JPH0647625B2 - Synthetic resin molding - Google Patents

Description

TECHNICAL FIELD The present invention relates to a synthetic resin molded article having a non-moisture permeable structure imparted with antibacterial properties by elution of Ag ⁺ ions.

(Prior Art and Its Problems) With the recent development of polymer chemistry, various synthetic resin products have been used in various fields in accordance with the useful properties of synthetic resins.

Among them, for example, shower curtains, synthetic leather,
Non-moisture permeable sheet among synthetic resin moldings such as building material mounting materials, furniture mounting materials, washbasins, bathtubs, bathtub fixtures, accessories for home appliances (audio boxes, TV stands, etc.), and resin moldings for optical devices. , Plate, and its processed products are moldy, odorous, corrosive, during storage and use due to the action of microorganisms.
This has caused problems such as performance deterioration and has become a problem.

Therefore, the present invention provides such a resin molded article with an antibacterial property that prevents bacteria from growing, so that the original characteristics of the resin molded article are maintained and exhibited.

(Means for Solving the Problems) The synthetic resin molding of the present invention comprises a powdery granular material of water-soluble glass containing monovalent Ag in the composition mixed and supported in a synthetic resin molding having a non-moisture permeable structure. By exposing at least the surface of the molded body that comes into contact with the liquid or gas, and dissolving the water-soluble glass by the liquid or gas with which the molded body comes into contact so that Ag ⁺ ions are eluted. An antibacterial synthetic resin molded product having a non-moisture permeable structure.

(Function) The water-soluble glass containing monovalent silver used in the present invention is to be used in the "antibacterial, deodorant, highly absorbent resin body" disclosed by the applicant in Japanese Patent Application No. 62-313806. Equivalent, one or more network-forming oxides of SiO ₂ , B ₂ O ₃ , P ₂ O ₅ and Na ₂ O, K ₂ O, CaO, MgO, Ba
The solid composition comprises a glass composition containing one or more network-modifying oxides of O and ZnO and one or two network intermediate oxides of Al ₂ O ₃ and TiO _2.
Monovalent Ag, for example, Ag ₂ O, in an amount of 0 parts by weight is 0.1 to 0.1 parts by weight.
It contains 20.0 parts by weight. The water-soluble glass, by the gelation phenomenon in water, the dissolution rate of the solid in water by changing the composition ratio of the intermediate oxide and the composition ratio of the network-forming oxide and network-modified oxide It is controlled so that a certain amount of Ag ⁺ ions are retained in the gel substance over time and gradually eluted into water. (Hereinafter, this water-soluble glass is referred to as "silver glass".) A synthetic resin molded body that carries mixedly so that this silver glass is exposed on the surface is a liquid (moisture) or ( Moisture) elutes the glass component, Ag
⁺ Ions gradually elute on the surface of the molded body in accordance with the dissolution of the glass and exert an antibacterial effect. The elution amount of monovalent Ag ⁺ which is effective for antibacterial properties can be controlled by the composition ratio of the network oxide in the silver glass.

(Example) Hereinafter, the Example of this invention is described.

First, the water-soluble glass (silver glass) containing monovalent Ag used in this example was SiO ₂ 40.0 mol%, B ₂ O ₃
A mixture of 50.0 mol%, Na ₂ O and 10.0 mol% 100
Monovalent Ag was added to 2.0 parts by weight in terms of Ag ₂ O based on parts by weight, and the mixture was uniformly mixed.
It is a powder of 200-mesh passage obtained by crushing a product prepared by melting at a temperature in the range of 0 to 1300 ° C. for 60 minutes and then rapidly cooling. This is, for example, the product of Kinki Pipe Giken Co., Ltd. manufactured by the applicant of the present invention, which is a trade name of Biosure SG.

Next, the following matters were examined with respect to a bathroom curtain in which the above-mentioned silver glass was mixed and carried by a vinyl chloride sheet made of the following resin composition.

Mold resistance test as a fungicide Examination of workability Examination of heat resistance Examination of sulfidation 1) Preparation of sample piece ○ Resin compounding 800 (PVC) 100.0 parts by weight CaCO ₃ 12.0〃 TMF-108UJ 4. 0 〃 P-5U 0.5 〃 A-71 0.5 〃 Antifungal agent (test agent) 0.25, 0.3, 0.5 parts by weight of each compounded ○ Seating condition Roll size 8 ″ × 20 ″ 18 × 20 RPM Kneading temperature and time 200 ℃, 5 minutes ○ Antifungal agent under test Isophthalonitrile-based imidazole-based compound Brom-based isothiazoline-based silver glass 2) Test method and results Mold resistance test table (JIS Z-2911) Cut a test piece of size 3 cm x 3 cm onto a JIS inorganic medium and spray inoculate the suspension of test bacteria (containing 1/10 Sabouraud's medium) prepared before the surface at room temperature, inoculate and cover. A 25 ° C fan In performs a culture, to observe the fungal growth in the sample in the passage of days, examined the fungus resistance.

* Test fungus Aspergillus niger Penicillium citrinum Cha
etonium glabosium Cladosporium Cladosporiodes
Rhizopus nigricans ＊ JIS medium NH ₄ NO ₃ 3.0 g, KH ₂ PO ₄ 1.0 g, MgSO ₄ 0.5 g, KCL 0.25 g, F
eSO ₄ 0.002 g, agar 18 g / water 1.000 m * 1/10 Sabouraud medium glucose 4.0 g, peptone 1.0 g, agar 2.5 / water 1.0
00m * Mold resistance display A: No growth of the test bacteria is observed on the test piece.

B: 〃 〃 Approved in 1/3 or less of the specimen.

C: 〃 〃 Approved in 1/3 to 2/3 of the specimen.

D: 〃 〃 Approved in the whole specimen.

The test results are shown in Tables 1 to 4.

Examination of workability Workability is observed by kneading the test pieces to 200 ° C for 5 minutes.

Examination of heat resistance The heat resistance time (minutes) in the 180 ° C gear-open treatment of the test pieces 1 to 8 is shown.

Examination of Sulfide Contamination Specimens are examined by the lead acetic acid test method.

3) Conclusions and discussions PVC products are used for bathroom curtains, so a compound that is less susceptible to sulfidic contamination was compounded. Each concentration of each antifungal agent was mixed with the compounding compound prepared from the sample piece at each concentration, and the results were examined and summarized according to the above items, and the results are shown in Table 4 below.

From this result, by adding about 0.3 parts by weight of silver glass to 100 parts by weight of the vinyl chloride resin component, an antifungal effect can be expected for a long time, and the processability is the same as that without the addition of the antifungal agent. However, regarding heat resistance and sulfide pollution, it has been found that it is sufficient to apply each of the results in consideration of the respective results.

From the above examination, the antibacterial property against the sheet, the plate and the processed product, which are the synthetic resin molded articles having the non-moisture permeable structure, is demonstrated.
With respect to the other synthetic resin molded products having the moisture impermeable structure of the embodiment, the effect corresponding to the embodiment is expected.

(Effects of the Invention) As described above, the non-moisture permeable structure of the antibacterial synthetic resin molded article of the present invention is a synthetic resin molded article showing a non-moisture permeable structure of powdery particles of water-soluble glass containing monovalent Ag. Ag ⁺ eluting from the silver glass, which is mixed and supported on the glass and is exposed at least on the surface of the molded body which is in contact with the liquid or gas.
Bacteria are killed on the surface of the molded body by the ions, so that the resin molded body can be provided with antibacterial properties. Therefore, the resin molded product has fungicidal and deodorant effects due to bacteria, and by adjusting the composition ratio of silver glass, it becomes a molded product that can fully exhibit the characteristics of synthetic resin suitable for the purpose of the molded product. It is possible to increase the number of applications and expand the applications.

Claims (1)

[Claims] 1. A surface of a powdery granular material of water-soluble glass containing monovalent Ag contained in a composition, which is mixed and supported on a synthetic resin molded article having a non-moisture permeable structure, and which contacts at least the liquid or gas of the molded article. Exposed to, while the liquid or gas in contact with the molded body, while melting the water-soluble glass,
An antibacterial synthetic resin molded product having a non-moisture permeable structure, characterized in that Ag ⁺ ions are eluted.