JP2002113412A - Coating method - Google Patents
Coating methodInfo
- Publication number
- JP2002113412A JP2002113412A JP2000310757A JP2000310757A JP2002113412A JP 2002113412 A JP2002113412 A JP 2002113412A JP 2000310757 A JP2000310757 A JP 2000310757A JP 2000310757 A JP2000310757 A JP 2000310757A JP 2002113412 A JP2002113412 A JP 2002113412A
- Authority
- JP
- Japan
- Prior art keywords
- coating
- slurry
- belt
- shaped member
- head
- 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.)
- Withdrawn
Links
Landscapes
- Coating Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、帯状の厚みの薄い
部材の表面に連続的に一様な厚さの塗工層を形成する塗
工装置に関し、特に連続的に走行する帯状の集電体上に
液状の活物質を塗工して均一な厚さの活物質層を形成に
好適な塗工方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating apparatus for continuously forming a coating layer having a uniform thickness on the surface of a strip-shaped thin member, and more particularly to a strip-shaped current collector running continuously. The present invention relates to a coating method suitable for applying a liquid active material on a body to form an active material layer having a uniform thickness.
【０００２】[0002]
【従来の技術】小型の電子機器用の電源として用いられ
る電池として小型で大容量であるリチウムイオン二次電
池等の非水電解液電池が用いられている。リチウムイオ
ン二次電池は、一般には、アルミニウム箔からなる帯状
の正極集電体に正極活物質を塗工した正極、および銅箔
からなる帯状の負極集電体に負極活物質を塗工した負極
をセパレータを介して積層したものを多数回巻回して作
製した電池要素を電池缶に収納し、電解液を注入した後
に封口することによって製造している。帯状の集電体へ
の電極活物質の塗工には、各種の方法が採用されている
が、連続走行する帯状の部材へ電極活物質を液体中に分
散したスラリーを塗工ヘッドから塗工して均一な厚さの
活物質層を形成させることが行われている。2. Description of the Related Art As a battery used as a power source for a small electronic device, a nonaqueous electrolyte battery such as a lithium ion secondary battery having a small size and a large capacity is used. Lithium ion secondary batteries generally have a positive electrode in which a positive electrode active material is coated on a strip-shaped positive electrode current collector made of aluminum foil, and a negative electrode in which a negative electrode active material is coated on a strip-shaped negative electrode current collector made of copper foil. The battery element is produced by winding a number of turns of a battery element with a separator interposed therebetween, storing the battery element in a battery can, injecting an electrolytic solution, and sealing the battery. Various methods have been adopted for applying the electrode active material to the belt-shaped current collector, but a slurry in which the electrode active material is dispersed in a liquid is applied to a continuously running belt-shaped member from a coating head. In this case, an active material layer having a uniform thickness is formed.
【０００３】図２は、従来の塗工装置を用いた塗工方法
を説明する図であり、図２（Ａ）は、乾燥装置を含む全
体図を示し、図２（Ｂ）は、塗工装置の塗工部の断面図
を示し、図２（Ｃ）は、図２（Ｂ）におけるＡの部分の
拡大図である。塗工装置１において、送り出しロール２
から送り出されて走行する帯状部材３に、バックアップ
ロール４上において、塗工ヘッド５からスラリーが供給
されて帯状部材３の表面に所望の厚さの塗膜６が形成さ
れ、乾燥装置７において熱風、輻射熱の少なくともいず
れか一方によって加熱されて、スラリー中の揮発性溶剤
は揮散して乾燥されて、巻き取りロール８に巻き取られ
る。このような塗工装置を用いて帯状部材３上に、塗工
ヘッド５から一定の条件でスラリーが供給された場合で
あっても塗膜６の両端部分には、基材との表面張力の違
いによって盛り上がり部分９が形成され、塗膜の乾燥後
においても両端部の盛り上がり部は解消しない。形成さ
れた盛り上がり部に対して、乾燥前に空気流を照射して
盛り上がりを変形させる方法、あるいはブレード等によ
って両端部の盛り上がり部を成型する方法等も考えられ
るが、盛り上がり部を多少小さくすることが可能である
としても、両端部を一様な厚みとすることは困難であっ
た。FIG. 2 is a view for explaining a coating method using a conventional coating apparatus. FIG. 2 (A) shows an overall view including a drying apparatus, and FIG. 2 (B) shows a coating method. FIG. 2C is a cross-sectional view of a coating portion of the apparatus, and FIG. 2C is an enlarged view of a portion A in FIG. 2B. In the coating apparatus 1, the delivery roll 2
The slurry is supplied from the coating head 5 on the backup roll 4 to the belt-like member 3 which is sent out from and travels, and a coating film 6 having a desired thickness is formed on the surface of the belt-like member 3. The slurry is heated by at least one of radiant heat, the volatile solvent in the slurry is volatilized, dried, and taken up by the take-up roll 8. Even when the slurry is supplied from the coating head 5 to the belt-shaped member 3 under a certain condition by using such a coating apparatus, the both ends of the coating film 6 have the surface tension of the base material. The raised portion 9 is formed due to the difference, and the raised portions at both ends are not eliminated even after the coating film is dried. It is also conceivable to irradiate the air flow before drying on the formed bulge to deform the bulge, or to mold the bulge at both ends with a blade or the like. However, it was difficult to make both end portions uniform in thickness.
【０００４】両端部に盛り上がり部が形成された帯状体
を巻回しようとすると、両端部の塗膜の厚みが厚いため
に、両端部の巻き取り径が大きくなり、帯状体の端部が
切れて途中で巻き取りができなくなることがあった。ま
た、塗膜の両端部の盛り上がった部分は、製品には使用
することができないので、途中の工程で両端部を切断す
る必要が生じ、予め両端部の切断を見越して塗膜を製造
するために材料に無駄が生じるという問題点もあった。[0004] When winding a belt-shaped body having raised portions at both ends, the thickness of the coating film at both ends is large, so that the winding diameter at both ends is large and the end of the band is cut off. In some cases, winding could not be completed. Also, since the raised portions of both ends of the coating film cannot be used for products, it is necessary to cut both ends in the middle of the process, and in order to manufacture the coating film in anticipation of cutting both ends in advance In addition, there is also a problem that the material is wasted.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、連続して走
行する帯状の部材に一様な厚さの塗膜を形成する塗工方
法において、帯状体の幅方向の端部の近傍に盛り上がり
部がなく、一様な厚みの塗膜を得ることが可能な塗工方
法を提供することを課題とするものであり、電池の活物
質の塗工に適用した場合には、厚みが均一な活物質層の
製造が可能な塗工方法を提供することを課題とするもの
である。SUMMARY OF THE INVENTION The present invention relates to a coating method for forming a coating film having a uniform thickness on a continuously running belt-like member. It is an object of the present invention to provide a coating method capable of obtaining a coating film having a uniform thickness without parts, and when applied to the coating of an active material of a battery, the thickness is uniform. It is an object of the present invention to provide a coating method capable of producing an active material layer.
【０００６】[0006]
【課題を解決するための手段】本発明は、走行する帯状
部材に塗工ヘッドによって塗膜を形成する塗工方法にお
いて、帯状部材の幅方向における塗工ヘッドの両端部に
対向する帯状部材の塗工部の表面におけるスラリーの濡
れ広がり性を、中央部のスラリーの濡れ広がり性に比べ
て大きくなるように表面処理した帯状部材上に、塗工ヘ
ッドから塗工する塗工方法によって解決することができ
る。また、濡れ広がり性を帯状部材の幅方向における塗
工ヘッドの両端部に対向する帯状部材の塗工部の表面に
おけるスラリーに対する表面張力を、中央部のスラリー
に対する表面張力に比べて大きくなるように表面処理し
た後に、塗工ヘッドから塗工する塗工方法によって解決
することができる。帯状部材の幅方向における塗工ヘッ
ドの両端部に対向する塗工部の表面にスラリーよりも帯
状部材との接触角が小さな液体を塗工する前記の塗工方
法である。帯状部材の幅方向における塗工ヘッドの両端
部に対向する塗工部の表面にスラリーの調製に用いた溶
剤を塗工し、その後にスラリーを塗工することによって
両端部の濡れ広がり性を大きくした前記の塗工方法であ
る。また、帯状部材の幅方向における塗工ヘッドの両端
部に対向する塗工部の表面粗度を、塗工ヘッドの中央部
に対向する塗工部の表面粗度に比べて粗くしてスラリー
との表面張力を中央部に比べて大きくした前記の塗工方
法である。帯状部材が電池の電極の集電体であり、集電
体上に電池の活物質を塗工する前記の塗工方法である。According to the present invention, there is provided a coating method for forming a coating film on a traveling belt-shaped member by a coating head, wherein the belt-shaped member opposing both ends of the coating head in the width direction of the belt-shaped member is provided. Solving the wet-spreading property of the slurry on the surface of the coating section by a coating method of coating from a coating head on a band-shaped member surface-treated so as to be larger than the wettable-spreading property of the slurry in the central portion. Can be. Further, the surface tension of the slurry on the surface of the coating portion of the band member facing the both ends of the coating head in the width direction of the band member in the width direction of the band member is made larger than the surface tension of the slurry in the central portion. The problem can be solved by a coating method in which coating is performed from a coating head after the surface treatment. In the above-mentioned coating method, a liquid having a smaller contact angle with the belt-shaped member than the slurry is applied to the surface of the coating portion facing both ends of the coating head in the width direction of the belt-shaped member. The solvent used for preparing the slurry is applied to the surface of the coating section opposite to both ends of the coating head in the width direction of the belt-shaped member, and then the slurry is applied to increase the wettability of both ends. This is the above-mentioned coating method. Further, the surface roughness of the coating portion facing the both ends of the coating head in the width direction of the belt-shaped member is made coarser than the surface roughness of the coating portion facing the center portion of the coating head, and the slurry is formed. In the above-mentioned coating method, the surface tension is larger than that of the central part. In the above-mentioned coating method, the belt-shaped member is a current collector of an electrode of the battery, and the active material of the battery is coated on the current collector.
【０００７】[0007]
【発明の実施の形態】本発明は、帯状部材に塗工ヘッド
によって塗膜を形成する際に、帯状部材の幅方向におけ
る塗工ヘッドの両端部に対向する帯状部材の塗工部の表
面のスラリーの濡れ広がり性を大きくすることによっ
て、両端部での表面張力による盛り上がりを小さくする
ことが可能であることを見出したものである。帯状部材
上へのスラリーの濡れ広がり性は、スラリーの表面張
力、帯状部材の表面張力、スラリーの表面張力と帯状部
材の表面張力との差等によって左右される。基材の表面
張力が大きな部分ほど濡れ広がり性を大きくすることが
可能となる。なお、濡れ広がり性は、帯状基材上にスラ
リーを滴下した場合のスラリーの周囲への広がりの大き
さによって評価をすることができ、濡れ広がり性が大き
いとは、一定の量を滴下あるいは塗工した場合の周囲へ
の広がる面積が大きいことを意味し、濡れ広がり性が小
さいとはその逆である。DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the present invention, when a coating film is formed on a strip-shaped member by a coating head, the surface of the coated portion of the strip-shaped member opposed to both ends of the coating head in the width direction of the strip-shaped member. It has been found that the swelling due to surface tension at both ends can be reduced by increasing the wet spreadability of the slurry. The wet spreadability of the slurry on the belt-shaped member depends on the surface tension of the slurry, the surface tension of the belt-shaped member, the difference between the surface tension of the slurry and the surface tension of the belt-shaped member, and the like. The larger the surface tension of the substrate, the greater the wet spreadability. It should be noted that the wet spreadability can be evaluated based on the extent of the spread of the slurry to the periphery when the slurry is dropped on the belt-shaped base material. It means that the area that spreads to the surroundings when the work is performed is large, and the opposite is the case that the wettability is small.
【０００８】基材の表面の濡れ広がり性の調整は、基材
の表面張力を大きくする物質を塗工する方法、あるいは
表面の粗度を中央部よりも大きく、すなわち表面を粗面
化する方法によって行うことができる。粗面化部の形成
方法には、基材の表面の所定の領域を減圧下で、酸素プ
ラズマ、アルゴンプラズマ、反応性に富んだ原子の照射
等の方法によって凹凸を形成する方法を挙げることがで
きる。また、帯状基材を圧延によって作製する際に、表
面に所望の凹凸を有する圧延ロールを用いることによっ
て基材の表面の所定の領域に凹凸を形成することができ
る。また、サンドブラストのような砥粒を噴射する方
法、帯状部材が塗工ヘッドに供給される前に凹凸を有す
るロール、砥粒等からなる研削ロール等を表面に接触し
て粗面化を行う方法等で行っても良い。The wettability of the surface of the substrate is adjusted by applying a substance which increases the surface tension of the substrate, or by increasing the surface roughness to a value greater than that at the center, ie, by roughening the surface. Can be done by Examples of the method of forming the roughened portion include a method of forming irregularities by a method of irradiating a predetermined region of the surface of the base material under reduced pressure with oxygen plasma, argon plasma, or irradiation of reactive atoms. it can. In addition, when a strip-shaped substrate is produced by rolling, by using a rolling roll having desired irregularities on the surface, irregularities can be formed in a predetermined region on the surface of the substrate. Also, a method of injecting abrasive grains such as sand blast, a method of roughening the surface by contacting the surface with a roll having irregularities, a grinding roll made of abrasive grains or the like before the belt-shaped member is supplied to the coating head. Etc.
【０００９】また、濡れ広がり性は、表面張力の違いを
形成することなく、固体状物質を分散してスラリーを調
製した際に使用した分散剤として使用した液体を、帯状
部材の被塗工面に対して塗工してもよい。分散剤が乾燥
する前に分散剤の塗工面にスラリーを塗工した場合に
は、塗工面において既に塗工された分散剤面を速やかに
広がるために、濡れ広がり性を高めることができる。分
散剤の塗工は、帯状部材が塗工ヘッドに供給される直前
に、分散剤を浸漬した塗工ロールによる塗工、あるいは
噴霧等の方法によって塗工することができる。噴霧によ
る場合には、塗工部に液滴が形成されずに薄い被膜が形
成させる程度とすることが好ましい。また、分散剤を塗
布する方法では、塗膜にスラリーの形成に使用した物質
以外の異物が混入するおそれがないので、品質の安定し
た塗膜を形成することができる。In addition, the wet-spreading property is determined by applying a liquid used as a dispersant used when a slurry is prepared by dispersing a solid substance to a surface to be coated of a belt-shaped member without forming a difference in surface tension. On the other hand, you may apply. In the case where the slurry is applied to the dispersant-coated surface before the dispersant is dried, the spreadability of the already-applied dispersant on the coated surface can be increased, so that the wet-spreadability can be improved. Immediately before the dispersant is supplied to the coating head, the dispersant can be applied by a method using a coating roll dipped with the dispersant or by spraying. In the case of spraying, it is preferable that a thin film is formed without forming droplets on the coating portion. Further, in the method of applying a dispersant, since there is no possibility that foreign matter other than the substance used for forming the slurry is mixed into the coating film, a coating film having stable quality can be formed.
【００１０】以下に図面を参照して本発明を説明する。
図１は、本発明の塗工方法を実施するための塗工装置を
説明する図であり、図１（Ａ）は全体を示す断面図であ
り、図１（Ｂ）は、塗膜を形成した帯状基材を説明する
平面図であり、図１（Ｃ）は塗膜の端部を拡大した断面
図である。本発明の塗工方法に用いる塗工装置１は、送
り出しロール２から送り出された帯状部材３の幅方向の
端部の塗工ヘッドに対向する面に対して、液体塗工手段
１０によって液体塗工部１１が形成される。液体として
は、帯状基材の表面の表面張力を部分的に高める作用の
ある物質、あるいはスラリーの調製に用いた分散剤が使
用される。液体塗工部１１にスラリーが塗工ヘッドから
塗工されるとスラリーは液体塗工部１１を濡れ広がり、
塗膜の端部において表面張力による盛り上がりを小さく
するように作用し、その結果、塗膜の端部における盛り
上がり部の形成を防止し、盛り上がり部のない一様な厚
みの塗膜を形成することが可能となる。図１に示した塗
工装置において、液体塗工手段に代えて、表面に凹凸を
有するロール、あるいは研削ロールを装着することによ
って、表面粗度を変えることによって濡れ広がり性を変
化させても良い。The present invention will be described below with reference to the drawings.
FIG. 1 is a view for explaining a coating apparatus for carrying out the coating method of the present invention. FIG. 1 (A) is a cross-sectional view showing the whole, and FIG. FIG. 1 (C) is a cross-sectional view showing an enlarged end portion of a coating film. The coating apparatus 1 used in the coating method of the present invention uses a liquid coating means 10 to apply a liquid coating means 10 to a surface facing an application head at an end in the width direction of the belt-shaped member 3 fed from the feed roll 2. The processing portion 11 is formed. As the liquid, a substance having a function of partially increasing the surface tension of the surface of the belt-shaped substrate, or a dispersant used for preparing a slurry is used. When the slurry is applied to the liquid application unit 11 from the application head, the slurry wets and spreads on the liquid application unit 11,
Acts to reduce the swelling due to surface tension at the edge of the coating, thereby preventing the formation of swelling at the end of the coating and forming a uniform thickness coating without swelling Becomes possible. In the coating apparatus shown in FIG. 1, instead of the liquid coating means, a roll having irregularities on the surface or a grinding roll may be attached to change the surface roughness to change the wet spreadability. .
【００１１】また、リチウムイオン二次電池の正極電極
および負極電極の製造の場合を例に挙げて説明すると、
正極電極は帯状のアルミニウム箔に、ＬｉxＭＯ2（ただ
しＭは、少なくとも１種の遷移金属を表す。）である複
合酸化物、例えば、ＬｉxＣｏＯ2、ＬｉxＮｉＯ2、Ｌｉ
xＭｎ2Ｏ4、ＬｉxＭｎＯ3、ＬｉxＮｉyＣｏ(1-y)Ｏ2な
どを 、カーボンブラック等の導電性物質、ポリフッ化
ビニリデン（ＰＶＤＦ）等の結着剤をＮ−メチル−２−
ピロリドン（ＮＭＰ）等の溶剤とを分散混練して調製し
た正極塗料の塗工に先だって、スラリーの分散に使用し
たＮ−メチル−２−ピロリドン（ＮＭＰ）等の溶剤が帯
状部材上へ塗工される。次いで、塗工ヘッドによってス
ラリーが塗工されたのちに、直ちに乾燥をされて巻き取
られる。巻き取りの際には、塗膜の端部の厚みも均一で
あるので、端部が大きく膨らんで切れることもない。片
面に塗膜の形成が終わったものは乾燥後に反対面も同様
に塗工し、両面が塗工される。また、本発明の塗工方法
によれば、厚みが不均一である両端部を切り落とす必要
もない。[0011] The case of manufacturing a positive electrode and a negative electrode of a lithium ion secondary battery will be described as an example.
The positive electrode is formed on a strip-shaped aluminum foil by using a composite oxide of Li x MO 2 (where M represents at least one transition metal), for example, Li x CoO 2 , Li x NiO 2 , and Li.
x Mn 2 O 4 , Li x MnO 3 , Li x Ni y Co (1-y ) O 2 , a conductive material such as carbon black, and a binder such as polyvinylidene fluoride (PVDF) with N-methyl- 2-
Prior to coating the positive electrode paint prepared by dispersing and kneading a solvent such as pyrrolidone (NMP), a solvent such as N-methyl-2-pyrrolidone (NMP) used for dispersing the slurry is applied onto the belt-shaped member. You. Next, immediately after the slurry is applied by the coating head, the slurry is dried and wound up. At the time of winding, since the thickness of the end portion of the coating film is also uniform, the end portion does not swell greatly and does not break. After the formation of the coating film on one side, the opposite side is similarly coated after drying, and both sides are coated. Further, according to the coating method of the present invention, it is not necessary to cut off both ends having uneven thickness.
【００１２】負極電極は、帯状の銅箔等の表面に、リチ
ウムをドープ及び脱ドープ可能な、熱分解炭素類、ピッ
チコークス、ニードルコークス、石油コークスなどのコ
ークス類、グラファイト類、ガラス状炭素類、フェノー
ル樹脂、フラン樹脂などを焼成した有機高分子化合物焼
成体、炭素繊維、活性炭などの炭素質材料、ポリアセチ
レン、ポリピロール等の導電性高分子材料等をカーボン
ブラックなどの導電性物質、ポリフッ化ビニリデン（Ｐ
ＶＤＦ）等の結着剤をＮ−メチル−２−ピロリドン（Ｎ
ＭＰ）等の溶剤とを分散混練した調製した負極塗工液の
塗工に先だって、スラリーの分散に使用したＮ−メチル
−２−ピロリドン（ＮＭＰ）等の溶剤が帯状部材上へ塗
工される。次いで、塗工ヘッドによってスラリーが塗工
されたのちに、直ちに乾燥をされて巻き取られる。片面
の塗工が終わったものは乾燥後に反対面も同様に塗工
し、両面を塗工される。なお、負極電極にあっては、巻
回して電池要素を作製した場合に片面が正極活物質層に
対向しない部分にあっては、片面のみに負極活物質層を
形成しても良い。The negative electrode is made of pyrolytic carbon, pitch coke, needle coke, coke such as petroleum coke, graphites, glassy carbons, which can be doped and dedoped with lithium on the surface of a strip-shaped copper foil or the like. Baked organic polymer compounds such as phenolic resin, furan resin, etc., carbonaceous materials such as carbon fiber and activated carbon, conductive polymer materials such as polyacetylene and polypyrrole, conductive materials such as carbon black, polyvinylidene fluoride (P
VDF) and the like as N-methyl-2-pyrrolidone (N
Prior to the application of the prepared negative electrode coating solution prepared by dispersing and kneading a solvent such as MP), a solvent such as N-methyl-2-pyrrolidone (NMP) used for dispersing the slurry is applied onto the belt-shaped member. . Next, immediately after the slurry is applied by the coating head, the slurry is dried and wound up. After the coating on one side is completed, the opposite side is coated in the same manner after drying, and both sides are coated. In the case of the negative electrode, when the battery element is wound and one side is not opposed to the positive electrode active material layer, the negative electrode active material layer may be formed only on one side.
【００１３】このようにして得られた正極電極、負極電
極は、電極を所定の厚みに圧縮して圧縮した後に、裁断
装置によって電極を所定の形状に裁断し、導電タブを接
合した後に、セパレータを介して積層したものを巻回し
電池要素を作製し、電池缶に収納して、非水電解液を注
入した後に、外部接続端子、電池内圧の上昇によって圧
力を開放する安全弁、電池温度の上昇により電気抵抗の
増大で電流を遮断するＰＴＣ素子等を備えた蓋体を取り
付けて封口することによって密閉型電池を製造する。The positive electrode and the negative electrode thus obtained are compressed to a predetermined thickness, compressed, cut into a predetermined shape by a cutting device, joined to a conductive tab, and then separated into separators. A battery element is manufactured by winding the stacked components through a battery pack, housed in a battery can, injected with a non-aqueous electrolyte, and then connected to an external connection terminal, a safety valve that releases pressure by increasing the internal pressure of the battery, and an increase in battery temperature. A sealed battery is manufactured by attaching and sealing a lid provided with a PTC element or the like that interrupts current by increasing electric resistance.
【００１４】[0014]
【実施例】以下に本発明の実施例を示し、本発明を説明
する。 実施例１ 厚さ２０μｍの帯状のアルミニウム箔に、アルミニウム
箔の幅方向に塗工幅を５０５ｍｍと設定し、Ｎ−メチル
−２−ピロリドンを霧状に噴霧し、塗工幅の両端部から
それぞれ１０ｍｍの幅に被膜を作るように薄く塗工し
た。次いで、Ｎ−メチル−２−ピロリドンが乾燥する前
に正極電極用の材料である、リチウムマンガン酸化合
物：カーボンブラック：ポリフッ化ビニリデン：Ｎ−メ
チル−２−ピロリドン＝５８：９：３：３０（重量比）
を含有する正極活物質層形成用スラリーを塗工した。次
いで、乾燥炉において乾燥を行った後に、塗膜の厚みを
測定した。厚みは１５３μｍであり、端部から１０ｍｍ
の部分はなだらかに厚みが変化をしたものであって、大
きな盛り上がりは存在しなかった。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below by showing embodiments of the present invention. Example 1 A band-shaped aluminum foil having a thickness of 20 μm was coated with a coating width of 505 mm in the width direction of the aluminum foil, and N-methyl-2-pyrrolidone was sprayed in the form of a mist. The coating was applied thinly so as to form a film with a width of 10 mm. Next, before N-methyl-2-pyrrolidone is dried, a material for the positive electrode, lithium manganate compound: carbon black: polyvinylidene fluoride: N-methyl-2-pyrrolidone = 58: 9: 3: 30 ( Weight ratio)
Was coated with a slurry for forming a positive electrode active material layer. Next, after drying in a drying furnace, the thickness of the coating film was measured. The thickness is 153 μm, 10 mm from the end
The portion with a gradual change in thickness was not present.
【００１５】比較例１ スラリーの塗工前にＮ−メチル−２−ピロリドンを塗工
しなかった点を除き、実施例１と同様にして塗膜を作製
した。得られた塗膜の厚みは、１５３μｍあり、端部か
ら１０ｍｍの部分は、１６０μｍの盛り上がりがあっ
た。Comparative Example 1 A coating film was prepared in the same manner as in Example 1, except that N-methyl-2-pyrrolidone was not applied before applying the slurry. The thickness of the obtained coating film was 153 μm, and the portion 10 mm from the end had a rise of 160 μm.
【００１６】[0016]
【発明の効果】本発明の塗工方法によれば、走行する帯
状部材上に、帯状部材の幅方向の端部に塗膜の盛り上が
り部を生じさせることがなく、厚みの不均一を防止する
ことができるので、電池活物質の塗膜を形成した場合に
は、電極製造時に巻き取る際に切断したり、あるいは電
池電極の製造時に端部の厚みの厚い部分を廃棄すること
なく電池を製造することができる。According to the coating method of the present invention, the unevenness of the thickness can be prevented without causing a raised portion of the coating film on the running belt-like member at the widthwise end of the belt-like member. When a battery active material coating film is formed, the battery can be manufactured without cutting it when winding it up at the time of manufacturing the electrode, or without discarding the thick end at the time of manufacturing the battery electrode. can do.
【図１】図１は、本発明の塗工方法を実施するための塗
工装置を説明する図である。FIG. 1 is a diagram illustrating a coating apparatus for performing a coating method according to the present invention.
【図２】図２は、従来の塗工装置を用いた塗工方法を説
明する図である。FIG. 2 is a diagram illustrating a coating method using a conventional coating device.
１…塗工装置、２…送り出しロール、３…帯状部材、４
…バックアップロール、５…塗工ヘッド、６…塗膜、７
…乾燥装置、８…巻き取りロール、９…盛り上がり部、
１０…液体塗工手段、１１…液体塗工部DESCRIPTION OF SYMBOLS 1 ... Coating apparatus, 2 ... Delivery roll, 3 ... Band-shaped member, 4
... backup roll, 5 ... coating head, 6 ... coating film, 7
... drying device, 8 ... take-up roll, 9 ... swelling part,
10: liquid coating means, 11: liquid coating unit
Claims (2)
塗膜を形成する塗工方法において、帯状部材の幅方向に
おける塗工ヘッドの両端部に対向する帯状部材の塗工部
の表面におけるスラリーの濡れ広がり性を、中央部のス
ラリーの濡れ広がり性に比べて大きくなるように表面処
理した帯状部材上に、塗工ヘッドから塗工することを特
徴する塗工方法。1. A coating method for forming a coating film on a traveling belt-shaped member by a coating head, wherein a slurry on a surface of a coating portion of the belt-shaped member opposed to both ends of the coating head in a width direction of the belt-shaped member. A coating method, wherein a coating head is applied on a belt-shaped member surface-treated so that the wet spreadability is greater than the wet spreadability of the slurry at the center.
両端部に対向する塗工部の表面にスラリーの調製に用い
た溶剤を塗工し、その後にスラリーを塗工することによ
って両端部の濡れ広がり性を大きくしたことを特徴とす
る請求項１記載の塗工方法。2. A solvent used for preparing a slurry is applied to a surface of a coating portion opposite to both ends of a coating head in a width direction of the belt-shaped member, and then the slurry is coated to form a coating at both ends. 2. The coating method according to claim 1, wherein the wet spreadability is increased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000310757A JP2002113412A (en) | 2000-10-11 | 2000-10-11 | Coating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000310757A JP2002113412A (en) | 2000-10-11 | 2000-10-11 | Coating method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002113412A true JP2002113412A (en) | 2002-04-16 |
Family
ID=18790652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000310757A Withdrawn JP2002113412A (en) | 2000-10-11 | 2000-10-11 | Coating method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002113412A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011077545A (en) * | 2007-07-09 | 2011-04-14 | Sumitomo Bakelite Co Ltd | Resin sheet for circuit board, and method of manufacturing the same |
| JP6405015B1 (en) * | 2017-09-22 | 2018-10-17 | デクセリアルズ株式会社 | Active energy ray-curable resin composition, laminate, method for producing the same, and article |
| JP2019059234A (en) * | 2018-09-12 | 2019-04-18 | デクセリアルズ株式会社 | Active energy ray curable resin composition, laminate, method for manufacturing the same, and article |
-
2000
- 2000-10-11 JP JP2000310757A patent/JP2002113412A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011077545A (en) * | 2007-07-09 | 2011-04-14 | Sumitomo Bakelite Co Ltd | Resin sheet for circuit board, and method of manufacturing the same |
| JP2011176362A (en) * | 2007-07-09 | 2011-09-08 | Sumitomo Bakelite Co Ltd | Resin sheet for circuit board and method for manufacturing the same |
| JP2011249845A (en) * | 2007-07-09 | 2011-12-08 | Sumitomo Bakelite Co Ltd | Resin sheet for circuit board and method for manufacturing the same |
| US8535782B2 (en) | 2007-07-09 | 2013-09-17 | Sumitomo Bakelite Co., Ltd. | Resin sheet for circuit board and production process therefor |
| JP6405015B1 (en) * | 2017-09-22 | 2018-10-17 | デクセリアルズ株式会社 | Active energy ray-curable resin composition, laminate, method for producing the same, and article |
| JP2019055555A (en) * | 2017-09-22 | 2019-04-11 | デクセリアルズ株式会社 | Active energy ray curable resin composition, laminate, method for manufacturing the same, and article |
| JP2019059234A (en) * | 2018-09-12 | 2019-04-18 | デクセリアルズ株式会社 | Active energy ray curable resin composition, laminate, method for manufacturing the same, and article |
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