JP3075713U - Insulated box with built-in plate-shaped foam - Google Patents

Abstract

(57) [Summary] (Modifications) [Problem] To make a plate-like foam mainly composed of a paper powder component or a vegetable powder component of an old government-made postcard cover six inner surfaces of a box such as a cardboard box. The plate-shaped foam is excellent in cooling effect, and can be incinerated as general garbage after transportation, so that it is excellent in natural environment. SOLUTION: A plate-like foam 1 mainly composed of a paper powder component of a postcard or a general waste paper or a plant powder component is used.
Are built in so as to cover the six inner surfaces of the box 2 such as a cardboard box. The inside of the box-shaped plate-shaped foam is used as the cold-reserving space 3.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 In the present invention, a plate-shaped foam mainly composed of a paper powder component or a vegetable powder component of an old postcard made of government-made postcards is built in so as to cover six internal surfaces of a box body such as a cardboard box, and has an excellent cooling effect. In addition, the present invention relates to a cold storage box with a built-in plate-like foam which can be incinerated as general garbage after transportation or the like and is excellent in a natural environment.

[0002]

[Prior art]

 At present, for foods, especially fresh foods, Styrofoam boxes are widely used for storage and transportation because of their excellent cooling effect. However, after use, the styrofoam box cannot be discarded as non-combustible garbage because it emits dioxin when burned, and is discarded as non-combustible garbage. At present, there is a lot of traffic and social problems are occurring. In particular, at present, in the fish market and the like, the amount of the styrofoam box used is enormous, and its treatment is regarded as a national problem.

[0003]

[Problems to be solved by the invention]

 For this reason, there is a demand for the development of a box-shaped body that has an excellent cooling effect during storage and transportation and that can be burned as general waste after use. In other words, there is a need for the development of cool boxes that are friendly to the natural environment. For this reason, the present invention has been developed with the purpose of solving these problems.

[0004]

[Means for Solving the Problems]

 The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems. As a result, the present invention is based on a cardboard box made of a paper powder component of an official postcard or general waste paper or a plant powder component. A cold box with a built-in plate-like foam, which is built-in so as to cover six surfaces inside a box body such as a box and has a box-shaped inside of the plate-like foam as a cold-holding space, or 10 to 40% by weight of a government-made product A plate-like foam comprising a paper powder component or a plant-based powder component of postcard waste paper or general waste paper, a starch component of 25 to 40% by weight, and 35 to 50% by weight of a polypropylene resin component as an auxiliary agent is a cardboard box or the like. The inside of the box body is covered so as to cover six surfaces, and the inside of the box-shaped plate-like foam is used as a cold-storage box with a built-in plate-like foam serving as a cold-holding void portion. The board after transport It is possible incineration of foam as a general waste, also the possible in excellent natural environment, it is obtained by eliminating the disadvantages or drawbacks.

[0005]

[Embodiment of the invention]

 The main component of the present invention is a plate-like foam 1. The plate-like foam 1 includes about 10 to 40% by weight of a paper powder component or a vegetable powder component of a postcard or general waste paper, and about 25 to 40% by weight of a starch (such as corn starch) component as an auxiliary agent. , About 35 to 50% by weight of a polypropylene resin component. In this specification, the official postcard waste paper refers to waste paper generated in the production process of the official postcard, waste paper such as stained paper, and stained paper generated in the home of use. The botanical powder component is a powder of bran, tea leaves, corn meal, food residues such as okara, and the like. Further, an increase or decrease of about 10% of each component is included in the present invention.

[0006] The postcard waste paper is first coarsely crushed (crushed) by a mixer cutter type pulverizer, and then finely pulverized by a mill (mortar) type pulverizer and collected as powder by a dust collector. Such a paper powder component as a paper powder is kneaded with a starch component using a kneading machine, heated and melted together with a polypropylene resin component, and extruded using a biaxial extruder using water as a foaming medium. Thus, the plate-like foam 1 is manufactured. It is preferable that the official postcard waste paper is pulverized 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 the foam can be obtained. From the viewpoint of effective use of postcards made of government-made postcards, it is desirable that the proportion of the polypropylene resin component be 50% by weight or less and the composition ratio of the postcards made by government-made postcards be 10% by weight or more, and be as large as possible. Even when the proportion of the polypropylene resin component is 50% by weight or more, a foam substantially similar to the above can be obtained.

[0008] Next, a method for producing the plate-like foam 1 mainly composed of postcard waste paper will be described. First, waste paper of a postcard made by government is coarsely crushed by a crusher of a mixer cutter system, 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 about 200 mesh used postcards made of official postcard. Next, the paper powder component of the finely ground official postcard waste paper and a starch component that is an appropriate industrial starch are mixed. Then, a polypropylene resin component (granules) and water are mixed with the paper powder component and the starch component, and the mixture is heated and kneaded. By extruding such a component from an extruder as a high-temperature heating cylinder, it passes through an extrusion die 5 and an extrusion mold frame 7 provided at the outlet end of the extruder, whereby the plate-like foam 1 is formed. Can be manufactured.

The extrusion die 5 has a rectangular cross section and a flat rectangular shape having an appropriate length. A plurality of holes 6, 6, ... penetrate in the length direction inside the cross section. The hole diameter is about 2 mm to about 3 mm. A plurality of the plurality of holes 6 formed in a string shape are bonded to each other by passing through an extrusion mold frame 7 in which a void having a rectangular cross section is formed, and the plate-like foam 1 is formed. This pushing direction is configured to pass from right to left as indicated by the arrow in FIG.

[0010] Such a plate-shaped foam 1 is incorporated so as to cover six internal surfaces of a box 2 such as a cardboard box. Specifically, as shown in FIG. 1, FIG. 2, and FIG. 4, plate-shaped foams 1, 1,... The inside is formed as a cold insulating space 3. In the case of actual use, in the case of foodstuffs or fishes having a large amount of water, a waterproof bag 4 such as a vinyl bag is used in the cool-keeping space 3. As the waterproof bag 4, a PE film that does not generate harmful gases such as dioxin even when incinerated may be used.

[0011]

EXAMPLE A specific manufacturing process will be described with reference to a flowchart of FIG. First, the official postcard waste paper is roughly crushed into pieces of about 15 to 20 mm using a crusher of a mixer cutter system (see S1). The coarsely pulverized paper fragments are finely pulverized by a mill-type pulverizer (see S2). This fine powder was sucked from the upper part of the fine pulverizer with a 2.2 kW suction pump while adjusting the suction opening scale, and then passed through a 100-200 mesh sieve.粒径 80 μm particle size). The process up to this point is to convert used postcards made of government-made postcards into paper powder components.

[0012] The paper powder component and the starch component, which is an industrially modified starch, are added and mixed at a weight ratio of 4 to 6 (see S3). Then, water is appropriately supplied to 24% by weight of such a paper powder component, 36% by weight of a starch component, and 40% by weight of a polypropylene resin component, and well kneaded by a kneader (see S4). The paper powder component, the starch component, and the polypropylene resin component are put into an extruder (see S5).

As shown in FIG. 5, a mold 5 for extruding the plate-like foam 1 has a cross section of about 105 mm, a height of 22 mm, and a circular hole 6 having a hole diameter of about 2.5 mm in a staggered manner. A total of 23 holes are opened in a shape array, the thickness of the mold is about 10 mm, and immediately after coming out of the large number of holes 6, a circular string is formed. After passing through the extruded mold 7, a strip-shaped foam having a width of about 100 mm and a height of about 20 mm is extruded (see S 6). Then, immediately after leaving the extrusion die 5 and the extrusion mold frame 7, the sheet is cut by a cutter at a desired length, for example, 45 cm, so that the plate-like foam 1 can be manufactured (see S7).

The production of the plate-like foam 1 from the paper powder component or the vegetable powder component of general waste paper is the same as the production method using a government-made postcard waste paper as a main component, and a description thereof will be omitted.

As shown in FIG. 6 (A), the extrusion die 5 has circular holes 6 having a width of about 80 mm, a height of 22 mm, and a hole diameter of about 2.5 mm in a staggered arrangement. There is also an embodiment in which the pieces are opened, and when molded, a strip-shaped foam having a width of about 70 mm × a height of about 20 mm and an appropriate length (for example, about 30 cm) is formed. Further, as shown in FIG. 6 (B), an example in which a total of 28 circular holes 6 having a hole diameter of about 2.5 mm are opened in a staggered arrangement within a cross section of about 105 mm and a height of 44 mm as shown in FIG. Also exists. When molded in this manner, a strip-shaped foam having a width of about 100 mm × a height of about 40 mm and an appropriate length (eg, about 30 cm) is formed.

As described above, even if the thickness (height) is about 20 mm or 40 mm, the width is 100 mm. Therefore, in the case of a desired width, for example, 280 mm, two of 100 mm and 8 It is constructed by adhering one of 0 mm with an adhesive or the like. In addition, by increasing the size of the extruder, it is possible to produce a plate-like foam 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.

As a specific experimental example, as the cool box of the present invention, the box 2 is a cardboard box, the height (thickness) of the plate-like foam 1 is 20 mm, and the six sides of the cardboard box are used. The plate-shaped foam 1 was stacked on the inner surface side, and the internal volume was set to about 275 mm × 175 mm × 205 mm = about 9.9 liters. On the other hand, a commercially available insulated box for transportation, that is, a commercially available insulated box for transportation is made of only styrofoam having a thickness of about 18 mm, and its content is about 275 mm × 175 mm × 100 mm = about 4.73 liters. Met. In this case, one bag of rock ice (1,100 g) is placed in the cool box of the present invention and a cool box for commercial transportation, stored at room temperature of 26 ° C. for 14 hours, opened after storage, and the remaining ice is removed. The weight was measured.

In the cool box of the present invention, about 610 g of rock ice remained. In the commercial cool box, about 590 g of rock ice remained. Therefore, the cooling effect was equivalent to that of a commercially available styrene foam transport cooling box.

[0019]

[Effect of the invention]

 First, in the invention of claim 1, a plate-like foam 1 mainly composed of a paper powder component of a postcard or a general waste paper or a plant powder component covers six inner surfaces of a box 2 such as a cardboard box. The box-shaped foamed foams 1, 1,... Formed as described above are formed into a cold-insulated box with a built-in foamed-walled foam, and the inside of the foamed foams 3 is used as the cold-insulating cavity 3, so that they have excellent cooling performance. In addition, there is an advantage that the pollution-preventing plate-like foam 1 can be provided.

In particular, in the invention of claim 1, the plate-like foam 1 is built-in so as to cover the six inner surfaces of the box 2, and the inside of the box-like plate-like foams 1, 1,. Is used as the cold-storage space 3, so that putting foodstuffs or fish into the cold-storage space 3 can provide a sufficient cooling effect, and is similar to the storage performance of the conventional styrofoam. There are advantages that can be used. In addition, while the government-made postcards were used only for ordinary recycled paper, the present invention can be used much more effectively.

Next, in the invention of claim 2, 10 to 40% by weight of a paper powder component or a vegetable powder component of official postcard waste paper or general waste paper, and 25 to 40% by weight of a starch component as an auxiliary agent; A plate-like foam 1 comprising 35 to 50% by weight of a polypropylene resin component is incorporated so as to cover six inner surfaces of a box 2 such as a cardboard box, and the plate-like foam 1, 1 having a box shape is provided. By using a cold box with a built-in plate-like foam inside which serves as a cold-holding cavity 3, an excellent cold-holding performance can be obtained, and in particular, an effect such as a pollution-prevention-type plate-like foam 1 can be obtained. Play.

In particular, since the polypropylene resin component contained in the plate-like foam 1 in the invention of claim 2 is a chain hydrocarbon polymer having no benzene ring, the polypropylene resin component may be a polystyrene foam or a polystyrene foam which has been widely used. On the other hand, in the case of the combustion treatment, no harmful soot is emitted, and after combustion, mainly carbon dioxide and water vapor, and the calorific value of combustion is smaller than that of polystyrene or styrene foam. Therefore, since the plate-like foam 1 can be burnt and disposed together with general household waste, a favorable effect can be obtained from the viewpoint of global environmental protection.

In the invention of claim 3, 10 to 40% by weight of a paper powder component or a vegetable powder component of official postcard or general waste paper, and 25 to 40% by weight of a starch component as an auxiliary agent; A plate-shaped foam 1 made of a polypropylene resin component of about 50% by weight is built-in so as to cover six inner surfaces of a box 2 such as a cardboard box, and the box-shaped plate-shaped foam 1, 1, 1 ... A cold box with a built-in plate-like foam inside which serves as a cold-holding cavity 3 is used for storage or transportation because the plate-like foams are joined in close contact within the box 2. However, there is an advantage that the heat insulation performance and the cold insulation performance are further improved, and that it can be provided as a good cold insulation box.

[Brief description of the drawings]

FIG. 1 is a perspective view of the present invention, in which six plate-like foams are formed in a box shape, and a box body into which the plate-like foam bodies are put is separated.

FIG. 2 is a sectional view of the present invention.

FIG. 3 (A) is a partial cross-sectional view showing a state where the plate-like foams are separated from each other; FIG. 3 (B) is a partial cross-sectional view showing a state where the plate-like foams are in close contact with each other;

FIG. 4 is an exploded perspective view showing a box-like shape made of six plate-like foams.

FIG. 5 is a partially cutaway perspective view of an extrusion die and an extrusion mold.

6 (A) and 6 (B) are front views of an extrusion die according to another embodiment.

FIG. 7 is a process chart for producing a columnar foam.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Plate-like foamed body 2 ... Box body 3 ... Insulated space

Claims (3)

[Utility model registration claims] Claims: 1. A plate-like foam mainly composed of a paper powder component or a vegetable powder component of an official postcard waste paper or a general waste paper,
A cold storage box with a built-in plate-shaped foam, which is built in so as to cover six surfaces inside a box body such as a cardboard box, and wherein the inside of the box-shaped plate-shaped foam is used as a cold-holding space. 2. 10 to 40% by weight of a paper powder component or a vegetable powder component of official postcard waste paper or general waste paper, 25 to 40% by weight of a starch component and 35 to 50% by weight of a polypropylene resin component as an auxiliary agent. A plate-like foam consisting of
A cold storage box with a built-in plate-shaped foam, which is built in so as to cover six surfaces inside a box body such as a cardboard box, and wherein the inside of the box-shaped plate-shaped foam is used as a cold-holding space. 3. 10 to 40% by weight of a paper powder component or a vegetable powder component of official postcard or general waste paper, 25 to 40% by weight of a starch component and 35 to 50% by weight of a polypropylene resin component as an auxiliary agent. A plate-like foam consisting of
It is built-in so as to cover six surfaces inside a box body such as a cardboard box, and the inside of the box-shaped plate-like foam is a cold-holding space, and the plate-like foams are substantially closely adhered in the box. An insulated box with a built-in plate-like foam, characterized by being joined.