JPS603881A - Plastic molding heater having ptc property and method of producing same - Google Patents
Plastic molding heater having ptc property and method of producing sameInfo
- Publication number
- JPS603881A JPS603881A JP11122683A JP11122683A JPS603881A JP S603881 A JPS603881 A JP S603881A JP 11122683 A JP11122683 A JP 11122683A JP 11122683 A JP11122683 A JP 11122683A JP S603881 A JPS603881 A JP S603881A
- Authority
- JP
- Japan
- Prior art keywords
- molded body
- heating element
- molded
- metal plating
- collector electrode
- 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
- Resistance Heating (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
産業上の利用分野
この発明は正の温度係数(以下PTCと称す)を有する
素子を利用した保温或いは加熱用に用いられるPTC特
性を有するプラスチック成型発熱体およびその製造方法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a plastic molded heating element having PTC characteristics used for heat retention or heating using an element having a positive temperature coefficient (hereinafter referred to as PTC), and a method for manufacturing the same. It is related to.
従来例の構成とその問題点
従来PTC特性を利用した発熱体としては、セラミック
系(例えばチタン酸バリウムを主成分とする)やプラス
チック系等が開発されているが、なかでもプラスチック
系成型発熱体は形状の自由度が高くまだ強靭性を有する
などの理由で近年脚光をあびている。しかしながら、プ
ラスチック成型発熱体の場合、その集電極として現状は
主に導体ペースト(主として銀ペースト)をスクリーン
印刷等の工法により設ける方法がとられているが、この
場合だと1)電流容量が小く、耐蝕性が悪く、さらに複
雑な形状の成型体への応用が困難であるなどの欠点があ
った。Conventional configurations and their problems Conventional heating elements that utilize PTC characteristics include ceramic systems (for example, containing barium titanate as the main component) and plastic systems, but among them, molded plastic heating elements has been attracting attention in recent years because it has a high degree of freedom in shape and is still strong. However, in the case of plastic molded heating elements, the current method is to use conductor paste (mainly silver paste) as the collector electrode using methods such as screen printing; however, in this case, 1) the current capacity is small; It has drawbacks such as poor corrosion resistance, and difficulty in applying it to molded bodies with complex shapes.
発明の目的
本発明は上記欠点に鑑み金属メッキによる集電極構成法
を導入することにより、どの様な複雑な形状においても
対応が出来、電流容量が高く、信頼性の高い集電極を有
するプラスチック成型発熱体およびその製造方法を提供
することを目的とする。Purpose of the Invention In view of the above-mentioned drawbacks, the present invention introduces a collector electrode construction method using metal plating, thereby creating a plastic molded collector electrode that can be applied to any complex shape, has a high current capacity, and has a highly reliable collector electrode. An object of the present invention is to provide a heating element and a method for manufacturing the same.
発明の構成
この目的を達成するために本発明のPTC特注を有する
プラスチック成型発熱体およびその製造方法にその表面
の拡大化処理を行ない、その表面に金属メッキを施し集
電極としたものであり、集電極が金属でのるため導電性
が良好で電流容量が高くとれ、またメッキ法であるため
複雑な形状の成型体の集電極構成が可能となりまた金属
メッキ材質が多種類存在することよりその選択により耐
蝕性の優れた集電極を構成することが可能となる。Structure of the Invention In order to achieve this object, the plastic molded heating element with PTC customization and the manufacturing method thereof of the present invention are subjected to surface enlarging treatment, and the surface is plated with metal to form a collector electrode. Since the collector electrode is made of metal, it has good conductivity and a high current capacity, and since it is a plating method, it is possible to construct the collector electrode in a molded body with a complex shape. Depending on the selection, it is possible to construct a collector electrode with excellent corrosion resistance.
実施例の説明
以下本発明の一実施例について第1図〜第6図と共に説
明する。DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.
第1図はPTC特注を有するプラスチック成型発熱体の
集電極構成の製造工程例である。第1図において成型体
素材(第2図1)の表面拡大化処理(サンドブラスト法
による機械的ホーニング処理が望ましい)を行なう(第
3図)。次にアルカリ水溶液などで脱脂、洗浄後キャタ
リスト・アクセレータ法にて前処理を行ない銅・ニッケ
ルなどの無電解メッキを施す。この際メッキ材厚として
は次工程の電解メッキ用の電極を付与するのが目的であ
るため0.2〜0.5μmにて十分なものである。つい
でこの状態にて沸騰水中などの湿潤状態にてアニーリン
グを行なう。さらに前述の無電解メッキ層をメッキ用の
電極として次に電解メッキを行なう(第4図)。この電
解メッキの材質としては、成型体素材1の熱膨張率に対
しての追従性のある柔軟なものを選択する必要があり、
またメッキ材厚については最終発熱体製品として要求さ
れる電流容量を考慮して決定する必要がある。FIG. 1 is an example of the manufacturing process of a collecting electrode configuration of a plastic molded heating element with a custom PTC. In FIG. 1, the surface of the molded body material (FIG. 2, FIG. 1) is subjected to surface enlarging treatment (preferably mechanical honing by sandblasting) (FIG. 3). Next, after degreasing and cleaning with an alkaline aqueous solution, pretreatment is performed using the catalytic accelerator method, and electroless plating with copper, nickel, etc. is applied. At this time, the thickness of the plating material is 0.2 to 0.5 μm, which is sufficient because the purpose is to provide an electrode for electrolytic plating in the next step. Then, in this state, annealing is performed in a wet state such as in boiling water. Furthermore, electrolytic plating is then performed using the electroless plating layer described above as a plating electrode (FIG. 4). As the material for this electrolytic plating, it is necessary to select a flexible material that can follow the coefficient of thermal expansion of the molded body material 1.
Furthermore, the thickness of the plating material must be determined in consideration of the current capacity required for the final heating element product.
次に塩水、油、硫化ガスなどに対する耐蝕性をもたすべ
くニッケル、金、スズなどの材質を選択しオーバーメッ
キを施す。そして最後に第5図に示す様に電極メッキ部
の部分削除を行ない対向集電極2a、2bを構成せしめ
る。第2図〜第5図については単純な形状の平板の場合
であるが、第6図に示す様に円筒或いはその他の複雑な
形状のものについて前述の第1図に示す工程にて容易に
対応が可能である。Next, overplating is performed by selecting a material such as nickel, gold, or tin to provide corrosion resistance against salt water, oil, sulfide gas, etc. Finally, as shown in FIG. 5, the electrode plated portions are partially removed to form opposing collector electrodes 2a and 2b. Figures 2 to 5 are for flat plates with simple shapes, but as shown in Figure 6, cylinders or other complex shapes can be easily handled using the process shown in Figure 1 above. is possible.
ここにおいて前述の表面拡大化処理について、その目的
は成型体素材表面を粗化せしめその上に形成する金属メ
ッキ層の投錨効果にて該メッキ層の接着強度の向上を図
るものであるが、その表面粗度の程度はRaで6μm以
上とする。これは第7図に示す様にRaで6μm以上に
おいてメッキ電極の接着強度は定常値を示していること
から明らかである。なお、表面拡大化処理を施さない場
合の素材の表面粗度はRaで0.4μm程度でありそれ
に集電極を構成した場合その接着強度は約25g/10
mmと極めて低いものである。The purpose of the above-mentioned surface enlarging treatment is to roughen the surface of the molded body material and improve the adhesive strength of the metal plating layer formed thereon by the anchoring effect of the metal plating layer. The degree of surface roughness is set to be 6 μm or more in terms of Ra. This is clear from the fact that the adhesive strength of the plated electrode shows a steady value at Ra of 6 μm or more, as shown in FIG. Note that the surface roughness of the material without surface enlarging treatment is approximately 0.4 μm in Ra, and when a collector electrode is formed on it, the adhesive strength is approximately 25 g/10
mm, which is extremely low.
つぎに本発明のさらに具体的な実施例について説明する
。Next, more specific embodiments of the present invention will be described.
ポリフッ化ビニリデンとカーボンブラックとの混練物を
粉砕することにより得られる粉体と熱硬化性樹脂である
エポキシ樹脂との混合物を加熱圧縮成型を行ない硬化せ
しめたPTC特注を有する成型発熱体素層表面をブラス
ト材(例えば溶融アルミナ粒30番)にて表面拡大化処
理を行なった。The surface of a molded heating element element layer with a custom-made PTC made by heating and compression molding a mixture of powder obtained by pulverizing a mixture of polyvinylidene fluoride and carbon black and an epoxy resin, which is a thermosetting resin, to harden it. The surface was enlarged using a blasting material (for example, fused alumina particles No. 30).
ついで10%水酸化ナトリウム水溶液にて70℃3分間
の脱脂をし水洗後キャタリスト・アクセレータ法にて前
処理を行ないその後無電解銅メッキを約0.3〜0.5
μm施した。次に沸騰水中にて約10分間のアニーリン
グ処理をし、ついでビロリン酸銅メッキを約10μm施
しその後オルバーメッキとして無電解ニッケルメッキを
施した。Next, degrease with 10% sodium hydroxide aqueous solution at 70°C for 3 minutes, wash with water, pre-treat with catalyst accelerator method, and then apply electroless copper plating to approximately 0.3 to 0.5
μm was applied. Next, it was annealed in boiling water for about 10 minutes, then copper birophosphate plating was applied to a thickness of about 10 μm, and then electroless nickel plating was applied as Olver plating.
最後にエージング(150℃にて60分間)を行なった
後第6図及び第6図に示す様にメッキ部の部分削除を行
ない対向の集電極とし製品を得た。Finally, after aging (60 minutes at 150° C.), the plated portion was partially removed as shown in FIGS. 6 and 6 to obtain a product as an opposing collector electrode.
前記の製造工程において、表面拡大化処理後の成型体素
材の表面粗度はRaにて6〜7μmでありまた最終に得
られた製品の集電極の接着強度は中10mmのビーリン
グ強度において約450gであり発熱体の集電極上して
も各種の信頼性試験、例えば−30℃←→200℃の熱
衝激試験、80℃相対湿度95%の槽中での断続通電試
験などにおいても外観上或いに電気特注上も何ら問題は
生じなかった。なお、前記の製造工程において湿潤エー
ジングを施した場合は施さない場合のビーリング強度約
400gに比べ10%程度の強度増が得られることより
この湿潤アニーリングは効果のある工程であると言える
。またオーバルメッキとして無電解メッキを選択した理
由は耐蝕性という見地から平均したメッキ層を得るため
でありそのメッキ材厚はピンホールの発生を少なくする
目的で約6μmとした。In the above manufacturing process, the surface roughness of the molded body material after the surface enlargement treatment is 6 to 7 μm in Ra, and the adhesive strength of the collector electrode of the final product is approximately 10 mm at the beading strength of 10 mm. 450g, and even when placed on the collector electrode of the heating element, the appearance has been maintained even in various reliability tests such as -30℃←→200℃ thermal shock test, intermittent current test in a bath at 80℃ and 95% relative humidity, etc. There were no problems with the construction or the electrical customization. In addition, when wet aging is applied in the above manufacturing process, the strength is increased by about 10% compared to the beer strength of about 400 g when not applied, so it can be said that this wet annealing is an effective process. Further, the reason why electroless plating was selected as the oval plating was to obtain an average plating layer from the viewpoint of corrosion resistance, and the thickness of the plating material was set to about 6 μm in order to reduce the occurrence of pinholes.
発明の効果
以上の様に構成された本発明のPTC特注を有するプラ
スチック成型発熱体およびその製造方法によれば、集電
極として金属メッキを採用したため電流容量が高くとれ
るという事とともに成型体素材全面にメッキ処理をしそ
の後一部を削除し集電極にするため発熱体の形状が複雑
であっても対応できるものである。また耐溶済性などの
環境特性の優れた信頼性の高い発熱体が提供できるもの
である。さらに、サンドブラスト法による表面拡大化処
理を施しているため金属メッキ部の投錨効果にて素材と
メッキ材との接着強要が高いものであるとともに最終製
品においても発熱体表面に粗化状態が保たれており、こ
れにより例えば液体の加熱などの場合、液体との接触面
積が多いため発熱効率が増大する効果も奏される。According to the plastic molded heating element with custom-made PTC and its manufacturing method of the present invention, which has more than the effects of the invention, metal plating is adopted as the collector electrode, so a high current capacity can be obtained, and the entire surface of the molded body material is It can be used even if the shape of the heating element is complex because it is plated and then a part is removed to make a collector electrode. Furthermore, a highly reliable heating element with excellent environmental properties such as melting resistance can be provided. Furthermore, since the surface is enlarged by sandblasting, the anchoring effect of the metal plating part creates a strong bond between the material and the plating material, and the roughened state of the heating element surface is maintained in the final product. As a result, in the case of heating a liquid, for example, there is an effect of increasing the heat generation efficiency because the contact area with the liquid is large.
第1図は本発明の実施例における成型発熱体の製造工程
を示す工程図、第2図〜第6図は同工程における成形発
熱体の斜視図、第6図は本発明の他の実施例の斜視図、
第7図は本発明の成形発熱体の集電極の表面粗度に対す
る接着強度を示す図である。
1・・・・・・成型体素材、2a、2b・・・・対向集
電極。
代理人の氏名 弁理士 中 尾 敏 男 ほか1名第1
図
第 2 図
第3図
第4図Figure 1 is a process diagram showing the manufacturing process of a molded heating element in an embodiment of the present invention, Figures 2 to 6 are perspective views of the molded heating element in the same process, and Figure 6 is another embodiment of the invention. A perspective view of
FIG. 7 is a diagram showing the adhesive strength with respect to the surface roughness of the collector electrode of the shaped heating element of the present invention. 1... Molded body material, 2a, 2b... Opposing collector electrode. Name of agent: Patent attorney Toshio Nakao and 1 other person 1st
Figure 2 Figure 3 Figure 4
Claims (4)
れていることを特徴とするPTC特性を有するプラスチ
ック成型発熱体。(1) A plastic molded heating element having PTC characteristics, characterized in that the collector electrode is formed by applying metal plating on the molded body.
体表面に金属メッキを形成せしめる工程とを有すること
を特徴とするPTC特性を有するプラスチック成型発熱
体の製造方法。(2) A method for manufacturing a plastic molded heating element having PTC characteristics, comprising the steps of subjecting the surface of the molded body to an enlarging treatment and forming metal plating on the surface of the molded body.
線平均粗さ(Ra)で6μm以上であることを特徴とす
る特許請求の範囲第2項記載のPTC特注を有するプラ
スチック成型発熱体の製造方法。(3) Plastic molding heat generation with PTC customization according to claim 2, characterized in that the surface roughness of the molded product is 6 μm or more in center line average roughness (Ra) as measured by a Talysurf surface roughness meter. How the body is manufactured.
体の全表面に金属メッキを施し、その後前記メッキの1
部を削除し集電極として構成する工程であることを特徴
とする特許請求の範囲第2項記載のPTCM性を有する
プラスチック成型発熱体の製造方法。(4) The step of applying metal plating to the surface of the molded body includes applying metal plating to the entire surface of the molded body, and then applying metal plating to the entire surface of the molded body, and then applying metal plating to the surface of the molded body.
3. A method for manufacturing a plastic molded heating element having PTCM properties as claimed in claim 2, characterized in that the step is to remove a portion of the heating element and configure it as a collector electrode.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11122683A JPS603881A (en) | 1983-06-20 | 1983-06-20 | Plastic molding heater having ptc property and method of producing same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11122683A JPS603881A (en) | 1983-06-20 | 1983-06-20 | Plastic molding heater having ptc property and method of producing same |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS603881A true JPS603881A (en) | 1985-01-10 |
Family
ID=14555738
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11122683A Pending JPS603881A (en) | 1983-06-20 | 1983-06-20 | Plastic molding heater having ptc property and method of producing same |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS603881A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4910988A (en) * | 1987-01-09 | 1990-03-27 | Nippon Steel Corporation | Method for rolling metal sheets |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5029143U (en) * | 1973-07-12 | 1975-04-02 | ||
JPS5772289A (en) * | 1980-10-23 | 1982-05-06 | Matsushita Electric Ind Co Ltd | Heater and method of producing same |
-
1983
- 1983-06-20 JP JP11122683A patent/JPS603881A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5029143U (en) * | 1973-07-12 | 1975-04-02 | ||
JPS5772289A (en) * | 1980-10-23 | 1982-05-06 | Matsushita Electric Ind Co Ltd | Heater and method of producing same |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4910988A (en) * | 1987-01-09 | 1990-03-27 | Nippon Steel Corporation | Method for rolling metal sheets |
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