JP2004299759A - Packing container for raw bean curd skin, and manufacturing method for raw bean curd skin contained in packing container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packing container for raw bean curd skin which can heat-sterilize raw bean curd skin without spoiling the flavor of raw bean curd skin, and without generating troubles such as the breakage of the container body or the peeling (defective sealing) of a lid member, and a manufacturing method for a raw bean curd skin contained in a packing container using this container. <P>SOLUTION: This packing container 100 has a container body 10 for housing raw bean curd skin, and the lid member 20 for sealing the opening 10A of the container body. On a flat surface-shape wall section 11 provided at least at a part of the container body 10, a recess 12 sinking to the inside of the container body is provided. The recess 12 is formed in such a manner that the recess 12 stays as a recess under a normal state, but can be inverted into a protrusion projecting to the outside of the container body 10 by the increase of the container internal pressure when the opening 10A of the container body 10 is sealed by the lid member 20, and the container is heated. At the time of the heat-sterilization of raw bean curd skin, the recess 12 is inverted to the protrusion projecting to the outside of the container body when the packing container is heated, and then, is inverted to the recess 12 again from the protrusion when the packing container is cooled to a room temperature. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pack container for raw yuba and a method for producing raw yuba in a packed container in which raw yuba that has been heat-sterilized is enclosed.
[0002]
[Prior art]
Yuba is a thin film formed on the liquid surface when soymilk is heated, and is a highly nutritious food rich in protein and lipid. In general, the thinned-up thin film itself is particularly called raw yuba. Yuba is often used for vegetarian cuisine, and is eaten as a Japanese dish, bowl type, boiled food, fried food, etc., but it is delicious even if you eat raw yuba as it is.
[0003]
Due to the recent boom in gastronomy and healthy tastes, demand for raw yuba has increased, and just like tofu, raw yuba is packaged in a package (a container with the opening of the plastic container body sealed with a plastic film) and sold. (Shipping) has been done. Also, in such raw yuba in a packed container, as in the case of tofu in a packed container, in order to prolong the shelf life, the raw yuba is sealed in the packed container, and then heated together with the packed container to form a raw yuba. Heat sterilization has been performed. However, as a result of the study of the present inventors, the heat sterilization of such raw yuba is performed by filling the pack container with water together with raw yuba, so that the raw yuba is boiled by heating and the flavor of the raw yuba is impaired. It turned out to be a problem.
[0004]
Therefore, in order to heat sterilize the raw yuba sealed in the pack container so as not to impair the flavor, air is sealed in the container together with the raw yuba without filling the container with water, and the raw yuba is placed in the air in the container. Is preferably heated, but in this case, when the pack container is heated, the air inside the pack container expands due to the heating, so that the container body is damaged or deformed, or a plastic film for sealing is used. Peeling (poor sealing) may occur.
[0005]
In addition, as for a pack container for tofu, for example, as described in Patent Literature 1 below, a pack container elaborated for various purposes has been proposed. In the past, there has been little practice, and there has been almost no proposal of an invention of a pack container for raw yuba. Also, for example, as disclosed in Patent Literatures 2 and 3 below, many proposals have been made for the invention of a method for producing tofu (sterile tofu) in a packed container, but the invention of a method for producing raw yuba in a packed container has been proposed. The fact is that no proposal has been made.
[0006]
[Patent Document 1]
JP 2001-55286 A [Patent Document 2]
JP 2000-83615 A [Patent Document 3]
Japanese Patent Application Laid-Open No. 10-286073
[Problems to be solved by the invention]
The present invention provides a raw yuba without enclosing the raw yuba and heating the whole pack container without impairing the flavor of the raw yuba and without causing problems such as breakage of the container body and peeling of the lid material (poor sealing). Provided is a pack container for raw yuba that can be sterilized by heating, and a method for producing raw yuba in a pack container using the container.
[0008]
[Means for solving the problem]
In order to achieve the above object, the present invention employs the following configurations.
That is, the present invention
(1) A pack container enclosing raw yuba,
A container body for storing raw yuba,
A lid member for sealing the opening of the container body,
At least a part of the container body forms a planar wall portion, and the planar wall portion is a concave portion recessed toward the inside of the container body, and the opening of the container body is sealed with a lid material. A concave portion which can be inverted to a convex portion protruding to the outside of the container main body due to an increase in the container internal pressure when the container is heated is provided,
The size of the concave portion is a size that reduces the volume by 15 to 50% with respect to the volume of the container body when the planar wall portion does not have the concave portion. Pack container,
(2) The pack container for raw yuba as described in (1) above, wherein the planar wall portion provided with the concave portion is a bottom wall portion of the container body.
(3) The pack container for raw yuba as described in (1) or (2) above, wherein the concave portion is formed by forming a container wall into a truncated pyramid shape, and (4) any of (1) to (3) above. The raw yuba was sealed in the pack container described in Crab together with air or / and an inert gas, and the pack container in which the raw yuba was sealed was heated, and provided on the container body of the pack container simultaneously with the heat sterilization of the raw yuba. A method of manufacturing raw yuba in a pack container, wherein the concave portion is inverted to a convex portion protruding to the outside of the container body, and then the pack container is cooled to room temperature and the convex portion is inverted to the concave portion. , Concerning.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is a front view of a pack container for fresh water leaves according to an example of the present invention. FIG. 1 (A) is a diagram showing a state before the opening of the container body is sealed with a lid member, and FIG. 1 (B) is an opening of the container body. FIG. 3 is a diagram showing a state in which is sealed with a lid material. FIG. 2 is a plan view of the container body 10 in FIG. 1, and FIGS. 3A and 3B are cross-sectional views taken along lines IIIa-IIIa and IIIb-IIIb in FIG.
[0010]
As shown in an example of the pack container 100 shown in FIGS. 1 to 3, the pack container for raw yuba of the present invention includes a container main body 10 for storing raw yuba and a lid for sealing the opening 10 </ b> A of the container main body 10. The container body 10 has at least a part thereof as a planar wall portion 11, and the planar wall portion 11 is provided with a concave portion 12 which is depressed toward the internal space side of the container body.
[0011]
Here, the concave portion 12 provided in the container main body 10 remains in a concave state as shown in FIGS. 1 to 3 in a normal state (that is, a state where the pack container is not heated). The container 10A is sealed with the lid member 20 (the state shown in FIG. 1B), and by heating the pack container 100 in the sealed state, the air inside the container expands (the internal pressure of the container increases), so that the outer side of the container body 10 is opened. It is formed so as to be able to be inverted to a convex portion protruding. FIGS. 4A and 4B show a state where the pack container 100 is heated and the concave portion 12 provided in the container main body 10 is turned into a convex portion 13. 4A and 4B are cross-sectional views taken along a cutting line corresponding to the cross section of the container body 10 shown in FIGS. 3A and 3B.
[0012]
In the present invention, the constituent material of the container body 10 can be used without limitation as long as it is a flexible material that enables the concave portion 12 to be turned into the convex portion 13 by heating the container. A similar plastic material is used. Specific examples include a molded article obtained by molding a plastic such as high-density polyethylene, polypropylene, and polyvinylidene chloride. Among them, a molded article of polypropylene is preferable in terms of heat resistance, hygiene and the like. Further, as the cover member 20, a heat-sealing film material used for a cover member of a known food pack container can be applied as it is, and specifically, a polyethylene film, a polypropylene film, a polyester film, a polyamide (nylon) Examples thereof include a film or the like, a laminated plastic film in which two or more kinds selected from these are laminated, a composite film in which silicon oxide is further deposited on these plastic films, or a metal foil such as an aluminum foil is laminated.
[0013]
FIG. 5 shows a state in which raw yuba 30 is stored in the container main body 10 using the pack container 100, the opening of the container main body 10 is sealed with the lid member 20, and the raw yuba 30 is sealed in the container 100 together with air. ing.
[0014]
As shown in FIG. 5, the pack container of the present invention is subjected to a heat treatment for sterilizing the raw yuba 20 according to a conventional method, after the raw yuba 300 is sealed in the inside together with air. That is, by directly heating the pack container in which the raw yuba is enclosed with the air, the raw yuba is heated and sterilized in the air in the pack container, and the raw yuba in the packed container is filled with the heat-sterilized raw yuba. Is manufactured. Therefore, in the present invention, "to heat the pack container" means to heat the pack container at a temperature at which the raw yuba sealed inside is sterilized, which is the same as boil sterilization treatment of general packed food. And heating the pack container in a sealed state at about 60 to 95 ° C. (preferably 80 to 90 ° C.) for about 20 minutes to 1.5 hours (preferably 20 minutes to 1 hour). The concave portion 12 remains in a normal state (before heating), and can be inverted to the convex portion 13 due to an increase in the container internal pressure when the pack container is heated to the above set temperature.
[0015]
FIG. 6 shows that the pack container 100 (FIG. 5) in which the raw yuba 30 is sealed together with air is heated to the above-mentioned set temperature to sterilize the raw yuba, and at this time, the concave portion 12 provided in the container body 10 becomes the convex portion 13. It is in a reversed state. In other words, by using the pack container 100 of the present invention, the raw yuba 30 is heat-sterilized in the air in the container 100 by heating the container 100. Is reversed to the convex portion 13 to increase the volume in the container, and the increase in the container internal pressure is alleviated, so that damage and deformation of the container 100 and poor sealing (peeling of the lid member 20) are prevented. On the other hand, when the heating of the pack container 100 is stopped, the pack container 100 is naturally cooled to room temperature, the internal pressure of the container is reduced by this cooling, and the convex portion 13 reverses to the concave portion 12 again (returns to the state of FIG. 5). ). That is, as described above, the container main body 10 is usually formed of a plastic molded body. When the container main body 10 is cooled to room temperature and the internal pressure of the container is reduced, the container main body 10 returns to the original shape by molding. . Therefore, the final product (“raw yuba in a pack container”) after the heating of the pack container (heat sterilization of raw yuba) is in the state of FIG. 5, and is shipped and sold in this state.
[0016]
In the pack container of the present invention, the overall shape of the container main body and the position of the concave portion provided in the container main body can be variously changed, but the raw yuba is a soft gel-like thin film, and usually, several layers are stacked to several layers. It is folded and stored as a rectangular gel body with a thickness of several millimeters to several centimeters, so the shape of the container body is a tray shape with a relatively low side wall height according to the storage form of such raw yuba Is preferred. Therefore, as shown in the examples shown in FIGS. 1 to 5, when the container body 10 is formed in a tray shape and the concave portion 12 is formed in the flat wall portion 11 of the bottom wall portion, the container body is compact, The pack container 100 in which the provided concave portion 12 can be smoothly inverted to the convex portion 13 can be configured. That is, in the present invention, the container body may have a curved wall portion, and a concave portion may be provided on the curved wall portion. Inversion, or the inversion from the convex portion to the concave portion may be difficult to occur smoothly, the container body having a flat wall portion, particularly, a tray-shaped container body having a bottom wall having a flat wall portion. By forming the concave portion with respect to the bottom wall portion, it is possible to form a concave portion capable of sufficiently alleviating a rise in the internal pressure of the container when the container is heated, without increasing the depth of the concave portion so much. It is possible to constitute a pack container in which the reversal from the to the concave portion occurs smoothly.
[0017]
In the pack container of the present invention, it is important that the size of the concave portion provided in the container body is set to a size that reduces the internal volume by 15 to 50% with respect to the internal volume of the pack container when the concave portion is not provided. It is.
[0018]
That is, although there is a slight degree of difference depending on the overall shape of the container body and the like, the size of the concave portion exceeds the internal volume of the pack container (the internal volume of the pack container without the concave portion) by more than 50%. When the size is set to be reduced, there is a possibility that inversion from the concave portion to the convex portion when the container is heated may not easily occur, and an area for accommodating raw yuba in the container body becomes small, and For this reason, it is necessary to increase the size of the pack container (container body) itself. On the other hand, when the size of the concave portion is set to reduce the inner volume of the pack container within a range of less than 15%, the volume of the convex portion formed by inversion is small. Of the container cannot be sufficiently mitigated, and damage to the container and defective sealing cannot be reliably prevented.
[0019]
Further, in the pack container of the present invention, it is preferable that the shape of the concave portion provided in the container main body is such that the diameter is reduced toward the inner side of the container main body so that the concave portion is easily inverted to the convex portion. Therefore, in the pack container 100 of the example shown in FIGS. 1 to 5, the concave portion 12 (12 </ b> A) is formed by the molded portion 14 in which a part of the bottom wall of the container body 10 is molded into a truncated polygonal pyramid shape. In this example, the shape is formed in a truncated pyramid shape from the viewpoint that reversibility to the convex portion is particularly good, but may be a truncated pyramid shape, a pentagonal pyramid shape, a hexagonal pyramid shape, or the like. On the other hand, in another example shown in FIGS. 7A to 7C, a concave portion 12B including a molded portion 15 in which a container wall is molded in a dome shape is provided. Here, FIG. 7A is a plan view of the container body 10 ′, and FIGS. 7B and 7C are cross-sectional views taken along lines VIIb-VIIb and VIIc-VIIc in FIG. 7A. .
[0020]
7A to 7C, the concave portion 12B formed of the molded portion 15 in which the container wall is formed in a dome shape has a smooth transition from the concave portion to the convex portion (reversal from the convex portion to the concave portion). When the wall thickness of the container body is thin, there is a risk that the concave portion may be inverted to the convex portion due to the weight of the raw yuba, and the raw yuba is easily moved in the container because it is placed on the curved surface, so that the product At the time of transportation or display work, there is a risk that the raw yuba may be scattered or unbalanced, resulting in a poor appearance. On the other hand, as shown in the examples of FIGS. 1 to 5, when a concave portion 12 </ b> A including a molded portion 14 in which a container wall is formed into a truncated polygonal shape is provided, FIGS. As shown in FIG. 5, since the concave portion 12A forms a flat surface portion 17A and a tapered surface portion 17B around the flat surface portion 17A on the inner surface of the container main body 10, it is unlikely that the concave portion 12A is inverted to a convex portion by the weight of the raw yuba. Moreover, the raw yuba 30 is accommodated in a state in which the peripheral portion enters between the tapered surface portion 17B and the side wall 18 of the container body 10 and the portion other than the peripheral portion is placed on the flat surface portion 17A and is hard to move. (See FIG. 5), so that it is possible to prevent the raw yuba from being scattered or biased at the time of transporting or displaying the product, and to maintain the initial storage state, which is preferable.
[0021]
In the pack container of the present invention, it is preferable to form a flange portion 19 around the opening 10A of the container body 10 (the end of the side wall). By providing the flange portion 19, the heat sealing work of the lid member 20 is easily performed, and the sealing property is improved.
[0022]
Further, in the present invention, when enclosing the raw yuba in the pack container, air is enclosed together with the raw yuba, but instead of or together with the air, an inert gas such as nitrogen gas or argon gas may be enclosed. By enclosing an inert gas, oxidation of raw yuba can be prevented, which is preferable. In addition, although raw yuba is usually impregnated with soymilk, when the humidity is low, a small amount of soymilk may be added to the container when the raw yuba is sealed in the container.
[0023]
【Example】
Hereinafter, the present invention will be described more specifically with reference to examples.
(Example 1)
A container body having a shape shown in FIGS. 2 and 3 produced by compression-molding a polypropylene sheet having a thickness of 0.4 mm and a lid member made of a laminated film of a polypropylene film and a polyamide (nylon) film were prepared.
The container body has a container height (H1 in FIG. 3) of 14 mm, a first direction width of the opening (L1 in FIG. 2) of 180 mm, a second direction width of the opening (L2 in FIG. 2) of 90 mm, and a bottom. The width of the wall in the first direction (L3 in FIG. 3A) is 170 mm, and the width of the bottom wall in the second direction (L4 in FIG. 3B) is 80 mm. The size of the recessed portion is determined by the internal volume of the container in which the recessed portion is not provided (a container in which the entire bottom wall of the container body is made flat and the other portions are formed in the same shape and the same size). The size was reduced by 30%.
[0024]
After storing 100 g of raw yuba in the container body, heat-sealing the lid and closing the opening of the container body, the pack container enclosing the raw yuba was put in hot water of 80 ° C. and sterilized in boil. The concave portion provided on the bottom wall was inverted to the convex portion. Then, when the pack container was pulled out of the hot water and allowed to cool as it was, the convex portion gradually became smaller, and finally inverted to the original concave portion. When the pack container was carefully observed, there was no peeling of the lid material, no deformation or breakage of the container body, and the condition was good. After that, the lid material was peeled off, the raw yuba was taken out of the container and ate, and the flavor was good and satisfactory.
[0025]
【The invention's effect】
As is apparent from the above description, according to the present invention, even if the raw yuba is sealed in the pack container together with air and / or an inert gas and the entire pack container is heated, the pack container may be damaged, deformed or covered. Raw tea leaves can be heat-sterilized without peeling off (poor sealing) etc., so that raw tea leaves in a packed container that are heat-sterilized and filled with fresh tea leaves having a good flavor can be easily prepared. Can be manufactured.
[Brief description of the drawings]
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a pack container for raw water according to an example of the present invention, FIG. 1 (A) is a state diagram before an opening of the container main body is closed with a lid material, and FIG. It is a state figure which closed the opening with the lid material.
FIG. 2 is a plan view of a container main body in the pack container of FIG.
3A is a sectional view taken along line IIIa-IIIa in FIG. 2, and FIG. 3B is a sectional view taken along line IIIb-IIIb in FIG.
FIG. 4 is a view showing a state in which a concave portion provided in the container main body is turned into a convex portion by heating the pack container of FIG. 1; FIG. 4 (A) corresponds to the cross section of FIG. 3 (A); 4B is a cross-sectional view taken along a cutting line corresponding to the cross section of FIG. 3B.
FIG. 5 is a front view of a state in which raw yuba is sealed in the pack container of FIG. 1 together with air.
FIG. 6 is a front view showing a state in which the pack container in which the raw tea leaves of FIG. 5 are sealed together with air is heated, and the concave portion provided in the container body is inverted to the convex portion.
7 shows a pack container (container main body) according to another example of the present invention, FIG. 7 (A) is a plan view thereof, and FIGS. 7 (B) and 7 (C) are VIIb in FIG. 7 (A). It is sectional drawing in the -VIIb line and the VIIc-VIIc line.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Container main body 10A Opening 11 Planar wall part 12 Depression 100 Pack container

Claims (4)

A pack container enclosing raw yuba,
A container body for storing raw yuba,
A lid member for sealing the opening of the container body,
At least a part of the container body forms a planar wall portion, and the planar wall portion is a concave portion recessed toward the inside of the container body, and the opening of the container body is sealed with a lid material. A concave portion which can be inverted to a convex portion protruding to the outside of the container main body due to an increase in the container internal pressure when the container is heated is provided,
The size of the concave portion is a size that reduces the volume by 15 to 50% with respect to the internal volume of the entire container when the concave portion is not provided in the planar wall portion. Pack container for Yuba. The pack container for fresh water leaves according to claim 1, wherein the flat wall portion provided with the concave portion is a bottom wall portion of the container body. The pack container for fresh water leaves according to claim 1 or 2, wherein the concave portion is formed by a molded portion formed by molding the container wall into a truncated pyramid shape. A raw yuba is sealed in the pack container according to any one of claims 1 to 3 together with air or / and an inert gas, and the pack container in which the raw yuba is sealed is heated to pack the raw yuba simultaneously with heat sterilization. A pack characterized in that a concave portion provided in a container main body of a container is inverted into a convex portion protruding to the outside of the container main body, and then the pack container is cooled to room temperature and the convex portion is inverted into the concave portion. A method for producing raw Yuba in containers.

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