JP2000323301A - Self temperature controlled heating element composition - Google Patents
Self temperature controlled heating element compositionInfo
- Publication number
- JP2000323301A JP2000323301A JP11133924A JP13392499A JP2000323301A JP 2000323301 A JP2000323301 A JP 2000323301A JP 11133924 A JP11133924 A JP 11133924A JP 13392499 A JP13392499 A JP 13392499A JP 2000323301 A JP2000323301 A JP 2000323301A
- Authority
- JP
- Japan
- Prior art keywords
- heating element
- temperature
- self
- composition
- element composition
- 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
- 238000010438 heat treatment Methods 0.000 title claims abstract description 60
- 239000000203 mixture Substances 0.000 title claims abstract description 43
- 229920002589 poly(vinylethylene) polymer Polymers 0.000 claims abstract description 17
- 229920003048 styrene butadiene rubber Polymers 0.000 claims abstract description 12
- 238000002844 melting Methods 0.000 claims abstract description 10
- 230000008018 melting Effects 0.000 claims abstract description 10
- 239000000126 substance Substances 0.000 claims abstract description 6
- 239000013078 crystal Substances 0.000 abstract description 7
- 238000004132 cross linking Methods 0.000 description 13
- 239000010408 film Substances 0.000 description 12
- 229920001971 elastomer Polymers 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 239000011247 coating layer Substances 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000000806 elastomer Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000005062 Polybutadiene Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 229920002857 polybutadiene Polymers 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 3
- 238000010894 electron beam technology Methods 0.000 description 3
- 230000009477 glass transition Effects 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- 229920002799 BoPET Polymers 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- -1 polyethylene terephthalate Polymers 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003849 aromatic solvent Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- QNRMTGGDHLBXQZ-UHFFFAOYSA-N buta-1,2-diene Chemical compound CC=C=C QNRMTGGDHLBXQZ-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000011231 conductive filler Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000011357 graphitized carbon fiber Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Thermistors And Varistors (AREA)
Abstract
(57)【要約】
【課題】 使用温度以上での自己温度制御特性に優れ、
しかもこれを損うことなく使用温度以下での温度変化に
よる電気抵抗の変化が抑制された、自己温度制御発熱体
組成物を提供すること。
【解決手段】 スチレン・ブタジエンゴム、室温よりも
高い結晶融点を有する１，２ポリブタジエン及び導電性
物質を含む組成物を放射線架橋する。これによって発熱
体を構成して、低温下で繰返し電源投入しても過大電流
が流れない面状発熱体が可能となる。
(57) [Abstract] [Problem] Excellent self-temperature control characteristics above the operating temperature,
Moreover, there is provided a self-temperature controlled heating element composition in which a change in electric resistance due to a temperature change below a use temperature is suppressed without impairing this. SOLUTION: A composition containing styrene-butadiene rubber, 1,2 polybutadiene having a crystal melting point higher than room temperature, and a conductive substance is radiation-crosslinked. This makes it possible to form a heating element, and to provide a sheet heating element in which an excessive current does not flow even when the power is repeatedly turned on at a low temperature.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、床・壁暖房等の暖
房器具等における面状発熱体に用いられる自己温度制御
発熱体組成物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-heating element composition used for a sheet heating element in a heating apparatus such as floor / wall heating.
【０００２】[0002]
【従来の技術】暖房器具に用いられる自己温度制御発熱
体組成物においては、温度上昇と共に電気抵抗が上昇
し、発熱量が低下する性能が求められ、製品安全上から
使用温度以上では温度上昇による電気抵抗の上昇が急激
である自己温度制御発熱体組成物が要求される。2. Description of the Related Art In a self-temperature controlled heating element composition used for a heating appliance, it is required that the electric resistance rises as the temperature rises and that the calorific value decreases. There is a need for a self-heating controlled heating element composition with a sharp rise in electrical resistance.
【０００３】他方、使用温度未満の温度範囲において
は、抵抗上昇が緩かである方が望ましい。この理由は、
電源投入時の低温度範囲における電気抵抗が、使用温度
における電気抵抗よりも極端に低い場合には、使用温度
へ温度上昇する迄の間に、過大な電流が流れることとな
り、これによって当該暖房器具等の製品寿命に悪影響を
及ぼすことになるためである。又、製品設計に際して、
使用温度条件における電流に比し、電源投入時に過大な
電流が流れることを想定して構造設計を行うことが必要
となり、製品設計に大きな制約を与えるためである。On the other hand, in a temperature range lower than the operating temperature, it is desirable that the resistance rise is gentle. The reason for this is
If the electric resistance in the low temperature range at the time of turning on the power is extremely lower than the electric resistance at the operating temperature, an excessive current will flow before the temperature rises to the operating temperature, and as a result, the heating appliance This will adversely affect the product life. Also, when designing products,
This is because it is necessary to design the structure assuming that an excessive current flows when the power is turned on as compared with the current under the operating temperature condition, which greatly imposes restrictions on product design.
【０００４】従来のこの種の組成物において、スチレン
・ブタジエンゴム等のガラス転移点の低いゴム・エラス
トマを配合し、これを架橋させたものは、要求される急
激な抵抗上昇を或る程度満たすことができる。又、適正
に架橋された上記組成物においては、長期の連続あるい
は繰り返し荷電を行った場合の抵抗値変化が小さく、要
求される長期安定性を或る程度満たすことが出来る。[0004] In a conventional composition of this type, a rubber or elastomer having a low glass transition point, such as styrene-butadiene rubber, is blended and crosslinked to meet a required rapid increase in resistance to some extent. be able to. In addition, in the above-mentioned composition which is appropriately cross-linked, a change in resistance value when charging is performed for a long time continuously or repeatedly is small, and the required long-term stability can be satisfied to some extent.
【０００５】なお、上記のような組成物から成る薄膜の
面状発熱体を製造する方法としては、架橋前の組成物を
溶媒に溶解して塗料とし、得られた塗料を電極を配設し
たフィルム等へ印刷・塗付して乾燥し、しかる後に電子
線照射、紫外線照射あるいは加熱等により架橋する方法
も採用される。[0005] As a method of producing a sheet-like heating element of a thin film composed of the above composition, a composition before crosslinking is dissolved in a solvent to form a coating, and the obtained coating is provided with electrodes. A method of printing and applying to a film or the like, drying the film, and then crosslinking by electron beam irradiation, ultraviolet irradiation, heating or the like is also adopted.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、低いガ
ラス転移点を持つゴム・エラストマ類を配合成分とする
発熱体組成物は、低温域においても、温度変化による電
気抵抗変化が大きいという欠点があった。例えば、従来
におけるスチレン・ブタジエンゴム系の自己温度制御発
熱体組成物のある種の物においては、０℃と４０℃の電
気抵抗値に１０倍以上の差があるが、これを寒冷地にお
ける、床、壁暖房用の面状発熱体として使用した場合に
は、室温が０℃又はそれ以下の温度である時に電源を投
入したとすれば、使用温度条件における電流の１０倍以
上の電流が流れることとなり、製品について長期の信頼
性を得るためには、かかる過大な電流に耐え得る構造と
することが必要となるので、製品設計上、製品製造上の
困難な制約となっていた。However, a heating element composition containing a rubber / elastomer having a low glass transition point has a drawback that a large change in electric resistance due to a temperature change is caused even in a low temperature range. . For example, in some conventional styrene-butadiene rubber-based self-temperature control heating element compositions, there is a difference of 10 times or more in electrical resistance between 0 ° C. and 40 ° C. When used as a planar heating element for floor and wall heating, if the power is turned on when the room temperature is 0 ° C. or lower, a current that is 10 times or more the current at the operating temperature condition flows. That is, in order to obtain long-term reliability of a product, it is necessary to have a structure capable of withstanding such an excessive current, which has been a difficult constraint in product design and product manufacturing.
【０００７】本発明の目的は、スチレン・ブタジエンゴ
ム等と導電性物質等の配合物を架橋せしめた自己温度制
御発熱体組成物であって、使用温度以上での自己温度制
御特性に優れ、しかもこれを損うことなく使用温度以下
での温度変化による電気抵抗の変化が抑制された発熱体
組成物を提供し、これによって、繰返して低温下で電源
投入した場合においても、過大な電流が流れることが防
止された自己温度制御発熱体を提供することにある。An object of the present invention is to provide a self-temperature controlled heating element composition obtained by crosslinking a mixture of a styrene / butadiene rubber or the like and a conductive substance or the like. Provided is a heating element composition in which a change in electric resistance due to a temperature change below a use temperature is suppressed without impairing this, whereby an excessive current flows even when the power is repeatedly turned on at a low temperature. It is an object of the present invention to provide a self-temperature controlled heating element in which the occurrence of the heat is prevented.
【０００８】[0008]
【課題を解決するための手段】本発明による自己温度制
御発熱体組成物は、スチレン・ブタジエンゴムと１，２
ポリブタジエンと導電性物質とを含有する組成物を放射
線架橋したものである。The self-heating controlling composition according to the present invention comprises styrene-butadiene rubber and 1,2
It is obtained by radiation-crosslinking a composition containing polybutadiene and a conductive substance.
【０００９】本発明にける組成物は、スチレン・ブタジ
エンゴム、１，２ブタジエン及び導電性物質等の組成成
分を、配合、混練する等して製造される。The composition of the present invention is produced by blending and kneading components such as styrene / butadiene rubber, 1,2 butadiene and a conductive substance.
【００１０】本発明に用いられるスチレン・ブタジエン
ゴムとしては、乳化重合スチレン・ブタジエンゴム、溶
液重合スチレン・ブタジエンゴムが挙げられるが、放射
線架橋における架橋性が優れるために、溶液重合スチレ
ン・ブタジエンゴムを使用するのが好ましい。Examples of the styrene-butadiene rubber used in the present invention include emulsion-polymerized styrene-butadiene rubber and solution-polymerized styrene-butadiene rubber. It is preferred to use.
【００１１】本発明に用いられる１，２ポリブタジエン
としては、スチレン・ブタジエンに相溶し、室温より高
温域に結晶融点を持つエラストマとしての１，２ポリブ
タジエンが挙げられる。The 1,2 polybutadiene used in the present invention includes 1,2 polybutadiene as an elastomer which is compatible with styrene / butadiene and has a crystalline melting point in a region higher than room temperature.
【００１２】本発明における、１，２ポリブタジエンの
結晶融点は、６０℃〜１１０℃の範囲内とすることが好
ましい。その理由は、１，２ポリブタジエンに、その結
晶融点の２０℃〜３０℃下の温度まで電気抵抗の上昇を
抑える働きがあり、上記の如き結晶融点を有する１，２
ポリブタジエンを使用することによって、暖房器具用発
熱体としての使用温度である３０℃〜８０℃まで電気抵
抗の上昇を抑えることが出来るためである。なお、かか
る説明からも理解される如く、１，２ポリブタジエンの
結晶融点を選択・決定することによって、目的とする暖
房器具等の発熱体の使用温度を設定・制御することが出
来る。In the present invention, the crystalline melting point of 1,2 polybutadiene is preferably in the range of 60 ° C. to 110 ° C. The reason is that 1,2 polybutadiene has a function of suppressing an increase in electric resistance to a temperature 20 ° C. to 30 ° C. below the crystal melting point, and 1,2 polybutadiene having a crystal melting point as described above has
This is because by using polybutadiene, it is possible to suppress an increase in electric resistance to 30 ° C. to 80 ° C., which is a use temperature as a heating element for a heating appliance. As will be understood from this description, by selecting and determining the crystal melting point of 1,2 polybutadiene, it is possible to set and control the intended use temperature of a heating element such as a heating appliance.
【００１３】本発明の自己温度制御発熱体組成物におい
ては、スチレン・ブタジエンゴムと１，２ポリブタジエ
ンの割合を、両者の合量（重量）を基準として、スチレ
ン・ブタジエンゴム８０〜１０重量％、１，２ポリブタ
ジエン２０〜９０重量％とすることが好ましい。In the self-heating composition according to the present invention, the ratio of styrene-butadiene rubber to 1,2 polybutadiene is set to 80 to 10% by weight based on the total amount (weight) of both. Preferably, the content of 1,2 polybutadiene is 20 to 90% by weight.
【００１４】本発明における、１，２ポリブタジエンの
配合割合は、組成物における上記スチレン・ブタシエン
ゴムと１，２ポリブタジエンの合量（重量）に対して２
０〜９０重量％の範囲とすることが好ましいが、その理
由は、２０重量％以下では、温度上昇による電気抵抗の
上昇を抑制する効果が顕著でなく、又、９０重量％以上
では、使用温度以上での電気抵抗変化が十分な大きさと
ならず、ＰＴＣ性が過小となるためである。In the present invention, the mixing ratio of 1,2 polybutadiene is 2 to the total amount (weight) of the styrene-butadiene rubber and 1,2 polybutadiene in the composition.
The range is preferably 0 to 90% by weight. The reason is that at 20% by weight or less, the effect of suppressing an increase in electric resistance due to temperature rise is not remarkable. This is because the change in electric resistance does not become sufficiently large, and the PTC property becomes too small.
【００１５】本発明における導電性物質としては、各種
の微細導電性充填剤が含まれるが、好適実施例において
使用される炭素系導電性物質として、グラファイト、グ
ラファイト化カーボンファイバが挙げられる。The conductive material in the present invention includes various fine conductive fillers. Examples of the carbon-based conductive material used in the preferred embodiment include graphite and graphitized carbon fiber.
【００１６】本発明における放射線架橋方法として、各
種の架橋法が含まれるが、好適実施例において、電子線
照射架橋が挙げられる。The radiation crosslinking method in the present invention includes various crosslinking methods, and preferred examples include electron beam irradiation crosslinking.
【００１７】[0017]
【発明の実施の形態】以下、本発明の実施の形態例を添
付図面を参照しつつ説明し、次いで実施例について説明
する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings, and then embodiments will be described.
【００１８】図１は、本発明の自己温度制御発熱体組成
物を使用した試験用面状発熱体の横断面概略図である。FIG. 1 is a schematic cross-sectional view of a test sheet heating element using the self-temperature controlled heating element composition of the present invention.
【００１９】図１に示される如く、ＰＥＴ（ポリエチレ
ンテレフタレート）フィルム１上に、電極２が配設さ
れ、さらにその上に本発明による自己温度制御発熱体組
成物から成る発熱体３が設けられることによって試験用
面状発熱体が構成される。その製造工程の概略は、ＰＥ
Ｔフィルム１上に電極２を配設する工程、電極２を配設
されたＰＥＴフィルム１上に架橋前の状態の発熱体組成
物による被覆層を形成し、次いで架橋処理して架橋され
た状態にある自己温度制御発熱体組成物による被覆層と
して発熱体３を形成する工程によって実施することが出
来、その詳細は下記の実施例中に示される。As shown in FIG. 1, an electrode 2 is provided on a PET (polyethylene terephthalate) film 1, and a heating element 3 made of a self-temperature controlling heating element composition according to the present invention is further provided thereon. This forms a test sheet heating element. The outline of the manufacturing process is PE
Step of disposing electrodes 2 on T film 1, forming a coating layer of a heating element composition in a state before crosslinking on PET film 1 on which electrodes 2 are disposed, and then performing a crosslinking treatment to form a crosslinked state The process can be carried out by forming the heating element 3 as a coating layer using the self-temperature-controlling heating element composition described in Example 1 below.
【００２０】本発明による自己温度制御発熱体組成物に
おいては、結晶融点を有する１，２ポリブタジエンが必
須の配合成分とされ、これによって、低温側での温度変
化による電気抵抗の過大変化が防止される。In the self-temperature controlled heating element composition according to the present invention, 1,2 polybutadiene having a crystal melting point is an essential compounding component, thereby preventing an excessive change in electric resistance due to a temperature change on a low temperature side. You.
【００２１】即ち、従来におけるゴム・エラストマ発熱
体組成物においては、ガラス転移点が低いため、使用温
度（３０〜８０℃）以下の温度においても熱膨張が起こ
るので、これによる電気抵抗の変化が現れる。これに対
して、結晶融点を持つエラストマである１，２ポリブタ
ジエンを配合・混合することによって、融点の数十℃低
温までの温度範囲においては、結晶によって熱膨張が抑
えられることによって、温度変化による抵抗変化が防止
される。That is, in the conventional rubber / elastomer heating element composition, since the glass transition point is low, thermal expansion occurs even at a temperature lower than the operating temperature (30 to 80 ° C.). appear. On the other hand, by blending and mixing 1,2 polybutadiene, which is an elastomer having a crystal melting point, in the temperature range up to several tens of degrees Celsius lower than the melting point, the thermal expansion is suppressed by the crystal, and the Resistance change is prevented.
【００２２】[0022]
【実施例】実施例１，２及び比較例１，２について、表
１及び図１を参照しつつ、以下に説明する。EXAMPLES Examples 1 and 2 and Comparative Examples 1 and 2 will be described below with reference to Table 1 and FIG.
【００２３】（１）塗料の製造：表１に示す配合割合
（重量部、ｐｈｒ）の配合成分１００重量部に対して、
芳香族系溶剤（ＹＳ−１００，山一化学工業（株）製）
を４００重量部加えて攪拌、溶解し、次いで塗料用三本
ロール混練機を使用し、混練、分散して発熱体組成物塗
料とした。(1) Production of paint: 100 parts by weight of the components shown in Table 1 (parts by weight, phr)
Aromatic solvent (YS-100, manufactured by Yamaichi Chemical Industry Co., Ltd.)
Was added and stirred, dissolved, and then kneaded and dispersed using a three-roll kneader for coating to obtain a heating element composition coating.
【００２４】（２）電極配設フィルムの製造：１００μ
ｍ厚のポリエチレンテレフタレート（ＰＥＴ）フィルム
に、エポキシ樹脂をバインダーとした銀の電極塗料を用
い、スクリーン印刷によって電極を印刷し、次いで１２
５℃、１５分間加熱硬化させて、電極２が配設されたフ
ィルム１とした。(2) Production of electrode-provided film: 100 μm
An electrode is printed by screen printing on a polyethylene terephthalate (PET) film having a thickness of m using a silver electrode paint using an epoxy resin as a binder.
The film was cured by heating at 5 ° C. for 15 minutes to obtain a film 1 on which the electrode 2 was provided.
【００２５】（３）架橋前の状態の発熱体組成物による
被覆層の形成：上に得られた電極配設フィルムに、上に
得られた発熱体組成物塗料を、スクリーン印刷によって
印刷し、次いで８０℃、１０分間乾燥した。(3) Formation of a coating layer using the heating element composition in a state before cross-linking: The heating element composition coating obtained above is printed by screen printing on the electrode disposition film obtained above, Then, it was dried at 80 ° C. for 10 minutes.
【００２６】（４）架橋発熱体組成物による被覆層の形
成：架橋前の状態の発熱体組成物による被覆層を形成さ
れた電極配設フィルムを、線量２０Ｍｒａｄ、加速電圧
１２０ｋＶ、ビーム電流５ｍＡの条件で電子線照射架橋
処理して、架橋発熱体組成物による被覆層から成る発熱
体３が形成された電極配設フィルムとし、試験用面状発
熱体を得た。(4) Formation of coating layer with crosslinked heating element composition: The electrode-arranged film on which the coating layer was formed of the heating element composition before crosslinking was applied at a dose of 20 Mrad, an acceleration voltage of 120 kV, and a beam current of 5 mA. Under the conditions, the film was subjected to electron beam irradiation cross-linking to form an electrode-arranged film on which a heating element 3 formed of a coating layer of a cross-linking heating element composition was formed, to obtain a test sheet heating element.
【００２７】（５）評価試験：上に得られた試験用面状
発熱体における架橋発熱体組成物について、０℃、４０
℃、６０℃及び８０℃における抵抗値Ｒ0 、Ｒ40、Ｒ60
及びＲ80を測定し、抵抗率変化率としてＲ40／Ｒ0 、Ｒ
60／Ｒ0 及びＲ80／Ｒ0 を算出し、抵抗率変化率によっ
て評価を行った。なお、抵抗率の測定は、恒温槽を用い
て、試験体温度が所定温度になってから３０分後に行っ
た。(5) Evaluation test: The crosslinked heating element composition in the test sheet heating element obtained above was tested at 0 ° C and 40 ° C.
Resistance values R 0 , R 40 , R 60 at 60 ° C., 60 ° C. and 80 ° C.
And measuring the R 80, R 40 / R 0 as the resistance change rate, R
60 / R0 and R80 / R0 were calculated and evaluated by the rate of change in resistivity. The measurement of the resistivity was performed 30 minutes after the temperature of the test piece reached a predetermined temperature using a thermostat.
【００２８】実施例１、２及び比較例１、２の評価試験
の結果は、表１中に示される。The results of the evaluation tests of Examples 1 and 2 and Comparative Examples 1 and 2 are shown in Table 1.
【００２９】[0029]
【表１】 [Table 1]
【００３０】表１中に示される如く、本発明の実施例１
及び２の場合においては、Ｒ40／Ｒ0 の値が２．４〜
３．５と充分に低く、且つ、Ｒ80／Ｒ0 の値が５２０〜
６３０と充分に高く、必要なＰＴＣ特性が得られること
が判る。As shown in Table 1, Example 1 of the present invention
And in the case of 2, the value of R 40 / R 0 is 2.4 to
It is sufficiently low as 3.5, and the value of R 80 / R 0 is 520 to
630, which indicates that the required PTC characteristics can be obtained.
【００３１】同様に、比較例１の場合には、Ｒ40／Ｒ0
が１７と高く、過大であり、又、比較例２の場合には、
Ｒ80／Ｒ0 が１０．５と低く、過小であり、必要なＰＴ
Ｃ特性が得られることが判る。Similarly, in the case of Comparative Example 1, R 40 / R 0
Is as high as 17 and excessive, and in the case of Comparative Example 2,
R 80 / R 0 is as low as 10.5, which is too small, and the required PT
It can be seen that C characteristics can be obtained.
【００３２】以上の如く、本発明の実施例においては、
使用温度以下における、温度変化による電気抵抗変化が
充分抑制された自己温度制御発熱体組成物が可能とな
り、製品設計上、製造上の制約を受けることなく、優れ
た信頼性を有する自己温度制御発熱体組成物から成る発
熱体を具備する製品を得ることができた。As described above, in the embodiment of the present invention,
A self-temperature controlled heating element composition in which the change in electrical resistance due to temperature change is sufficiently suppressed at a temperature lower than the operating temperature becomes possible. A product having a heating element composed of the body composition was obtained.
【００３３】[0033]
【発明の効果】以上要するに本発明によれば、自己温度
制御特性に優れ、しかも、低温側においては温度変化に
よる電気抵抗変化が抑制された自己温度制御発熱体組成
物が可能となる。これによって、応用製品の設計上、製
造上の制約を受ける事なく、優れた信頼性を有する暖房
器具等が提供される。As described above, according to the present invention, a self-temperature controlled heating element composition having excellent self-temperature control characteristics and suppressing a change in electric resistance due to a temperature change at a low temperature can be obtained. Thus, a heating appliance or the like having excellent reliability is provided without being restricted by the design and manufacturing of the applied product.
【図１】本発明の自己温度制御発熱体組成物より成る発
熱体を有する試験用面状発熱体の横断面概略図である。FIG. 1 is a schematic cross-sectional view of a test sheet heating element having a heating element made of a self-temperature control heating element composition of the present invention.
１ ＰＥＴフィルム ２ 電極 ３ 発熱体 1 PET film 2 Electrode 3 Heating element
───────────────────────────────────────────────────── フロントページの続き (72)発明者 松栄 豊和 茨城県日立市日高町５丁目１番１号 日立 電線株式会社日高工場内 Ｆターム(参考） 5E034 AA08 AB01 AC10 DA02 DC03 DC05 DE05 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Toyokazu Matsue 5-1-1, Hidaka-cho, Hitachi-shi, Ibaraki F-term in the Hidaka Plant of Hitachi Cable, Ltd. (reference) 5E034 AA08 AB01 AC10 DA02 DC03 DC05 DE05
Claims (3)
ブタジエンと導電性物質とを含有する組成物を放射線架
橋したことを特徴とする自己温度制御発熱体組成物。1. A self-heating element composition comprising a composition containing styrene-butadiene rubber, 1,2 polybutadiene and a conductive substance, which is radiation-crosslinked.
ジエンゴムと上記１，２ポリブタジエンの割合が、両者
の合量（重量）を基準として、スチレン・ブタジエンゴ
ム８０〜１０重量％対１，２ポリブタジエン２０〜９０
重量％であることを特徴とする請求項１記載の自己温度
制御発熱体組成物。2. The composition according to claim 1, wherein the ratio of the styrene-butadiene rubber and the 1,2 polybutadiene is 80 to 10% by weight of the styrene-butadiene rubber to 1,2 polybutadiene based on the total amount (weight) of the two. ~ 90
2. The self-heating element composition according to claim 1, wherein the composition is by weight.
が、６０〜１１０℃であることを特徴とする請求項１又
は２記載の自己温度制御発熱体組成物。3. The heating element composition according to claim 1, wherein the 1,2 polybutadiene has a crystalline melting point of 60 to 110 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11133924A JP2000323301A (en) | 1999-05-14 | 1999-05-14 | Self temperature controlled heating element composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11133924A JP2000323301A (en) | 1999-05-14 | 1999-05-14 | Self temperature controlled heating element composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000323301A true JP2000323301A (en) | 2000-11-24 |
Family
ID=15116281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11133924A Pending JP2000323301A (en) | 1999-05-14 | 1999-05-14 | Self temperature controlled heating element composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000323301A (en) |
-
1999
- 1999-05-14 JP JP11133924A patent/JP2000323301A/en active Pending
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