Medical waste containers

Abstract

To provide a medical waste container which inhibits deterioration of antimicrobial properties over a long period.SOLUTION: Provided is a medical waste container which is made of a resin composition. The resin composition contains a thermoplastic resin and an inorganic substance powder in a mass ratio between 50:50 and 10:90. The thermoplastic resin includes a polyolefin resin. The inorganic substance powder includes calcium carbonate.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to containers for medical waste. [Background technology]

[0002] A medical waste container is a container for storing various types of medical waste generated in conjunction with medical procedures at medical institutions and the like. Containers that hold medical waste are incinerated after collection. For this reason, containers made of general-purpose resins (polyolefin resins, etc.) are widely used as medical waste containers. From the viewpoint of resource recycling, containers for medical waste that use waste paper as a material together with resin have also been proposed (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-328253 Summary of the Invention [Problem to be solved by the invention]

[0004] However, from the standpoint of reliably preventing secondary infection from waste, there is a need for medical waste containers that also have long-term antibacterial properties.

[0005] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a container for medical waste in which the decrease in antibacterial properties is suppressed over a long period of time. [Means for solving the problem]

[0006] The present inventors have found that the above-mentioned problems can be solved by a medical waste container containing calcium carbonate in addition to a polyolefin resin, and have completed the present invention. More specifically, the present invention provides the following.

[0007] (1) A container for medical waste, comprising: The medical waste container is made of a resin composition, The resin composition contains a thermoplastic resin and an inorganic substance powder in a mass ratio of 50:50 to 10:90, the thermoplastic resin includes a polyolefin resin, The inorganic powder includes calcium carbonate. Containers for medical waste.

[0008] (2) The medical waste container according to (1), wherein the calcium carbonate is ground calcium carbonate.

[0009] (3) The container for medical waste according to (1), wherein the inorganic powder has an average particle size of 0.7 μm or more and 6.0 μm or less, as measured by an air permeability method according to JIS M-8511.

[0010] (4) A container for medical waste according to (1), in which a portion of the inorganic substance powder is exposed on the outermost surface of the container for medical waste.

[0011] (5) The medical waste container according to (4), wherein the ratio of the exposed area of ​​the inorganic powder to the area of ​​the outermost surface is 25% or more and 75% or less.

[0012] (6) A medical waste container according to any one of (1) to (5), comprising a container body and a lid body removably attached to the container body.

[0013] (7) The medical waste container according to (6), wherein the container body and the lid are engageable with each other.

[0014] (8) The medical waste container according to (6), wherein the container body has an expandable structure.

[0015] (9) The medical waste container according to (6), wherein the container body and / or the lid are provided with a handle.

[0016] (10) A container for medical waste according to (6), in which a bag is disposed inside the container for medical waste.

[0017] (11) The container for medical waste according to (1), wherein the container for medical waste is formed by injection molding of the resin composition. Effect of the Invention

[0018] According to the present invention, a medical waste container is provided in which the decrease in antibacterial properties is suppressed over a long period of time. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of the present invention will be described, but the present invention is not limited thereto.

[0020] <Medical waste container> A container for medical waste according to one embodiment of the present invention (hereinafter also referred to as "the container of the present invention") satisfies the following requirements. The medical waste container is made of a resin composition. The resin composition contains a thermoplastic resin and an inorganic substance powder in a mass ratio of 50:50 to 10:90. The thermoplastic resin includes a polyolefin resin. The inorganic powder contains calcium carbonate.

[0021] A container that satisfies the above requirements can achieve long-term antibacterial properties due to the action of the inorganic powder (particularly calcium carbonate). Although it is known that the blending of inorganic powders tends to increase the strength of resin products, it is a surprising finding that the blending can maintain antibacterial properties for a long period of time without impairing strength.

[0022] In the present invention, "antibacterial properties" can be evaluated by a method based on JIS Z 2801:2010 (antibacterial products-antibacterial test method, antibacterial effect). According to this method, the lower the viable cell count of microorganisms (such as E. coli), the higher the antibacterial properties.

[0023] In the present invention, "the decrease in antibacterial activity over a long period of time is suppressed" includes, for example, that the antibacterial activity is maintained even when the container is stored at room temperature for five years or more. Whether a container has long-term antibacterial properties can be determined not only by long-term storage tests, but also by evaluating the antibacterial properties of a container that has been subjected to a heat aging treatment in accordance with JIS K 7368:1999, as shown in the examples.

[0024] In the present invention, the term "container for medical waste" includes any container for storing various medical waste generated in conjunction with medical procedures in medical institutions and the like. Medical waste includes injection needles, syringes, syringe barrels, ampoules, gloves, masks, and materials with body fluids or the like attached thereto (fibers, rubber products, resin products, etc.).

[0025] In the present invention, the phrase "consisting of component A" means that the composition does not substantially contain any components other than component A.

[0026] In the present invention, "substantially free of component B" includes an embodiment in which the content of component B is less than 0.1 mass% relative to the entire blended object (e.g., a resin composition), more preferably an embodiment in which the content of component B is 0.01 mass% or less, and even more preferably an embodiment in which component B is not contained at all.

[0027] The container of the present invention is molded from a specified resin composition, but does not exclude embodiments in which a component other than the resin composition is included (for example, an embodiment in which a label or the like is affixed to the surface of the container).

[0028] The configuration of the container of the present invention will be described in detail below.

[0029] <Resin composition> The resin composition in the present invention corresponds to the material of the medical waste container, and the medical waste container can be obtained by molding the resin composition by any method. The resin composition contains at least a thermoplastic resin and an inorganic substance powder.

[0030] (1)Thermoplastic resin The thermoplastic resin is not particularly limited except that it contains a polyolefin resin, and any resin that can be usually blended in resin products can be used. The thermoplastic resin may be used alone or in combination of two or more kinds.

[0031] (1-1) Types of thermoplastic resins The thermoplastic resin contains at least a polyolefin resin, and is preferably made of a polyolefin resin. By combining the polyolefin resin with an inorganic powder described later, good antibacterial properties can be realized. Examples of thermoplastic resins other than polyolefin resins include polyester resins and polystyrene resins.

[0032] In the present invention, the term "polyolefin resin" refers to a polyolefin resin containing an olefin component unit as a main component. "Containing olefin component units as a main component" means that the olefin component units account for 50 mass % or more (preferably 75 mass % or more, more preferably 85 mass % or more, and even more preferably 90 mass % or more) of the polyolefin resin. The method for producing the polyolefin resin used in the present invention is not particularly limited, and may be any method using a Ziegler-Natta catalyst, a metallocene catalyst, a radical initiator (oxygen, peroxide, etc.), or the like.

[0033] Examples of polyolefin resins include polypropylene resins and polyethylene resins. From the viewpoint of easily achieving the effects of the present invention and easily realizing a good appearance, etc., the thermoplastic resin preferably contains a polypropylene-based resin and / or a polyethylene-based resin, and more preferably consists of a polypropylene-based resin and / or a polyethylene-based resin.

[0034] (1-1-1) Polypropylene resin The polypropylene resin in the present invention includes a resin containing propylene component units in an amount of preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, and most preferably 80% by mass or more.

[0035] Examples of polypropylene-based resins include polypropylene homopolymers (propylene homopolymers) and copolymers of propylene and other α-olefins (copolymerizable with propylene). Examples of the "other α-olefins" include α-olefins having 4 to 10 carbon atoms (such as ethylene, 1-butene, isobutylene, 1-pentene, 3-methyl-1-butene, 1-hexene, 3,4-dimethyl-1-butene, 1-heptene, and 3-methyl-1-hexene).

[0036] Propylene homopolymers include linear or branched polypropylenes exhibiting various stereoregularities (isotactic, syndiotactic, atactic, hemiisotactic, etc.).

[0037] The propylene copolymer may be any of a polypropylene random copolymer (random copolymer), a polypropylene block copolymer (block copolymer), a binary copolymer, a ternary copolymer, etc. Specific examples include an ethylene-propylene random copolymer, a butene-1-propylene random copolymer, an ethylene-butene-1-propylene random terpolymer, an ethylene-propylene block copolymer, etc.

[0038] Among the above polypropylene-based resins, a resin containing a polypropylene block polymer is preferred, and a resin made of a polypropylene block polymer is more preferred.

[0039] (1-1-2) Polyethylene resin The polyethylene resin in the present invention includes resins containing ethylene component units in an amount of preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, and most preferably 80% by mass or more.

[0040] Examples of polyethylene resins include high density polyethylene (HDPE), low density polyethylene (LDPE), medium density polyethylene (MDPE), linear low density polyethylene (LLDPE), ethylene-vinyl acetate copolymer, ethylene-propylene copolymer, ethylene-propylene-butene 1 copolymer, ethylene-butene 1 copolymer, ethylene-hexene 1 copolymer, ethylene-4 methylpentene 1 copolymer, and ethylene-octene 1 copolymer.

[0041] The polyethylene-based resin is preferably a resin containing high-density polyethylene and / or linear low-density polyethylene, and more preferably a resin made of high-density polyethylene and / or linear low-density polyethylene.

[0042] The high density polyethylene preferably has an MFR (190° C., 21.6 kg) according to JIS K 6922-1 (ISO1133) of 5 g / 10 min or more and 15 g / 10 min or less, more preferably 7 g / 10 min or more and 13 g / 10 min or less.

[0043] The linear low density polyethylene preferably has an MFR (190°C, 2.16 kg) according to JIS K 6922-1 (ISO1133) of 0.5 g / 10 min or more and 1.5 g / 10 min or less, and more preferably has an MFR of 0.7 g / 10 min or more and 1.3 g / 10 min or less.

[0044] In a resin containing high density polyethylene and linear low density polyethylene, the mass ratio of the two (high density polyethylene:linear low density polyethylene) is preferably 90:10 to 50:50, more preferably 92:8 to 50:50, and even more preferably 94:6 to 50:50.

[0045] (1-2) Thermoplastic resin content The content of the thermoplastic resin is not particularly limited as long as the thermoplastic resin and the inorganic substance powder can be blended in the ratio described below.

[0046] From the viewpoint of moldability and the like, the content of the thermoplastic resin is preferably 10% by mass or more, more preferably 15% by mass or more, and even more preferably 20% by mass or more, based on the resin composition.

[0047] The content of the thermoplastic resin is preferably 50% by mass or less, more preferably 45% by mass or less, and even more preferably 40% by mass or less, of the resin composition, from the viewpoint of being able to blend a sufficient amount of inorganic substance powder and easily exhibiting good antibacterial properties.

[0048] (2) Inorganic substance powder By blending a prescribed ratio of inorganic powder with a thermoplastic resin, it is possible to impart good antibacterial properties over a long period of time to the resulting container.

[0049] (2-1) Types of inorganic powders The inorganic substance powder is not particularly limited except that it contains calcium carbonate, and can be one contained in ordinary resin products, etc. The inorganic substance powder may be one type of substance alone or two or more types of substances in combination. However, preferred embodiments of the present invention include those containing only calcium carbonate as the inorganic substance powder.

[0050] (2-1-1) Calcium carbonate The calcium carbonate may be either heavy calcium carbonate or light calcium carbonate. "Heavy calcium carbonate" is calcium carbonate obtained by mechanically crushing (dry method, wet method, etc.) natural raw materials whose main component is CaCO3 (limestone, etc.). "Light calcium carbonate" is calcium carbonate prepared by a synthetic method (such as chemical precipitation reaction). Thus, ground calcium carbonate and light calcium carbonate are clearly distinguished from each other.

[0051] The difference between ground calcium carbonate and light calcium carbonate can be identified, for example, from the circularity calculated based on the analysis of SEM images. The roundness of the ground calcium carbonate powder is, for example, in the range of 0.50 to 0.95, and the roundness of the light calcium carbonate powder is, for example, approximately 1.00.

[0052] In the present invention, "circularity" is a value represented by the following formula, and is an index of the degree of irregularity of a particle. The closer the circularity is to "1" (maximum value), the closer it is to a perfect circle, and the lower the value, the higher the degree of irregularity. "Circularity" = (projected area of ​​particle) / (area of ​​circle with the same perimeter as the projected perimeter of the particle)

[0053] Heavy calcium carbonate, although its shape is not uniform due to its manufacturing process and is low cost, exhibits stable dispersibility and is easy to impart uniform antibacterial properties to the entire container. Due to such effects, it is expected that the variation in antibacterial properties during mass production of containers can be suppressed. Therefore, preferred embodiments of the present invention include those in which the calcium carbonate contains ground calcium carbonate and those in which the calcium carbonate consists of ground calcium carbonate.

[0054] (2-1-2) Inorganic powders other than calcium carbonate Examples of inorganic powders other than calcium carbonate include the following: Carbonates, sulfates, silicates, phosphates, or borates of metals (magnesium, aluminum, titanium, iron, zinc, etc.); Oxides of metals (calcium, magnesium, aluminum, titanium, iron, zinc, etc.); Hydrates of the above salts or oxides.

[0055] Examples of inorganic substance powders other than calcium carbonate include magnesium carbonate, zinc oxide, titanium oxide, silica, alumina, clay, talc, kaolin, aluminum hydroxide, magnesium hydroxide, aluminum silicate, magnesium silicate, calcium silicate, aluminum sulfate, magnesium sulfate, calcium sulfate, magnesium phosphate, barium sulfate, silica sand, carbon black, zeolite, molybdenum, diatomaceous earth, sericite, shirasu, calcium sulfite, sodium sulfate, potassium titanate, bentonite, and graphite.

[0056] The inorganic powder may be synthetic or derived from natural minerals.

[0057] In order to enhance the dispersibility and reactivity of the inorganic substance powder, the surface of the inorganic substance powder may or may not be previously modified in accordance with a conventional method. Examples of surface modification methods include physical treatment methods (plasma treatment, etc.) and chemical treatment methods (methods using coupling agents or surfactants).

[0058] The shape of the inorganic substance powder is not particularly limited, and may be any of particles (spherical, irregular, etc.), flakes, granules, fibers, and the like.

[0059] (2-2) Average particle size of inorganic powder The average particle size of the inorganic powder can be appropriately set depending on the moldability of the resin composition to be obtained. However, from the viewpoint of easily achieving stable dispersibility and easily achieving uniform antibacterial properties throughout the container, the average particle size of the inorganic substance powder as measured by the air permeation method in accordance with JIS M-8511 is preferably 0.7 μm or more and 6.0 μm or less, and more preferably 1.0 μm or more and 5.5 μm or less. The average particle size of the inorganic substance powder may be any size as long as the entire inorganic substance powder satisfies the above requirement.

[0060] (2-3) Amount of inorganic powder The content of the inorganic substance powder is not particularly limited as long as the thermoplastic resin and the inorganic substance powder can be blended in the ratio described below.

[0061] The content of the inorganic powder is preferably 50% by mass or more, more preferably 55% by mass or more, and even more preferably 60% by mass or more, based on the resin composition, from the viewpoint of easily exerting antibacterial properties due to the inorganic powder.

[0062] From the viewpoint of moldability and the like, the content of the inorganic substance powder is preferably 90% by mass or less, more preferably 85% by mass or less, and even more preferably 80% by mass or less, based on the resin composition.

[0063] From the viewpoint of easily exhibiting good antibacterial properties, the content of calcium carbonate in the inorganic substance powder is preferably 70% by mass or more, more preferably 80% by mass or more, and most preferably 100% by mass, based on the total amount of the inorganic substance powder.

[0064] Whether or not the inorganic powder contains calcium carbonate and its content can be determined by calcining the medical waste container and analyzing the ash content.

[0065] (3) Other ingredients The resin composition may contain, or may not contain, other components than the inorganic substance powder and the thermoplastic resin, as long as the effects of the present invention are not impaired.

[0066] As the other components, any components that can be usually mixed into a resin container can be used. Such components include dyes, lubricants, dispersants, antistatic agents, antioxidants, heat stabilizers, and ultraviolet absorbing agents. The types and amounts of these components can be appropriately determined depending on the effects to be obtained.

[0067] The resin composition in a preferred embodiment of the present invention includes those consisting of only a thermoplastic resin and an inorganic substance powder.

[0068] (4) Ratio of thermoplastic resin to inorganic powder In the resin composition, the mass ratio of the thermoplastic resin to the inorganic substance powder (thermoplastic resin:inorganic substance powder) is 50:50 to 10:90, preferably 45:55 to 15:85, and more preferably 40:60 to 20:80. In this way, by making the ratio of the inorganic powder to the thermoplastic resin equal to or greater than the above, the inorganic powder can more easily act on microorganisms and the like, thereby achieving stable antibacterial properties.

[0069] <Method of producing resin composition> As a method for producing the resin composition, conventionally known methods and conditions can be adopted depending on the form and application of the resin composition.

[0070] The resin composition can be obtained, for example, by mixing, melt-kneading, or the like, the constituent components. The machine for producing the resin composition can be selected depending on the form and application of the resin composition, and examples thereof include an extruder, a kneader, a Banbury mixer, and a kneader (such as a twin-screw kneader).

[0071] The form of the resin composition is not particularly limited, and any form that can be molded into a container can be adopted.

[0072] <Medical waste container> The container of the present invention can be obtained by molding the above resin composition by any method.

[0073] The configuration of medical waste containers is not particularly limited, and may be one that meets specified standards (e.g., "Manual for Infectious Waste Disposal Based on the Waste Disposal Act," March 2018, Ministry of the Environment, Environmental Regeneration and Resource Recycling Bureau) or may have a shape similar to that of commercially available medical waste containers.

[0074] The capacity of the medical waste container is, for example, 1 L or more and 100 L or less.

[0075] From the standpoint of easily maintaining good antibacterial properties, it is preferable that a part of the inorganic powder is exposed on the outermost surface of the medical waste container. The presence or absence and the degree of exposure of the inorganic substance powder can be identified by measuring the ratio of the exposed area of ​​the inorganic substance powder to the area of ​​the outermost surface (exposure ratio) using the method shown in the Examples. The higher the exposure ratio, the easier it tends to achieve good antibacterial properties, and it is preferably 25% or more and 75% or less, more preferably 30% or more and 70% or less.

[0076] The shape of the medical waste container is not particularly limited, but from the viewpoints of convenience and ease of sealing, it is preferable for the container to include a container body and a lid body removably attached to the container body. In this embodiment, medical waste is placed in the container body, and the medical waste container is sealed by covering the opening of the container body with the lid body.

[0077] In an embodiment in which the medical waste container includes a container body and a lid, it is preferable that the container body and the lid are engageable with each other, from the viewpoint of making it easier to obtain a medical waste container with high airtightness.

[0078] In a medical waste container including a container body and a lid, it is preferable that the container body has an expandable structure, from the viewpoint of facilitating storage of the medical waste container before use. An example of the "expandable structure" is a bellows structure.

[0079] In an embodiment in which the medical waste container includes a container body and a lid, it is preferable that the container body and / or the lid have a handle, from the viewpoint of making the medical waste container easier to transport safely.

[0080] In order to more easily maintain the antibacterial properties of the medical waste container, it is preferable that the medical waste container and the medical waste placed in the container are not in direct contact with each other. From this perspective, it is preferable that a bag be placed inside the medical waste container. By placing the medical waste in the bag, direct contact between the medical waste container and the medical waste can be prevented, and the antibacterial properties of the medical waste container can be efficiently maintained. Examples of the bag include those that are commonly used for storing waste, such as bags containing polyolefin resins and bags made of paper.

[0081] The method for molding the resin composition to obtain a medical waste container is not particularly limited, but examples thereof include injection molding. EXAMPLES

[0082] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples.

[0083] <Production and evaluation of medical waste containers> A medical waste container was prepared by the following method, and its antibacterial properties were evaluated.

[0084] (1) Preparation of materials The materials for each layer were prepared as follows:

[0085] (Inorganic substance powder) As the inorganic powder, calcium carbonate particles (ground calcium carbonate particles) were used. The calcium carbonate particles had an average particle size of 2.0 μm as measured by an air permeability method in accordance with JIS M-8511.

[0086] (thermoplastic resin) Any of the following thermoplastic resins (all of which correspond to polyolefin-based resins) was used. Polypropylene resin (PP): Polypropylene block copolymer (melting point 160°C) Polyethylene resin (PE): Blend of HDPE and LLDPE (HDPE:LLDPE (mass ratio) = 70:30) The MFR (190°C, 21.6 kg) of the above HDPE according to JIS K 6922-1 (ISO1133) is 7.5 g / 10 min. The MFR (190°C, 2.16 kg) of the above LLDPE according to JIS K 6922-1 (ISO1133) is 0.8 g / 10 min.

[0087] (2) Creation of medical waste containers A thermoplastic resin (PP or PE) and an inorganic substance powder were melt-kneaded in the ratio shown in the table, and then a pellet-shaped resin composition was obtained. Next, a medical waste container was obtained from the obtained resin composition by injection molding. The medical waste container prepared in this test consisted of a container body and a lid body that was removably and fitably attached to the container body. The size of the container body is 40 L (width 465 mm x depth 345 mm x height 365 mm). The thickness of the surface that constitutes the container body is approximately 5 mm.

[0088] (3) Measurement of the ratio of exposed area (exposure ratio) of inorganic powder The ratio of the exposed area of ​​the inorganic powder to the area of ​​the outermost surface of the container body was calculated according to the following method. First, 50 random non-overlapping sections (each section is 0.014 mm) were randomly selected from the surface of the container body. 2 ) was selected. Next, the area occupied by the inorganic powder relative to the area of ​​each section was measured using an electron microscope and image analysis software. The measured values ​​were averaged, and the average occupancy obtained was regarded as the ratio of the exposed area of ​​the inorganic substance powder to the area of ​​the outermost surface of the container body. The results are shown in the "Exposure Percentage" section of the table.

[0089] (4) Antibacterial evaluation of medical waste containers In accordance with JIS Z 2801:2010, test plates (approximately 5 mm) with the same composition as each medical waste container were prepared and their antibacterial properties were evaluated. After preparation, the medical waste containers were evaluated before and after heat aging treatment (121°C, 168 hours) in accordance with JIS K 7368: 1999. This heat aging treatment is equivalent to storage at room temperature for more than 5 years. The bacterial species used was Escherichia coli. The results are shown in the "Antibacterial Properties" section of the table. The values ​​in the table are for 1 cm of surface area of ​​the test plate. 2 The number of viable bacteria (visible colonies) per unit is shown, and "ND" means that no viable bacteria were detected. The lower the viable bacteria count, the higher the antibacterial activity.

[0090] [Table 1]

[0091] [Table 2]

[0092] As shown in the table, the medical waste containers that meet the requirements of the present invention had excellent antibacterial properties even after heat aging treatment. This shows that the medical waste containers that meet the requirements of the present invention can suppress the deterioration of antibacterial properties over a long period of time.

[0093] On the other hand, although the medical waste container according to the comparative example had antibacterial properties, the antibacterial properties were significantly reduced after the heat aging treatment.

[0094] Although no data is shown, all of the medical waste containers according to the examples and reference examples had Charpy impact strength (JISK7111-1:2012) sufficient for practical use as medical waste containers, even after heat aging treatment. On the other hand, the medical waste container according to the comparative example had Charpy impact strength sufficient for practical use as a medical waste container before the heat aging treatment, but the strength decreased after the heat aging treatment.

[0095] The same tendency as above was observed when inorganic powders other than calcium carbonate (talc, etc.) were used, but the most stable antibacterial properties were observed when calcium carbonate was used.

[0096] When calcium carbonate was used, there was no difference in the tendency whether heavy calcium carbonate or light calcium carbonate was used. However, heavy calcium carbonate (particularly, calcium carbonate with an average particle size of 0.7 μm to 6.0 μm as measured by the air permeability method in accordance with JIS M-8511) was found to have stable dispersibility despite its low cost, and was able to suppress variation in antibacterial properties during mass production of containers.

Claims

1. A container for medical waste, comprising: The medical waste container includes a container body and a lid body removably attached to the container body, The medical waste container is made of a resin composition, The resin composition contains a thermoplastic resin and an inorganic substance powder in a mass ratio of 50:50 to 10:90, the thermoplastic resin includes a polyolefin resin, The inorganic powder is 50% by mass or more based on the resin composition, The inorganic powder is calcium carbonate. Containers for medical waste.

2. A container for medical waste, comprising: The medical waste container is an injection molded product, The medical waste container is made of a resin composition, The resin composition contains a thermoplastic resin and an inorganic substance powder in a mass ratio of 50:50 to 10:90, the thermoplastic resin includes a polyolefin resin, The inorganic powder is 50% by mass or more based on the resin composition, The inorganic powder is calcium carbonate. Containers for medical waste.

3. 3. The medical waste container according to claim 1, wherein the calcium carbonate is ground calcium carbonate.

4. 3. The medical waste container according to claim 1, wherein the inorganic powder has an average particle size of 0.7 μm or more and 6.0 μm or less, as measured by an air permeation method according to JIS M-8511.

5. 3. The medical waste container according to claim 1, wherein a part of the inorganic powder is exposed on an outermost surface of the medical waste container.

6. 6. The medical waste container according to claim 5, wherein a ratio of an exposed area of ​​the inorganic powder to an area of ​​the outermost surface is 25% or more and 75% or less.

7. 2. The medical waste container according to claim 1, wherein the container body and the lid are engageable with each other.

8. The medical waste container according to claim 1 , wherein the container body has an expandable structure.

9. The medical waste container according to claim 1 , wherein the container body and / or the lid are provided with a handle.

10. 3. The medical waste container according to claim 1, further comprising a bag disposed inside the medical waste container.

Images