JP5425923B2 - Double container and manufacturing method thereof - Google Patents

Description

  The present invention relates to a double-structured container suitable for storing contents such as medicines and supplements made of granular materials such as tablets and capsules, and powdery materials such as microcapsules, and a method for producing the same.

Since tablets are hard but fragile, when stored in a state where there is a gap in the container, the tablets collide with each other during transportation or collide with the container and be damaged.
Therefore, normally, as described in Patent Document 1, an elastic filler such as a sponge is accommodated in the container together with the tablets, and the tablets are prevented from moving so that the tablets do not collide with each other.

However, in the container of Patent Document 1, the tablet may be damaged when an external impact is applied to the tablet through the container.
In addition, it is necessary to load an elastic filler, which is separate from the container, into the container in a compressed state, and the loading operation is complicated.

  The double container of Patent Document 2 almost overcomes the drawbacks of the container of Patent Document 1 described above. This double container is manufactured as follows. First, a laminated bottle is obtained by blow molding a parison having an inner layer and an outer layer of different materials. The outer layer of the laminated bottle has rigidity, and the inner layer has flexibility and can be peeled from the outer layer. After filling the laminated bottle with a tablet, a cap with a stopper is attached to the laminated bottle. The stopper protrudes upward from the cap and maintains the hole in the center of the cap in an open state. Next, the inner space of the laminated bottle is degassed through the hole of the cap, and the inner layer is peeled off from the outer layer and contracted using the negative pressure to form a double container. As a result, the contracted inner layer becomes an inner bag, and the tablet is tightly immovably held. The outer layer remains as an outer container body while maintaining its shape. Finally, the stopper is pushed down to close the hole of the cap and the inner bag is sealed.

  Since the double container obtained as described above tightly encloses the tablets in an inner bag so as not to move, the tablets can be prevented from colliding with each other. Moreover, since a gap is formed between the inner bag and the inner periphery of the outer container body, the risk of the tablet being damaged by an external impact can be reduced.

Utility Model Registration No. 2555612 JP 2001-348062 A

  However, in the double container of Patent Document 2, the inner layer is not peeled over the entire region at the same time in the deaeration process. As a result, the final shape of the inner bag is not constant, and a part of the inner bag is part of the outer container body. The tablet may be in contact with or close to the inner periphery, and the tablet cannot be protected from an external impact through the outer container body.

In Patent Document 2, since the center of the bottom of the inner layer and the center of the bottom of the outer layer are fused, the inner bag is prohibited from contracting in the axial direction and contracts only in the radial direction. As a result, the shape of the inner bag is stable as compared with the case where the bottom portion is not fused, but the inner bag is biased in the radial direction due to the mismatch of the peeling time of the inner layer. In some cases, a sufficient gap may not be secured over the entire circumference.
In addition, in the case of the bottom fusion, since the bottom of the outer container body, the inner bag, and the bottom are in contact, the tablet cannot be protected from an external impact through the bottom of the outer container body.

In Patent Document 2, after the inner bag is contracted by performing deaeration in the bottom fusion state, the bottom of the inner bag and the bottom of the outer container body are pushed up by pushing up the bottom of the inner bag by an external force. There is a description that a gap may be formed between the two, but it is actually necessary to release the bottom fused state by pushing up the inner bag through the bottom of the outer container body to form the gap. It is difficult. Even if it is possible, if the final shape of the inner bag is changed and the tightly held tablets are forcibly moved, the tablets may be damaged.
Moreover, after deaeration, the stopper must be pushed down to close the hole of the cap to seal the inner bag, and the sealing work is complicated.

The present invention has been made in order to solve the above-described problem, and includes an inner container body that has a body portion, a closed portion that closes a proximal end of the body portion, and stores contents in an internal space, An outer container body that has a closing portion that closes the base end of the body portion and accommodates the inner container body; and lid means that airtightly closes an opening at the distal end of the body portion of the inner container body, and the outer container body And in the double container in which the ends of the body portion of the inner container body are fixed to each other,
The body portion of the inner container body has flexibility, and in the natural state, the outer diameter thereof is smaller than the inner diameter of the body portion of the outer container body. There is provided a check valve used when negative pressure is applied to the internal space of the body, and the body portion of the inner container body is contracted by the negative pressure of the internal space to tightly enclose the contents. In the holding state, an annular gap is formed between the body portion of the inner container body and the body portion of the outer container body, and between the closed portion of the inner container body and the closed portion of the outer container body. Also, a gap is formed.

  According to the above configuration, since the outer diameter of the body portion of the inner container body in the natural state is smaller than the inner diameter of the body portion of the outer container body, the contents can be densely packed even if there is little shrinkage in the radial direction of the inner container body. As a result, the shape of the inner container body can be stabilized, and a sufficient gap can be secured over the entire circumference between the outer periphery of the inner container body and the inner periphery of the outer container body. . In addition, by securing a gap between the inner container body and the bottom of the outer container body, the contents can be reliably prevented from being damaged by an external impact. Furthermore, deaeration of the inner container body can be easily performed, and a negative pressure state of the inner container body after the deaeration can be ensured.

Preferably, the body portion of the inner container body has a cylindrical shape, and the base end of the body portion is provided with shape holding means for maintaining a cross-sectional shape of the base end in a natural state, and The body is contracted in the axial direction from the natural state by the negative pressure.
According to this configuration, the amount of shrinkage in the axial direction can be controlled by suppressing the radial shrinkage of the body portion of the inner container body by the shape holding means. In addition, since the shake of the inner container body is suppressed even if the double container receives an impact, the inner container body can be prevented from hitting the outer container body, and from this point also, the contents are prevented from being subjected to an impact. it can.

Preferably, the closed portion of the inner container body is also flexible, and an annular shape holding portion is fixed as the shape holding means at the boundary between the body portion and the closed portion of the inner container body.
According to this configuration, the weight can be reduced in spite of having the shape holding function.

Preferably, the lid means includes a seal film that hermetically closes the opening of the inner container body, and a cap that is attached to the distal end of the outer container body, and the check valve is provided on the seal film. ing.
According to this configuration, the contents can be better protected by the double structure of the seal film and the cap.

Preferably, the body portion of the outer container body is flexible, and the distal ends of the inner container body and the body portion of the outer container body are configured to maintain a shape for maintaining a cross-sectional shape of the distal end in a natural state. Each part is provided, and the shape holding members of the inner container body and the outer container body are fixed to each other, and the space between the inner container body and the outer container body is sealed.
According to this structure, although the trunk | drum of an outer container body is flexible, since the space between an inner container body and an outer container body is sealed, the shape can be hold | maintained.

  According to another aspect of the present invention, in a method for manufacturing a double container, a flexible barrel portion that is cylindrical in a natural state, a closed portion that closes a proximal end of the barrel portion, and a distal end of the barrel portion that is held in a circular shape In order to do this, the step of supplying the contents to the inner container body having the shape holding portion fixed to the tip, and the peripheral portion of the seal film provided with the check valve are connected to the shape holding portion of the inner container body. Airtightly attaching to the end face, degassing the inner space of the inner container body through the check valve, thereby shrinking the inner container body and tightly enclosing the contents; and A cylindrical flexible barrel having an inner diameter larger than the outer diameter of the barrel of the inner container body, a closing portion that closes the proximal end of the barrel, and a tip of the barrel to hold the barrel in a circular shape An outer container body having a shape holding portion fixed to the tip is prepared, and the inner container body and the outer container are prepared. Fixing the outer container body to the inner container body by fixing the body shape holding parts to each other, and sealing the space between the outer container body and the inner container body; and the outer container body shape holding part. And attaching a cap to cover the sealing film.

  According to the double container of the present invention, it is possible to effectively prevent the contents from being damaged.

FIG. 1 shows a manufacturing process of a double container according to a first embodiment of the present invention. After a tablet is supplied to an inner container body, a seal film with a check valve is attached to the inner container body. It is a longitudinal cross-sectional view which shows a state. FIG. 2A is a longitudinal sectional view showing a state before the inner space of the inner container body is deaerated after the seal film is attached to the inner container body. FIG. 2B is a longitudinal sectional view showing a state in which the inner container body contracts due to deaeration and the tablets are tightly held. FIG. 3 is a longitudinal sectional view showing a state before the cap is screwed onto the outer container body after welding the upper end of the shrunken inner container body and the upper end of the separately prepared outer container body. FIG. 4 is a longitudinal sectional view showing a double container completed by screwing a cap onto the outer container body. FIG. 5 is a longitudinal sectional view showing a state during a deaeration process of the double container according to the second embodiment of the present invention. FIG. 6: is a principal part longitudinal cross-sectional view which shows the state which mounted | wore with another sealing film after deaeration in the 2nd Embodiment. FIG. 7 is a main part longitudinal cross-sectional view showing another aspect of mounting the check valve on the seal film. FIG. 8: is a longitudinal cross-sectional view which shows the state before the deaeration process of the inner container body of the double container which makes 3rd Embodiment of this invention. FIG. 9 is a longitudinal sectional view of a main part showing another aspect of the means for holding the lower end shape of the body portion of the inner container body.

Hereinafter, the double container and the manufacturing method thereof according to the first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 4, the double container, the inner container body 10 tightly to embracing the plurality of tablet 100 (content), and the outer container body 20 for housing the inner container body 10 to form a coaxial, And a lid structure 30 (lid means) that closes the upper end opening of the inner container body 10.

  The lid structure 30 is attachable to and detachable from the two sealing films 31 and 32 for sealing the upper end opening of the inner container body 10, the check valve 33 attached to the lower sealing film 31, and the outer container body 20. And a packing 36 disposed between the cap 35 and the upper sealing film 32.

Hereinafter, the manufacturing method of the said double container is demonstrated. Details of each component of the double container will be clarified in the description of the manufacturing method.
An inner container body 10 shown in FIG. 1 is prepared. The inner container body 10 includes a cylindrical (cylindrical) body 11 (inner body or inner side wall) made of a flexible and deformable resin film, and a body made of a film similar to the body 11. A flat bottom portion 12 (blocking portion or inner closing portion) that closes the lower end (base end or one end) of the body 11 and an upper end (tip or other end) of the body portion 11 in a circular shape (the upper end of the body portion 11 in the natural state) Resin-made shape holding portion 13 (reinforcing portion) for holding in a (cross-sectional shape) and resin-made for holding the lower end of the body portion 11 in a circular shape (a cross-sectional shape in the natural state of the lower end of the body portion 11) And a shape holding portion 14 (shape holding means, reinforcing portion).

The shape holding portions 13 and 14 are obtained by injection molding (insert molding) in a state where the body portion 11 and the bottom portion 12 are arranged in a mold, and have a sufficient level of rigidity to maintain their own shape. Have.
The upper annular shape holding portion 13 includes a short cylindrical portion 13a that is integrated with the outer periphery of the upper end portion of the body portion 11, and an annular flange portion 13b that projects radially and outwardly from the upper end of the short cylindrical portion 13a. Have.
The lower annular shape holding portion 14 has an annular shape and is integrated with the inner periphery of the lower end of the body portion 11 and the peripheral edge of the bottom portion 12.

In the first step, as shown in FIG. 1, the tablet 100 is supplied from the upper end opening of the inner container body 10.
Next, the resin seal film 31 shown in FIG. 1 is attached to the upper end surface of the flange portion 13b of the shape holding portion 13 of the inner container body 10 by means such as vibration welding or adhesion, so that the inner space of the inner container body 10 is formed. Seal.

  A thin check valve 33 is attached to the lower surface of the central portion of the seal film 31. This check valve 33 is well known as a gas discharge valve mounted on a food packaging container, has a built-in valve body made of a rubber diaphragm, and has a thickness of about 1 to 2 mm. ing. The seal film 31 is formed with a communication hole (not shown) that communicates with the port of the check valve 33.

  Next, as shown in FIG. 2A, the nozzle 50 of the suction device is put on the center of the seal 31 and deaeration is performed via the check valve 33. As a result, the internal space of the inner container body 10 is under negative pressure, and as shown in FIG. 2B, the body portion 11 of the inner container body 10 is contracted to reduce the internal volume, and the tablet 100 is immovably held tightly. To do. As described above, since the tablet 100 is only supplied to the inner container body 10 from above, the storage density is relatively low. In this embodiment, the supply level of the tablet 100 is slightly lower than the upper end of the inner container body 10. Therefore, the inner container body 10 contracts due to the negative pressure.

  In this embodiment, since the shape holding parts 13 and 14 maintain the circular shape of the upper end part and the lower end part of the trunk part 11, the shrinkage of the trunk part 11 in the radial direction is suppressed, and the shrinkage mainly shrinks in the axial direction.

Next, as shown in FIG. 3, the outer container body 20 is fixed to the inner container body 10. The outer container body 20 includes a cylindrical (cylindrical) body portion 21 (outer body portion or outer side wall) made of a flexible and deformable resin film, and a body portion made of a film similar to the body portion 21. 11 is a flat bottom portion 22 (closed portion or outer closed portion) that closes the lower end (base end or one end) of the eleventh portion, and the upper end (leading end or other end) of the barrel portion 21 is circular (the upper end of the barrel portion 21 in the natural state Resin short cylindrical shape (annular) shape holding portion 23 (reinforcing portion) for holding in a cross-sectional shape), and the lower end of the barrel portion 21 is circular (the sectional shape in the natural state of the upper end of the barrel portion 21) And a resin-made annular (annular) shape retaining portion 24 (reinforcing portion). The outer container body 20 is obtained by the same manufacturing method as the inner container body 10.
A male screw 23 a is formed on the outer periphery of the shape holding portion 23 of the outer container body 20.

The inner periphery of the upper end of the shape holding part 23 of the outer container body 20 is welded to the outer periphery of the flange 13b of the shape holding part 13 of the inner container body 10 using an ultrasonic wave, high frequency, heat, laser, vibration, or an adhesive. The outer container body 20 is attached to the inner container body 10, and the space 40 between the two is sealed. In addition, an adhesive tape, a fitting, etc. can be selected as a fixing means of container bodies 10 and 20.
The flange part 13b of the shape holding part 13 is a spacer (space formation) for arranging the body part 11 of the inner container body 10 and the body part 21 of the outer container body 20 coaxially in a state of being separated over the entire circumference. Function). This spacer may be separated from the inner container body 10 before the fixing process of the outer container body 20.

  The outer diameter (indicated by D1 in FIG. 1) of the trunk portion 11 of the inner container body 10 is a predetermined amount from the inner diameter (indicated by D2 in FIG. 3) of the trunk portion 21 of the outer container body 20. It is smaller by ΔD. Therefore, even if the shrinkage in the radial direction of the body portion 11 of the inner container body 10 is suppressed in the degassing step, the entire space between the body portion 11 of the inner container body 10 and the body portion 21 of the outer container body 20 is not reduced. A sufficient gap (a gap that prevents an external impact through the outer container body 20 from being transmitted to the inner container body 10 as will be described later) is secured over the circumference.

  Moreover, since the trunk | drum 11 of the inner container body 10 shrinks to an axial direction in the said deaeration process, sufficient clearance gap is also formed between the bottom part 12 of the inner container body 10, and the bottom part 22 of the outer container body 20. FIG. . Since the radial contraction of the body portion 11 of the inner container body 10 is suppressed, the amount of axial contraction can be controlled, and the height of the inner container body 10 in the natural state can be obtained so that a sufficient gap is obtained between the bottom portions 11 and 21. Can be determined.

  Next, the cap 35 shown in FIG. 3 is attached to the outer container body 20. The cap 35 has a flat top wall 35a and a skirt portion 35b extending downward from the periphery of the top wall 35a. A female screw 35c is formed on the inner periphery of the skirt portion 35b, and an annular convex portion 35d is formed above the female screw 35c.

A disc-shaped packing 36 is disposed below the top wall 35 a of the cap 35. The packing 36 is supported by sandwiching the peripheral edge between the top wall 35a of the cap 35 and the projection 35d.
A resin sealing film 32 is attached to the lower surface of the packing 36 with a weak adhesive force.

As shown in FIG. 4, the cap 35 is attached to the outer container body 20 by screwing the female screw 35 c of the cap 35 with the male screw 23 a of the outer container body 20.
In the mounting state of the cap 35 to the outer container body 20, the peripheral portions of the seal films 31 and 32 in an overlapped state are joined using welding, adhesive, or the like by ultrasonic, high frequency, heat, vibration, etc. A double container is completed.

In the double container having the above structure, the inner container body 10 tightly holds the tablet 100, so that the tablets 100 do not collide with each other. Further, the body portion 11 and the bottom portion 12 of the inner container body 10 are separated from the body portion 21 and the bottom portion 22 of the outer container body 20 through a sufficient gap, so that an external impact is not directly applied to the tablet 100. As a result, the tablet 100 can be prevented from being damaged during the conveyance of the double container.
Moreover, the said double container can obtain a heat insulation effect by the space 40 between the outer container body 10 and the inner container body 20 and the space between the sealing films 31, 32 and the cap 35, and the tablet from heat. 100 can be protected.

  Although the trunk | drum 21 of the outer container body 20 has a softness | flexibility, since the space 40 between the outer container body 20 and the inner container body 10 is sealed, a cylindrical shape can be hold | maintained and the outer container body 20 A sufficient gap can be secured between the inner container body 10 and the inner container body 10.

  Since the internal space of the inner container body 10 is sealed with the sealing films 31 and 32 with a negative pressure, the tablet 100 can be stored well.

  In addition, it is preferable that the lower seal film 31 is formed of a laminated film, and the body portion 11 and the bottom portion 12 of the inner container body 10 are formed of a laminated film. This laminated film is made of, for example, a metal foil such as aluminum and a resin layer laminated on both sides thereof. When the film has a barrier property (permeation preventing property) against water vapor and oxygen, the tablet 100 is made even better. Can be saved. The laminated film will be described in detail later.

You may form the trunk | drum 21 and the bottom part 12 of the outer container body 20 with the said laminated | multilayer film instead of the said inner container body 10 or with the inner container body 10. FIG. Instead of the seal film 31 or together with the seal film 31, the seal film 32 may also be formed of the laminated film.
The material used for the shape holding members 13, 14, 23, and 24 may be any material that can be injection-molded, and is a single-layer film or a laminated film used for the body parts 11, 21, bottom parts 12, 22 and seal films 31, 32. And a resin that can be joined.

The cap 35 is removed from the outer container body 20 during use. At this time, the weak adhesion between the packing 36 and the seal 32 is eliminated. Next, the upper end opening of the inner container body 10 is opened by removing the seals 31 and 32, and the tablet 100 is taken out.
When the cap 35 is reattached to the outer container 20 after the seals 31 and 32 are removed, the packing 36 contacts the flange 13b of the inner container body 10 while being elastically deformed.

  After the tablet 100 has been used up, the body part 11 of the inner container body 10 and the body part 21 of the outer container body 20 have flexibility, so that they can be crushed and discarded, and the volume of dust can be reduced. be able to. At the time of disposal, a hole may be made in the outer container body 20 to make it easier to crush.

FIG. 5 shows a second embodiment of the present invention. In this embodiment, the shape holding portions 13 and 23 of the inner container body 10 and the outer container body 20 are welded together before the deaeration process. The supply of the tablet 100 and the welding of the seal film 31 are preferably performed after the inner container body 10 and the outer container body 20 are mutually fixed, but may be performed before. A vent hole 13 x is formed in the flange portion 13 b of the inner container body 10.
Since the other structures of the inner container body 10 and the outer container body 20 are the same as those in the first embodiment, the same numbers are assigned in the drawing and the description thereof is omitted.

  When deaeration is performed, the internal space of the inner container body 10 becomes a negative pressure and the trunk portion 11 contracts as in the first embodiment. In this process, the volume of the space 40 ′ between the inner container body 10 and the outer container body 20 increases. However, since air is introduced from the vent hole 13x, the space 40 ′ is maintained at atmospheric pressure. This does not hinder the above deaeration work.

  After the deaeration, another seal film 32 is attached together with the cap in the same manner as in the first embodiment. Hereinafter, this will be described in detail with reference to FIG. In FIG. 6, the cap is omitted. The seal film 32 is overlapped on the seal film 31, and the peripheral portion thereof is welded or bonded to the peripheral portion of the seal film 31 and the upper surface of the flange portion 13b. In the present embodiment, since the peripheral edge portion of the seal film 32 closes the vent hole 13x, the space 40 'between the inner container body 10 and the outer container body 20 is maintained airtight.

In the said 2nd Embodiment, when the sealing film 32 does not block the vent hole 13x, it is preferable that the trunk | drum 21 of the outer container body 20 makes rigidity higher than 1st Embodiment.
In the second embodiment, as a spacer for maintaining a gap between the upper end of the body portion 11 of the inner container body 10 and the body portion 21 of the outer container body 20, air permeability is provided instead of the flange portion 13b of the inner container body 20. You may use the cyclic | annular net member which has.

  As shown in FIG. 7, the check valve 33 may be attached to the upper surface of the seal film 31 in the first and second embodiments.

  FIG. 8 shows a double container according to a third embodiment of the present invention. This embodiment has substantially the same configuration as the first embodiment and is manufactured by the same process, but only the mounting location of the check valve 33 is different. That is, a check valve 33 is provided at the bottom 12 of the inner container body 10, and deaeration is performed from the bottom 12. The check valve 33 may be attached to the outer surface of the bottom portion 12 as shown by a solid line in FIG. 8, or may be attached to the inner surface as shown by an imaginary line.

  As shown in FIG. 9, in the said 1st, 2nd embodiment, bottom part 12 'of the inner container body 10 is formed with a resin-made disk, and this is for hold | maintaining the circular shape of the lower end part of the trunk | drum 11. You may also use as a shape holding part (shape holding means).

Here, the laminated film used for all the above-mentioned films 11, 12, 21, 22, 31, 32 or the film selected as described above will be described. The laminated film has two base layers and an intermediate layer between them. The base layer is made of a resin film that can be welded to the shape holding portion simultaneously with the injection molding when the shape holding portion is injection-molded. A resin film with good adhesiveness is employed.
Usually, the film used as the base layer is polyolefin (such as low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, etc.), or a mixed resin thereof, ionomer, ethylene and acrylic acid ester or methacrylic acid. Copolymers with esters (eg ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-methyl methacrylate copolymer, ethylene-methacrylic acid copolymer), polymethylpentene, polybutene, biodegradation Examples thereof include unstretched films made of a reactive polyester (for example, a hydroxycarboxylic acid condensate such as polylactic acid, a diol and dicarboxylic acid condensate such as polybutylene succinate), and the like. Moreover, it is also possible to use a coextruded multilayer film provided with a heat-sealable resin layer on the sealing surface as necessary. The thickness of the base layer can be selected in the range of 10 to 200 μm, and it is desirable to select 15 to 100 μm.
In addition, when forming the trunk | drum 11 and 21, the bottom parts 12 and 22, and the sealing films 31 and 32 with a single layer film, it is also possible to use the material used for the said base layer alone.

The intermediate layer has a base material layer and / or a functional layer. As the base material layer, it is desirable to employ a resin film having high mechanical suitability such as puncture strength, tensile strength, impact strength strength, and printability. As such a film, for example, a film made of a synthetic resin such as polyester, polyamide, polypropylene, polyvinyl, ethylene-vinyl alcohol copolymer, polycarbonate, polyacetal, etc., or a synthetic multilayer of these synthetic resins. Examples include extruded films. These films may be unstretched films or stretched films stretched in a uniaxial direction or a biaxial direction. The film used as the base material layer is desirably a stretched film stretched in a uniaxial direction or a biaxial direction from the viewpoint of printability. Specific examples include stretched plastic films such as biaxially stretched polyethylene terephthalate (PET), biaxially stretched polyamide (ONY), and biaxially stretched polypropylene (OPP). Further, if necessary, synthetic paper, cellophane, paper, non-woven fabric and the like can be used. The thickness of a base material layer can be selected in the range of 6-100 micrometers, and it is preferable to set it as 12-30 micrometers.

  The material constituting the functional layer is appropriately selected according to required functions such as gas barrier properties, toughness, bending resistance, puncture resistance, impact resistance, wear resistance, cold resistance, heat resistance, chemical resistance, etc. Selected. Examples of the material constituting the functional layer include metal foils such as aluminum, iron, copper, and magnesium, polyethylene terephthalate, polyamide, polyvinyl chloride, polycarbonate, polyvinyl alcohol, ethylene-vinyl alcohol copolymer system, and polyvinylidene chloride. Or a film on which an inorganic material such as aluminum, silicon oxide, aluminum oxide, or magnesium oxide is vapor-deposited, a non-woven fabric having a heat insulating property, or a foamed film. The functional layer may be one layer or two or more layers. The thickness of a functional layer should just be the thickness which can satisfy | fill the function requested | required, and it is desirable to set it as 6-30 micrometers.

  As the co-extruded multilayer film, those having about 3 to 7 layers are used. For example, the following multilayer films can be mentioned. This multilayer film is a three-layer film composed of linear low-density polyethylene (LLDPE), polyamide (NY), and linear low-density polyethylene (LLDPE), which are sequentially arranged from one surface to the other. , Linear low density polyethylene (LLDPE), polyamide (NY), ethylene-vinyl alcohol copolymer (EVOH), polyamide (NY), and linear low density polyethylene (LLDPE). Moreover, when the coextruded multilayer film is used, the step of laminating the intermediate layer can be omitted.

  The present invention is not limited to the above-described embodiments, and various aspects can be adopted. For example, the tablet 100 (contents) may be supplied to such an extent that the internal space of the inner container body 10 in the natural state is substantially filled. In this case, the amount of shrinkage of the body portion 11 of the inner container body 10 is small. Thus, even if the amount of contraction of the body part 11 is small, the difference between the outer diameter of the body part of the inner container body 10 and the inner diameter of the outer container body 20 in a natural state is sufficiently secured in advance, and the height of the body parts 11 and 12 is increased. If the difference is sufficiently secured in advance, a double container capable of preventing the tablet 100 from being damaged can be obtained. In this case, the shape holding means at the lower end of the trunk portion 11 may be omitted.

The upper seal film 32 may be attached to the inner container body before the cap is attached.
The upper sealing film 32 may be omitted.
The body portion of the inner container body and the outer container body may have a cylindrical shape with a polygonal cross section, or may have a shape (cone, polygonal pyramid shape) whose diameter decreases toward the bottom.

The material of the cap is not particularly limited as long as it is a hard plastic.
General engineering plastics and super engineering plastics can also be used as the material for the laminated film.

  The contents contained in the double container of the present invention include those in the form of granules such as tablets and capsules, and also include microcapsules and the like.

  The double container of the present invention can be used as a container for storing granular materials such as tablets such as drugs and supplements and powdered materials such as microcapsules.

10 inner container body 11 trunk section 12 bottom section 12 'bottom section (shape holding section, shape holding means)
13 Upper shape holding portion 14 Lower shape holding portion (shape holding means)
20 outer container body 21 trunk portion 22 bottom portion 23 upper shape holding portion 24 lower shape holding portion 31, 32 seal film 33 check valve 35 cap 40, 40 ′ space 100 between inner container body and outer container body Tablet (contents)

Claims (6)

An inner container body that has a body portion and a closed portion that closes the base end of the body portion, and contains the contents in the internal space; and a body portion and a closed portion that closes the base end of the body portion, and the inner container body An outer container body to be accommodated and a lid structure that hermetically closes an opening at the distal end of the body portion of the inner container body, and the distal ends of the outer container body and the body portion of the inner container body are fixed to each other. In a double container,
The body portion of the inner container body has a cylindrical shape and has flexibility, and its outer diameter is smaller than the inner diameter of the body portion of the outer container body in a natural state,
At the base end of the body portion of the inner container body, a shape holding means for holding the cross-sectional shape of the base end in a natural state is provided,
The closing structure of the lid structure or the inner container body is provided with a check valve that is used when the internal space of the inner container body is set to a negative pressure,
The body portion of the inner container body is tightly held in the axial state by shrinking in the axial direction from the natural state while maintaining the cross-sectional shape of the base end due to the negative pressure in the inner space. An annular gap is formed between the body portion of the inner container body and the body portion of the outer container body, and a gap is also formed between the closed portion of the inner container body and the closed portion of the outer container body. A double container characterized in that is formed. The closed portion of the inner container body is also flexible, and an annular shape holding portion as the shape holding means is fixed to a boundary portion between the trunk portion and the closed portion of the inner container body. The double container according to claim 1 . The lid structure includes a seal film that hermetically closes the opening of the inner container body, and a cap that is attached to a distal end portion of the outer container body, and the check valve is provided on the seal film. The double container according to claim 1 or 2 . The body portion of the outer container body is flexible, and the shape holding portions for holding the cross-sectional shape of the distal end in the natural state are respectively provided at the distal ends of the inner container body and the body portion of the outer container body. provided, together with the shape-retaining portions thereof the inner container body and an outer container body is fixed, of claims 1 to 3 in which the space between the inner container body and an outer container body, characterized in that it is sealed The double container in any one. A flexible body portion that is cylindrical in a natural state, a closing portion that closes the base end of the body portion, and a shape holding means provided at the base end to hold the base end of the body portion in a circular shape; Prepare an inner container body having an annular shape holding portion fixed to the tip in order to hold the tip of the trunk portion in a circular shape ,
A cylindrical flexible barrel having an inner diameter larger than the outer diameter of the barrel of the inner container body, a closing portion that closes the proximal end of the barrel, and the barrel to hold the tip of the barrel circularly An outer container body having an annular shape holding part fixed to the tip of the
Supplying the contents to the inner container body ;
In the state where the inner container body contains the contents, a step of attaching the peripheral portion of the seal film provided with a check valve to the end surface of the shape holding portion of the inner container body, and
With the seal film attached to the inner container body, the inner space of the inner container body is degassed via the check valve, whereby the body portion of the inner container body is moved to its distal end and proximal end. While maintaining a circular shape, shrinking in the axial direction to tightly enclose the contents;
By fixing the shape retention portions of the distal end of the inner container body and the outer container body, and fixing the outer container body inner container body,
After the content supply step, the seal film attachment step, the deaeration step, and the content gas and outer container body fixing step , a cap is attached to the shape holding portion at the tip of the outer container body, and the seal Covering the film,
Bei to give a,
Accordingly, an annular gap is formed between the body portion of the inner container body and the body portion of the outer container body, and a gap is also formed between the closed portion of the inner container body and the closed portion of the outer container body. A method for producing a double container having A flexible body portion that is cylindrical in a natural state, a closing portion that closes the base end of the body portion, and a shape holding means provided at the base end to hold the base end of the body portion in a circular shape; Prepare an inner container body having an annular shape holding portion fixed to the tip in order to hold the tip of the trunk portion in a circular shape ,
A cylindrical flexible barrel having an inner diameter larger than the outer diameter of the barrel of the inner container body, a closing portion that closes the proximal end of the barrel, and the barrel to hold the tip of the barrel circularly An outer container body having an annular shape holding part fixed to the tip of the
Supplying the contents to the inner container body ;
In the state where the inner container body contains the contents, a step of attaching the peripheral portion of the seal film provided with a check valve to the end surface of the shape holding portion of the inner container body, and
With the seal film attached to the inner container body, the inner space of the inner container body is degassed via the check valve, whereby the body portion of the inner container body is moved to its distal end and proximal end. While maintaining a circular shape, shrinking in the axial direction to tightly enclose the contents;
The outer container body is fixed to the inner container body by fixing the inner container body holding the contents and the shape holding portions at the tips of the outer container body, and between the outer container body and the inner container body. Sealing the space of
Attaching a cap to the shape holding portion at the tip of the outer container body and covering the sealing film;
In order,
Accordingly, an annular gap is formed between the body portion of the inner container body and the body portion of the outer container body, and a gap is also formed between the closed portion of the inner container body and the closed portion of the outer container body. A method for producing a double container having

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