JP4509330B2 - Marble-patterned resin molded products for cosmetic containers - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a marble molded resin molded product for a cosmetic container , which is injection molded or blow molded.
[0002]
[Prior art]
Conventionally, a resin molded product obtained by kneading a paper sludge generated when producing recycled paper from waste paper as a raw material and a thermoplastic resin such as heat-melted PP (polypropylene) or PE (polyethylene) has been proposed. (Japanese Examined Patent Publication No. 61-10503).
[0003]
[Problems to be solved by the invention]
However, in the conventional resin molded product, since raw materials such as the paper sludge and PP must be kneaded at the time of molding, it is necessary to mix and measure the raw materials every time it is molded, which is complicated. . In addition, since a series of operations from kneading to molding must be performed, a considerably large space is required for the arrangement of the equipment for that purpose.
[0004]
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a marble-shaped resin molded product for a cosmetic container that does not need to be blended with raw materials each time it is molded.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the marble-patterned resin molded product for a cosmetic container of the present invention comprises an old paper defibrated in advance to an average diameter of more than 0.1 mm and 1 mm or less, and an average length of more than 2.5 mm and 10 mm or less. Injection molding or blowing using as raw materials pellets made of calcium carbonate and polyolefin resin, wherein the calcium carbonate is 10% by weight or more and less than 40% by weight, and the polyolefin resin is 10% by weight or more and less than 50% by weight. It is configured to be molded.
[0006]
That is, the marble-shaped resin molded product for cosmetic containers of the present invention comprises an old paper, calcium carbonate, and polyolefin resin that have been defibrated in advance to an average diameter of more than 0.1 mm to 1 mm and an average length of more than 2.5 mm to 10 mm. Since the calcium carbonate is 10% by weight or more and less than 40% by weight of the whole, and the polyolefin resin is 10% by weight or more and less than 50% by weight of the pellets as a raw material, injection molding or blow molding, It is not necessary to mix the raw materials every time it is molded. Also, pelletization and injection molding or blow molding can be separate processes, and it is not necessary to perform a series of steps from pelletization to injection molding or blow molding, and it is possible to arrange equipment for injection molding or blow molding. Does not require a large space.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described in detail.
[0008]
The marble-patterned resin molded product for a cosmetic container of the present invention comprises defibrated waste paper, calcium carbonate, and polyolefin resin, and the content of calcium carbonate is 10 wt% or more and less than 40 wt% of the whole. The content of the polyolefin resin is 10% by weight or more and less than 50% by weight of the whole. Such a marble-patterned resin molded product for a cosmetic container (hereinafter simply referred to as “plastic molded product for a cosmetic container”) is manufactured as follows.
[0009]
That is, first, the waste paper is fibrillated using a defibrator, a beater, or the like. The waste paper is preferably high-quality paper, but is not particularly limited, and may be waste paper such as newspapers and magazines. The size of what was disintegrated into fibers, from the viewpoint of securing strength of the cosmetic container for a resin molded product, the average diameter of 1mm hereinafter exceed 0.1 mm, 10 mm or more beyond the average length of 2.5mm Ru Oh below.
[0010]
Next, after mixing the defibrated waste paper with calcium carbonate and polyolefin resin liquid, the mixture is kneaded at a temperature of about 70 to 120 ° C. in a kneader or the like and then pelletized by a granulator such as an extrusion granulator. To do. In the pelletization, the content of calcium carbonate in the pellet is 10% by weight or more and less than 40% by weight, and the content of the polyolefin resin is 10% by weight or more and less than 50% by weight. Mix calcium carbonate and polyolefin resin solution. Examples of the polyolefin resin liquid include liquid polypropylene, low density polyethylene, and olefinic thermoplastic elastomer.
[0011]
Then, a necessary amount of the pellet is put into an injection machine and injection molded at a temperature of about 140 to 180 ° C. to produce a resin molded product for a cosmetic container such as a cosmetic container or a compact.
[0012]
As described above, according to the above-described embodiment, since the raw material of the resin molded product for a cosmetic container is a single type of pellet, it is not necessary to mix the raw material each time it is molded. In addition, since pelletization and injection molding are separate processes, it is not necessary to perform a series of steps from pelletization to injection molding, and a large space is not required for arrangement of equipment for injection molding.
[0013]
Furthermore, although the defibrated waste paper is bulky, the volume is reduced because it is pelletized as described above. As a result, it is possible to facilitate handling such as storage and transfer of the defibrated waste paper. Moreover, a pellet can be made and accumulated by the said pelletization, and the productivity of a pellet and the resin molded product for cosmetic containers can be improved.
[0014]
Next, examples will be described.
[0015]
[Example 1]
Waste paper of high quality paper, calcium carbonate, and liquid polypropylene were prepared. The waste paper was defibrated to have an average diameter of about 0.5 mm and an average length of about 5 mm, kneaded with the calcium carbonate and liquid polypropylene at 100 ° C., and pelletized. At the time of pelletization, the content of each of the above components in the pellet is as follows: the waste paper of fine paper is 28% by weight of the total dry weight, calcium carbonate is the total dry weight of 30% by weight, and the liquid polypropylene is the total Of 42% by weight. And the cosmetics container was manufactured by injection-molding at 160 degreeC by using the said pellet as a raw material.
[0016]
[Example 2]
In Example 1 above, the content of each component in the pellets was as follows: waste paper of fine paper was 31% by weight of the total dry weight, calcium carbonate was the total dry weight of 23% by weight, and liquid polypropylene was the total It was set to 46% by weight. Other than that was carried out similarly to the said Example 1, and manufactured the cosmetic container.
[0017]
[Example 3]
In Example 1 above, the content of each component in the pellets is as follows: the waste paper of fine paper is 33% by weight of the total dry weight, calcium carbonate is the total dry weight of 18% by weight, and the liquid polypropylene is the total It was set to 49% by weight. Other than that was carried out similarly to the said Example 1, and manufactured the cosmetic container.
[0018]
The cosmetic containers of Examples 1 to 3 had a marble appearance and a warm feel. Further, the cosmetic container can be handled as burning garbage, and could actually be easily burned. Furthermore, even if the cosmetic container is burned, no toxic gas is generated and environmental problems can be improved. In addition, when a pigment was added during injection molding, it could be colored. And it had the intensity | strength which can be used as a cosmetics container.
[0019]
In the above-described embodiments and examples, the resin molded product for a cosmetic container is obtained by injection molding. However, it may be obtained by blow molding, and in this case, the same actions and effects are achieved.
[0020]
【The invention's effect】
As described above, according to the resin molded product for a cosmetic container of the present invention, waste paper, calcium carbonate, and polyolefin that have been defibrated in advance to an average diameter exceeding 0.1 mm and not exceeding 1 mm, and an average length exceeding 2.5 mm and not exceeding 10 mm. The resin is formed by injection molding or blow molding using pellets containing 10% by weight or more and less than 40% by weight of the total calcium carbonate and 10% by weight or more and less than 50% by weight of the total polyolefin resin. Therefore, it is not necessary to mix the raw materials every time it is molded. Also, pelletization and injection molding or blow molding can be separate processes, and it is not necessary to carry out a series of processes from pelletization to injection molding or blow molding, and it is possible to arrange equipment for injection molding or blow molding. Does not require a large space.

Claims (1)

It consists of waste paper, calcium carbonate and polyolefin resin that have been defibrated in advance to an average diameter of more than 0.1 mm and less than 1 mm, and an average length of more than 2.5 mm and less than 10 mm. A marble-shaped resin molded product for a cosmetic container, which is formed by injection molding or blow molding using pellets in which the polyolefin resin is 10% by weight or more and less than 50% by weight of the whole.