JPH0550023A - Method for drying band-shaped material - Google Patents
Method for drying band-shaped materialInfo
- Publication number
- JPH0550023A JPH0550023A JP23370591A JP23370591A JPH0550023A JP H0550023 A JPH0550023 A JP H0550023A JP 23370591 A JP23370591 A JP 23370591A JP 23370591 A JP23370591 A JP 23370591A JP H0550023 A JPH0550023 A JP H0550023A
- Authority
- JP
- Japan
- Prior art keywords
- air
- drying
- hygrometers
- ducts
- coating layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、磁気記録媒体その他の
記録材料等の乾燥すべき塗布層を形成した帯状物等から
成る長尺の被乾燥体の乾燥法に関し、特に定期乗車券、
プリペイドカード、感熱磁気回数券等の基材表面に形成
した記録層及びバリヤー層等の水系塗布層の化学的特性
及び物理的特性を調整して、塗布層の安定した乾燥条件
を得るための乾燥法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for drying a long object to be dried, such as a band-shaped material having a coating layer to be dried, such as a magnetic recording medium and other recording materials.
Drying to obtain stable drying conditions for the coating layer by adjusting the chemical and physical properties of the water-based coating layer such as the recording layer and barrier layer formed on the surface of the base material such as prepaid cards and thermo-sensitive magnetic coupons. Concerning the law.
【０００２】[0002]
【従来の技術】塗工紙等の製造において、帯状物から成
る被乾燥体を乾燥する場合、従来は外気（空気）を直接
熱交換器により加熱し、送風機によりその熱風を塗布層
面に吹き付けて溶媒を蒸発させるのが一般的であった。
そして、乾燥条件の制御は、吹き付ける風の温度と風量
のみで行なっていた。帯状基材の両面に塗布層を形成し
て、表面及び裏面に吹き付ける風量を制御して乾燥する
ものとしては特開昭５７−６３１６３号公報があり、被
乾燥体に吹き付ける風の温度、露点、伝熱面積等を帯状
物の表面と裏面とで別個に設定して、表裏の乾燥終点が
実質的に同一になるようにするものとして特開昭５９−
１８９９７１号公報があり、乾燥帯域をいくつかのゾー
ンに区分しておいて、各ゾーンに共通の熱風発生装置の
温度を設定温度に制御すると共に熱風の量を各ゾーン毎
に調節して、各ゾーンの内部温度を制御するものとして
実開昭６１−６６７９２号公報がある。2. Description of the Related Art In the manufacture of coated paper and the like, when drying a material to be dried consisting of strips, conventionally, the outside air (air) is directly heated by a heat exchanger, and the hot air is blown to the coating layer surface by a blower. It was common to evaporate the solvent.
Then, the control of the drying condition is performed only by the temperature and the air volume of the blown air. Japanese Patent Application Laid-Open No. 57-63163 discloses a method in which a coating layer is formed on both sides of a strip-shaped substrate and the amount of air blown on the front surface and the back surface is controlled to dry the temperature. Japanese Laid-Open Patent Publication No. 59-59-1999, in which the heat transfer area and the like are set separately for the front surface and the back surface of the strip so that the drying end points on the front and back are substantially the same.
189971 discloses that the drying zone is divided into several zones, the temperature of the hot air generator common to each zone is controlled to a set temperature, and the amount of hot air is adjusted for each zone. There is Japanese Utility Model Laid-Open No. 61-66792 for controlling the internal temperature of the zone.
【０００３】[0003]
【発明が解決しようとする課題】しかし、かかる乾燥法
においては、特に、一定乾燥条件下で水系塗布層を乾燥
する場合、熱風湿度（外気湿度と温度）の変化により溶
媒たる水の蒸発速度が影響を受け、塗膜特性はもとよ
り、乾燥終点が異なるので、製品の化学的特性及び物理
的特性が不安定な乾燥条件により支配されるという問題
があった。However, in such a drying method, particularly when the water-based coating layer is dried under a constant drying condition, the evaporation rate of water as a solvent is changed by the change in hot air humidity (outside air humidity and temperature). Since the end point of drying is affected by the influence of the coating film, the chemical and physical properties of the product are controlled by unstable drying conditions.
【０００４】[0004]
【課題を解決するための手段】本発明は、上記の問題を
解決するためになされたものであって、熱風湿度に関係
なく記録特性の劣化及び乾燥終了時の塗布層の乾燥不良
等の乾燥状態に起因するトラブルが生じない長尺体の乾
燥法を提供することにある。すなわち、本発明は、乾燥
帯域を複数の工程に分割して、それぞれの乾燥用加熱空
気の温度、湿度等を計測すると共に、排気用空気の温
度、湿度等を計測して、その結果に基づいて水系塗布層
から蒸発する湿度を一定に保つように制御することによ
り、被乾燥体からの水分の蒸発量の変動を抑制して、乾
燥状態が一定になるように制御するものである。The present invention has been made in order to solve the above-mentioned problems, and it is possible to dry the coating layer regardless of hot air humidity, such as deterioration of recording characteristics and poor drying of the coating layer at the end of drying. It is to provide a method for drying a long body in which troubles due to the state do not occur. That is, the present invention divides the drying zone into a plurality of steps, measures the temperature, the humidity, etc. of each heating air for drying, measures the temperature, the humidity, etc. of the exhaust air, and based on the result. By controlling so that the humidity evaporating from the water-based coating layer is kept constant, fluctuations in the amount of water evaporated from the material to be dried are suppressed and the dry state is controlled to be constant.
【０００５】以下、図面に基づいて本発明を詳しく説明
する。図１は、本発明の概略の構成を示すものであり、
本発明の構成による塗布層の乾燥方法は、コーターヘッ
ド（図示せず）により塗布された帯状物からなる被乾燥
体Ｗを乾燥装置１に連続して送り込み、乾燥するもので
ある。本発明において、帯状物とは、塗工紙、塗工フィ
ルムのような帯状物又は連続搬送されるシート状物ある
いはウェブ等を総称するものである。又、被乾燥体の表
面及び裏面に風を吹き付ける手段を備えた非接触搬送
（特開昭５７−６３１６３号）及び表面のみに風を吹き
付ける接触搬送（特公昭４８−４４１７１号）のいずれ
の乾燥手段も本発明に適用できる。図において、乾燥装
置１には、空気加熱装置２と送気ファン３から成る熱風
発生機が備えられており、新鮮な外気取り入れ口４から
取り込まれた空気は、所定の設定温度に加熱される。加
熱された空気は、送気ファン３により送気用ダクト５を
介して乾燥ゾーンに送られて塗布層を乾燥する。塗布層
の乾燥により蒸発した水分は、排気ファン６により排気
用ダクト７を介して排気されるが、この際、排気の全量
を屋外に排出するか、または、排気の一部を循環用ダン
パー８を介して加熱装置２に送り、再使用する。この場
合、必要により乾燥手段を設けて乾燥することは当然で
ある。送気及び排気の風量は、インバータ制御された送
排気用ファン３，６を用いて調節されるようになってい
るし、又、送気用ダクト及び排気用ダクトに設けた自動
化ダンパーの開度を調節して行なうようにしても構わな
い。The present invention will be described in detail below with reference to the drawings. FIG. 1 shows a schematic configuration of the present invention.
The method of drying the coating layer according to the configuration of the present invention is to continuously feed the material to be dried W composed of a belt-shaped material applied by a coater head (not shown) to the drying device 1 to dry it. In the present invention, the belt-like material is a generic term for a belt-like material such as coated paper and a coated film, or a continuously conveyed sheet-like material or web. Further, any of the non-contact conveyance equipped with a means for blowing air on the front and back surfaces of the material to be dried (JP-A-57-63163) and the contact conveyance for blowing air only on the front surface (JP-B-48-41171). Means can also be applied to the present invention. In the figure, the drying device 1 is provided with a hot air generator comprising an air heating device 2 and an air supply fan 3, and the air taken in from the fresh outside air intake port 4 is heated to a predetermined set temperature. .. The heated air is sent by the air supply fan 3 to the drying zone via the air supply duct 5 to dry the coating layer. The water vaporized by drying the coating layer is exhausted by the exhaust fan 6 through the exhaust duct 7. At this time, the entire amount of exhaust is discharged outdoors, or a part of the exhaust is circulated by the circulation damper 8 To the heating device 2 for reuse. In this case, it goes without saying that a drying means is provided if necessary for drying. The air volume of air supply and exhaust is adjusted by using the inverter-controlled air supply and exhaust fans 3 and 6, and the opening degree of an automated damper provided in the air supply duct and the exhaust duct. May be adjusted.
【０００６】一方、送気用ダクト５内には送気湿度を検
出する湿度計９（例えば、赤外線式、ジルコニア式、露
点式等の高温湿度計）が、又、排気用ダクト７内には被
乾燥体から蒸発する水分を検出する湿度計１０が、それ
ぞれ配設されており、これらの湿度計はそれぞれ出力変
換器１１及び１２の入力端子に接続されており、各変換
器からはコンピュータ１３に対して出力されていて、コ
ンピュータは湿度計９，１０の検出結果に基づいて最適
設定値の演算を行なって、蒸発する水分が一定になるよ
うに、送気ファンのインバータを調整制御するように構
成されている。従って、塗布層の含水層は、送気湿度が
変動しても送気風量の調整により蒸発する水分量を制御
するため、乾燥終点においては、含水率が一定になるよ
うに制御することができる。例えば、本発明の乾燥工程
が２以上の区画（図における１Ｚ，２Ｚ及び３Ｚ）に分
割されて施される場合、分割された乾燥工程のいずれの
工程で施されてもよいが、乾燥終点においては、塗布層
の含水率は一定にされる。しかし、塗布層によっては、
その物理的特性、化学的特性の劣化に対処するために
は、ある含水率に対応して乾燥速度を制御する必要があ
るものもある。On the other hand, a hygrometer 9 (for example, a high temperature hygrometer such as an infrared type, a zirconia type, a dew point type, etc.) for detecting the air feeding humidity is provided in the air sending duct 5, and also in the exhaust duct 7. Are each provided with a hygrometer 10 for detecting water vaporized from the object to be dried. These hygrometers are connected to the input terminals of the output converters 11 and 12, respectively. The data is output to 13, and the computer calculates the optimum set value based on the detection results of the hygrometers 9 and 10, and adjusts and controls the inverter of the air supply fan so that the evaporated water becomes constant. Is configured. Therefore, the water-containing layer of the coating layer controls the amount of water that evaporates by adjusting the air flow rate even if the air-feeding humidity fluctuates, so that the water content can be controlled to be constant at the drying end point. .. For example, when the drying step of the present invention is divided into two or more compartments (1Z, 2Z and 3Z in the figure), the drying step may be performed in any of the divided drying steps. The water content of the coating layer is kept constant. However, depending on the coating layer,
In some cases, it is necessary to control the drying rate corresponding to a certain water content in order to cope with the deterioration of the physical properties and chemical properties.
【０００７】本発明の好ましい実施態様は、乾燥工程が
少なくとも２以上に分割されることであり、該工程にお
ける乾燥を塗布層の面形成に影響が少ないゾーンで実施
することである。例えば、第１〜第３の三つの乾燥ゾー
ンに分割された乾燥工程を用いる場合、最初の第１ゾー
ンの工程においては、乾燥条件を一定にしておいて、そ
れより後の第２及び第３ゾーンの工程において、乾燥条
件である風量を制御することである。また、場合によっ
ては、熱に対して影響を受けない塗布組成物の乾燥の際
には、風量の代りに温度を制御してもよい。本発明は、
感熱記録材料である感熱層及びその上に塗布するバリヤ
ー層等のように熱鋭敏性製品の塗布層を乾燥するのに最
適である。また、例えば感熱層に含まれる水分が２５％
の場合の送り出し速度は３５ｍ／ｍｉｎで実施できる。A preferred embodiment of the present invention is that the drying step is divided into at least two or more steps, and the drying in the step is carried out in a zone having little influence on the surface formation of the coating layer. For example, when using a drying step divided into three drying zones, first to third, in the first step of the first zone, the drying conditions are kept constant, and the second and third drying steps after that are performed. In the zone process, it is to control the air volume which is the drying condition. In some cases, the temperature may be controlled instead of the air volume when the coating composition that is not affected by heat is dried. The present invention is
It is most suitable for drying a coating layer of a heat-sensitive product such as a heat-sensitive layer which is a heat-sensitive recording material and a barrier layer coated thereon. Also, for example, the moisture content of the heat sensitive layer is 25%.
In the case of, the feeding speed can be carried out at 35 m / min.
【０００８】[0008]
【実施例】以下に本発明の具体的実施例を基に、本発明
の効果を例証する。下記の表１に示す１Ｚ，２Ｚ及び３
Ｚの三つに区分された乾燥工程から成るジェットノズル
式乾燥装置において、各工程は湿度及び風量を各々独立
に設定できる設備を備えており、この装置を用いて、感
熱磁気回数券の感熱層の乾燥を行なった。その条件とし
ては、磁気材料を塗工済みの１８８μｍの乳白ポリエチ
レンフタレートフィルムの表面にロイコ染料発色系の感
熱発色層用溶液を６ｇ／ｍ2（ドライ）塗布して、搬送
速度３５ｍ／ｍｉｎで乾燥処理した。その時の乾燥条件
及び結果は表１の通りであった。以下余白EXAMPLES The effects of the present invention will be illustrated below based on specific examples of the present invention. 1Z, 2Z and 3 shown in Table 1 below
In a jet nozzle type drying device consisting of drying processes divided into three Z, each process is equipped with equipment that can independently set the humidity and the air volume. Was dried. The conditions are as follows: A leuco dye coloring system solution for a thermosensitive coloring layer is applied at 6 g / m 2 (dry) on the surface of a 188 μm opalescent polyethylene phthalate film coated with a magnetic material and dried at a conveying speed of 35 m / min. Processed. The drying conditions and the results at that time are shown in Table 1. Margin below
【０００９】[0009]
【表１】 [Table 1]
【００１０】上記乾燥条件において、設定風量ＨＺはイ
ンバータファンのヘルツを指す。１Ｚについては塗布面
の安定形成の意味あいで無制御とし、２Ｚ及び３Ｚにつ
いて風量制御を行った。湿度については、計算の基準と
して温度によって変化しない乾燥空気１Ｋｇ中に含まれ
る水蒸気の重量（Ｋｇ）として表される絶対湿度を採用
した。上表中の絶対湿度値は、被乾燥体より蒸発した水
分量から処理空気中の水分量を差し引いた値で、蒸発し
た実績量を表したものである。また、水分蒸発量につい
ては、上記絶対湿度に排気風量を掛けて単位時間あたり
の水分蒸発量として各ゾーンごとに示した。上記の結果
は、塗工速度（３５ｍ／ｍｉｎ）、塗工幅（４００ｍ
ｍ）、塗料濃度（２５％）、塗布量（６ｇ／ｍ2）等か
ら求めた水分蒸発量（１５．１２ｋｇ／ｈｒ）と本実施
例（１５．４２ｋｇ／ｈｒ）のものとは非常に良く一致
している。Under the above drying conditions, the set air volume HZ indicates the hertz of the inverter fan. No control was applied to 1Z in terms of stable formation of the coated surface, and airflow control was performed for 2Z and 3Z. Regarding the humidity, the absolute humidity expressed as the weight (Kg) of water vapor contained in 1 kg of dry air, which does not change with temperature, was adopted as the calculation standard. The absolute humidity value in the above table is a value obtained by subtracting the amount of water in the treated air from the amount of water evaporated from the object to be dried, and represents the actual amount of evaporation. The amount of water evaporation is shown for each zone as the amount of water evaporation per unit time by multiplying the absolute humidity by the amount of exhaust air. The above results are the coating speed (35m / min), coating width (400m
m), paint concentration (25%), coating amount (6 g / m 2 ) and the like, and the water evaporation amount (15.12 kg / hr) and this example (15.42 kg / hr) are very good. Match.
【００１１】[0011]
【発明の効果】本発明によれば、送気湿度と、排気湿度
とをコンピュータに出力し、最適設定値を演算するとい
う手段により、常に乾燥条件を合理的に制御することに
より設定できるので、乾燥終点を同じくして、化学的特
性及び物理的特性の安定した、欠点のない塗布層を得る
ことができる。According to the present invention, the air supply humidity and the exhaust air humidity are output to a computer and the optimum set value is calculated, so that the drying condition can be set by rationally controlling the drying condition. With the same drying end point, a coating layer having stable chemical and physical properties and having no defects can be obtained.
【図１】本発明の概略構成図である。FIG. 1 is a schematic configuration diagram of the present invention.
１ 乾燥装置 ２ 加熱装置 ３ 送気ファン ４ 空気取入れ口 ５ 送気用ダクト ６ 排気ファン ７ 排気用ダクト ８ 循環用ダンパー ９ 湿度計（送気湿度測定用） １０ 湿度計（蒸発水分測定用） １１ 変換器（送気湿度測定用） １２ 変換器（蒸発水分測定用） １３ コンピュータ（パソコン） 1 Drying Device 2 Heating Device 3 Air Supply Fan 4 Air Intake Port 5 Air Supply Duct 6 Exhaust Fan 7 Exhaust Duct 8 Circulation Damper 9 Hygrometer (For Air Supply Humidity Measurement) 10 Hygrometer (For Evaporated Moisture Measurement) 11 Transducer (for measuring air humidity) 12 Transducer (for measuring evaporated water content) 13 Computer (personal computer)
Claims (1)
燥する方法において、該装置における送気用ダクト内に
湿度計を設けて送気湿度を検出し、排気用ダクト内に湿
度計を設けて被乾燥体の蒸発水分量を検出し、それぞれ
の湿度計は出力変換器に接続し、各変換器からの湿度情
報をコンピュータに出力し、最適設定値の演算を行い、
加熱温度、送気量及び排気量を制御して乾燥することを
特徴とする帯状物の乾燥法。1. A method for continuously feeding a belt-like material to a drying device for drying, wherein a hygrometer is provided in an air supply duct of the device to detect air supply humidity, and a hygrometer is provided in an exhaust duct. Detects the amount of water vaporized from the object to be dried, connects each hygrometer to an output converter, outputs the humidity information from each converter to a computer, and calculates the optimum set value.
A method for drying a belt-like material, which comprises drying by controlling a heating temperature, an air supply amount, and an exhaust gas amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23370591A JPH0550023A (en) | 1991-08-22 | 1991-08-22 | Method for drying band-shaped material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23370591A JPH0550023A (en) | 1991-08-22 | 1991-08-22 | Method for drying band-shaped material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0550023A true JPH0550023A (en) | 1993-03-02 |
Family
ID=16959260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23370591A Pending JPH0550023A (en) | 1991-08-22 | 1991-08-22 | Method for drying band-shaped material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0550023A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006502838A (en) * | 2002-09-10 | 2006-01-26 | エス．アイ．ピー．エイ．ソシエタ インダストリアリザッジオーネ プロジェッタジオーネ エ オートマジオーネ ソシエタ ペル アチオネ | Method and apparatus for processing a coating on a thermoplastic container |
| JP2007331393A (en) * | 2006-06-09 | 2007-12-27 | Heidelberger Druckmas Ag | Method for determining operation parameter of printing press |
| WO2009118599A1 (en) * | 2008-03-24 | 2009-10-01 | Toyota Jidosha Kabushiki Kaisha | Drying system, continuous strip, battery, and battery manufacturing system |
| JP2015515736A (en) * | 2012-05-15 | 2015-05-28 | エルジー・ケム・リミテッド | Automatic air supply flow control device for electrode drying oven for secondary battery manufacturing |
| WO2023246220A1 (en) * | 2022-06-24 | 2023-12-28 | 宁德时代新能源科技股份有限公司 | Electrode plate drying apparatus, battery production device, and electrode plate drying method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6070084A (en) * | 1983-06-27 | 1985-04-20 | ザ ボ−ド オブ トラステイ−ズ オブ ザ レランド スタンフオ−ド ジユニア ユニバ−シテイ | Dispersing promotor |
| JPH01261637A (en) * | 1988-04-12 | 1989-10-18 | Mitsubishi Paper Mills Ltd | Method of controlling drying stage of web coated with liquid composition |
| JPH03503260A (en) * | 1988-03-09 | 1991-07-25 | イーストマン・コダック・カンパニー | Drying method |
-
1991
- 1991-08-22 JP JP23370591A patent/JPH0550023A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6070084A (en) * | 1983-06-27 | 1985-04-20 | ザ ボ−ド オブ トラステイ−ズ オブ ザ レランド スタンフオ−ド ジユニア ユニバ−シテイ | Dispersing promotor |
| JPH03503260A (en) * | 1988-03-09 | 1991-07-25 | イーストマン・コダック・カンパニー | Drying method |
| JPH01261637A (en) * | 1988-04-12 | 1989-10-18 | Mitsubishi Paper Mills Ltd | Method of controlling drying stage of web coated with liquid composition |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006502838A (en) * | 2002-09-10 | 2006-01-26 | エス．アイ．ピー．エイ．ソシエタ インダストリアリザッジオーネ プロジェッタジオーネ エ オートマジオーネ ソシエタ ペル アチオネ | Method and apparatus for processing a coating on a thermoplastic container |
| JP2007331393A (en) * | 2006-06-09 | 2007-12-27 | Heidelberger Druckmas Ag | Method for determining operation parameter of printing press |
| WO2009118599A1 (en) * | 2008-03-24 | 2009-10-01 | Toyota Jidosha Kabushiki Kaisha | Drying system, continuous strip, battery, and battery manufacturing system |
| JP2015515736A (en) * | 2012-05-15 | 2015-05-28 | エルジー・ケム・リミテッド | Automatic air supply flow control device for electrode drying oven for secondary battery manufacturing |
| WO2023246220A1 (en) * | 2022-06-24 | 2023-12-28 | 宁德时代新能源科技股份有限公司 | Electrode plate drying apparatus, battery production device, and electrode plate drying method |
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