JP2018012511A - Delamination container - Google Patents

Abstract

An object of the present invention is to provide a delamination container in which deterioration of discharge properties when the amount of contents is small is suppressed. According to the present invention, a delamination including a container main body having an outer shell and an inner bag and shrinking as the contents are reduced, and a plug member attached to the container main body. The container body includes a container having a container for accommodating the contents, and a mouth having an opening for discharging the contents from the container, and the plug member is attached to the mouth. A delamination container is provided in which a close-contact portion is provided in which the entire circumference of the plug member is in close contact with the container body at a position closer to the housing portion than the center in the height direction of the mouth portion. [Selection] Figure 1

Description

  The present invention relates to a delamination container in which an inner bag shrinks with a decrease in contents.

  There is also known a delamination container that includes an outer shell and an inner bag and that shrinks as the contents are reduced (for example, Patent Document 1). In such a container, it is assumed that the contents are discharged by compressing the outer shell, and the outer shell is restored to the original shape after the contents are discharged.

JP2015-131687A

  However, when the inventor evaluated the discharge performance of the container of Patent Document 1, it was found that the discharge performance of the contents may be remarkably deteriorated when the amount of the contents is small.

  This invention is made | formed in view of such a situation, and provides the lamination peeling container in which the deterioration of the discharge property when the quantity of the content remains few is suppressed.

  According to the present invention, there is provided a delamination container including a container body having an outer shell and an inner bag, and the inner bag shrinks as the contents are reduced, and a stopper member attached to the container body. The container body includes an accommodating portion for accommodating the contents, and an opening having an opening for discharging the contents from the accommodating portion, and the plug member is attached to the opening, A delamination container is provided in which a close contact portion is provided in which the entire circumference of the stopper member is in close contact with the container body at a position closer to the housing portion than the center in the height direction.

  As a result of diligent investigations, the present inventor has found that the discharge of the contents deteriorates when the amount of the contents decreases because the inner bag is difficult to separate from the outer shell at the mouth. And based on this knowledge, by providing a close contact portion where the entire circumference of the stopper member is in close contact with the container body at a position closer to the housing portion than the center in the height direction of the mouth portion, there is no space in the mouth portion or Since the volume is reduced, it has been found that the deterioration of dischargeability when the amount of the content is small is suppressed, and the present invention has been completed.

Hereinafter, various embodiments of the present invention will be exemplified. The following embodiments can be combined with each other.
Preferably, the container main body includes a constricted portion in which the container main body is constricted toward the inside, and the close-contact portion is provided in the constricted portion.
Preferably, the constricted part is provided at the base of the mouth part.
Preferably, the plug member is a pump having a cylindrical cylinder inserted into the mouth portion, the cylinder is in close contact with the container main body at the close contact portion, and the cylinder is accommodated in the housing more than the close contact portion. A communication hole penetrating the wall surface of the cylinder is provided at a position away from the part.
Preferably, the plug member is a cap having a cylindrical inner ring that is inserted into the mouth portion, and the inner ring is in close contact with the container body at the close contact portion.
Preferably, the outer shell includes an outside air introduction hole communicating with the external space of the container body at a position farther from the opening than the close contact portion.
Preferably, the plug member includes a check valve.

(A) is a front view of the container main body 3 of the lamination peeling container 1 of 1st Embodiment of this invention, (b) is AA sectional drawing in (a). (A) is sectional drawing corresponding to FIG.1 (b) which shows an example of the cap 23 with which the opening part 9 of the container main body 3 is mounted | worn, and an example of the pump 22 with which the opening part 9 of the container main body 3 is mounted | worn FIG. 2 is a cross-sectional view corresponding to FIG. It is sectional drawing corresponding to FIG.1 (b) in the state which attached the pump 22 and the cap 23 to the container main body 3. FIG. (A) is a front view of the container main body 3 of the delamination container 1 of the second embodiment of the present invention, and (b) is a state in which the valve member 4 is attached to the container main body 3 in (a). It is AA sectional drawing. It is sectional drawing corresponding to FIG.4 (b) which shows an example of the cap 23 with which the opening | mouth part 9 of the container main body 3 is mounted | worn. FIG. 5 is a cross-sectional view corresponding to FIG. 4B in a state where a cap 23 is attached to the container body 3. (A) is a perspective view of the valve member 4, (b) is sectional drawing for demonstrating the function of the valve member 4. FIG. It is sectional drawing corresponding to FIG. 3 which shows the conventional lamination peeling container without the contact part 28. FIG. It is sectional drawing corresponding to FIG. 5 which shows the structure of the conventional cap 23. FIG. It is sectional drawing corresponding to FIG. 6 which shows the state with which the conventional cap 23 was mounted | worn with the opening | mouth part 9 of the container main body 3. FIG.

  Hereinafter, embodiments of the present invention will be described. Various characteristic items shown in the following embodiments can be combined with each other. The invention is established independently for each feature.

1. First Embodiment As shown in FIGS. 1 to 3, a delamination container 1 according to a first embodiment of the present invention includes a container body 3, a pump 22, and a cap 23. The container body 3 includes a storage portion 7 that stores the contents, and a mouth portion 9 that has an opening 9 b that discharges the contents from the storage portion 7. In the present embodiment, the pump 22 corresponds to a “plug member” in the claims.

  As shown in FIG. 1 (b), the container body 3 includes an outer layer 11 and an inner layer 13 in the housing portion 7 and the mouth portion 9, and the outer shell 11 is formed by the outer layer 11, and the inner bag 14 is formed by the inner layer 13. Is configured. As the contents decrease, the inner layer 13 moves away from the outer layer 11, whereby the inner bag 14 moves away from the outer shell 12 and contracts. In addition, before accommodating the content in the accommodating part 7, the preliminary | backup peeling process which peels the inner layer 13 from the outer layer 11 may be performed. In this case, after the preliminary peeling, the inner layer 13 is brought into contact with the outer layer 11 by blowing air into the accommodating portion 7 or accommodating the contents. And the inner layer 13 leaves | separates from the outer layer 11 with the content reduction. On the other hand, when the preliminary peeling step is not performed, the inner layer 13 is peeled from the outer layer 11 and separated from the outer layer 11 when the contents are discharged.

  The outer layer 11 is composed of, for example, low density polyethylene, linear low density polyethylene, high density polyethylene, polypropylene, an ethylene-propylene copolymer, and a mixture thereof. The outer layer 11 may have a multi-layer configuration. For example, a configuration in which both sides of the repro layer are sandwiched between layers formed of a virgin material may be used. Here, the repro layer refers to a layer that is used by recycling burrs produced during the molding of the container. Moreover, the outer layer 11 is formed thicker than the inner layer 13 so that the restoring property becomes high.

  The inner layer 13 includes an EVOH layer provided on the container outer surface side, an inner surface layer provided on the container inner surface side of the EVOH layer, and an adhesive layer provided between the EVOH layer and the inner surface layer. By providing the EVOH layer, the gas barrier property and the peelability from the outer layer 11 can be improved. The adhesive layer may be omitted.

  The EVOH layer is a layer made of an ethylene-vinyl alcohol copolymer (EVOH) resin, and is obtained by hydrolysis of ethylene and vinyl acetate copolymer. The ethylene content of the EVOH resin is, for example, 25 to 50 mol%, and preferably 32 mol% or less from the viewpoint of oxygen barrier properties. Although the minimum of ethylene content is not prescribed | regulated, since the softness | flexibility of an EVOH layer tends to fall, so that ethylene content is small, 25 mol% or more is preferable.

  An inner surface layer is a layer which contacts the contents of the lamination peeling container 1, for example, a low density polyethylene, a linear low density polyethylene, a high density polyethylene, a polypropylene, an ethylene-propylene copolymer, a cycloolefin polymer, and a mixture thereof. It is preferably made of polyolefin such as low density polyethylene or linear low density polyethylene.

  The adhesive layer is a layer having a function of adhering the EVOH layer and the inner surface layer. For example, an acid-modified polyolefin having a carboxyl group introduced into the above-described polyolefin (eg, maleic anhydride-modified polyethylene), ethylene acetate It is a vinyl copolymer (EVA). An example of the adhesive layer is a mixture of low-density polyethylene or linear low-density polyethylene and acid-modified polyethylene.

  The mouth portion 9 is provided with an engaging portion 9d that can be engaged with the cap 23 illustrated in FIG. The cap 23 may be a stopper type or a screw type. In addition, a constricted portion 9a in which the container body is constricted inward is provided at the base of the mouth portion 9.

  As shown in FIG. 2A, the cap 23 includes an upper portion 23t, an insertion hole 23k provided in the upper portion 23t, a cylindrical portion 23f extending in a cylindrical shape from the outer periphery of the upper portion 23t, and an inner peripheral surface of the cylindrical portion 23f. The engaging part 23c provided along is provided. The engaging portion 23 c is an annular protrusion that can be engaged with the engaging portion 9 d of the mouth portion 9.

  As shown in FIG. 2B, the pump 22 has a cylindrical cylinder 24 inserted into the mouth portion 9 and a cylindrical cylinder that can slide in the cylinder 24 and suck up the contents in the container body 3. A piston 26, a cylindrical liquid introduction pipe 25 that guides the contents in the container body 3 to the cylinder 24, and a nozzle head 27 having a discharge port 27 a that discharges the contents sucked up by the piston 26 are provided. The piston 26 is always urged upward (in a direction away from the suction port 24 c of the cylinder 24) by a coil spring 31 housed in the cylinder 24. A check valve 32 is built in the cylinder 24 so that the contents in the accommodation space 24 d of the cylinder 24 do not flow back into the container body 3. A check valve 33 is also provided in the path from the accommodation space 24d to the discharge port 27a so that outside air does not enter the accommodation space 24d.

  The cylinder 24 is provided with a communication hole 24 a that passes through the wall surface of the cylinder 24. This communication hole 24a is provided to prevent the inside of the container from being depressurized by introducing outside air into the container when the contents are sucked up in a container (non-peeling container) in which the inner layer does not peel. In the delamination container as in this embodiment, it is necessary to prevent outside air from being introduced into the inner bag 14 when the contents are sucked up, so the communication hole 24a is unnecessary, but in this embodiment, Since the pump used for the non-peeling container is used, the communication hole 24a is provided.

  As shown in FIG. 3, in a state where the pump 22 and the cap 23 are mounted on the container main body 3, the cylinder 24 does not enter the container main body 3 due to the flange 24 b of the cylinder 24 coming into contact with the opening end of the mouth portion 9. It is like that. Further, by engaging the engaging portion 23c of the cap 23 with the engaging portion 9d of the mouth portion 9 while the flange 24b is sandwiched between the mouth portion 9 and the cap 23, the pump 22 and the cap 23 are opened. Mounted on the part 9. Further, in this state, the entire circumference of the cylinder 24 in the constricted portion 9 a is a close contact portion 28 that is in close contact with the inner surface of the container body 3. A mouth space 29 that is a space in the mouth portion 9 is airtightly separated from a housing space 34 that is a space in the housing portion 7 by the contact portion 28. The communication hole 24 a is disposed in the mouth space 29.

  As shown in FIG. 1, the accommodating part 7 is provided with a recess 7a, and an outside air introduction hole 15 is provided in the recess 7a. The outside air introduction hole 15 is a through hole provided only in the outer shell 12, and communicates the intermediate space 21 between the outer shell 12 and the inner bag 14 and the outer space S of the container body 3. Further, an air circulation groove 7b extending from the recess 7a toward the mouth 9 is provided so that the recess 7a is not sealed with the shrink film.

Here, the effect of the lamination peeling container 1 of this embodiment is demonstrated.
After the contents are accommodated in the accommodating portion 7, as shown in FIG. 3, when the nozzle head 27 is pushed down with the pump 22 and the cap 23 attached, the contents in the accommodating space 24d of the cylinder 24 are discharged from the discharge port 27a. It is discharged from. Thereafter, when the hand is released from the nozzle head 27, the piston 26 is moved upward by the urging force of the coil spring 31, and the inside of the accommodation space 24d is decompressed. As a result, the check valve 32 is opened and the contents are sucked into the accommodation space 24d.

  When the contents are sucked up, the inner bag 14 contracts, but the inner bag 14 has a certain level of restoring force. Therefore, in the conventional delamination container as shown in FIG. Outside air flows into the inner bag 14 through 24a. For this reason, in order to prevent inflow of the outside air into the inner bag 14, it is necessary to perform a process of closing the communication hole 24a or to develop a dedicated pump not provided with the communication hole 24a. On the other hand, in the present embodiment, the communication hole 24a is disposed in the mouth space 29, and the mouth space 29 is airtightly separated from the housing space 34 by the contact portion 28. The outside air does not flow into 34. Therefore, a general pump used in the non-peeling container can be used as it is in the laminated peeling container of this embodiment.

  As the contents are sucked up, the outer shell 12 also contracts. However, since the outer shell 12 is provided with the outside air introduction hole 15, the outside air is quickly introduced into the intermediate space 21 through the outside air introduction hole 15. Then, the outer shell 12 returns to its original shape while being peeled from the inner bag 14 by the restoring force of the outer shell 12.

  Through the above steps, the contents in the container body 3 are discharged from the discharge port 27a, and the inner bag 14 is separated from the outer shell 12 and contracts.

  By the way, in the conventional delamination container without the contact portion 28 as shown in FIG. 8, the contents may move to the mouth space 29 due to the container lying down or rising due to the shrinkage of the inner bag 14. Since the inner bag 14 is unlikely to be peeled off from the outer shell 12 at the mouth portion 9, the contents moved to the mouth space 29 become difficult to be ejected, resulting in a phenomenon in which the ejectability is deteriorated when the amount of the contents is small. Cheap. Such a phenomenon becomes particularly remarkable when the viscosity of the contents is high. On the other hand, in the present embodiment, the mouth space 29 is hermetically separated from the accommodation space 34 by the contact portion 28, so that the contents do not move to the mouth space 29. For this reason, the deterioration of the discharge property when the amount of contents is small is suppressed.

The present invention can also be implemented in the following modes.
In the above embodiment, the constricted portion 9a is provided at the base of the mouth portion 9, but the constricted portion 9a may be provided at a portion other than the base.
In the above embodiment, the close contact portion 28 is provided in the constricted portion 9a, but the close contact portion 28 may be provided in a portion other than the constricted portion 9a.
In the above embodiment, the close contact portion 28 is provided at the base of the mouth portion 9, but the close contact portion 28 is accommodated more than the center C in the height direction of the mouth portion 9 (shown in FIG. 1A). You may provide in the arbitrary positions near the part 7. FIG. The close contact portion 28 may be provided in the mouth portion 9 or in the accommodating portion 7. By providing the contact portion 28 at a position closer to the housing portion 7 than the center C in the height direction of the mouth portion 9, the mouth space 29 is completely eliminated or the volume of the mouth space 29 is reduced more than before. Therefore, the effects described in the above embodiment can be obtained.
-In the said embodiment, although the pump which discharges the content as it is is used, you may use the foam pump which bubbles and discharges the content.
-The structure of the pump and cap of the said embodiment is an example, You may use the pump of another structure, and when a cap is unnecessary, it is omissible.
In the above embodiment, the outside air introduction hole 15 is provided in the housing portion 7, but the outside air introduction hole 15 may be provided at an arbitrary position farther from the opening 9 b of the mouth portion 9 than the close contact portion 28. it can.
In the above embodiment, no valve is attached to the outside air introduction hole 15, but a valve capable of inflowing outside air into the intermediate space 21 may be attached.

2. Second Embodiment A delamination container according to a second embodiment of the present invention will be described with reference to FIGS. This embodiment is similar to the first embodiment, and is mainly different in that the contents are discharged through a cap 23 having a check valve instead of the pump 22. Hereinafter, the difference will be mainly described. In the present embodiment, the cap 23 corresponds to a “plug member” in the claims.

  In the first embodiment, the contents are discharged by depressing the pump 22, but since the present embodiment does not have the pump 22, the contents are discharged by compressing the outer shell 12 by inverting the container. .

  The configuration of the container body 3 is substantially the same as that of the first embodiment, but the diameter of the mouth portion 9 is larger in this embodiment. In the present embodiment, a cap 23 shown in FIG.

  As shown in FIG. 5, the cap 23 includes a cap body 23a and a cap cover 23i. The cap main body 23a and the cap cover 23i are connected at a connecting portion 23j, and the cap cover 23i can be opened and closed. The cap body 23a includes an upper part 23t, a discharge port 23b provided in the upper part 23t, a cylindrical part 23f extending in a cylindrical shape from the outer periphery of the upper part 23t, and an engaging part provided along the inner peripheral surface of the cylindrical part 23f. 23c, an inner ring 23d that extends in a cylindrical shape from the upper portion 23t inside the cylindrical portion 23f, a flow passage 23g that is provided inside the inner ring 23d and communicates with the discharge port 23b, and an inner ring that is provided in the flow passage 23g. An annular valve seat 23r extending inward from 23d and a check valve 23e are provided. The check valve 23e has a valve body 23e1 that closes the discharge hole 23r1 formed at the center of the annular valve seat 23r, and a plurality of elastic members that extend from the inner ring 23d toward the center in the radial direction and elastically support the valve body 23e1. It has a piece 23e2. Then, the check valve 23e is opened by the valve body 23e1 being pushed up from the discharge hole 23r1 by the pressure increase in the accommodating portion 7.

  The engaging portion 23 c is an annular protrusion that can be engaged with the engaging portion 9 d of the mouth portion 9. In a state where the cap 23 is attached to the mouth portion 9, the contents in the storage portion 7 are discharged from the discharge port 23b through the flow passage 23g. On the other hand, since the check valve 23e blocks the inflow of the outside air from the discharge port 23b, the outside air does not enter the inner bag 14 of the container body 3, and the deterioration of the contents is suppressed.

  The cap 23 of this embodiment shown in FIG. 5 is characterized in that the inner ring 23d is longer than the conventional cap 23 as shown in FIG. 9, and the inner ring 23d of this embodiment is shown in FIG. As described above, the constricted portion 9 a provided at the base of the mouth portion 9 is configured to be in close contact with the inner layer 13. For this reason, the constriction part 9a is provided with the contact | adherence part 28 where the perimeter of the inner ring 23d closely_contact | adheres to the inner surface of the container main body 3. FIG. A mouth space 29 that is a space in the mouth portion 9 is airtightly separated from a housing space 34 that is a space in the housing portion 7 by the contact portion 28. The inner ring 23d preferably has a length that protrudes from the cylindrical portion 23f.

  As shown in FIG. 4B, the valve member 4 is provided in the recess 7 a of the housing portion 7. As shown to Fig.7 (a), the valve member 4 is provided in the intermediate space 21 side of the axial part 8a arrange | positioned in the external air introduction hole 15, and the axial part 8a, and its cross-sectional area is larger than the axial part 8a. A lid portion 8c and a locking portion 8b provided on the outer space S side of the shaft portion 8a and preventing the valve member 4 from entering the intermediate space 21 are provided. The valve member 4 can be attached to the container main body 3 by inserting the lid portion 8c into the intermediate space 21 while the lid portion 8c widens the outside air introduction hole 15. Therefore, it is preferable that the tip of the lid portion 8c has a tapered shape. Since such a valve member 4 can be mounted simply by pushing the lid portion 8c into the intermediate space 21 from the outside of the container body 3, it is excellent in productivity.

  The lid portion 8c is configured to substantially close the outside air introduction hole 15 when the outer shell 12 is compressed, and has a shape in which the cross-sectional area decreases as the shaft portion 8a is approached. The locking portion 8b is configured such that air can be introduced into the intermediate space 21 when the outer shell 12 is restored after being compressed. When the outer shell 12 is compressed, the pressure in the intermediate space 21 becomes higher than the external pressure, and the air in the intermediate space 21 leaks out from the outside air introduction hole 15. The lid 8c moves toward the outside air introduction hole 15 due to the pressure difference and the air flow, and the lid 8c closes the outside air introduction hole 15 as shown in FIG. Since the cross-sectional area becomes smaller as the lid portion 8c approaches the shaft portion 8a, the lid portion 8c easily fits into the outside air introduction hole 15 and closes the outside air introduction hole 15.

  When the outer shell 12 is further compressed in this state, the pressure in the intermediate space 21 is increased. As a result, the inner bag 14 is compressed and the contents in the inner bag 14 are discharged. Further, when the compressive force applied to the outer shell 12 is released, the outer shell 12 tries to recover by its own elasticity. At this time, the lid portion 8 c is separated from the outside air introduction hole 15, the outside air introduction hole 15 is released from being blocked, and outside air is introduced into the intermediate space 21. Further, a flow passage 8d is provided in the locking portion 8b so that the locking portion 8b does not block the outside air introduction hole 15, and even when the locking portion 8b is in contact with the outer shell 12, the flow is prevented. Outside air can be introduced into the intermediate space 21 through the path 8 d and the outside air introduction hole 15.

  By the way, since the inner bag 14 is not easily peeled from the outer shell 12 at the mouth portion 9, in the conventional delamination container as shown in FIG. 9, the inner bag 14 is difficult to shrink. For this reason, when the container is turned upside down, the contents that enter the mouth space 29 are not easily discharged, and a phenomenon that the discharge performance is deteriorated easily occurs when the amount of the contents is small. On the other hand, in the present embodiment, the mouth space 29 is hermetically separated from the accommodation space 34 by the contact portion 28, so that the contents do not move to the mouth space 29. For this reason, the deterioration of the discharge property when the amount of contents is small is suppressed.

This embodiment can also be implemented in the following aspects.
In the above embodiment, the valve member 4 is configured to open and close the outside air introduction hole 15 by opening and closing the gap between the edge of the outside air introduction hole 15 and the valve member 4 by the movement of the valve member 4. Alternatively, the valve member itself may be provided with a through hole and a valve that can be opened and closed, and the outside air introduction hole 15 may be opened and closed by opening and closing the through hole by the action of the valve.

1: Laminated peeling container 3: Container body 4: Valve member 7: Accommodating part 7a: Recessed part 7b: Air flow groove 8a: Shaft part 8b: Locking part 8c: Lid part 8d: Flow passage 9: Mouth part 9a: Constriction part 9b: Opening part 9d: Engaging part 11: Outer layer 12: Outer shell 13: Inner layer 14: Inner bag 15: Outside air introduction hole 21: Intermediate space 22: Pump 23: Cap 23a: Cap body 23b: Discharge port 23c: Engagement Part 23d: Inner ring 23e: Check valve 23e1: Valve body 23e2: Elastic piece 23f: Tube part 23g: Flow passage 23i: Cap cover 23j: Connection part 23k: Insertion hole 23r: Annular valve seat 23r1: Discharge hole 23t: Upper part 24: Cylinder 24a: Communication hole 24b: Flange 24c: Suction port 24d: Storage space 25: Liquid introduction pipe 26: Piston 27: Nozzle head 27a: Discharge port 28: Close Part 29: mouth portion space 31: coil spring 32: check valve 33: check valve 34: accommodation space C: Central S: external space

Claims (7)

A container body having an outer shell and an inner bag, and the inner bag shrinks as the contents are reduced, and a delamination container including a stopper member attached to the container body,
The container body includes a storage portion that stores the contents, and a mouth portion that has an opening that discharges the contents from the storage portion.
The plug member is attached to the mouth,
A delamination container in which a close contact portion in which the entire circumference of the plug member is in close contact with the container body is provided at a position closer to the housing portion than the center in the height direction of the mouth portion. The container body includes a constricted portion in which the container body is constricted inward,
The delamination container according to claim 1, wherein the contact portion is provided in the constricted portion.   The delamination container according to claim 2, wherein the constricted portion is provided at a base of the mouth portion. The plug member is a pump having a cylindrical cylinder inserted into the mouth portion,
The cylinder is in close contact with the container body at the close contact portion;
The delamination container according to any one of claims 1 to 3, wherein the cylinder includes a communication hole penetrating the wall surface of the cylinder at a position farther from the accommodating portion than the close contact portion. The plug member is a cap having a cylindrical inner ring inserted into the mouth portion,
The delamination container according to any one of claims 1 to 3, wherein the inner ring is in close contact with the container main body at the close contact portion. The lamination according to any one of claims 1 to 5, wherein the outer shell includes an outside air introduction hole that communicates with an external space of the container body at a position farther from the opening than the close contact portion. Peeling container.   The said peeling member is a lamination peeling container as described in any one of Claims 1-6 provided with a non-return valve.