Delamination container

Abstract

To provide a delamination container even in a neck bent shape that can reduce the remaining amount of contents.SOLUTION: The present invention relates to a delamination container 1 that has an outer layer body 10, an inner layer body 20 which is laminated in a peelable state on an inner surface of the outer layer body 10 and can be freely reduced in capacity to deform, an outside air introduction port 30 which lies between the outer layer body 10 and the inner layer body 20, and an adhesion zone 40 which is provided between the outer layer body 10 and the inner layer body 20 while extending in an up / down direction and partially bonds the outer layer body 10 and the inner layer body 20. The delamination container 1 is characterized in that the outer layer body 10 is in a neck bend shape having a cylindrical mouth part 11, a bottom part 12 with a ground surface 12a, a trunk part 13 with a peripheral wall 13a connecting with the bottom part 12, and a neck part 14 connecting the mouth part 11 and the trunk part 13 so that a center axis O1 of the mouth part 11 is inclined to an axis O2 of the trunk part 13, and the adhesion zone 40 is provided at least on the side where the mouth part 11 is inclined to the center axis O1 of the mouth part 11 and the axis O2 of the trunk part 13.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a peelable laminate container having an inner layer peelably laminated on the inner surface of an outer layer. [Background technology]

[0002] Conventionally, a peelable laminate container has been known as a synthetic resin container for storing contents, which has an outer layer, an inner layer that is peelably laminated on the inner surface of the outer layer and can be freely reduced in volume, an outside air inlet port connected between the outer layer and the inner layer, and an adhesive band that extends in the vertical direction between the outer layer and the inner layer and partially bonds the outer layer and the inner layer together (see, for example, Patent Document 1).

[0003] With this type of peelable laminated container, outside air can be introduced between the outer layer and the inner layer through an outside air inlet, causing only the inner layer to shrink as the contents are ejected, allowing the contents to be ejected without introducing outside air into the inside of the inner layer.This makes it possible to store contents that are prone to deterioration when exposed to air, resulting in a loss of medicinal efficacy, while suppressing such deterioration. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2023-51303 A Summary of the Invention [Problem to be solved by the invention]

[0005] As a container used for applying contents to the skin, etc., there is often used a container body with a curved neck shape having a cylindrical mouth, a body with a bottom wall with a ground surface and a peripheral wall connected to the bottom wall, and a neck connecting the mouth and the body so that the central axis of the mouth is inclined with respect to the axis of the body, and an application stopper is attached to the container body. Containers of this shape are often used for storing contents whose efficacy decreases when they come into contact with air, such as liquid medicinal patches, and there is a demand for the use of a peelable laminate container as described above as the container body.

[0006] However, in a coating container that uses a laminated peelable container with a bent neck as the container body, the contents are coated with the neck bent downwards. Therefore, if the part of the inner layer on the side of the neck bent direction shrinks as the contents are dispensed, the contents are less likely to flow toward the mouth, resulting in a large amount of contents remaining.

[0007] The present invention has been made in consideration of such problems, and an object of the present invention is to provide a peelable laminated container that is capable of reducing the amount of remaining content even when it has a bent neck shape. [Means for solving the problem]

[0008] The peelable laminated container of the present invention is a peelable laminated container having an outer layer, an inner layer which is peelably laminated on the inner surface of the outer layer and can be freely reduced in volume, an outside air inlet port connected between the outer layer and the inner layer, and an adhesive band extending in the vertical direction between the outer layer and the inner layer and partially bonding the outer layer and the inner layer, wherein the outer layer has a curved neck shape having a cylindrical mouth, a bottom with a contact surface, a body with a peripheral wall connected to the bottom, and a neck which connects the mouth and the body so that the central axis of the mouth is inclined relative to the axis of the body, and the adhesive band is provided at least on the side where the mouth is inclined relative to the central axis of the mouth and the axis of the body.

[0009] In the delamination container of the present invention having the above-mentioned configuration, it is preferable that the adhesive band is provided only on the side where the mouth is inclined with respect to the central axis of the mouth and the axis of the body.

[0010] In the laminated peelable container of the present invention, in the above-mentioned configuration, it is preferable that a predetermined range of the peripheral wall extending downward from the neck on the side where the adhesive band is provided extends linearly downward parallel to the axis of the body.

[0011] In the above-mentioned configuration, the delaminated laminated container of the present invention preferably has an applicator stopper attached to the mouth portion, the applicator stopper having an inner plug body having an outflow hole and fixed to the mouth portion, a check valve provided at the outflow hole, an elastically deformable operating member attached to the outside of the inner plug body, a discharge cap having a discharge port and attached to the outside of the operating member, a protrusion provided on the operating member and protruding outward from the discharge port, an opening / closing valve provided on the operating member and opening when the protrusion is pressed into the discharge port, and an applicator member attached to the outside of the discharge cap and impregnated with the contents. Effect of the Invention

[0012] According to the present invention, it is possible to provide a delaminating container that is capable of reducing the amount of remaining content even if it has a bent neck shape. [Brief description of the drawings]

[0013] [Figure 1] 1 is a side view of a delaminating container according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a front view of the delaminating container shown in FIG. [Diagram 3] FIG. 2 is a bottom view of the delaminating container shown in FIG. [Figure 4] 2 is an enlarged cross-sectional view of a portion of range A of the delaminated container shown in FIG. [Diagram 5] 2 is a partially cutaway side view showing an enlarged view of the mouth portion of the delaminating container shown in FIG. 1 to which an application plug and a cap are attached. [Figure 6]FIG. 13 is a front view of a delaminating container according to a modified example. [Figure 7] FIG. 11 is a side view of a delaminating container according to another modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, a delaminating container 1 according to one embodiment of the present invention will be described in detail with reference to the drawings.

[0015] In this specification and claims, "upper" means the upper side when the delaminating container 1 is placed in the upright position shown in FIG. 1, and "lower" means the opposite side.

[0016] The peelable laminated container 1 shown in Figures 1, 2, and 3 is a container made of synthetic resin used to store liquid contents, such as liquid patches, that are susceptible to deterioration due to exposure to air and loss of medicinal efficacy.

[0017] The peelable laminate container 1 has a double structure having an outer layer 10 and an inner layer 20 which is peelably laminated on the inside of the outer layer 10 and is capable of being reduced in volume and deformed.

[0018] The peelable laminate container 1 can be formed, for example, by co-extruding the synthetic resin material forming the outer layer 10 and the synthetic resin material forming the inner layer 20 in a molten state to form a cylindrical laminated parison, and then sandwiching the laminated parison between a mold and blow molding it (extrusion blow molding).

[0019] The synthetic resin material for forming the outer layer 10 may be, for example, a material mainly made of polyethylene (PE) or polypropylene (PP). The synthetic resin material for forming the inner layer 20 may be, for example, a material mainly made of ethylene-vinyl alcohol copolymer resin (EVOH). Note that the materials for the outer layer 10 and the inner layer 20 are not limited to those mentioned above, and each may have a single layer or a laminate structure.

[0020] The outer layer 10 is a part that constitutes the outer shell of the delaminating container 1, and has a bent neck shape having a cylindrical mouth 11, a bottom 12 with a contact surface 12a, a body 13 with a peripheral wall 13a continuing to the bottom 12, and a neck 14 that connects the mouth 11 and the body 13 such that the central axis O1 of the mouth 11 is inclined relative to the axis O2 of the body 13. That is, the outer layer 10 has a bent neck 14 so that the mouth 11 opens obliquely upward.

[0021] The mouth portion 11 has an external thread 11a integrally formed on its outer circumferential surface, and its central axis O1 is inclined at an angle of 90 degrees or less with respect to the axis O2.

[0022] The contact surface 12a of the bottom 12 is an annular surface perpendicular to the up-down direction. The delaminating container 1 can be placed upright on the contact surface 12a. The contact surface 12a may be divided into a plurality of parts in the circumferential direction as long as it is formed in the same plane. The inner part of the contact surface 12a of the bottom 12 is a recess 12b recessed toward the upper side, and a linear protruding rib 12c is provided in the recess 12b. The protruding rib 12c is a cut-off portion formed by cutting off the laminated parison with a die when the delaminating container 1 is formed by extrusion blow molding, and protrudes downward from the lower surface of the recess 12b.

[0023] The convex rib 12c of the bottom 12 is provided with a slit-shaped outside air inlet 30 by peeling off the cut-off portions of the outer layer 10. The outside air inlet 30 is connected between the outer layer 10 and the inner layer 20, and outside air can be introduced between the outer layer 10 and the inner layer 20 as the contents are discharged.

[0024] The axis O2 of the body 13 is perpendicular to the ground surface 12a, and the peripheral wall 13a surrounds the axis O2. The upper portion 13a1 of the peripheral wall 13a, which is a predetermined range extending downward from the neck 14 on the side where the adhesive band 40 is provided, i.e., the side where the mouth 11 is inclined, has a shape that extends linearly downward parallel to the axis O2 of the body 13 in a side view. The cross-sectional shape of the upper portion 13a1 perpendicular to the axis O2 is an ellipse whose minor axis direction is the direction connecting the axis O2 and the adhesive band 40. The lower side of the upper portion 13a1 of the linear shape in a side view of the peripheral wall 13a is a curved portion 13a2 that gradually curves so as to protrude radially outward, and the portion between the lower end of the curved portion 13a2 and the bottom 12 is a straight portion 13a3 that extends linearly downward parallel to the axis O2.

[0025] The inner layer body 20 is in the shape of a flexible bag, and is laminated over the entire inner surface of the outer layer body 10. The inner layer body 20 is open at the mouth portion 11, and its inside forms a storage space S for storing contents.

[0026] An adhesive strip 40 is provided between the outer layer body 10 and the inner layer body 20. The adhesive strip 40 is in the form of a strip that is sufficiently narrow compared to the entire circumference of the mouth portion 11 to the body portion 13, and is provided to extend in the vertical direction between the upper end of the mouth portion 11 and the center of the bottom portion 12. As shown in FIG. 4, the adhesive strip 40 is disposed between the outer layer body 10 and the inner layer body 20 and laminated thereon, and partially bonds the outer layer body 10 and the inner layer body 20, i.e., in a portion of the circumference of the mouth portion 11 to the body portion 13. Therefore, the inner layer body 20 can be peeled off from the outer layer body 10 in the portion where the adhesive strip 40 is not provided, but is bonded to the outer layer body 10 via the adhesive strip 40 in the portion where the adhesive strip 40 is provided, so that it cannot be peeled off from the outer layer body 10.

[0027] Here, in the delaminating container 1 of this embodiment, the adhesive band 40 is provided at least on the side (right side in FIG. 1) where the mouth portion 11 is inclined with respect to the central axis O1 of the mouth portion 11 and the axis O2 of the body portion 13. In this embodiment, one adhesive band 40 is provided between the outer layer 10 and the inner layer 20 on the side where the mouth portion 11 is inclined with respect to the central axis O1 of the mouth portion 11 and the axis O2 of the body portion 13 in the side view shown in FIG. 1, and extends in the vertical direction so that its widthwise center coincides with both the central axis O1 of the mouth portion 11 and the axis O2 of the body portion 13 in the front view shown in FIG. 2.

[0028] The adhesive strip 40 can be formed by arranging a synthetic resin material having adhesive properties that constitutes the adhesive strip 40 in a strip shape between the synthetic resin material that forms the outer layer 10 of the laminated parison and the synthetic resin material that forms the inner layer 20 when forming the peelable laminated container 1 by extrusion blow molding.

[0029] In this embodiment, the adhesive band 40 is provided along the parting line of the mold formed on the surface of the outer layer 10 during blow molding, and at the bottom 12, the adhesive band 40 extends along the convex rib 12c.

[0030] The delaminating container 1 having the above-mentioned structure can be used as, for example, an application container 60 having an application plug 50 attached to the mouth portion 11 as shown in FIG.

[0031] The applicator plug 50 has an inside plug body 51 fixed to the mouth 11, and a check valve 52 is provided in an outlet hole 51a provided in the inside plug body 51. The check valve 52 is a so-called three-point valve, and operates to allow the contents to flow out from the inside of the storage space S of the inner layer body 20 to the outside of the storage space S through the outlet hole 51a, and to prevent the contents or air from flowing in from the outside of the storage space S to the inside of the storage space S through the outlet hole 51a. A dome-shaped operating member 53 that is elastically deformable is attached to the outside of the inside plug body 51, and a discharge cap 54 is attached to the outside of the operating member 53. The operating member 53 has a protrusion 53a that protrudes outward from a discharge port 54a provided in the discharge cap 54, and has a pair of slits 53b as opening and closing valves on both sides (only one side is shown in FIG. 5) of the dome-shaped protrusion 53a. In addition, an applicator 55 is attached to the outside of the discharge cap 54. The applicator 55 is made of a material such as a sponge and is formed in a dish shape to cover the discharge cap 54, and is capable of soaking in the contents discharged from the discharge port 54a and applying it to an object to be coated.

[0032] An overcap 56 is removably attached to the mouth portion 11 so as to cover the applicator plug 50 by being screwed onto the male thread 11a when not in use.

[0033] In the application container 60 having the above configuration, the overcap 56 is removed from the mouth 11, the delaminated container 1 is tilted so that the mouth 11 or the application plug 50 faces downward, and the protrusion 53a is pressed against the application target and pushed into the discharge port 54a, so that the contents between the actuating member 53 and the inner plug body 51 can be discharged from the slit 53b through the discharge port 54a to the outside and applied to the application target. When the protrusion 53a is released from the application target, the actuating member 53 returns to its original shape, and the check valve 52 opens due to the negative pressure generated between the actuating member 53 and the inner plug body 51, and the next contents are filled between the actuating member 53 and the inner plug body 51. In this way, by repeatedly pressing the protrusion 53a against the application target and releasing it, the contents can be discharged from the discharge port 54a toward the application target without squeezing the body 13.

[0034] Here, in the delaminated container 1 according to this embodiment, as described above, the adhesive band 40 is provided at least on the side where the mouth portion 11 is inclined with respect to the central axis O1 of the mouth portion 11 and the axis O2 of the body portion 13. As a result, even if the inner layer body 20 is reduced in volume and deformed with the discharge of the contents from the inside to the outside of the storage space S, the part of the inner layer body 20 on the side where the mouth portion 11 is inclined is maintained in a state adhered to the outer layer body 10 by the adhesive band 40 and will not peel off from the outer layer body 10, and the part of the inner layer body 20 other than the part on the side where the mouth portion 11 is inclined will peel off from the outer layer body 10.

[0035] Therefore, when the peelable laminated container 1 is tilted so that the mouth 11 or the application plug 50 faces downward in order to discharge the contents toward the object to be coated, the portion of the inner layer 20 that is adhered to the outer layer 10 by the adhesive band 40 and does not peel off from the outer layer 10 is located on the lower side, and this portion ensures a flow path for the contents from the storage space S toward the mouth 11. Therefore, the contents stored in the storage space S of the inner layer 20 can easily flow along the portion of the inner layer 20 that is adhered to the outer layer 10 by the adhesive band 40 and does not peel off from the outer layer 10 to the mouth 11 side, i.e., the application plug 50 side.

[0036] In this way, according to the laminated peelable container 1 of this embodiment, the adhesive band 40 is provided at least on the side where the mouth portion 11 is inclined relative to the central axis O1 of the mouth portion 11 and the axis O2 of the body portion 13. Therefore, even if the outer layer 10 has a bent neck shape, when the contents are discharged in a state in which the inner layer 20 has been deformed in volume as the contents are discharged, the contents are prevented from flowing easily toward the mouth portion 11, and the amount of remaining contents can be reduced.

[0037] Furthermore, in the delaminated laminate container 1 according to this embodiment, the adhesive band 40 is provided only on the side where the mouth 11 is inclined with respect to the central axis O1 of the mouth 11 and the axis O2 of the body 13, so that the inner layer body 20 shrinks and deforms toward the side where the mouth 11 is inclined, and a flow path for the contents from the storage space S toward the mouth 11 can be more reliably secured. This makes it possible to more effectively prevent the contents from flowing toward the mouth 11 when the contents are discharged in a state where the inner layer body 20 has been volume-reduced and deformed as the contents are discharged, and to more effectively reduce the remaining amount of the contents.

[0038] In the delaminating container 1 according to the present embodiment, the upper portion 13a1 of the peripheral wall 13a of the body 13, which is a predetermined range extending downward from the neck 14 on the side where the adhesive band 40 is provided, is shaped to extend linearly downward parallel to the axis O2 of the body 13, so that when the contents are discharged in a state where the inner layer body 20 is deformed in volume reduction with the discharge of the contents, the contents can flow more easily from the storage space S toward the mouth 11. That is, if the upper portion 13a1 of the peripheral wall 13a of the body 13, which is a predetermined range extending downward from the neck 14 on the side where the adhesive band 40 is provided, is shaped to extend downward from the lower end of the mouth 11 or the neck 14 at an inclination outward in the radial direction, when the contents are discharged, the contents must overcome the inclined extending portion, and it becomes difficult for them to flow from the storage space S to the mouth 11. In contrast, in the delaminating container 1 according to this embodiment, the upper portion 13a1 of the peripheral wall 13a of the body 13, which is a predetermined range extending downward from the neck 14 on the side where the adhesive band 40 is provided, is shaped to extend linearly downward parallel to the axis O2 of the body 13, so that the contents can easily flow straight along the linearly extending upper portion 13a1 of the body 13 from the storage space S toward the mouth 11. This more effectively prevents the contents from flowing from the storage space S toward the mouth 11, and more effectively reduces the remaining amount of contents.

[0039] The present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit and scope of the present invention.

[0040] For example, in the above embodiment, the delaminated container 1 is formed by extrusion blow molding, but this is not limited thereto, and the container may be formed by other manufacturing methods, such as by biaxially stretching blow molding a preform that has been formed in advance into an approximately test tube shape having a laminated structure.

[0041] In addition, in the above embodiment, the outside air inlet 30 is a slit-like inlet provided in the bottom 12, but this is not limited to this, and as long as outside air can be introduced between the outer layer 10 and the inner layer 20, the position, shape, number, etc. are not particularly limited, and it is possible to provide it in, for example, the mouth portion 11 or the body portion 13.

[0042] Furthermore, in the above embodiment, since the applicator plug 50 is configured to be able to dispense the contents without squeezing the body 13, a check valve is not provided in the outside air inlet 30, but a check valve may be provided in the outside air inlet 30. With this configuration, the contents can be easily dispensed by squeezing the body 13.

[0043] Further, in the above embodiment, only one adhesive strip 40 is provided on the side where the mouth portion 11 is inclined relative to the central axis O1 of the mouth portion 11 and the axis O2 of the body portion 13, but the number of adhesive strips 40 can be changed in various ways as long as the adhesive strip 40 is provided at least on the side where the mouth portion 11 is inclined relative to the central axis O1 of the mouth portion 11 and the axis O2 of the body portion 13. For example, as shown in Fig. 6, two adhesive strips 40 are provided on the side where the mouth portion 11 is inclined relative to the central axis O1 of the mouth portion 11 and the axis O2 of the body portion 13, sandwiching the central axis O1 and the axis O2 between them in a front view. In this case, it is preferable that the interval between adjacent adhesive strips 40 is set to such an extent that the portion of the inner layer body 20 between the adjacent adhesive strips 40 does not peel off from the outer layer body 10.

[0044] Furthermore, in the above embodiment, only one adhesive band 40 is provided on the side where the mouth 11 is inclined relative to the central axis O1 of the mouth 11 and the axis O2 of the body 13, but as shown in FIG. 7, in addition to the side where the mouth 11 is inclined relative to the central axis O1 of the mouth 11 and the axis O2 of the body 13, an adhesive band 40 may also be provided on the side opposite to the side where the mouth 11 is inclined relative to the central axis O1 of the mouth 11 and the axis O2 of the body 13. In this configuration, the same effect as above can be obtained, and the volume reduction deformation of the inner layer body 20 or the peeling from the outer layer body 10 due to the discharge of the contents can be controlled more accurately, so that the remaining amount of the contents can be more effectively reduced. Furthermore, in this configuration, multiple adhesive bands 40 may also be provided on each of the side where the mouth 11 is inclined relative to the central axis O1 of the mouth 11 and the axis O2 of the body 13 and the side opposite to the side where the mouth 11 is inclined.

[0045] Furthermore, in the above embodiment, the application plug 50 having the configuration shown in Fig. 5 is attached to the mouth 11 of the delaminating container 1 to be used as the application container 60, but the configuration of the application plug 50 is not limited to that shown in Fig. 5 and can be changed in various ways. Also, instead of the application plug 50, a plug or cap having a different configuration may be attached to the mouth 11 of the delaminating container 1. [Explanation of symbols]

[0046] 1. Delaminated container 10 Outer body 11 Mouth 11a Male thread 12 Bottom 12a Ground plane 12b Recess 12c Convex rib 13 Torso 13a Peripheral wall 13a1 Upper part 13a2 Curved section 13a3 Straight section 14 Neck 20 Inner layer 30 Outside air intake 40 Adhesive Strip 50 Application plug 51 Inner plug body 51a Outflow hole 52 Check valve 53 Operating member 53a Protrusion 53b Slit 54 Discharge cap 54a Discharge port 55 Coating material 56 Overcap 60 Application container O1 center axis O2 axis S Storage space

Claims

1. A peelable laminated container having an outer layer, an inner layer which is peelably laminated on the inner surface of the outer layer and can be freely reduced in volume, an outside air inlet port connected between the outer layer and the inner layer, and an adhesive band extending in the vertical direction between the outer layer and the inner layer and partially bonding the outer layer and the inner layer, The outer layer body has a bent neck shape including a cylindrical mouth portion, a bottom portion having a grounding surface, a body portion having a peripheral wall connected to the bottom portion, and a neck portion connecting the mouth portion and the body portion such that the central axis of the mouth portion is inclined with respect to the axis of the body portion, A peelable laminate container, characterized in that the adhesive band is provided at least on a side where the mouth portion is inclined with respect to a central axis of the mouth portion and an axis of the body portion.

2. 2. The delamination container according to claim 1, wherein the adhesive band is provided only on a side of the mouth portion that is inclined with respect to a central axis of the mouth portion and an axis of the body portion.

3. 3. The peelable laminate container according to claim 1, wherein a portion of the peripheral wall extending downward from the neck on the side where the adhesive band is provided extends linearly downward parallel to the axis of the body.

4. An inner plug body having an outlet hole and fixed to the mouth portion; A check valve provided in the outflow hole; an elastically deformable operating member attached to the outside of the inside plug body; a discharge cap having a discharge port and attached to the outside of the actuating member; a protrusion provided on the actuating member and protruding outward from the discharge port; an on-off valve provided on the actuating member, the on-off valve opening when the protrusion is pressed into the discharge port; 2. The delaminating container according to claim 1, further comprising an applicator plug attached to the mouth portion and having an applicator member that is attached to the outside of the discharge cap and that is impregnated with the contents.

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