KR20020063468A - Manufacture methode of antibacterial toy-block - Google Patents

Abstract

PURPOSE: Provided is a production process of antibacterial toy blocks which includes an inorganic antibacterial agent in resins and injection-molds at optimal temperature so that it improves antibacterial effect. CONSTITUTION: The production process of the antibacterial toy blocks comprises the steps of: (i) injecting 100wt% of one material among thermoplastic elastomer(TPE), acrylonitrile butadiene styrene(ABS) or polycarbonate(PC) into an injector and injecting 0.1-3.0wt% of inorganic bacterial agent into the injector to mix them; and (ii) injection-molding the mixed composition at 150-290deg.C in an appropriate block type wherein the temperature is different as materials like 160-180deg.C for ABS, 250-290deg.C for PC and 150-200deg.C for TPE.

Description

Manufacture methode of antibacterial toy-block

The present invention relates to a toy block having an antimicrobial function, and more particularly, to the antimicrobial and safety, that is, impact strength reinforcement and reliability of the product by including an antibacterial material in the manufacture of plastics used as a material of the toy block, such as infants and children It relates to a method of manufacturing a toy block to improve the.

In general, thermoplastics, which are raw materials of plastics, are known to be able to provide nutrients for microorganisms to inhabit bacteria.

As the use of these plastics is gradually expanded and applied to electronic products and household goods used in the surroundings of human life, plastic products exposed to a humid atmosphere can be a habitat for various germs. The presence of moisture, such as sweat, not only in the hands but also in the human body for the infection of the human body by bacteria living on the surface of the plastic product, especially in infants, rather than due to the degradation of the product. There is a problem that causes the disease or have a fatal effect on health through the fungus.

In particular, in the case of the infant toy block mainly made of plastic is used in direct contact with the skin of the infant, such infant block products are particularly harmful to the human body due to the bacteria on the surface of the plastic as described above The problem arises.

On the other hand, in the prior art for solving the bacteria in the plastics in the case of preparing an antimicrobial bucket by gel coating method by adding 1.0 to 3.0% by weight of inorganic antibacterial material to the fiber reinforced polymer (FRP) to reinforce the impact strength Although a method of coating the surface of the product with a thin layer has been used, this method requires the addition of a coating process during the manufacturing process and the antimicrobial effect is lost when the surface coating layer is worn or peeled off due to long use of the finished product. The use of reinforcing fibers (glass fiber) has a problem that is difficult to apply to baby products. Products such as toys manufactured by adding antibacterial materials to plastics, PVC, etc. may be adversely affected by not only infants but also adults by plasticizers DOP (di-octyl-phthalate plasticizers) used to give flexibility.

The present invention has been proposed to solve the problems shown in the prior art, the object of the present invention is to provide a method of manufacturing an antimicrobial toy block that can protect the user and the product from various bacteria and the production process is also simple and productivity can be improved. have.

In addition, another object of the present invention is to improve the impact strength of the manufactured toy block to improve the safety and reliability of the product.

1 is an injection molding manufacturing process of the toy block product according to an embodiment of the present invention.

Toy block manufacturing process of the present invention for achieving the above object,

(1) any one of rubber [TPE (Thermoplastic Elastomer)] or thermoplastic resin [ABS (Acrylon-itrile Butadiene Styrene), PC (Polycarbonate)] and inorganic antibacterial material Cu-, Zn-, Ag-Zeolite, Ag-Ca phosphate, Ag-Zn-phosphate ceramic (manufactured by Daesung Ceramics, Korea Fine Ceramics, Biomix Co., etc.), Ag-based APASIL 903AW (HAN YANG SYNTHESIS CO. specific gravity: about 3.3) 0.1 to 3% by weight, elvan Manufactured by Hwaseong Mining Co., Ltd.) mixing 1 to 5% by weight of the mixing ratio, or mixing the inorganic antibacterial material to the injection machine;

(2) injection molding a block of a predetermined shape at a temperature of 160 ~ 180C ℃ for ABS resin, 250 ~ 290 ℃ for PC resin, 150 ~ 200 ℃ for TPE of the mixed composition; Characterized in that it comprises a.

In this case, the antimicrobial effect and internal homogeneity of the product may be improved due to the fine inorganic antibacterial material mixed directly after being added to the resin material, and the impact strength due to the dispersion of the uniform fine antimicrobial material may be improved. It plays a role in mitigating the toxicity present in plastics.

As a result, it is possible to manufacture environmentally friendly toy block products, which gives an advantage in improving the safety and reliability of the product.

And to date it is possible to protect the human body from the toxic plasticizer DOP by producing a baby toy and toys made of PVC through the composition of the present invention.

The block manufacturing process of the present invention having the technical matters described above will be described in more detail with reference to the following examples.

First, the manufacturing process of the toy block product of the present invention will be described with reference to FIG. 1.

When using ABS thermoplastic resin, 100% by weight of ABS resin and 0.1-3.0% by weight of inorganic antibacterial material were injected into the injection machine, respectively, to form a mixed composition. The particle size of the inorganic antibacterial material used at this time is 0.05 ~ 7㎛.

If the content of the inorganic antibacterial material injected into the injection molding machine exceeds 3.0% by weight, the impact strength may be reduced, and when the content of the inorganic antibacterial material is less than 0.1% by weight, the antimicrobial effect may be reduced.

On the other hand, the addition of the inorganic antibacterial material was also produced by modifying the surface with a silane-based couping agent in order to reduce the pore generation that can occur at the interface to improve the impact strength decrease.

Then, the mixed composition is injection molded at a temperature of 160 to 180 ° C. and molded into a desired block shape, and when such a prototype is made, an antimicrobial toy block product according to the present invention is completed by forming a final finished product through a subsequent inspection step. Will be.

If the injection molding temperature is 160 ° C. or less, the fluidity of the resin decreases and the torque of the injection machine rises, and the injection machine is hardly applied or injection is difficult.

If the temperature is higher than 180 ° C, carbonization of the resin may occur.

As a result of the antimicrobial experiment on the finished antimicrobial LEGO block products, the added material had an "+" ion property and showed an antimicrobial effect against "-" ions.

In the case of infants, in order to lower the antibacterial effect, the addition rate of antimicrobial material was drastically lowered to have the same ratio of antibacterial activity in E. coli 50%, Staphylococcus aureus, mold, resistant yellow Staphylococcus aureus and Bacillus subtilis. The product was made to be over 65%.

At this time, the characteristics of the impact strength may be improved as the amount of the antimicrobial agent added is reduced.

Therefore, it can be seen that combined with the antimicrobial effect on various bacteria, the impact strength is improved due to the addition of fine antimicrobial powder.

In the case of applying the toy block composition to which antimicrobial properties are applied, it can be seen that the product can be used not only in various LEGO block storage boxes used in places where high value-added products can be created and bacteria can be stored or remain. .

The composition of the block composition according to the present invention can be applied in various forms, and hereinafter, several experimental and comparative examples will be described.

Impact and antibacterial effect according to this preferred experimental example can be confirmed through [Table 1] and [Table 2].

Experimental Example 1

100% by weight of ABS resin (Cheil Industries, Kumho Petrochemical Co., Ltd.) was used for the 1st Hopper injector to inject a certain amount of raw material into the injection machine, and 2.5% by weight of Ag-based ceramic having a particle size of 2.0 µm was used for the 2nd Hopper. Raw materials were injected into the injection molding machine, and an injection molded product was prepared immediately after mixing at the maximum cylinder temperature of 170 ° C.

Specimens for measuring impact strength (Notched, 3.2mm) and specimens 10 cm long and 10 cm long were prepared for antimicrobial measurements, and their mechanical and thermal properties and antimicrobial properties were evaluated.

Comparative Example 1

100% by weight of ABS resin (Cheil Industries, Kumho Petrochemical Co., Ltd.) was prepared in the same manner as in Experimental Example 1 to evaluate the impact strength and antibacterial properties.

Experimental Example 2

100% by weight of PC resin (BAYER, manufactured by Samyang Co., Ltd.) and 2.5% by weight of Ag-based ceramic having a particle size of 2.0 μm were injected into the injection molding machine, and an injection molded product was prepared after mixing directly at the injection cylinder maximum cylinder temperature of 280 ° C.

Specimens for measuring impact strength (Notched, 3.2mm) and specimens 10 cm long and 10 cm long were prepared for antimicrobial measurements, and their mechanical and thermal properties and antimicrobial properties were evaluated.

Comparative Example 2

100% by weight of the PC resin (BAYER, Samyang Co., Ltd.) without the antibacterial material was mixed in the same manner as in Experimental Example 2 to prepare a specimen to evaluate the impact strength (Notched, 3.2mm), antibacterial properties.

Experimental Example 3

100% by weight of TPE resin (manufactured by Mitsubishi Chemical Co., Ltd.) and 2.5% by weight of Ag-based ceramic having a particle size of 2.0 μm were allowed to be injected into the injection machine, and an injection molded product was prepared immediately after mixing at the maximum cylinder temperature of 160 ° C.

For the antibacterial measurement, specimens 10 cm long and 10 cm long were prepared, and then their antimicrobial properties were evaluated.

Experimental Example 4

100% by weight of ABS resin (HM-0560, Cheil Industries) and 0.1% by weight of Ag-based ceramics having a particle size of 2.0 μm can be injected into the injection machine. (Notched, 3.2mm), antimicrobial properties were evaluated.

Experimental Example 5

100% by weight of ABS resin (HM-0560, Cheil Industries) and 0.5% by weight of Ag-based ceramics having a particle size of 2.0 μm can be injected into the injection machine. (Notched, 3.2mm), antimicrobial properties were evaluated.

Experimental Example 6

100% by weight of ABS resin (HM-0560, Cheil Industries) and 3.0% by weight of Ag-based ceramics having a particle size of 2.0 μm can be injected into the injection machine. (Notched, 3.2mm), antimicrobial properties were evaluated.

Experimental Example 7

100% by weight of ABS resin (HM-0560, Cheil Industries) and 10% by weight of Ag-based ceramics with a particle size of 2.0 μm can be injected into the injection machine. (Notched, 3.2mm), antimicrobial properties were evaluated.

Experimental Example 8

100% by weight of ABS resin (HM-0560, Cheil Industries) and 30% by weight of Ag-based ceramics with a particle size of 2.0 μm can be injected into the injection machine. (Notched, 3.2mm), antimicrobial properties were evaluated.

Experimental Example 9

100% by weight of ABS resin (HM-0560, Cheil Industries) and 2.5% by weight of Ag-based ceramics having a particle size of 1.0 μm can be injected into the injection machine. (Notched, 3.2mm), antimicrobial properties were evaluated.

Experimental Example 10

100% by weight of ABS resin (HM-0560, Cheil Industries), 2.5% by weight of Ag-based ceramics having a particle size of 1.0 μm, and 0.1% by weight of silane-based couping agent were allowed to inject the raw materials into the injection machine. The specimen was prepared by the method and the impact strength (Notched, 3.2mm) was evaluated.

As shown in [Table 1] it can be seen that the antimicrobial material applied in the present invention brings not only an antimicrobial effect but also an impact strength improvement. This is a new fact that has not been revealed so far.

In addition, it was found that the impact strength was lowered when the antibacterial material content was excessively used. The addition of the antimicrobial material showed the most excellent impact strength at 0.5% by weight, and the impact strength increased as the particle size decreased. It was.

In other words, the finer the particle size, the more the surface area is increased, and the impact strength is improved. In addition, when the surface was modified with a silane couping agent, the impact strength was improved.

In addition, the antimicrobial experiments were carried out for the compositions of 1-3 in comparison with Experimental Example 1-9, and the results are shown in the following [Table 2]. And by changing the addition ratio of the inorganic antibacterial material as in the experimental example and the comparative example was prepared specimens and carried out antibacterial measurement.

According to the test results, the specimens to which the present invention was applied showed that the antibacterial effect was significantly greater than that of bacteria, and in addition to the applied experiments, similar antimicrobial effects were found in resistant yellow grapes and Pseudomonas aeruginosa. As the amount of added antimicrobial material increased, the antimicrobial effect was found to be excellent.

In this experiment, the surface area of the specimen was 50 cm2, and the bacterial solution was incubated at 25 ° C for 24 hours, and then the number of bacteria was measured (150 times / minute). The method of shake flask (Shake Flask) method and E. coli were measured. Escherichia Coli ATCC25922 was used.

The present invention exhibiting such antimicrobial properties, the product produced by mixing a finer antimicrobial material compared to the existing anti-bacterial treatment product, because the antimicrobial material is present in the interior, the antimicrobial effect can appear permanently, as well as toy block products In addition, by applying antimicrobial functions to products such as storage boxes, plastic toys, such as automobiles, robots, etc., it is suitable for application to infant or child protection products.

The present invention as described above, by containing an inorganic antibacterial material in the resins as the main material during the manufacturing process of the toy block products and injection molding at the optimum temperature state to improve the antibacterial effect, the internal reformability is improved and the impact The strength is also shown to be improved.

Claims (1)

(1) 100% by weight of at least one of rubber [TPE (Thermoplastic Elastomer)] or thermoplastic resin [ABS (Acry-lonitrile Butadiene Styrene), PC (Poly cabonate)] is injected into the injection machine, and at the same time 0.1 to 3.0 A mixing step of injecting and mixing the inorganic antibacterial material measured by weight% into the injection machine; (2) injection molding the mixed composition into a predetermined block form at a temperature of 150 to 290 ° C (but ABS is 160 to 180 ° C, PC is 250 to 290 ° C, and TPE is 150 to 200 ° C); Method for producing an antimicrobial toy block comprising a.