JP2004035779A - Plastic article having antibacterial, mildewproofing and biocontrolling functions and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plastic article having antibacterial function and mildewproofing function such as disinfecting and sterilizing action and exhibiting controlling function against organisms such as mites, slugs and snails. <P>SOLUTION: The plastic article having antibacterial function, mildewproofing function and controlling function against organisms contains powder of antibacterial metal such as copper, a copper alloy and zinc in a resin. The plastic article having antibacterial function, mildewproofing function and controlling function against organisms is produced by mixing a resin with powder of antibacterial metal such as copper, a copper alloy and zinc in combination with a dispersing agent, extruding the mixture with an extruder in the form of a stringy or thread-like resin containing the antibacterial metal powder and pelletizing the product by cutting the extrudate to a prescribed size. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a plastic product having a so-called antibacterial action such as sterilization and sterilization, an antifungal action, and a biological control action such as fleas, mites, slugs and snails, and a method for producing the same.
[0002]
Conventionally, there has been an idea that aluminum or other metal is mixed into a resin in order to make a color of a plastic product a metal color. However, for the purpose of imparting the so-called antibacterial action such as sterilization and sterilization and fungicidal action to plastic products, or the biological control action of fleas, mites, slugs and snails, resin, copper or copper alloy or zinc There has not been a plastic product molded by containing a metal powder having antibacterial properties as described above.
[0003]
As described above, metals having antibacterial properties, such as copper, copper alloys, and zinc, are known to have an antibacterial action, an antifungal action, and a control action against the above organisms. Therefore, various containers that are expected to exhibit antibacterial and antifungal effects, antibacterial trays, refrigerators, microwave ovens, dish dryers, hot water pots, water purifiers, and other kitchenware parts, as well as air conditioners and washing machines Machines, humidifier parts, various appliances and fixtures in toilets and toilets, appliances and fixtures in various public facilities touched by an unspecified number of people, stationery, various building materials, and exerts an action of controlling the above organisms For flower pots, rain gutters, hydroponic cultivation canals, shell buoy products, etc., which are desired to be made, these may be made of metals such as copper, copper alloys or zinc, but metals such as copper, copper alloys and zinc Is expensive, so there is a problem in terms of cost, it takes time to process, and because of the weight, etc., these products cannot actually be made of metals such as copper, copper alloys, and zinc. .
[0004]
[Problems to be solved by the invention]
An object of the present invention is to provide a plastic product exhibiting the above antibacterial action, fungicidal action, and further biological control action by adding a metal powder having an antibacterial property such as copper, a copper alloy or zinc to a resin. An object of the present invention is to provide a method for manufacturing the plastic product.
[0005]
[Means for Solving the Problems]
The plastic products of the present invention include ABS (acrylonitrile butadiene styrene), PE (polyethylene), PS (polystyrene), PA (polyamide), PMMA (polymethyl methacrylate), PP (polypropylene), POM (polyoxymethylene), and PVC (polyoxymethylene). Pellets formed by adding a resin selected from the group including polyvinyl chloride), AS (acrylstyrene), and PBT (polybutylene terephthalate) to a metal powder having an antibacterial property such as copper, a copper alloy or zinc; Or it consists of what was shape | molded from this pellet.
[0006]
The method for producing a plastic product of the present invention includes the steps of: adding a resin selected from the group including ABS, PE, PS, PA, PMMA, PP, POM, PVC, AS, and PBT to copper, a copper alloy, or zinc; The metal powder having antibacterial properties and the dispersant are mixed and thoroughly mixed with a mixing device, and then the mixture is extruded with an extruder to produce a fibrous or string-like antibacterial metal powder-containing resin, and the fibrous or The method includes cutting a string-shaped resin containing antibacterial metal powder into a predetermined size to form a pellet.
[0007]
【The invention's effect】
According to the present invention, sterilization, antibacterial action such as sterilization, antifungal action, and fleas and mites, slugs, plastic products that exhibit a very effective control action against pests such as snails, even if the Even if the shape is complicated, it can be easily and inexpensively processed and provided.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
The plastic products according to the present invention include ABS (acrylonitrile butadiene styrene), PE (polyethylene), PS (polystyrene), PA (polyamide) generally called nylon, PMMA (polymethyl methacrylate) generally called acrylic resin, PP (Polypropylene), POM (Polyoxymethylene), PVC (Polyvinyl Chloride), generally called PVC, AS (Acrylic Styrol), PBT (Polybutylene Terephthalate). 0.1 to about 80% by weight, preferably about 5 to about 10% by weight. The plastic product of the present invention also includes containers of various shapes and dimensions, antibacterial trays, refrigerators, microwave ovens, dish dryers, which are molded from the copper powder-containing pellets using a normal plastic product molding method. , Hot water heaters, water purifiers, and other kitchen utensils, air conditioners, washing machines, humidifiers, toilets and toilets, and various public facilities Fixtures, other sterilization, sterilization, stationery and other products that are desired to have antibacterial action such as mold prevention, various products such as building materials, hydroponic cultivation waterways, rain gutters, flowerpots, buoys with shell-proof action, It includes various products that are desired to exhibit a biological control action against harmful organisms such as marine products.
[0009]
The content of the copper powder is usually in a range of about 1 to about 80% by weight in consideration of an antibacterial action, a fungicidal action, a control action on living organisms, ease of molding, allowable brittleness of a product, workability, and the like. Although it is set, it has been confirmed that a sufficient antibacterial action, antifungal action, and biological control action can be obtained even with a content of about 0.1% by weight depending on the purpose of use and the state of use of the plastic product. In addition, when a plastic mixed with copper in the above range was tested for tensile strength and bending strength, it was confirmed that there was no inferiority to that of ordinary plastic containing no copper powder.
[0010]
As the copper powder to be mixed into the resin, various shapes such as so-called powder, granule, needle, short fiber, scale, and flake can be used. In the present specification, these are collectively referred to as “copper powder”. The size of the copper powder ranges from about 20 to about 100 μm, preferably about 30 to 45 μm. A part of the mixed copper powder is in a stable state on the surface of the molded plastic product (in a state where it does not easily peel off or fall off (for example, the shape of the copper powder is larger than the surface area such that the surface area is larger than the volume). It is desirable to be exposed in the form of an antibacterial agent, antifungal agent, and a sustained controlling effect on living organisms.
[0011]
FIG. 1 schematically shows a method for producing a plastic pellet containing copper powder as a component according to an embodiment of the present invention. In the figure, a resin selected from the group including the above-mentioned ABS, PE, PS, PA, PMMA, PP, POM, PVC, AS, and PBT, copper powder, and an appropriate amount of a dispersant are charged from the hopper 1. For example, after sufficiently mixing three kinds with a tumbler or a Henschel mixer, for example, a single-screw kneading extruder 2 forms a thread-like or cord-like copper powder-containing resin 3. The thread-like or string-like copper powder-containing resin 3 is cooled in a cooling water tank 4, and then the attached water is removed and dried, for example, by an air wiper 5, and supplied to a pelletizer 6. The pelletizer 6 cuts the thread-shaped or string-shaped copper powder-containing resin 3 into a predetermined size to form a pellet. The generated pellets are sent to, for example, a vibrating sieve 8 via a feeding path 7, where the size is selected, and copper powder-containing pellets having a predetermined size are generated. In addition to the above resins, for example, PC (polycarbonate) and PET (polyethylene terephthalate) were also used. However, since the molecular weight of PC and PET is extremely small, it is difficult to mix with copper powder, and it is difficult to uniformly mix copper powder. It is not unusable, but not very suitable, as a resin for producing the plastic products of the invention.
[0012]
The copper powder to be mixed with the resin includes not only powdery powders but also various shapes such as the above-mentioned granules, needles, short fibers, scales, and flakes. The size of the copper powder may be in the range of about 20 to about 100 μm, but is preferably in the range of about 30 to about 45 μm. The content of copper powder is usually in the range of about 1 to 80% by weight, preferably about 5 to about 10% by weight. It has been confirmed that the copper powder has an action and a control effect on organisms, and the content of copper powder should not be limited to the above range.
[0013]
Microscopically, there is some variation in the copper powder content of each of the produced pellets. However, if all the produced pellets are sufficiently blended to mold the above-mentioned various plastic products, A plastic product containing a substantially equal amount of copper powder is formed.
[0014]
A plastic container molded from resin pellets containing copper powder according to the present invention as a component, and a plastic container molded with ordinary resin containing no copper powder was left wet for 10 days in a hot and humid state. Molds grew in the plastic container containing no copper powder, but no mold grew in the plastic container molded from the pellets containing the copper powder of the present invention, and the desired antibacterial and antifungal effects were obtained. Was confirmed.
[0015]
In addition, for example, a flower pot molded from the resin pellet containing the copper powder of the present invention has a very effective control effect against slugs and snails. In addition, the plastic sheet molded from the pellets containing the copper powder of the present invention has an effect of controlling fleas and mites. And the effect of controlling insect pests such as mites. Further, the resin pellets containing the copper powder of the present invention are also used for molding stationery, various building materials, pipes, and the like, which are desired to exhibit the above-described antibacterial action, antifungal action, and control action against living organisms. can do. It was also found that the water pipe formed from the copper powder-containing pellet of the present invention has an action of removing chlorine contained in tap water in addition to the above-mentioned antibacterial action and antifungal action.
[0016]
In the above-described embodiment, an example in which copper powder is used as the metal to be mixed into the resin has been described. However, similar effects can be obtained by mixing copper alloy powder and zinc powder in addition to copper powder.
[0017]
The embodiments described above are given as typical examples, and it is apparent that those skilled in the art can make various modifications without departing from the principle and scope of the present invention and can implement equivalent products. It is. Therefore, it goes without saying that the present invention includes these modified examples and equivalent products.
[Brief description of the drawings]
FIG. 1 is a diagram schematically showing an example of an apparatus used for manufacturing a plastic product of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hopper 2 Kneading extruder 3 Thread-like or string-like resin containing copper powder 4 Cooling water tank 5 Air wiper 6 Pelletizer 7 Feeding path 8 Sieve

Claims (4)

A plastic product having an antibacterial, antifungal and biological control action, characterized in that a resin contains metal powder having antibacterial properties as a component. The plastic product according to claim 1, wherein one of copper powder, copper alloy powder, and zinc powder is used as the antibacterial metal powder. The plastic product according to claim 1, wherein a resin selected from the group consisting of ABS, PE, PS, PA, PMMA, PP, POM, PVC, AS, and PBT is used. After thoroughly mixing the resin, the antibacterial metal powder, and the dispersant, extruding the mixture with an extruder to produce a thread-like or string-like antibacterial metal powder-containing resin; Cutting the resin containing the antibacterial metal powder into a predetermined size to produce resin pellets containing the antibacterial metal powder, and producing a plastic product having an antibacterial, antifungal and biological control action.

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