JPS6336267Y2 - - Google Patents
Info
- Publication number
- JPS6336267Y2 JPS6336267Y2 JP1979104051U JP10405179U JPS6336267Y2 JP S6336267 Y2 JPS6336267 Y2 JP S6336267Y2 JP 1979104051 U JP1979104051 U JP 1979104051U JP 10405179 U JP10405179 U JP 10405179U JP S6336267 Y2 JPS6336267 Y2 JP S6336267Y2
- Authority
- JP
- Japan
- Prior art keywords
- dew condensation
- moisture
- sensitive material
- material layer
- electrode pattern
- 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
Links
- 238000009833 condensation Methods 0.000 claims description 19
- 230000005494 condensation Effects 0.000 claims description 19
- 239000011230 binding agent Substances 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 229910001111 Fine metal Inorganic materials 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 238000007639 printing Methods 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 239000000758 substrate Substances 0.000 description 7
- 239000010410 layer Substances 0.000 description 3
- 229920006254 polymer film Polymers 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229920005570 flexible polymer Polymers 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 1
- 229910000165 zinc phosphate Inorganic materials 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Description
【考案の詳細な説明】
本考案は経年変化の少ない露結センサに関す
る。[Detailed Description of the Invention] The present invention relates to a dew sensor that exhibits little deterioration over time.
現在使用されている露結センサは大別して二種
類あり、その一方は可撓性高分子フイルムの両面
に接着層を形成し、一方に金属箔を貼り付け、フ
オトエツチング処理を施して櫛歯状電極を形成す
るものであり、他方は硬質のセラミツク基板上に
金属電極を形成し感湿膜を塗布するものである。
ビデオテープレコーダの露結センサはガイドシリ
ンダ表面に生ずる露結を検出するものであり、ガ
イドシリンダに密着して露結センサ表面とガイド
シリンダ表面を同一温度とする力が望ましく、こ
の点に関し前者は堅牢さに欠けるものの後者に比
し優れている。 There are two main types of dew condensation sensors currently in use. One is a flexible polymer film with an adhesive layer formed on both sides, a metal foil pasted on the other side, and photo-etched to create a comb-like shape. One is to form an electrode, and the other is to form a metal electrode on a hard ceramic substrate and coat it with a moisture-sensitive film.
The dew condensation sensor of a video tape recorder detects dew condensation occurring on the surface of the guide cylinder, and it is desirable that the dew condensation sensor be in close contact with the guide cylinder so that the surface of the dew condensation sensor and the surface of the guide cylinder are at the same temperature. Although it lacks robustness, it is superior to the latter.
しかし前者の露結センサはガイドシリンダに貼
付された状態で経年変化に伴い貼付部分が剥離す
ると云う現象を生じた。この原因は、露結センサ
を構成する金属箔と高分子フイルムの熱膨張係数
が一桁異なるため温度変化に伴う高分子フイルム
の歪に起因することを確認した。 However, the former dew condensation sensor has a phenomenon in which the attached portion peels off over time while attached to the guide cylinder. It was confirmed that the cause of this was due to distortion of the polymer film due to temperature changes, since the thermal expansion coefficients of the metal foil and polymer film that make up the dew condensation sensor differed by one order of magnitude.
そこで本考案は上述の点に鑑み、電極部の熱膨
張係数を高分子フイルムの熱膨張係数に近似若く
は一致せしめることにより、露結センサの剥離現
象を解消した安価な露結センサを提案せんとする
ものである。 Therefore, in view of the above-mentioned points, the present invention proposes an inexpensive dew condensation sensor that eliminates the peeling phenomenon of the dew condensation sensor by making the thermal expansion coefficient of the electrode part approximately equal to the thermal expansion coefficient of the polymer film. That is.
以下本考案を図示せる一実施例に従い説明す
る。本実施例の露結センサは、ポリエステル製の
シート状基板１に、金属微粉抹を混入せしめたポ
リウレタン系のバインダをスクリーン印刷によつ
て櫛歯状の電極パターン２，２（第２図参照）を
印刷形成して該電極パターンを熱処理によつて定
着せしめた後、親水性のリン酸亜鉛等の感湿材を
塗布した感湿材層３上でシリコン樹脂を吹き付け
塗布した透湿性の被膜４を形成する一方、前記基
板１裏面に接着層５を形成して成る。 The present invention will be described below with reference to an illustrative embodiment. The dew condensation sensor of this embodiment is made by screen printing a polyurethane binder mixed with fine metal powder on a sheet-like substrate 1 made of polyester to form comb-shaped electrode patterns 2, 2 (see Fig. 2). After printing and fixing the electrode pattern by heat treatment, a moisture permeable coating 4 is formed by spraying silicone resin on the moisture sensitive material layer 3 coated with a hydrophilic moisture sensitive material such as zinc phosphate. On the other hand, an adhesive layer 5 is formed on the back surface of the substrate 1.
従つてガイドシリンダ周面に貼付した上で螺着
固定した露結センサは、ガイドシリンダの露結と
共に前記被膜４を通過する水蒸気を感湿材層３上
に凝結せしめ前記電極２，２間の抵抗値を減少せ
しめ露結状態を検出する。 Therefore, the dew sensor attached to the circumferential surface of the guide cylinder and fixed by screwing causes the water vapor passing through the coating 4 to condense on the moisture sensitive material layer 3 as well as the dew on the guide cylinder, and causes the water vapor between the electrodes 2, 2 to condense on the moisture sensitive material layer 3. Detects dew condensation by decreasing the resistance value.
本実施例では、ポリエステルシートと金属含有
バインダの膨張係数を一致若くは近似せしめるた
め露結センサを構成する前記基板１と前記電極パ
ターン２，２が熱変化によつて歪む惧れもなく、
常に前記基板１をガイドシリンダに密に接着固定
することができる。又、金属含有バインダの膨張
係数をほぼ一致せしめる構成であるから、構成が
簡単となり、膨張係数のほぼ一致した電極パター
ン形成も簡単にできる。またポリウレタン系のバ
インダは比較的低温で熱処理をすることができる
ため定着時基板に歪を生ずる惧もない。尚金属含
有バインダの抵抗は数十Ω／cmであり従来の電極
パターンに比し大抵抗ではあるが、露結センサの
電極間抵抗は10MΩ〜10KΩの範囲で変化するた
め、実用上全く問題ない。更に本実施例ではシリ
コンの透湿性被膜を形成して露結面にイオン性の
塵埃が付着するのを防止するため露結感度の経年
変化をも解消できる。 In this embodiment, since the expansion coefficients of the polyester sheet and the metal-containing binder are matched or approximated, there is no fear that the substrate 1 and the electrode patterns 2, 2, which constitute the dew condensation sensor, will be distorted due to thermal changes.
The substrate 1 can always be tightly adhesively fixed to the guide cylinder. Furthermore, since the metal-containing binder has a configuration in which the expansion coefficients are made to be approximately the same, the configuration is simple, and electrode patterns having approximately the same expansion coefficients can be easily formed. Furthermore, since the polyurethane binder can be heat-treated at a relatively low temperature, there is no risk of distortion of the substrate during fixing. Although the resistance of the metal-containing binder is several tens of Ω/cm, which is higher than that of conventional electrode patterns, the resistance between the electrodes of the dew sensor varies in the range of 10 MΩ to 10 KΩ, so there is no problem in practical use. . Furthermore, in this embodiment, a silicon moisture-permeable film is formed to prevent ionic dust from adhering to the dew condensation surface, so that it is possible to eliminate the secular change in dew condensation sensitivity.
よつて本考案によれば、露結検出動作を確実に
し露結感度の経年変化のほとんどない露結センサ
を安価に提供できその効果は大である。 Therefore, according to the present invention, a dew condensation sensor can be provided at a low cost, which ensures reliable dew condensation detection operation and shows almost no change over time in dew condensation sensitivity, and is highly effective.
第１図は本実施例の露結センサの要部断面図、
第２図は電極パターンの形状を示す平面図をそれ
ぞれ顕わす。
主な図番の説明、１……基板（可撓性シート）、
２……電極パターン、４……被膜。
FIG. 1 is a sectional view of the main parts of the dew condensation sensor of this embodiment,
FIG. 2 each shows a plan view showing the shape of the electrode pattern. Explanation of main drawing numbers, 1...Substrate (flexible sheet),
2...Electrode pattern, 4...Coating.
Claims (1)
リウレタン系バインダに金属微粉抹を混入せしめ
た金属含有バインダを前記ポリエステルシート表
面に櫛歯状に印刷形成して定着処理した電極パタ
ーンと、該電極パターンの表面全体を覆う感湿材
層と、該感湿材層を覆う透湿性被膜よりなる露結
センサ。 A polyester sheet whose back surface is an adhesive surface, an electrode pattern obtained by printing and fixing a metal-containing binder, which is a polyurethane binder mixed with fine metal powder, on the surface of the polyester sheet in the form of comb teeth, and the surface of the electrode pattern. A dew condensation sensor consisting of a moisture-sensitive material layer that covers the entire surface and a moisture-permeable coating that covers the moisture-sensitive material layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1979104051U JPS6336267Y2 (en) | 1979-07-26 | 1979-07-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1979104051U JPS6336267Y2 (en) | 1979-07-26 | 1979-07-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5621758U JPS5621758U (en) | 1981-02-26 |
| JPS6336267Y2 true JPS6336267Y2 (en) | 1988-09-27 |
Family
ID=29336749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1979104051U Expired JPS6336267Y2 (en) | 1979-07-26 | 1979-07-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6336267Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6139326Y2 (en) * | 1981-04-09 | 1986-11-11 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS492873A (en) * | 1972-04-22 | 1974-01-11 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5279986U (en) * | 1975-12-10 | 1977-06-15 |
-
1979
- 1979-07-26 JP JP1979104051U patent/JPS6336267Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS492873A (en) * | 1972-04-22 | 1974-01-11 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5621758U (en) | 1981-02-26 |
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