JP2780095B2 - Carbon food heating tools - Google Patents

Carbon food heating tools

Info

Publication number
JP2780095B2
JP2780095B2 JP63236279A JP23627988A JP2780095B2 JP 2780095 B2 JP2780095 B2 JP 2780095B2 JP 63236279 A JP63236279 A JP 63236279A JP 23627988 A JP23627988 A JP 23627988A JP 2780095 B2 JP2780095 B2 JP 2780095B2
Authority
JP
Japan
Prior art keywords
carbon
coating
fluororesin
food heating
substrate
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 - Lifetime
Application number
JP63236279A
Other languages
Japanese (ja)
Other versions
JPH0284910A (en
Inventor
栄一 外谷
秀逸 松尾
泰実 佐々木
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.)
Coorstek KK
Original Assignee
Toshiba Ceramics Co 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
Family has litigation
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Application filed by Toshiba Ceramics Co Ltd filed Critical Toshiba Ceramics Co Ltd
Priority to JP63236279A priority Critical patent/JP2780095B2/en
Publication of JPH0284910A publication Critical patent/JPH0284910A/en
Application granted granted Critical
Publication of JP2780095B2 publication Critical patent/JP2780095B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Cookers (AREA)

Description

【発明の詳細な説明】 産業上の利用分野 この発明は、炭素基材表面にフッ素樹脂を被覆した炭
素製品に関するものである。
Description: TECHNICAL FIELD The present invention relates to a carbon product having a carbon substrate surface coated with a fluororesin.

従来技術 炭素製品は、炭素粉体を結合材と混ぜて混練し、焼
成、黒鉛化することによって製造される。従来の炭素製
品は使用時に炭素粉体が飛散する等の問題があった。
Prior Art Carbon products are manufactured by mixing and kneading carbon powder with a binder, firing and graphitizing. Conventional carbon products have problems such as scattering of carbon powder during use.

一方、炭素材は基材の内部に多くの気孔を有し、気
体、液体を透過または浸漬させる。従って、炭素材表面
に油、薬品等が付着すると炭素材内部にこれらの液体が
流れ込む不都合が生じる。このように、従来の炭素製品
は用途が限定されていた。。
On the other hand, the carbon material has many pores inside the base material and allows gas or liquid to permeate or immerse. Therefore, when oil, chemicals, etc. adhere to the surface of the carbon material, there is a problem that these liquids flow into the carbon material. Thus, the use of the conventional carbon products has been limited. .

以上のような炭素製品の問題点を改善するために、従
来炭素基材上に熱分解炭素被膜をコーティングする方法
が知られている。
In order to improve the above-mentioned problems of carbon products, a method of coating a pyrolytic carbon film on a carbon substrate has been conventionally known.

また、炭素基材上にガラス状カーボンをコーティング
する方法も知られている。
A method of coating glassy carbon on a carbon substrate is also known.

発明が解決しようとする問題点 しかし、熱分解炭素被膜をコーティングする方法で
は、製造設備が大型となり炭素製品を安価に製造するこ
とが困難であった。
Problems to be Solved by the Invention However, in the method of coating the pyrolytic carbon film, the production equipment becomes large and it is difficult to produce carbon products at low cost.

一方、ガラス状のカーボンをコーティングする方法で
は、ガラス状カーボン膜生成の際の熱処理工程でコーテ
ィング膜にクラック等が生じてしまい、厚い膜を形成す
ること不可能であった。
On the other hand, in the method of coating glassy carbon, cracks and the like occur in the coating film in the heat treatment step at the time of forming the glassy carbon film, and it was impossible to form a thick film.

発明の目的 この発明は、前述の従来技術の問題点に鑑み、炭素製
品の強度を向上させ、炭素粉体の飛散を防止し、さら
に、気体や液体を不浸透にし、耐薬品性の向上を図るも
のである。
SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, the present invention improves the strength of carbon products, prevents the scattering of carbon powder, and further makes the gas and liquid impervious, thereby improving the chemical resistance. It is intended.

問題点を解決するための手段 本発明の炭素製品は、気孔率が15%以下である等方性
炭素基材の表面の少なくとも一部分にフッ素樹脂を5〜
5000μmの厚さで被覆したことを特徴とする。ここで等
方性炭素基材とは熱膨張係数の3軸(X,Y,Z)方向の比
が1.3以下の炭素基材を言う。被膜が5μm以下では炭
素粉体の飛散を十分に抑えることができない。また、50
00μm以上ではフッ素樹脂被膜の剥離や発泡を生じる。
Means for Solving the Problems The carbon product of the present invention is characterized in that at least a part of the surface of an isotropic carbon substrate having a porosity of 15% or less is coated with a fluororesin by 5 to 5.
It is characterized by being coated with a thickness of 5000 μm. Here, the isotropic carbon substrate refers to a carbon substrate having a thermal expansion coefficient in a triaxial (X, Y, Z) direction ratio of 1.3 or less. If the coating is 5 μm or less, scattering of the carbon powder cannot be sufficiently suppressed. Also, 50
If it is more than 00 μm, peeling or foaming of the fluororesin film occurs.

フッ素樹脂の被膜は、炭素材を意図する形状に加工し
た後に、その表面にフッ素樹脂原料を塗布し、300℃〜4
00℃で加熱することにより形成する。また、必要に応じ
てこのフッ素樹脂の膜厚を調整する。
After processing the carbon material into the intended shape, the fluororesin film is coated with a fluororesin material on the surface,
It is formed by heating at 00 ° C. The thickness of the fluororesin is adjusted as required.

被覆したフッ素樹脂を炭素基材に5μm以上の深さで
含浸してもよい。含浸することにより炭素基材とフッ素
樹脂被膜との接合強度を向上できる。
The carbon substrate may be impregnated with the coated fluororesin at a depth of 5 μm or more. By the impregnation, the bonding strength between the carbon substrate and the fluororesin coating can be improved.

等方性炭素基材はを用いることにより、局部的に加熱
された場合の熱衝撃を小さくおさえることができ、特に
その熱膨張係数の3軸方向の比較が1.3以下の場合に顕
著となる。
By using the isotropic carbon substrate, the thermal shock when locally heated can be suppressed, and it becomes particularly remarkable when the thermal expansion coefficient in the three-axis direction is 1.3 or less.

さらに、フッ素樹脂と炭素材表面との接着を強化させ
る意味で曲げ強さが25MPa以上、高密度が1.60g/cm3以上
であることが好ましい。
Further, it is preferable that the bending strength is 25 MPa or more and the high density is 1.60 g / cm 3 or more in order to strengthen the adhesion between the fluororesin and the carbon material surface.

実施例1 特殊炭素材料を300×200×10(mm)に加工し、その外
表面にポリテトラフルオロエチレン(商品名テフロン)
原料を塗布し、330℃で熱処理を行うことによって、ポ
リテトラフルオロエチレンをコーティングした炭素製品
を得た。この時、コート膜厚を変えたものを作った。
Example 1 A special carbon material was processed into 300 × 200 × 10 (mm), and polytetrafluoroethylene (trade name: Teflon) was formed on its outer surface.
A carbon product coated with polytetrafluoroethylene was obtained by applying the raw material and performing a heat treatment at 330 ° C. At this time, one having a different coating film thickness was prepared.

この結果、コート膜厚5μm未満では、炭素粉体の飛
散を十分に抑えることができなかった。また、炭素基材
内の全ての気孔をポリテトラフルオロエチレンによって
完全に覆いかぶすことができなかった。
As a result, when the coating film thickness was less than 5 μm, scattering of the carbon powder could not be sufficiently suppressed. Further, all pores in the carbon substrate could not be completely covered with polytetrafluoroethylene.

これに対し、5μm以上では、炭素粉体の飛散を押
え、しかも炭素基材の気孔を覆うことが可能である。こ
のポリテトラフルオロエチレンコートの膜厚を5000μm
より厚くすると、そのコートに際して熱処理工程の問題
から、被膜の剥離及び内部に発泡を生じた。このため、
5000μm以下が効果的であった。
On the other hand, if it is 5 μm or more, it is possible to suppress the scattering of the carbon powder and to cover the pores of the carbon base material. The thickness of this polytetrafluoroethylene coat is 5000 μm
When the thickness was increased, the coating was peeled off and foamed inside due to the problem of the heat treatment step during the coating. For this reason,
5000 μm or less was effective.

実施例2 実施例1と同様にして炭素材料にポリテトラフルオロ
エチレンをコーティングした。この時、加圧処理も行
い、ポリテトラフルオロエチレンを炭素基材に含浸し
た。膜厚が100μmであり、テフロン含浸深さは20μm
であった。
Example 2 In the same manner as in Example 1, a carbon material was coated with polytetrafluoroethylene. At this time, a pressure treatment was also performed to impregnate the carbon substrate with polytetrafluoroethylene. Thickness is 100μm, Teflon impregnation depth is 20μm
Met.

上記炭素材は、皿形をしており、この中に油を入れて
加熱したところ油が炭素基材内部に浸透することなく油
を250℃まで加熱することが可能であった。この際に、
炭素材料が熱伝導性に優れているために、油を均一に加
熱するこができるという効果がある。
The carbon material had a dish shape, and when oil was put into it and heated, it was possible to heat the oil to 250 ° C. without the oil penetrating into the carbon base material. At this time,
Since the carbon material has excellent thermal conductivity, there is an effect that the oil can be uniformly heated.

さらに、炭素基材内部に5μm以上の含浸を施すこと
によって熱伝導を向上させることが可能であり、その結
果、加熱源からの熱を有効に油に伝達できる。それゆ
え、エネルギー効率を高めることができる。
Further, heat conduction can be improved by impregnating the carbon base material with a thickness of 5 μm or more, and as a result, heat from the heating source can be effectively transmitted to the oil. Therefore, energy efficiency can be improved.

実施例3 10×10×60(mm)の炭素基材にポリテトラフルオロエ
チレンをコーティング及び含浸し、含浸の深さを3,5,10
μmとかえて、曲げ強さを測定した。結果を第1表に示
す。
Example 3 A 10 × 10 × 60 (mm) carbon substrate was coated and impregnated with polytetrafluoroethylene, and the impregnation depth was set at 3, 5, 10
The bending strength was measured instead of μm. The results are shown in Table 1.

第1表より、ポリテトラフルオロエチレンをコーティ
ングすることにより曲げ強さが向上することがわかる。
また含浸深さを3,5,10μmと深くするに従い、曲げ強さ
が大きくなることも明らかになった。
From Table 1, it can be seen that bending strength is improved by coating with polytetrafluoroethylene.
It was also found that the bending strength increased as the impregnation depth increased to 3, 5, and 10 μm.

なお、本発明は前述の実施例に限定されない。例えば
ホットプレート、天ぷらなべ等にも適用できる。
Note that the present invention is not limited to the above-described embodiment. For example, it can be applied to a hot plate, a tempura pan, and the like.

上述のように適用することにより、炭素材料が加熱時
に放出する遠赤外線を有効に利用することができる。こ
の遠赤外線は、食品を加熱する際に食品内部まで熱効率
かよく加熱することができる。このように本発明は食品
を熱処理する際に効果的であることがわかった。
By applying as described above, far-infrared rays emitted by the carbon material upon heating can be effectively used. This far-infrared ray can heat the inside of the food with good thermal efficiency when heating the food. Thus, the present invention was found to be effective in heat-treating food.

但し、炭素基材は開気孔率が15%以下のものについ
て、ポリテトラフルオロエチレンのコーティング及び含
浸の効果が特に有効であった。
However, when the carbon substrate had an open porosity of 15% or less, the effect of coating and impregnation with polytetrafluoroethylene was particularly effective.

また、開気孔率が9%以下のものでは、コーティング
及び含浸を施すことにより剥離等に有効な改善となる。
When the open porosity is 9% or less, coating and impregnation provide an effective improvement in peeling and the like.

発明の効果 本発明によれば、炭素基材の表面にフッ素樹脂を被覆
することにより、炭素基材からの炭素粉体の飛散を防止
できる。また、炭素基材表面から液体や気体が流れ込む
のを阻止することができる。さらに、炭素基材の強度を
高めることができる。
Effects of the Invention According to the present invention, scattering of carbon powder from a carbon substrate can be prevented by coating the surface of the carbon substrate with a fluororesin. Further, it is possible to prevent a liquid or gas from flowing from the surface of the carbon base material. Further, the strength of the carbon substrate can be increased.

フッ素樹脂を被覆するだけでなく、加圧処理を行い含
浸することにより、これらの効果をさらに強めることが
できる。
These effects can be further enhanced by not only coating the fluororesin but also impregnating it by applying a pressure treatment.

フロントページの続き (72)発明者 佐々木 泰実 山形県西置賜郡小国町大字小国町378番 地 東芝セラミックス株式会社小国製造 所内 (56)参考文献 特開 昭63−270015(JP,A) (58)調査した分野(Int.Cl.6,DB名) A47J 36/00 - 36/04 B32B 18/00Continuation of the front page (72) Inventor Yasumi Sasaki 378 Oguni-machi, Oguni-machi, Oguni-machi, Nishiokitama-gun, Yamagata Pref. Toshiba Ceramics Co., Ltd. Oguni Works (56) References JP-A-63-270015 (JP, A) (58) Field surveyed (Int. Cl. 6 , DB name) A47J 36/00-36/04 B32B 18/00

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】気孔率が15%以下である等方性炭素基材の
表面の少なくとも一部分にフッ素樹脂を5〜5000μmの
厚さで被覆したことを特徴とする炭素製食品加熱用具。
1. A food heating tool made of carbon, wherein at least a part of the surface of an isotropic carbon substrate having a porosity of 15% or less is coated with a fluororesin in a thickness of 5 to 5000 μm.
JP63236279A 1988-09-22 1988-09-22 Carbon food heating tools Expired - Lifetime JP2780095B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63236279A JP2780095B2 (en) 1988-09-22 1988-09-22 Carbon food heating tools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63236279A JP2780095B2 (en) 1988-09-22 1988-09-22 Carbon food heating tools

Publications (2)

Publication Number Publication Date
JPH0284910A JPH0284910A (en) 1990-03-26
JP2780095B2 true JP2780095B2 (en) 1998-07-23

Family

ID=16998433

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63236279A Expired - Lifetime JP2780095B2 (en) 1988-09-22 1988-09-22 Carbon food heating tools

Country Status (1)

Country Link
JP (1) JP2780095B2 (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0714373B2 (en) * 1987-04-28 1995-02-22 日本カーボン株式会社 Graphite heating plate for cooking

Also Published As

Publication number Publication date
JPH0284910A (en) 1990-03-26

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