JP5225667B2 - Packing container and packing method - Google Patents

Description

  The present invention relates to a packing container and a packing method.

It is important to maintain the shape and properties of the powder compact obtained by forming the powder.
For example, in the case of a catalyst or the like used in a multi-tubular reactor, the gas flow in the reactor may become non-uniform if the shape is damaged, If the catalyst has absorbed moisture, problems such as reduced reactivity may occur.

  And in the case of storing or transporting the powder molded body as described above, in order to prevent the powder molded body from being altered due to moisture absorption etc. during storage, etc., in the bag formed of the moisture-proof material, The powder compact is hermetically sealed and stored and transported (for example, Patent Document 1).

  However, the bag as described above is effective in preventing moisture absorption of the powder molded body at room temperature, but when the place where the bag is stored and transported becomes hot, the gas in the bag expands and the volume increases. May be torn. If the bag is torn, since the powder molded body is exposed to the outside air, the powder molded body may absorb moisture and change its quality.

  In addition, the powder compact may be stored and transported in a moisture-proof container as described above in a state of being weighed and divided into a plurality of sachets. In this case, when the place where the container is stored and transported becomes high temperature, there is a possibility that the sachet expands and is torn even if the container containing the sachet is not damaged. Then, since the sachets are torn and the powder compacts inside thereof are scattered in the container, if a plurality of sachets are torn, the powder compacts must be stored in the sachets again, and the powder compacts are reweighed It takes a lot of work because you have to do it. And the scattered powder compact may damage other sachets, and the other sachets may be damaged.

  Furthermore, when a metal can is used as a container for storing a sachet, the powder molded body scattered in the can may be worn by friction with the can, and its shape may change.

JP 2003-10695 A

  In view of the above circumstances, the present invention provides a packaging container and a packaging method capable of preventing the bag from being damaged regardless of the surrounding environment when a bag containing contents is contained in the container. With the goal.

A packing container according to a first aspect of the present invention is a container for packing a powder molded body, and includes a flexible sealed container that hermetically seals the powder molded body, and a holding container that houses the sealed container. container has strength greater than the material of the enclosure, its inner volume state, and are not less than the maximum volume at the time when the enclosure is inflated, it is accommodated in the sealed container, having an air permeability An internal container is provided, and the powder compact is accommodated in the internal container.
A packing container according to a second invention is characterized in that, in the first invention, a plurality of the inner containers are provided, and each of the inner containers is filled with the weighed powder compact.
The packaging container according to a third aspect of the invention is characterized in that, in the first or second aspect of the invention, the sealed container has moisture resistance, and the moisture permeability at 25 ° C. is 1.0 g / m ² · 24 h or less. And
The packaging container of a fourth invention is characterized in that, in the first invention, the enclosing container has stretchability.
A packing method of a fifth invention is a packing method for packing a powder molded body, wherein the powder molded body is hermetically sealed in a sealed container in a state where the powder molded body is housed in a breathable inner container, and the powder molding is performed. The sealed container in which a body is sealed is housed in a holding container having a strength higher than that of the material of the sealed container and having an inner volume smaller than a maximum volume when the sealed container is expanded.
A packing method according to a sixth aspect of the invention is characterized in that, in the fifth aspect of the invention, after the powder compacts are weighed and sealed in the plurality of inner containers, and then the plurality of inner containers are hermetically sealed in the sealing container. And
The packing method of a seventh invention is characterized in that, in the fifth invention, the inner container is hermetically sealed in the sealed container while flowing a dry gas in the sealed container.
The packing method according to an eighth aspect of the present invention is the moisture-proof property according to the fifth, sixth, or seventh aspect , wherein the sealed container is formed so that the moisture permeability at 25 ° C. is 1.0 g / m ² · 24 h or less. It is characterized by using this container.

According to the first invention, when the packaging container is stored or transported, even if the ambient temperature rises and the gas in the sealed container expands, the sealed container can expand only to the inner volume of the holding container. Therefore, it can prevent that an enclosure is damaged . When or transported or stored bales encased device, even if expansion gas in the inner container ambient temperature rises, since the gas by venting of the internal container is discharged into enclosed container, interior The container can be prevented from being damaged.
According to the second aspect of the invention , since the powder compact accommodated in the inner container has been weighed, it is possible to save the trouble of weighing again at the time of use. And since an internal container does not break, it can carry out storage conveyance etc. reliably, maintaining the powder molded object of the measured state in an internal container.
According to the third aspect of the invention , even a powder molded body having hygroscopicity can be applied to long-term storage due to low moisture permeability, and it is applied to storage in a place where temperature and humidity are relatively high. be able to.
According to the fourth aspect of the invention , in the state where the gas in the enclosing container is not expanded, the volume of the enclosing container contracts small and is not bulky. And an enclosure can be accommodated in a holding | maintenance container in a compact state compared with the expanded state.
According to the fifth invention , when the packaging container is stored or transported, even if the ambient temperature rises and the gas in the sealed container expands, the sealed container can expand only to the inner volume of the holding container. Therefore, it can prevent that an enclosure is damaged . When or transported or stored bales encased device, even if expansion gas in the inner container ambient temperature rises, since the gas by venting of the internal container is discharged into enclosed container, interior The container can be prevented from being damaged.
According to the sixth aspect of the invention , since the powder molded body accommodated in the inner container has been weighed, it is possible to save the trouble of weighing again at the time of use. And since an internal container is not damaged, it can carry out storage conveyance etc. reliably, maintaining the state which weighed the powder compact in the internal container.
According to the seventh aspect of the invention , the humidity in the sealed container can be reduced, so even a powder molded body having hygroscopicity can be stored for a long period of time.
According to the eighth aspect of the present invention , even a powder molded body having hygroscopicity can be applied to long-term storage due to low moisture permeability, and it is applied to storage in a place where temperature and humidity are relatively high. be able to.

Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1A is a schematic explanatory diagram of the packaging device 1 of the present embodiment, and FIG. 1B is a schematic explanatory diagram of a situation where the enclosure 3 is inflated. FIG. 2A is a schematic explanatory diagram when a container having elasticity is used as the enclosure 3 in the packing device 1 of the present embodiment, and FIG. 2B is a diagram of the packing device 1 of the present embodiment. It is a schematic explanatory drawing of a conveyance or storage condition, (C) is a schematic explanatory drawing of the powder compact M enclosed.

  In FIG. 1, the code | symbol 1 has shown the packaging container of this embodiment. The packing container 1 includes an internal container 2 that stores the powder compact M, a sealed container 3 that stores the internal container 2, and a holding container 4 that stores the sealed container 3.

First, the inner container 2 is a container that accommodates the powder molded body M therein, and is formed by a member such as a sheet in which a plurality of through holes communicating between the inside and the outside are formed. Each of the plurality of through holes formed in the inner container 2 is formed to have a size that the powder compact M cannot pass through. For example, as shown in FIG. 2C, when the size of the powder compact M is a cylindrical shape having a diameter D and a length L, the diameter of each through hole is the diameter D of the powder compact M. It is shorter and shorter than the length L.
That is, the inner container 2 is formed so that the powder molded body M does not leak outside while having air permeability.

  The inner container 2 may be a box or can having a regularity, an irregular bag, or a flexible bag (such as a plastic bag). If it can hold | maintain so that may not leak outside, it will not specifically limit.

Next, the enclosure 3 will be described.
The enclosure 3 is, for example, a plastic bag or the like, and is formed of a material having airtightness and flexibility. The enclosing container 3 can accommodate one or a plurality of inner containers 2 and has a size enough to form a bent portion on the surface, for example, a pleated fold. The reason for this will be described later.

  The sealed container 3 is not necessarily a bag as described above, and is not particularly limited as long as it is a container formed of a material having airtightness and flexibility.

Next, the holding container 4 will be described.
The holding container 4 is a container composed of a lid 4a and a main body portion 4b, and is for accommodating the enclosure container 3 therein. The holding container 4 is a container having a strength higher than that of the material of the sealed container 3. That is, the holding container 4 is a highly rigid container formed of a material having a higher strength than the material of the enclosing container 3, for example, a material such as metal or plastics. For example, the holding container 4 is a container such as a pail can formed of metal, plastics, or the like.
The holding container 4 has an inner volume when the lid 4a is attached to the main body portion 4b so as to be smaller than a volume (hereinafter referred to as a burst limit volume) when the enclosing container 3 is expanded until just before the enclosure 3 is broken. Is formed.

  Since it is configured as described above, when the powder compact M is accommodated in the packing container 1 of the present embodiment and stored and transported, the powder compact M is accommodated and held in the hermetically sealed enclosure 3. Since it is accommodated also in the container 4, it can prevent contacting with external air. Therefore, even if it is the powder compact M which needs to be stored and transported in an airtight manner, it is possible to prevent deterioration and deterioration of the powder compact M during storage and transport.

In addition, when the lid 4a and the main body 4b are fixed, if an airtight heat-resistant tape is used to completely close the gap between the two, it is possible to prevent the outside air from entering the holding container 4. Although it can prevent more reliably and can improve the preservability of the powder compact M, the method for fixing the lid 4a and the main body 4b is not particularly limited.
Furthermore, if an air cushion 4c is provided on the inner surface of the lid 4a of the holding container 4 and the inner bottom surface of the main body 4b, the powder compact M and the holding container 4 are indirectly connected via the enclosing container 3 and the inner container 2. Even if they rub or collide with each other, it is possible to reduce the possibility that the powder molded body M is damaged due to wear or impact. Then, in storage and transportation, not only alteration or deterioration of the powder molded body M but also damage or change of the shape of the powder molded body M can be prevented, which is preferable.

The powder compact M is accommodated in the enclosing container 3 in a state where it is accommodated in the internal container 2. For this reason, when storing and transporting a plurality of inner containers 2 accommodated in the enclosing containers 3, the powder compacts M can be encapsulated in the respective weighed states. Then, if the weight of the powder compact M enclosed in the inner container 2 is matched with the weight of the powder compact M required at the time of use, when the powder compact M is taken out from the packaging container 1 and used, The trouble of weighing the molded body M can be saved.
For example, when the powder compact M is a catalyst or the like used in a multi-tube reactor, it is necessary to put a predetermined amount of the powder compact M into a plurality of reaction tubes provided in the reactor. In such a case, the weight of the powder compact M sealed in the inner container 2 is made to coincide with the weight of the powder compact M put into each reaction tube. Then, if all the powder compacts M in the inner container 2 are charged into each reaction tube, a predetermined amount of the powder compact M can be charged into each reaction tube. That is, when the powder compact M is introduced into each reaction tube, the operation of weighing the powder compact M is not required, and therefore the powder compact M can be shortened.

  In the above example, the powder molded body M is stored in the inner container 2 and then sealed in the sealed container 3. However, when the powder molded body M is weighed during use, the inner container 2 is sealed. May not be provided. However, if the inner container 2 is provided, only the inner container 2 can be taken out from the packing container 1 and only the inner container 2 can be transported to the place of use. Then, the powder compact M can be charged from the inner container 2. Then, since the inner container 2 is easier to handle than the heavy holding container 4 and the bulky enclosed container 3, it is possible to facilitate the transportation work of the powder compact M, the charging work of the powder compact M, etc. at the place of use. This is preferable because it is possible.

Here, in the packaging container 1 of this embodiment, since the enclosure container 3 hermetically encloses the inner container 2 (that is, the powder compact M), the packaging container 1 containing the powder compact M is being stored and transported. When the ambient temperature rises, the temperature of the gas in the enclosure 3 also rises, and the gas in the enclosure 3 expands as the temperature rises. When the gas expands, the sealed container 3 expands so that the bent portion expands (FIGS. 1A and 1B), but when the sealed container 3 expands to the burst limit volume, the sealed container 3 is sealed. The container 3 may be damaged.
However, in the packaging container 1 of the present embodiment, the enclosing container 3 is accommodated in the holding container 4 having higher strength than the material of the enclosing container 3, and the holding container 4 has an inner volume that is a burst limit volume. Smaller than. Therefore, when the bent portion expands and expands to the inner volume of the holding container 4, the sealed container 3 cannot expand further no matter how much the ambient temperature rises. That is, since the enclosure 3 cannot expand to the burst limit volume, it does not break.
On the other hand, although the pressure of the gas in the enclosure 3 is supported by the holding container 4, the holding container 4 is a highly rigid container. The holding container 4 is formed so as to have a strength that does not break even if the atmospheric pressure in the sealed container 3 rises due to an increase in ambient temperature during storage and transportation of the packaging container 1. ing.
For this reason, even if the ambient temperature rises during storage and transportation of the packaging container 1 containing the powder compact M, the enclosing container 3 and the holding container 4 are not damaged. Then, even if the ambient temperature rises, the powder molded body M can be hermetically held inside the enclosing container 3 and the holding container 4, and the powder molded body M can be prevented from coming into contact with the outside air. The powder compact M can be stored and transported even in places where the humidity is relatively high.

  The lid 4a and the main body portion 4b of the holding container 4 are fixed so that they do not come off even when the enclosure container 3 receives the pressure of the gas in the enclosure container 3 after it has expanded to the internal volume of the holder container 4. Needless to say.

Moreover, in the packaging container 1 of this embodiment, the internal container 2 accommodated in the enclosure 3 has air permeability. Then, even if the ambient temperature rises during storage and transportation of the packaging container 1 and the gas in the inner container 2 expands, the gas in the inner container 2 is discharged into the enclosure 3 due to the air permeability of the inner container 2. Is done. That is, even if the gas in the inner container 2 expands, the inner container 2 itself does not expand and is not damaged.
Therefore, even when the packaging container 1 of the present embodiment is stored and transported in a state in which the plurality of inner containers 2 are accommodated in the enclosing container 3, the state where the powder compact M is weighed in each inner container 2 is maintained. The powder compact M can be reliably stored and transported.

In said example, the case where the powder compact M to be airtightly stored by the packaging container 1 of this embodiment was packed was demonstrated. However, when packing the powder molded body M having the property of being deteriorated due to moisture absorption, a material having moisture resistance in addition to airtightness and flexibility is used as the enclosing container 3 of the packaging container 1 of the present embodiment. It is preferable to do.
In such a case, the moisture resistance of the enclosing container 3 can keep the humidity in the inner container 2 low for a certain period of time, and can suppress deterioration and deterioration of the powder compact M in the inner container 2. Just do it. For example, when the powder compact M is a catalyst for producing methacrylic acid, the catalyst for producing methacrylic acid is used as long as the moisture permeability at 25 ° C. is 1.0 g / m ² · 24 h or less. For example, it can be stored for a long period of one year or more, and can be stored even in a place where the temperature and humidity are relatively high.

  In addition, although the case where the enclosure container 3 is single is demonstrated in the said example, the enclosure container 3 may be double. In this case, there is an advantage that the airtightness in the sealed container 3 and the moisture permeation preventing effect can be enhanced.

As shown in FIG. 2B, when storing and transporting a large number of packing containers 1, a pallet P is placed on the plurality of packing containers 1, and the packing container 1 is further placed on the pallet P. There are cases where multiple items are stored and transported. When the container is stored and transported in such a state, the holding container 4 is not only capable of supporting the pressure of the gas in the sealed container 3 but also has a strength that does not cause deformation or crushing due to a load from above. Is preferred.
For example, if the packaging container 1 is stacked so that the load is applied only to the outer peripheral edge on the upper surface, the main body against the static load applied to the upper end edge of the main body portion 4b of the holding container 4 located in the lowermost layer. It is preferable that the portion 4b has such a strength that the portion 4b is not crushed. Specifically, if the weight of the packaging container 1 containing the powder compact M is about 50 kg, the pallet P is about 30 kg, and the packaging containers 1 are stacked in four stages as shown in FIG. The strength against a static load applied to the upper end edge of the main body 4b of the holding container 4 is preferably 50 kg / m or more. That is, it is preferable that the main body 4b of the holding container 4 has a strength that does not crush even when a static load of about 50 kg or less per unit length is applied to the upper end edge.

Below, the operation | work which encloses the powder compact M in the packaging device 1 of this embodiment is demonstrated.
First, the powder compact M is weighed and filled into the plurality of inner containers 2 and sealed.
Since the inner container 2 originally has air permeability, it may be sealed so that the powder molded body M does not leak. For example, the inner container 2 is made of a resin such as a plastic bag having a plurality of through holes. If it is a container of this, if it seals by heat sealing, since work can be performed continuously, workability | operativity will improve.

Next, the enclosure container 3 is arranged in the main body 4 b of the holding container 4, and a predetermined number of the inner containers 2 are put in the arranged enclosure container 3. Then, when the necessary amount of the inner container 2 has been inserted, the sealed container 3 is hermetically sealed. At this time, sealing is performed so that a bent portion is formed on the surface of the enclosure 3 (see FIG. 1A).
In addition, when using resin containers, such as a plastic bag, for the enclosure container 3, if sealing is performed by heat sealing, sealing with high airtightness can be performed easily and reliably. Further, if the sealing is performed by heat sealing, it is preferable because the work can be performed continuously as in the case of the inner container 2 and the workability is improved.

  And if the lid | cover 4a is attached to the main-body part 4b of the holding container 4, and the main-body part 4b and the lid | cover 4a are fixed, packing of the powder compact M by the packaging container 1 will be complete | finished.

The powder compact M in the enclosure 3 is hermetically shut off from the outside. However, when the inner container 2 is put into the enclosure 3, a certain amount of gas enters the enclosure 3. Then, in the case where the powder compact M has hygroscopicity, the possibility that the powder compact M absorbs moisture due to moisture in the gas enclosed in the enclosing container 3 and deteriorates or deteriorates cannot be denied. .
Therefore, when the inner container 2 is put into the sealed container 3, it is preferable to perform the operation while flowing dry gas into the sealed container 3. Then, since the humidity in the enclosure 3 can be reduced, the powder molded body M having hygroscopicity can be stored for a long period of time, and the powder molded body M absorbs moisture during storage and deteriorates more. It can be surely prevented.

Moreover, although said embodiment demonstrated the case where the enclosure container 3 was flexible, it is also possible to use the container which has elasticity like a rubber bag for the enclosure container 3. FIG. .
In the case where the enclosing container 3 is a stretchable container, the container itself expands when the gas in the enclosing container 3 expands, so that the inner container 2 is bent to the surface in a state of being accommodated therein. It is not necessary to use a portion having a size that can be formed (see FIG. 2A). Then, in the state where the gas in the enclosure 3 is not expanded, the volume of the enclosure 3 is contracted to be small and not bulky, so that the enclosure 3 is placed in the holding container 4 in a compact state compared to the expanded state. Can be accommodated.

  The packing container of the present invention is a powder molded body having a hygroscopic property such as a catalyst used in a multi-tubular reactor, and is suitable for a packing container of a substance that is stored and transported in an airtightly sealed state. ing.

(A) is schematic explanatory drawing of the packaging device 1 of this embodiment, (B) is schematic explanatory drawing of the condition where the enclosure 3 is expanding. (A) is a schematic explanatory drawing at the time of using the container which has elasticity as the enclosure 3 in the packaging device 1 of this embodiment, (B) is conveyance or storage of the packaging device 1 of this embodiment. It is a schematic explanatory drawing of a condition, (C) is a schematic explanatory drawing of the powder compact M to be enclosed.

DESCRIPTION OF SYMBOLS 1 Packing container 2 Inner container 3 Enclosed container 4 Holding container M Powder compact

Claims (8)

A container for packing a powder compact,
A flexible enclosure that hermetically encloses the powder compact;
A holding container for containing the sealed container;
The holding container is
Strength is higher than the material of the enclosure,
Its internal volume state, and are not less than the maximum volume at the time when the enclosure is inflated,
Comprising an air-permeable inner container housed in the enclosed container;
The packing container , wherein the powder compact is accommodated in the inner container. A plurality of the inner containers,
Each inner container
The packing container according to claim 1 , wherein each of the weighed powder compacts is enclosed. The enclosed container has moisture resistance,
The packaging container according to claim 1 or 2 , wherein the moisture permeability at 25 ° C is 1.0 g / m ² · 24 h or less. The packaging container according to claim 1, wherein the enclosure has elasticity. A packing method for packing a powder compact,
The powder compact is hermetically sealed in a sealed container in a state of being housed in an air-permeable inner container ,
The sealed container in which the powder compact is sealed is housed in a holding container having a strength higher than that of the material of the sealed container and a smaller internal volume than the maximum volume when the sealed container is expanded. How to packing . 6. The packing method according to claim 5 , wherein after the powder compacts are weighed and sealed in the plurality of inner containers, the plurality of inner containers are hermetically sealed in the sealed containers. The packing method according to claim 5 , wherein the inner container is hermetically sealed in the sealed container while flowing a dry gas in the sealed container. The package according to claim 5, 6 or 7, wherein a moisture-proof container formed so that a moisture permeability at 25 ° C is 1.0 g / m ² · 24h or less is used as the sealed container. Way .

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