JPH06239373A - Air-permeable container with bent groove - Google Patents

Abstract

PURPOSE:To provide an air-permeable, sterile and transparent plastic container that is producible at low cost and is available for use in the fields of fermented food, perishable food, plant cultivation and cultivation of aerobic bacteria. CONSTITUTION:The container is composed of a container body 1 with a flange 2 and a covering material 4, and a groove 3 in the width of 0.05-2mm and in the depth of 0.05-2mm is formed to the flange 2. The groove 3 is bent once or more so that the inside of the container can communicate with the outside through the groove when the covering material 4 is stuck fast to the container body, and ventilation can be made through the groove 3. Since the groove 3 is bent several times, intrusion of dusts, germs or the like can be prevented.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to the field of food industry, in particular,
Foods that are difficult to seal because they generate a large amount of gas during storage, foods that respire remarkably during storage when they are suffocated, aerobic bacteria that need to have both aseptic and breathable properties It can be used in the fields of culture and plant culture.

[0002]

2. Description of the Related Art Conventionally, when a fermented food is hermetically packaged, a large amount of carbon dioxide gas is generated due to the fermentation action of the food itself,
There are problems such as expansion of the container and damage in extreme cases. The same applies to the case where the fresh food is hermetically packaged, and the breathing action of the food causes the oxygen concentration to decrease and the carbon dioxide gas to increase, which causes the food to be in a choked state, resulting in accelerated deterioration of the food quality. As a solution to these problems, it has been practiced to provide an appropriate hole in a container or a packaging bag to ensure air permeability. However, in this case, invasion of insects and contamination of microorganisms occur through the holes of the packaging material, which poses a serious problem in the preservation of the content food. In order to solve the above problems, a gas permeable sterile filter is attached to the container, but there are problems that the container manufacturing process is complicated, and the container design is limited. In the fields of aerobic culture and plant culture, test tubes, Erlenmeyer flasks,
It is common to use a petri dish, but there were problems such as damage during work and transportation, high container cost, and time-consuming cleaning. Plastic containers are sometimes used for these purposes, but they are limited to special resins because transparency and heat resistance are required. Furthermore, in the case of culturing aerobic bacteria and plants, the gas permeation of the container must be sufficiently large due to the action of respiration and photosynthesis, and as a filter with breathability while maintaining sterility, cotton plugs or special plugs can be used. Is used.

[0003]

When the fermented food is hermetically packaged, a large amount of carbon dioxide gas is generated due to the fermentation action of the food itself, and the container may expand or may be damaged in an extreme case. Further, when the fresh food is hermetically packaged, the respiratory action of the food causes the oxygen concentration to decrease and the carbon dioxide gas concentration to increase, resulting in the food being in a choked state, which results in accelerating the quality deterioration of the food. In order to solve these problems, a sterilizing filter having gas permeability is attached to the container, but there have been problems that the container manufacturing process is complicated, and the container design is limited. Therefore, there is a demand for a container that is inexpensive, breathable, and free from microbial contamination. In the field of culturing aerobic bacteria and tissue culture of plants, a test tube, an Erlenmeyer flask, a glass container such as a petri dish, and a breathable lid such as a cotton stopper or a special stopper may be used. Although common, there were problems such as damage during work and transportation, heavy container weight, and high container cost.
A plastic container may be used for these purposes, but it is limited to a specific resin because the container is required to have transparency and heat resistance. Therefore, even in this field, there is a demand for a container that is inexpensive, breathable, and free from microbial contamination. The present invention, in order to solve these problems, in the flange portion of the container formed of general-purpose plastic, by simple processing, simply by providing a thin groove, a container that is breathable and capable of preventing bacterial contamination, at low cost. The purpose is to supply.

[0004]

A container comprising a container main body having a flange and a lid member, wherein the groove is formed in the flange portion, and the groove is formed with the lid member in close contact with the flange. The inside of the container and the outside of the container are communicated with each other through refraction at least once. The groove formed on the flange was a breathable container having a width of 0.05 to 2 mm and a depth of 0.05 to 2 mm. Therefore, the present invention makes it possible to ventilate the inside and the outside of the container through the narrow groove formed in the flange portion, and further has a structure in which the groove is bent and communicates with the outside and the inside to prevent the invasion of microorganisms. Is characterized by. The shape of the container is not particularly limited, and the size of the container can be freely selected according to the amount of the content food.

The container body has a flange having a flat upper portion, and the flange portion has a width of 0.05 mm to 2 mm and a depth of 0 mm.
-It is necessary to be able to form a groove of 05 to 2 mm. The groove is connected to the outside from the inside of the container through refraction at least once in the state where the lid material is in close contact, and it is necessary for gas to pass through the groove. If the width and depth of the groove are less than 0.05, there is a high risk that the groove will be clogged during heat sealing or sealing with an adhesive-processed lid material, and if it is greater than 2 mm, microbial contamination will occur. Increases the risk of. Further, the groove passing through the inside and the outside of the container has a higher effect of preventing invasion of microorganisms as the number of times of refraction increases, but if too much, the air permeability deteriorates and it becomes unpractical. The wider the flange width is, the more advantageous it is, but the flange width as a container has a limit, and it is considered that about 10 mm is practically optimal. Therefore, from this point as well, the number of grooves is restricted, and the groove as a vent hole is limited. The number of refraction is limited. The material of the container is not particularly limited as long as it is a resin that can be molded into a container having a flange, and a general-purpose thermoplastic resin can be used. Injection molding, vacuum molding from a sheet, vacuum / pneumatic molding, etc. can be used as the molding method of the container. The container and the lid can be bonded by using a method such as heat sealing, an adhesive, or an adhesive. Heat sealing is the most common method for food packaging, but in the case of repeated opening and sealing, for example, for plant cultivation or aerobic bacterium cultivation, an adhesive is applied to the lid material. The purpose is achieved by using.

In the field of culturing plants and aerobic bacteria, since a medium is put in a container and autoclaved under high-pressure heat sterilization, molded articles of polycarbonate or polypropylene resin are usually used in terms of transparency and heat resistance. ing.
However, the container body and the lid are sterilized with ethylene oxide gas in advance, γ ray sterilization, electron beam sterilization, ultraviolet ray sterilization, etc., and separately sterilized medium is injected under a sterile atmosphere, and then sealed to prepare a culture container. This eliminates the need for heat resistance in the container, expands the range of use of the container material, and makes it possible to perform vacuum forming from sheets, vacuum / pneumatic forming, etc. Therefore, according to the present invention, it is possible to inexpensively provide a container having air permeability and capable of preventing contamination of microorganisms.

[0007]

According to the present invention, the groove of the flange portion is communicated with the outside and the inside of the container, and it is possible to provide the container with high gas permeability, and further, the groove is thin and has undergone at least one refraction. It is also possible to prevent the invasion of microorganisms from the outside.

[0008]

EXAMPLES Next, the present invention will be described in detail based on examples. The first embodiment shows the case of using it for a chilled miso container. As a container body, an unstretched polyester sheet having a thickness of 0.7 mm is used, and as shown in FIG.
A square container having a square shape of mm mm, a size of the bottom portion of 95 mm square, and a depth of 95 mm was formed. Each corner has a radius of R, and container 1
The flange portion 2 was flattened to have a width of 8 mm, and a groove 3 having a width of 1 mm and a depth of 1 mm was formed on the flange in the shape shown in FIG. A 25 μm polyester film having heat sealing properties was used for the lid member 4. 1 kg of miso which was not sterilized by heating was filled in the above-mentioned container, and the lid member was heat-sealed and hermetically sealed. In the same way, add one raw miso filling container.
As a result of producing 0 pieces and conducting a storage test at 5 ° C. for 2 weeks, it was found that expansion of the container due to fermentation was not observed, the contents were not substantially altered, and the container could be used as a raw miso container.

The second embodiment shows a case of using it in a plant incubator. Using a 1.2 mm-thick unstretched polycarbonate sheet as the base material of the container, a rectangular container with an inner dimension of the opening of 75 mm square, a bottom dimension of 65 mm square, and a depth of 55 mm is formed by vacuum / pneumatic molding. did. The corner portions each have a radius R, the flange portion of the container is flattened to have a width of 10 mm, and a groove having a width of 0.5 mm and a depth of 0.5 mm is formed on the flange in the shape shown in FIG.
The lid has the structure shown in FIG. 4, and the acrylic adhesive 12 is applied to the polypropylene film 50 μm of the base material 30 μm, and the polypropylene film 20 μ is applied to the adhesive.
A release paper 13 having a silicone finish was bonded to m. 50 ml of a plant culture medium prepared by a conventional method was poured into the above container, the release paper of the lid was peeled off, and the flange was adhered and sealed. 20 sealed containers were heat-sterilized in an autoclave according to a conventional method. 10 containers containing the above sterilized medium under normal environment, 23 ℃, 1
After left for a month, it was found that there was no single microbial contamination of the medium and it could be used as a culture vessel. Also,
With respect to the 10 sterilization containers described above, part of the lid of the container was peeled off under a sterile atmosphere, carnation seedlings cultured by a conventional method were transplanted, and immediately sealed to obtain a culture container. As a result of culturing 10 culture vessels at 23 ° C. under an illuminance of 3000 lux for 16 hours and in a dark place for 8 hours for one month, there was no microbial contamination, and the growth of plants was also good. No significant difference was observed with the conventional culture method.

The third embodiment shows a case where a container and a lid material are sterilized with ethylene oxide gas and used in a plant culture container. Using a 1.2 mm thick unstretched polystyrene sheet as the base material of the container, in the same manner as in the second example,
A rectangular container of the same size was molded, and the groove on the flange was also the same. The same lid material was used as in the second embodiment. The container and the lid were sterilized by ethylene oxide gas according to a conventional method. Bring the sterilization container and lid in an aseptic atmosphere, prepare by a conventional method, and sterilize by heating in an autoclave.
Then, the release paper of the lid material was peeled off, adhered to the container and sealed. Ten plant culture vessels prepared as described above were left for one month at 23 ° C. in a normal environment. It was found that the culture medium was not contaminated with microorganisms and could be used as a culture vessel. . Further, with respect to the 10 containers containing the sterilizing medium, in a sterile atmosphere, part of the container lid is peeled off,
A carnation seedling cultivated by a conventional method was transplanted and immediately sealed to obtain a culture container. As a result of culturing 10 culture vessels at 23 ° C. under an illuminance of 3000 lux for 16 hours and a cycle of 8 hours in the dark for 1 month, there was no contamination by bacteria and the growth of plants was also good. No significant difference was observed with the conventional culture method.

The fourth embodiment shows a case where the container is used for a radish radish container. 1.0m thick as the base material of the container
A rectangular container having an opening inner dimension of 82 mm square, a bottom dimension of 65 mm square and a depth of 150 mm was molded by a vacuum / pneumatic molding method using m unstretched polystyrene sheet.
The corners each have a radius of R, the flange of the container is flattened to have a width of 6 mm, and a groove having a width of 2 mm and a depth of 2 mm is formed on the flange in the shape shown in FIG. The lid material is polypropylene film 50 μm and 3 hot lacquers.
It was prepared by applying 0 μm. 10 radish sprouts in the above container
0 g was filled, and the lid material was heat-sealed and hermetically sealed. As a result of preparing 10 of the above-mentioned kaiware radish filling containers and storing them at 10 ° C. for 3 days, no unusual odor or pain such as troche due to a decrease in oxygen concentration was observed, and a sufficient amount of gas permeation was ensured as a container for raw vegetables. I knew it was.

[0012]

EFFECTS OF THE INVENTION The present invention makes it possible to inexpensively manufacture a breathable aseptic container by a simple means of processing a narrow groove in a flange portion without using a sterile filter or the like. In addition to plant culture vessels, culture vessels for aerobic bacteria, etc., it has become possible to provide a wide range of applications as vessels for fresh foods, processed foods, etc. that require air permeability.
Further, since the ventilation amount of the container can be changed by changing the width and length of the groove, it has become possible to cope with various plants as a plant culture container.

[Brief description of drawings]

FIG. 1 is a perspective view of a breathable container having a bent groove according to the present invention.

FIG. 2 is a plan view of a groove formed in a flange portion according to the first embodiment.

FIG. 3 is a plan view of a groove formed in a flange portion according to a second embodiment.

FIG. 4 is a sectional view showing a structure of a lid member according to a second embodiment.

FIG. 5 is a plan view of a groove formed in a flange portion according to a fourth embodiment.

[Explanation of symbols]

 1 Molded Container 2 Flange of Container 3 Breathable Groove 4 Lid Material 11 Base Film of Lid 12 Adhesive Layer 13 Release Paper

Claims (2)

[Claims] 1. A container composed of a container body having a flange and a lid member, wherein the groove is formed in the flange portion, and the groove is at least once or more in a state where the lid member is in close contact with the flange. A breathable container characterized in that the inside of the container and the outside of the container communicate with each other through refraction. 2. The groove formed in the flange has a width of 0.05 to 2
mm, and the depth is 0.05-2 mm, The breathable container of Claim 1 characterized by the above-mentioned.