Draining bag and method of using draining bag

Abstract

To provide a draining bag capable of enhancing durability of an antibacterial effect.SOLUTION: A draining bag 10 made of a resin-film 10F comprises a bottom part 11 and a sidewall part 12. The draining bag 10 has a plurality of water passing holes 10H. An antibacterial agent is kneaded into the 10F of the film. The content of the antibacterial agent in the 10F part of the film is 10-50 mass%. The plastic film 10F includes a film-shaped matrix. The antimicrobial agent is dispersed in the base material, and the antimicrobial agent includes a first antimicrobial agent in which a part of the antimicrobial agent is exposed to the outside of the base material.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a draining bag and a method for using the draining bag. [Background technology]

[0002] Kitchen sinks are equipped with a drainer for collecting food waste generated during cooking. A drainer bag is sometimes attached to the drainer so that the food waste collected in the drainer can be easily disposed of. One example of a drainer bag has a body made of nonwoven fabric. A liquid with antibacterial properties is applied to the body (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-189405 Summary of the Invention [Problem to be solved by the invention]

[0004] When using a draining bag, water is supplied to the draining bag. Therefore, liquid on the surface of the nonwoven fabric is washed away by the water supplied to the draining bag. Furthermore, since nonwoven fabric can absorb water that comes into contact with the nonwoven fabric, the liquid absorbed into the nonwoven fabric is diluted or replaced by newly absorbed water. Therefore, the antibacterial effect of the liquid applied to the main body is easily lost. [Means for solving the problem]

[0005] The draining bag for solving the above problem is made of a resin film and has a bottom and sidewalls. The draining bag has a plurality of water-passing holes. An antibacterial agent is kneaded into the resin film, and the content of the antibacterial agent in the resin film is 10% by mass or more and 50% by mass or less. The resin film includes a film-shaped base material. The antibacterial agent is dispersed in the base material, and includes a first antibacterial agent, part of which is exposed to the outside of the base material. A draining bag for solving the above problem is made of a resin film and has a bottom and side walls. The draining bag has a plurality of water-passing holes. A plurality of antibacterial agents are kneaded into the resin film, and the content of the antibacterial agents in the resin film is 10% by mass or more and 50% by mass or less. The resin film includes a film-shaped base material. The plurality of antibacterial agents are dispersed in the base material, and the antibacterial agents include a first antibacterial agent, a portion of which is exposed to the outside of the base material, and a second antibacterial agent, the entirety of which is located within the base material.

[0006] According to the above-mentioned draining bag, the antibacterial agent kneaded into the resin film dissolves in the water supplied to the draining bag, thereby exerting its antibacterial effect, and therefore the antibacterial effect is highly sustained. Furthermore, since the content of the antibacterial agent is 10% by mass or more, it is possible to reliably exert the antibacterial effect of the antibacterial agent. Furthermore, since the content of the antibacterial agent is 50% by mass or less, it is possible to produce a resin film containing the antibacterial agent.

[0007] In the above-mentioned draining bag, the draining bag may be configured to be able to stand on its own. With this draining bag, it can be used in an upright position without using any tool to support the draining bag.

[0008] In the above-mentioned draining bag, the plurality of water-passing holes may be located only in the bottom. With this draining bag, since the side wall does not have water-passing holes, the area available for containing the antibacterial agent in the side wall is increased, thereby enhancing the antibacterial effect of the draining bag. Furthermore, since the side wall does not have water-passing holes, the side wall has increased elasticity and stiffness, making it easier for the draining bag to stand on its own.

[0009] In the draining bag, the antibacterial agent may contain an alkaline inorganic salt. With this draining bag, the antibacterial agent dissolves in water, thereby increasing the pH at and near the surface of the resin film, making it difficult for bacteria that cause food poisoning to grow.

[0010] In the draining bag, the antibacterial agent may contain calcium hydroxide. In this draining bag, calcium hydroxide dissolves and diffuses in water, thereby enabling the antibacterial effect to be exerted over a wider area than the surface of the resin film. Furthermore, calcium hydroxide has a solubility sufficient to exert the antibacterial effect, but is also sparingly soluble, which allows the antibacterial effect to be prolonged. A method of using a draining bag to solve the above problem involves placing wet food waste in the space defined by the inner surface of the draining bag and then using the draining bag. [Effects of the Invention]

[0011] According to the present invention, the durability of the antibacterial effect can be increased. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a perspective view showing a draining bag in one embodiment in a self-standing state. FIG. [Figure 2] FIG. 2 is a cross-sectional view schematically showing the structure of a resin film that constitutes the draining bag shown in FIG. [Figure 3] 2 is a cross-sectional view showing a state in which a resin film is folded in the process of manufacturing the draining bag shown in FIG. 1. FIG. [Figure 4]FIG. 10 is a perspective view showing a modified drainer bag in a self-standing state. [Figure 5] 5 is a perspective view showing the modified drainer bag shown in FIG. 4 in a folded state. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0013] An embodiment of the drainer bag will be described with reference to FIGS. 1 to 3. FIG. [structure] Figure 1 shows the draining bag standing upright.

[0014] As shown in FIG. 1, the draining bag 10 is composed of a bottom 11 and side walls 12. The draining bag 10 is made of a resin film 10F. An antibacterial agent is kneaded into the resin film 10F. In this embodiment, the draining bag 10 is formed from a single resin film 10F. When the draining bag 10 is in a freestanding state, the side walls 12 have a cylindrical shape. The side walls 12 are composed of a front wall 12F and a rear wall 12R. The side walls 12 have a pair of welded portions 12A. Each welded portion 12A extends vertically. One welded portion 12A is formed by welding one edge of the front wall 12F and one edge of the rear wall 12R, both of which extend vertically. The other welded portion 12A is a portion where the other edge of the front wall portion 12F and the other edge of the rear wall portion 12R, which extend along the vertical direction, are welded together.

[0015] Bottom 11 has a shape that closes one of the cylindrical ends of side wall 12. Bottom 11 has a generally hexagonal shape when viewed from the opening of side wall 12. In the direction from one welded portion 12A to the other welded portion 12A, bottom 11 is inclined relative to a central portion that includes the center of bottom 11 such that the ends connected to each welded portion 12A are positioned vertically upward as they move away from the central portion.

[0016] The draining bag 10 is configured to be able to stand on its own. In this embodiment, the draining bag 10 stands upright by the vertical lower end of each welded portion 12A and the center of the bottom portion 11 contacting the placing surface. This allows the draining bag 10 to be used in an upright position without the need for any fixtures to support the bag. This eliminates the need to place fixtures to support the bag 10 on the sink, making it easier to keep the sink clean.

[0017] The draining bag 10 has multiple water-through holes 10H. In the draining bag 10 of this embodiment, the multiple water-through holes 10H are located only in the bottom 11. Therefore, because the side wall 12 does not have water-through holes, the area available for containing the antibacterial agent in the side wall 12 is increased, thereby enhancing the antibacterial effect of the draining bag 10. Furthermore, because the side wall 12 does not have water-through holes, the elasticity and stiffness of the side wall 12 are increased, making it easier for the draining bag 10 to stand on its own. Note that the higher the elastic modulus of the resin film 10F that constitutes the side wall 12, the greater the elasticity and stiffness of the side wall 12.

[0018] Each water passage hole 10H penetrates the resin film 10F constituting the draining bag 10 along the thickness direction of the resin film 10F. Each water passage hole 10H is, for example, a circular hole. That is, in the resin film 10F, the edges defining the water passage hole 10H have a circular shape. In this embodiment, all of the water passage holes 10H have the same size. The diameter of the water passage hole 10H is, for example, 1.0 mm or more and 5.0 mm or less, preferably 1.5 mm or more and 4.0 mm or less, and most preferably 2.0 mm or more and 3.5 mm or less.

[0019] The plurality of water passage holes 10H may include water passage holes 10H having a first size and water passage holes 10H having a second size different from the first size. The edges defining the water passage holes 10H may have a shape other than a circle. For example, the edges defining the water passage holes 10H may have an elliptical shape or a polygonal shape. The plurality of water passage holes 10H may include water passage holes 10H having a first shape and water passage holes 10H having a second shape different from the first shape.

[0020] When the colander bag 10 is in use, it is placed in a freestanding state on, for example, a kitchen sink. Water is supplied to the inner surface of the colander bag 10 from a faucet or by the inner surface coming into contact with wet food waste. The outer surface of the colander bag 10 comes into contact with water supplied from a faucet to the sink, or water is supplied directly to the outer surface from the faucet. In such a usage state, even if the colander bag 10 has a water vent in the side wall 12, the water pressure inside the colander bag 10 does not increase to a level that would allow water to pass from the inner surface of the colander bag 10 to the outer surface through the water vent located in the side wall 12. Therefore, by providing the water vent 10H in the bottom 11 of the colander bag 10, water supplied into the colander bag 10 can be sufficiently discharged from the inside of the colander bag 10.

[0021] FIG. 2 shows a schematic cross-sectional structure of the resin film 10F that constitutes the draining bag 10. As shown in FIG. As shown in Figure 2, antibacterial agent 10FA is kneaded into resin film 10F. The content of antibacterial agent 10FA in resin film 10F is 10% by mass or more and 50% by mass or less. According to draining bag 10, antibacterial agent 10FA kneaded into resin film 10F dissolves in water supplied to draining bag 10, thereby exerting its antibacterial effect, and therefore the antibacterial effect is highly sustained. Furthermore, since the content of antibacterial agent 10FA is 10% by mass or more, it is possible to reliably exert the antibacterial effect of antibacterial agent 10FA. Furthermore, since the content of antibacterial agent 10FA is 50% by mass or less, it is possible to produce resin film 10F containing antibacterial agent 10FA.

[0022] The resin film 10F is composed of a film-shaped base material 10FB and an antibacterial agent 10FA dispersed in the base material 10FB. The thickness of the resin film 10F is, for example, 20 μm to 70 μm, preferably 25 μm to 60 μm, and most preferably 30 μm to 50 μm. In the present disclosure, the thickness of the resin film 10F refers to the thickness of the base material 10FB. The base material may be formed from various synthetic resins. The base material may be formed from, for example, polyethylene. The polyethylene may be linear low-density polyethylene (LLDPE), low-density polyethylene (LDPE), or high-density polyethylene (HDPE).

[0023] The antibacterial agent 10FA is granular. In the resin film 10F, the percentage of the mass of the antibacterial agent 10FA relative to the total mass of the base material 10FB and the mass of the antibacterial agent 10FA is 10% by mass or more and 50% by mass or less. The average particle size of the antibacterial agent 10FA is several μm, which is smaller than the thickness of the resin film 10F. The average particle size of the antibacterial agent 10FA is, for example, 5 μm. The average particle size of the antibacterial agent 10FA is the average particle size defined in JIS Z 8901:2006 "Test Powders and Test Particles."

[0024] The multiple antibacterial agents 10FA include a first antibacterial agent FA1, a portion of which is exposed outside the base material 10FB, and a second antibacterial agent FA2, a portion of which is located within the base material 10FB. The first antibacterial agent FA1 includes a first antibacterial agent FA1 contained on the inner surface of the draining bag 10 and a first antibacterial agent FA1 contained on the outer surface of the draining bag 10. When water is supplied to the draining bag 10, the first antibacterial agent FA1 contained on the inner surface of the draining bag 10 dissolves in the water, thereby supplying an aqueous solution of the antibacterial agent 10FA into the space defined by the draining bag 10. This provides antibacterial protection for the interior of the draining bag 10. Meanwhile, the first antibacterial agent FA1 contained on the outer surface of the draining bag 10 dissolves in the water, thereby spreading the aqueous solution of the antibacterial agent 10FA outside the draining bag 10 through the outer surface of the draining bag 10. This provides antibacterial protection for the area around the draining bag 10.

[0025] In contrast, the second antibacterial agent FA2 increases the elastic modulus of the resin film 10F compared to when the resin film 10F is formed only from the base material 10FB, thereby improving the self-supporting ability of the draining bag 10 formed using the resin film 10F.

[0026] The antibacterial agent 10FA is preferably water-soluble but sparingly soluble. The antibacterial agent 10FA may include an antibacterial agent formed from a first material and an antibacterial agent formed from a second material different from the first material. The antibacterial agent 10FA may be, for example, an alkaline inorganic salt. When the antibacterial agent 10FA is an alkaline inorganic salt, the antibacterial agent 10FA dissolves in water, thereby increasing the pH at and near the surface of the resin film 10F, thereby making it difficult for bacteria that cause food poisoning to grow.

[0027] The antibacterial agent 10FA is preferably calcium hydroxide. Calcium hydroxide dissolves and diffuses in water, which allows it to exert its antibacterial effect over a wider area than the surface of the resin film 10F. Calcium hydroxide is also sparingly soluble while being soluble enough to exert its antibacterial effect, which allows it to enhance the durability of its antibacterial effect.

[0028] [Manufacturing method] A method for manufacturing the draining bag 10 will be described with reference to Fig. 3. Fig. 3 shows the state in which the resin film 10F is folded during the manufacturing process of the draining bag 10.

[0029] When producing the draining bag 10, first, a resin film 10F having the antibacterial agent 10FA kneaded therein is produced. The resin film 10F can be produced by, for example, an inflation method or an extrusion method. As described above, by setting the upper limit of the content of the antibacterial agent 10FA at 50% by mass, tearing of the resin film 10F is prevented when the resin film 10F is produced using an inflation method. Furthermore, by setting the upper limit of the content of the antibacterial agent 10FA at 50% by mass, when the resin film 10F is produced using an extrusion method, the material of the resin film 10F containing the antibacterial agent 10FA is prevented from becoming too hard, thereby preventing the material from becoming difficult to extrude from a die. From the viewpoint of making the resin film 10F easier to produce, it is preferable that the upper limit of the content of the antibacterial agent 10FA be 30% by mass.

[0030] Next, resin film 10F is cut according to the size of one drainer bag 10. Note that water passage hole 10H may be formed in a portion of resin film 10F corresponding to bottom 11 of drainer bag 10 before resin film 10F is cut, or may be formed in a portion of resin film 10F corresponding to bottom 11 of drainer bag 10 after resin film 10F is cut.

[0031] 3, one sheet of resin film 10F is folded so that the cross section along the thickness direction of resin film 10F has a W-shape. That is, resin film 10F is folded in the thickness direction of resin film 10F so that one peak portion 10F2 is sandwiched between two valley portions 10F1. As a result, a front film wall portion 10FF and a rear film wall portion 10FR are formed so as to sandwich peak portion 10F2.

[0032] Next, one vertical edge of the film front wall portion 10FF is welded to a pair of vertical edges of the film rear wall portion 10FR, and the other vertical edge of the film front wall portion 10FF is welded to the other vertical edge of the film rear wall portion 10FR, thereby forming the drainer bag 10.

[0033] When draining bag 10 is to be used, side wall 12 is opened so that front wall 12F of side wall 12 is separated from rear wall 12R. Then, bottom 11 is unfolded so that it is crushed downward. This allows draining bag 10 to stand on its own.

[0034] [Example] Examples and comparative examples will be described with reference to Table 1. [Comparative Example 1] A resin film having a thickness of 40 μm was formed from low-density polyethylene by an inflation method, thereby obtaining a resin film of Comparative Example 1.

[0035] Comparative Example 2 A resin film having a thickness of 40 μm was formed from high-density polyethylene by an inflation method, thereby obtaining a resin film of Comparative Example 2.

[0036] Comparative Example 3 A resin film having a thickness of 40 μm was formed by an inflation method using 95% by mass of low-density polyethylene and 5% by mass of an antibacterial agent, thereby obtaining a resin film of Comparative Example 3. The antibacterial agent used was an antibacterial agent made of calcium hydroxide (manufactured by WM Co., Ltd., Scallow Premium R) (Scallow Premium is a registered trademark).

[0037] Comparative Example 4 A resin film of Comparative Example 4 was obtained in the same manner as in Comparative Example 3, except that the low-density polyethylene in Comparative Example 3 was changed to high-density polyethylene.

[0038] Comparative Example 5 A resin film of Comparative Example 5 was obtained in the same manner as in Comparative Example 3, except that the content of low-density polyethylene in Comparative Example 3 was changed to 92.5% by mass and the content of antibacterial agent was changed to 7.5% by mass.

[0039] Comparative Example 6 A resin film of Comparative Example 6 was obtained in the same manner as in Comparative Example 4, except that the content of high-density polyethylene in Comparative Example 4 was changed to 92.5% by mass and the content of the antibacterial agent was changed to 7.5% by mass.

[0040] [Example 1] In Comparative Example 6, the resin film of Example 1 was obtained by the same method as in Comparative Example 6, except that the content of high-density polyethylene was changed to 90% by mass, the content of antibacterial agent was changed to 10% by mass, and a resin film having a thickness of 30 μm was formed.

[0041] [Example 2] A resin film of Example 2 was obtained in the same manner as in Example 1, except that the high density polyethylene in Example 1 was changed to low density polyethylene and the thickness of the resin film was changed to 40 μm.

[0042] [Example 3] A resin film of Example 3 was obtained in the same manner as in Example 2, except that the thickness of the resin film in Example 2 was changed to 45 μm.

[0043] [Example 4] A resin film of Example 4 was obtained in the same manner as in Example 2, except that the thickness of the resin film in Example 2 was changed to 50 μm.

[0044] Comparative Example 7 A resin film of Comparative Example 7 was obtained in the same manner as in Comparative Example 1. [Comparative Example 8] A resin film of Comparative Example 8 was obtained in the same manner as in Comparative Example 2.

[0045] [Example 5] A resin film of Example 5 was obtained in the same manner as in Example 1. [Example 6] A resin film of Example 6 was obtained in the same manner as in Example 2.

[0046] [Example 7] The resin film of Example 7 was obtained in the same manner as in Example 3. [Example 8] A resin film of Example 8 was obtained in the same manner as in Example 4.

[0047] [Evaluation method] The antibacterial effect of the resin films of each example and each comparative example was evaluated by a method conforming to JIS Z 2801:2010 "Antibacterial processed products - Antibacterial test method, antibacterial effect." In detail, first, a test piece measuring 20 mm square was cut out from each resin film, and then the test piece was cleaned. Three test pieces were prepared for each resin film. Next, 10 5 0.1 ml of the test bacteria solution adjusted to cfu / ml was measured and inoculated onto the test specimen. The test specimens of Examples 1 to 4 and Comparative Examples 1 to 6 were inoculated with Escherichia coli (E. coli) as the test bacteria. Meanwhile, the test specimens of Examples 5 to 8 and Comparative Examples 7 and 8 were inoculated with Staphylococcus aureus as the test bacteria. Subsequently, a 20 mm square sterile film was placed on the test specimen's bacterial solution.

[0048] The test specimens were stored for 24 hours in an environment of 35°C and 100% relative humidity (RH). Subsequently, the bacterial solution was washed out of the test specimens after storage using 2.5 ml of SCDLP medium. The number of viable bacteria in the bacterial solution diluted with SCDLP medium was then measured using the pour plate culture method. The natural logarithm of the viable bacterial count was calculated for each test specimen in each Example and Comparative Example, and then the Log average, which is the average value of the natural logarithm of the viable bacterial count for three test specimens, was calculated.

[0049] The antibacterial activity value was calculated using the following formula: An antibacterial activity value of 2.0 or more was judged to have an antibacterial effect (◯), and an antibacterial activity value of less than 2.0 was judged to have no antibacterial effect (×). Antibacterial activity value = (Log average value of resin film without antibacterial agent) - (Log average value of resin film containing antibacterial agent)

[0050] The antibacterial effects of the resin films of Comparative Examples 3 and 5 and Examples 2 to 4 were calculated based on the Log average value of Comparative Example 1. The antibacterial effects of the resin films of Comparative Examples 4 and 6 and Example 1 were calculated based on the Log average value of Comparative Example 2. The antibacterial effects of the resin films of Examples 6 to 8 were calculated based on the Log average value of Comparative Example 7. The antibacterial effect of the resin film of Example 5 was calculated based on the Log average value of the resin film of Comparative Example 8.

[0051] [Evaluation results] The antibacterial effects of the resin films of each Example and Comparative Example were evaluated, and the results are shown in Table 1 below.

[0052] [Table 1]

[0053] As shown in Table 1, the antibacterial activity values ​​of the resin films of Examples 1 to 4 were 2.0 or higher, indicating that the resin films of Examples 1 to 4 had an antibacterial effect against E. coli. In contrast, the antibacterial activity values ​​of the resin films of Comparative Examples 3 to 6 were less than 1.0, indicating that the resin films of Comparative Examples 3 to 6 did not have an antibacterial effect against E. coli. Thus, it was confirmed that the resin film had an antibacterial effect when the content of the antibacterial agent in the resin film was 10% by mass, whereas the resin film did not have an antibacterial effect when the content of the antibacterial agent was less than 10% by mass.

[0054] Furthermore, since the antibacterial activity values ​​of the resin films of Examples 5 to 8 were 2.0 or higher, it was confirmed that the resin films of Examples 5 to 8 had an antibacterial effect against Staphylococcus aureus. That is, it was confirmed that the resin films containing 10% by mass of the antibacterial agent had antibacterial properties against multiple types of food poisoning-causing bacteria. In particular, it was confirmed that the resin films containing 10% by mass of the antibacterial agent had an antibacterial effect against both bacilli and cocci, and also against both gram-negative and gram-positive bacteria.

[0055] As described above, according to one embodiment of the drainer bag, the following effects can be obtained. (1) The antibacterial agent 10FA kneaded into the resin film 10F dissolves in the water supplied to the draining bag 10, thereby exerting its antibacterial effect, and therefore the antibacterial effect is highly sustained. Furthermore, since the content of the antibacterial agent 10FA is 10% by mass or more, the antibacterial effect of the antibacterial agent 10FA can be reliably exerted. Furthermore, since the content of the antibacterial agent 10FA is 50% by mass or less, it is possible to produce a resin film 10F containing the antibacterial agent 10FA.

[0056] (2) The draining bag 10 can be used in an upright position without using any device to support the draining bag 10. (3) Because side wall 12 does not have water-passing holes, the area of ​​side wall 12 that can contain antibacterial agent 10FA is increased, thereby enhancing the antibacterial properties of draining bag 10. Also, because side wall 12 does not have water-passing holes, the elasticity and stiffness of side wall 12 are increased, making draining bag 10 easier to stand on its own.

[0057] (4) The antibacterial agent 10FA dissolves in water, thereby increasing the pH at and near the surface of the resin film 10F, making it possible to make it difficult for bacteria that cause food poisoning to grow.

[0058] (5) Calcium hydroxide dissolves in water and diffuses, which allows it to exert its antibacterial effect over a wider area than the surface of the resin film 10F. Furthermore, calcium hydroxide has a solubility sufficient to exert its antibacterial effect, but is also sparingly soluble, which allows it to enhance the durability of its antibacterial effect.

[0059] The above-described embodiment can be modified as follows. [Water vent] The draining bag 10 may have a water-passing hole located in the bottom 11 and a water-passing hole located in the side wall 12. Even in this case, the effect equivalent to that of (1) above can be obtained by kneading the antibacterial agent 10FA into the resin film 10F that constitutes the draining bag 10 and by setting the content of the antibacterial agent 10FA to 10% by mass or more and 50% by mass or less.

[0060] [Draining bag] The draining bag may have the shape described below with reference to Figures 4 and 5. Note that the draining bag described below is configured to be able to stand on its own, similar to the draining bag 10 described above. Figure 4 shows the draining bag in a state where it is standing on its own. Figure 5 shows the draining bag in a folded state.

[0061] As shown in FIG. 4, draining bag 20 has a bottom 21 and side walls 22. When draining bag 20 is in a freestanding state, bottom 21 has a rectangular shape, and side walls 22 have a rectangular tubular shape rising from the edge of bottom 21. Side walls 22 have a front wall 22F, a rear wall 22R, and a pair of lateral walls 22S. Front wall 22F faces rear wall 22R. The pair of lateral walls 22S are located between front wall 22F and rear wall 22R. Each lateral wall 22S connects front wall 22F to rear wall 22R. A plurality of water passage holes 20H are located in bottom 21. Draining bag 20 is formed from a resin film 20F.

[0062] As shown in Figure 5, when the draining bag 20 is folded, the front wall 20FF of the resin film 20F overlaps the rear wall 20FR. A pair of side walls 20FS are located between the front and rear walls 20FF and 20FR. Each side wall 20FS is folded so that its peak 20FC is located between the front and rear walls 20FF and 20FR.

[0063] The resin film 20F has a first welded portion 20A and a second welded portion 20B. The first welded portion 20A is located vertically near the bottom end of the film front wall portion 20FF and near the bottom end of the film rear wall portion 20FR. The first welded portion 20A extends in a direction from one film side wall portion 20FS to the other film side wall portion 20FS. At the first welded portion 20A, a portion of the film front wall portion 20FF is welded to a portion of the film rear wall portion 20FR so as to sandwich a portion of each film side wall portion 20FS with the film rear wall portion 20FR.

[0064] The second welded portion 20B is located in the film rear wall portion 20FR and extends in the vertical direction. When producing the draining bag 20, a sheet of resin film 20F is folded into a cylindrical shape. Next, the second welded portion 20B is formed, and then the first welded portion 20A is formed. Note that the water passage hole 20H is formed in the resin film 20F before folding the resin film 20F, but the water passage hole 20H may be formed in the resin film 20F after folding the resin film 20F.

[0065] When the draining bag 20 is made to stand on its own, the ridges 20FC of the film side wall portions 20FS are pushed outward from the draining bag 20, thereby expanding the draining bag 20 so that the film front wall portion 20FF moves away from the film rear wall portion 20FR. As a result, the bottom 21 is formed from a portion of the film front wall portion 20FF, a portion of the film rear wall portion 20FR, and a portion of the film side wall portion 20FS. At this time, the portions of the film front wall portion 20FF and the film rear wall portion 20FR below the first welded portion 20A are folded along the bottom 21. The portion of the film front wall portion 20FF other than the portion that forms the bottom 21 forms the front wall portion 22F of the side wall portion 22. The portion of the film rear wall portion 20FR other than the portion that forms the bottom 21 forms the rear wall portion 22R of the side wall portion 22. Furthermore, the portions of each film lateral wall portion 20FS other than the portion that forms the bottom portion 21 form the lateral wall portion 22S of the side wall portion 22.

[0066] The draining bags 10, 20 do not have to be able to stand on their own. Even in this case, the effect equivalent to that of (1) above can be obtained by kneading the antibacterial agent 10FA into the resin film 10F, 20F that constitutes the draining bags 10, 20 and by setting the content of the antibacterial agent 10FA to 10% by mass or more and 50% by mass or less. In this case, the draining bags 10, 20 can be made to stand by using them together with a support tool. Furthermore, even if the draining bags 10, 20 are configured to be able to stand on their own, they may be used together with a support tool.

[0067] The draining bags 10, 20 may be formed from two or more resin films. Even in this case, the effect equivalent to that of (1) above can be obtained as long as the content of the antibacterial agent 10FA in the resin films 10F, 20F is 10% by mass or more and 50% by mass or less. [Note] The technical ideas derived from the above-described embodiment and modifications are described below. [Appendix 1] A draining bag made of a resin film consisting of a bottom and a side wall, The draining bag has a plurality of water holes, An antibacterial agent is kneaded into the resin film, The content of the antibacterial agent in the resin film is 10% by mass or more and 50% by mass or less. Draining bag. [Appendix 2] The draining bag is configured to be able to stand on its own. The draining bag described in Appendix 1. [Appendix 3] The plurality of water vent holes are located only in the bottom portion. A draining bag as described in Appendix 1 or 2. [Appendix 4] The antibacterial agent comprises an alkaline inorganic salt. A draining bag according to any one of appendices 1 to 3. [Appendix 5] The antibacterial agent includes calcium hydroxide A draining bag according to any one of appendices 1 to 4. [Explanation of symbols]

[0068] 10... Draining bag 10FA...Antibacterial agent 10H…Water hole 11...Bottom 12...Side wall

Claims

1. A draining bag made of a resin film consisting of a bottom and a side wall, The draining bag has a plurality of water holes, An antibacterial agent is kneaded into the resin film, the content of the antibacterial agent in the resin film is 10% by mass or more and 50% by mass or less, The resin film includes a base material having a film shape, The antibacterial agent is dispersed in the matrix, The antibacterial agent includes a first antibacterial agent, a portion of which is exposed to the outside of the base material. Draining bag.

2. A draining bag made of a resin film consisting of a bottom and a side wall, The draining bag has a plurality of water holes, A plurality of antibacterial agents are kneaded into the resin film, the content of the antibacterial agent in the resin film is 10% by mass or more and 50% by mass or less, The resin film includes a base material having a film shape, the plurality of antimicrobial agents are dispersed in the matrix; The plurality of antibacterial agents include a first antibacterial agent, a portion of which is exposed to the outside of the base material; a second antimicrobial agent located entirely within the matrix. Draining bag.

3. The draining bag is configured to be able to stand on its own. The draining bag according to claim 1 or 2.

4. The plurality of water vent holes are located only in the bottom portion. The drainer bag according to any one of claims 1 to 3.

5. The antibacterial agent comprises an alkaline inorganic salt. The drainer bag according to any one of claims 1 to 4.

6. The antibacterial agent includes calcium hydroxide The drainer bag according to any one of claims 1 to 5.

7. The draining bag according to any one of claims 1 to 6 is used by placing wet food waste in a space defined by the inner surface of the draining bag. How to use a draining bag.

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