JP2018122860A - Delamination container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a delamination container which is structured to enable reduction in the hight of a mouth part thereof.SOLUTION: A delamination container 10 consists of cylindrical mouth parts 11 with air intake holes 12, outer layer parts 10a, which have body parts extending from the mouth parts 11, and inner layer parts 10b laminated inside of the outer layer parts 10a, which are volume decrease deformable and also are detachable from the outer layer part. Characteristically, detachment suppression parts 14 are arranged on the inner peripheral surface of the mouth parts 11, located closer to upper opening parts 11d than the air intake holes 12, protruding toward the body parts.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a laminated peeling container including an outer layer body that has an outside air introduction hole in the mouth and forms an outer shell of the container, and an inner layer body that is peelably laminated on the inner side of the outer layer body.

  As a container for storing cosmetics such as lotion, shampoo, rinse, liquid soap, food seasoning, etc., an outer layer body that has a cylindrical mouth and forms the outer shell of the container, and an inner side of the outer layer body A volume-deformable inner layer body that can be peeled and laminated, and with the discharge of the contents contained in the inner layer body, only the inner layer body is reduced while introducing outside air between the outer layer body and the inner layer body. There is known a delamination container (also referred to as a delamination container) that can be accommodated (see Patent Document 1).

  An outside air introduction hole is formed in the mouth portion of such a delamination container, and the outside air is taken into the internal space between the outer layer body and the inner layer body through the outside air introduction hole. A discharge cap is attached to the mouth of the delamination container, and the contents are discharged from the discharge port provided in the discharge cap. A valve body that opens and closes the flow path of the contents is disposed inside the discharge cap, and the valve body allows movement of the contents from the storage space to the discharge port and from the discharge port to the storage space. The contents and outside air are prevented from flowing in.

  In the delamination container having such a configuration, when the contents are discharged, the valve body prevents the outside air from flowing from the discharge port into the inner layer body (content storage space) and the intake air provided in the discharge cap. By introducing the outside air into the internal space between the outer layer body and the inner layer body from the hole through the outside air introduction hole at the mouth, only the inner layer body can be deformed and deformed. Therefore, the contents in the storage space of the container body can be discharged without being replaced with the outside air, thereby making it difficult for the contents remaining in the storage space of the container body to come into contact with air, and for deterioration or alteration of the contents. Can be suppressed.

JP 2008-162666 A

  By the way, in the laminated peeling container as described above, in order to introduce air from the outside air introduction hole of the mouth, the inner layer body is configured to be peelable from the outer layer body in the area of the outside air introduction hole. If peeling of the inner layer body reaches the upper end opening of the mouth, the following problems may occur. For example, an inner ring that fits into the upper end opening of the mouth from the inside inside the discharge cap cannot be inserted into the upper end opening, or when the discharge cap is attached to the mouth, the peeled inner layer body is pushed down. Airtightness may be impaired.

  For this reason, in order to prevent the peeling of the inner layer body from reaching the upper end opening of the mouth portion, a sufficient area for the outer layer body and the inner layer body to be in close contact with each other above the outside air introduction hole is secured in the mouth portion. As a result, it was difficult to reduce the height of the mouth.

  Therefore, an object of the present invention is to provide a delamination container having a configuration capable of reducing the height of the mouth.

The present invention has been made in order to solve the above-described problems, and the delamination container of the present invention includes an outer layer body having a cylindrical mouth portion in which an outside air introduction hole is formed and a trunk portion connected to the mouth portion. A volume-deformable inner layer body that is releasably laminated inside the outer layer body,
The inner peripheral surface of the mouth portion is provided with a peeling suppression portion that is located on the upper end opening side of the mouth portion from the outside air introduction hole and protrudes toward the body portion side. .

  Moreover, in the lamination peeling container of this invention, it is preferable that the said peeling suppression part is provided in the same circumferential direction position as the said external air introduction hole at least.

  Moreover, in the lamination peeling container of this invention, it is preferable that the said peeling suppression part is a cyclic | annular protrusion provided over the perimeter of the said opening part.

  Moreover, in the lamination peeling container of this invention, it is preferable that the outline in the longitudinal cross-sectional view which passes along the central axis of the said opening part is a substantially circular arc shape in the said peeling suppression part.

  Moreover, in the laminated peeling container of the present invention, it is preferable that a groove portion having a sharp outline in a longitudinal sectional view passing through the central axis of the mouth portion is formed on the outer edge portion of the peeling suppressing portion. .

Further, in the delamination container of the present invention, a straight line in which the contour line in the longitudinal sectional view passing through the central axis of the mouth part is substantially parallel to the central axis above the outside air introduction hole is provided in the mouth part. And a second straight portion having a diameter smaller than that of the first straight portion, which is connected to the first straight portion via a stepped portion above the first straight portion.
It is preferable that the peeling suppression portion is provided in the step portion.

  ADVANTAGE OF THE INVENTION According to this invention, the lamination peeling container which has the structure which can make the height of a mouth part small can be provided.

It is sectional drawing in the side view of the principal part in the state which attached the discharge cap to the lamination peeling container which is one Embodiment of this invention.

  Hereinafter, the present invention will be described in more detail with reference to the drawings. In the present specification, “upper” is the side (upper side in FIG. 1) where the discharge cap is positioned with respect to the container body when the discharge container is placed on a horizontal surface in a standing posture, and “lower”. Is the opposite side (the lower side of FIG. 1).

  FIG. 1 shows a state in which a discharge cap 20 is mounted on a container body 10 that is a delamination container according to an embodiment of the present invention to constitute a discharge container 1. An inner plug 30 and a valve body 40 are disposed inside the discharge cap 20, and a lid body 50 is provided on the discharge cap 20. The discharge container 1 can accommodate various contents.

  The container body 10 has a cylindrical mouth portion 11 and has a bottle shape in which a body portion is provided below the mouth portion 11. In addition, the shape of a trunk | drum is not specifically limited. Moreover, the mouth part 11 should just be a cylindrical shape, and is not limited to a cylindrical shape.

  In the present embodiment, the container body 10 has a double container structure including an outer layer body 10a and an inner layer body 10b accommodated inside the outer layer body 10a. The container body 10 can be formed by extrusion blow molding in which a laminated parison having a layer forming the outer layer body 10a and a layer forming the inner layer body 10b is blow-molded using a mold. That is, the container body 10 is a delamination container (a delamination container) in which the inner layer body 10b is laminated on the inner surface of the outer layer body 10a so as to be peelable.

  The inner layer body 10b is formed in a thin-walled bag shape that can be deformed and deformed by a synthetic resin material, for example, and is laminated on the inner surface of the outer layer body 10a so as to be peeled except for a part. The inner layer body 10b is arranged so as to wrap around to the vicinity of the outer edge of the upper end opening portion 11d of the mouth portion 11, and the inner side of the inner layer body 10b serves as an accommodation space S for contents.

  The outer layer body 10a is formed into a bottle shape having a predetermined rigidity by using, for example, a synthetic resin material, and constitutes an outer shell of the container body 10. The body portion of the outer layer body 10a can be pressed (squeezed) and has a restoring property to the original shape. The body portion of the outer layer body 10a may be configured so that it cannot be squeezed. In this case, the contents are discharged by using the weight of the contents by placing the container in an inverted posture or using a discharge tool having a pump mechanism. It is conceivable to suck up and discharge from the inside of the container.

  Further, the mouth portion 11 is provided with an outside air introduction hole 12 that penetrates the outer layer body 10a in the radial direction and communicates between the inner layer body 10b and the outer layer body 10a. In the case shown in the drawing, the two outside air introduction holes 12 are provided so as to face each other with the central axis of the mouth portion 11 interposed therebetween, but it is sufficient that at least one outside air introduction hole 12 is provided.

  In addition, the mouth portion 11 has a first straight portion 15 in which an outline of the outer surface in a longitudinal sectional view passing through the central axis of the mouth portion 11 is a straight line substantially parallel to the central axis above the outside air introduction hole 12. A first step portion 16 (step portion) that is continuous above the first straight portion 15 and that tapers upward, and is continuous above the first step portion 16 and substantially parallel to the central axis. A second straight portion 17 that is a straight line is provided. By having the first straight portion 15, the inner peripheral surface of the discharge cap 20 can be guided by the first straight portion 15 when plugging, so the discharge cap 20 is attached to the mouth portion 11 in a stable posture. be able to. Further, since the area of the second straight part 17 provided above the first straight part 15 via the first step part 16 has a smaller diameter than the area of the first straight part 15, the area from the lower side of the discharge cap 20 It becomes easy to insert the part 11. Further, since the first step portion 16 is an inclined surface, the discharge cap 20 can be attached to the mouth portion 11 more smoothly. In the present embodiment, a second step portion 18 is provided below the first straight portion 15, and the lower side of the second step portion 18 has a slightly larger diameter than the first straight portion 15. Yes.

  Further, the mouth portion 11 is provided with a separation suppressing portion 14 that protrudes from the inner peripheral surface to the trunk portion side (downward) above the outside air introduction hole 12. As shown in FIG. 1, the peeling suppressing portion 14 has a contour line that protrudes downward in a longitudinal sectional view passing through the central axis of the mouth portion 11. In addition, while the peeling suppression part 14 protrudes below, it can also be made into the shape which protrudes also to radial inside. In the present embodiment, the peeling suppression unit 14 has a substantially arc shape in outline in a longitudinal sectional view. The peeling suppressing portion 14 is provided on the inner surface of the first step portion 16 in the mouth portion 11. By providing the first step portion 16 whose inner diameter increases downward, the shape of the peeling suppressing portion 14 can be easily formed into a shape protruding downward. That is, by providing the first stepped portion 16, a space is formed below the first stepped portion 16 (and the second straight portion 17), so that the peeling suppressing portion 14 protruding downward can be easily formed. Can do.

  By providing such a peeling suppression part 14, a groove 19 is formed in the outer edge part of the peeling suppression part 14. The groove 19 is formed between the first straight portion 15 and the first stepped portion 16 and has an acute angle in the longitudinal sectional view of the mouth portion 11. In the present embodiment, the groove 19 is an annular groove extending over the entire circumference of the mouth portion 11. Since the inner layer body 10b is sandwiched from both inner and outer sides in the radial direction by the outer layer body 10a, particularly at the apex portion of the groove 19 (bottom portion of the groove 19), the inner layer body 10b is difficult to peel off from the outer layer body 10a. Become. In addition, by providing the peeling suppressing portion 14 that protrudes from the inner peripheral surface of the mouth portion 11, the contact area between the outer layer body 10a and the inner layer body 10b becomes larger than when the inner peripheral surface is flat, and the outer layer body 10a. The inner layer body 10b becomes more difficult to peel off.

  Thus, in the container main body 10 of this embodiment, the effect which suppresses peeling of the inner layer body 10b becomes high by providing the peeling suppression part 14. FIG. Here, in the inspection process after blow-molding the delamination container 1, air is blown into the internal space between the outer layer body 10a and the inner layer body 10b from the outer air introduction hole 12, and the inner layer body 10b is previously removed from the outer layer body 10a. There is a step of peeling, and conventionally, there is a possibility that peeling of the inner layer body 10b may reach the upper end opening portion 11d of the mouth portion 11. According to this embodiment, such peeling of the inner layer body 10b is performed. The enlargement can be prevented by the peeling suppressing unit 14. Therefore, unlike the prior art, it is not necessary to increase the height of the mouth portion 11 in order to ensure the contact area between the outer layer body 10a and the inner layer body 10b. As a result, the height of the mouth portion 11 can be kept low.

  In addition, it is preferable that the peeling suppression part 14 is provided in the same circumferential direction position as the external air introduction hole 12 at least. That is, since the inner layer body 10b is peeled from the outer layer body 10a in the region of the outside air introduction hole 12, the peeling of the inner layer body 10b is prevented from being opened at the upper end opening of the mouth portion 11 by arranging the peeling suppressing portion 14 at this circumferential position. It is possible to effectively suppress reaching 11d.

  Further, in the present embodiment, the peeling suppressing portion 14 is an annular protrusion extending over the entire circumference of the mouth portion 11. Thus, the effect which suppresses peeling of the inner layer body 10b can be exhibited uniformly over the perimeter of the opening | mouth part 11 by making the peeling suppression part 14 into a cyclic | annular protrusion.

  Moreover, it is preferable that the acute angle of the groove 19 in a longitudinal sectional view is as small as possible, and the peeling suppression effect can be enhanced by reducing the angle.

  The shape of the peeling suppressing portion 14 is not particularly limited as long as it protrudes downward. For example, the peeling suppressing portion 14 is provided only at a plurality of protrusions intermittently in the circumferential direction of the mouth portion 11 or at one place in the circumferential direction. It may be a protrusion. Further, in the peeling suppressing unit 14, the contour line in the longitudinal section view of the mouth portion 11 may not be a curved line such as an arc shape, but may be a polygonal shape such as a triangular shape or a quadrangular shape constituted by straight lines. .

  A first engaging portion 11 a for retaining the discharge cap 20 is integrally provided on the outer peripheral surface of the outer layer body 10 a constituting the mouth portion 11. The first engaging portion 11a may be annular or may have a shape intermittent in the circumferential direction. The first engaging portion 11 a is provided below the outside air introduction hole 12 in the axial direction (vertical direction in this example) along the central axis of the mouth portion 11.

  In addition, a first seal portion 11b which is an annular convex portion protruding radially outward is integrally provided above the first engagement portion 11a. The first seal portion 11b has a distance from the center axis of the mouth portion 11 to the radially outer end of the first seal portion 11b from the center axis of the mouth portion 11 to the radially outer end of the first engagement portion 11a. It is comprised so that it may become smaller than distance. That is, the first seal portion 11b has a smaller diameter than the first engagement portion 11a.

  Further, a neck ring 13 protruding outward in the radial direction is provided below the first seal portion 11b. The lower surface 13a of the neck ring 13 constitutes a stoppering support surface that is supported by a support when the discharge cap 20 is attached to the mouth portion 11 by stoppering. In the present embodiment, the lower surface 13 a of the neck ring 13 constitutes a conveyance support surface that is supported by a conveyance jig when the container body 10 is conveyed.

  The container body 10 includes a plurality of adhesive layers (adhesive bands) that extend in the vertical direction and partially bond the inner layer body 10b to the outer layer body 10a between the outer layer body 10a and the inner layer body 10b. It is also possible to adopt a configuration. In addition, the container body 10 may have a configuration in which barrier layers having a barrier property against oxygen or water vapor are stacked and a configuration in which the barrier property is enhanced by various coatings.

  The discharge cap 20 is formed of, for example, a synthetic resin material, and is attached to the mouth portion 11 of the container body 10 so as to surround the inner plug 30. The discharge cap 20 includes a top wall portion 21 located above the partition wall 31 of the inner plug 30, and a cylindrical side wall portion 22 that is connected to the top wall portion 21 and located radially outside the mouth portion 11. It is formed in a top tube shape. A second engagement portion 22 a is provided on the inner peripheral surface of the side wall portion 22, and the second engagement portion 22 a is undercut engaged with the first engagement portion 11 a provided on the outer peripheral surface of the mouth portion 11. As a result, the discharge cap 20 is fixedly held in the mouth portion 11 of the container body 10. In the present embodiment, the second engaging portion 22 a is provided near the lower end portion of the side wall portion 22. Although the 2nd engaging part 22a can be made into a cyclic | annular convex part or a recessed part, it is good also as a convex part or a recessed part of the shape intermittent in the circumferential direction.

  The top wall portion 21 is integrally provided with a discharge cylinder 21a protruding upward from the top wall portion 21, and the inside thereof is a discharge port 23 for contents. The top wall 21 is provided with an intake hole 24 for taking in outside air. An air flow path from the intake hole 24 toward the outside air introduction hole 12 is formed between the mouth part 11 and the side wall part 22. For example, the air flow path has a groove on at least one of the outer peripheral surface of the mouth portion 11 and the inner peripheral surface of the side wall portion 22, or a protrusion on at least one of them to form a gap therebetween. Or the like. A second seal portion 22b is formed on the inner peripheral surface of the side wall portion 22 so as to abut against the outer surface of the first seal portion 11b in an airtight manner over the entire periphery to seal the air flow path. In the present embodiment, the second seal portion 22b is formed by an annular protrusion that slightly protrudes from the inner peripheral surface of the side wall portion 22;

  The inner plug 30 is formed of, for example, a synthetic resin material and is attached to the inside of the discharge cap 20. The inner plug 30 includes a partition wall 31 that covers the opening of the mouth portion 11, a sealing cylinder portion 32 that protrudes from the lower surface of the partition wall 31 and contacts the inner peripheral surface of the mouth portion 11 (the inner peripheral surface of the inner layer body 10 b), And a support cylinder 33 extending upward from the outer peripheral edge of 31. The outer diameter of the sealing cylinder part 32 is preferably set slightly larger than the inner diameter of the mouth part 11, and according to this, the outer peripheral surface of the sealing cylinder part 32 is set to the inner peripheral surface of the mouth part 11. Air tightness can be enhanced by strong contact.

  The upper end of the support cylinder portion 33 abuts on the lower surface of the top wall portion 21 and is fitted to the inner surface of the side wall portion 22 at the outer peripheral portion, whereby the inner plug 30 is fixedly held inside the discharge cap 20.

  In the central portion of the partition wall 31, an outflow hole 31 a for contents penetrating the partition wall 31 is provided. The outflow hole 31 a can communicate with the discharge port 23 provided in the discharge cap 20. The contents stored in the storage space S can flow out toward the discharge port 23 through the outflow hole 31a. On the upper surface of the partition wall 31 of the inner plug 30, an annular groove 31 b that surrounds the outflow hole 31 a is provided on the radially inner side of the support cylinder portion 33. On the outer peripheral edge of the partition wall 31, a ventilation groove 31 c penetrating the partition wall 31 is formed, and in the support cylinder portion 33, a communication groove 33 a communicating with the ventilation groove 31 c is formed.

  The partition wall 31 is provided with a cylindrical wall 34 penetrating vertically, and a reduced diameter portion 34 a is formed in the lower portion of the cylindrical wall 34 so as to reduce the diameter downward. A movable valve element 35 that is movable in the axial direction of the cylindrical wall 34 is disposed inside the cylindrical wall 34. In the illustrated example, the moving valve body 35 has a spherical shape, but is not limited thereto, and various shapes can be employed.

  The valve body 40 is disposed between the top wall portion 21 of the discharge cap 20 and the partition wall 31 of the inner plug 30, and opens and closes an outflow hole 31 a provided in the partition wall 31. Specifically, the valve body 40 allows the contents to move from the storage space S to the discharge port 23 and prevents the contents and the outside air from flowing from the discharge port 23 to the storage space S. The valve body 40 is formed of, for example, low density polyethylene (soft polyethylene), and includes a cylindrical base 41 and a disc-shaped valve main body 43 integrally connected to the inside of the base 41 via an elastic piece 42. ing. The upper end portion of the base portion 41 is fitted in an annular groove 21b provided on the lower surface of the top wall portion 21, and the lower end portion is fitted in an annular groove 31b of the partition wall 31 of the inner plug 30. Thus, the valve body 40 is fixedly held between the discharge cap 20 and the inner plug 30. In the present embodiment, the valve body 40 is in the form of a so-called three-point valve that supports the valve body 43 with three elastic pieces 42, but a so-called one-point valve that supports the valve body 43 with one hinge. Other types of check valves can be used. Inside the base portion 41, a flow path of contents is formed from the outflow hole 31 a provided in the partition wall 31 to the discharge port 23 provided in the top wall portion 21. Further, on the outside of the base portion 41, an air flow path is formed from the intake hole 24 toward the communication groove 33a and the ventilation groove 31c.

  The lid 50 is formed in a cylindrical shape with the same diameter as that of the discharge cap 20 and can be rotatably connected to the side wall portion 22 of the discharge cap 20 by a hinge 51 so as to cover the discharge cylinder 21a. It has become. A cylindrical sealing wall 52 is integrally provided on the inner surface of the lid 50, and when the lid 50 is closed, the sealing wall 52 is fitted inside the discharge cylinder 21a and the discharge port 23 is formed. It is supposed to block. On the side of the lid 50 facing the hinge 51, a knob 53 is provided that serves as a finger grip when the lid 50 is opened.

  When discharging the contents from the discharge container 1, the inner layer body is formed by squeezing the trunk while tilting the container main body 10 so that the discharge cylinder 21 a faces downward with the lid 50 opened. 10b is pressed and the content can be pushed out toward the outflow hole 31a. Thereby, the valve main body 43 can be opened, the contents in the accommodation space S can flow out from the outflow hole 31a toward the discharge port 23, and can be discharged from the discharge port 23 toward the outside.

  On the other hand, when the body squeeze is released after the contents are discharged, the outflow hole 31a is closed by the valve main body 43, and air is discharged from the intake hole 24 by the negative pressure generated when the outer layer body 10a is restored to its original shape. (Outside air) is introduced. The air introduced from the intake hole 24 is communicated with the inner layer body 10b and the outer layer body through the communication groove 33a, the ventilation groove 31c, and the air flow path formed by the gap formed between the mouth portion 11 and the side wall portion 22. It flows into the internal space between 10a. In this manner, by introducing the outside air between the inner layer body 10b and the outer layer body 10a, the outer layer body 10a can be restored to the original shape while the inner layer body 10b is subjected to volume reduction deformation. For this reason, it can suppress that external air is introduce | transduced into the storage space S, can reduce the contact with the air of the content accommodated in the container main body 10, and can suppress the quality change and deterioration of the content. In addition, when the discharge container 1 is tilted to discharge the contents, the movable valve body 35 moves to the valve body 43 side, finishes the discharge of the contents, and moves the discharge container 1 from the tilted position to the original position. When returning to the upright posture, the moving valve body 35 moves to the reduced diameter portion 34a side. Accordingly, the contents in the discharge cylinder 21 a can be drawn into the cylindrical wall 34 side through the gap between the elastic piece 42 and the valve body 43. Such a so-called suck back function can prevent dripping from the discharge cylinder 21a.

  In addition, in the discharge container 1 of this embodiment, the 1st engaging part 11a larger diameter than the 1st seal | sticker part 11b is provided under the 1st seal | sticker part 11b of the opening | mouth part 11. As shown in FIG. Moreover, the 2nd engaging part 22a is provided in the inner peripheral surface of the discharge cap 20 corresponding to the lower end part of the side wall part 22, and the 2nd seal part 22b is provided above the 2nd engaging part 22a. With this configuration, the second engaging portion 22a of the discharge cap 20 can easily pass through the first seal portion 11b of the mouth portion 11 (it is difficult to be caught) during the stoppering, and the discharge cap smoothly. 20 can be plugged into the mouth 11.

  Further, in the discharge container 1 of the present embodiment, the configuration in which the discharge cap 20 is undercut engaged with the mouth portion 11 provides a higher tampering prevention effect than the screw-type discharge cap. be able to.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, the discharge cap 20 is a stopper type that is held by undercut engagement, but is not limited thereto, and may be a screw cap. The lid 50 is not limited to be integrally connected to the discharge cap 20 by the hinge 51, and may be configured to be formed separately from the discharge cap 20 and attached to the discharge cap 20 by screwing or undercutting. . Further, an outside air introduction valve for opening and closing the intake hole 24 may be provided. For example, an annular elastic piece protruding radially outward from the outer peripheral surface of the base portion 41 of the valve body 40 is provided, and the suction hole 24 is blocked by bringing the tip portion into contact with the valve seat on the lower surface of the top wall portion 21. It can be configured.

1 Discharge container 10 Container body (lamination peeling container)
10a outer layer body 10b inner layer body 11 mouth portion 11a first engagement portion 11b first seal portion 11c lower surface (conveyance support surface)
11d Upper end opening 12 Outside air introduction hole 13 Neck ring 13a Lower surface (plugging support surface)
14 Peeling suppression part 15 First straight part 16 First step part (step part)
17 Second straight part 18 Second step part 19 Groove 20 Discharge cap 21 Top wall part 21a Discharge cylinder 21b Annular groove 22 Side wall part 22a Second engagement part 22b Second seal part 23 Discharge port 24 Inlet hole 30 Medium plug 31 Bulkhead 31a Outflow hole 31b Annular groove 31c Ventilation groove 32 Sealed cylinder part 33 Support cylinder part 33a Communication groove 34 Cylindrical wall 34a Reduced diameter part 35 Moving valve element 40 Valve element 41 Base part 42 Elastic piece 43 Valve body 50 Lid body 51 Hinge 52 Sealing wall part 53 Knob part S Storage space

Claims (6)

An outer layer body having a cylindrical mouth portion in which an outside air introduction hole is formed and a body portion connected to the mouth portion, and an inner layer body capable of volumetric deformation deformably laminated inside the outer layer body,
A delamination peeling container characterized in that a delamination suppressing portion is provided on the inner peripheral surface of the mouth portion, which is located on the upper end opening side of the mouth portion from the outside air introduction hole and protrudes toward the body portion side. . The mouth portion includes a first straight portion in which a contour line in a longitudinal sectional view passing through the central axis of the mouth portion is a straight line substantially parallel to the central axis above the outside air introduction hole, and the first straight portion A second straight portion having a smaller diameter than the first straight portion, which is connected to the upper portion of the first straight portion via a stepped portion,
The laminated peeling container according to claim 1, wherein the peeling suppressing portion is provided in the stepped portion.   The laminated peeling container according to claim 1 or 2, wherein the peeling suppressing portion is provided at least at the same circumferential position as the outside air introduction hole.   The lamination peeling container as described in any one of Claims 1-3 whose said peeling suppression part is a cyclic | annular protrusion provided over the perimeter of the said opening part.   The said peeling suppression part is a laminated peeling container as described in any one of Claims 1-4 in which the outline in the longitudinal cross-sectional view which passes along the center axis | shaft of the said opening part is substantially circular arc shape.   The delamination according to any one of claims 1 to 5, wherein a groove portion having a sharp outline in a longitudinal sectional view passing through a central axis of the mouth portion is formed on an outer edge portion of the delamination suppressing portion. container.

Images