JPH061814Y2 - Heat manifest material - Google Patents
Heat manifest materialInfo
- Publication number
- JPH061814Y2 JPH061814Y2 JP6841888U JP6841888U JPH061814Y2 JP H061814 Y2 JPH061814 Y2 JP H061814Y2 JP 6841888 U JP6841888 U JP 6841888U JP 6841888 U JP6841888 U JP 6841888U JP H061814 Y2 JPH061814 Y2 JP H061814Y2
- Authority
- JP
- Japan
- Prior art keywords
- polymer resin
- heat
- corrosive
- metal
- substance
- 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
Links
Landscapes
- Laminated Bodies (AREA)
Description
本考案は熱顕在性材料に関するものであり、例えばレト
ルト食品等の加熱時間を計時することのできるインジケ
ータ等の熱顕在性材料に関するものである。The present invention relates to a heat-tangible material such as an indicator that can measure the heating time of a retort food or the like, for example.
カレー等のレトルト食品の多くは高分子樹脂製の袋に収
納して供給されており、調理の段階で袋から取り出し鍋
等で加熱したり、或は袋のまま加熱されて消費されてい
る。 しかし、従来のレトルト食品においては加熱時間を計時
する適当な手段をもっていないために、勘で適当に加熱
しているのが現状である。加熱時間が短いと十分温度が
上がらず、おいしく食べることができないために、勘に
頼る方法では一般に長めの加熱をする傾向があり、エネ
ルギーと時間が無駄に消費されると云う問題点があっ
た。 なお、物質の性状変化を捕らえて計時する方法として
は、特開昭６１−１７６８７９号公報が提案されている
が、この技術は計時の開始時に腐蝕性溶液を滴下しなけ
ればならないと云う不便があり、また常温で保管中も腐
蝕性物質が滴下されると計時を開始するので、ある一定
温度以上に加熱されたときの時間を計時すると云うこと
は出来ない。Most of retort foods such as curry are stored in a bag made of a polymer resin and supplied, and are taken out of the bag at the stage of cooking and heated in a pan or the like, or are heated in the bag and consumed. However, in the conventional retort pouch food, since there is no suitable means for measuring the heating time, it is the current situation that the food is properly cooked. If the heating time is short, the temperature will not rise sufficiently and you will not be able to eat deliciously.Therefore, the method that relies on intuition tends to cause longer heating, and there is a problem that energy and time are wasted. . Incidentally, as a method for measuring the time by capturing the change in the property of the substance, Japanese Patent Application Laid-Open No. 61-176879 has been proposed, but this technique has an inconvenience that the corrosive solution must be dropped at the start of the time measurement. In addition, since the time measurement starts when the corrosive substance is dropped even during storage at room temperature, it cannot be said that the time when the material is heated to a certain temperature or higher is measured.
上記したように、従来のレトルト食品では加熱時間を直
接計時する適当な方法が無かったため、レトルト食品等
の包装袋に貼着することのできる、手軽な熱顕在性材料
の考案が望まれていた。As described above, in the conventional retort food, since there was no suitable method for directly measuring the heating time, it was desired to devise a simple heat-tangible material that can be attached to a packaging bag such as a retort food. .
本考案は上記した従来技術の課題を解決するためになさ
れたもので、耐熱耐蝕性透明高分子樹脂、易腐蝕性金
属、部分形成された防蝕塗膜層および昇温時透過性が増
大する高分子樹脂が順次積層された、多層構成シートの
透過性高分子樹脂に腐蝕性物質が接触して設けられてい
ることを特徴とする熱顕在性材料を提供するものであ
る。The present invention has been made to solve the above-mentioned problems of the prior art. It is made of a heat-resistant and corrosion-resistant transparent polymer resin, an easily corrosive metal, a partially formed anticorrosion coating layer and a high-temperature-increased permeability. The present invention provides a heat manifesting material characterized in that a corrosive substance is provided in contact with a permeable polymer resin of a multilayer constitution sheet in which molecular resins are sequentially laminated.
本考案になる熱顕在性材料は通常レトルト食品等の包装
袋の外側に貼着して用いられる。常温においては熱顕在
性材料の腐蝕性物質は透過性高分子樹脂によって易腐蝕
性金属と離間されているが、レトルト食品等と共に加熱
されると透過性高分子樹脂は腐蝕性物質を透過させ易く
なるので、該高分子樹脂を腐蝕性物質は透過して易腐蝕
性金属面まで達しこれを腐蝕する。このとき易腐蝕性金
属の表面には防蝕塗膜層が設けられているので防蝕塗膜
層の無いところだけが選択的に腐蝕される。したがっ
て、防蝕塗膜層を『加熱できました』と云うような文字
が残るように設けておけば、文字部のみが選択的に腐蝕
され、非腐蝕部とは違う色に変るので、一目見て所定の
温度に所定時間加熱されたことが分かる。The heat manifest material according to the present invention is usually used by being attached to the outside of a packaging bag for retort foods or the like. At room temperature, the corrosive substance of the heat manifest material is separated from the easily corrosive metal by the permeable polymer resin, but the permeable polymer resin easily permeates the corrosive substance when heated with the retort food etc. Therefore, the corrosive substance permeates the polymer resin and reaches the easily corroded metal surface to corrode it. At this time, since the anticorrosion coating layer is provided on the surface of the easily corrosive metal, only the portion without the anticorrosion coating layer is selectively corroded. Therefore, if the anticorrosion coating layer is provided so that the characters such as "I was able to heat it" remain, only the character part will be selectively corroded, and the color will change to a color different from the non-corroded part. It can be seen that it was heated to a predetermined temperature for a predetermined time.
つぎに本考案を図示の実施例に基づいて詳細に説明す
る。 本考案になる熱顕在性材料は、常温においては腐蝕性物
質（例えば弱酸性水溶液である食酢）１を透過せず、あ
る一定温度（例えば８０℃）以上に昇温したとき腐蝕性
物質１が透過可能となる高分子樹脂（例えばポリエチレ
ンフィルム／ポリ塩化ビニリデン／ポリエチレン）２ａ
を内面に配した多層構成シート２と耐熱性と耐薬品性に
優れた高分子樹脂（例えばポリエステル）３とによって
囲われた空隙に前記腐蝕性物質１が充填された構成とな
っている。多層構成シート２は高分子樹脂２ａと高分子
樹脂３の端部がヒートシールされて袋状に形成されてい
る。 多層構成シート２はある一定温度（この場合８０℃）以
上で腐蝕性物質１の透過性が発現する高分子樹脂２ａの
上に、片面が容易に腐蝕される易腐蝕性金属（例えばア
ルミニウム）２ｂが蒸着被覆された耐熱性と耐蝕性に優
れた透明な高分子樹脂（例えばポリエステルフィルム）
２ｃが、易腐蝕性金属２ｂを下にして貼り合わされてい
る。そして、易腐蝕性金属２ｂの表面には腐蝕性物質１
から易腐蝕性金属２ｂを隔離して保護する防蝕塗膜層
（例えばアクリル樹脂系インキ）２ｄが『加熱できまし
たおたべください』と云う文字（図示せず）の部分を残
して全面的に塗膜されている。 上記構成の熱顕在性材料は高分子樹脂３の側をレトルト
食品の包装袋（図示せず）に貼着（ヒートシール、接着
等）して加熱時間インジケータとして用いられる。そし
て常温にレトルト食品が保管されている限り、腐蝕性物
質１と易腐蝕性金属２ｂは高分子樹脂２ａによって隔離
されているので、易腐蝕性金属２ｂが腐蝕することはな
い。 レトルト食品を加熱するため、鍋等に入れて加熱を始め
ると、レトルト食品の包装袋に貼着されている加熱時間
インジケータもレトルト食品と共に次第に加熱され、高
分子樹脂２ａが所定温度以上に昇温したとき腐蝕性物質
１を透過させ始める。したがって、所定温度以上に加熱
されると腐蝕性物質１が高分子樹脂２ａを透過して易腐
蝕性金属２ｂに達しこれを腐蝕する。易腐蝕性金属２ｂ
の高分子樹脂２ａ側には『加熱できましたおたべくださ
い』と云う文字の部分を除いて防蝕塗膜層２ｄが全面的
に設けられているので、文字の部分だけが選択的に腐蝕
される。そして、選択的に腐蝕された易腐蝕性金属２ｂ
の表面はこの場合酸化されて溶解するか、又はアルミナ
に変化するので、金属光沢の中に『加熱できましたおた
べください』と云う白い文字が浮き出る。易腐蝕性金属
２ｂの上を被覆している高分子樹脂２ｃが透明な樹脂で
あるので、前記文字を容易に読み取ることができる。 本考案に用いる高温時に透過性を発現する高分子樹脂２
ａとしては実施例に示した樹脂の他にもポリプロピレン
／エチレンビニルアルコール・コポリマ／ポリプロピレ
ンのような共押出フィルム等を用いることができる。こ
のような特性を有する高分子樹脂２ａは１０〜１００μ
mの範囲で自由に変えて計時時間を調整することができ
る。 腐蝕性物質１は被包している多層構成シート２または高
分子樹脂３が破れたときにも危険がないように実施例で
は液体の食酢を使用したが、危険の無いものであれば液
体に限らず固形物、ガス状の他の腐蝕性物質てあっても
よい。 易腐蝕性金属２ｂは前記腐蝕性物質１によって腐蝕さ
れ、表面の色が変化するものであればアルミニウムに限
らず鉄のような他の金属であってもよいが、アルミニウ
ムが高分子樹脂２ｃの上に蒸着し易いので使い易い。そ
して、易腐蝕性金属２ｂの厚さは１００〜１０００Åと
云う薄く設けても十分文字、図柄が識別できる。易腐蝕
性金属２ｂは蒸着して設ける他、箔、粉末等で接着して
設けてもよい。易腐蝕性金属２ｂは高分子樹脂２ｃの全
面に設けても、『加熱できましたおたべください』のよ
うなメッセッージが表せるだけの最小限の面積で設ける
こともできる。 防蝕塗膜層２ｄは腐蝕性物質１から易腐蝕性金属２を保
護することのできる物質であればよいので、腐蝕性物質
１との関係で自由に選択可能であり、エポキシ−リン酸
樹脂系インキ等であってもよい。 なお、本考案に用いられる高分子樹脂等の素材は何れも
熱湯の中に少なくとも２〜３分間は浸漬されるので耐水
性と１００℃程度以上の耐熱性を有するものでなければ
ならない。 以上、レトルト食品の加熱時間インジケータとして用い
る例を説明したが、本考案はこれに限らず、くじ等に用
いることもできる。Next, the present invention will be described in detail based on the illustrated embodiment. The heat manifest material according to the present invention does not permeate a corrosive substance (for example, vinegar, which is a weakly acidic aqueous solution) 1 at room temperature, and the corrosive substance 1 is not generated when the temperature is raised above a certain temperature (for example, 80 ° C.). Permeable polymer resin (eg polyethylene film / polyvinylidene chloride / polyethylene) 2a
The corrosive substance 1 is filled in a space surrounded by a multi-layered sheet 2 having an inner surface and a polymer resin (for example, polyester) 3 having excellent heat resistance and chemical resistance. The multilayer component sheet 2 is formed in a bag shape by heat-sealing the ends of the polymer resin 2a and the polymer resin 3. The multi-layered structure sheet 2 has a polymer resin 2a which exhibits permeability of the corrosive substance 1 at a certain temperature (80 ° C. in this case) or more, and an easily corrosive metal (for example, aluminum) 2b which is easily corroded on one side. Transparent polymer resin with excellent heat resistance and corrosion resistance (eg polyester film)
2c are pasted together with the easily corrosive metal 2b facing down. The corrosive substance 1 is formed on the surface of the easily corroding metal 2b.
The anticorrosion coating layer (for example, acrylic resin ink) 2d that isolates and protects the easily corroding metal 2b from the entire surface is applied except for the portion of the character (not shown) saying "I was able to heat up." It is a film. The heat manifesting material having the above-mentioned configuration is used as a heating time indicator by sticking (heat sealing, adhering or the like) the polymer resin 3 side to a packaging bag (not shown) for retort food. As long as the retort food is stored at room temperature, the corrosive substance 1 and the easily corrosive metal 2b are separated by the polymer resin 2a, so that the easily corrosive metal 2b is not corroded. In order to heat the retort food, when it is put in a pan or the like to start heating, the heating time indicator attached to the packaging bag for the retort food is also gradually heated together with the retort food, and the polymer resin 2a is heated to a temperature higher than a predetermined temperature. Then, the corrosive substance 1 starts to permeate. Therefore, when the corrosive substance 1 is heated to a predetermined temperature or higher, the corrosive substance 1 permeates the polymer resin 2a and reaches the easily corrosive metal 2b to corrode it. Easily corrosive metal 2b
Since the polymer resin 2a side is provided with the anticorrosion coating layer 2d on the entire surface except for the part of the character saying "I was able to heat up", only the part of the character is selectively corroded. . Then, the easily corroding metal 2b selectively corroded
In this case, the surface of is oxidized and dissolved, or it changes to alumina, so white letters "I was able to heat up" appear in the metallic luster. Since the polymer resin 2c covering the easily corrosive metal 2b is a transparent resin, the characters can be easily read. Polymer resin 2 used in the present invention that exhibits permeability at high temperatures 2
As a, a coextruded film such as polypropylene / ethylene vinyl alcohol / copolymer / polypropylene may be used in addition to the resins shown in the examples. The polymer resin 2a having such characteristics is 10 to 100 μm.
The time can be adjusted by freely changing it within the range of m. The corrosive substance 1 used liquid vinegar in the examples so that there is no danger even when the encapsulating multi-layered sheet 2 or the polymer resin 3 is broken. However, it is not limited to solid substances and other corrosive substances in gaseous form. The easily corrosive metal 2b is not limited to aluminum as long as it is corroded by the corrosive substance 1 and the color of the surface changes, but other metal such as iron may be used. Easy to use as it is easy to deposit on top. Further, even if the easily corroding metal 2b is provided with a thin thickness of 100 to 1000Å, characters and patterns can be sufficiently identified. The easily corrosive metal 2b may be provided by vapor deposition, or may be provided by adhesion with foil, powder or the like. The easily corrosive metal 2b can be provided on the entire surface of the polymer resin 2c, or can be provided with a minimum area for displaying a message such as "I was able to heat up". The anticorrosion coating layer 2d may be any substance as long as it can protect the easily corrosive metal 2 from the corrosive substance 1, so that it can be freely selected in relation to the corrosive substance 1, and the epoxy-phosphoric resin type It may be ink or the like. It should be noted that any material such as a polymer resin used in the present invention must have water resistance and heat resistance of about 100 ° C. or higher because it is immersed in boiling water for at least 2 to 3 minutes. The example of use as a heating time indicator of retort food has been described above, but the present invention is not limited to this, and can be used for lottery and the like.
以上説明したように、本考案になる熱顕在性材料は耐熱
耐蝕性透明高分子樹脂、易腐蝕性金属、部分形成された
防蝕塗膜層および昇温時透過性が増大する高分子樹脂が
順次積層された、多層構成シートの透過性高分子樹脂に
腐蝕性物質が接触して設けられているので、加熱時間に
より文字等を顕在化させることができ、レトルト食品等
の包装袋に貼着して置けばレトルト食品ごと加熱すれ
ば、所定温度以上に昇温した時から腐蝕性物質が透過性
の高分子樹脂を透過し始めて、易腐蝕性金属を腐蝕する
ので、レトルト食品等が昇温しているときの時間が正確
に計時できる。 なお、本考案になる熱顕在性材料は腐蝕性物質、易腐蝕
性金属および透過性高分子樹脂の種類、濃度、膜厚等を
適宜組み合わせることにより数分〜数十分と云う長い時
間までが計時可能であるので、レトルト食品の種類と内
容量に応じて幾通りものインジケータを作ることができ
る。 また、防蝕塗膜層に工夫を加えることによって種々のメ
ッセージを伝えることができる。As described above, the heat-visible material according to the present invention comprises a heat-resistant and corrosion-resistant transparent polymer resin, an easily corrosive metal, a partially formed anticorrosion coating layer, and a polymer resin whose permeability increases at elevated temperature. Since the corrosive substance is provided in contact with the permeable polymer resin of the laminated, multi-layered structure sheet, the characters etc. can be revealed by the heating time, and it can be attached to the packaging bag of retort food etc. If the retort food is heated together, the corrosive substance will start to permeate the permeable polymer resin when the temperature rises above the predetermined temperature and corrode easily corrosive metals. The time when you are standing can be accurately measured. The heat manifest material according to the present invention can be used for a long time of several minutes to several tens of minutes by appropriately combining the types, concentrations, film thicknesses, etc. of corrosive substances, easily corrosive metals and permeable polymer resins. Since it can be timed, various kinds of indicators can be made according to the type and content of the retort food. Also, various messages can be transmitted by devising the anticorrosion coating layer.
第１図は本考案になる熱顕在性材料の断面を例示的に示
す説明図である。 １…腐蝕性物質、 ２…多層構成シート、 ２ａ…透過性高分子樹脂、 ２ｂ…易腐蝕性金属、 ２ｃ…高分子樹脂、 ２ｄ…防蝕塗膜層、 ３…高分子樹脂。FIG. 1 is an explanatory view exemplarily showing a cross section of a heat manifesting material according to the present invention. DESCRIPTION OF SYMBOLS 1 ... Corrosive substance, 2 ... Multilayer composition sheet, 2a ... Permeable polymer resin, 2b ... Easy corrosive metal, 2c ... Polymer resin, 2d ... Corrosion-resistant coating layer, 3 ... Polymer resin.
Claims (1)
属、部分形成された防蝕塗膜層および昇温時透過性が増
大する高分子樹脂が順次積層された、多層構成シートの
透過性高分子樹脂に腐蝕性物質が接触して設けられてい
ることを特徴とする熱顕在性材料。1. Permeability of a multi-layered sheet in which a heat-resistant and corrosion-resistant transparent polymer resin, an easily corrosive metal, a partially formed anticorrosion coating film layer, and a polymer resin whose permeability increases at elevated temperature are sequentially laminated. A heat manifest material characterized in that a corrosive substance is provided in contact with a polymer resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6841888U JPH061814Y2 (en) | 1988-05-24 | 1988-05-24 | Heat manifest material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6841888U JPH061814Y2 (en) | 1988-05-24 | 1988-05-24 | Heat manifest material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01171638U JPH01171638U (en) | 1989-12-05 |
| JPH061814Y2 true JPH061814Y2 (en) | 1994-01-19 |
Family
ID=31293739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6841888U Expired - Lifetime JPH061814Y2 (en) | 1988-05-24 | 1988-05-24 | Heat manifest material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH061814Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102077060B (en) * | 2008-06-04 | 2014-10-29 | G·帕特尔 | A monitoring system based on corroded metal |
| EP2475612A4 (en) * | 2009-09-11 | 2017-09-13 | Jp Laboratories, Inc. | Monitoring devices and processes based on transformation, destruction and conversion of nanostructures |
-
1988
- 1988-05-24 JP JP6841888U patent/JPH061814Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01171638U (en) | 1989-12-05 |
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