JP3897738B2 - Ball for firework fireworks using biodegradable resin, and method for producing the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is safe because the ball skin is shredded and dropped after being fired, and it is safe to disassemble immediately after falling into the ground or water (including seawater), and does not need to be recovered or incinerated. The present invention relates to a leather and a manufacturing method.
[0002]
[Prior art]
The fireworks that are called “warimono” or “poka” generally have a structure in which explosives such as crackers, lightning agents, and stars for the production of fireworks effects are covered with a ball skin.
This ball skin is traditionally composed of multiple layers of explosive paper, such as old newspapers, arranged inside a hemisphere, and various explosives are arranged inside, and the endothelium is combined into a spherical shape. It is completed by thickly pasting the outer skin made of kraft paper.
Since the endothelium that is laminated and pasted in multiple layers and shaped into a hemisphere is inferior in production efficiency and requires skill in shaping, recently, a thick hard paper as the endothelium has been made into a hemisphere by press molding It has been replaced.
[0003]
[Problems to be solved by the invention]
However, as mentioned above, conventional firework ball skins are made of paper that has been overlaid or molded with a press, making it resistant to tearing and fragmenting when the split medicine explodes. Instead, many large (about several centimeters) pieces were scattered and when the amount of split medicine was small, there were many cases where it flew cracked from the joint. Among these large pieces, the unburned ball skin has a weight corresponding to the size, and thus has a large impact when dropped on the ground, which may cause harm to people, buildings, cars, and the like.
In addition, regardless of the size of the fragments, it has been necessary to collect and dispose of the scattered fragments the next day and to dispose of them.
Therefore, the inventors of the present invention have shredded the skin after launching and are therefore safe, and after being dropped on the ground or in water (including seawater), they quickly biodegrade and disappear, and therefore need to be recovered and incinerated. The aim is to propose a deep-fried firework ball skin.
[0004]
[Means for Solving the Problems]
The present invention has been proposed in view of the above, and a resin having biodegradability is used as a matrix, and 1 to 50% by weight of the resin and an incompatible biodegradable resin are melt-kneaded and mixed. The present invention relates to a ball for flying fireworks characterized by having a non-uniform structure having a mesh-like interface weaker than the matrix strength so that the ball peels into pieces after being fried.
[0005]
In the present invention, a biodegradable resin is used as a matrix, and one or more natural organic material powders having a particle size of 1 mm or less, such as wood powder and rice husk powder, which are incompatible with the resin (not dissolved), are 1 A ball for flying fireworks characterized by having a non-uniform structure having a network-like interface weaker than the matrix strength so that the ball skin is shredded and dropped after being ground by melting and kneading to ˜60 wt% Suggest skin.
[0006]
Furthermore, the present invention uses a biodegradable resin as a matrix, and at least 1 to 50% by weight of a biodegradable resin that is incompatible with the resin and / or a natural particle size having an incompatible particle size of 1 mm or less. 1 to 60% by weight or more of organic material powder is melt-kneaded to form a heterogeneous structure having a mesh-like interface weaker than the matrix strength so that the ball peels into pieces after dropping and drops. We also propose a method for manufacturing the ball for fried fireworks.
[0007]
[Action]
The firework firework ball skin of the present invention having the above-described structure uses a biodegradable resin that is completely decomposed or partially decomposed by microorganisms in the soil or in water (including seawater) as a matrix (main component). The pressure at the time of explosion because it forms a heterogeneous structure with a mesh-like interface weaker than the matrix strength by molding with compatible biodegradable resin or natural organic material such as wood powder or rice husk that does not dissolve By crushing at a mesh-like interface, it is cut into a few millimeters.
As described above, the conventional firework fireworks fall as a large piece of about several centimeters in size, so the drop impact level was large. Since it falls as a strip, it has a low drop impact and is safe.
Moreover, after being dropped on the ground, it is decomposed by microorganisms in the soil and water (including seawater), so that it can be quickly decomposed and the labor of recovery and incineration can be saved.
In addition, the method for producing a fried firework skin of the present invention can be molded by a general plastic production means such as injection molding, compression molding, sheet molding, etc., so that it is excellent in mass productivity and very efficiently fireworks. Can be manufactured.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The ball of fireworks for fireworks of the present invention has a size of about several millimeters, preferably 5 mm or less, and is required to be recovered and incinerated, so that there is no danger even if debris left after explosion falls on the ground. There is a feature in that there is no.
For this reason, in this invention, natural organic materials, such as biodegradable resin decomposed | disassembled by microorganisms in soil or water (including seawater), wood powder, and rice husk powder, are used as the raw material of the skin. Then, a combination of a biodegradable resin selected as a matrix (main constituent) forming a skin (endothelium) and a biodegradable resin incompatible with this or a natural organic material that does not dissolve as a secondary constituent Select and use as raw material for ball skin molding.
[0009]
The biodegradable resin used in the present invention includes a biodegradable resin as a matrix and an incompatible biodegradable resin, which are decomposed by the action of microorganisms generally present in soil and water. Known plastics having properties, polyvinyl alcohols, aliphatic polyesters, polycaprolactones, polysaccharides, modified starches, and the like are known. These biodegradable resins can be mixed with inorganic fillers and carbon materials such as calcium carbonate and talc (hydrous magnesium silicate Mg3Si4O10 (OH) 2) which do not damage the environment.
[0010]
As an example of a combination of a biodegradable resin as a matrix and an incompatible biodegradable resin, a combination of a water-soluble biodegradable resin and a water-insoluble biodegradable resin can be exemplified. Since these do not intermingle with each other, when mixed, a non-uniform structure having a so-called sea-island structure is formed, in which a small amount of components are scattered in an island shape among a large amount of components. And because it is a combination of biodegradable resins that are not compatible with each other, only the van der Waals force, which is an intermolecular force, acts on the boundary surface (interface) between the sea and the island, and each is connected by a strong covalent bond. It becomes a very weak binding state as compared with the component phase.
[0011]
In addition, as a natural organic material powder that is incompatible with the biodegradable resin as a matrix (not soluble), wood powder and rice husk powder obtained by pulverizing natural organic materials such as wood and rice husk with a stone mill and various mills are used. It can be illustrated. The kind of natural organic material used as the material is not particularly limited, and any organic organic material may be used as long as it does not damage the environment even if it falls on the ground as a fragment such as a plant or a crop. The particle size of these natural organic material powders is preferably 1 mm or less in view of moldability.
[0012]
The ratio of the matrix (main component) and the subsidiary component is 1 to 60% by weight when the natural organic material powder is used as the subsidiary component. This is because if the amount is 1% by weight or less, creation of an interface effective for fracture is not sufficient, and if it exceeds 60% by weight, it is difficult to smoothly produce a molding material, which is not preferable. When an incompatible biodegradable resin is used as the secondary component, the secondary component is 1 to 50% by weight. This is because if the amount is 1% by weight or less, the creation of an interface effective for destruction is not sufficient, and if it exceeds 50% by weight, it becomes a main component rather than a secondary component.
[0013]
Next, after melt-kneading this raw material, it shape | molds as a ball skin (endothelium). At the time of melt kneading, the matrix (main constituent component) and the subordinate constituent component are incompatible with each other, and thus form a non-uniform internal structure called a so-called sea-island structure. Since the adhesion strength at the interface between the constituent components is weaker than the matrix strength, when exploding and exploding, it breaks from the interface and breaks into pieces.
A method for molding by melt kneading is not particularly limited, and a general method can be used. For example, it is possible to apply a method in which, after heating in a screw-type extruder, kneader, Banbury mixer, or Henschel mixer, and melt-kneading, the granulated pellets are molded by injection molding, compression molding, sheet molding, or the like. Of course, after the dry blending of the matrix (main constituent component) and the sub constituent component, the ball skin (endothelium) may be directly formed by injection molding or compression molding.
[0014]
Further, a preferred shape configuration of the present invention will be described based on the drawings. FIG. 1 is a perspective view showing the form of a skin (endothelium) which is an embodiment of the present invention. The ball skin 1 has a material structure in which the matrix (main component) and the subcomponent are incompatible as described above, and has a non-uniform structure having a network interface weaker than the matrix strength. Then, it is formed by injection molding using a plurality of molds having two hemispherical portions.
The diameter of the ball skin 1 is determined in accordance with the standard according to its purpose and the amount of stars and crackers packed in the inside, such as cracked shells for lightning and small flowers and shells of cracked balls. . In addition, the wall thickness uses the characteristics of the fragment state obtained by the subcomponents mixed with the matrix used, the cracked state of the cracked skin and the type and amount of stars and crackers required for cracks and poka. Determined from the bursting state of the hulls required by.
The ball skin 1 is composed of two hemispheres, and a hole 2 for a conducting wire is opened at the center of the bottom of either hemisphere. In this case, the lead wire hole 2 may be easily formed later by drilling, or the lead wire hole 2 may be integrally formed at the time of molding.
Further, as shown in FIG. 2 (a), the edge of the mating surface of each hemisphere may be formed in an uneven shape, or the edge may be formed in a screw shape as shown in FIG. 2 (b). In this case, in addition to ensuring the positioning after the two hemispheres are joined together, the tape fixing step can be omitted.
Furthermore, in order to promote the fragmentation of the skin 1 at the time of explosion, a small groove 3 may be provided on the surface of the skin 1 as shown in FIG. Also good. Furthermore, not the continuous groove 3 but recesses may be formed at a predetermined interval. In order to form these grooves 3 or dents, ridges or protrusions may be formed on the inner surface of the molding die, or may be engraved with a sword after molding. .
Flying fireworks using the tan 1 (endothelium) having such a structure dramatically reduces the man-hours for production compared to the conventional tanned skin using laminated newspaper or hard paper press-molded endothelium. It is excellent in performance, and it is possible to easily form an edge shape, form a groove or a recess, and the like.
[0015]
【Example】
EXAMPLES Next, although an Example demonstrates this invention, this invention is not limited to this.
[0016]
[Example 1: Ball A]
50% by weight of beech pulverized to 100 mesh or less (0.152 mm or less) was mixed with “Corn Pole” manufactured by Nippon Corn Starch Co., Ltd., which is a starch-based biodegradable resin, and heated and kneaded with a pressure kneader. Next, the obtained kneaded material was pulverized into 2-3 mm square pellets by a pulverizer, and a hemispherical No. 3 ball size hemisphere shown in FIG. 1 was formed by injection molding. Two of these are referred to as a ball skin A.
[0017]
[Example 2: Ball skin B]
In the same manner as in Example 1, “Corn Pole” (manufactured by Nippon Corn Starch Co., Ltd., water-insoluble), which is a starch-based biodegradable resin, is combined with Nippon Synthetic Chemical Co., Ltd., which is a water-soluble biodegradable resin. A hemisphere for ball skin of the same size as shown in FIG. 1 was formed by injection molding in the same manner as in Example 1 except that 50% by weight of “Ecomati” manufactured by the present invention was mixed. Two of these are referred to as a ball skin B.
[0018]
[Example 3: Skin C]
As in Example 1, 25% by weight of rice husk powder ground to 115 mesh or less (0.125 mm or less) in “Corn Pole” manufactured by Nippon Corn Starch, a starch-based biodegradable resin, talc as an inorganic filler A hemisphere for the same size as shown in FIG. 1 was formed by injection molding in the same manner as in Example 1 except that 20% by weight and 3% by weight of carbon black as a carbon material were mixed. These two are combined to form a ball crust C.
[0019]
[Comparative Example 1: Ball D]
For comparison, a hemisphere for the same size as shown in FIG. 1 was obtained by injection molding in the same manner as in Example 1 except that only “Corn Pole” manufactured by Nippon Corn Starch, which is a starch-based biodegradable resin, was used. Was molded. Two pieces of these were combined to produce a ball skin D.
[0020]
[Comparative Example 2: Ball E]
As a comparison, the same size hemisphere for a ball skin was formed using a conventional paper ball skin. Two pieces of these were combined to produce a ball skin E.
[0021]
<Explosion test>
Explosives such as a split medicine, a lightning agent, and a star for producing a fireworks effect in the usual manner, using the ball skins A, B, and C as examples of the present invention and the ball skins D and E as comparative examples. The fireworks balls were struck, and these fireworks balls were placed in drums and exploded on the ground.
A part of the pieces of the ball skin collected from the drum can are shown in FIGS. The grid in the figure is 5 mm per side.
[0022]
"result"
As is apparent from FIGS. 4, 5, and 6, each of the skins A, B, and C, which are embodiments of the present invention, is fragmented by the pressure of the explosion, and all pieces are 5 mm. It was crushed below.
In contrast, as apparent from FIG. 7, the skin D made of the biodegradable resin alone remained as it was without breaking. In addition, as shown in FIG. 8, the conventional leather skin E, which is cracked, is cracked, but its fragments are as large as several centimeters. Efforts are required to cause harm and to collect scattered debris the next day.
In addition, as a result of flying these into the air by a normal method, the firework fireworks produced using the ball skins A, B, and C, which are examples of the present invention, are the conventional paper ball skins. It was a firework ball of the same size and color as the flying fireworks produced using E.
[0023]
【The invention's effect】
As described above, the groundwork for fireworks of the present invention is safe because it is fragmented at the time of explosion, and after being dropped on the ground, it is decomposed by microorganisms in the soil and water (including seawater). Therefore, the trouble of collecting and incinerating can be saved.
In addition, the method for producing the ball for flying fireworks of the present invention can be molded by general plastic production means such as injection molding, compression molding, sheet molding, etc., and its bonding edge, surface, inner surface, etc. Since it is easy to give various shapes to the surface, it is excellent in mass productivity and can produce a fireworks ball that is highly efficient.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a ball for flying fireworks according to the present invention.
FIGS. 2A and 2B are perspective views showing an aspect in which an edge portion of a bonding surface of a skin is formed in an uneven shape, and FIG. 2B is a perspective view showing an aspect in which an edge portion of the bonding surface is formed in a screw shape. .
FIG. 3 is a perspective view showing a mode in which fine grooves are formed on the surface of a ball skin.
FIG. 4 is an enlarged photograph of strips collected after detonating firework fireworks produced using the ball skin A produced in Example 1 of the present invention.
FIG. 5 is an enlarged photograph of strips collected after detonating firework fireworks produced using the ball skin B produced in Example 2 of the present invention.
FIG. 6 is an enlarged photograph of strips collected after detonating firework fireworks produced using the ball skin C produced in Example 3 of the present invention.
7 is an enlarged photograph of a strip collected after detonating firework fireworks produced using the ball skin D produced in Comparative Example 1. FIG.
8 is an enlarged photograph of a strip collected after detonation of a firework firework produced using the ball skin E produced in Comparative Example 2. FIG.

Claims (5)

By using a biodegradable resin as a matrix and melt-kneading one or more types of biodegradable resins that are incompatible with the resin so that the ball peels into pieces after dropping and drops. A ball for flying fireworks characterized by having a non-uniform structure having a mesh-like interface weaker than the matrix strength. By using a biodegradable resin as a matrix and melting and kneading 1 to 60% by weight of a natural organic material powder having a particle size of 1 mm or less, which is incompatible with the resin, the ball skin is stripped after being beaten. A ballet for flying fireworks characterized by having a non-uniform structure having a mesh-like interface weaker than the matrix strength so as to fall into a falling shape.   The ball for fried fireworks according to claim 1 or 2, wherein an inorganic filler and / or a carbon material is mixed.   The ball skin for flying fireworks according to any one of claims 1 to 3, wherein a depression or a groove is provided on a surface and / or an inner surface of the ball skin. A biodegradable resin is used as a matrix, and one or more types of biodegradable resin that is incompatible with the resin is 1 to 50% by weight, and / or one type of natural organic material powder that has an incompatible particle size of 1 mm or less. For fired fireworks characterized by having a non-uniform structure having a mesh-like interface weaker than the matrix strength so that the ball skin is shredded and dropped after being ground by melting and kneading 1 to 60% by weight . A method for producing a bean skin.

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