JP2015215959A - Planar heating element - Google Patents

Planar heating element Download PDF

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JP2015215959A
JP2015215959A JP2014096546A JP2014096546A JP2015215959A JP 2015215959 A JP2015215959 A JP 2015215959A JP 2014096546 A JP2014096546 A JP 2014096546A JP 2014096546 A JP2014096546 A JP 2014096546A JP 2015215959 A JP2015215959 A JP 2015215959A
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heating element
planar heating
resistor
element according
conductive resin
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良 藤堂
Makoto Todo
良 藤堂
林 正彦
Masahiko Hayashi
正彦 林
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Teijin Frontier Co Ltd
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Teijin Frontier Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a planar heating element which is rich in flexibility and whose resistance value is stable even at a low voltage.SOLUTION: Disclosed is a planar heating element in which a conductive resin and a resistor are printed on at least one surface of the front or the back of woven fabric. In this planar heating element, polyester fiber is contained as the woven fabric and the woven fabric whose cover factor CF is 1,000 to 3,000 is used.

Description

本発明は、フレキシブル性に富み、かつ低電圧でも安定した抵抗値を維持できる面状発熱体に関する。   The present invention relates to a planar heating element that is flexible and can maintain a stable resistance value even at a low voltage.

従来、生地に通電性樹脂および抵抗体を印刷した面状発熱体として、種々の生地を用いたものが提案されている(例えば、特許文献1、特許文献2、特許文献3参照)。
しかしながら、生地としてフィルムを用いたものではフレキシブル性に劣るという問題があった。また、生地として不織布を用いたものでは表面毛羽により抵抗値が安定しないという問題があった。また、生地を構成する繊維として綿を用いたものでは、通電性樹脂や抵抗体を生地に印刷する際に生地内部まで浸透し生地が硬くなってフレキシブル性に劣るという問題があった。
Conventionally, as a sheet heating element in which a conductive resin and a resistor are printed on a cloth, those using various cloths have been proposed (for example, see Patent Document 1, Patent Document 2, and Patent Document 3).
However, there is a problem that a film using a fabric is inferior in flexibility. Moreover, in the thing using the nonwoven fabric as cloth, there existed a problem that resistance value was not stabilized by surface fluff. Further, in the case of using cotton as a fiber constituting the cloth, there is a problem that when the conductive resin or the resistor is printed on the cloth, the cloth penetrates into the cloth and the cloth becomes hard and inferior in flexibility.

特開2003−264052号公報JP 2003-264052 A 特開2003−257597号公報JP 2003-257597 A 特開2002−313541号公報Japanese Patent Laid-Open No. 2002-313541

本発明は上記の背景に鑑みなされたものであり、その目的は、フレキシブル性に富み、かつ低電圧でも安定した抵抗値を維持できる面状発熱体を提供することにある。   The present invention has been made in view of the above-described background, and an object thereof is to provide a planar heating element that is rich in flexibility and can maintain a stable resistance value even at a low voltage.

本発明者は上記の課題を達成するため鋭意検討した結果、ポリエステル繊維を用いて特定のカバーファクターを有する織物を得て、該織物を生地として面状発熱体を得ると、フレキシブル性に富み、かつ低電圧でも安定した抵抗値を維持できる面状発熱体が得られることを見出し、さらに鋭意検討を重ねることにより本発明を完成するに至った。   As a result of intensive studies to achieve the above-mentioned problems, the present inventors have obtained a woven fabric having a specific cover factor using polyester fibers, and obtained a sheet-shaped heating element using the woven fabric as a fabric. In addition, the present inventors have found that a planar heating element capable of maintaining a stable resistance value even at a low voltage can be obtained, and further earnestly studied to complete the present invention.

かくして、本発明によれば「織物の少なくともどちらか一面に通電性樹脂および抵抗体が印刷されてなる面状発熱体であって、前記織物がポリエステル繊維を含み、かつ該生地が下記式で定義するカバーファクターCFが1,000〜3,000の織物であることを特徴とする面状発熱体。」が提供される。
CF=(DWp/1.1)1/2×MWp+(DWf/1.1)1/2×MWf
ただし、DWpは経糸総繊度(dtex)、MWpは経糸織密度(本/2.54cm)、DWfは緯糸総繊度(dtex)、MWfは緯糸織密度(本/2.54cm)である。
Thus, according to the present invention, “a sheet heating element in which a conductive resin and a resistor are printed on at least one surface of a fabric, the fabric includes polyester fibers, and the fabric is defined by the following formula: The sheet heating element is characterized by being a woven fabric having a cover factor CF of 1,000 to 3,000. "
CF = (DWp / 1.1) 1/2 × MWp + (DWf / 1.1) 1/2 × MWf
However, DWp is the total warp fineness (dtex), MWp is the warp weave density (main / 2.54 cm), DWf is the total weft fineness (dtex), and MWf is the weft weave density (main / 2.54 cm).

その際、前記ポリエステル繊維が長繊維であることが好ましい。また、前記ポリエステル繊維において、艶消し剤がポリマー重量対比0.1重量%以上含まれることが好ましい。また、前記ポリエステル繊維において、単繊維繊度が10dtex以下であることが好ましい。また、前記通電性樹脂において抵抗値が10−4Ω/cm以下であることが好ましい。また、前記通電性樹脂が、銀または銅を含むことが好ましい。また、前記抵抗体の抵抗値が5kΩ/cm以上の固定抵抗を有することが好ましい。また、前記抵抗体がカーボンを含むことを好ましい。また、前記通電性樹脂が、櫛歯状パターンで織物の少なくともどちらか一面に印刷されていることが好ましい。また、前記通電性樹脂および抵抗体の上にウレタン樹脂が積層されていることが好ましい。 In that case, it is preferable that the said polyester fiber is a long fiber. Moreover, it is preferable that the said polyester fiber contains a matting agent 0.1weight% or more with respect to a polymer weight. Moreover, in the said polyester fiber, it is preferable that a single fiber fineness is 10 dtex or less. In the conductive resin, the resistance value is preferably 10 −4 Ω / cm 2 or less. The conductive resin preferably contains silver or copper. Moreover, it is preferable that the resistance value of the resistor has a fixed resistance of 5 kΩ / cm 2 or more. Moreover, it is preferable that the said resistor contains carbon. The conductive resin is preferably printed on at least one side of the woven fabric in a comb-like pattern. Moreover, it is preferable that a urethane resin is laminated on the conductive resin and the resistor.

本発明によれば、フレキシブル性に富み、かつ低電圧でも安定した抵抗値を維持できる面状発熱体が得られる。   According to the present invention, a planar heating element which is rich in flexibility and can maintain a stable resistance value even at a low voltage can be obtained.

実施例1で得られた面状発熱体の縦断面図である。2 is a longitudinal sectional view of a planar heating element obtained in Example 1. FIG. 通電性樹脂の印刷パターンとして採用できる櫛歯状パターンを模式的に示す図である。It is a figure which shows typically the comb-tooth pattern which can be employ | adopted as a printing pattern of electroconductive resin. 実施例1で用いた、通電性樹脂と抵抗体の印刷パターンを示す図である。該図において、通電性樹脂は、図2と同じ櫛歯状パターンと該櫛歯状パターンを左右反転させ位置をずらせたパターンで印刷され、その上に抵抗体が印刷されている。It is a figure which shows the printing pattern of electroconductive resin and a resistor used in Example 1. FIG. In the figure, the conductive resin is printed in the same comb-tooth pattern as in FIG. 2 and a pattern in which the comb-tooth pattern is reversed left and right and shifted in position, and a resistor is printed thereon.

以下、本発明の実施の形態について詳細に説明する。
まず、本発明の面状発熱体は、生地の少なくともどちらか一面に通電性樹脂および抵抗体が印刷されてなる面状発熱体であって、前記生地がポリエステル繊維を含む。
Hereinafter, embodiments of the present invention will be described in detail.
First, the sheet heating element of the present invention is a sheet heating element in which a conductive resin and a resistor are printed on at least one surface of a cloth, and the cloth includes polyester fibers.

(ポリエステル繊維)
前記ポリエステル繊維はジカルボン酸成分とジグリコール成分とから製造される。ジカルボン酸成分としては、主としてテレフタル酸が用いられることが好ましく、グリコール成分としては主としてエチレングリコール、トリメチレングリコール及びテトラメチレングリコールから選ばれた1種以上のアルキレングリコールを用いることが好ましい。
また、ポリエステル樹脂には、前記ジカルボン酸成分及びグリコール成分の他に第3成分を含んでいてもよい。該第3成分としては、カチオン染料可染性アニオン成分、例えば、ナトリウムスルホイソフタル酸;テレフタル酸以外のジカルボン酸、例えばイソフタル酸、ナフタレンジカルボン酸、アジピン酸、セバシン酸;及びアルキレングリコール以外のグリコール化合物、例えばジエチレングリコール、ポリエチレングリコール、ビスフェノールA、ビスフェノールスルフォンの1種以上を用いることができる。かかるポリエステルとしては、マテリアルリサイクルまたはケミカルリサイクルされたポリエステルや、バイオマスすなわち生物由来の物質を原材料として得られたモノマー成分を使用してなるポリエチレンテレフタレート、ポリ乳酸、ステレオコンプレックスポリ乳酸であってもよい。さらには、特開2004−270097号公報や特開2004−211268号公報に記載されているような、特定のリン化合物およびチタン化合物を含む触媒を用いて得られたポリエステルでもよい。
ポリエステル繊維を形成するポリマー中には、艶消し剤、抗菌剤、微細孔形成剤、カチオン染料可染剤、着色防止剤、熱安定剤、蛍光増白剤、着色剤、吸湿剤、無機微粒子が1種または2種以上含まれていてもよい。例えば、ポリマー中に含まれるポリマー中に艶消し剤(二酸化チタン)を含ませ、セミダルポリエステルまたはフルダルポリエステルとすると、防透性が向上し、例えば、通電性樹脂および抵抗体が印刷されている面の上にかかる防透性の生地を積層すると、外部から通電性樹脂および抵抗体が見えにくくなるため外観性が向上し好ましい。その際、艶消し剤の含有量としてはポリマー重量対比0.1重量%以上(より好ましくは0.2〜2.0重量%)であることが好ましい。
(Polyester fiber)
The polyester fiber is produced from a dicarboxylic acid component and a diglycol component. It is preferable that terephthalic acid is mainly used as the dicarboxylic acid component, and it is preferable to use one or more alkylene glycols selected from ethylene glycol, trimethylene glycol and tetramethylene glycol as the glycol component.
Moreover, the polyester resin may contain a third component in addition to the dicarboxylic acid component and the glycol component. Examples of the third component include cationic dye dyeable anion components such as sodium sulfoisophthalic acid; dicarboxylic acids other than terephthalic acid such as isophthalic acid, naphthalenedicarboxylic acid, adipic acid, sebacic acid; and glycol compounds other than alkylene glycol. For example, one or more of diethylene glycol, polyethylene glycol, bisphenol A, and bisphenol sulfone can be used. Such polyester may be material recycled or chemically recycled polyester, or polyethylene terephthalate, polylactic acid, or stereocomplex polylactic acid using a monomer component obtained using biomass, that is, a biological material as a raw material. Furthermore, the polyester obtained using the catalyst containing the specific phosphorus compound and titanium compound which are described in Unexamined-Japanese-Patent No. 2004-270097 and 2004-21268 may be sufficient.
In the polymer forming the polyester fiber, matting agent, antibacterial agent, micropore forming agent, cationic dye dyeing agent, anti-coloring agent, heat stabilizer, fluorescent brightening agent, coloring agent, hygroscopic agent, inorganic fine particles 1 type or 2 or more types may be contained. For example, if a matting agent (titanium dioxide) is included in the polymer contained in the polymer and the semi-dal polyester or full-dal polyester is used, the permeation resistance is improved, for example, a conductive resin and a resistor are printed. It is preferable to laminate a permeation-proof fabric on the surface, since the conductive resin and the resistor are hardly visible from the outside, so that the appearance is improved. At that time, the content of the matting agent is preferably 0.1% by weight or more (more preferably 0.2 to 2.0% by weight) relative to the polymer weight.

前記ポリエステル繊維の形状としては、短繊維でもよいし長繊維(マルチフィラメント)でもよいが、生地の表面をフラットにし安定した抵抗値を得る上で長繊維であることが好ましい。短繊維(紡績糸)の場合、表面毛羽により抵抗値が安定しないおそれがある。
その際、長繊維(マルチフィラメント)において、単繊維繊度、総繊度、単糸数は、単繊維繊度10.0dtex以下(より好ましくは0.001〜10.0dtex)、総繊度20〜500dtex(より好ましくは100〜400dtex)、単糸数10〜200本(より好ましくは30〜200本)の範囲であることが好ましい。
また、前記ポリエステル繊維において、単繊維の断面形状には制限はなく、通常の円形断面のほかに三角、扁平、特開2004−52167号公報に記載のくびれ付扁平、十字形、六様形、あるいは中空形などの異型断面形状であってもよい。
The shape of the polyester fiber may be a short fiber or a long fiber (multifilament), but is preferably a long fiber in order to obtain a stable resistance value by flattening the surface of the fabric. In the case of a short fiber (spun yarn), the resistance value may not be stabilized due to surface fluff.
At that time, in the long fiber (multifilament), the single fiber fineness, the total fineness, and the number of single yarns are 10.0 dtex or less (more preferably 0.001 to 10.0 dtex), and the total fineness 20 to 500 dtex (more preferably). Is preferably in the range of 100 to 400 dtex) and 10 to 200 single yarns (more preferably 30 to 200 yarns).
Further, in the polyester fiber, there is no limitation on the cross-sectional shape of the single fiber, in addition to the normal circular cross-section, triangular, flat, flattened with constriction described in JP-A-2004-52167, cruciform, hexagonal, Alternatively, it may be an irregular cross-sectional shape such as a hollow shape.

また、前記の生地において、下記式で定義するカバーファクターCFが1,000〜3,000の織物であることが肝要である。該カバーファクターCFが1,000より小さいと、通電性樹脂や抵抗体を生地に印刷する際、織物の反対面まで透過するおそれがあり好ましくない。逆に、該カバーファクターCFよりも大きいとフレキシブル性が損なわれるおそれがあり好ましくない。
CF=(DWp/1.1)1/2×MWp+(DWf/1.1)1/2×MWf
ただし、DWpは経糸総繊度(dtex)、MWpは経糸織密度(本/2.54cm)、DWfは緯糸総繊度(dtex)、MWfは緯糸織密度(本/2.54cm)である。
織物の組織としては、平織、綾織、朱子織等の三原組織、変化組織、たて二重織、よこ二重織等の片二重組織、たてビロードなど特に限定されないが、生地表面をフラットにして低電圧でも安定した抵抗値を得る上で平織が好ましい。
In addition, it is important that the fabric is a woven fabric having a cover factor CF defined by the following formula of 1,000 to 3,000. When the cover factor CF is smaller than 1,000, there is a possibility that the conductive resin or the resistor may penetrate to the opposite surface of the fabric when printing on the fabric. On the contrary, if it is larger than the cover factor CF, flexibility may be impaired, which is not preferable.
CF = (DWp / 1.1) 1/2 × MWp + (DWf / 1.1) 1/2 × MWf
However, DWp is the total warp fineness (dtex), MWp is the warp weave density (main / 2.54 cm), DWf is the total weft fineness (dtex), and MWf is the weft weave density (main / 2.54 cm).
The structure of the woven fabric is not particularly limited, such as a plain weave, twill weave, satin weave, etc., changed structure, warp double weave, half double weave double weave, warp velvet, etc. In order to obtain a stable resistance value even at a low voltage, plain weave is preferable.

(通電性樹脂および抵抗体)
本発明の面状発熱体において、織物の少なくともどちらか一面に通電性樹脂および抵抗体が印刷されている。通電性樹脂および抵抗体は生地の両面に印刷されていてもよいが、片面に印刷されていることが好ましい。また、通電性樹脂および抵抗体は生地に直接印刷してもよいし、間接的に印刷してもよい。
例えば、織物に樹脂を積層し、その上に通電性樹脂および抵抗体を印刷すると、織物の反対面まで透過することがなく好ましい。その際、樹脂としてはウレタン樹脂が、面状発熱体のフレキシブル性が損なわれず好ましい。
前記通電性樹脂としては、抵抗値が10−4Ω/cm以下(より好ましくは1×10−6〜1×10−4Ω/cm)である樹脂が好ましい。かかる導電性樹脂としては銀ペーストや銅ペーストなど銀または銅を含むものが好ましい。市販のものでは、藤倉化成(株)製「ドータイト」(商品名)が好ましい。
(Conductive resin and resistor)
In the sheet heating element of the present invention, a conductive resin and a resistor are printed on at least one surface of the fabric. The conductive resin and the resistor may be printed on both sides of the cloth, but are preferably printed on one side. Further, the conductive resin and the resistor may be printed directly on the cloth or indirectly.
For example, it is preferable to laminate a resin on a woven fabric and print a conductive resin and a resistor on the resin without transmitting to the opposite surface of the woven fabric. At that time, urethane resin is preferable as the resin because the flexibility of the planar heating element is not impaired.
As the conductive resin, a resin having a resistance value of 10 −4 Ω / cm 2 or less (more preferably 1 × 10 −6 to 1 × 10 −4 Ω / cm 2 ) is preferable. As such conductive resin, those containing silver or copper such as silver paste and copper paste are preferable. Among commercially available products, “Dotite” (trade name) manufactured by Fujikura Kasei Co., Ltd. is preferable.

また、前記抵抗体としては、抵抗値が5kΩ/cm以上(より好ましくは5〜50kΩ/cm)の固定抵抗を有する抵抗体が好ましい。かかる抵抗体として正の温度−抵抗値特性(PTC特性)を有するものでもよいが、固定抵抗を有する抵抗体であると、低電圧でも温度が安定し一定温度以上にならないため好ましい。
その際、抵抗体がカーボンを含むことが好ましい。市販のものでは、藤倉化成(株)製「カーボンドータイト」(商品名)が好ましい。
Further, as the resistor, the resistor whose resistance value has a fixed resistance of 5 k.OMEGA / cm 2 or more (more preferably 5~50kΩ / cm 2) is preferred. Such a resistor may have a positive temperature-resistance characteristic (PTC characteristic), but a resistor having a fixed resistance is preferable because the temperature is stable even at a low voltage and does not exceed a certain temperature.
In that case, it is preferable that a resistor contains carbon. Among commercially available products, “Carbon Dotite” (trade name) manufactured by Fujikura Kasei Co., Ltd. is preferable.

ここで、前記通電性樹脂が、図2に示すように櫛歯状パターンで織物の少なくともどちらか一面に印刷されていることが好ましい。
また、前記通電性樹脂および抵抗体の上にウレタン樹脂が積層されているとフレキシブル性を損なうことなく絶縁性が得られ好ましい。
その際、積層の順としては、例えば、図1に示すように、下からウレタン樹脂、織物、通電性樹脂、抵抗体、ウレタン樹脂、織物であることが好ましい。
Here, the conductive resin is preferably printed on at least one surface of the fabric in a comb-like pattern as shown in FIG.
In addition, it is preferable that a urethane resin is laminated on the conductive resin and the resistor because insulation is obtained without impairing flexibility.
At that time, as shown in FIG. 1, for example, urethane resin, fabric, conductive resin, resistor, urethane resin, and fabric are preferable from the bottom as shown in FIG.

本発明の面状発熱体は、面状発熱体の基布として前記織物が含まれるので、フレキシブル性に富み、かつ低電圧でも安定した抵抗値を維持できる。   The planar heating element of the present invention includes the woven fabric as a base fabric of the planar heating element, so that the planar heating element is rich in flexibility and can maintain a stable resistance value even at a low voltage.

以下、実施例をあげて本発明を詳細に説明するが、本発明はこれらによって何ら限定されるものではない、なお、実施例中の各物性は下記の方法により測定したものである。
(1)カバーファクター(CF)
CF=(DWp/1.1)1/2×MWp+(DWf/1.1)1/2×MWf
ただし、DWpは経糸総繊度(dtex)、MWpは経糸織密度(本/2.54cm)、DWfは緯糸総繊度(dtex)、MWfは緯糸織密度(本/2.54cm)で算出する。
(2)抵抗値
デジタルテスター(FLUKE社製、型番8808A)を用いて測定した。
(3)表面温度
デジタル温度計(グラフテック社製、型番GL2200)を用いて測定した。外気温は20℃に設定し、両面を断熱材で挟んで測定した。
Hereinafter, the present invention will be described in detail with reference to examples. However, the present invention is not limited to these examples. The physical properties in the examples are measured by the following methods.
(1) Cover factor (CF)
CF = (DWp / 1.1) 1/2 × MWp + (DWf / 1.1) 1/2 × MWf
However, DWp is calculated by warp total fineness (dtex), MWp is calculated by warp weave density (main / 2.54 cm), DWf is calculated by weft total fineness (dtex), and MWf is calculated by weft weave density (main / 2.54 cm).
(2) Resistance value It measured using the digital tester (The product made by FLUKE, model number 8808A).
(3) Surface temperature It measured using the digital thermometer (Graphtec company make, model number GL2200). The outside air temperature was set to 20 ° C., and measurement was performed by sandwiching both sides with a heat insulating material.

[実施例1]
艶消し剤として二酸化チタンをポリマー重量対比0.30wt%含むポリエチレンテレフタレート糸SD280dtex/48fil(丸型断面繊維)を経糸に配し、艶消し剤として二酸化チタンをポリマー重量対比0.30wt%含むポリエチレンテレフタレート糸SD280dtex/48fil(丸型断面繊維)を緯糸に配し、常法により平織物を製織した。
次いで常法により仕上げ加工を行い、経糸密度53本/2.54cm、緯糸密度52本/2.54cmの平織物を得た。得られた平織物のカバーファクターは1,666であった。得られた平織物に常法によりウレタン樹脂をラミネート加工して基布を得た。
得られた基布の反ラミネート面に、図3に模式的に示すパターンで、抵抗値4×10−6Ω/cmの銀粒子を使用したドータイト(通電性樹脂)を100メッシュの製版を用いて櫛歯状パターン(電極間のピッチは2mmで枝の巾は1mm)に印刷し、さらにその上に抵抗値20kΩ/cmのカーボンドータイト(抵抗体)を60メッシュの製版を用いて25cmになるように印刷し、160℃7分で乾燥して布面状発熱体を得た。
得られた布面状発熱体の片面をスポンジで断熱して、20℃の雰囲気下で電源5V、電流値500mAに設定して通電すると印刷面の表面温度は50℃となった。
[Example 1]
Polyethylene terephthalate yarn SD280dtex / 48fil (round cross-section fiber) containing 0.30 wt% of titanium dioxide as a matting agent is 0.30 wt% relative to the polymer weight is arranged on the warp yarn, and polyethylene terephthalate containing 0.30 wt% of titanium dioxide as a matting agent relative to the polymer weight Yarn SD280 dtex / 48 fil (round cross-section fiber) was arranged on the weft, and a plain fabric was woven by a conventional method.
Subsequently, finishing was performed by a conventional method to obtain a plain woven fabric having a warp density of 53 / 2.54 cm and a weft density of 52 / 2.54 cm. The cover factor of the obtained plain fabric was 1,666. The obtained plain woven fabric was laminated with urethane resin by a conventional method to obtain a base fabric.
On the anti-laminate surface of the obtained base fabric, a doughite (conductive resin) using silver particles having a resistance value of 4 × 10 −6 Ω / cm 2 in a pattern schematically shown in FIG. A comb-like pattern (with a pitch between electrodes of 2 mm and a branch width of 1 mm) is used, and a carbon dotite (resistor) having a resistance value of 20 kΩ / cm 2 is further printed thereon using a 60-mesh plate. 2 and dried at 160 ° C. for 7 minutes to obtain a cloth-like heating element.
When one side of the obtained cloth-like heating element was insulated with a sponge and energized with a power supply of 5 V and a current value of 500 mA in an atmosphere of 20 ° C., the surface temperature of the printed surface became 50 ° C.

次いで、印刷面に抵抗値1×1014Ω/cmの紫外線硬化樹脂を30μmの厚さになるように全面的に印刷し、さらにその上に紫外線硬化接着剤を35μmの厚さになるように全面的に印刷して、前記と同じ平織物にウレタン樹脂をラミネート加工した基布を、ラミネート面を抵抗体側にして貼り合わせた。図1において紫外線硬化樹脂および紫外線硬化接着剤は省略して表示している。
得られた面状発熱体の絶縁、耐圧性能は、AC1500V/1分、100MΩ/500Vであった。また、フレキシブル性のある面状発熱体であった。
Next, an ultraviolet curable resin having a resistance value of 1 × 10 14 Ω / cm 2 is printed on the entire surface to a thickness of 30 μm, and an ultraviolet curable adhesive is further formed thereon to a thickness of 35 μm. A base fabric obtained by laminating urethane resin on the same plain woven fabric as described above was bonded together with the laminate surface facing the resistor. In FIG. 1, the ultraviolet curable resin and the ultraviolet curable adhesive are not shown.
The obtained sheet heating element had insulation and pressure resistance of 1500 V AC / min and 100 MΩ / 500 V. Moreover, it was a flexible planar heating element.

[実施例2]
実施例1において、電極間のピッチを7cm、枝の巾を1.5mm、カーボンドータイトの抵抗値、印刷面積をそれぞれ25kΩ/cm、100cmにする以外は実施例1と同様にして面状発熱体を得た。
得られた布面状発熱体を同様な状態で、電源100V、電流値1Aにて通電すると印刷面の表面温度は65℃となった。
得られた面状発熱体の絶縁、耐圧性能は、AC1500V/1分、100MΩ/500Vであった。また、フレキシブル性のある面状発熱体であった。
[Example 2]
In Example 1, 1.5 mm 7 cm, the width of the branches the pitch between the electrodes, the resistance value of the carbon DOTITE each print area 25k / cm 2, except that the 100 cm 2 in the same manner as in Example 1 a planar A heating element was obtained.
When the obtained cloth-like heating element was energized with a power supply of 100 V and a current value of 1 A in the same state, the surface temperature of the printed surface was 65 ° C.
The obtained sheet heating element had insulation and pressure resistance of 1500 V AC / min and 100 MΩ / 500 V. Moreover, it was a flexible planar heating element.

[比較例1]
実施例1において、使用する糸を綿糸の21番手に変更する以外は実施例1と同様に布面状発熱体を得た。得られた布面状発熱体は、硬化してフレキシブル性がないものであった。
[Comparative Example 1]
In Example 1, a cloth-like heating element was obtained in the same manner as in Example 1 except that the yarn used was changed to 21st cotton yarn. The obtained cloth-like heating element was cured and lacked flexibility.

[比較例2]
実施例1において、使用する原糸の原料をポリエチレンに変更する以外は実施例1と同様に布面状発熱体を得た。得られた布面状発熱体は、熱収縮して丸まり、評価できなかった。
[Comparative Example 2]
In Example 1, a cloth-like heating element was obtained in the same manner as in Example 1 except that the raw material of the raw yarn used was changed to polyethylene. The obtained cloth-like heating element curled due to heat shrinkage and could not be evaluated.

本発明によれば、フレキシブル性に富み、かつ低電圧でも安定した抵抗値を維持できる面状発熱体が提供され、その工業的価値は極めて大である。
ADVANTAGE OF THE INVENTION According to this invention, the planar heating element which is rich in flexibility and can maintain the stable resistance value even at a low voltage is provided, and its industrial value is extremely large.

Claims (10)

織物の少なくともどちらか一面に通電性樹脂および抵抗体が印刷されてなる面状発熱体であって、
前記織物がポリエステル繊維を含み、かつ下記式で定義するカバーファクターCFが1,000〜3,000の織物であることを特徴とする面状発熱体。
CF=(DWp/1.1)1/2×MWp+(DWf/1.1)1/2×MWf
ただし、DWpは経糸総繊度(dtex)、MWpは経糸織密度(本/2.54cm)、DWfは緯糸総繊度(dtex)、MWfは緯糸織密度(本/2.54cm)である。
A sheet heating element in which a conductive resin and a resistor are printed on at least one side of a fabric,
A planar heating element, wherein the woven fabric is a woven fabric containing polyester fibers and having a cover factor CF defined by the following formula of 1,000 to 3,000.
CF = (DWp / 1.1) 1/2 × MWp + (DWf / 1.1) 1/2 × MWf
However, DWp is the total warp fineness (dtex), MWp is the warp weave density (main / 2.54 cm), DWf is the total weft fineness (dtex), and MWf is the weft weave density (main / 2.54 cm).
前記ポリエステル繊維が長繊維である、請求項1に記載の面状発熱体。   The planar heating element according to claim 1, wherein the polyester fiber is a long fiber. 前記ポリエステル繊維において、艶消し剤がポリマー重量対比0.1重量%以上含まれる、請求項1または請求項2に記載の面状発熱体。   The planar heating element according to claim 1 or 2, wherein the polyester fiber contains a matting agent in an amount of 0.1% by weight or more relative to the polymer weight. 前記ポリエステル繊維において、単繊維繊度が10dtex以下である、請求項1〜3のいずれか一項に記載の面状発熱体。   The planar heating element according to any one of claims 1 to 3, wherein the polyester fiber has a single fiber fineness of 10 dtex or less. 前記通電性樹脂において抵抗値が10−4Ω/cm以下である、請求項1〜4のいずれか一項に記載の面状発熱体。 The planar heating element according to claim 1, wherein the conductive resin has a resistance value of 10 −4 Ω / cm 2 or less. 前記通電性樹脂が、銀または銅を含む、請求項1〜5のいずれか一項に記載の面状発熱体。   The planar heating element according to any one of claims 1 to 5, wherein the conductive resin includes silver or copper. 前記抵抗体の抵抗値が5kΩ/cm以上の固定抵抗を有する、請求項1〜6のいずれか一項に記載の面状発熱体。 The planar heating element according to any one of claims 1 to 6, wherein the resistance value of the resistor has a fixed resistance of 5 kΩ / cm 2 or more. 前記抵抗体がカーボンを含む、請求項1〜7のいずれか一項に記載の面状発熱体。   The planar heating element according to any one of claims 1 to 7, wherein the resistor includes carbon. 前記通電性樹脂が、櫛歯状パターンで織物の少なくともどちらか一面に印刷されている、請求項1〜8のいずれか一項に記載の面状発熱体。   The planar heating element according to any one of claims 1 to 8, wherein the conductive resin is printed on at least one surface of the woven fabric in a comb-like pattern. 前記通電性樹脂および抵抗体の上にウレタン樹脂が積層されている、請求項1〜9のいずれか一項に記載の面状発熱体。   The planar heating element according to any one of claims 1 to 9, wherein a urethane resin is laminated on the conductive resin and the resistor.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113122990A (en) * 2019-12-31 2021-07-16 江苏蓝丝羽家用纺织品有限公司 Antibacterial anti-mite intelligent temperature-sensing sanding fabric and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113122990A (en) * 2019-12-31 2021-07-16 江苏蓝丝羽家用纺织品有限公司 Antibacterial anti-mite intelligent temperature-sensing sanding fabric and preparation method thereof

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