JP2005088924A - Cold insulation box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cold insulation box which has a plate-like interior foam built in so as to cover six inner sides of a box body such as a corrugated fiberboard-made box, has an excellent cold insulation effect, distributes in a large amount by a small cargo vehicle when carrying the boxes to stores and companies handling fresh foods or the like, is stored in a very small space even in a non-used mode, and can be handled as general incineratable wastes when the boxes are unnecessary. <P>SOLUTION: The cold insulation box comprises a box body A which is assembled and folded in a substantially flat plate shape, and a plate-like interior foam 1 mainly consisting of paper powder component or plant powder component and comprising a side surface foam plate part 1a, a top surface foam plate part 1b and a bottom surface foam plate part 1c to internally cover six interior surfaces of the box body A. Each plate-like interior foam 1 is stacked on the box body A which is folded in a substantially flat plate shape to form one set. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  In the present invention, a plate-like foam interior material is built in so as to cover the inner surface of a box such as a corrugated cardboard box, has an excellent cooling effect, and is used in shops and offices that handle fresh foods. When transporting, a large amount can be delivered by a small luggage vehicle, and it can be stored in a very small space even when not in use. When it is no longer needed, it is handled as ordinary incinerated waste. The present invention relates to a cool box excellent in the natural environment.

  At present, for foodstuffs, particularly fresh food products, box-shaped bodies made of expanded polystyrene are actively used for storage and transportation because of their excellent cooling effect. However, those made of polystyrene foam as shown in Patent Document 1 cannot be folded even when not in use, are bulky, and require a large space for storage. In addition, after use, the box made of polystyrene foam cannot be discarded as general waste because it generates dioxins when it is burned, and is separated and discarded as non-combustible waste. It is a current situation that is causing social problems. In particular, at present, in the fish market and the like, the amount of use of the styrofoam box-like body is enormous, and its processing is regarded as a problem nationally.

  By the way, it is said that the percentage of food discarded in the distribution process is as high as 20% in Japan due to quality deterioration such as a decrease in freshness. If this is added to what is disposed of in the production area and what is disposed of in the home or restaurant, it is estimated that 30% to 40% of the produced food is discarded without being used. On the other hand, in developing countries where packaging and distribution technologies are immature, the proportion of food that is discarded without being used is considered to be even higher. Currently, the world's food production is said to be sufficient to feed the entire population, but in some areas it is perished too much due to insufficient freshness and distribution technologies. In some areas, there is a shortage that suffers from hunger.

  Therefore, if the shelf life of only about 3 days can be extended to 30 days with the freshness preservation technology, it has the same effect as doubling the food yield per unit area. It is said. Furthermore, maintaining freshness not only has the effect of extending shelf life, but also has the effect of improving food quality by preventing food poisoning and providing more delicious food.

  Therefore, in order to meet the above-mentioned demands, various materials that can be used for agricultural sheet materials, etc. that have excellent cold-retaining ability, and that are particularly excellent in maintaining the freshness of vegetables and fruits that have been difficult to maintain freshness. Has been. Many of these materials are plastic products such as polystyrene foam and polyurethane, and have excellent performance. However, the above materials are not easy to recycle and generate a harmful gas such as dioxin at the time of incineration, which has a high impact on the global environment. However, it is not easy to develop products that are harmless and have excellent performance such as polystyrene, and efforts are being made to solve problems in laboratories around the world, but they have not yet been solved. .

JP-A-9-94054

  In general, as shown in Patent Document 1 described above, the cold box is made of foamed styrene, which is bulky even when not in use, and is stored when stored. In the case of a large amount, a large storage space is occupied. In addition, such a cold box is manufactured at a factory and transported to a store, factory or business office that handles general fresh foods, etc. There is a problem in this regard.

  For this reason, the cold storage box when not in use can be stored in a very compact state, and when used as a cold storage box, it is desired that a normal cold storage space can be secured. Furthermore, when the cool box is no longer needed and discarded, it is desired that it can be burned as general waste. That is, development of a cold box that is friendly to the natural environment is required. The problem (technical problem or object) of the present invention has been developed for the purpose of satisfying the above demand.

  Therefore, as a result of intensive studies and researches to solve the above problems, the inventor has as its main components a box body that can be assembled and folded into a substantially flat plate shape and a paper powder component or a plant powder component. , Comprising a plate-like foamed interior material comprising a side foam plate portion, a top foam plate portion, and a bottom foam plate portion that are installed so as to cover the inner six surfaces of the box, and is folded into a substantially flat plate shape. In addition, the above-described problems are solved by stacking the respective plate-like foamed interior materials on the box body to form a cold storage box as a set.

  Further, in the above-described configuration, the folded state of the box body and the plate-shaped foam interior material are fastened and fixed with a band material, or the folded box body, the plate-shaped foam interior material, By packaging the stacked state with bag material, it can be stored and used more efficiently. Further, the components of the plate-like foamed interior material are 10 to 40% by weight of paper powder component or vegetable powder component, 25 to 40% by weight starch component as an auxiliary agent, and 35 to 50% by weight polyolefin resin. Furthermore, the polyolefin resin can be polypropylene resin or polyethylene resin, and the main component of the plate-shaped foam interior material can be easily burned when it is no longer needed by using government postcards. It can be disposed of and solves the above problems. Further, in the above-described configuration, the side foamed plate portion is fixed to the inner surface side of the housing side surface portion of the box via an adhesive, and is a cold box that can be deformed into a flat shape when the box is folded. Thus, the above problem is solved.

  According to the invention of claim 1, the box is foldable into a substantially flat plate shape, and the plate-like foam interior material can be stacked on the folded box body. Even if it is a large amount of cold storage boxes by combining the foamed interior material with one set, the size of the storage place is sufficient with a very small space. In addition, when transporting only these cold storage boxes to fresh food such as fresh fish, vegetables and fruits, or stores handling plants, etc., a sufficiently large number of cold storage boxes are transported even with a vehicle having a relatively small storage unit. can do. Furthermore, when this cold storage box is used, it can be easily assembled just by arranging it so that the plate-like foam interior material is positioned on the six surfaces inside.

  Next, according to the invention of claim 2, since the folded state of the box and the plate-shaped foam interior material are fastened and fixed with the band material, as described above, only the cold box is made of fresh fish. It is possible to prevent collapse of cargo when transported to fresh foods such as vegetables and fruits, or stores handling plants and the like. In the invention of claim 3, the same effect as that of claim 2 can be obtained. According to the invention of claim 4, the cold box of the present invention has an excellent cold holding performance. Further, according to the invention of claim 5, the disposal when the cold box is no longer necessary is very good in terms of environmental conservation. Furthermore, according to the invention of claim 6, by using a government-made postcard as the paper powder component, the plate-shaped foamed interior material can maintain the freshness of fresh products for a long time. According to the invention of claim 7, the cold box can be assembled simply and quickly.

  The main constituent members of the present invention are a box A and a plurality of plate-shaped foamed interior materials 1, 1,. First, the plate-like foam interior material 1 is composed of about 10 to 40% by weight of a paper leaf component or a vegetable powder component of government-made postcard paper or general waste paper, and about 25 to 40% by weight of starch (such as corn starch) as an auxiliary agent. And about 35 to 50% by weight of a polypropylene resin component. In the present specification, the above-mentioned government-made postcard waste paper refers to waste paper generated in the government-made postcard manufacturing process, waste paper such as soiled paper, and soiled paper generated in the household used. Moreover, as a vegetable powder component, it is powders, such as food residues, such as bran, tea leaf husk, corn straw, and okara. Further, an increase or decrease of about 10% of each component is included in the present invention.

  The government-made postcard waste paper is first roughly pulverized (pulverized) by a mixer cutter type pulverizer, and then finely pulverized by a mill type pulverizer, and collected as a powder by a dust collector. The paper powder component as such a paper powder is kneaded with the starch component using a kneader, heated and melted together with the polypropylene resin component, and extruded using a twin screw extruder with water as a foaming medium. The plate-shaped foam interior material 1 is manufactured. It is preferable to pulverize the government-made used postcard paper into a powder (about 150 to 80 μm particle size) that has passed through a 100 to 200 mesh sieve.

  The proportion of the raw material composition of the foam of the present invention is such that the proportion of the polypropylene resin component in the whole is about 50% by weight, whereby a foam can be obtained. From the viewpoint of effective use of government-made postcard paper, it is desirable that the ratio of the polypropylene resin component is 50% by weight or less, and the composition ratio of the government-made postcard paper is 10% by weight or more, and as much as possible. Even if the proportion of the polypropylene resin component is 50% by weight or more, it is possible to obtain a foam that is substantially the same as described above.

  Next, the manufacturing method of the plate-shaped foam interior material 1 which has a government-made postcard used paper as a main component is demonstrated. First, waste paper of government-made postcards is roughly pulverized by a mixer cutter type pulverizer and crushed into pieces of about 15 to 20 mm. Then, it is finely pulverized by a mill-type pulverizer to obtain a paper powder component of government-made postcard waste paper of about 200 mesh. Next, the paper powder component of the finely pulverized government-made postcard paper and the starch component which is an appropriate industrial starch are mixed. Then, a polypropylene resin component (granule) and water are mixed with the paper powder component and the starch component, followed by heating and kneading. By extruding the component thus formed from an extruder as a high-temperature heating cylinder, as shown in FIG. 16, FIG. 17 (A), (B), etc., an extrusion metal provided at the outlet end of the extruder The plate-shaped foam interior material 1 can be manufactured by passing through the mold 5 and the extrusion mold 7.

  The extrusion mold 5 has a rectangular shape in cross section and a flat vertical body shape having an appropriate length. In the cross section, a plurality of holes 6, 6,... The hole diameter is about 2 mm to about 3 mm. The plurality of holes 6 coming out of the plurality of holes 6 are bonded to each other by passing through an extrusion mold 7 in which a gap having a rectangular cross section is formed, whereby the plate-like foam interior material 1 is formed. This extrusion direction is configured to pass from the right to the left as indicated by the arrows in FIG.

  Next, a specific manufacturing process of the plate-shaped foamed interior material 1 will be described based on a flowchart (see FIG. 18). First, used postcard waste paper is roughly crushed into fragments of about 15 to 20 mm by a mixer cutter type grinder (see S1). The coarsely pulverized paper pieces are finely pulverized with a mill type pulverizer (see S2). This fine powder is sucked from the upper part of the fine pulverizer with a 2.2 kw suction pump while adjusting the suction opening scale, and is sucked into the air to pass through a 100-200 mesh sieve. 80 μm particle size). Up to now, this is the process of making government-made postcard paper into a paper powder component. The paper powder component and the starch component, which is a modified starch for industrial use, are added and mixed at a weight ratio of 4 to 6 (see S3). Then, water is appropriately supplied to such a paper powder component of 24% by weight, a starch component of 36% by weight, and a polypropylene resin component of 40% by weight and well kneaded with a kneader (see S4). The paper powder component, starch component, and polypropylene resin component are charged into the extruder (see S5).

  As shown in FIG. 15, the extrusion mold 5 for the plate-like foam interior material 1 has a cross section of about 105 mm, a height of 22 mm, and circular holes 6 with a hole diameter of about 2.5 mm arranged in a staggered manner. 23 in total, with a mold thickness of about 10 mm, immediately after exiting the plurality of holes 6, a circular string is formed, and the plurality of these are closely attached to each other, and the frame-shaped said After passing through the extrusion mold 7, it is slightly shrunk, and a strip-like foamed interior material having a width of about 100 mm and a height of about 20 mm is extruded (see S6). Then, immediately after leaving the extrusion mold 5 and the extrusion mold 7, the plate-shaped foamed interior material 1 can be manufactured by cutting with a cutter at a desired length, for example, 45 cm (see S 7). Moreover, in order to manufacture the plate-shaped foam interior material 1 from the paper powder component of general waste paper or a vegetable powder component, it is the same as that of the manufacturing method which uses government-made postcard waste paper as a main component, The description is abbreviate | omitted.

  As shown in FIG. 17A, the extrusion mold 5 has a total of 17 circular holes 6 in a staggered arrangement with a circular width 6 having a width of about 80 mm, a height of 22 mm, and a hole diameter of about 2.5 mm. In this example, a strip-shaped foam interior material having a width of about 70 mm × height of about 20 mm and an appropriate length (for example, about 30 cm) is formed. Further, as shown in FIG. 17B, an embodiment in which a total of 28 circular holes 6 having a cross-section of about 105 mm, a height of 44 mm, and a hole diameter of about 2.5 mm are opened in a staggered arrangement, as shown in FIG. Is also present. When this is formed, a strip-shaped foamed interior material having a width of about 100 mm and a height of about 40 mm and an appropriate length (for example, about 30 cm) is formed. Thus, even if the thickness (height) is about 20 mm or 40 mm, the width is 100 mm. Therefore, in the case of 280 mm, for example, two of 100 mm and one of 80 mm Are formed by bonding with an adhesive or the like. Further, by increasing the size of the extruder, it is possible to produce a plate-shaped foam interior material 1 having a thickness (height) of about 50 mm, a width of about 200 to 300 mm, and an appropriate length of about 50 cm to 1 m.

  The plate-shaped foam interior material 1 can contain a lot of air, and moreover, it is rich in hygroscopic mass change like cork, so that it becomes an element of rot odor discharged from fruits and vegetables At the same time as preventing the occurrence of, it can exhibit an excellent cold insulation and heat insulation effect. In particular, the plate-shaped foamed interior material 1 can maintain the humidity and temperature of the main body of fruits, vegetables, etc. for a long time. Further, the plate-like foam interior material 1 is rich in elasticity and resilience, can protect products gently, is light like a polystyrene foam, and has a heat retention performance that exceeds that of a polystyrene foam. Furthermore, no harmful gas such as dioxin is produced even if it is burned, it is safe, and the combustion temperature is low, so that it does not impose an incinerator or the like. Further, it is easily deformed and is suitable for a cushioning material.

  Next, the box A is formed from cardboard, such as corrugated paper, and is composed of a storage side surface portion 2, a lid portion 3, and a bottom portion 4. The box A can be folded into a substantially flat plate shape. The accommodating side surface portion 2 is a portion having four side surfaces, and is formed of horizontal side surfaces 2a and 2a and vertical side surfaces 2b and 2b. When the storage side surface 2 is square, the horizontal side surface 2a and the vertical side surface 2b have the same dimensions. When the storage side surface portion 2 is rectangular, the horizontal side surface 2a is more than the vertical side surface 2b. The size becomes larger or smaller. The ratio of the dimensions of the lateral side surfaces 2a, 2a and the vertical side surfaces 2b, 2b is appropriately set depending on the shape of the box A.

Next, the cover part 3 is comprised from a pair of main cover pieces 3a and 3a and a pair of sub cover pieces 3b and 3b, as shown to FIG. 3 (B). And after a pair of sub lid pieces 3b and 3b are closed previously, a pair of main lid pieces 3a and 3a are closed. Further, as another type of the lid portion 3, as shown in FIG. 11 (B), it is composed of one main lid piece 3a and a pair of sub lid pieces 3b, 3b. An insertion piece 3a ₁ for opening and closing the accommodation side surface portion 2 through a folding line and being inserted into the accommodation side surface portion 2 is formed on the open / close free end side of the main lid piece 3a.

The bottom part 4 has various configurations, and as an example, as shown in FIGS. 6A and 6B, the bottom part 4 is composed of two bottom pieces 4a and 4a. 2 are formed to be continuously foldable on two adjacent side surfaces. Each bottom piece 4a is formed with a fold line so as to substantially coincide with the diagonal line of the accommodating side surface portion 2, and each bottom piece 4a is foldable via the fold line. Each bottom piece 4a, 4a is housed inside the housing side face 2 in the folded state. Each bottom pieces 4a are formed as corners substantially Naru perpendicular free-folded, interlocking protrusion 4a ₁ is formed on one end thereof. When the box A is assembled from the folded state, the bottom pieces 4a and 4a spread through the folding lines, and the corners of the bottom pieces 4a and 4a overlap each other, and the respective meshing protrusions 4a ₁ , 4a ₁ are arranged on both bottom pieces 4a, 4a to form a bottom portion 4 in a fixed state.

  And the plate-shaped foam interior material 1 is equipped so that the inside 6 surface comprised from the accommodation side part 2, the cover part 3, and the bottom part 4 of box A, such as a cardboard box, may be covered. The plate-shaped foam interior material 1 is composed of a side foam plate portion 1a, a top foam plate portion 1b, and a bottom foam plate portion 1c. The side foam plate portion 1a is mounted on the inner surface side of the housing side surface portion 2 of the box A, and the top surface foam plate portion 1b is located at the top portion of the box A, that is, under the lid portion 3 in the closed state. Be placed. Further, the bottom foam plate portion 1 c is disposed on the bottom portion 4 of the box A.

  The side foam plate portion 1a, the top foam plate portion 1b, and the bottom foam plate portion 1c constitute a cube and a rectangular parallelepiped, and are arranged on the inner side surface of the box A. A space surrounded by the side surface foam plate portion 1a, the top surface foam plate portion 1b, and the bottom surface foam plate portion 1c of the plate-shaped foam interior material 1 becomes the cold insulation storage portion Q [FIGS. ) And FIG. 13]. In the case of actual use, in the case of foodstuffs and fish with a lot of moisture, a vinyl bag or the like is used in the cold storage compartment Q. As the waterproof bag, a PE film that does not generate harmful gas such as dioxin even when incinerated may be used.

Further, the side foam plate portion 1a is composed of a lateral side foam plate piece 1a ₁ and a vertical side foam plate piece 1a ₂ , and the strip-like plate-like foam interior material 1 is formed with the lateral side foam plate piece 1a ₁ and the vertical side surface. constitute a continuous shape by foam board piece 1a _2. Further, the side foamed plate portion 1a is mounted and fixed in advance in the housing side surface portion 2 of the box A via an adhesive means such as an adhesive. In this case, when the box A is folded, the side foam plate 1a mounted inside is also folded together with the accommodating side surface 2 [FIGS. 6A, 6B, 6C]. )reference〕. In the present invention, there are a first type and a second type in the configuration of the side foam plate portion 1a attached to the accommodation side surface portion 2. First, in the first type, as shown in FIG. 5 (C), the sheet-shaped foamed interior material 1 is formed of a single sheet having a relatively thin thickness. As shown in FIG. The side foamed plate portion 1a is formed by being bent into a square shape or the like.

  Then, as shown in FIG. 3 (B), FIG. 5 (B) and the like, it is fixed to the lateral side surfaces 2a, 2a and the longitudinal side surfaces 2b, 2b of the housing side surface portion 2 of the box A through an adhesive means such as an adhesive. It is what is done. With this configuration, as shown in FIGS. 6A and 6B, the box A can be folded into a substantially flat plate shape, and the side foam plate portion 1a in the housing side surface portion 2 can be folded. it can. As described above, the side foamed plate portion 1a can be easily folded as the thickness thereof is relatively thin. Therefore, it is preferable to appropriately set the thickness of the side foam plate portion 1a while maintaining a balance between the cold insulation effect and the ease of folding the box A.

Further, the other top surface foam plate portion 1b and bottom surface foam plate portion 1c corresponding to the first type side surface foam plate portion 1a are slightly different in size. That is, the size of the bottom surface foamed plate portion 1c is surrounded by the lateral side foam plate pieces 1a ₁ and 1a ₁ and the vertical side surface foam plate pieces 1a ₂ and 1a ₂ mounted in the housing side surface portion 2 of the box A. There is something that is attached to the place. Further, in the top surface foamed plate portion 1b, the upper portion of the box A is set to a region where the side foamed plate portion 1a is not mounted, that is, that is, the housing side surface portion 2 of the box A. The size of the top surface foamed plate portion 1b is set so that the top surface foamed plate portion 1b can be directly disposed on the inner surface (see FIG. 5A).

Further, as a second type in the configuration of the box A and the side foam plate 1a, the side foam plate 1a is not mounted and fixed in advance on the housing side 2 of the box A, and the top foam plate 1b, the bottom foam Similar to the plate portion 1c, the side foam plate portion 1a is attached to the housing side surface portion 2 together with the assembly of the box A. In the second type, the side foam plate portion 1a, the top foam plate portion 1b, and the bottom foam plate portion 1c may have the same thickness. Further, as shown in FIG. 12, the side foam plate portion 1a is composed of two lateral side foam plate pieces 1a ₁ and two vertical side foam plate pieces 1a ₂ made of different materials, and these are combined. As shown in FIG. 11A, a box shape is formed.

  When the cold box of the present invention is shipped from a factory, the box A is folded into a substantially flat plate shape, and the plurality of plate-like foamed interior materials 1, 1 installed in the box A having the flat plate shape. , ... are set to be stacked, and this is one set. The plate-like foamed interior materials 1, 1 corresponding to the lid portion 3 and the bottom portion 4 of the box A have a larger area than the plate-like foamed interior materials 1, 1,. First, the plate-shaped foam interior materials 1 and 1 corresponding to the lid 3 and the bottom portion 4 are arranged on the box A folded in a flat shape. Are disposed on the four surfaces of the remaining accommodating side surface 2 (see FIG. 1A). This is the most stable set state. And what was made into this set with this box A and the plate-shaped foam interior material 1,1, ... by which it is equipped is piled up and stored [refer figure (B)].

  Then, the set of the folded box A and the plate-like foamed interior materials 1, 1,... Are fastened and fixed with a band material 8 as shown in FIGS. Thus, a more stable set state can be achieved. The strip 8 is preferably a synthetic resin flat tape, flat string or the like. When a synthetic resin tape is used, the ends may be joined by heat-sealing, or may be connected using a metal fitting. Further, the pair of folded boxes A and the plate-shaped foam interior materials 1, 1,... May be covered and packaged with a film-shaped packaging material 9, as shown in FIGS. . Specifically, the packaging material 9 is made of a synthetic resin film such as vinyl or a thin film sheet, and the folded box A and the plate-shaped foam interior materials 1, 1,. In other words, it is coated in a so-called vacuum packed state so as to be in a substantially fixed state. As a result, the box A and the plate-like foamed interior materials 1, 1,... Are not easily soiled and can be kept clean.

  According to the present invention, the box A is foldable, and can be formed into a substantially flat plate shape by folding the lid portion 3 and the bottom portion 4 so as to be unfolded from the accommodating side surface portion 2. The plurality of plate-shaped foam interior materials 1, 1,... That are internally mounted in the substantially flat plate-like box A are stacked, and the box A and the plurality of plate-shaped foam interior materials 1 made into a substantially flat plate shape by various means. , 1,... Can be formed into a good shape by fixing the stacked state with various means and making them one set.

  In particular, as in the first type of the side foam plate portion 1a described above, the side foam plate portion 1a is internally fixed to the accommodation side surface portion 2 by an adhesive means such as an adhesive in advance, as shown in FIGS. As shown in B), only the top surface foamed plate portion 1b and the bottom surface foamed plate portion 1c are stacked on the folded box A, and can be combined extremely compactly. In addition, with such a set, a plurality of sets can be stacked in a stable state, and an extremely small space is sufficient when a large amount of cold storage boxes are stored. Further, the side foamed plate portion 1a of the plate-shaped foam interior material 1 is mounted in advance on the accommodating side surface portion 2 of the box A, and the side foamed plate portion 1a is fixed to the accommodating side surface portion 2 with an adhesive. Thus, the cold box can be assembled simply and quickly.

Next, in the above-described second type of the side foam plate portion 1a, the lateral side foam plate piece 1a ₁ and the vertical side foam plate piece 1a ₂ constituting the side foam plate portion 1a are all made of different materials, and contain side surfaces. In the case where the part 2 is not mounted in advance, the folded state of the box A can be made further flat as shown in FIG. Further, the side foam plate portion 1a is not limited to a particularly thin thickness, and can be made to have the same thickness as the other top surface foam plate portion 1b and bottom surface foam plate portion 1c. The cold insulation can be set appropriately.

  The cold storage box of the present invention plays a sufficient role in a vehicle having a small cargo bed when transporting a large amount of the cold storage box to a store or business office handling fresh food such as meat, fish shellfish, vegetables and fruits or fruits. Can be fulfilled. For these things, fruits and vegetables perform various substance metabolisms after harvesting and carry out respiratory activities to maintain life. The intensity of this respiratory activity varies depending on the type and quality of fruits and vegetables, and differences in organs and parts, but it is generally known that the level of maturity is young and developing. In addition, the respiratory action causes wear of components related to taste such as sugar and organic acid. Therefore, in order to maintain the quality of fruits and vegetables, it is important to suppress respiratory action.

  Since the plate-like foamed interior material 1 in the present invention is in a state of breathing because it is rich in hygroscopic mass change like cork, it can not only help to suppress the respiratory action of fruits and vegetables, but also transpiration at the same time. It helps the action. And the chemical energy acquired by the respiration of fruits and vegetables after harvesting is almost released as heat. This is called respiratory fever and causes "steaming" when handling fruits and vegetables in large quantities. It goes without saying that these heats together cause a significant decrease in the freshness and quality of fruits and vegetables. Also from that point, the plate-like foam interior material 1 according to the present invention has a high foaming density and contains a lot of air, so that it has a high degree of cold insulation and heat insulation and can prevent the fruits and vegetables from being steamed, and can maintain the freshness for a long time. In particular, the freshness of fresh products stored and stored inside can be kept even better by configuring the side foam plate portion 1a, the top foam plate portion 1b, and the bottom foam plate portion 1c in a box state. .

  Ethylene gas is a growth hormone produced by plants. It exhibits a great number of physiological functions such as promotion and suppression of growth, promotion and suppression of flowering, fruit ripening, promotion of aging, and promotion of respiratory action. From the standpoint of holding, the ripening of fruits, the promotion of aging and the promotion of green retirement (yellowing) are particularly problematic. Of course, to maintain the freshness of fruits and vegetables, it is necessary to prevent ethylene gas from accumulating in the environment in which they are handled. For this purpose, an environment friendly to fruits and vegetables, such as transpiration, prevention of “steaming” at an appropriate temperature, relative humidity environment, and respiratory heat of fruits and vegetables, is necessary. Also from such a point, the plate-like foam interior material 1 in the present invention is excellent in overall and comprehensive ability as a gentle protection of fruits and vegetables. In the present invention, a freshness retention of about 1.8 times (pear, peach, etc.) is confirmed in comparison with other products such as cardboard and polystyrene foam.

  In particular, the plate-like foam interior material 1 is expected to play a very important role in transporting and storing fruits and vegetables in all respects in the environmental society. In addition, when handling fruits and vegetables in quantity units, these conditions combine to produce a synergistic effect and prevent deterioration in the freshness and quality of the fruits and vegetables. As a result, fresh foods can maintain freshness over a long period of time. Can be made difficult to fall off or rot. Furthermore, useful recycling is realized by using the waste paper of the government-made postcard as the material of the plate-shaped foam interior material 1. Therefore, in the present invention, after use, it can be incinerated as general garbage, and the combustion temperature is low, and it is friendly to people and the earth that does not generate harmful substances such as dioxins.

(A) is a perspective view which shows the 1st type of this invention, (B) is a vertical side view of (A). (A) is the perspective view of a plate-shaped foam interior material, (B) is the perspective view made into the substantially flat plate shape of the box. (A) is a perspective view of the top surface foam board part and bottom face foam board part in a 1st type, (B) is a perspective view of the box body by which the side surface foam board part was mounted | worn and assembled. It is the perspective view which made the side foam board part, the top face foam board part, and the bottom face foam board part into the decomposition | disassembly state. (A) is a longitudinal side view of a cold box, (B) a transverse plan view of the cold box, and (C) is a perspective view of a flat side foam plate portion. (A) is a cross-sectional plan view of the assembled box, (B) is a cross-sectional plan view in the middle of folding, (C) is a vertical side view in a state where the top foam plate portion and the bottom foam plate portion are arranged. FIG. (A) is the perspective view of the state which fixed the box, the top surface foam board part, and the bottom face foam board part with the strip | belt material in the 1st type of this invention, (B) is a vertical side view of (A). . (A) is a perspective view of the state which fixed the box, the top surface foam board part, and the bottom face foam board part with the packaging material in the 1st type of this invention, (B) is a vertical side view of (A). . (A) is a perspective view which shows the 2nd type of this invention, (B) is a vertical side view of (A). (A) is the perspective view of a plate-shaped foam interior material, (B) is the perspective view made into the substantially flat plate shape of the box. (A) is a perspective view of the state which combined the plate-shaped foam interior material in the box shape, (B) is a perspective view of the assembled box. It is the perspective view which made the plate-shaped foam interior material into the decomposition | disassembly state from the box shape in the 2nd type of this invention. It is a vertical side view of the state which equipped the box-shaped foam interior material in the box in the 2nd type of this invention. (A) is the perspective view of the state which fixed the box and the side foam board part, the top surface foam board part, and the bottom face foam board part with the strip | belt material in the 2nd type of this invention, (B) is (A). It is a vertical side view. (A) is a perspective view of a state in which the box and the side foam plate portion, the top surface foam plate portion, and the bottom surface foam plate portion are fixed by the packaging material in the second type of the present invention, and (B) is a diagram of (A). It is a vertical side view. It is a perspective view of the metal mold | die which manufactures a plate-shaped foam interior material. (A) is a front view of an extrusion mold, (B) is a front view of another extrusion mold. It is a flowchart of the process of manufacturing a plate-shaped foam interior material.

Explanation of symbols

DESCRIPTION OF SYMBOLS A ... Box body 1 ... Plate-shaped foam interior material 1a ... Side surface foam board part 1b ... Top surface foam board part 1c ... Bottom foam board part 8 ... Band material 9 ... Packaging material

Claims (7)

A box that is assembled and foldable into a substantially flat plate shape, and a side foam plate portion that is mainly composed of a paper powder component or a plant powder component and covers the inner surface of the box body, and foamed on the top surface. It is composed of a plate-like foam interior material composed of a plate portion and a bottom foam plate portion, and is characterized in that each of the plate-like foam interior materials is stacked on the box body that is folded into a substantially flat plate shape to form one set. Cold storage box. The cold insulation box according to claim 1, wherein the folded box body and the plate-shaped foam interior material are stacked and fixed with a belt material. 2. The cold insulation box according to claim 1, wherein the folded box and the foamed foam interior material are packaged with a packaging material. In Claim 1, 2, or 3, the component of the said plate-shaped foam interior material is 10-40 weight% paper powder component or vegetable powder component, 25-40 weight% starch component as an adjuvant, and 35-35%. A cold box comprising 50% by weight of a polyolefin resin. 5. The cold insulation box according to claim 4, wherein the polyolefin resin is a polypropylene resin or a polyethylene resin. The cold insulation box according to claim 1, 2, 3, 4, or 5, wherein a government-made postcard is used as a main component of the plate-shaped foamed interior material. 7. The side foam plate portion according to claim 1, wherein the side foamed plate portion is fixed to an inner surface side of the housing side surface portion of the box through an adhesive, and is deformed into a flat shape together with the folding of the box. A cold box characterized by being free to use.

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