JPH0940031A - Packaging sheet for high-frequency heat cooking - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging sheet for heat-cooking with high frequency which is suitable for a heating and cooking method for fast food or taken-out food not only to provide softness or hardness according to customer's taste but also to brown the food or add crispiness. SOLUTION: A paper layer 4 and a heat insulating layer 5 are laminated sequentially on a side of a vapor deposition layer 3 of a vapor deposition film 1 including the metal vapor deposition layer 3 as thick as 60Å or less on one of faces of a heat insulating film 2. Alternatively, the heat insulating layer 5 is laminated on a side of the vapor deposition layer 3 of the vapor deposition film 1 including the metal vapor deposition layer 3 as thick as 60Å or less on one of faces of the heat insulating film 2, while the paper layer 4 is laminated on a side of the heat insulating film 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet for heating and cooking foods by using high frequency waves or browning, which is wrapped around the foods at the time of heating or eating. The present invention relates to a packaging sheet for high-frequency heating cooking, which is used after being packaged into a package.

[0002]

2. Description of the Related Art As a sheet for heating and cooking food by using high frequency, there has been a packaging sheet material for microwave ovens.

[0003] Further, as a sheet for heating food by heating it with high frequency so that it is browned or the like, there is a packaging sheet material for microwave oven having heat generation property.

The above-mentioned heat-generating packaging sheet for microwave oven is
Ultra-thin aluminum film made of heat-resistant plastic film by vacuum deposition method (conductive material made into a relatively high electric resistance film by an ultra-thin film of about 60Å, for example)
Is formed, and paper is laminated on the vapor deposition surface via an adhesive.

Since the heat-generating packaging sheet for a microwave oven has an extremely thin aluminum vapor-deposited layer, the high frequency (microwave) of the microwave oven does not cause reflection like ordinary aluminum foil, and most microwave ovens do not generate reflection. The waves are converted and absorbed as Joule heat due to the electric resistance of the ultrathin film, or transmitted through the vapor deposition layer of the ultrathin film.

The microwave absorbed in the vapor deposition layer heats the vapor deposition layer as Joule heat, while the transmitted microwave heats the food.

Such a heat-generating packaging sheet for a microwave oven is used, for example, as a package with a heating element for a microwave oven by being attached to the inside of a carton or the bottom of a tray.

[0008]

In recent years, with the development of the fast food industry, the spread of takeaway foods such as french fries, fried chicken, hot dogs and hamburgers has been remarkable, and more rapid. An instant cooking method by operation has been required.

In the quick instant heat treatment of the above-mentioned take-out food, not only the softness and hardness corresponding to the customer's taste, but also the heating for quickly giving a brown mark or giving a crispiness (crispiness) depending on the food. A recipe is needed.

An object of the present invention is to provide a packaging sheet for high-frequency cooking, which is suitable for a cooking method that gives food a browning or crispy feeling.

[0011]

The first invention of the present invention is as follows:
A high-frequency wave characterized in that a paper layer 4 and a heat insulating layer 5 are sequentially laminated on the vapor deposition layer 3 side of a vapor deposition film 1 having a metal vapor deposition layer 3 having a film thickness of 60 Å to 150 Å or less on one surface of a heat resistant film 2. It is a packaging sheet for heating and cooking.

Next, a second invention of the present invention is that the heat-resistant film 2 has a metal vapor deposition layer 3 having a film thickness of 60 Å to 150 Å or less on one surface.
A heat insulating layer 5 is provided on the side of the vapor deposition layer 3 of the vapor deposition film 1 provided with
Is a packaging sheet for high frequency heating cooking, wherein a paper layer 4 is laminated on the heat resistant film 2 side.

Further, in the first aspect of the present invention, the main panel 11 and the side panel 11 connected to the left and right outer ends of the panel 11 through the folds a and a, respectively.
It is a packaging sheet for high frequency heating and cooking constituted by a and 11a.

Further, in the second aspect of the present invention, the main panel 11 and the side panel 11 connected to the left and right outer ends of the panel 11 through the folds a and a, respectively.
It is a packaging sheet for high frequency heating and cooking constituted by a and 11a.

Further, in the present invention according to the first aspect of the present invention, the sub-panels 11b and 1b, which are connected to the left and right outer ends of the side panels 11a and 11a via folds b and b, respectively.
It is a packaging sheet for high frequency heating cooking provided with 1b.

In the second aspect of the present invention, the sub-panels 11b and 1b connected to the left and right outer ends of the side panels 11a and 11a via folds b and b, respectively.
It is a packaging sheet for high frequency heating cooking provided with 1b.

Further, in the present invention according to the first aspect of the present invention, the main panel 11 and the side panels 12 and 12 connected to the left and right sides of the main panel 11 via folds a and a, respectively.
And side panels 13 and 13 which are continuously provided above and below the panel 11 through folds c and c, extended folds a1 and a1 of the folds a and extended folds c1 of the folds c, respectively. ,
Connection panels 14, 14, 14, 14 for connecting the panels 12, 13 connected to each other via c1 to each other, and connecting the corners of the main panel 11 and the outer corners of the connection panel 14, respectively. It is a packaging sheet for high-frequency heating and cooking, which has diagonal folds d formed as described above.

Further, in the present invention according to the first aspect of the present invention, the main panel 11 and the side panels 12 and 12 connected to the left and right sides of the main panel 11 through the folds a and a, respectively.
And side panels 13 and 13 which are continuously provided above and below the panel 11 through folds c and c, extended folds a1 and a1 of the folds a and extended folds c1 of the folds c, respectively. ,
Connection panels 14, 14, 14, 14 for connecting the panels 12, 13 connected to each other via c1 to each other, and connecting the corners of the main panel 11 and the outer corners of the connection panel 14, respectively. It is a packaging sheet for high-frequency heating and cooking, which has diagonal folds d formed as described above.

The present invention also provides the above-mentioned first invention or second invention.
In the invention, the heat-resistant film 2 is a polyethylene terephthalate film, and the metal layer 3 is an aluminum vapor deposition layer, which is a packaging sheet for high-frequency heating and cooking.

The present invention also provides the above-mentioned first invention or second invention.
In the invention, the heat insulating layer 5 is a packaging sheet for high frequency heating and cooking, which is formed of a synthetic resin foam sheet.

The present invention also provides the above-mentioned first invention or second invention.
In the invention, the heat insulating layer 5 is a packaging sheet for high frequency heating and cooking, which is formed of a corrugated liner sheet.

The present invention also provides the above-mentioned first invention or second invention.
In the invention, the heat insulating layer 5 is a packaging sheet for high-frequency heating and cooking, which is formed by an embossed sheet having an uneven pattern.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION The packaging sheet for high frequency heating and cooking according to the first invention will be described in detail below with reference to a side sectional view of the packaging sheet A for high frequency heating and cooking according to the embodiment of the invention of FIG.

The high-frequency cooking packaging sheet A has a thickness of 0.05 mm to 0.15 m as the metal vapor deposition film 1.
m, or on one surface of the heat resistant film 2 having a thickness of about 0.15 mm to 0.25 mm, a film thickness of 50 made of aluminum metal.
An extremely thin metal vapor deposition layer 3 having a thickness of about 80 Å is formed. The heat-resistant film may be transparent or opaque, or may be colored, and a resin film such as a polyethylene terephthalate film is suitable, but is not particularly limited in the present invention.

On the surface of the metal vapor-deposited layer 3 of the metal vapor-deposited film 1, a paperboard such as a cardboard of about 0.25 mm to 0.30 mm, 0.10 mm to 0.25 mm, is attached with an adhesive.
Thin paper (coated paper, fine paper) or 0.05m
A paper layer 4 made of thin paper such as paraffin paper having a thickness of about m to 0.10 mm is laminated.

Further, the paper layer 4 is bonded to the paper layer 4 with an adhesive.
Thickness 0.1mm-0.3mm, or 0.3mm-
A heat insulating layer 5 made of a synthetic resin foam sheet having a thickness of about 0.5 mm is laminated.

The heat insulating layer 5 is a foam layer or a foam sheet layer having a hollow portion 5a of closed cells or open cells (preferably closed cells) which are expanded by heating after applying a heat-foaming resin. The layer thickness of the heat insulating layer 5 is
The layer thickness after foaming.

In addition, as the heat insulating layer 5, a cavity (regular space portion) is formed by a corrugated corrugated sheet in which a corrugated sheet in which paper is embossed in an uneven corrugated shape and a flat liner sheet are laminated and stuck. It may be a corrugated cardboard sheet (corrugated liner sheet) provided inside, or may be an embossed sheet in which paper is embossed in an uneven dot shape to form a cavity (space) by embossing, the thickness of the corrugated cardboard sheet, or The unevenness height of the embossed sheet is the thickness of the heat insulating layer 5.

The packaging sheet for high-frequency heating and cooking of the second invention will be described in detail below with reference to a side sectional view of the packaging sheet B for high-frequency heating and cooking according to another embodiment of the invention of FIG.

The high-frequency cooking packaging sheet B has a thickness of 0.05 mm to 0.15 mm made of polyethylene terephthalate resin, or 0.
On one surface of the heat-resistant film 2 having a thickness of about 15 mm to 0.25 mm, an extremely thin metal vapor deposition layer 3 made of aluminum metal and having a thickness of about 50 to 80 Å is formed.

On the surface of the metal vapor-deposited layer 3 of the metal vapor-deposited film 1, a paperboard such as a cardboard of about 0.25 mm to 0.30 mm, 0.10 mm to 0.25 mm, is attached with an adhesive.
Thin paper (coated paper, fine paper) or 0.05m
A paper layer 4 made of thin paper such as paraffin paper having a thickness of about m to 0.10 mm is laminated.

On the surface of the heat resistant film 2, a heat insulating layer 5 made of a synthetic resin foam sheet having a thickness of about 0.1 mm to 0.3 mm or 0.3 mm to 0.5 mm is provided with an adhesive agent. Are laminated.

The heat insulating layer 5 is a foam layer provided with closed cells or open cells (preferably closed cells are good) which are heated and expanded after applying a heat-foamable resin, or a foam sheet layer. The layer thickness of 5 is the layer thickness after foaming.

In addition, the heat insulating layer 5 may be a corrugated cardboard sheet in which a corrugated sheet in which paper is embossed in a corrugated shape and a flat liner sheet are laminated and pasted together, or the paper is in the shape of irregular dots. It may be an embossed embossed sheet, and the thickness of the corrugated cardboard sheet or the height of the unevenness of the embossed sheet is the layer thickness of the heat insulating layer 5.

Packaging sheet A for high-frequency cooking according to the present invention
Is a film with a thickness of 60Å ~ 150Å on one side of the heat resistant film 2.
Since the paper layer 4 and the heat insulating layer 5 were sequentially laminated on the vapor deposition layer 3 side of the vapor deposition film 1 having the following ultra-thin metal vapor deposition layer 3, the sheet A should be in contact with the heat resistant film 2. When the food F is wrapped in a microwave oven and heated in a microwave for high frequency heating, the high frequency penetrates the vapor deposition layer 3 to heat the food F to impart appropriate softness and vapor deposition of an extremely thin film that generates heat. The heating and drying of the surface of the food F adjacent to the layer 3 can be promoted to give a suitable crispy (crispiness) feeling to the surface.

Further, the vapor deposition layer 3 heated by high frequency
Since the heat conduction from the sheet to the outer surface of the sheet A is suppressed by the heat insulating layer 5, the food F can be held by hand from the outside of the sheet A without feeling the heat relatively even immediately after cooking, or the heat can be relatively heated. The food F can be held and eaten through the sheet A without feeling.

The packaging sheet B for high frequency cooking of the present invention has a film thickness of 60Å to 150 on one surface of the heat resistant film 2.
Å Evaporated film 1 with ultra-thin metal evaporation layer 3
A heat insulating layer 5 on the vapor deposition layer 3 side of the heat resistant film 2
Since the paper layers 4 are respectively laminated on the sides, in the sheet B,
When the food F is wrapped so as to be in contact with the paper layer 4 and placed in a microwave oven for high frequency heating, the high frequency penetrates the vapor deposition layer 3 to heat the food F, and the water content of the food F evaporated by heating is The surface of the food F is absorbed by the paper layer 4 to promote drying, and the vapor deposition layer 3 generates heat to give the surface of the food F a crispy (crisp) feeling and a browning.

Further, the vapor deposition layer 3 heated by high frequency
The heat conduction from the sheet A to the outer surface of the sheet A is suppressed by the heat insulating layer 5, and the food F can be held and taken out from the outside of the sheet A by hand without feeling the heat relatively even immediately after cooking, and also relatively. The food F can be held and eaten through the sheet A without feeling the heat.

The heat-resistant film 2, the paper layer 4, and the heat insulating layer 5 of the high-frequency cooking packaging sheet A or sheet B of the present invention can be appropriately set in thickness. By making the sheet A B thin and flexible, the food F
It is possible to wrap it to adapt to the shape of.

Further, the packaging sheet A or sheet B for high frequency heating and cooking according to the present invention is divided into panel shapes of various shapes through folds, and is folded, for example, as described in claims 3 to 8. It can be used by forming it into a simple tray shape through the eyes.

[0041]

EXAMPLES Specific examples of the present invention will be described in detail below with reference to FIGS. FIG. 3A is a plan view of an embodiment of the packaging sheet A for high frequency heating and cooking according to the first invention of the present invention or the packaging sheet B for high frequency heating and cooking according to the second invention.

As shown in FIG. 3A, a main panel 11 is formed in the central portion of the rectangular sheet A or sheet B, and a fold a is formed at both ends of the main panel 11 facing each other. , A, the side panels 11a and 11a are connected in series.

Then, as shown in FIG. 3 (b), the sheet A or sheet B is bent along the folds a and a in the same direction so that the heat insulating layer 5 is on the outer side, The panels 11a, 11a are folded up from the main panel 11 so as to face each other to form a tray.

The food F to be heated such as a hot dog and a hamburger is placed on the main panel 11 and held by the main panel 11 and the side panels 11a and 11a and loaded into the microwave oven. Alternatively, the food F is heated to a temperature at which it can be easily eaten or heated to a high temperature by radiating a high frequency from the side of the main panel 11 for cooking, and an ultrathin film laminated on the main panel 11 and the side panel 11a by the high frequency. The metal vapor-deposited layer 3 is heated to evaporate the surface-containing water of the food F adjacent to the metal vapor-deposited layer 3, and the surface thereof is browned.

After the heating and cooking, the food F is taken out from the microwave oven together with the sheets A or B, and the food F is appropriately grasped and eaten via the sheets A or B.

FIG. 4 (a) is a plan view of another embodiment of the high-frequency cooking packaging sheet A according to the first invention or the high-frequency cooking packaging sheet B according to the second invention.

As shown in FIG. 4 (a), a main panel 11 is formed at the center of the rectangular sheet A or sheet B, and a fold a is formed at both ends of the main panel 11 facing each other. , A are connected in series with side panels 11a, 11a, and sub-side panels 11b are connected in series at the outer ends of the side panels 11a via folds b.

Then, as shown in FIG. 4B, the sheet A or the sheet B is oriented in the same direction along the folds a, a, b, b so that the heat insulating layer 5 is on the outside. The side panels 11a and 11a are folded up from the main panel 11 so as to face each other, and the sub side panel 11b is parallel to the main panel 11 to form a tray.

A food F to be heated such as a hot dog or a hamburger is placed on the main panel 11 and held by the main panel 11 and the side panels 11a and 11a and the sub side panels 11b and 11b.
By loading in a microwave oven and radiating a high frequency from the food F side or the main panel 11 side, the food F is warmed to a temperature at which it can be easily eaten or heated to a high temperature, and the main panel 11 and the side panel are heated by the high frequency. By heating the ultra-thin metal vapor deposition layer 3 laminated on the sub-side panel 11b and 11a to evaporate the water content of the surface of the food F close to the metal vapor deposition layer 3, the surface of the food F is browned.

FIG. 5 (a) is a plan view of another embodiment of the packaging sheet A for high frequency heating and cooking according to the first aspect of the present invention or the packaging sheet B for high frequency heating and cooking according to the second aspect of the present invention.

As shown in FIG. 5 (a), a main panel 11 is formed in the central portion of the rectangular sheet A or sheet B, and folds a are formed at the opposite left and right ends of the main panel 11. , A side panels 12 and 12 are continuously provided via the side panels 13a and 13a, and side panels 13 and 13 are provided on the upper and lower end portions of the main panel 11 facing each other via folds c and c.
Are connected.

Also, the folds a, along folds a1, a1 of the a
, Connecting panels 14, 14, 14, 14 respectively connected to the side panels 12, 13 via the extended folds c1, c1 of the folds c, c are respectively connected to each other, and each panel 14 is provided with a main panel. Each corner of panel 11 and panel 14
An oblique fold d connecting the outer corners of the is provided.

Then, as shown in FIG. 5B, the sheet A or the sheet B is the same along the folds a, a, c, c so that the heat insulating layer 5 is on the outside. Side panels 12, 12, 13, 13
Are folded up from the main panel 11 so as to face each other.

Further, the extended folds a1, a1, c1, c1 are bent in the opposite direction (or in the same direction) as the folds a, a, c, c, and the diagonal fold d is extended folds a1, a1, c1,
The sheet A or sheet B is formed into a tray by bending the sheet in the direction opposite to c1 and stacking the triangular panels 14a of the connecting panel 14 on top of each other and on the outer surface (or inner surface) of the side panel 12 or side panel 13. .

A food F to be heated such as a hot dog or a hamburger is placed on the main panel 11 and held by the main panel 11 and the side panels 11a and 11a and the sub-side panels 11b and 11b.
The food F is loaded into a microwave oven and irradiated with a high frequency from the food F side or the main panel 11 side to heat the food F to a temperature at which it can be easily eaten or heated to a high temperature. Ultra-thin metal vapor deposition layer 3 laminated on 12 and 13
Is heated to evaporate the surface-containing water of the food F close to the metal vapor deposition layer 3 and at the same time, the surface of the food F is browned.

[0056]

EFFECT OF THE INVENTION The packaging sheet for high-frequency cooking according to the present invention is a moderately soft or appropriately dried hard food corresponding to the customer's preference in the rapid heat treatment of fast foods for breakfast, lunch and dinner and takeaway foods. Not only can it be added to the texture, but it can also be given a crispy feeling (crispness) or a suitable browning that corresponds to the food, if necessary, as a heating packaging sheet for easy wrapping and high frequency heating. It is also effective as a carrying sheet for holding food when eating.

[Brief description of drawings]

FIG. 1 is a side sectional view of an embodiment of a packaging sheet for high-frequency heating cooking according to the first invention.

FIG. 2 is a side sectional view of an embodiment of a packaging sheet for high frequency heating cooking according to the second invention.

FIG. 3A is a plan view of an embodiment of the packaging sheet for high-frequency heating and cooking according to the first invention or the second invention, and FIG.
Is the assembly drawing.

FIG. 4A is a plan view of another embodiment of the packaging sheet for high frequency heating and cooking according to the first invention or the second invention,
(B) is the assembly drawing.

FIG. 5A is a plan view of another embodiment of the packaging sheet for high-frequency heating and cooking according to the first invention or the second invention,
(B) is the assembly drawing.

[Explanation of symbols]

A, B ... Packaging sheet for high frequency cooking 1 ... Metal vapor deposition film 2 ... Heat resistant film 3 ... Metal vapor deposition layer 4 ... Paper layer 5 ... Thermal insulation layer 11 ... Main panel 11a ... Side panel 11b ...
Sub-side panels 12, 13 ... Side panels 14 ... Connection panels a-d ... Folds F ... Food

 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Junichi Homma 1-5-1 Taito, Taito-ku, Tokyo Within Toppan Printing Co., Ltd. (72) Inventor Keita Saiki 1-5-1 Taito, Taito-ku, Tokyo Toppan Imprint Co., Ltd.

Claims (12)

[Claims] 1. A film thickness of 60Å to 1 on one surface of the heat resistant film 2.
A packaging sheet for high-frequency heating and cooking, wherein a paper layer 4 and a heat insulating layer 5 are sequentially laminated on the vapor deposition layer 3 side of a vapor deposition film 1 having a metal vapor deposition layer 3 of 50 Å or less. 2. A film thickness of 60Å to 1 on one surface of the heat resistant film 2.
A packaging sheet for high frequency heating and cooking, characterized in that a heat insulating layer 5 is laminated on the vapor deposition layer 3 side of a vapor deposition film 1 having a metal vapor deposition layer 3 of 50 Å or less, and a paper layer 4 is laminated on the heat resistant film 2 side. . 3. The high-frequency cooking package according to claim 1, comprising a main panel 11 and side panels 11a, 11a connected to the left and right outer ends of the panel 11 via folds a, a respectively. Sheet. 4. The package for high frequency heating and cooking according to claim 2, which comprises a main panel 11 and side panels 11a, 11a connected to the left and right outer ends of the panel 11 via folds a, a respectively. Sheet. 5. A sub-panel 1 continuous with left and right outer ends of the side panels 11a, 11a via folds b, b, respectively.
The packaging sheet for high frequency heating and cooking according to claim 3, comprising 1 b and 11 b. 6. A sub-panel 1 continuous with the left and right outer ends of the side panels 11a, 11a via folds b, b, respectively.
The packaging sheet for high frequency heating and cooking according to claim 4, comprising 1b and 11b. 7. A main panel 11 and a side panel 1 connected to the left and right sides of the panel 11 through folds a and a, respectively.
2, 12 and folds c, c above and below the panel 11, respectively
And side panels 13 and 13 that are connected to each other via the extended folds a1 and a1 of the folds a and the extended folds c1 and c1 of the folds c, respectively.
Connecting panels 14, 14, 14, 14 for connecting
2. The packaging sheet for high-frequency heating and cooking according to claim 1, further comprising an oblique fold d formed so as to connect each corner of the main panel 11 and an outer corner of each of the connecting panels 14. 8. A main panel 11 and a side panel 1 connected to the left and right sides of the panel 11 via folds a and a, respectively.
2, 12 and folds c, c above and below the panel 11, respectively
And side panels 13 and 13 that are connected to each other via the extended folds a1 and a1 of the folds a and the extended folds c1 and c1 of the folds c, respectively.
Connecting panels 14, 14, 14, 14 for connecting
3. The packaging sheet for high frequency cooking according to claim 2, further comprising: an oblique fold d formed so as to connect each corner of the main panel 11 and an outer corner of each of the connecting panels 14. 9. The packaging sheet for high frequency cooking according to claim 1, wherein the heat resistant film 2 is a polyethylene terephthalate film, and the metal layer 3 is an aluminum vapor deposition layer. 10. The packaging sheet for high-frequency cooking according to claim 1, wherein the heat insulating layer 5 is formed of a synthetic resin foam sheet. 11. The packaging sheet for high-frequency cooking according to claim 1, wherein the heat insulating layer 5 is formed of a corrugated liner sheet. 12. The packaging sheet for high frequency heating and cooking according to claim 1, wherein the heat insulating layer 5 is formed of an embossed sheet having an uneven pattern.