JP2000338275A - Indication method for cooking time, indicator and its production method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indication method by visualizing cooking time of instant food for having after pouring hot water and leaving for a few minutes, indicator and its production method. SOLUTION: As a method for judging cooking time of instant food such as instant noodle for having after pouring hot water, color change of pigment including paper 2, which includes base ion or acid ion dissociated from alkali including paper or acid including paper 3 owing to steam, in a specific time by diffusion effect is used. The indicator is produced contacting or pressing and compressing a transparent adhesive film 1, pigment including paper 2, alkali or acid including paper 3, steam transmitting film 4, dew prevention material 5 and steam quantity controlling sheet 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method of pouring hot water,
BACKGROUND OF THE INVENTION The present invention relates to an inexpensive cooking time indicator that can be visually identified and accurately measured in an instant food that can be eaten in a few minutes.

[0002]

2. Description of the Related Art Most instant foods such as ramen, udon, buckwheat, yakisoba, ochazuke, soup, etc. are made edible by pouring boiling water when eating and leaving them to stand for a predetermined time.
This leaving time is based on human intuition or a clock such as an existing timer.

[0003]

However, the leaving time for cooking is often neglected in practice, and the eating taste is spoiled outside the predetermined time in many cases. In order to solve such a problem, it is only necessary to add a dedicated time measurement display that can visualize the arrival time starting from the time when cooking is started. However, a display having such a function has been developed. Absent. Therefore, the present invention, a predetermined time has passed, the alkali impregnated body or the acid impregnated body absorbs water vapor, a determination method that can be visually confirmed by the discoloration of the dye due to dissociated hydroxyl ions or hydrogen ions, and the It is an object to provide a display body and a method for manufacturing the display body.

[0004]

In order to achieve such an object, the present invention provides a transparent adhesive film 1, a dye-impregnated paper 2,
A method for displaying a cooking time characterized by a structure in which an alkali- or acid-impregnated paper 3, a water vapor permeable film 4, a dew condensation preventing material 5, and a water vapor amount adjusting sheet 6 are in close contact with each other, a display body thereof, and a display body integrated with them. A method of manufacturing is provided.

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of a display body showing an embodiment of the present invention, and FIG.
Is a top view. It comprises a dye-impregnated paper 2, an alkali or acid-impregnated paper 3, a water vapor permeable film 4, a dew condensation preventing material 5, and a water vapor amount adjusting sheet 6, which are compressed and fixed and integrated. As shown in FIG. 3, the display body is configured to be adhered with the transparent adhesive film 1 around a hole 9 having a diameter of several millimeters formed in the lid 8 of the target food.

As the material for the display, the dye-impregnated paper 2 and the alkali- or acid-impregnated paper 3 can be inexpensive ones using commercially available cellulose as a raw material. Further, as the water vapor permeable film 4, a hydrophobic membrane filter, an organic fluorine-based porous film, or the like that can transmit water vapor but not water droplets can be used. Dyes that change color depending on the amount of hydrogen ions, such as dyes such as phenolphthalein, thymolphthalein, bromthymol blue, methyl red, methyl orange, and congo red, and edible dyes such as red cabbage dye are used.

[0007] The dye is impregnated into an impregnated paper in a solvent, dried and then cut into a predetermined size. As the coloring agent of the pigment, use is made of sodium carbonate, sodium bicarbonate, sodium borate and the like as the alkali component or acid component as the alkali component, and sodium dihydrogen phosphate, tartaric acid, ascorbic acid, citric acid and the like as the acid. The colorant is impregnated into the impregnated paper in a solvent, dried and then cut to a predetermined size.

The dye-impregnated paper 2, the alkali- or acid-impregnated paper 3, and the water vapor permeable film 4 are pressure-fixed and integrated by a press such as a press. These display portions can be fixed to the center of the hole 8 of the lid 8 of the target food container in which a hole 9 of several millimeters has been previously formed by using the transparent film 1 having an adhesive applied to one side. When the lid 8 is opened and hot water is poured, the generated water vapor is absorbed by the alkali impregnated paper or the acid impregnated paper through the hole 9 and the water vapor permeable film 4, so that the hydroxyl ion or the hydrogen ion is dissociated, and By dissolving and diffusing into the impregnated paper 2, it spreads over the dye-impregnated paper 2 in proportion to the time,
The predetermined time can be confirmed by the discoloration of the display portion on the front side of the dye-impregnated paper 2. Also, the display body is provided with a convex portion for confirming the elapsed time as shown in FIG. 4 and FIG. 6 and a zone 7 in which the pigment is localized, and the pigment is present in that portion, and the hardening and eating time shown in FIG. 5 and FIG. By displaying the softening mark, it is possible to eat at a timing according to each taste. The stability and reproducibility of the display of the cooking time of the display body can be improved by fixing the dew condensation preventing material 5 in close contact with the lower portion of the water vapor permeable film. Further, by fixing the water vapor adjusting sheet 6 to the lower part of the water vapor permeable film 4 or to the lower part of the dew condensation preventing material 5, cooking that does not require high precision in the size of the hole 9 of the lid 8 and the mounting position of the display body is performed. Stability of display of time and reproducibility can be achieved. Next, this will be described in more detail with reference to experimental examples.

[0009]

EXAMPLES 0.1 to 2 g of phenolphthalein (Kanto Kagaku) as a raw material for a dye was 95% ethanol (Kanto Kagaku)
A solution dissolved in 90 ml is impregnated with dye-impregnated paper 2 (cellulose quantitative filter paper) and then dried, and has a diameter of 5 to 15 mm.
The resulting mixture was impregnated with alkali-impregnated paper 3 (cellulose quantitative filter paper) in a 100 ml aqueous solution in which 2 to 20 g of separately prepared sodium carbonate (Kanto Kagaku) was added to and dissolved in pure water, and then dried. Cut to the size of
The dye-impregnated paper 2, the alkali-impregnated paper 3, and the water vapor permeable film 4 (PTFE tape) are overlaid in this order, and adhered using a press.

[0010] Further, an outer diameter of 10 coated with an adhesive on one side.
An anti-condensation prevention material 5 of about mm is bonded and fixed to the back side of the water vapor permeable film 4. A transparent one-sided adhesive film 1 covering the entire display section is fixed around the hole 9 of the lid 8 of the target food container in which a hole 9 of several millimeters has been previously drilled at the position shown in FIG. FIG. 8 shows the results of a colored state confirmation test with the passage of time using the target food prepared by this method, and FIG. 9 shows the results of a colored state confirmation test with the temperature of the poured hot water. . As shown in FIG. 8, when hot water at about 70 ° C. is poured, it can be confirmed that the colored portion spreads in proportion to the passage of time. Further, as shown in FIG. 9, when the hot water is poured and left for a certain period of time (3 minutes) as shown in FIG. 9, the colored portion expands in proportion to the temperature. Takes time,
That is, since the eating time at the end of coloring is constant without being influenced by the temperature of the boiling water, the display according to the present invention serves as an index of the cooking time.

As described above, according to the present invention,
Since the cooking elapsed time of the hot water injection type instant food can be confirmed, the user can eat without losing taste or according to his / her preference.

[Brief description of the drawings]

FIG. 1 is a sectional view of a display according to the present invention.

FIG. 2 is a top view of a display according to the present invention.

FIG. 3 is a diagram in which a display body of the present invention is attached to a lid of a target food.

FIG. 4 is a cross-sectional view of a display body provided with zones where irregularities and dyes are localized for visually clearing the passage of time.

FIG. 5 is a top view of a display body provided with zones where irregularities and dyes are localized for visually clearing the passage of time.

FIG. 6 is a cross-sectional view of a display body having a rectangular shape and showing an embodiment of the present invention.

FIG. 7 is a top view of a display body showing an embodiment of the present invention having a rectangular shape.

FIG. 8 is a diagram showing the result of a colored state confirmation test performed over time.

FIG. 9 is a diagram showing a result of a test for confirming a coloring state according to the temperature of boiling water.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transparent adhesive film 2 Dye impregnated paper 3 Alkali or acid impregnated paper 4 Water vapor permeable film 5 Condensation prevention material 6 Water vapor amount adjustment sheet 7 Zone where unevenness and pigment are localized 8 Lid 9 Hole

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Naoki Mizutani 1044 Horicho, Mito-shi, Ibaraki F-term (reference) 3E062 AA10 AB14 AC01 DA02 DA06

Claims (9)

[Claims] 1. A method for judging the cooking time of an instant food, which is left for a few minutes after pouring hot water, is to determine that the coloring of the pigment is changed by the absorption of water vapor by the alkali impregnated body or the acid impregnated body. Characteristic cooking time display method for hot water injection type instant food and the like. 2. The cooking time display method according to claim 1, wherein the transparent adhesive film 1, the dye impregnated paper 2, the alkali or acid impregnated paper 3, the water vapor permeable film 4, the dew condensation preventing material 5, and the water vapor amount adjusting sheet 6. A cooking time display body characterized by a structure that adheres closely. 3. The display according to claim 2, wherein the hydroxyl ions or the hydrogen ions are dissociated from the alkali-impregnated paper 3 or the acid-impregnated paper 3 with water vapor and impregnated into the dye-impregnated paper 2.
A cooking time display element characterized in that the entirety of the dye-impregnated paper 2 is discolored by a chemical reaction in a predetermined time due to a diffusion effect, and the discoloration is visible from the surface, thereby indicating that a predetermined cooking time has been reached. 4. A cooking time indicator according to claim 1, wherein a weak alkali such as sodium carbonate, sodium hydrogen carbonate or sodium borate is used as said alkali. 5. A cooking time indicator according to claim 1, wherein said acid is a weak acid such as sodium dihydrogen phosphate, tartaric acid, ascorbic acid, citric acid or an organic acid. 6. The dye according to claim 1, wherein the dye is phenolphthalein, thymolphthalein, bromthymol blue, methyl red, methyl orange, congo red or the like, or the food dyes such as red cabbage dye. A cooking time indicator using a pigment that changes color depending on the amount of hydrogen ions. 7. A cooking time indicator according to claim 2, wherein said dew condensation preventing material 5 is porous and fibrous and has a function of absorbing dew condensation on the surface of the water vapor permeable film 4. 8. The cooking time indicator according to claim 2, wherein the indicator has a shape such as a circle, a rectangle, an ellipse, and a semicircle. 9. The display according to claim 2, wherein the dye-impregnated paper 2, the alkali or acid-impregnated paper 3, the water vapor permeable film 4, the dew condensation preventing material 5, and the water vapor amount adjusting sheet 6 are bonded or pressed. A method for producing a cooking time indicator, comprising producing by compression.