JP2004293903A - Frp molding with electrothermal heater - Google Patents

Frp molding with electrothermal heater Download PDF

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Publication number
JP2004293903A
JP2004293903A JP2003086095A JP2003086095A JP2004293903A JP 2004293903 A JP2004293903 A JP 2004293903A JP 2003086095 A JP2003086095 A JP 2003086095A JP 2003086095 A JP2003086095 A JP 2003086095A JP 2004293903 A JP2004293903 A JP 2004293903A
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JP
Japan
Prior art keywords
heater
frp
sheet
frp molding
heater wire
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
Application number
JP2003086095A
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Japanese (ja)
Inventor
Takeo Shinomiya
竹男 四宮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP2003086095A priority Critical patent/JP2004293903A/en
Publication of JP2004293903A publication Critical patent/JP2004293903A/en
Pending legal-status Critical Current

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  • Central Heating Systems (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the movement and the disconnection of a heater wire and to easily form a heater sheet with a simple constitution. <P>SOLUTION: This FRP molding 2 with the electrothermal heater is provided with the buried heater wire. The FRP molding 2 with the electrothermal heater is formed by sandwiching the heater wire 1 between thermoplastic films 3, placing FRP molding materials 6 on upper and lower parts of the heater sheet 5 having a number of holes 4, and performing the press molding. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、浴室や洗面所やトイレの床パンのような内部にヒータ線を内装した電熱ヒータ付きFRP成形品に関するものである。
【0002】
【従来の技術】
従来から内部にヒータ線を内装した電熱ヒータ付きFRP成形品により浴室や洗面所やトイレの床パンのような床材を構成するものとして、例えば、目の粗い布にヒータ線を縫い付けたヒータシートをSMC等のFRP成形材料の間に入れてプレス成形して電熱ヒータ付きFRP床を形成するものが知られている。(例えば、特許文献1参照)
また、ヒータ線を樹脂を含浸したガラスクロスで挟着してプレス成形により一体に形成したヒータシートをSMC等のFRP成形材料の間に入れてプレス成形して電熱ヒータ付きFRP床を形成するものも知られている。(例えば、特許文献2参照)
ところが、上記従来例にあっては、成形時に上下のFRP成形材料が金型内を移動するが、その時の熱、圧力をヒータシートが直接受け、ヒータシートの変形やヒータ線の移動が生じてヒータ線のピッチやヒータ線の深さが変わり、場合によってはヒータ線が断線することもある。
【0003】
また、特許文献1のように目の粗い布にヒータ線を縫い付けてヒータシートを形成するものは、縫い付け工程に時間がかかり、また、特許文献2のようにヒータ線を樹脂を含浸したガラスクロスで挟着してプレス成形により一体に形成するものは、ヒータシートの形成に当たってプレス成形設備が必要となるだけでなく、ヒータシートの形成に時間がかかるという問題がある。
【0004】
【特許文献1】
特開平8−189212号公報
【特許文献2】
特開平9−222232号公報
【0005】
【発明が解決しようとする課題】
本発明は上記の従来の問題点に鑑みて発明したものであって、簡単な構成で、ヒータ線の移動や断線が発生せず、また、ヒータシートの形成も簡単に行える電熱ヒータ付きFRP成形品を提供することを課題とするものである。
【0006】
【課題を解決するための手段】
上記課題を解決するために本発明に係る電熱ヒータ付きFRP成形品は、ヒータ線1が埋設された電熱ヒータ付きFRP成形品2において、該電熱ヒータ付きFRP成形品2が、熱可塑性フィルム3にてヒータ線1をサンドイッチし且つ多数の孔4が開けられたヒータシート5の上下にFRP成形材料6を設置してプレス成形されたものであることを特徴とするものである。
【0007】
このように電熱ヒータ付きFRP成形品2が、熱可塑性フィルム3にてヒータ線1をサンドイッチし且つ多数の孔4が開けられたヒータシート5の上下にFRP成形材料6を設置してプレス成形されたものであるので、ヒータ線の移動や断線の発生が少なく、また、多数の孔4を介して上下のFRP成形材料6が一体化した電熱ヒータ付きFRP成形品2を提供でき、また、同時一体成形で得られるので成形も容易となる。
【0008】
また、熱可塑性フィルム3の表面にFRP成形材料6との密着性を上げるための処理がなされていることが好ましい。
【0009】
このような構成とすることで、ヒータシート5とFRP成形材料6とが強固に密着して層間剥離を防止できるものである。
【0010】
また、熱可塑性フィルム3のヒータ線1とほぼ対応する位置にヒータ線1よりも大径の孔4が開けられていることが好ましい。
【0011】
このような構成とすることで、孔4からFRP成形材料6が入り込んでヒータ線1の側面と上下の熱可塑性フィルム3との間にできる隙間Sを埋めてヒータ線1の移動を無くし、ヒータ線1を確実に位置決め保持できるものである。
【0012】
【発明の実施の形態】
以下、本発明を添付図面に示す実施形態に基づいて説明する。
【0013】
本発明の電熱ヒータ付きFRP成形品2は、図1に示すように上下のFRP成形材料6が硬化した上下のFRP層7間にヒータシート5が埋設一体化された層構成となっており、中間のヒータシート5は熱可塑性フィルム3にてヒータ線1をサンドイッチして構成してあり、このヒータシート5には多数の孔4が設けてあって、この孔4を介して上下のFRP成形材料6が一体に連続することで上下のFRP層7が一体化している。
【0014】
図2には本発明の電熱ヒータ付きFRP成形品2の成形を説明するための図面で、ヒータ線1を上下の熱可塑性フィルム3でサンドイッチして形成したヒータシート5の上下にSMCやBMC等のFRP成形材料6を設置して上下の金型8によりプレス成形することで本発明の電熱ヒータ付きFRP成形品2を成形するようになっている。
【0015】
ヒータシート5は多数の孔4が開けてあり、成形時に上下からのFRP成形材料6の材料流動を容易にし、FRP成形材料6の圧力を逃がし、また、上下のFRP成形材料6を一体化すると共に上下のFRP成形材料6とヒータシート5との密着性を高める効果を有している。
【0016】
ここで、ヒータシート5に孔4を開けてない場合には、成形時に上下のFRP成形材料6が金型8内を移動するが、その時の熱、圧力をヒータシート5が直接受け、ヒータシート5の変形やヒータ線1の破断がし易いので、本発明においては、上記のようにヒータシート5に多数の孔4を開けてこれを防止するようになっている。
【0017】
熱可塑性フィルム3の材料としては、PETやPBT等の材料が使用可能であるが、種々検討した結果、材料強度、硬さ、入手性等によりPETフィルムが最適である。
【0018】
使用する熱可塑性フィルム3の表面にはFRP成形材料6との密着性を上げるための表面処理がなされていることが好ましい。熱可塑性フィルム3とFRP成形材料6との密着性を上げるために熱可塑性フィルム3の表面に施す表面処理としては、例えば、熱可塑性フィルム3の表面にコロナ放電処理やサンドブラスト処理、塗膜形成処理等により行うものである。塗膜形成処理としては熱可塑性フィルム3の表面にFRP成形材料6との接着性能の良い塗膜を形成するものである。
【0019】
また、熱可塑性フィルム3の厚みとしては75〜200μ程度の厚みであれば、成形時の熱や圧力により破れや変形が無く、使用可能である。
【0020】
ヒータシート5に設ける孔4の孔径や孔4のピッチはヒータ線1のピッチやヒータシート5のサイズ、FRP成形材料6の種類等によって異なるため、成形しようとする電熱ヒータ付きFRP成形品2の種類毎に最適な条件を設定する必要がある。
【0021】
孔加工位置は、ヒータ線1間、あるいはヒータ線1にほぼ対応した位置に加工するが、孔4の孔径が小さいと成形材料が通過し難く、また、孔径が大きすぎるとヒータシート5の変形や破れが発生し易くなるので、ヒータシート5の材料やFRP成形材料6により適宜最適な条件を設定する必要がある。
【0022】
図3にはヒータ線1間に孔4を開けて、該孔4により成形時に上下からのFRP成形材料6の材料流動を容易にし、FRP成形材料6の圧力を逃がし、また、上下のFRP成形材料6を一体化すると共に上下のFRP成形材料6とヒータシート5との密着性を高めている。また、図4、図5には、ヒータ線1に対応した位置に孔4を開けた例が示してある。上下の熱可塑性フィルム3でヒータ線1をサンドイッチして上下の熱可塑性フィルム3を全面接着した場合、ヒータ線1の側方位置においては図5に示すような隙間Sが生じることがあるが、ヒータ線1に対応した位置にヒータ線1の径よりも大きい径の孔4を開けることで、孔4からFRP成形材料6が入り込んでヒータ線1の側面と上下の熱可塑性フィルム3との間にできる隙間Sを埋めてヒータ線1の移動を無くし、ヒータ線1を確実に位置決め保持できる。本例の場合も上記と同様に孔4により成形時に上下からのFRP成形材料6の材料流動を容易にし、FRP成形材料6の圧力を逃がし、また、上下のFRP成形材料6を一体化すると共に上下のFRP成形材料6とヒータシート5との密着性を高めることができる。
【0023】
次に、本発明に用いる多数の孔4を有するヒータシート5の実施例を以下に述べる。
【0024】
【実施例】
(実施例1)
熱可塑性フィルム3としてPETフィルム(東洋紡績株式会社製のE5000(厚み100μ))を用い、上下の熱可塑性フィルム3間に耐熱被覆をしたヒータ線1をヒータ線1間の間隔が30mmとなるようにして介在し、上下の熱可塑性フィルム3を超音波溶着により全面接着を行ってヒータシート5を得た。このようにして得たヒータシート5に孔径15mmの孔4を図3に示すように30×20mmのピッチでトムソン型で打ち抜いて多数の孔4を有するヒータシート5を得た。
【0025】
(実施例2)
熱可塑性フィルム3として表裏面に接着性を良くするための塗膜を形成したPETフィルム(東洋紡績株式会社製のコスモシャインA4300)を用い、上下の熱可塑性フィルム3間に耐熱被覆をしたヒータ線1をヒータ線1間の間隔が30mmとなるようにして介在し、上下の熱可塑性フィルム3を超音波溶着により全面接着を行ってヒータシート5を得た。このようにして得たヒータシート5に孔径15mmの孔4を図3に示すように30×20mmのピッチでトムソン型で打ち抜いて多数の孔4を有するヒータシート5を得た。
【0026】
(実施例3)
熱可塑性フィルム3としてPETフィルム(東洋紡績株式会社製のE5000(厚み100μ))を用い、該熱可塑性フィルムに孔径15mmの孔4を30×20mmのピッチでトムソン型で打ちぬいて形成した。この多数の孔4を有する上下の熱可塑性フィルム3間に耐熱被覆をしたヒータ線1をヒータ線1間の間隔が30mmとなるようにして介在すると共に図4に示すように孔4がヒータ線1にほぼ対応するように位置させ、上下の熱可塑性フィルム3を超音波溶着により全面接着を行って多数の孔4を有するヒータシート5を得た。
【0027】
上記実施例1、実施例2、実施例3のヒータシート5をそれぞれ図2に示すように上下の金型8間に下から順に下のSMCやBMC等のFRP成形材料6、ヒータシート5、上のSMCやBMC等のFRP成形材料6の順に設置し、上下金型8により従来と同様の方法によりプレス成形することでそれぞれ電熱ヒータ付きFRP成形品2である実サイズの浴室の洗い場用の床パンを成形した。
【0028】
このようにして成形したものは上記実施例1〜実施例3のいずれのものも良好な成形性を有していた。また、ヒータ線1の動きも少なく、温度特性も特に問題がなかった。
【0029】
【発明の効果】
上記のように本発明の請求項1記載の発明にあっては、ヒータ線が埋設された電熱ヒータ付きFRP成形品において、該電熱ヒータ付きFRP成形品が、熱可塑性フィルムにてヒータ線をサンドイッチし且つ多数の孔が開けられたヒータシートの上下にFRP成形材料を設置してプレス成形されたものであるから、ヒータ線の移動や断線の発生が少なく、また、多数の孔を介して上下のFRP成形材料が一体化し、また、同時一体成形で得られるので成形も容易となるものである。
【0030】
また、請求項2記載の発明にあっては、上記請求項1記載の発明の効果に加えて、熱可塑性フィルムの表面にFRP成形材料との密着性を上げるための処理がなされているので、ヒータシートとFRP成形材料とが強固に密着して層間剥離を防止でき、また、ヒータシートの移動も防止できて、ヒータ線の断線をより防止できるものである。
【0031】
また、請求項3記載の発明にあっては、上記請求項1又は請求項2記載の発明の効果に加えて、熱可塑性フィルムのヒータ線とほぼ対応する位置にヒータ線よりも大径の孔が開けられているので、孔からFRP成形材料が入り込んでヒータ線の側面と上下の熱可塑性フィルムとの間にできる隙間を埋めてヒータ線の移動を無くし、ヒータ線を確実に位置決め保持できるものである。
【図面の簡単な説明】
【図1】本発明の電熱ヒータ付きFRP成形品の断面図である。
【図2】同上の電熱ヒータ付きFRP成形品を金型により製造することを示す概略説明図である。
【図3】同上のヒータシートに孔を設けた一例を示す説明のための概略平面図である。
【図4】同上のヒータシートに孔を設けた他例を示す説明のための概略平面図である。
【図5】同上の断面図である。
【符号の説明】
1 ヒータ線
2 電熱ヒータ付きFRP成形品
3 熱可塑性フィルム
4 孔
5 ヒータシート
6 FRP成形材料
[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to an FRP molded product with an electric heater in which a heater wire is provided inside a bathroom, a toilet, or a floor pan of a toilet.
[0002]
[Prior art]
Conventionally, floor materials such as floor pans for bathrooms, washrooms, and toilets are constituted by FRP molded products with an electric heater in which a heater wire is internally provided. For example, a heater in which a heater wire is sewn on a coarse cloth is used. It is known that a sheet is inserted between FRP molding materials such as SMC and pressed to form an FRP floor with an electric heater. (For example, see Patent Document 1)
In addition, a heater sheet formed by pressing and forming a heater sheet integrally formed by press molding by sandwiching a heater wire with a resin impregnated glass cloth is formed by pressing between FRP molding materials such as SMC to form an FRP floor with an electric heater. Is also known. (For example, see Patent Document 2)
However, in the above conventional example, the upper and lower FRP molding materials move in the mold during molding, but the heat and pressure at that time are directly received by the heater sheet, and deformation of the heater sheet and movement of the heater wire occur. The pitch of the heater wires and the depth of the heater wires change, and in some cases, the heater wires may break.
[0003]
Further, in the case where a heater sheet is formed by sewing a heater wire to a coarse cloth as in Patent Literature 1, the sewing process takes a long time, and the heater wire is impregnated with resin as in Patent Literature 2. When the heater sheet is formed integrally by press molding by being sandwiched between glass cloths, there is a problem that not only press forming equipment is required for forming the heater sheet but also it takes time to form the heater sheet.
[0004]
[Patent Document 1]
JP-A-8-189212 [Patent Document 2]
JP-A-9-222232
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has a simple structure, in which movement and disconnection of a heater wire do not occur, and in which FRP molding with an electric heater can easily form a heater sheet. It is an object to provide products.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, an FRP molded product with an electric heater according to the present invention is a FRP molded product with an electric heater 2 in which a heater wire 1 is embedded. The FRP molding material 6 is placed above and below a heater sheet 5 in which the heater wires 1 are sandwiched and a large number of holes 4 are formed, and press-molded.
[0007]
As described above, the FRP molded product 2 with the electric heater is press-formed by sandwiching the heater wire 1 with the thermoplastic film 3 and placing the FRP molding material 6 above and below the heater sheet 5 having a large number of holes 4 formed therein. Therefore, it is possible to provide the FRP molded article 2 with the electric heater in which the movement of the heater wire and the occurrence of disconnection are small, and the upper and lower FRP molding materials 6 are integrated through the large number of holes 4. Since it is obtained by integral molding, molding becomes easy.
[0008]
Further, it is preferable that the surface of the thermoplastic film 3 has been subjected to a treatment for increasing the adhesion to the FRP molding material 6.
[0009]
With such a configuration, the heater sheet 5 and the FRP molding material 6 are firmly adhered to each other, so that delamination can be prevented.
[0010]
Further, it is preferable that a hole 4 having a diameter larger than that of the heater wire 1 is formed at a position substantially corresponding to the heater wire 1 of the thermoplastic film 3.
[0011]
With this configuration, the gap S formed between the side surface of the heater wire 1 and the upper and lower thermoplastic films 3 by the FRP molding material 6 entering through the hole 4 is eliminated, and the movement of the heater wire 1 is eliminated. The wire 1 can be reliably positioned and held.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.
[0013]
The FRP molded article 2 with an electric heater according to the present invention has a layer configuration in which the heater sheet 5 is embedded and integrated between the upper and lower FRP layers 7 in which the upper and lower FRP molding materials 6 are hardened, as shown in FIG. The intermediate heater sheet 5 is formed by sandwiching the heater wire 1 with the thermoplastic film 3, and the heater sheet 5 has a large number of holes 4, through which the upper and lower FRP moldings are formed. The upper and lower FRP layers 7 are integrated because the material 6 is integrally continuous.
[0014]
FIG. 2 is a drawing for explaining the molding of the FRP molded article 2 with an electric heater according to the present invention. The heater wire 1 is sandwiched between upper and lower thermoplastic films 3 to form an SMC, a BMC, etc. on and under a heater sheet 5. The FRP molding material 6 with an electric heater according to the present invention is formed by placing the FRP molding material 6 and press-molding the upper and lower molds 8.
[0015]
The heater sheet 5 has a large number of holes 4 to facilitate the flow of the FRP molding material 6 from above and below during molding, release the pressure of the FRP molding material 6, and integrate the upper and lower FRP molding materials 6. In addition, it has the effect of increasing the adhesion between the upper and lower FRP molding materials 6 and the heater sheet 5.
[0016]
Here, when the hole 4 is not formed in the heater sheet 5, the upper and lower FRP molding materials 6 move in the mold 8 during molding, but the heat and pressure at that time are directly received by the heater sheet 5 and the heater sheet 5 is heated. In the present invention, a large number of holes 4 are formed in the heater sheet 5 as described above to prevent the deformation and deformation of the heater wire 1.
[0017]
As a material of the thermoplastic film 3, a material such as PET or PBT can be used, but as a result of various studies, a PET film is optimal due to material strength, hardness, availability, and the like.
[0018]
It is preferable that the surface of the thermoplastic film 3 to be used has been subjected to a surface treatment for increasing the adhesion to the FRP molding material 6. Examples of the surface treatment applied to the surface of the thermoplastic film 3 in order to increase the adhesion between the thermoplastic film 3 and the FRP molding material 6 include, for example, a corona discharge treatment, a sand blast treatment, and a coating film formation treatment on the surface of the thermoplastic film 3. And so on. As the coating film forming process, a coating film having good adhesion performance with the FRP molding material 6 is formed on the surface of the thermoplastic film 3.
[0019]
If the thickness of the thermoplastic film 3 is about 75 to 200 μm, it can be used without being broken or deformed by heat or pressure during molding.
[0020]
Since the hole diameter of the holes 4 provided in the heater sheet 5 and the pitch of the holes 4 vary depending on the pitch of the heater wires 1, the size of the heater sheet 5, the type of the FRP molding material 6, etc., the FRP molded article 2 with an electric heater to be molded is formed. It is necessary to set optimal conditions for each type.
[0021]
The hole processing position is formed between the heater wires 1 or at a position substantially corresponding to the heater wire 1. If the hole diameter of the hole 4 is small, the molding material is difficult to pass. If the hole diameter is too large, the heater sheet 5 is deformed. It is necessary to set optimal conditions as appropriate according to the material of the heater sheet 5 and the FRP molding material 6 because the tearing easily occurs.
[0022]
In FIG. 3, holes 4 are formed between the heater wires 1 to facilitate the flow of the FRP molding material 6 from above and below at the time of molding, release the pressure of the FRP molding material 6, and form the upper and lower FRP during molding. The material 6 is integrated and the adhesion between the upper and lower FRP molding materials 6 and the heater sheet 5 is increased. FIGS. 4 and 5 show an example in which a hole 4 is formed at a position corresponding to the heater wire 1. When the heater wires 1 are sandwiched between the upper and lower thermoplastic films 3 and the upper and lower thermoplastic films 3 are entirely adhered, a gap S as shown in FIG. By opening a hole 4 having a diameter larger than the diameter of the heater wire 1 at a position corresponding to the heater wire 1, the FRP molding material 6 enters through the hole 4, and the space between the side surface of the heater wire 1 and the upper and lower thermoplastic films 3. The gap of the heater wire 1 is eliminated by filling the gap S that can be formed, and the heater wire 1 can be reliably positioned and held. Also in the case of this example, the material flow of the FRP molding material 6 from above and below is facilitated by the hole 4 in the same manner as described above, the pressure of the FRP molding material 6 is released, and the upper and lower FRP molding materials 6 are integrated. The adhesion between the upper and lower FRP molding materials 6 and the heater sheet 5 can be improved.
[0023]
Next, an embodiment of the heater sheet 5 having a large number of holes 4 used in the present invention will be described below.
[0024]
【Example】
(Example 1)
Using a PET film (E5000 (thickness: 100 μm, manufactured by Toyobo Co., Ltd.)) as the thermoplastic film 3, the heater wires 1 coated with heat between the upper and lower thermoplastic films 3 so that the interval between the heater wires 1 is 30 mm. Then, the upper and lower thermoplastic films 3 were entirely bonded by ultrasonic welding to obtain a heater sheet 5. Holes 4 having a hole diameter of 15 mm were punched out of the heater sheet 5 thus obtained at a pitch of 30 × 20 mm by a Thomson mold as shown in FIG. 3 to obtain a heater sheet 5 having many holes 4.
[0025]
(Example 2)
Using a PET film (Cosmo Shine A4300 manufactured by Toyobo Co., Ltd.) having a coating film on the front and back surfaces to improve the adhesiveness as the thermoplastic film 3, a heater wire having a heat-resistant coating between the upper and lower thermoplastic films 3. A heater sheet 5 was obtained by interposing the upper and lower thermoplastic films 3 by ultrasonic welding so that the distance between the heater wires 1 was 30 mm. Holes 4 having a hole diameter of 15 mm were punched out of the heater sheet 5 thus obtained at a pitch of 30 × 20 mm by a Thomson mold as shown in FIG. 3 to obtain a heater sheet 5 having many holes 4.
[0026]
(Example 3)
A PET film (E5000 (thickness: 100 μm, manufactured by Toyobo Co., Ltd.)) was used as the thermoplastic film 3, and holes 4 having a hole diameter of 15 mm were punched out of the thermoplastic film at a pitch of 30 × 20 mm using a Thomson mold. A heater wire 1 coated with heat is interposed between the upper and lower thermoplastic films 3 having a large number of holes 4 so that the distance between the heater wires 1 is 30 mm, and as shown in FIG. 1, and the upper and lower thermoplastic films 3 were entirely bonded by ultrasonic welding to obtain a heater sheet 5 having many holes 4.
[0027]
As shown in FIG. 2, the heater sheets 5 of the first, second, and third embodiments are arranged between the upper and lower dies 8 in order from the bottom in order from the bottom, such as a FRP molding material 6 such as SMC or BMC, a heater sheet 5, The FRP molding materials 6 such as SMC and BMC are placed in this order, and press-molded by the upper and lower dies 8 in the same manner as in the past to form FRP molded products 2 with an electric heater, respectively. A floor pan was formed.
[0028]
Any of the above-described examples 1 to 3 had good moldability. Further, the movement of the heater wire 1 was small, and there was no particular problem in the temperature characteristics.
[0029]
【The invention's effect】
As described above, in the invention according to claim 1 of the present invention, in an FRP molded article with an electric heater in which a heater wire is embedded, the FRP molded article with an electric heater has a heater wire sandwiched by a thermoplastic film. Since the FRP molding material is placed above and below the heater sheet with a large number of holes formed and press-molded, the occurrence of heater wire movement and disconnection is small, and the vertical Since the FRP molding materials described above are integrated and can be obtained by simultaneous integral molding, molding is also facilitated.
[0030]
Further, in the invention according to claim 2, in addition to the effect of the invention described in claim 1, a treatment is performed on the surface of the thermoplastic film to increase the adhesion with the FRP molding material. The heater sheet and the FRP molding material are firmly adhered to each other, whereby delamination can be prevented, and movement of the heater sheet can be prevented, so that breakage of the heater wire can be further prevented.
[0031]
According to the third aspect of the present invention, in addition to the effects of the first or second aspect, a hole having a larger diameter than the heater wire is provided at a position substantially corresponding to the heater wire of the thermoplastic film. The FRP molding material enters through the hole and fills the gap between the side of the heater wire and the upper and lower thermoplastic films, eliminating the movement of the heater wire and ensuring the positioning and holding of the heater wire. It is.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an FRP molded product with an electric heater according to the present invention.
FIG. 2 is a schematic explanatory view showing that an FRP molded product with an electric heater is manufactured using a mold.
FIG. 3 is a schematic plan view for explaining an example in which holes are provided in the heater sheet according to the first embodiment.
FIG. 4 is a schematic plan view for illustrating another example in which holes are provided in the heater sheet of the above.
FIG. 5 is a sectional view of the same.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Heater wire 2 FRP molded product with electric heater 3 Thermoplastic film 4 Hole 5 Heater sheet 6 FRP molding material

Claims (3)

ヒータ線が埋設された電熱ヒータ付きFRP成形品において、該電熱ヒータ付きFRP成形品が、熱可塑性フィルムにてヒータ線をサンドイッチし且つ多数の孔が開けられたヒータシートの上下にFRP成形材料を設置してプレス成形されたものであることを特徴とする電熱ヒータ付きFRP成形品。In an FRP molded product with an electric heater in which a heater wire is embedded, the FRP molded product with an electric heater sandwiches the heater wire with a thermoplastic film and applies FRP molding material to the top and bottom of a heater sheet having a large number of holes. An FRP molded product with an electric heater, which is mounted and press-molded. 熱可塑性フィルムの表面にFRP成形材料との密着性を上げるための処理がなされていることを特徴とする請求項1記載の電熱ヒータ付きFRP成形品。The FRP molded article with an electric heater according to claim 1, wherein a treatment for increasing the adhesion to the FRP molding material is performed on the surface of the thermoplastic film. 熱可塑性フィルムのヒータ線とほぼ対応する位置にヒータ線よりも大径の孔が開けられていることを特徴とする請求項1又は請求項2記載の電熱ヒータ付きFRP成形品。3. The FRP molded article with an electric heater according to claim 1, wherein a hole having a diameter larger than that of the heater wire is formed at a position substantially corresponding to the heater wire of the thermoplastic film.
JP2003086095A 2003-03-26 2003-03-26 Frp molding with electrothermal heater Pending JP2004293903A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003086095A JP2004293903A (en) 2003-03-26 2003-03-26 Frp molding with electrothermal heater

Publications (1)

Publication Number Publication Date
JP2004293903A true JP2004293903A (en) 2004-10-21

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Family Applications (1)

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JP2003086095A Pending JP2004293903A (en) 2003-03-26 2003-03-26 Frp molding with electrothermal heater

Country Status (1)

Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105928039A (en) * 2016-06-15 2016-09-07 朱森 Fiber reinforced plastic (FRP) heater for bathroom
CN110230838A (en) * 2019-06-11 2019-09-13 浙江米科光电科技股份有限公司 A kind of PTC heated type heater

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105928039A (en) * 2016-06-15 2016-09-07 朱森 Fiber reinforced plastic (FRP) heater for bathroom
CN110230838A (en) * 2019-06-11 2019-09-13 浙江米科光电科技股份有限公司 A kind of PTC heated type heater

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