Container for powder and package

Abstract

To provide a container 100 for powder and a package 200 that can more reliably prevent spillage of contents.SOLUTION: A container 100 for powder has a container body 10 that stores powder, and a lid body 50. The container body 10 includes: a bottom 20; and a peripheral wall 30 rising from an outer edge of the bottom 20. The peripheral wall 30 includes: a first inner peripheral wall 31 rising from the bottom 20 on an inner peripheral side of the peripheral wall 30 and having a diameter smaller than that of the lid body 50; and a second inner peripheral wall 35 having a diameter larger than that of the lid body 50 and connecting with the first inner peripheral wall 31 with a step 33; and a caulking portion 37 arranged on an end of the opposite side to the bottom 20 and folded to the inner peripheral side of the container body 10. The container body 10 and the lid body 50 do not have ventilation or vent holes, and the lid body 50 is arranged between the step 33 and the caulking portion 37 while keeping a gap G (G1, G2, G3) with the container body 10.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a container and a package for powder or granular material. [Background technology]

[0002] Conventionally, a lid that is crimped to the opening of a container to prevent the contents of the container from spilling has been known. For example, Patent Document 1 describes an oxygen absorbent package formed by storing an oxygen absorbent in a breathable container, the breathable container being a breathable canister container having powder barrier properties, the breathable canister container being composed of a bottomed tube that can maintain its shape and a lid made of a breathable isolation film having an air permeability of 20 to 4000 seconds at 25°C. According to the oxygen absorbent package described in Patent Document 1, the oxygen absorbent is placed in a canister container that maintains a constant shape, thereby preventing accidental ingestion or drinking.

[0003] Also, for example, Patent Document 2 describes an absorbent-containing container that contains an absorbent that absorbs gas, the absorbent-containing container having a lid and a cylindrical container body with a bottom and an opening on the top surface closed by the lid, the lid is fitted into the opening with its outer periphery bent upward and in contact with the inner periphery layer of the container body, the upper end of the container body is bent from above the lid toward the lid to grip the outer periphery of the lid, and a paper layer is used for at least one of the inner periphery layer of the container body or the inner layer of the lid. According to the absorbent-containing container described in Patent Document 2, it is possible to realize a low-cost absorbent-containing container that can contain an absorbent that expands in response to gas while ensuring ventilation between the container and the outside, and can also contain an absorbent that has a small diameter or that becomes smaller in diameter without leaking. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2003-312729 A [Patent Document 2] International Publication No. 2014 / 203770 Summary of the Invention [Problem to be solved by the invention]

[0005] The containers described in Patent Documents 1 and 2 use a lid made of a breathable isolation film to ensure breathability between the container and the outside, and a paper layer is used in at least one of the inner peripheral layer of the container body and the inner layer of the lid.

[0006] However, in the containers described in Patent Documents 1 and 2, the strength of the lids, etc. was not considered, and vibration during transportation of the containers could cause the containers to collide with each other or the contents of the containers against the lids or the inner layer of the container, resulting in deformation of the lids or the inner layer of the container or the lids coming off, which could result in the contents spilling out.

[0007] An object of the present invention is to provide a container and a package for powder or granular material that can more reliably prevent the contents from spilling. [Means for solving the problem]

[0008] The inventors discovered that the above problem could be solved by having the container body and lid not be breathable or have air holes, and by positioning the lid with a gap between it and the container body, and thus completed the invention.

[0009] That is, the present invention is as follows. <1> A container for powdered or granular material comprising a container body for containing powdered or granular material and a lid, wherein the container body comprises a bottom and a peripheral wall rising from an outer edge of the bottom, the peripheral wall comprising a first inner peripheral wall rising from the bottom on an inner periphery of the peripheral wall and having a smaller diameter than the lid, a second inner peripheral wall being larger in diameter than the lid and connected to the first inner peripheral wall with a step, and a crimped portion disposed at an end opposite the bottom and bent toward the inner periphery of the container body, the container body and the lid having no ventilation or air holes, and the lid being disposed between the step and the crimped portion while having a gap between them. <2> An extension line of the bent end of the crimping portion intersects with the second inner circumferential wall portion; <1> A container for powder or granular material according to claim 1. <3> The cover is flat. <1> or <2> A container for powder or granular material according to claim 1. <4> The peripheral wall portion has a larger diameter toward the opposite side of the bottom portion. <1> ~ <3> 13. A container for powder or granular material according to any one of the preceding claims. <5> In a cross-sectional view, an extension line extending in a radial direction from an intersection of a diagonal line connecting an inner diameter side end point of the step and an outermost point of the inner diameter of the bottom portion is located from a center of the first inner circumferential wall portion toward the bottom portion in an axial direction. <1> ~ <4> 13. A container for powder or granular material according to any one of the preceding claims. <6> When a force is applied to the lid from the direction opposite to the bottom, the force at which the lid falls off or is deformed is 2.5 MPa or more. <1> ~ <5> 13. A container for powder or granular material according to any one of the preceding claims. <7> The powder or granule is a desiccant and / or an oxygen absorber. <1> ~ <6> 13. A container for powder or granular material according to any one of the preceding claims. <8> a first inner peripheral wall portion rising from the bottom on an inner periphery side of the peripheral wall portion and having a smaller diameter than the lid portion; a second inner peripheral wall portion rising from the bottom on an inner periphery side of the peripheral wall portion and having a larger diameter than the lid portion and connected to the first inner peripheral wall portion with a step; and a crimped portion disposed at an end portion opposite the bottom and bent toward the inner periphery side of the container body portion; <9> The filling rate of the powder or granule is 85% or less. <8> The packaging body described in <10> The powder or granule is a desiccant and / or an oxygen absorber. <8> or <9> The packaging body described in Effect of the Invention

[0010] According to the present invention, it is possible to provide a container and a package for powder or granular material that can more reliably prevent the contents from spilling. [Brief description of the drawings]

[0011] [Figure 1] FIG. 2 is a vertical cross-sectional view illustrating the configuration of a powder or granular material container according to the present embodiment. [Diagram 2] 3 is a bottom view illustrating the configuration of a powder or granular material container according to the embodiment; FIG. [Diagram 3] FIG. 4 is an enlarged partial cross-sectional view for explaining a gap in a container for powder or granular material according to the embodiment. [Figure 4] 1 is a longitudinal sectional view illustrating a configuration of a packaging body according to the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Preferred embodiments for carrying out the present invention will be described below with reference to the drawings. Note that the following embodiments do not limit the inventions according to the claims, and not all of the combinations of features described in the embodiments are essential to the solution of the invention.

[0013] First, the configuration of a powder or granular material container 100 according to this embodiment will be described with reference to Figures 1 to 3. Here, Figure 1 is a vertical cross-sectional view illustrating the configuration of the powder or granular material container according to this embodiment, Figure 2 is a bottom view illustrating the configuration of the powder or granular material container according to this embodiment, and Figure 3 is an enlarged partial cross-sectional view for explaining gaps in the powder or granular material container according to this embodiment.

[0014] [Powder container 100] As shown in Figures 1 and 3, the powdered or granular material container 100 of this embodiment comprises a container body 10 that contains powdered or granular material, and a lid body 50. The container body 10 comprises a bottom 20 and a peripheral wall portion 30 that rises from the outer edge of the bottom 20. The peripheral wall portion 30 comprises a first inner peripheral wall portion 31 that rises from the bottom 20 on the inner side of the peripheral wall portion 30 and has a smaller diameter than the lid body 50, a second inner peripheral wall portion 35 that has a larger diameter than the lid body 50 and is connected to the first inner peripheral wall portion 31 with a step 33, and a crimped portion 37 that is arranged at the end opposite the bottom 20 and is bent toward the inner side of the container body 10. The container body 10 and the lid body 50 are not breathable or have air holes. Furthermore, the lid body 50 is arranged between the step 33 and the crimped portion 37 while having a gap G (G1, G2, G3) between it and the container body 10.

[0015] As shown in Figs. 1 and 3, the container body 10 is the main body of the container that contains powder or granular material. The container body 10 has no breathability or vent holes. Here, "not having breathability" means, in more detail, that the amount of air passing through a test piece measured in accordance with JIS L 1096:2010 is equal to or less than the measurement limit, or that the oxygen permeability measured using an oxygen permeability measuring device (for example, "OX-TRAN2 / 22L" manufactured by MOCON) under conditions of 25°C, N2 90% RH, and O2 60% RH is equal to or less than 200 mL / (m 2This means that the unit is less than 1000 Hz (day atm).

[0016] 1 and 3, the lid body 50 is a part that serves as a lid for the powder / granular material container 100, and like the container body 10, does not have breathability or air holes. The lid body 50 according to this embodiment is configured as a flat, circular plate-like member, although not particularly limited thereto. With this configuration, the lid body 50 can be more easily positioned between the step 33 and the crimping portion 37 while having a gap G (G1, G2, G3) between the container body 10 and the lid body 50.

[0017] The powder / granular material container 100 is not particularly limited, but a lid body 50 can be used that has a force (stress of the lid body) of 2.5 MPa or more at which the lid body 50 falls off or deforms when a force is applied to the lid body 50 from the direction opposite the bottom 20 (the upper side in normal use). Such a lid body 50 is useful because it can withstand shocks caused by vibrations during transportation of the powder / granular material container 100. The stress of the lid body can be measured by the method described in the examples.

[0018] As shown in Fig. 1 and Fig. 2, the bottom 20 according to this embodiment has a circular shape and is arranged concentrically with the container 100 for powdered or granular material. The bottom 20 according to this embodiment has, at its center, a convex portion 21 that protrudes toward the crimping portion 37 (lid 50) and has a circular shape in a plan view, and a concave portion 23 that is recessed toward the crimping portion 37 (lid 50) and has a circular shape in a bottom view. The convex portion 21 and the concave portion 23 according to this embodiment are also arranged concentrically with the bottom 20 and the container 100 for powdered or granular material. That is, in this embodiment, the convex portion 21, the concave portion 23, the bottom 20, and the container 100 for powdered or granular material are arranged concentrically.

[0019] The bottom portion 20 having the convex portion 21 and the concave portion 23 has an advantage that the container 100 for powder or granular material can be easily molded.

[0020] As shown in Fig. 1, the convex portion 21 is configured so that the center of the circle protrudes highest toward the crimping portion 37 (lid body 50). On the other hand, the concave portion 23 is configured so that the center of the circle recesses the deepest toward the crimping portion 37 (lid body 50). In this embodiment, the diameter of the circle of the convex portion 21 is larger than the diameter of the circle of the concave portion 23. This configuration can further improve the moldability of the container.

[0021] As shown in Fig. 1, the bottom 20 according to this embodiment has legs 25 arranged upright in the opposite direction to the crimping portion 37 (lid 50). As shown in Fig. 2, the legs 25 according to this embodiment are arranged on the bottom 20 protruding in the opposite direction to the crimping portion 37 (lid 50) so as to have a circular shape when viewed from the bottom. By having the legs 25, the powder / granular material container 100 has excellent stability, and the work efficiency can be improved when manufacturing the package 200 described below.

[0022] The peripheral wall 30 is configured to rise from the outer edge of the bottom 20. As shown in Fig. 1, the bottom 20 and the peripheral wall 30 may be connected with a curved line. With this configuration, as described below, it is possible to better withstand the pressing force generated when the crimping portion 37 is crimped. When the bottom 20 and the peripheral wall 30 are connected with a curved line, the part of the maximum angle of the curve on the inside of the container 100 for powder or granular material is set as the outermost point 20A of the inner diameter of the bottom 20, which will be described later.

[0023] 1, the peripheral wall portion 30 according to this embodiment is configured so that the diameter increases toward the opposite side of the bottom portion 20. This configuration has the advantages of making it easy to put powder or granular material into the powder or granular material container 100 and providing excellent stability.

[0024] The peripheral wall portion 30 is composed of a first inner peripheral wall portion 31 having a smaller diameter than the lid body 50, a second inner peripheral wall portion 35 having a larger diameter than the lid body 50, and a crimping portion 37 that is arranged at the end opposite the bottom 20 and is bent toward the inner peripheral side of the container main body portion 10.

[0025] 1, the first inner circumferential wall 31 according to this embodiment is configured to rise from the outermost point 20A of the bottom 20 on the inner circumferential side of the circumferential wall 30 and to have a diameter smaller than the diameter of the lid 50. With this configuration, it is possible to prevent the lid 50 from dropping into the container body 10.

[0026] The second inner circumferential wall portion 35 is connected to the first inner circumferential wall portion 31 via a step 33, and is configured to have a diameter larger than the diameter of the lid body 50. With this configuration, the outer end portion of the lid body 50 is likely to be disposed with a gap G2 between it and the second inner circumferential wall portion 35, as shown in FIG.

[0027] The inner diameter of the second inner circumferential wall portion 35 can be configured so as to be the same as the outer diameter of the bottom portion 20. With such a configuration, a container with excellent handleability can be formed.

[0028] The step 33 is configured to have a predetermined length so that the lid body 50 does not fall into the container body 10. The step 33 according to this embodiment is disposed so as to be substantially parallel to the bottom 20, as shown in Fig. 1. With this configuration, when the lid body 50 is flat, it is easy to place the lid body 50 with a gap G1 therebetween, as shown in Fig. 3.

[0029] The crimping portion 37 is disposed at the end opposite to the bottom portion 20 and is bent toward the inner circumference of the container body 10. The crimping portion 37 according to the present embodiment is configured to have the same thickness (diameter) as the second inner circumferential wall portion 35, but is not particularly limited as long as the lid body 50 can be disposed with a gap G3 therebetween, and the diameter (thickness) of the crimping portion 37 may be smaller or larger than the diameter (thickness) of the second inner circumferential wall portion 35.

[0030] 3, in this embodiment, an extension line E2 of the bent end portion 37A of the crimping portion 37 is configured to intersect with the second inner circumferential wall portion 35. With this configuration, the lid body 50 can be easily disposed with a gap G (G1, G2, G3) between the lid body 50 and the step 33.

[0031] 1, in a cross-sectional view, an extension line E1 extending radially from an intersection point of a diagonal line D connecting an inner diameter side end point 33A of the step 33 and an outermost point 20A of the inner diameter of the bottom portion 20 can be configured to be located axially from the center of the first inner circumferential wall portion 31 toward the bottom portion 20. With this configuration, when the crimping portion 37 is crimped, the crimping portion 37 is less likely to wrinkle and twist, and the container 100 for powder or granular material has an excellent appearance.

[0032] The total length of the second inner peripheral wall portion 35 and the crimped portion 37, which is perpendicular to the normal manufacturing direction, is not particularly limited, but may be 1 / 7 or more of the length of the peripheral wall portion 30, may be 29 / 200 or more, may be 59 / 400 or more, or may be 3 / 20 or more. The total length of the second inner peripheral wall portion 35 and the crimped portion 37 is not particularly limited, but may be 1 / 8 or more of the outer diameter of the bottom portion 20, may be 1 / 7 or more, may be 1 / 6 or more, or may be 1 / 5 or more. With this configuration, when the crimped portion 37 is crimped, wrinkles are less likely to occur in the crimped portion 37, and twisting can be suppressed, so that the container for powder or granular material 100 has excellent appearance.

[0033] The total length of the second inner circumferential wall portion 35 and the crimped portion 37 is not particularly limited, but may be 3 mm or more and 6 mm or less. The thickness of the second inner circumferential wall portion 35 and the crimped portion 37 is not particularly limited, but may be 0.1 mm or more and 0.8 mm or less.

[0034] The size of the gaps G (G1, G2, G3) is not particularly limited as long as the powder does not spill and the function of the powder is not impaired, and is appropriately changed depending on the size, type, etc. of the powder. The size of the gaps G (G1, G2, G3) is not particularly limited, but can be, for example, 10 μm or more, 20 μm or more, and 100 μm or less, 80 μm or less.

[0035] The material of the container body 10 and the lid 50 is not particularly limited as long as it is breathable and does not have air holes, but may be metal, alloy, glass, polyolefin resin, polyester resin, polyamide resin, polyvinyl alcohol resin, ethylene-vinyl alcohol copolymer resin, chlorine-based resin, etc.

[0036] Examples of polyolefin resins include various polyethylenes such as high density polyethylene, medium density polyethylene, low density polyethylene, linear low density polyethylene, very low density polyethylene, and polyethylene produced by a metallocene catalyst, and polypropylenes such as polystyrene, polymethylpentene, propylene homopolymer, propylene-ethylene block copolymer, and propylene-ethylene random copolymer, which can be used alone or in combination. Furthermore, these polyolefin resins may contain, as necessary, ethylene-vinyl acetate copolymer, ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-methyl methacrylate copolymer, thermoplastic elastomer, etc.

[0037] Examples of polyester resins include aromatic polyesters, aliphatic polyesters, etc. Examples of polyamide resins include aromatic polyamides, aliphatic polyamides, etc. Specific examples of these include polymetaxylylene adipamide (e.g., MX nylon, manufactured by Mitsubishi Gas Chemical Co., Inc.), nylon-6, nylon-6,6, nylon-6,12, etc.

[0038] Examples of polyvinyl alcohol resins include resins obtained by saponifying vinyl ester polymers or copolymers of vinyl esters and other monomers using an alkali catalyst. The degree of saponification of the vinyl ester component of the polyvinyl alcohol resin is not particularly limited, but is preferably 90% or more, more preferably 95% or more, and even more preferably 99% or more. The polyvinyl alcohol resin may be a blend (mixture) of two or more polyvinyl alcohol resins having different degrees of saponification. Examples of ethylene-vinyl alcohol copolymer resins include resins obtained by saponifying ethylene-vinyl ester copolymers. Among them, ethylene-vinyl alcohol copolymers having an ethylene content of 5 to 60 mol% and a saponification degree of 85% or more are preferred. The ethylene content of the ethylene-vinyl alcohol copolymer resin is not particularly limited, but the lower limit is preferably 20 mol% or more, more preferably 25 mol% or more. The upper limit of the ethylene content is preferably 55 mol% or less, more preferably 50 mol% or less. Furthermore, the degree of saponification of the vinyl ester component is not particularly limited, but is preferably 85% or more, more preferably 90% or more, and even more preferably 99% or more.

[0039] Examples of chlorine-based resins include polyvinylidene chloride, block copolymers and graft copolymers mainly made of vinyl chloride, and polymer blends mainly made of vinyl chloride resin. Examples of comonomers copolymerized with vinyl chloride include vinyl acetate, vinylidene chloride, acrylic acid, methacrylic acid and esters thereof, acrylonitriles, olefins such as ethylene and propylene, maleic acid and its anhydride, etc.

[0040] The powdered material contained in the container body 10 may be a desiccant and / or an oxygen absorbent. The desiccant and oxygen absorbent may be conventionally known ones, and may be ones that expand by reacting with gas. The desiccant is not particularly limited as long as it absorbs moisture, and examples thereof include silica gel, quicklime (calcium oxide), calcium chloride, diphosphorus pentoxide, aluminum oxide, magnesium oxide, and barium oxide. The oxygen absorbent is not particularly limited as long as it absorbs oxygen, and examples thereof include metal powders such as iron powder, reducing inorganic substances such as iron compounds, reducing organic substances such as polyhydric phenols, polyhydric alcohols, unsaturated fatty acid compounds, ascorbic acid or salts thereof, resin compositions containing resins and / or oligomers having carbon-carbon unsaturated bonds and transition metal catalysts, or oxygen absorbent compositions containing metal complexes or the like as the main agent for oxygen absorption reaction, and may be an iron-based oxygen scavenger containing iron powder as the main agent. Only one of the desiccant and the oxygen absorbent may be used, or both the desiccant and the oxygen absorbent may be used. The desiccants and oxygen absorbents may be used alone or in combination of two or more.

[0041] In the powdered or granular material container 100 according to this embodiment, the lid 50 has gaps G (G1, G2, G3) between it and the container body 10, and is disposed between the step 33 and the crimped portion 37, thereby more reliably preventing spillage of the contents while ensuring ventilation to the outside of the powdered or granular material container 100. Conventionally, ventilation has been ensured by making the inner layer of the multi-layered container body a paper layer, or by using a lid made of a breathable material, thereby ensuring ventilation that allows the contents, such as a desiccant or oxygen absorber, to come into contact with the atmosphere outside the container. On the other hand, the powdered or granular material container 100 of the present invention has the container body 10 and the lid 50 made of a material that is not breathable but has strength, and a small gap is provided between the container body 10 and the lid 50 so that the powdered or granular material A does not spill out and the function of the powdered or granular material A is not impaired. This ensures sufficient breathability, provides excellent strength against impacts that may occur due to vibrations during transportation of the container, and further provides the excellent effect of preventing the powdered or granular material A contained therein from spilling out.

[0042] The configuration of the powdered or granular material container 100 according to this embodiment has been described above. Next, the packaging body 200 will be described with reference to FIG. 4. FIG. 4 is a vertical cross-sectional view illustrating the configuration of the packaging body according to this embodiment. Note that the same or similar configurations as those in the above-described embodiment may be denoted by the same reference numerals and descriptions thereof may be omitted. The packaging body 200 according to this embodiment may be formed using the above-described powdered or granular material container 100.

[0043] [Package 200] As shown in FIG. 4, a package 200 according to this embodiment is a container 110 containing powdered or granular material A. The container 110 includes a container body 10 for containing the powdered or granular material A, and a lid 50. The container body 10 includes a bottom 20 and a peripheral wall 30 rising from the outer edge of the bottom 20. The peripheral wall 30 includes a first inner peripheral wall 31 rising from the bottom 20 on the inner peripheral side of the peripheral wall 30 and having a smaller diameter than the lid 50. The container body 10 and the lid body 50 are provided with a second inner wall portion 35 having a larger diameter than the first inner wall portion 31 and connected to the first inner wall portion 31 with a step 33, and a crimped portion 37 arranged at the end opposite the bottom 20 and bent toward the inner circumference of the container body portion 10, wherein the container body portion 10 and the lid body 50 are not breathable and have no air holes, and further, the lid body 50 is arranged between the step 33 and the crimped portion 37 while having a gap (see Figure 3) between the container body portion 10 and the lid body 50.

[0044] In the package 200 according to this embodiment, the powdered or granular material A contained in the container body 10 can be one of the powdered or granular material exemplified in the above-mentioned container 100 for powdered or granular material, and may be an iron-based oxygen absorber containing iron powder as a main component. Either a desiccant or an oxygen absorbent may be used, or both a desiccant and an oxygen absorbent may be used. The desiccant and the oxygen absorbent may be used alone or in combination of two or more kinds.

[0045] In the package 200 according to the present embodiment, the filling rate of the powdered or granular material A can be set to 85% or less. In the conventional package, the powdered or granular material is densely packed, and the lid body is supported by the powdered or granular material to prevent the powdered or granular material from spilling out. In the package 200 according to the present embodiment, the container body 10 and the lid body 50 can be prevented from being deformed or the lid from coming off due to the collision between the containers 110 or between the powdered or granular material A, which is the content of the container 110, and the lid body 50 caused by vibration during transportation of the container 110, and therefore, there is no need to support the lid body 50 by the powdered or granular material A. Therefore, the package 200 can prevent the powdered or granular material A from spilling out even if the container body 10 is not densely packed with the powdered or granular material A. In other words, the package 200 can be filled with various amounts of the powdered or granular material A, from a densely packed amount to a small amount, and there is no need to manufacture the package 200 according to the amount of the powdered or granular material A to be filled, which is economical.

[0046] In the package 200 according to the present embodiment, an iron-based oxygen absorber can be particularly suitably used as the powdered or granular material A. Since the iron-based oxygen absorber expands when it absorbs oxygen, it is necessary to provide a certain amount of space within the package. However, when a space is provided within the package, the containers collide with each other or with the powdered or granular material A (contents of the container) and the lid due to vibration during transportation of the package, etc., which can cause deformation of the container body and the lid, or cause the lid to come off, resulting in the iron-based oxygen absorber powder (contents) spilling out. In response to this problem, the configuration of the package 200 of the present invention can prevent the iron-based oxygen absorber powder from spilling out even when an iron-based oxygen absorber is stored as the powdered or granular material A.

[0047] Although the preferred embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the scope described in the above embodiments. Various modifications and improvements can be made to the above embodiments.

[0048] For example, in the above-described embodiment, the bottom 20 of the powder or granular material container 100 is configured to have the convex portion 21, the concave portion 23, and the leg portion 25, but it is not necessary to have the convex portion 21, the concave portion 23, and the leg portion 25, and the shapes of the convex portion 21, the concave portion 23, and the leg portion 25 are not limited to the above-described embodiment.

[0049] Further, for example, in the above-described embodiment, the bottom portion 20 and the peripheral wall portion 30 of the powder or granular material container 100 are connected to each other along a curved line, but they do not necessarily have to be connected to each other along a curved line.

[0050] Furthermore, for example, in the above-described embodiment, the peripheral wall portion 30 is configured so that the diameter increases toward the opposite side of the bottom portion 20, but the diameter of the peripheral wall portion 30 may be constant.

[0051] Also, for example, in the above-described embodiment, the powder / granular material container 100 is configured to have a cylindrical shape to prevent the lid body 50 from falling off, but as long as the lid body 50 will not fall off, it may be configured to have a hollow polygonal shape, such as a hollow rectangular shape. EXAMPLES

[0052] The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples in any way.

[0053] [Measurement method] (Stress of the lid) As shown in Figure 1, the lid is crimped onto the container, and the cross-sectional area C [mm 2 ] force was applied, and the load P [N] at which the lid fell off or deformed was measured three times. The stress σ [MPa] of the lid was calculated using the formula below, and the average value was taken as the stress of the lid. Stress of the lid σ=P / C

[0054] (oxygen absorption) The oxygen absorption performance of the oxygen absorber of this embodiment is evaluated by the oxygen absorption amount. The oxygen absorption amount refers to the amount of oxygen loss in the bag, which is derived from the oxygen concentration in the bag measured after sealing an excess amount of air and the oxygen absorber together in an oxygen barrier bag and storing it for a certain period of time. After producing the packages of the examples and comparative examples, they were placed in an aluminum-deposited oxygen-impermeable bag together with 1500 mL of air, sealed, and stored at 40°C for 7 days. The oxygen concentration in the bag was measured, and the oxygen absorption amount (unit: mL) was calculated.

[0055] Example 1 A polypropylene powder container (see FIG. 1) having a peripheral wall length of 20 mm, a peripheral wall thickness of 1.0 mm, a total length of the second inner peripheral wall and the crimped portion of 4.0 mm, a thickness of the second inner peripheral wall and the crimped portion of 0.5 mm, and an outer diameter of the bottom of 14 mm was filled with 1.72 g of iron-based oxygen absorber so that the filling rate was 80%. The iron-based oxygen absorber was prepared in the following manner. An aqueous solution in which 20 g of calcium chloride dihydrate was dissolved in 20 g of water was added dropwise to 48 g of diatomaceous earth ("CG-1C" manufactured by Isolite Kogyo Co., Ltd.) while mixing, and the mixture was uniformly impregnated. Next, 1.1 g of activated carbon and 1.4 g of gypsum were added and mixed to obtain 91 g of moisture donor (A). 54 parts by mass of iron powder (average particle size 100 μm) and 46 parts by mass of the moisture donor (A) were mixed to obtain an iron-based oxygen absorber as an oxygen absorber composition which is a powder mixture. The filling rate of the iron-based oxygen absorber was set to about 85%, and a flat polypropylene sheet with a thickness of 600 μm was placed as a lid on the step of the container body. Using a heating tool, the heating temperature was 100°C, the crimping time was 1 second, and the crimping pressure was 9.1 × 10 5 Pa±0.6×10 5 The crimped portion was crimped under the condition of 1.0 Pa to produce a package (see Figure 4). The extension line of the folded end of the crimped portion intersected with the second inner peripheral wall portion (see Figures 1 and 2). The stress σ of the lid was 3.67 MPa, and the oxygen absorption amount was 167 mL.

[0056] Comparative Example 1 Except for changing the heating temperature of the lid to 180° C. and the crimping time to 5 seconds, a package was produced in the same manner as in Example 1. The stress σ of the lid was 5.23 MPa, and the oxygen absorption amount was 9 mL.

[0057] Comparative Example 2 The cover is 533μm thick and weighs 382g / m 2 Except for changing the paper used, a package was produced in the same manner as in Example 1. The stress σ of the lid was 1.44 MPa, and the oxygen absorption amount was 163 mL.

[0058] According to the present invention, the contents can be more reliably prevented from spilling while ensuring breathability through the gaps G (G1, G2, G3) between the outside of the powder / granular material container 100. In Comparative Example 1, the container body and the lid were heat-sealed, and there was no gap G (G1, G2, G3) between the container body and the lid, so the oxygen absorption amount was low and the content was not breathable. In Comparative Example 2, the lid was made of paper, so the stress of the lid was poor. Therefore, the container was poor in strength against impacts during transportation, etc., and there is a possibility that the lid may deform or come off, causing the powder / granular material to spill, especially when the filling rate of the powder / granular material is low. [Industrial Applicability]

[0059] The powder / granular material container of the present invention can ensure ventilation to the outside of the powder / granular material container 100 while more reliably preventing the powder / granular material from spilling even if the powder / granular material content is not packed tightly, and is therefore suitable for use as a package for a desiccant and / or oxygen absorber. [Explanation of symbols]

[0060] 100: Powder container, 110: Container 200: Packaging body, 10: Container body, 20: bottom portion, 20A: outermost point of the inner diameter of the bottom portion, 21: convex portion, 23: concave portion, 25: leg portion, 30: peripheral wall portion, 31: first inner peripheral wall portion, 33: step, 33A: inner diameter side end point of step, 35: second inner peripheral wall portion, 37: crimped portion, 37A: crimped portion end portion 50: Lid body, A: Powder, D: Diagonal, E1, E2: Extension, G (G1, G2, G3): Gap

Claims

1. A powder / granular material container comprising a container body for accommodating powder / granular material and a lid, The container body is The bottom and a peripheral wall portion rising from the outer edge of the bottom portion; Equipped with The peripheral wall portion is a first inner peripheral wall portion that rises from the bottom portion on the inner peripheral side of the peripheral wall portion and has a diameter smaller than that of the lid body; a second inner circumferential wall portion having a diameter larger than that of the lid body and connected to the first inner circumferential wall portion with a step; a crimping portion disposed at an end opposite to the bottom portion and bent toward the inner periphery of the container body; Equipped with The container body and the lid are not breathable or have air vents, and The lid body is disposed between the step and the crimped portion while leaving a gap between the lid body and the container body.

2. The container for powder or granular material according to claim 1 , wherein an extension line of the bent end of the crimped portion intersects with the second inner circumferential wall portion.

3. 3. The container for powder or granular material according to claim 1, wherein the lid is flat.

4. 3. The container for powder or granular material according to claim 1, wherein the peripheral wall portion has a diameter that increases toward the opposite side of the bottom portion.

5. 3. A container for powder or granular material as described in claim 1 or 2, wherein, in a cross-sectional view, an extension line extending radially from the intersection of a diagonal line connecting the inner diameter end point of the step and the outermost point of the inner diameter of the bottom portion is located axially from the center of the first inner wall portion toward the bottom portion.

6. 3. The container for powder or granular material according to claim 1, wherein when a force is applied to the lid from the direction opposite to the bottom, the force at which the lid falls off or is deformed is 2.5 MPa or more.

7. 3. The container for powder or granular material according to claim 1, wherein the powder or granular material is a desiccant and / or an oxygen absorber.

8. A package in which powder or granular material is contained in a container, The container includes a container body that accommodates powder and granular material, and a lid body, The container body is The bottom and a peripheral wall portion rising from the outer edge of the bottom portion; Equipped with The peripheral wall portion is a first inner peripheral wall portion that rises from the bottom portion on the inner peripheral side of the peripheral wall portion and has a diameter smaller than that of the lid body; a second inner circumferential wall portion having a diameter larger than that of the lid body and connected to the first inner circumferential wall portion with a step; a crimping portion disposed at an end opposite to the bottom portion and bent toward the inner periphery of the container body; Equipped with The container body and the lid are not breathable or have air vents, and The package, wherein the lid body is disposed between the step and the crimped portion while leaving a gap between the lid body and the container body.

9. 9. The package according to claim 8, wherein the filling rate of the powder or granular material is 85% or less.

10. 10. The package according to claim 8, wherein the powder or granular material is a desiccant and / or an oxygen absorber.

Images