JPH0528183Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a packaging container for distribution and storage of cooked and semi-cooked foods, such as takoyaki and boiled scallops, which have a curved surface.

[Prior Art] Plastic containers are often used as packaging containers for distribution and storage of cooked and semi-cooked foods.
Compared to cans and bottles, plastic containers have the advantage of being cheaper, lighter, easier to handle, and less likely to break. In recent years, there has been an increase in demand for cooked and semi-cooked foods packaged in heat-resistant containers that can be heated in microwave ovens, and the types of packaged foods have become more diverse. are usually packaged in box- or tray-shaped containers with one storage recess.

[Problem that the invention aims to solve] Recently, there are many dishes such as takoyaki and boiled scallops.
Products with convex curved surfaces packaged in heat-resistant containers are also being considered. However, when retort sterilization is performed by filling and sealing these foods into conventional box-shaped containers, the vibrations during movement in each of the above steps can cause loads to be applied to the convex curved surfaces of adjacent foods. However, in this case, the stress is concentrated on a point or line, so the structure of the food is likely to collapse or deform, which is an obstacle to commercialization.

For example, when boiling scallops in water, the vibrations cause the scallops to crumble and the liquid to be poured becomes cloudy, significantly reducing the product value.

In addition, in the case of takoyaki, the originally spherical shape collapses into a dice-like shape, even if it does not collapse.

Furthermore, since the container is spherical in shape, there are many voids inside the container, resulting in poor heat transfer, which increases the sterilization time and may result in significant quality deterioration during the retort, resulting in a loss of commercial value.

Furthermore, since there are many voids, the container is easily deformed during the retort, and it is necessary to strictly control the pressure.

This idea was made in consideration of the above-mentioned circumstances, and is aimed at the distribution and distribution of packaged foods that have spherical, cylindrical or similar convex curved surfaces on their surfaces.
A plastic packaging container suitable for storage,
To provide a molded container for retort food which is inexpensive and easy to handle, can prevent the collapse of food structure and deformation of food due to vibration during the food filling, sealing and sterilization processes, has good heat transfer during heat sterilization, can use general sterilization equipment for retort food even for a large container, does not require special pressure control, and can prevent deterioration of food quality and deformation of the container.

[Means for Solving the Problems] In response to this purpose, the retort food molded container of the present invention includes a laminated plastic sheet including a material layer with low oxygen permeability in the inner layer and a heat-resistant material layer in the surface layer. A molded container formed by molding a material, comprising a plurality of storage recesses recessed into a hemispherical shape on one side of a sheet material, and a plurality of storage recesses connected to the upper edge of each of the plurality of storage recesses. Another molded container for retort food according to this invention, characterized by comprising a flange portion projecting to the outside of the storage recess group, and a sealing protrusion surrounding the storage recess group and provided on the upper surface of the flange portion. is a molded container made of a laminated plastic sheet material that includes a material layer with low oxygen permeability on the inner layer and a heat-resistant material layer on the surface layer, and has a plurality of cylindrical recesses on one side of the sheet material. A storage recess, a flange part that connects to the upper edge of each of the plurality of storage recesses and extends to the outside of the storage recess group consisting of the plurality of storage recesses, and a flange part that surrounds the storage recess group and is provided on the upper surface of the flange part. The invention is characterized by comprising a sealing protrusion.

[Function] The molded container for retort food configured as described above can be manufactured at low cost by vacuum forming or the like.

In the molded container for retort food according to claim 1, one takoyaki or meatball,
Other spherical or hemispherical crumbly foods can be filled, and the walls of the storage recess are positioned along and surrounding the surface of the spherical or hemispherical food to prevent vibrations. Even if the food is exposed to stress, stress will not be concentrated on one part of the food surface, preventing the food from crumbling or deforming.

In the retort food molded container of claim 2, each storage recess can be filled with a cylindrical easily crumbling food such as boiled scallops or shumai. Since the food product can be surrounded by walls of the storage recess located along the food product, stress will not be concentrated on a portion of the food product surface even when subjected to vibrations, thereby preventing the food product from collapsing or deforming.

In addition, the molded containers for retort food according to claims 1 and 2 are both shaped like a combination of independent containers, so even if they are large containers, heat transfer is good during heat sterilization, and the food quality is high. It holds well and does not require special pressure control because there are few voids.

If the entire height of the food cannot be accommodated in the storage recess after filling, a cover having a plurality of storage recesses shaped to correspond to the portion that cannot be accommodated can be used to seal the food by heat sealing or the like.
It can withstand subsequent heat sterilization, and does not crush the food inside even when the inside of the retort food molded container becomes negative pressure after cooling. In addition, it has high quality preservation properties due to its oxygen barrier properties.

Further, in the retort food molded container of this invention, if the depth of the storage recess is selected to be sufficient to enclose the entire height of the food, it can be sealed with the seal lid 9.

[Example] Hereinafter, details of this invention will be explained with reference to drawings showing an example.

In FIGS. 1 and 2, 1 is a molded container for retort food suitable for foods having a cylindrical surface, such as boiled scallops and shumai.

The molded container 1 for retort food uses a material layer with low oxygen permeability, such as EVAL, for the intermediate layer.
It is manufactured by a molding method such as a vacuum forming method using a laminated plastic sheet material with heat-resistant material layers such as high-density polypropylene as the inner and outer layers.

The molded container 1 for retort food includes a plurality of storage recesses 4 that are hemispherically recessed on one side of the sheet material. That is, each storage recess 4 has at least a portion of the open upper end 10 in the circumferential direction on the plane 3 formed by the surplus portion 2 which is a portion of the sheet material that does not undergo deformation, and has the same depth d from the plane 3. It has an inner surface shape and depth that can surround the bottom surface 5a and side surfaces 5b along the entire height of the cylindrical surface of the boiled scallop, which is the stored food 5. That is, it has a circular flat bottom 9 and a substantially cylindrical side surface slightly tapered downward for mold release, and the depth d is greater than the height H of the food to be accommodated 5.

Adjacent storage recesses 4 communicate with each other through a gutter-like upper-opened circulation groove 6, so that when filling with liquid, it is only necessary to inject liquid into one storage recess 4. ing.

The surplus portion 2 forming the plane 3 is provided around the outer circumference of the 4 groups of storage recesses with a predetermined width, forming a flange portion 7, and a sealing protrusion 8 protrudes upward from the upper surface of the flange portion 7. It is formed by

Further, a stacking step 11 for stacking and handling a large number of molded containers 1 for retort food is provided at a portion facing the flange 7 on the upper side wall of the storage recess 4.

FIGS. 3 and 4 show a molded container 1a for retort food, which is another embodiment of the present invention and is suitable for takoyaki.

Storage recess 4a of molded container 1a for retort food
has a substantially hemispherical shape, and at least half 15a of the spherical surface of the takoyaki that is the stored food 15
It has an inner surface shape and depth that can surround it along. After filling each storage recess 4a with one takoyaki,
If a heat-resistant lid body 12 having a plurality of recesses 13 having a shape corresponding to the portion 15b of the takoyaki that cannot be accommodated in the storage recess 4a is attached by thermal adhesion or the like on the sealing ridge 8a, retort food can be prepared. The molded container 1a is sealed and the takoyaki can be heat sterilized and stored.

The lid 12 has a plurality of recesses 13, but instead of the lid 12, it may be sealed with a lid (not shown) that has strength and wall thickness to withstand negative pressure and has one storage recess. good.

[Effects of the invention] As is clear from the above explanation, this invention is a plastic packaging container that is suitable for the distribution and storage of packaged foods that have a spherical, cylindrical, or similar convex curved surface on the surface. As a result, it is possible to obtain a molded container for retort food that is inexpensive, easy to handle, and can prevent the collapse of the structure of the food and the deformation of the food due to vibrations during the filling, sealing, and sterilization processes of the food.

In addition, in the molded container for retort food of this invention,
Since the container wall is located along the surface of the food and has an uneven shape surrounding it, there are many surfaces for heat transfer to the food, and the heating and cooling efficiency is extremely high, allowing heating and cooling in a short time. Flavor due to heat sterilization
It has the effect of reducing undesirable changes in color, texture, etc. and improving quality. Also, because there are few voids, special pressure control is not required during heat sterilization, and it can be used for heat sterilization of general retort food at a constant pressure. Can be sterilized with equipment.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing a molded container for retort food according to an embodiment of this invention, Fig. 2 is a front view of a half vertical section of the molded container for retort food shown in Fig. 1, and Fig. 3 is a plan view of the molded container for retort food according to an embodiment of the invention. FIG. 4 is a front view showing a molded container for retort food according to another embodiment, and FIG. 4 is a perspective view showing a state in which the molded container for retort food shown in FIG. 3 is used. DESCRIPTION OF SYMBOLS 1... Molded container for retort food, 2... Excess portion, 4, 4a... Storage recess, 5, 15... Food to be stored, 6... Distribution groove.

Claims (1)

[Claims for Utility Model Registration] (1) A molded container obtained by molding a laminated plastic sheet material including a layer of material with low oxygen permeability in the inner layer and a layer of heat-resistant material in the surface layer, a plurality of storage recesses that are hemispherically recessed toward one side; and a flange portion that connects to each upper edge of the plurality of storage recesses and projects outside the storage recess group consisting of the plurality of storage recesses; A molded container for retort food, comprising: a sealing ridge provided on the upper surface of the flange portion surrounding the group of storage recesses. (2) A molded container made of a laminated plastic sheet material including a layer of material with low oxygen permeability in the inner layer and a layer of heat-resistant material in the surface layer, the container having a cylindrical depression on one side of the sheet material. a plurality of storage recesses; a flange portion that connects to the upper edge of each of the plurality of storage recesses and extends to the outside of the storage recess group consisting of the plurality of storage recesses; and a flange portion surrounding the storage recess group; A molded container for retort food, comprising: a sealing protrusion provided on the upper surface of the flange portion.