatment are the main components of the battery packaging material 1a. Even if one or more intermediate resin films are further laminated between the heat-resin resin layer 4 and the aluminum foil 1 whose outer surface has been subjected to an exterior resin film or a chemical film treatment within a range that does not impair the effects of the present invention. Good.
【００１４】外装樹脂フィルム・中間樹脂フィルムは、
厚み９μｍ以上、好ましくは１２〜５０μｍの樹脂フィ
ルム、具体的にはポリアミド、高密度ポリエチレン、ポ
リプロピレン、ＰＥＴ（ポリエチレンテレフタレート）
等の１種または２種以上を使用できる。外装樹脂フィル
ム・中間樹脂フィルムの積層・接着方法は、特に限定さ
れるものではなく、公知の方法、例えば２液硬化型ウレ
タン系接着剤等を用いたドライ・ラミネーション、共押
出し、押出しコート、アンカーコート剤を用いた熱ラミ
ネーション等による方法が採用できる。The exterior resin film and the intermediate resin film are
Resin film having a thickness of 9 μm or more, preferably 12 to 50 μm, specifically, polyamide, high-density polyethylene, polypropylene, PET (polyethylene terephthalate)
One or more of these can be used. The method of laminating and bonding the exterior resin film / intermediate resin film is not particularly limited, and is a known method, for example, dry lamination using a two-component curable urethane-based adhesive, co-extrusion, extrusion coating, anchoring. A method such as thermal lamination using a coating agent can be adopted.
【００１５】また任意の層に必要に応じてさらにアンカ
ーコート層や印刷層、装飾層、オーバーコート層、接着
剤層等を形成しても差し支えない。[0015] If necessary, an anchor coat layer, a printed layer, a decorative layer, an overcoat layer, an adhesive layer, etc. may be further formed on any layer.
【００１６】上記各構成要素を積層後に、必要に応じて
最終の加熱処理を施すことにより、より各層の接着強度
を向上させることもできる。この場合の処理温度は６０
〜１８０℃程度で、１０秒〜１０分程度が好ましい。After laminating the above components, a final heat treatment may be applied as necessary to further improve the adhesive strength of each layer. The processing temperature in this case is 60
The temperature is preferably about 180 ° C. and about 10 seconds to 10 minutes.
【００１７】この発明の包装材料１ａを容器に成形する
場合には、公知のプレス機、例えば油圧プレス、機械式
（クランク）プレス、水圧プレス、手動プレス等が使用
でき、特に限定されるものではないが、通常金型・木型
・樹脂型等を用いてプレス成形するのが好ましい。成形
容器の形や大きさは用途や目的に応じて適宜設定され
る。一方、袋として使用する場合は、公知の形態、例え
ば平袋、角袋、自立袋、ガセット袋、ピロー袋等に成
形、製袋できる。In the case of molding the packaging material 1a of the present invention into a container, a known press machine, for example, a hydraulic press, a mechanical (crank) press, a hydraulic press, a manual press, or the like can be used. However, it is usually preferable to press-mold using a mold, a wooden mold, a resin mold and the like. The shape and size of the molded container are appropriately set according to the application and purpose. On the other hand, when used as a bag, it can be formed into a known form, for example, a flat bag, a square bag, a self-standing bag, a gusset bag, a pillow bag, or the like.
【００１８】この発明のアルミニウム箔１および包装材
料１ａは、有機電解質電池等の電池用の容器・袋として
特に有用である。The aluminum foil 1 and the packaging material 1a of the present invention are particularly useful as containers and bags for batteries such as organic electrolyte batteries.
【００１９】[0019]
【実施例及び比較例】厚み５０μｍの原反アルミニウム
箔（１Ｎ３０：東洋アルミニウム株式会社製）の全面に
表中記載の処理剤の０．２重量％水溶液を用い浸漬法
（乾燥前重量１０ｇ／ｍ2 塗布）によって化学皮膜処理
を施した。処理後図４中に示す乾燥温度で３０秒保持
し、乾燥及び加熱処理を施した。処理済アルミニウム箔
の片面に図４中に記載の接着剤を乾燥後重量２ｇ／ｍ2
となるようロール塗布した。図４中記載の温度で乾燥処
理（保持時間３０秒）した後、さらにこの塗布面に図４
中の熱接着性樹脂（厚み５０μｍ）を積層した。処理済
アルミニウム箔の他面には、ドライラミネート用接着剤
（東洋モートン株式会社製）乾燥後重量約４ｇ／ｍ2を
塗布後、１５μｍ厚みのナイロンフィルム（東洋紡績株
式会社製）を外面保護樹脂として貼り合わせた。以上の
工程による積層材の作製後は、必要に応じて図４中記載
の温度で最終の加熱処理（保持時間３０秒）を施し、電
池用包装材料を作製した。EXAMPLES AND COMPARATIVE EXAMPLES A 50% -thick raw aluminum foil (1N30: manufactured by Toyo Aluminum Co., Ltd.) is immersed in a 0.2% by weight aqueous solution of the treating agent shown in the table (weight before drying 10 g / m2). 2 coating). After the treatment, the substrate was kept at the drying temperature shown in FIG. 4 for 30 seconds, and subjected to drying and heat treatment. After drying the adhesive shown in FIG. 4 on one side of the treated aluminum foil, the weight was 2 g / m 2.
Roll coating was performed so that After a drying treatment (holding time: 30 seconds) at the temperature described in FIG.
The inside heat-adhesive resin (thickness: 50 μm) was laminated. On the other side of the treated aluminum foil, after drying the adhesive for dry lamination (manufactured by Toyo Morton Co., Ltd.), apply a weight of about 4 g / m 2, and apply a 15 μm thick nylon film (manufactured by Toyo Boseki Co., Ltd.) to the outer surface protective resin And pasted together. After the production of the laminated material by the above steps, a final heat treatment (retention time: 30 seconds) was performed at the temperature shown in FIG. 4 as necessary, to produce a battery packaging material.
【００２０】図４中に示す各包装材料を１５０×１５０
ｍｍに裁断し、その中心部に８０×８０×深さ５ｍｍの
凹部をプレス成形し容器とした。この凹部に下記溶媒と
電解質を３０ｍｌ注入し、同一構成の容器を蓋材として
１６０℃１秒間のヒートシール（四方シール）し、６０
℃（ドライ状態）および４０℃、湿度９０％にて７日間
放置後、開封し、積層体の内面の観察を行った。Each packaging material shown in FIG.
mm, and a recess having a size of 80 × 80 × 5 mm in depth was press-formed at the center thereof to obtain a container. 30 ml of the following solvent and electrolyte was injected into the recess, and the container having the same configuration was heat-sealed (four-side seal) at 160 ° C. for 1 second using a lid as a cover material.
After leaving it at 7 ° C. (dry state), 40 ° C. and 90% humidity for 7 days, it was opened and the inner surface of the laminate was observed.
【００２１】溶媒はジエチルカーボネート、エチレンカ
ーボネートを体積比率１：１で混合したものを使用し、
電解質（電解液）として前記溶媒に電解質６フッ化燐酸
リチウム（ＬｉＰＦ６）を１モル／リットル溶解したも
のを使用した。また、包装材料のラミネート強度を検査
した。即ちアルミニウム箔と熱接着性樹脂層（フィル
ム）間の剥離強度を前記放置（試験）の前後にＴ型剥離
試験（ＪＩＳ Ｋ６８５４を準用。ただし試験片は幅１
５ｍｍ、特に本明細書に記載以外の前処理は実施せ
ず。）により測定した。The solvent used is a mixture of diethyl carbonate and ethylene carbonate at a volume ratio of 1: 1.
As the electrolyte (electrolyte solution), a solution prepared by dissolving 1 mol / liter of electrolyte lithium lithium hexafluorophosphate (LiPF6) in the above solvent was used. In addition, the laminate strength of the packaging material was inspected. That is, the peel strength between the aluminum foil and the heat-adhesive resin layer (film) was determined before and after the standing (test) by a T-type peel test (JIS K 6854, where the test piece had a width of 1).
5 mm, especially without any pretreatment other than described herein. ).
【００２２】図４中の評価は、アルミニウム箔の腐食が
見られず、ラミネート強度の低下が３０％以下のものを
○とし、ラミネート強度の低下が３０％を超え５０％以
下のものを△とし、アルミニウムの一部が腐食（変色）
しているか、ラミネート強度の低下が５０％を超えるも
のを×とした。In the evaluation in FIG. 4, the case where no corrosion of the aluminum foil was observed and the decrease in lamination strength was 30% or less was evaluated as ○, and the case where the decrease in lamination strength exceeded 30% and 50% or less was evaluated as Δ. , Part of aluminum is corroded (discolored)
The sample was evaluated as “poor” if it had a decrease in laminate strength of more than 50%.
【００２３】なお、図４中、リン／クロム系とはリン酸
とクロム酸を重量比で１：１に混合したもの、クロム／
フッ酸系とはクロム酸とフッ酸を重量比で１：１に混合
したもの、酸変性ＰＰはポリエチレンと酸変性ポリプロ
ピレンとのランダム共重合樹脂（三井化学株式会社
製）、エポキシ／ＰＰは熱硬化型エポキシ樹脂と酸変性
ポリプロピレンとのブレンド品（固形分比２：１、東洋
アルミニウム株式会社にてブレンド）、ランダムＰＰは
ポリエチレンとポリプロピレンとのランダム共重合樹脂
（東セロ株式会社製）をそれぞれ示し、ホモＰＰは東セ
ロ株式会社製のホモポリプロピレンを用いた。In FIG. 4, the phosphorus / chromium system is a mixture of phosphoric acid and chromic acid at a weight ratio of 1: 1.
Hydrofluoric acid is a mixture of chromic acid and hydrofluoric acid at a weight ratio of 1: 1. Acid-modified PP is a random copolymer resin of polyethylene and acid-modified polypropylene (manufactured by Mitsui Chemicals, Inc.). Blend product of curable epoxy resin and acid-modified polypropylene (solid content ratio 2: 1, blended by Toyo Aluminum Co., Ltd.), random PP is a random copolymer resin of polyethylene and polypropylene (manufactured by Tocelo Co., Ltd.) The homo PP used was a homo polypropylene manufactured by Tosero Corporation.
【００２４】[0024]
【効果】この発明の電池包装材料用アルミニウム箔及び
電池包装材料は、特殊なフィルム等を使用することなく
簡単な処理で耐食性を向上させるとともに、初期状態に
近いラミネート強度を長期間維持することができ、寿命
の長い電池を提供することができる。またコストの点で
も従来の包装材料と大きく変わることはなく、特殊な設
備を要することなく簡便に製造することができる利点が
ある。The aluminum foil for a battery packaging material and the battery packaging material of the present invention can improve the corrosion resistance by a simple treatment without using a special film or the like, and can maintain the laminate strength close to the initial state for a long time. And a long-life battery can be provided. In addition, there is no significant difference in cost from conventional packaging materials, and there is an advantage that it can be easily manufactured without requiring special equipment.
【図１】この発明の電池包装材料用アルミニウム箔の一
例を示す断面図FIG. 1 is a sectional view showing an example of an aluminum foil for a battery packaging material of the present invention.
【図２】電池包装材料の一例を示す断面図FIG. 2 is a cross-sectional view illustrating an example of a battery packaging material.
【図３】電池包装材料の他の例を示す断面図FIG. 3 is a sectional view showing another example of a battery packaging material.
【図４】実施例及び比較例の積層構成及び試験結果を示
す表FIG. 4 is a table showing the lamination configurations and test results of Examples and Comparative Examples.
１ 包装材料用アルミニウム箔 １ａ 電池包装材料 ２ アルミニウム基材 ３ 化学処理皮膜 ４ 熱接着性樹脂 ５ 接着剤層 DESCRIPTION OF SYMBOLS 1 Aluminum foil for packaging materials 1a Battery packaging material 2 Aluminum base material 3 Chemical treatment film 4 Thermal adhesive resin 5 Adhesive layer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 米田 敦史 大阪市中央区久太郎町三丁目６番８号 東 洋アルミニウム株式会社内 (72)発明者 麻植 啓司 大阪市中央区久太郎町三丁目６番８号 東 洋アルミニウム株式会社内 Ｆターム(参考） 5H011 AA02 AA09 CC02 CC06 CC10 DD09 DD14 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Atsushi Yoneda 3-6-1-8 Kutaro-cho, Chuo-ku, Osaka-shi Inside Toyo Aluminum Co., Ltd. (72) Keiji Asaue 3-6--8 Kutaro-cho, Chuo-ku, Osaka-shi No. Toyo Aluminum Co., Ltd. F-term (reference) 5H011 AA02 AA09 CC02 CC06 CC10 DD09 DD14
Claims (4)
クロム酸、クロム酸塩、フッ酸、フッ酸塩から選ばれた
１種以上の溶液により処理した電池包装材料用アルミニ
ウム箔。1. A method according to claim 1, wherein at least one side comprises phosphoric acid, phosphate,
An aluminum foil for a battery packaging material treated with at least one solution selected from chromic acid, chromate, hydrofluoric acid, and hydrofluoric acid.
熱処理した電池包装材料用アルミニウム箔。2. An aluminum foil for a battery packaging material, wherein the aluminum foil according to claim 1 is further heat-treated.
箔の内容物に直接接触する面に、ポリエチレンとポリプ
ロピレンとのランダム共重合樹脂層を積層した電池包装
材料。3. A battery packaging material in which a random copolymer resin layer of polyethylene and polypropylene is laminated on a surface of the aluminum foil according to claim 1 which directly contacts the contents.
とポリエチレンとポリプロピレンとのランダム共重合樹
脂層との接着に、ポリエチレンとランダム共重合させた
酸変性ポリプロピレン樹脂、または酸変性ポリプロピレ
ンと熱硬化型のエポキシ樹脂とのブレンド樹脂のいずれ
か１種以上を使用した電池包装材料。4. An acid-modified polypropylene resin obtained by random copolymerization with polyethylene, or an acid-modified polypropylene resin and a thermosetting resin for bonding the aluminum foil according to claim 1 or 2 to a random copolymer resin layer of polyethylene and polypropylene. Battery packaging material using at least one of a blend resin with an epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27283399A JP3594849B2 (en) | 1999-06-10 | 1999-09-27 | Battery packaging material |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11-163477 | 1999-06-10 | ||
| JP16347799 | 1999-06-10 | ||
| JP27283399A JP3594849B2 (en) | 1999-06-10 | 1999-09-27 | Battery packaging material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001057181A true JP2001057181A (en) | 2001-02-27 |
| JP3594849B2 JP3594849B2 (en) | 2004-12-02 |
Family
ID=26488903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27283399A Expired - Fee Related JP3594849B2 (en) | 1999-06-10 | 1999-09-27 | Battery packaging material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3594849B2 (en) |
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-
1999
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|---|---|---|---|---|
| JP2000340187A (en) * | 1999-05-26 | 2000-12-08 | Dainippon Printing Co Ltd | Packaging material for polymer battery |
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