JPH0428544Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Industrial Application Field] The present invention relates to a food molding device for rice balls, sushi, confectionery, ice, etc., and particularly relates to a sterile food molding device that can semi-permanently maintain the surface inside the food molding device in a sterile state. . [Prior Art] Conventional food molding machines for rice balls, sushi, confectionery, ice, etc. are usually made by extruding thermoplastic resin into sheets using an extruder and then secondary molding the resulting sheets. There is. Although the food molding machine made from this thermoplastic resin sheet has passed the PL standard, it does not have antibacterial properties, so there is a possibility that the food molding machine may be contaminated by bacteria during storage.
When using this food molding device for hygiene control purposes, it is necessary to thoroughly clean and sterilize the food molding device beforehand. In addition, as plastic processing technology advances, plastics that are constantly sterilized have been developed, and recently it has become possible to mix them into plastics (resins, films, and sheets) or apply them to their surfaces. Therefore, many antibacterial agents, antifungal agents, bactericidal agents, etc. that exhibit these effects have been developed, and some of them are now on the market. [Problems to be solved by the invention] However, food molding machines that utilize plastic, which has antibacterial and sterilizing effects by mixing antibacterial agents into the plastic or coating the surface of the plastic, do not, for example, It is a leaching type, and since the antibacterial properties are exerted by the antibacterial agents etc. eluted from these plastics, there is a risk that the taste of foods etc. may change. Also, in the processing of plastic
At temperatures above 250°C, conventional antibacterial agents, especially organic ones, degrade and lose their antibacterial effect. Furthermore, in order to obtain a predetermined antibacterial and sterilizing effect, a considerable amount, for example, must be used relative to the weight of the plastic. Although it is necessary to add more than 2.5%,
When such a large number of antibacterial agents are used, the inherent physical properties of plastics are impaired. That is, transparency, slip properties, heat seal strength, air permeability, etc. are affected, and problems arise in processability. Because of the above-mentioned problems, food molding machines that utilize plastic as a material in which antibacterial agents are mixed into the plastic or coated on the surface are rarely used. For this reason, currently each food manufacturer or first food restaurant, etc.
In order to maintain the sanitary conditions of first food such as rice balls and sushi, we are forced to invest a large amount of money, and we are making every effort to ensure the best possible results, such as improving processing machinery and installing sterile rooms. As part of this, large investments are being made to clean and sterilize the food molding machines that directly produce these first foods. Therefore, the present invention was developed in view of the above circumstances, and it is possible to exhibit antibacterial properties without elution of antibacterial agents, etc., and to maintain the amount of antibacterial components added without decomposing even at the temperatures required for plastic processing. To provide a sterile food molding device that requires less water, maintains antibacterial properties for a long time, and is easy to process. [Means for Solving the Problems] In order to solve the above-mentioned problems, the aseptic food molding machine of the present invention has at least the surface of the molding machine mainly composed of resin and antibacterial zeolite. The antibacterial zeolite is 0.1 to 5
It is made of antibacterial material within the range of % by weight. [Function] According to the above configuration, since at least the surface of the molding device is made of an antibacterial material containing antibacterial zeolite, the molding device is adhered to the surface of the molding device by ions having a bactericidal action in the antibacterial zeolite. It can kill microorganisms and keep the surface of the molding device sterile. [Example] Hereinafter, an example of the present invention will be described in detail based on the drawings. Figure 1 is a perspective view of the aseptic food molding device of the present invention;
FIG. 2 is a partial sectional view taken along the - line in FIG. 1. In both figures, 1 indicates a sterile food molding machine for rice balls (hereinafter simply referred to as a sterile molding machine),
The aseptic molding device 1 includes a container body 2 and a container body 2.
and a press lid 3 having approximately the same shape. The container body 2 is made of an antibacterial material containing antibacterial zeolite, and this antibacterial material is molded into two triangular rice ball shapes.
A round hole 4 is bored in the bottom surface 2a. The wall thickness of this container body 2 is slightly thick so as to have sufficient strength. As shown in FIG. 2, the antibacterial material of the container body 2 mainly consists of a resin 5 and an antibacterial zeolite 6, and the antibacterial zeolite 6 is in the range of 0.1 to 5% by weight based on the total weight of the resin 5. be. This resin 5 can be mixed with the antibacterial zeolite 6, and has characteristics required as a molding device for foods such as rice balls, such as being able to withstand a certain degree of low or high temperatures and having heat retention properties. Any material may be used as long as it has a certain degree of rigidity, does not give off an odor to food, is water resistant, and is non-toxic. The resin 5 is, for example, polystyrene, polyethylene, polypropylene, vinyl chloride, ABS resin,
Nylon, polyester, polyvinylidene chloride,
Polyamide, polyacetal, polyvinyl alcohol, polycarbonate, acrylic resin, fluororesin, polyurethane elastomer, polyester elastomer, phenolic resin, urea resin,
Mention may be made of thermoplastic or thermosetting resins such as melamine resins, unsaturated polyester resins, epoxy resins, urethane resins, rayon, cupra, acetate, triacetate, vinylidene, natural and synthetic rubbers. Among these, high-density polyethylene (HDPE),
Low density polyethylene (LDPE) is the most suitable. The antibacterial zeolite 6 replaces some or all of the ion-exchangeable ions of natural zeolite or synthetic zeolite with antibacterial metal ions, such as
It is sufficient if silver, copper, zinc, etc. are substituted (see JP-A-60-181002). That is, zeolites are generally aluminosilicates with a three-dimensional skeleton structure, and the general formula is
It is expressed as XM ² /n0・A1 ₂ 0 ₃・YSi0 ₂・ZH ₂ 0.
Here, M represents an ion exchangeable ion, which is usually a monovalent or divalent metal ion, such as sodium, potassium, magnesium, iron, etc., n is the valence of the metal ion, and X is a metal oxide. Y is the coefficient of silica, and Z is the number of crystal water molecules. Such a general formula XM ² /n0・
The ion exchange capacity of zeolite expressed as A1 ₂ 0 ₃・YSi0 ₂・ZH ₂ 0 is 2.6 meq/g to 11.5 meq/g
It is. Therefore, the antibacterial zeolite 6 converts these ion-exchangeable ions into antibacterial metal ions,
For example, silver, copper, zinc, etc. are substituted. From the viewpoint of antibacterial properties, the antibacterial zeolite 6 desirably contains about 0.1 to 15% by weight of these antibacterial metal ions in the zeolite (indicated by weight% on a dry basis at 110°C). The antibacterial zeolite 6 may also be a natural zeolite or a synthetic zeolite in which some or all of the ion-exchangeable ions are replaced with ammonium ions and antibacterial metal ions.
(See "Antibacterial Zeolite" filed on December 4, 1988, claiming priority under Article 42-2, Paragraph 1 of the Patent Law in Japanese Patent Application No. 1988-290144). The reason for adding ammonium ions in this way is to effectively prevent discoloration of antibacterial zeolite 6, and the ammonium ions in antibacterial zeolite 6 are 0.5 to 2.0%.
It is preferable to have the weight percentage within the range. Furthermore, the resin 5
From the viewpoint of substantially preventing discoloration of the resin 5, it is preferable that the content of the antibacterial zeolite 6 containing ammonium ions is 0.1 to 3.0% with respect to the resin 5. The antibacterial properties, sustainability of antibacterial activity, heat resistance, and safety of these two types of antibacterial zeolite 6 are described in detail in these publications or application examples. In other words, the antibacterial properties have been reconfirmed through antibacterial tests as described below, and the sustainability of the antibacterial properties has been confirmed by using antibacterial zeolite with an inner diameter of 22 mm.
Fill a glass column with a diameter of 100 mm to a volume of 10 ml, and fill the column with 25 to 30 ml of tap water.
The antibacterial zeolite still retains its antibacterial activity even after 5,000 water passes through it at a flow rate of ml/min, and its antibacterial activity can be said to last semi-permanently. In addition, it can withstand heat up to 550℃, and has passed antibacterial metal elution tests for safety. The antibacterial material of the container body 2 is mainly composed of thermoplastic resin 5' and antibacterial zeolite 6, as shown in FIG. It may be a multilayer sheet 9 in which at least one thermoplastic resin sheet 8 is fused or adhered to a sheet 7 having a content of 0.03 mm to 0.1 mm and a thickness of 0.03 mm to 0.1 mm. Two triangular rice ball-shaped container bodies 2 are molded with the sheet 7 containing the antibacterial zeolite 6 of the multilayer sheet 9 inside. The reason why the multilayer sheet 9 is used in this manner is to impart antibacterial properties to the inner surface of the container body 2 and to reduce the amount of antibacterial zeolite 6 used to reduce costs. This thermoplastic resin 5' is a resin exemplified as the resin 5 excluding the thermosetting resin, such as polystyrene, polyethylene, polypropylene,
ABS resin, etc. Like the container body 2, the pusher lid 3 is made of an antibacterial material containing antibacterial zeolite 6, and its shape is shaped like two triangular rice balls, almost the same as the container body 2. A collar 4 is provided on the upper edge of the opening of the press lid 3. Since the rest of the configuration of the push lid 3 is the same as that of the container body 2, the explanation thereof will be omitted. Next, the usage state of the aseptic molding device 1 having the above structure will be shown. First, the container body 2 of the stored aseptic molding device 1 is taken out, and rice is poured into the container body 2 up to the upper edge of the opening. Next, take out the lid 3 that is kept with your favorite items such as umeboshi and cod roe in the middle of the rice, place the lid 3 on the container body 2 containing the rice, and place it on the upper edge of the opening of the container body 2. Press until the flange 4 of the presser lid 3 touches it. At this time, the container body 2 and the lid 3 of the aseptic molding device 1 are stored.
Since the surface of the
If there is no dirt due to dust or the like, the surface of the aseptic molding device 1 will be kept in a sterile state, so there is no need to clean or sterilize the aseptic molding device 1, and it will remain sterile as is. A molder 1 can be used. In addition, the container body 2 and the lid 3
has heat retention properties. In particular, these container bodies 2
If the lid 3 is made of the foam 11, very high heat retention and antibacterial properties can be obtained at the same time. FIG. 4 shows another embodiment of the aseptic molding device 1 of the present invention, which differs only in shape, and other configurations and functions are the same as those in the embodiment shown in FIGS. 1 to 3, so their explanation will be omitted. . Next, the aseptic molding device 1 of the present invention is tested for antibacterial activity against Escherichia coli, Staphylococcus aureus, Salmonella enterica, and Vibrio parahaemolyticus. The test method is shown below. 1 Test strain Escherichia co1i IF0 3301 (Escherichia coli) Staphy1ococcus aureus ATCC 6538P (Staphylococcus aureus) Sa1mone11a typhimurium (laboratory isolate) (Salmonella enterica) Vibrio parahaemo1yticus IF0 12711 (Vibrio parahaemolyticus) 2 Bacterial count measurement medium Escherichia coli, Staphylococcus aureus, For salmonella...
Ordinary agar medium with 0.2% meat extract For Vibrio parahaemolyticus... Contains 3% salt, ordinary agar medium with 0.2% meat extract 3 Preparation of bacterial solution Escherichia coli, Staphylococcus aureus, Salmonella; After culturing overnight at 37℃ in ordinary bouillon medium,
Using sterile physiological saline, the number of bacteria per ml
It was prepared so that it would be ¹⁰⁴⁵ pieces. Vibrio parahaemolyticus: After culturing overnight at 37°C in a normal bouillon medium containing 3% salt, the number of bacteria was adjusted to ¹⁰⁴⁵ per ml using sterilized 3% salt water. 4 Test operation A sample piece of the example (4.8cm
x 4.8cm) and sample piece of comparative example (4.8cm x 4.8cm)
A fixed amount of the bacterial solution was sprayed onto one side of the cell and stored at 37°C.
0 (immediately after spraying), 24 and 48 hours after storage start
Survival bacteria on the sample pieces were washed out using SCDLP liquid medium (Daigo Nutrient Chemical), and the number of viable bacteria was measured using the washout solution using a pour plate culture method (37°C for 2 days) using a bacterial count measurement medium. This was converted into the number of viable bacteria per sample piece. In addition, the same amount of bacterial solution as that sprayed on the test piece was dispensed into a shear dish, stored at 37°C, and the number of viable bacteria was measured immediately, 24, and 48 hours later. Example 1 A sample piece was prepared by mixing high-density polyethylene (HDPE) with 1.0% by weight of antibacterial zeolite. Comparative Example 1 A sample piece was made only from high-density polyethylene (HDPE). The test results are shown in Attached Table-1. Example 2 A sample piece was made of low density polyethylene (LDPE) mixed with 0.7% by weight of antibacterial zeolite. Comparative Example 2 A sample piece was made only from low-density polyethylene (LDPE). The test results are shown in Attached Table-2. [Effects of the invention] As detailed above, the aseptic food molding machine of the present invention has at least the surface of the molding machine mainly composed of resin and antibacterial zeolite, and the antibacterial zeolite is 0.1% of the total weight of the resin. Since it is made of an antibacterial material in the range of ~5% by weight, the ions in the antibacterial zeolite that have a bactericidal effect kill the microorganisms attached to the surface of the molding device, making the surface of the molding device sterile. can be kept. Therefore, although the configuration is simple, even if the molding device is stored for a long period of time, the molding device can be stored in a sterile state, making hygiene management of the molding device easy, and dirt such as dirt and dust can be removed from the molding device. If the molding device is stored in such a way that it does not come into contact with the mold, there is no need to clean or disinfect the molding device when using the molding device. Unlike conventional disinfectants, antibacterial substances do not elute or vaporize from antibacterial zeolite, so the antibacterial substances do not change the taste of food, and the antibacterial substances are not toxic. Antibacterial effect lasts for a long time (semi-permanent). In addition, antibacterial zeolite is resistant to heat, so it is not easily affected by heat, and its antibacterial effect will not fade unless the molding device is heated to a temperature of 550°C or higher during production. Furthermore, in order to obtain the desired antibacterial and sterilizing properties, the amount of antibacterial zeolite added can be small, and the processability can be maintained in a good state without impairing the inherent physical properties of the resin, etc. There are effects such as being able to maintain economic efficiency.

[Table] This means that no bacteria were detected.

【table】

【table】

This means that no bacteria were detected.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a perspective view of the aseptic food molding device of the present invention, FIG. 2 is a partial sectional view taken along the line - in FIG. 1, and FIG. FIG. 4 is a cross-sectional view of the antibacterial material and a perspective view showing another embodiment of the present invention. 1... Sterile food molding device, 2... Container body, 3
...Push lid, 5...Resin, 5'...Thermoplastic resin,
6... Antibacterial zeolite, 7... Sheet, 8...
Thermoplastic resin sheet, 9...Multilayer sheet.

Claims (1)

[Claims for Utility Model Registration] (1) The surface of the molding device is made mainly of a resin and an antibacterial zeolite, and the antibacterial zeolite is in an amount of 0.1 to 5% by weight based on the total weight of the resin. A sterile food molding device characterized by being made of a material. (2) The aseptic food molding device according to claim 1, wherein the resin is high-density polyethylene (HDPE) or low-density polyethylene (LDPE). (3) The antibacterial zeolite is an aseptic food molding device according to claim 1 or 2 of the utility model registration claim, in which some or all of the ion-exchangeable ions in the zeolite are replaced with antibacterial metal ions. . (4) The antibacterial zeolite has sterility according to claim 1 or 2 of the utility model registration claim, in which some or all of the ion-exchangeable ions in the zeolite are replaced with ammonium ions and antibacterial metal ions. Food molding machine. (5) The antibacterial metallic zeolite is a silver, copper or zinc ion.
Or the sterile food forming device according to item 4. (6) The antibacterial material mainly consists of a thermoplastic resin and an antibacterial zeolite, and the antibacterial zeolite is based on the total weight of the thermoplastic resin.
In the range of 0.1 to 5% by weight, and from 0.03mm
The sterile food according to one item selected from claims 1 to 5 of the utility model registration claim, which is a multilayer sheet in which at least one thermoplastic resin sheet is fused or adhered to a 0.1 mm thick sheet. Molding machine.