JPH08230950A - Synthetic resin food container - Google Patents

Abstract

PURPOSE: To provide a synthetic resin food container that can preserve food under satisfactory conditions for keeping freshness, prevending dew condensation from being produced from drips exuding from the food and changing of temperature, and enables a user to see through food inside the container satisfactorily. CONSTITUTION: A food container is constructed of a container main body 1 and a transparent or translucent cover body 5 that are separable from each other. A water absorber 3 is provided at the inside on the bottom of the container main body, and antifogging agent is contained in the cover body, or antifogging treatment is applied to the cover body while a lens 7 available for seeing food 4 in the container through is provided integrally at the cover body. A gap 6 for gathering liquid is formed on the inside of a part where the container main body 1 and the cover body 5 are fitted together.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin food container, and more specifically, it can be divided into a container body and a transparent or translucent lid, and contains a fresh water-rich food inside. The present invention relates to a synthetic resin food container suitable for

[0002]

2. Description of the Related Art At present, a large amount of fresh food with a large amount of water such as raw sea urchin, salmon roe, sardine, and cod is packaged in a container for distribution. For example, as a container for raw sea urchin, a combination of a wooden container body and a transparent synthetic resin lid is generally used. The wooden container body absorbs more appropriate amount of water than raw sea urchin, and it is suitable as a container for foods of this type to prevent stuffiness due to the water absorption and hygroscopicity peculiar to trees and the air permeability from the gaps between trees. Has been done.

However, the wooden container body has environmental problems associated with resource depletion, labor and cost increase due to container assembly processing, it is difficult to obtain a uniform product because it is a natural product, and bacteria adhere and propagate. Since it is easy to use, it is considered to use a synthetic resin container.

However, since a synthetic resin container has neither water absorption nor hygroscopicity, when used as a container for fresh food,
Due to "drip" exuding from food and "condensation" caused by temperature change, the surface of the food excessively contains water and the freshness of the food rapidly deteriorates. There is a problem that it cannot be seen well and the product value is significantly reduced.

[0005]

For this reason, JP-A-60
Japanese Patent Laid-Open No.-134877 and Japanese Patent Laid-Open No. 61-60474 disclose that a water absorbent is installed on the inner bottom surface of a container body made of synthetic resin so as to absorb drip liquid from food.

However, the main purpose of these containers is to absorb the drip liquid, and the condensation caused by the steam generated in the upper space cannot be solved. That is, this water vapor condenses on the inner surface of the transparent lid, drops not only on the food as water droplets to reduce the freshness of the food, but also impairs the transparency of the lid, from the outside of the food inside. This will make it difficult to see through, and will significantly impair the appearance.

The present invention has been made in view of the above problems, and an object thereof is to effectively remove drip exuding from food and dew condensation caused by temperature change, and to improve storage stability of food with good freshness. Another object of the present invention is to provide a food container made of a synthetic resin, which is capable of enhancing the food and allowing the food inside to be seen through well.

[0008]

To achieve the above object, in the present invention, a container body and a transparent or semi-transparent lid can be divided, and a water absorbing material is provided on the inner bottom surface of the container body. In such a synthetic resin food container, the lid body is made to contain an antifogging agent or is subjected to an antifogging treatment, and the lid body is integrally formed with a lens portion capable of magnifying and seeing through the foodstuff therein.

It is preferable that the container body and the lid body are vertically fittable, and a liquid reservoir cavity is formed inside the fitting portion.

[0010]

As described above, according to the present invention, when fresh food containing a large amount of water is contained in the container body, the drip liquid exuded from the food is absorbed by the water absorbing material disposed on the inner bottom surface of the container body, and When the vaporized water vapor condenses on the inner surface of the lid body, it flows down along the inner surface of the lid body and is absorbed by the water absorbing material, the transparency of the lid body is not impaired by the dew condensation, and the food inside is integrated with the lid body. It is always magnified and seen through the formed lens part.

When the container main body and the lid body are vertically fittable and a liquid storage space is formed inside the fitting portion, the inner surface of the lid body is formed as described above. Moisture flowing down along the gap can be captured by the void, and the water accumulated in the void can enhance the airtightness of the fitting portion between the container body and the lid.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. In the drawings, reference numeral 1 indicates a synthetic resin container body having an open upper end, and an outer peripheral bottom portion of which is an annular leg. The piece 2 is provided so as to project downward. In addition, a sheet-shaped water absorbing body 3 is arranged on the inner bottom surface of the container body 1, and a food 4 containing moisture such as fresh food is contained above the water absorbing body 3.

The material of the container body is preferably a thermoplastic synthetic resin capable of injection molding or sheet processing / vacuum molding, and the transparent resin is vinyl chloride, polystyrene, polyacrylonitrile, methyl methacrylate,
High-density polyethylene, polypropylene, and polyethylene terephthalate are used as translucent resins such as polycarbonate, and high-impact polystyrene, acrylic nitrilo-butadiene-styrene copolymer (ABS resin), etc. are used as opaque resins.

The water absorbent body 3 is preferably a water permeable membrane, an absorbent material and a water retaining material which are sequentially laminated from the upper side to the lower side. As the water permeable membrane, a semipermeable membrane, a water repellent non-woven fabric and a perforated polyethylene film. As the absorbent material, polymer absorbent material, powdery granular material with osmotic pressure such as edible sugar,
As the water-retaining material, materials having a capillary action such as paper, pulp, non-woven fabric and foam are preferable.

The water absorbent body 3 not only absorbs the exudate from the food 4 installed on the upper surface thereof, but also absorbs the condensed water flowing down along the inner wall surface of the container body 1 at its peripheral end portion. You can do it.

A lid 5 is detachably fitted into the upper end opening of the container body 1. More specifically, as shown in an enlarged view of the fitting portion in the drawing, the upper end opening of the container body 1 is formed in a three-step step shape that extends upward on the inner peripheral side, and the one lid body The lower end opening of 5 is formed in a two-step step shape with the outer peripheral side extending downward, and the outer peripheral side extending end 5a of the lid is placed and fitted on the outermost peripheral lowermost step 1a of the container body. There is. Then, the upper surface 1b of the uppermost step on the inner circumference side of the container body 1 is separated from the lower surface 5b of the inner step on the inner circumference side of the lid body 5, and the liquid storage cavity portion 6 described later is described.
Is formed.

The lid 5 is formed by injection molding or press molding of a transparent or translucent synthetic resin, and the types of these resins may be the same as those used for the container body described above.

An antifogging material is provided on the inner surface of the lid 5. Glycerin fatty acid ester, sucrose fatty acid ester, which can be used for food as an anti-fog material (food additive),
Surfactants such as sorbitan fatty esters are preferred. As the processing method, there are a method of mixing an antifogging material with a resin in advance and molding, and a method of adhering it to the inner surface of the molded lid. The latter can be easily applied by spraying an antifogging material on the inner surface of the lid, or by leaving the lid in a box pre-filled with the antifogging material.

Further, a large number of fine grooves (not shown) are provided on the inner surface of the lid body 5 along the longitudinal direction so that the water condensed on the inner surface of the lid body flows down along the fine grooves. preferable. These narrow grooves, together with the effect of lowering the surface tension of the antifogging material, guide the condensed water to the water absorbing material 3 on the lower surface of the container body. Therefore, it is preferable to form the narrow groove on the inner surface of the container body along the vertical direction.

Further, a lens portion 7 for enlarging and seeing through the food 4 inside is integrally formed on the upper surface of the lid 5. The lens portion 7 is formed integrally with the lid when the lid is injection-molded from transparent synthetic resin. The lens portion 7 is preferably composed of a convex lens or a Fresnel lens, and it is desirable that the lens portion has a diameter of 10 to 30 mm and a focal length equal to or smaller than this diameter so that the focal length of the lens portion matches the upper surface of the food inside. Design the lens.

In order to improve the storability of the fresh food contained in the container body 1 and the lid 5, it is preferable to contain an antibacterial agent in the synthetic resin for molding the container body and the lid. As the antibacterial agent, hinokitiol-containing material clathrated in cyclodextrin, metallic silver ceramic antibacterial agent as silver apatite, and the like are suitable, and these are commercially available as a masterbatch kneaded with a synthetic resin, and synthesized to a desired concentration. It may be mixed with a resin raw material and molded. In addition, as a preferable content of the antibacterial agent, hinokitiol-containing material 10 to 100 mg / m ² , silver apatite 0.
It is 2 to 2.0 wt%.

In consideration of environmental problems after the container is used, biodegradable aliphatic polyester (trademark "Bionole" manufactured by Showa High Polymer Co., Ltd.) may be used as a raw material.

In the production of the container of the present invention, especially the lid, a multilayer sheet extrusion method can be adopted in addition to the injection molding method. In this method, a resin in which an antibacterial agent (containing hinokitiol) and an antifogging material (fatty acid ester) are appropriately mixed is extruded with a thickness of several microns, laminated with a substrate, and the surface thereof is subjected to corona discharge treatment,
Since the antibacterial action and the antifogging action can be maintained semi-permanently only on the inner surface portion, it is a superior production method with high productivity and low drug cost. The resin sheet manufactured by the multi-layer sheet extrusion method can be accurately processed into a desired shape by press working.

When fresh foods 4 such as fresh sea urchins and salmon roe are contained in the above containers, drip liquid exuding from the insides of these foods is absorbed by the water absorbing material 3 disposed on the inner bottom surface of the container body 1, Prevents deterioration of food freshness due to drip liquid. Further, the water vapor generated from the food is condensed on the inner surface of the transparent lid body 5. However, since the lid body contains an antifogging material or is subjected to an antifogging treatment, the condensed water is immediately condensed on the inner surface of the lid body. And flows down to reach the fitting portion between the container body 1 and the lid body 5. As shown in the figure, the fitting portion is formed with the liquid storage cavity 6 that opens to the inner surface side of the lid body, so that the condensed water flowing down along the inner wall surface of the lid body is collected here. It also prevents the downward flow and also serves as a sealing material that hermetically seals the fitting portion between the lid body and the container body. The condensed water overflowing from the liquid storage cavity 6 flows down along the inner wall surface of the container body and is absorbed into the interior thereof from the peripheral portion of the water absorbing material 3 arranged on the lower surface of the container body.

As described above, the lid is not clouded by the water evaporated from the food, and the food inside can be always magnified by the magnifying and see-through lens portion 7 formed integrally with the lid.

[0026]

As described above, according to the present invention, a synthetic resin food container can be divided into a container body and a transparent or translucent lid, and a water absorbing material is disposed on the inner bottom surface of the container body. In the above, since the lid body contains an antifogging agent or is subjected to an antifogging treatment and the lid body is integrally formed with a lens portion capable of magnifying and seeing through the food inside, a fresh food with a high water content in the container body In the case of containing, the drip liquid exuded from the food is absorbed by the water absorbing material disposed on the inner bottom surface of the container body, without deteriorating the freshness of the food, and the water vapor evaporated from the food is condensed on the inner surface of the lid. Absorbed by the water-absorbing material flowing down along the inner surface of the lid body, the transparency of the lid body is not impaired by dew condensation, and the food inside is always magnified and seen through a lens portion formed integrally with the lid body,
It can be a container that enhances the commercial value of the food inside.

Further, when the container body and the lid body are vertically fittable and a liquid storage space is formed inside the fitting portion, the inner surface of the lid body is formed as described above. Moisture flowing down along the gap can be captured by the void, and the water accumulated in the void can enhance the airtightness of the fitting portion between the container body and the lid.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a synthetic resin food container according to a preferred embodiment of the present invention with food stored inside.

[Explanation of symbols]

 1 Container Main Body 3 Water Absorbing Material 4 Food 5 Lid 6 Void for Liquid Storage 7 Lens

Claims (2)

[Claims] 1. A synthetic resin food container which can be divided into a container body and a transparent or semi-transparent lid, and in which a water absorbing material is disposed on the inner bottom surface of the container body. A synthetic resin food container, characterized in that it contains a clouding agent or is subjected to an anti-fog treatment and is integrally formed with a lens portion capable of magnifying and seeing through the food inside. 2. The composition according to claim 1, wherein the container body and the lid body are vertically fittable, and a liquid storage space is formed inside the fitting portion. Resin food container.