Package and packaging box

Abstract

To provide a package that is superior in after-storage handling of a metal iodide particulate matter.SOLUTION: A package according to the present invention comprises a bag formed of an aluminum laminate film and a metal iodide particulate matter enclosed in the bag.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a package and a packaging box. [Background technology]

[0002] Various developments have been made so far regarding packages containing metal iodide powder. For example, the technology described in Patent Document 1 is known as this type of technology. Patent Document 1 describes storing metal iodide powder in a low-density polyethylene packaging material (paragraph 0003 of Patent Document 1, etc.). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2009-137824 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, as a result of investigations by the present inventors, it was found that there is room for improvement in terms of handleability of the metal iodide powder after it has been stored in the polyethylene packaging material described in Patent Document 1 above. [Means for solving the problem]

[0005] After further investigation, the inventors found that storing metal iodide powder in a bag made of aluminum laminate film can suppress the deterioration of handleability of the metal iodide powder after storage, compared to storing it in a polyethylene bag, and thus completed the present invention.

[0006] According to the present invention, A bag made of aluminum laminate film, and a metal iodide powder sealed inside the bag. A package is provided.

[0007] Further, according to the present invention, A packaging box is provided, comprising the above-mentioned packaging body and a packaging container for accommodating the packaging body. Effect of the Invention

[0008] According to the present invention, there are provided a package for metal iodide powder that is easy to handle after storage, and a packaging box including the package. [Brief description of the drawings]

[0009] [Figure 1] 1A and 1B are a side view and a cross-sectional view, respectively, each showing a schematic example of a configuration of a packaging body according to the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In all drawings, similar components are given similar reference numerals and their explanations will be omitted as appropriate. Also, the drawings are schematic diagrams and do not correspond to the actual dimensional ratios.

[0011] The packaging body of this embodiment will be described.

[0012] The package of the present embodiment includes metal iodide powder and a bag made of an aluminum laminate film, and is configured so that the metal iodide powder is sealed inside the bag.

[0013] By storing the metal iodide powder in the package of the present embodiment, deterioration in the handleability of the metal iodide powder can be suppressed. The metal iodide powder in such a package has excellent fluidity even when opened after a predetermined storage period, and therefore the productivity of the manufacturing process using the same can be improved. Furthermore, such a package is excellent for long-term storage in a relatively high temperature and high humidity environment, and is also suitable for overseas transportation that takes a route near the equator.

[0014] <Metal iodide powder> The metal iodide in the metal iodide powder includes, for example, an alkali metal iodide and / or an alkaline earth metal iodide, specifically, any one selected from the group consisting of potassium iodide, lithium iodide, sodium iodide, rubidium iodide, cesium iodide, calcium iodide, strontium iodide, and aluminum iodide. Among these, it is preferable to include potassium iodide.

[0015] Metal iodides are useful as raw materials and ingredients for reagents used in chemical reactions and analyses, medical ingredients such as expectorants, diuretics, and denaturants, photographic emulsions, single crystal lenses for scintillation counters, nylon fiber additives, liquid crystal displays (LCDs), and polarizing films.

[0016] The metal iodide powder may be a powder (powder) having a particle diameter of 1000 μm or less as measured in accordance with JIS K0069, a sieving test method for chemical products, or may be a particle diameter of more than 1000 μm. That is, the metal iodide powder is composed of powder and / or granules, and may be composed partly or entirely of powder. Specifically, the metal iodide powder is composed of powder such that when sieved through a sieve with an opening of 1000 μm, the sieve-passing portion is, for example, 80% by weight or more, preferably 90% by weight or more, and more preferably 95% by weight or more of the total.

[0017] One example of a method for producing a powder of a metal iodide is to concentrate an aqueous solution of a metal iodide such as an aqueous solution of potassium iodide in a crystallizer to precipitate crystals of the metal iodide, and then to separate the crystals of the metal iodide from the solution and dry the separated metal iodide. Also, a method of obtaining a powder of metal iodide using a fluidized bed drying method can be used. Specifically, a spray fluidized bed granulation drying method is used in which an aqueous solution of metal iodide is dried and granulated using a spray fluidized bed granulation dryer. In the spray fluidized bed granulation dryer, an aqueous solution of metal iodide is usually sprayed by an appropriate method, and the water in the aqueous solution is evaporated and exhausted by hot air, and the precipitated metal iodide is granulated into powder particles. The hot air temperature is desirably equal to or higher than the boiling point of the solvent, such as water, contained in the aqueous metal iodide solution, and may be, for example, about 100 to 280°C, and is desirably 130 to 180°C. Thereafter, classification such as sieving, crushing, pulverization, etc. may be carried out as necessary. By the above steps, a powder of metal iodide having a particle size of 1000 μm or less is obtained.

[0018] The metal iodide powder may have a metal iodide content of, for example, 90% by mass or more, preferably 95% by mass or more, or 99% by mass or more, based on 100% by mass of the powder. The metal iodide powder may contain general additives such as an anti-caking agent, and may tolerate unavoidable trace impurities that are mixed in during the manufacturing process.

[0019] In addition, metal iodide powder can be used to produce metal iodide granules with a particle size of more than 1000 μm using common granulation methods such as compression granulation, extrusion granulation, rolling granulation, and stirring granulation, depending on the application, dissolution rate, etc.

[0020] The powder characteristics of the metal iodide powder stored in the package will be described.

[0021] The upper limit of the angle of repose of the metal iodide powder taken out of the package, measured according to the following procedure A, is, for example, 31° or less, preferably 30.8° or less, and more preferably 30.5° or less. This can improve the handleability. The lower limit of the angle of repose of the metal iodide powder is not particularly limited, but may be, for example, 25° or more, preferably 25.5° or more, and more preferably 26° or more.

[0022] The upper limit of the collapse angle of the metal iodide powder taken out of the package, measured according to the following procedure A, is, for example, 20.0° or less, preferably 19.5° or less, and more preferably 19° or less. This can improve the flowability of the powder. The lower limit of the collapse angle of the metal iodide powder is not particularly limited, but may be, for example, 14° or more, preferably 14.5° or more, and more preferably 15° or more.

[0023] Procedure A for measuring the angle of repose and angle of collapse of metal iodide powder is as follows. First, the package is stored in a thermo-hygrostat at 40° C. and 60% RH for 48 hours. After storage, the metal iodide powder is removed from the package and passed through a sieve with 710 μm openings at room temperature (25° C.), and the portion that passes through is used as the sample powder. A funnel with an outlet inner diameter of 8 mm is attached at a height of 7.5 cm from the horizontal plate installed in the powder tester. The obtained sample powder is continuously fed vertically through a funnel onto the surface of a horizontal plate to form a cone-shaped deposit that maintains a constant shape. Calculate the angle of repose (°) between the side of the cone-shaped pile and the surface of the horizontal plate. Next, the horizontal plate is impacted three times with a powder tester. After that, the angle of elevation between the side of the cone-shaped pile and the surface of the horizontal plate is calculated, and this is taken as the collapse angle (°).

[0024] The upper limit of the bulk density of the metal iodide powder removed from the package, measured according to the procedure B below, is, for example, 1.90 g / cm 3 The ratio is preferably 1.88 or less, and more preferably 1.85 or less, whereby the long-term storage stability can be improved. The lower limit of the bulk density of the metal iodide powder is, for example, 1.40 g / cm 3 or more, preferably 1.43 or more, and more preferably 1.45 or more.

[0025] The hard bulk density of the metal iodide powder removed from the package, measured according to the procedure B below, is defined as D1, and the loose bulk density is defined as D2. Using D1 and D2, the compressibility is calculated based on ((D1-D2) / D2) x 100. The upper limit of the compaction degree of the metal iodide powder or grain taken out from the package is, for example, 11.0% or less, preferably 10.8% or less, and more preferably 10.5% or less, which can improve the long-term storage stability. The lower limit of the compression degree of the metal iodide powder is, for example, 5% or more, preferably 5.3% or more, and more preferably 5.5% or more.

[0026] Procedure B for measuring the loose bulk density and hardened bulk density of metal iodide powder is as follows. First, the package is stored in a thermo-hygrostat at 40° C. and 60% RH for 48 hours. After storage, the metal iodide powder is removed from the package and passed through a sieve with 710 μm openings at room temperature (25° C.), and the portion that passes through is used as the sample powder. The obtained sample powder was allowed to drop naturally from a height of 7 cm and then dropped to a depth of 100 cm. 3 Prepare a heaping cup by pouring the liquid into the measuring cup and continuing until it overflows. Next, for the heaped cup, without tapping, the overflowed powder was leveled off from the top of the cup, and the mass (g) of the sample powder filled in the cup was measured, and the loose bulk density (g / cm 3 ) is calculated. On the other hand, for the heaped cup, after tapping 180 times in the up and down direction (stroke length 1.8 cm, 1 second / time), the powder that overflowed from the top of the cup was removed, and the mass (g) of the sample powder filled in the cup was measured, and the compacted bulk density (g / cm 3 ) is calculated.

[0027] The amount of residue on sieves with 710 μm, 355 μm, and 250 μm meshes in the metal iodide powder removed from the package, measured according to the following procedure C, may be as follows, which can improve long-term storage stability. The amount of the sieve residue on a sieve with an opening of 710 μm is, for example, 0.5% by mass or more and 14% by mass or less, and preferably 1.8% by mass or more and 10% by mass or less. The amount of the sieve residue on a sieve with an opening of 355 μm is, for example, 8% by mass or more and 13% by mass or less, and preferably 8.5% by mass or more and 11% by mass or less. The amount of the sieve residue on a sieve with an opening of 250 μm is, for example, 25% by mass or more and 50% by mass or less, preferably 28% by mass or more and 49% by mass or less. The amount of the material passing through a sieve having an opening of 250 μm is, for example, 30% by mass or more and 55% by mass or less, and preferably 35% by mass or more and 50% by mass or less.

[0028] Procedure C for measuring the amount of sieve residue of metal iodide powder is as follows. First, the package is stored in a thermo-hygrostat at 40° C. and 60% RH for 48 hours. A predetermined amount of the metal iodide powder removed from the packaging after storage is sieved at room temperature (25°C) using a 710 μm mesh sieve, a 355 μm mesh sieve, and a 250 μm mesh sieve in that order, and the remaining amount of the metal iodide powder remaining on each sieve and the amount that passed through all of the sieves are measured. The ratio (mass %) of the remaining amount or the passed amount to the predetermined amount is calculated as the sieve residue amount or the passed amount.

[0029] The upper limit of the moisture content of the metal iodide powder taken out of the package, as measured according to the following procedure D, is, for example, 30 ppm or less, preferably 29.8 ppm or less, and more preferably 29.5 ppm or less, which can improve the long-term storage stability. The lower limit of the moisture content of the metal iodide powder is not particularly limited, but may be 0 ppm or more, or 0.1 ppm or more.

[0030] The procedure for measuring the moisture content of metal iodide powder D is as follows: First, the package is stored in a thermo-hygrostat at 40° C. and 60% RH for 48 hours. After storage, the metal iodide powder is taken out of the package and the moisture content is measured using a Karl Fischer moisture meter.

[0031] In this embodiment, it is possible to control the angle of repose, angle of collapse, bulk density, compressibility, sieve residue, and moisture content of the metal iodide powder particles by appropriately selecting, for example, the configuration of the bag in the package and the method of sealing the metal iodide powder particles in the bag. Among these, for example, storing the metal iodide powder particles before sealing in a dehumidified environment, adjusting the indoor humidity at the time of sealing to a low value appropriate for the type of metal iodide, using a bag made of an aluminum laminate film with a relatively low water vapor transmission rate, and cutting off coarse particles of the metal iodide powder particles are listed as elements for setting the angle of repose, angle of collapse, bulk density, compressibility, sieve residue, and moisture content of the metal iodide powder particles to desired numerical ranges. In particular, by removing and classifying coarse particles with a particle size of 5 mm or more, the particle size variation of the metal iodide powder can be suppressed, and the quality of the powder characteristics can be stabilized.

[0032] According to the findings of the present inventors, it has been found that the hygroscopicity of potassium iodide increases rapidly when the critical relative humidity exceeds 60%. Based on this finding, it is presumed that the powder characteristics of the metal iodide powder stored in the package can be set to a desired numerical range by controlling the indoor humidity at the time of sealing to an appropriate critical relative humidity or lower depending on the type of metal iodide, and by using a bag with high water barrier properties to suppress the permeation of moisture into the bag.

[0033] <Bag> Fig. 1 is a schematic diagram showing an example of the configuration of a packaging body of this embodiment, Fig. 1(a) is a side view, and Fig. 1(b) is a cross-sectional view taken along the line AA in Fig. 1(a). The package 10 has a bag 1 that hermetically houses therein metal iodide powder 2. The bag 1 is an aluminum bag made of aluminum laminate film.

[0034] The aluminum laminate film is a laminate film in which an aluminum layer and a resin layer are laminated, and may have a laminate structure in which at least a resin layer and an aluminum layer are laminated in this order from the inside of the bag 1. Note that the bag 1 may contain other materials in addition to aluminum and resin for the purpose of improving gas barrier properties and reducing water vapor permeability.

[0035] The aluminum layer of the aluminum laminate film is not particularly limited as long as it is a layer containing aluminum, and for example, an aluminum foil or an aluminum vapor deposition layer is used. The aluminum material may be any material containing aluminum, and for example, in addition to pure aluminum, an aluminum alloy such as Al-Mn, Al-Mg, or Al-Fe can be used.

[0036] Examples of the resin layer of the aluminum laminate film include resin films such as nylon (NY), polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), and chlorinated polyethylene resin (SPE). This can improve the gas barrier properties of the bag 1. These may be used alone or in combination of two or more. The innermost layer of the bag 1 is preferably provided with a resin layer with excellent thermal melting properties as a heat seal layer.

[0037] The bag 1 may be formed by laminating a plurality of aluminum layers and resin layers. The bag 1 may be configured such that one or more resin layers are laminated on both sides of the aluminum layer. The number of layers of the bag 1 may be, for example, 3 to 10.

[0038] The aluminum layer and the resin layer can be bonded to each other by a known method, for example, by thermocompression or by using an adhesive, such as a heat-curing adhesive or an ultraviolet-curing adhesive.

[0039] In the bag 1, at least one of the resin layers on the inside and outside of the aluminum layer may contain a moisture absorption inhibitor. This makes it possible to suppress deterioration of the powder characteristics of the metal iodide powder stored in the bag 1. Known moisture absorption inhibitors can be used, such as calcium oxide, calcium carbonate, calcium chloride, potassium carbonate, tetraphosphorus hexaoxide, zeolite, silica gel, etc. Among these, calcium oxide, silica gel, etc. are preferred.

[0040] The thickness of the bag 1 is not particularly limited, but is preferably 20 μm or more and 500 μm or less, more preferably 30 μm or more and 300 μm or less, and even more preferably 40 μm or more and 200 μm or less. By setting the content at or above the lower limit, it is possible to improve the mechanical strength and gas barrier properties of bag 1. By setting the content at or below the upper limit, bag 1 can be easily packed in a box.

[0041] The water vapor transmission rate of the bag 1, measured in accordance with JIS K7129B (temperature 40°C, relative humidity 90% RH), is, for example, 0.2 g / m 2 ·day or less, preferably 0.1g / m 2 ·day or less, more preferably 0.05 g / m 2 By keeping the value within this range, the storage stability of the metal iodide powder can be improved.

[0042] The bag 1 may be in the form of, for example, a standing pouch, two-sided seal, three-sided seal, four-sided seal, etc. Among these, a three-sided seal is used from the viewpoint of storage capacity and storability.

[0043] The weight of the metal iodide powder 2 enclosed in the bag 1 is not particularly limited, but may be, for example, 15 kg to 50 kg, preferably 20 kg to 45 kg. By having the weight be equal to or greater than the lower limit, the efficiency of transportation can be improved. By having the weight be equal to or less than the upper limit, the handling of the package 10 can be facilitated.

[0044] When the volume of the metal iodide powder 2 enclosed in the bag 1 is V1 and the volume of the internal space of the bag 1 is V2, the packaging body 10 may be configured so that V1 / V2 is, for example, greater than or equal to 0.4 and less than 1.0. The lower limit of V1 / V2 is, for example, 0.4 or more, preferably 0.45 or more, and more preferably 0.50 or more. The upper limit of V1 / V2 is, for example, less than 1.0, preferably 0.95 or less, and more preferably 0.90 or less.

[0045] An example of a method for producing the package 10 includes a filling step of filling the inside of the bag 1 with metal iodide powder 2. In the filling step, the air inside the bag 1 may be sucked out to degas it, or the inside of the bag 1 may be filled with a non-reactive gas such as argon gas or dry air. In addition, the bag 1 may contain a small bag containing an anti-adherence agent such as potassium carbonate or silica gel together with the metal iodide powder 2. Furthermore, before being packed into the bag 1, the metal iodide powder 2 may be subjected to a drying treatment in advance by heating, reducing pressure, using dry air, or the like.

[0046] <Packing box> The packaging box of the present embodiment includes the above-mentioned packaging body and a packaging container that contains one or more of the packaging body, thereby improving the transportability of the packaging body.

[0047] Examples of packaging containers include cardboard boxes, fiber drums, flexible container bags such as urethane bags, and plastic bottles.

[0048] Although the embodiments of the present invention have been described above, these are merely examples of the present invention, and various configurations other than those described above can be adopted. Furthermore, the present invention is not limited to the above-described embodiments, and modifications and improvements within the scope of the present invention are included in the present invention. EXAMPLES

[0049] The present invention will be described in detail below with reference to examples, but the present invention is not limited to the descriptions of these examples.

[0050] <Manufacturing of packages containing metal iodide powder> 1. Manufacturing of metal iodide powder The aqueous potassium iodide solution was granulated and dried using a spray fluidized granulation dryer to obtain potassium iodide powder. The powder taken out of the spray fluidized granulation dryer was classified using a 4 mesh sieve to remove coarse particles with a particle size of 5 mm or more, thereby producing potassium iodide powder, which is a metal iodide powder. In addition, dry hot air with a controlled temperature set to 130° C. to 175° C. was supplied to the spray fluidized granulation dryer, and no potassium iodide fine powder was charged as seed crystals. The particle size of the potassium iodide powder obtained after classification was measured in accordance with JIS K0069, the screening test method for chemical products, and was confirmed to be 1000 μm or less.

[0051] 2. Metal iodide powder is sealed in a bag Example 1 The potassium iodide powder immediately after production was temporarily stored in a container into which dehumidified air was introduced, and then 1 kg of the powder was placed in the aluminum bag (three-sided sealed bag) described below at an indoor temperature of 22°C and an indoor humidity of 55% RH, and the bag opening was heat-sealed and sealed while degassing the air inside the bag. This produced the package of Example 1. Example 2 A package of Example 2 was obtained in the same manner as in Example 1, except that the humidity was set to 30% RH. Example 3 A package of Example 3 was obtained in the same manner as in Example 1, except that the temperature was 26° C. and the humidity was 30% RH.

[0052] (Comparative Examples 1 to 3) Packages of Comparative Examples 1 to 3 were obtained in the same manner as in Examples 1 to 3, except that the potassium iodide powder immediately after production was stored under air and the aluminum bag was changed to the following PET bag.

[0053] Details of the bags used above are shown below. Aluminum bag: 3-sided sealed bag, (PET (12μm) / Al (7μm) / LLDPE (70μm)), water vapor permeability: 0.05g / m 2 ·day or less PET bag: 3-side sealed bag, (PET (12μm) / ONY (15μm) / LLDPE (70μm)), water vapor permeability: 0.3g / m 2 ·day PET is an abbreviation for polyethylene terephthalate, Al is aluminum foil, LLDPE is linear low-density polyethylene, and ONY is biaxially oriented nylon. A film sheet was prepared by laminating PET (base layer), Al (barrier layer), and LLDPE (sealant layer) in that order, and two film sheets were stacked together with the sealant layers on the inside, and then dry laminated and aged on three sides (sides and bottom) to obtain the aluminum bag. The PET bag was also manufactured in the same manner as the aluminum bag. The water vapor transmission rate was measured in accordance with JIS K7129B (temperature: 40° C., relative humidity: 90% RH).

[0054] [Table 1]

[0055] The metal iodide powder particles stored in the packages of each of the Examples and Comparative Examples were evaluated based on the following evaluation items.

[0056] <Storage> The packages of each of the Examples and Comparative Examples were stored in a thermo-hygrostat (PR-2J, manufactured by Espec Corp.) at 40° C. and 60% RH for 48 hours.

[0057] <Angle of repose, angle of collapse> The metal iodide powder particles taken out from the packaging after storage were sieved through a sieve with 710 μm openings at room temperature (25° C.) with an amplitude of 1.5 mm and an operating time of 170 seconds, and the sieve that passed through was used as a sample powder. Using a powder tester (PT-X, manufactured by Hosokawa Micron Corporation), a funnel with an outlet inner diameter of 8 mm was attached at a position 7.5 cm high from a horizontal plate installed in the powder tester. The obtained sample powder was continuously fed from the vertical direction through the funnel onto the surface of the horizontal plate to form a cone-shaped deposit that maintained a constant shape. The elevation angle between the side of the cone-shaped deposit and the surface of the horizontal plate was calculated and this was taken as the angle of repose (°). Next, the horizontal plate was impacted three times with a powder tester. After that, the elevation angle between the side of the cone-shaped pile and the surface of the horizontal plate was measured and this was taken as the collapse angle (°).

[0058] <Loose bulk density, hard bulk density, compression degree> The metal iodide powder particles removed from the packaging after storage are sieved through a sieve with 710 μm openings at room temperature (25°C) with an amplitude of 1.5 mm and an operating time of 30 seconds, and the portion that passes through is used as the sample powder. The obtained sample powder was allowed to drop naturally from a height of 7 cm and then dropped to a depth of 100 cm. 3 A heaped cup was prepared by pouring the liquid into a measuring cup and continuing until the liquid overflowed from the cup. Next, for the heaped cup, without tapping, the overflowed powder was leveled off from the top of the cup, and the mass (g) of the sample powder filled in the cup was measured, and the loose bulk density (g / cm 3 ) was calculated. On the other hand, a powder tester (PT-X, manufactured by Hosokawa Micron Corporation) was used to tap the heaped cup 180 times in the up and down direction (stroke length 1.8 cm, 1 second / time), and the powder that overflowed from the top of the cup was then leveled off. The mass (g) of the sample powder filled in the cup was then measured, and the compacted bulk density (g / cm 3 ) was calculated. Using the compacted bulk density (D1) and loose bulk density (D2) obtained above, the degree of compression was calculated based on ((D1-D2) / D2) x 100.

[0059] <Particle size distribution (sieve residue amount)> A predetermined amount (10 g) of the metal iodide powder removed from the package after storage as described above was sieved using a 710 μm mesh sieve, a 355 μm mesh sieve, and a 250 μm mesh sieve, in that order, at room temperature (25° C.) with an amplitude of 1.5 mm and an operating time of 600 seconds. The amount (g) of metal iodide powder remaining on each sieve and the amount (g) that passed through all sieves were measured, and the ratio (mass %) of the remaining amount and the passed amount to a specified amount (initial value) was calculated as the sieve residue amount and the passed amount.

[0060] <Moisture content> After storage, the metal iodide powder particles were taken out of the package and the moisture content (ppm) was measured using a Karl Fischer moisture meter (Hiranuma Sangyo Co., Ltd., KF moisture meter AQV-2200AS).

[0061] <Handling> Immediately after the above storage, the metal iodide powder was evaluated for handleability based on the following evaluation criteria. ○: When the observer palpated the entire metal iodide powder inside the bag from the outside of the bag without opening it, the presence of any clumps of powder was not confirmed overall. △: During the above palpation, it was confirmed that up to about 50% by volume of the powder or granules were in clumps. ×: During the above palpation, it was confirmed that approximately 90 to 100% by volume of the powder or granules were in lumps.

[0062] <Long-term storage> Packages of Examples 4 to 6 and Comparative Examples 4 to 6 were produced in the same manner as in Examples 1 to 3 and Comparative Examples 1 to 3, except that the weight of the potassium iodide powder to be enclosed was changed from 1 kg to 25 kg. The packages of Examples 4 to 6 and Comparative Examples 4 to 6 were each stored in the atmosphere for a long period of three months after packaging. The potassium iodide powder taken out from the package after long-term storage was evaluated. As a result, it was confirmed that the powder had high fluidity and was in a smooth state in Examples 4 to 6, but in Comparative Examples 4 to 6, the powder solidified after one and a half months, and no fluidity was observed at all after three months. [Explanation of symbols]

[0063] 1 bag 2. Metal iodide powder 10 Packaging

Claims

1. A method for manufacturing a package comprising a bag made of an aluminum laminate film and a metal iodide powder or granule sealed inside the bag, the method comprising: A method for producing a package, comprising the steps of storing the metal iodide powder in a dehumidified environment before sealing, and then sealing the metal iodide powder in a bag at a relative humidity of 60% or less.

2. A method for manufacturing the packaging body described in claim 1, A method for producing a package, wherein the metal iodide powder contains any one selected from the group consisting of potassium iodide, lithium iodide, sodium iodide, rubidium iodide, cesium iodide, calcium iodide, strontium iodide, and aluminum iodide.

3. A method for manufacturing a packaging body according to claim 1 or 2, comprising: In the metal iodide powder, the content of The amount of residue on a sieve having an opening of 710 μm is 0.5% by mass or more and 14% by mass or less, The amount of residue on a sieve having an opening of 355 μm is 8% by mass or more and 13% by mass or less, The amount of residue on a sieve having an opening of 250 μm is 25% by mass or more and 50% by mass or less, and A method for manufacturing a packaging body, wherein the amount passing through a sieve with an opening of 250 μm is 30 mass% or more and 55 mass% or less. (Step C) The package is stored in a thermo-hygrostat at 40° C. and 60% RH for 48 hours. A predetermined amount of the metal iodide powder is removed from the package after storage and sieved using a 710 μm mesh sieve, a 355 μm mesh sieve, and a 250 μm mesh sieve in that order. The amount of the metal iodide powder remaining on each sieve and the amount that passed through all of the sieves are measured, and the ratio (mass %) of the remaining amount or the passed amount to the predetermined amount is calculated as the sieve residue amount or the passed amount.

4. A method for producing a packaging body according to any one of claims 1 to 3, comprising: A method for producing a package, wherein the moisture content of the metal iodide powder or granules, as measured according to the following procedure D, is 30 ppm or less. (Procedure D) The package is stored in a thermo-hygrostat at 40° C. and 60% RH for 48 hours. After storage, the metal iodide powder is taken out of the package and the moisture content is measured using a Karl Fischer moisture meter.

5. A method for producing a packaging body according to any one of claims 1 to 4, comprising: The method for manufacturing a packaging body, wherein the aluminum laminate film has a laminated structure in which at least a resin layer and an aluminum layer are laminated in this order from the inside of the bag.

6. A method for producing a packaging body according to any one of claims 1 to 5, comprising: The method for producing a package, wherein the content of the metal iodide contained in the metal iodide powder is 90 mass% or more of the total.

7. A method for producing a packaging body according to any one of claims 1 to 6, comprising: A method for producing a package, wherein when the metal iodide powder particles are sieved through a sieve with 1000 μm openings, the amount of the metal iodide powder particles that pass through the sieve is 80% by weight or more of the total amount.

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