JPH01124580A - Freshness keeping heat insulating corrugated cardboard box - Google Patents

Abstract

PURPOSE:To easily pack perishable foods, to keep the same within a necessary temp. range for a long time and to recycle the title box, by interposing auxiliary corrugated cardboards with respect to the inside bottom part and side parts of a corrugated cardboard box to thickly arranging air layers and providing gas adsorbing capacity to be auxiliary corrugated cardboards. CONSTITUTION:A freshness keeping heat insulating corrugated cardboard box D is constituted of a corrugated cardboard box 1 and two auxiliary corrugated cardboards 2, 2' and the inside liner of the auxiliary corrugated cardboard 2 or 2' has gas adsorbing capacity and side interposing panels 2b are connected to two sides of the bottom interposing panels 2a of the auxiliary corrugated cardboards 2, 2' and inclined guide surfaces 3c outwardly opened by the side interposing panels 2b are formed. The auxiliary corrugated cardboard 2 is inserted inside the corrugated cardboard box 1 and the auxiliary corrugated cardboard 2' is inserted inside said cardboard 2 so that both cardboards 2, 2' cross each other at a right angle at the parts of the bottom interposing panels 2a. At the bottom panel part, an air layer is formed by the bottom flaps of the corrugated cardboard box 1 and the bottom interposing panels 2a of the auxiliary corrugated cardboards 2, 2' and, at the side panel parts, air layers are formed by the side panels of the corrugated cardboard box 1 and the side interposing panels 2b of the auxiliary corrugated cardboards 2, 2' to form a heat insulating structure.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applied to insulated cardboard boxes for preserving fresh vegetables, fruits, refrigerated foods, etc., for effectively maintaining their freshness during transportation and delivery.

Conventional technology The required maintenance temperature varies depending on the fresh food, but there is a certain range of required maintenance temperature, and an insulated container stores items that have been cooled to a certain lower limit temperature and maintains a certain required cooling temperature. It is used to keep fresh vegetables within a certain range, or conversely, in cold regions, to prevent fresh vegetables, etc.

In order to improve the heat retention effect, a cold storage agent that absorbs heat internally may be used when used as a cold storage container, or a heating agent may be used when used as a heating container.

Conventionally, a Styrofoam container has generally been used as a simple and effective heat-insulating container.

As a freshness preservative, bags containing oxygen absorbers and other gas adsorbents are used.

Problems to be Solved by the Invention Conventional Styrofoam containers consist of a container body and a lid that are foam-molded using a predetermined mold. Required a mold.

Furthermore, since the Styrofoam container cannot be folded when empty, it is inconvenient for transportation and inventory.

Furthermore, styrofoam containers are increasingly being used as one-way boxes for fresh foods, etc., but these styrofoam containers are becoming a burden to dispose of, and are becoming a serious disposal pollution problem.

On the other hand, cardboard boxes can be easily disposed of by incineration, and most of them are recycled, making them a typical resource-saving packaging container.

However, ordinary cardboard boxes are not thought to be effective insulating containers, so in recent years, cardboard boxes have been combined with foamed resin sheets, or cardboard is laminated with aluminum vapor-deposited film to be used as cold containers. However, the heat effect is small and the boxes are expensive and cannot be recycled.

In this way, up until now, 1. An effective insulating container using only cardboard as an insulating material has not been obtained. That is-
This is because heavy cardboard boxes do not have much of an insulating effect.

In addition, after the life functions of seafood and meat are lost, chemical and
Physical changes and microbial growth.

Due to the action of enzymes, food quickly deteriorates and spoils, resulting in a deterioration in its quality as a food.

Even after harvest, vegetables and fruits continue to function as individuals, undergoing physiological changes, and chemical and physical effects such as lipid oxidation.

Starch ages and decomposes, proteins etc. are broken down microbially and enzymatically, and browning occurs as the starch decomposes.

With the exception of some fresh foods, they have a high moisture content, so microorganisms rapidly multiply and spoil them at room temperature.

In order to preserve freshness during storage and transportation of fresh foods, the environment should be kept at a low temperature that is inconvenient for the growth and proliferation of microorganisms.

For this reason, it is better to use a low-temperature distribution system in which fresh foods are pre-cooled as quickly as possible, stored at low temperatures, and transported under cold conditions.

Fruits and vegetables continue to undergo catabolic processes to maintain life even during storage, so they release carbon dioxide and other gases through respiration.
It is oxidized and consumed by discharging moisture, etc., and its quality deteriorates. This effect can be suppressed by lowering the temperature, or by increasing the amount of inert gases such as carbon dioxide or nitrogen gas and decreasing the amount of oxygen, causing the animal to go into a dormant state.

In general, it is best to harvest fruits and vegetables just before they are overripe, but in particular, fruits ripen due to their biological functions, and when they reach full ripeness, their respiration rapidly increases, and as they mature, ethylene is produced. However, it acts as an autocatalyst and generates a large amount of gas, which affects respiration and fruit color.

Therefore, when transporting fresh foods from production areas to consumption areas, or delivering refrigerated and frozen foods from door to door,
Not only can the product be kept cold or warm within a temperature range suitable for the product, but it also has a freshness effect by adsorbing ethylene, oxygen, etc., can reduce costs, and can avoid transporting the product. Nowadays, there is a growing need for insulated, fresh containers that can be folded flat and disposed of without causing pollution.

In the first place, an insulated container is sealed with a wall made of a material with low thermal conductivity.

Air has the lowest thermal conductivity of any naturally occurring substance and is an effective insulator in the absence of movement and convection. Styrofoam boxes have an insulating effect because of the isolated air.

Corrugated cardboard is made up of front and back liners, a core flute, and air separated by the core flute, so if you make a corrugated box with a structure that seals the edges in the width direction of the cardboard, it will Although the box itself has an insulating structure, the insulating effect of a heavy cardboard box is still not sufficient.

Therefore, the advantage of the present invention is that it can be folded when empty, making it easy to pack fresh food, and has a great insulation effect that allows it to maintain the required temperature range for as long as possible, and has a freshness preservation effect. There is no waste pollution,
The purpose of the present invention is to provide a recyclable, resource-saving, inexpensive, heat-preserving, heat-insulating cardboard base.

Means for Solving the Problems In order to achieve the above object, the present invention comprises a corrugated board base and an auxiliary corrugated board, and the auxiliary corrugated board is interposed inside at least the bottom and sides of the corrugated board base to form a box. It can be installed so that the air layer in the bottom plate part and the side plate part can be thickened, and the auxiliary cardboard has gas adsorption ability.

action The effects of the above technical means are as follows.

When the box is empty, it can be folded. In addition, by interposing auxiliary cardboard inside the cardboard base, the air layer at the bottom and sides is thickened, the heat resistance inside and outside the box is increased, the insulation effect is increased, and it has gas adsorption ability. The use of auxiliary cardboard allows the freshness of perishable foods to be maintained, and since the material is made of cardboard, it does not cause waste pollution, can be recycled, and is a resource-saving, inexpensive, insulated container. Become.

Embodiments Hereinafter, embodiments of the present invention will be specifically described based on the drawings.

Fig. 1 is a partially cutaway schematic perspective view of the fresh heat-insulating corrugated board according to the first embodiment of the present invention in a packed state, and Fig. 2 is a perspective view of the auxiliary corrugated board (in the drawing, the corrugated board The liner and core flute are shown as a single line without any thickness).

The freshness-insulating cardboard base of this example consists of an AI type top oven type (general type in which lid flaps are provided on each of the four upper and lower sides of the side plate) cardboard base 1, and two auxiliary cardboard bases 2. and 2'.

The inner liner of the auxiliary corrugated cardboard 2 or 2' is made to have gas adsorption ability by adding or coating porous ore powder or activated carbon or other deoxidizing material that has the ability to adsorb ethylene gas, etc. There is.

In the auxiliary corrugated cardboard 2, 2', a side intervening plate 2b is connected to two sides of a bottom intervening plate 2a via a bent ruled line.

The measuring section intervening plates 2b are dimensioned so that guide surfaces 3C that are inclined to open outward are formed on each of the measuring section intervening plates 2b.

To assemble the heat-preserving and heat-insulating corrugated cardboard base of this embodiment, first, the bottom flap of the corrugated cardboard base 1 is secured with duct tape or the like.

Next, one auxiliary corrugated cardboard 2 is inserted inside the corrugated cardboard base 1, and another auxiliary corrugated cardboard 2' is inserted inside the corrugated cardboard base 1 so as to intersect at right angles at the bottom intervening plate 2a.

Therefore, the bottom intervening plates 2a of the auxiliary corrugated cardboards 2, 2' are installed at the inner bottom of the corrugated board base 1, and the side intervening plates 2b are interposed inside the four side plates by the elastic force of the corrugated cardboard.

Next, the contents are put in and the flap, which is the top plate of the cardboard base 1, is closed.

As a result, in the bottom plate part, an air layer is formed by the double bottom flaps of the corrugated board base l and the bottom intervening plates 2a of the two auxiliary corrugated boards 2 and 2', resulting in a heat insulating structure.

The side plate portion has a heat insulating structure due to the air layer between the side plate of the corrugated board base 1 and the side intervening plates 2b of the auxiliary corrugated boards 2 and 2'.

Furthermore, since the inner liner of the auxiliary cardboard boxes 2, 2' has a gas adsorption ability, there is an effect of preserving the freshness of fresh foods.

Generally, the lower part of the container has a larger temperature distribution with the outside air, so the heat flow is larger, but by installing an auxiliary cardboard intervening board on the top part as well, the insulation structure of the top part will be strengthened.

In addition, the corrugated cardboard base 1 does not necessarily have to be of the AI type, and a substantially similar heat-preserving and heat-insulating structure can be obtained even on an automatically assembled surface.

Additionally, cardboard may be used as a water-repellent or water-resistant liner and bonded with water-resistant glue.

There are various substances that have gas adsorption ability, such as porous ores such as zeolite stone, and there are various deoxidizing materials, such as those that use activated carbon and activated iron oxide. I use it.

Next, a second embodiment of the present invention will be described.

FIG. 3 is a developed plan view of an auxiliary corrugated board based on a heat-preserving, heat-insulating corrugated board according to a second embodiment of the present invention.

In this embodiment, explanations of structures and configurations similar to those of the first embodiment will be omitted.

The heat-preserving and heat-insulating corrugated board base of this embodiment consists of an Al type top oven type corrugated board base 1 and an auxiliary corrugated board 2.

The auxiliary corrugated board 2 of this embodiment has a bottom interposed plate 2a smaller than the inner bottom dimension of the corrugated board base l, and the bottom interposed plate 2a is
Flap-shaped side intervening plates 2b are connected to the 41!1 sides of a through the folded ruled lines, and the corrugated cardboard base 1
When placed inside the cardboard box, the side intervening plates 2b can be fixed by the elasticity of the cardboard, resulting in a fresh and heat-insulating cardboard base.

The rest of the structure is almost the same as that of the first embodiment.

Here, even if the angle of the guide surface 2C is made small so that the side intervening plate 2b is almost perpendicular to the bottom intervening plate 2a, if the outward elastic force is used, the inner side of the corrugated board base l Can be installed. Furthermore, in this case, if the upper edge of the side intervening plate 2b is processed so as to be crushed from the inside, the upper edge will become thinner, making it easier to insert the contents.

Although there are various configurations of the auxiliary corrugated board 2, the bottom intervening board 2a, the side intervening board 2b, and the top intervening board may be formed separately, or may be bonded to the inner surface of the corrugated board base 1 in advance. .

Effects of the Invention As is clear from the above, according to the present invention, the face can be folded and fresh vegetables, refrigerated foods, frozen foods, etc. can be easily packed, and the temperature can be maintained within the required temperature range for as long as possible. The invention has a great effect because it is possible to obtain an inexpensive fresh-preserving insulation corrugated board that has a large heat-insulating effect, a fresh-preserving effect, does not cause waste pollution, can be recycled, and saves resources. .

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway schematic perspective view of the preservation-insulating corrugated cardboard base of the first embodiment in a packed state, Fig. 2 is a perspective view of the auxiliary corrugated cardboard, and Fig. 3 is the auxiliary corrugated cardboard of the second embodiment. This figure shows a developed plan view.

Claims (1)

[Scope of Claims] 1) Consisting of a cardboard box and an auxiliary cardboard box, the auxiliary cardboard box is interposed inside at least the bottom and sides of the cardboard box to thicken the air layer at the bottom plate and side plates of the box. 1. A freshness-preserving and heat-insulating cardboard box, which can be installed so that the auxiliary cardboard box can absorb gas. 2) The heat-preserving and heat-insulating cardboard box according to claim 1, wherein a gas adsorbent is added to at least the inner liner of the auxiliary cardboard. 3) The heat-preserving and heat-insulating cardboard box according to claim 1, wherein at least the inner liner of the auxiliary cardboard is coated with a gas adsorbent.