JPH0790109A - Synthetic resin pellet and its use - Google Patents

Abstract

PURPOSE:To obtain a synthetic resin pellet useful as a deodorant, a water- purifying agent, an antibacterial agent, and a freshness-reserving agent by pelletizing a synthetic resin compsn. contg. a maifan stone powder having a specified particle size in a high concn. CONSTITUTION:The title pellet contains 10-60wt.% maifan stone calcite powder having a particle size of 100 mesh or lower. A pref. synthetic resin is a crystalline one such as polystyrene. After a powder or pellet of the resin is kneaded and melted, the stone powder is mixed with the resulting resin melt. The resulting mixture is pelletized with a pelletizer. The stone powder is injected into the resin melt by forcing air into a container which contains the stone powder and has a pipe with an end inserted into the melt. The maifan stone is a calcareous ovolite.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin pellet containing barley stone in a high concentration useful as a deodorant, a water purifier, an antifungal agent and a freshness-retaining agent.

[0002]

2. Description of the Related Art Bakuhanishi itself is an ancient Chinese document, Vol.
As described in detail in (1), it is known as an ore having a medicinal effect. Calcareous ovo, calcite ovate
lite. It is described as "egg stone" and is called Mainf.
Also known as an Stone. This stone has a sweet odor, is warm, and is non-toxic, and when immersed in water, it turns into active mineral water, and if rice cooked with this water is taken for a long time, diuresis, stomach, and liver activity will occur. It is said to be effective in Even if this bourse stone itself is so effective, the stone itself is brittle and difficult to handle.

According to Japanese Unexamined Patent Publication No. 63-256656, a film or sheet is made of a material in which 0.1 to 5% by weight of barley stone having a diameter of 0.1 to 100 μm is mixed with a crystalline polymer. Alternatively, it is reported that a bag made of a sheet was filled with a malodorous gas such as trimethylamine, methyl mercaptan, and ammonia, and the malodor removing effect was measured. However, in reality, bakuhanishi is used as a part of the filler, and extrusion molding is performed to obtain a film thickness of 0.
Even if the film had a thickness of about 3 mm, when it was stretched, pinholes were generated, and the film itself had a somewhat rough surface, lacked transparency, and had extremely low commercial value.

Assuming that boiled stone is present on the surface as much as possible in view of the efficacy of boiled stone, the idea of naturally forming a film or sheet is born, and the above-mentioned concept is put together. It is, of course, true that there was no idea that the resin composition containing barley stone could be used in pellet form or as a molded product other than a film or sheet to exert the effect of barley stone.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a new pellet containing barley stone in a high concentration. Another object of the present invention is to provide a new form of use of the pellets as a deodorant, a water purifier, a fungicide, and a freshness-retaining agent.

A first aspect of the present invention relates to a synthetic resin pellet characterized by containing 10 to 60% by weight, preferably 30 to 50% by weight, of barley stone powder having a size of 100 mesh or less. The synthetic resin is preferably crystalline, because the gap between the crystals increases the chances of contact between barite and the outside. Examples of the crystalline synthetic resin include polyester such as polyethylene terephthalate, polycarbonate, polyamide, polypropylene, low-pressure polyethylene, polystyrene and the like. The grain size of barley stone is 10
It is 0 mesh or less, preferably 200 mesh or less, and particularly preferably 300 mesh or less.

The second aspect of the present invention relates to a deodorant comprising the above pellets.

The third aspect of the present invention relates to a water purifying agent comprising the above pellets.

The fourth aspect of the present invention relates to a fungicide comprising the pellets.

The fifth aspect of the present invention relates to a freshness-retaining agent comprising the pellets.

A sixth aspect of the present invention is to knead and melt the synthetic resin powder or pellets and simultaneously knead them with 100 mesh or less, preferably 200 mesh or less of bakuhanseki powder in an amount of 10 to 60% by weight with respect to the total resin content. Then, the present invention relates to a method for producing synthetic resin pellets, which comprises pelletizing with a pelletizer. It is preferable that the grain size of barley stone is smaller because a large amount of barley stone can be mixed in the molded product without damaging the molding machine.

The press-fitting of the barley stone is achieved by injecting the barite stone into the molten resin by press-fitting air into a container containing the barite stone connected to a pipe inserted in the molten resin.

[0013]

EXAMPLES In each of the following examples, polystyrene was used as a resin, and barley stone was 300 mesh or less, 50% by weight.
Was used and pelletized, but the present invention is not limited to this.

Example 1 (Effect as a deodorant) Three garlic mashed into a paste were placed in a plate and stored in a refrigerator. 5g of the pellets in the refrigerator
The odor in the refrigerator was checked 12 hours after and without. The test is a sensory test conducted by 20 monitors. As a result, in the case where the pellet of the present invention was present, all did not feel the garlic odor, whereas in the case where the pellet was not present, all felt the garlic odor strongly.

Example 2 (Freshness-keeping effect) As fresh fish, 3000 g of tuna meat was stored in a 200 ml refrigerator. The degree of discoloration was visually compared after cooling for 48 hours with and without a dish containing 10 g of the pellets. In comparison with the case where the pellet of the present invention is present, there is no discoloration at all,
Those without pellets showed considerable discoloration, and the difference was clear. In addition, as a result of a taste test by 20 monitors, about 80% of people reported that there was a difference in taste.

Example 3 (Water Purification Effect) Hot water was put into a domestic bath tub containing 500 g of the pellets, and a family of four bathed once every day for two weeks, and the middle-layer bath water was drawn out to form a corporation. We requested the inspection from the Saitama Environmental Inspection Research Association (3-5-1 Chuo, Warabi-shi). The results are shown in the table below.

[0017]

[Table 1] The test methods were all in accordance with the water supply test method. As a result, it is surprising that there is no abnormality in the odor, even though a terrible odor is usually generated, and the fact that Escherichia coli including general bacteria was not detected is completely surprising. Was that.

Example 4 (Antifungal Effect) Five pellets were placed on the center of the following agar medium in a petri dish, and one was not placed, and 1 ml of the following fungus-mixed spore solution was homogenized. And cultivated at 30 ° C. for 30 days.

Test medium: ASTM G21-70 Inorganic salt agar medium Mixed spores Aspergillus niger Penicillium citrinum Cladosporium herbarum criteria -... No mold growth on agar. + ... Only a few molds grow on the agar. ++ A certain amount of mold grows on the agar. ++++ A lot of mold grows on the agar. +++++ Mold is growing on the agar.
result

[Table 2]

[0020]

[Effect] Since the pellets of the present invention contain barley stone in a high concentration, they can be advantageously used for producing barley stone-containing molded articles by mixing with normal pellets not containing barley stone. The blending of barley stone may damage the screw of the molding machine remarkably by directly blending it into an injection molding machine or the like, but if this pellet is used, there is no such concern. Further, the pellets of the present invention can exert excellent effects as a deodorant, a water purifier, a freshness-retaining agent, an antifungal agent, etc., and after being used for a long time, they can be used many times by exposing to the sun and deformed. , Does not cause any alteration.

Claims (8)

[Claims] 1. Boiled stone powder 10 to 100 mesh or less
A synthetic resin pellet containing 60% by weight. 2. The synthetic resin pellet according to claim 1, wherein the synthetic resin is a crystalline synthetic resin. 3. The synthetic resin pellet according to claim 1 or 2, wherein the grain size of barley stone is 200 mesh or less. 4. A deodorant consisting of the pellet according to claim 1, 2 or 3. 5. A water purifying agent comprising the pellet according to claim 1, 2 or 3. 6. A mildew-proofing agent comprising the pellet according to claim 1, 2 or 3. 7. A freshness-retaining agent comprising the pellet according to claim 1, 2 or 3. 8. The synthetic resin powder or pellets are kneaded and melted, and at the same time, kneaded stone powder of 100 mesh or less is kneaded while being pressed into the resin in an amount of 10 to 60% by weight, and then pelletized by a pelletizer. To make synthetic resin pellets.