JP2016082885A - Edible metal foil, food and cosmetics - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an edible metallic foil easy to handle, and suppressed in a production cost, and a food and a cosmetic using the edible metallic foil.SOLUTION: An edible metallic foil includes an edible film, adhesion layers provided on both surfaces of the edible film, and a metallic foil stuck to the one adhesion layer in the adhesion layers on both surfaces. The edible film is supported from both surfaces by the adhesion layers by providing the adhesion layers on both surfaces of the edible film, and therefore, the edible layer is hardly deformed in the case of absorbing water, and consequently, deformation of the whole edible metallic foil is suppressed. A degree of deformation of the edible film can be adjusted by changing a thickness or a quality of material of the adhesion layer on each of the surfaces.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an edible metal foil that is easy to handle and has a reduced manufacturing cost, and a food and a cosmetic using the edible metal foil.

Conventionally, an edible metal foil in which a metal foil such as a gold foil or a silver foil is laminated on an edible film via an adhesive layer is known.
Edible metal foil is molded into powder or chips, cut out as letters or patterns, and placed on food, floated on beverages, spherical or cubic sugar or chocolate surfaces It is widely used for decoration, such as coating (see Patent Document 1).
In addition, the applicants of the present application have shown that the gold foil improves skin moisture retention (skin moisture content) and elasticity (skin elasticity (return rate)), and the relaxation effect and film-like effect that the gold foil gives to people. It has been clarified that it has the possibility of improving skin symptoms (see Non-Patent Document 1), and foods and cosmetics using edible metal foil are being developed to utilize these effects of gold foil.

Here, pullulan, oblate, gelatin, agar, alginic acid, etc., which are common edible film materials, are superior in hydrophilicity and water-solubility, so they are warped by absorbing moisture from food and steam generated from beverages. There is a problem that deformation such as wrinkles and lumps occurs, and a problem that the appearance of the edible metal foil deteriorates.
In addition, the edible film has a sticky surface when it absorbs moisture, and once it comes into contact with food, it exerts an adhesive effect and its position cannot be changed. there were.
In addition, when the edible metal foils are laminated, they are brought into close contact with each other by so-called blocking, so that there is a problem that it is impossible to cut and cut them together in a laminated state.
Therefore, an edible metal foil is known in which one surface (front surface) of an edible film is smoothed and the other surface (back surface) is roughened, and metal foil is pasted on both front and back surfaces (Patent Document 2). reference).
In this edible metal foil, since the metal foil comes into contact with food, it is difficult for the edible film to absorb moisture and the like of the food, and it is difficult to deform, and air is retained in the unevenness on the back side, so that blocking is unlikely to occur. There are advantages.

Japanese Patent No. 2860631 Japanese Patent No.2992741

Takashi Koikeda, Kenji Nakayama, etc., "Medical Care and New Drugs" (Vol. 51, No. 7) Reprint July 28, 2014 (July issue)

However, the technique disclosed in Patent Document 2 has the following problems.
That is, since metal foil is affixed on both sides of the edible film, there is a problem that the manufacturing cost increases.
In addition, the surface side of the edible metal foil shines without losing its luster, and the uneven back surface side has lost its luster, so it is preferable to expose the surface side during use, but the surface is exposed by distinguishing the front and back sides. There is also a problem that it takes time and troublesome work.

  In view of such problems, an object of the present invention is to provide an edible metal foil that is easy to handle and has a low manufacturing cost, and a food and a cosmetic using the edible metal foil.

The edible metal foil of the present invention comprises an edible film, an edible adhesive layer provided on both surfaces of the edible film, and a metal foil that is attached only to one of the adhesive layers on both surfaces. Features.
The degree of deformation of the edible film may be adjusted by changing the thickness or material of each of the adhesive layers on both sides.
Further, the surface of the edible film on which the metal foil is not attached is formed to be rougher than the surface on which the metal foil is attached.
Further, the edible film has a large number of bubbles therein.
The metal foil may include at least one of gold, silver, copper, and platinum.
In addition, the metal foil has an edible property manufactured by any one of a traditional foil casting process, a sputtering method, a vacuum deposition method, and an ion plating method.
Moreover, the foodstuff of this invention uses the said edible metal foil, It is characterized by the above-mentioned.
The cosmetic of the present invention is characterized by using the edible metal foil.

In this invention, by providing an adhesive layer on both surfaces of the edible film, both surfaces of the edible film are supported by the adhesive layer. Therefore, even when the edible film absorbs moisture, it becomes difficult to deform, and as a result, deformation of the entire edible metal foil can be suppressed.
In addition, the adhesive layer on the side where the metal foil is not affixed (the adhesive layer on the back side) exerts an adhesive effect and adheres to foods, etc., so that the position of the edible metal foil placed on the food may shift or peel off. Can be prevented.
In addition, the degree of deformation of the edible film can be adjusted by changing the thickness or material of the adhesive layers on both the front and back surfaces. For example, if the material of each adhesive layer is the same and the adhesive layer on the side to which the metal foil is not attached (adhesive layer on the back side) is made thinner than the other adhesive layer (adhesive layer on the front side), the thinner one The adhesive layer (the adhesive layer on the back side) is relatively flexible. Therefore, the edible film that has absorbed moisture is likely to warp in the direction of the thinner adhesive layer (the adhesive layer on the back side), and can be naturally deformed so that the metal foil is exposed.
The same effect can be obtained by changing the material of each adhesive layer so that the adhesive layer on the side to which the metal foil is not attached (adhesive layer on the back side) is softer than the other adhesive layer (adhesive layer on the front surface side). It can also be obtained in the case of high). Thus, by changing the thickness or material of each adhesive layer to adjust the degree of deformation of the edible film, it becomes possible not only to make it difficult to deform when absorbing moisture, but also to positively deform it. Therefore, there is a possibility that an edible metal foil that is three-dimensionally deformed from a planar shape by absorbing moisture can be produced.
Further, the thickness and material of each adhesive layer may be changed in consideration of the fact that the adhesive layer on the back surface side relatively easily absorbs water as compared with the adhesive layer on the front surface side.

In addition, if the surface (back surface) of the edible film on which the metal foil is not affixed is made rougher than the other surface (surface), the back surface side adhesive layer will also be uneven, so that When the metal foils are superposed, air stays between the irregularities of the adhesive layer, and blocking can be suppressed. Moreover, you may decide to suppress blocking by weakening the adhesive force of the back surface side adhesive layer, without forming a rough surface.
Further, by forming a large number of bubbles in the edible film, the flexibility is increased and the stickiness at the time of moisture absorption can be suppressed, so that the food texture can be kept good. In addition, since the buoyancy is increased, it becomes fragile, so that it is possible to obtain a visual effect of breaking after being floated in the beverage for a while and then being dispersed in the beverage. In addition, the amount of material used can be reduced while securing the volume of the edible film.
In addition, if a metal foil containing at least one of gold, silver, copper, and platinum or using a traditional foil punching process is used, the metal foil consisting of a traditional foil punching process is sputtered. It is known that the amount of chemical substances used is small compared to industrially manufactured metal foils such as the law, so it is known that there is no adverse effect on the human body if it is an appropriate amount. Safety when used can be increased.
In addition, due to recent technological innovations, it has become possible to produce edible metal foils by industrial methods such as sputtering, vacuum deposition, or ion plating, so they were manufactured by industrial methods. If edible metal foil is used, the manufacturing cost of edible metal foil can be suppressed.
In particular, when the metal foil contains gold, the gold foil has improved the skin's moisture retention (skin moisture content) and elasticity (skin elasticity (return rate)), and the gold foil has a relaxing effect and a film-like appearance. Since it has been proven to have an effect, it can effectively improve skin symptoms when used in cosmetics.

Side view showing the structure of edible metal foil Side view showing the structure of edible metal foil Side view showing the structure of edible metal foil

Embodiments of the edible metal foil of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the edible metal foil 10 includes an edible film 20, an adhesive layer 30, and a metal foil 40. Note that the structures and dimensions of the edible film 20, the adhesive layer 30, and the metal foil 40 in the figure are merely schematically shown.
The edible film 20 is used to support the metal foil 40 from the back side thereof, and is made of an edible material.
As the edible film 20, it is possible to use a well-known film body having hydrophilicity and water-solubility such as starch, carbohydrate, and protein such as pullulan, wafer, yuba, gelatin, agar, and alginic acid.
In the present embodiment, the surface (back surface) 21 on the side where the metal foil 40 is not affixed is formed rougher than the surface (surface) 22 on the side where the metal foil 40 is affixed. doing.
As a method of forming a rough surface on the edible film 20, for example, by applying a liquid edible film 20 material on a base having fine irregularities, the fine irregularities can be formed by applying the material to the edible film 20. A method of transferring to one of the surfaces, a method of once forming a smooth surface on the edible film 20, and then sanding the smooth surface, are not limited thereto.
In the present embodiment, the edible film 20 has a large number of bubbles 23 therein. As a method of dispersing the bubbles 23 in the edible film 20, a bubble is formed by sending air in the atmosphere into the material of the liquid edible film 20 and dispersing it. A gas-mixing stirring method in which a foam-containing liquid is applied on a base and dried is exemplified, but the method is not limited to this method, and a well-known method can be used. However, a method using a chemical substance such as a foaming agent (surfactant) is not preferable from the viewpoint of food safety.

The adhesive layer 30 is provided on both the front and back surfaces of the edible film 20 and is made of an edible material.
As the edible material constituting the adhesive layer 30, for example, a well-known edible adhesive such as starch syrup, starch paste, natural gum, shellac and the like can be used.
As described below, a metal layer is attached to the adhesive layer 30a provided on the surface of the edible film 20, and an adhesive layer 30b provided on the back surface of the edible film is attached to the surface of food or the like.

The metal foil 40 is attached only to the adhesive layer 30a on the surface side among the adhesive layers 30a and 30b provided on both surfaces of the edible film 20.
Examples of the metal constituting the metal foil 40 include, but are not limited to, single metals such as gold, silver, copper, platinum, and alloys of these metals. In particular, if the metal contains at least one of gold, silver, copper, and platinum, it is preferable in terms of obtaining the effect of improving the safety to the human body and the elasticity and moisture retention of the skin. The thickness of the metal foil 40 can be adjusted as appropriate, but is generally about 0.1 to 1.5 μm.
Further, as the metal foil 40, it is preferable to use a metal foil formed by a traditional foil punching process. It is known that metal foils made from traditional foil punching processes use less chemical substances compared to industrially manufactured metal foils such as sputtering, so that there is no adverse effect on the human body if the amount is appropriate. Therefore, the safety when the edible metal foil 10 is used for foods and cosmetics can be improved. Moreover, you may use the edible metal foil manufactured by industrial methods, such as sputtering method, a vacuum evaporation method, or an ion plating method.

When the edible metal foil 10 of the present invention having the above configuration is placed on the surface of a food containing moisture or floated on the surface of a beverage, the adhesive layers 30a and 30b support both the front and back surfaces of the edible film 20. In addition, since moisture hardly reaches the edible film 20, deformation due to moisture absorption hardly occurs.
Then, after a certain time has passed, the moisture reaches the edible film 20 and is absorbed, so that the edible metal foil 10 tries to deform as a whole film while being partially dissolved, but the adhesive layer 30a Since both the front and back surfaces are supported by 30b and 30b, in practice, deformation hardly occurs, and the appearance of the edible metal foil 10 can be maintained in a good state for a long time.

In addition, when the edible film 20 includes a large number of bubbles 23 as in the present embodiment, when the edible metal foil 10 is floated on the surface of the beverage, the edible film 20 mainly includes the bubble 23 portion after a certain period of time. Therefore, the metal foil 40 is disintegrated and dissolved together with the metal foil 40, and thereby the metal foil 40 is dispersed in the beverage.
Further, as shown in FIG. 2, when the edible film 20 of the edible metal foil 11 does not include the bubbles 23, the strength of the edible film 20 is higher than the case where the bubbles 23 are provided, so the edible film Even when 20 absorbs a certain amount of water, it does not easily disintegrate or dissolve, and the appearance of the edible metal foil 10 can be maintained in a good state for a longer time.
In the present embodiment, the back surface 21 of the edible film 20 is configured as a rough surface, but may be configured as a smooth surface as shown in FIG. In the case of a smooth surface, the manufacturing process of the edible film 20 and the edible metal foil 12 can be simplified.

  The present invention is an edible metal foil that is easy to handle and has a low production cost, and a food and cosmetic using the edible metal foil, and has industrial applicability.

10 Edible metal foil
11 Edible metal foil
12 Edible metal foil
20 Edible membrane
21 Back
22 Surface
23 Air bubbles
30 Adhesive layer
30a Adhesive layer on the front side
30b Adhesive layer on the back side
40 metal foil

Claims (8)

  An edible metal foil comprising: an edible film; an edible adhesive layer provided on both surfaces of the edible film; and a metal foil attached to only one of the adhesive layers on both surfaces.   2. The edible metal foil according to claim 1, wherein the degree of deformation of the edible film is adjusted by changing the thickness or material of each of the adhesive layers on both sides.   3. The edible according to claim 1 or 2, wherein a surface of the edible film on which the metal foil is not attached is formed to be rougher than a surface on which the metal foil is attached. Metal foil.   The edible metal foil according to any one of claims 1 to 3, wherein the edible film has a large number of bubbles therein.   The edible metal foil according to any one of claims 1 to 4, wherein the metal foil contains at least one of gold, silver, copper, and platinum.   6. The metal foil according to any one of claims 1 to 5, wherein the metal foil has an edible property produced by any one of a traditional foil casting process, a sputtering method, a vacuum deposition method, and an ion plating method. The edible metal foil according to item.   A food comprising the edible metal foil according to any one of claims 1 to 6. A cosmetic comprising the edible metal foil according to any one of claims 1 to 6.

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