Delaminated container

Abstract

To provide a delamination container capable of preventing sticking of an inner layer body to an outer layer body in a shoulder while securing transverse stiffness.SOLUTION: A delamination container 1 has a bottle shape including a mouth 4, a shoulder 5, a trunk 6 and a bottom 7, and comprises an outer layer body 2, an inner layer body 3, and an outside air introduction port 9. The delamination container 1 is such that: a plurality of vertical ribs 20 recessed in a radial direction inside and extending downward from an upper end of the shoulder 5 are aligned and disposed in the shoulder 5 at intervals in a circumferential direction; a position of a lower end each of the vertical ribs 20 is above a lower end of the shoulder 5; and a plurality of recesses 23 having a vertical direction size smaller than that of the vertical rib 20 are disposed in the shoulder 5 below the vertical rib 20 and deviating in a circumferential direction relative to the vertical rib 20.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a delaminating container. [Background technology]

[0002] Background Art A known type of peelable laminated container is a container for storing contents such as food seasonings such as soy sauce or foods such as beverages, cosmetics such as lotion, and toiletries such as shampoo, conditioner or liquid soap. The bottle-shaped container has a mouth, shoulder, body, and bottom, and is equipped with an outer layer, an inner layer that is peelably laminated on the inside surface of the outer layer and can be reduced in volume and deformed, and an outside air inlet port provided at the mouth and connected between the outer layer and the inner layer.

[0003] After discharging the contents to the outside, the peelable laminate container can introduce outside air between the outer layer and the inner layer from the outside air inlet to reduce the volume of the inner layer in accordance with the discharge of the contents. This allows the contents to be discharged without being replaced by outside air, suppressing contact of the contents stored in the inner layer with outside air and suppressing deterioration or alteration of the contents.

[0004] Conventionally, a peelable laminated container of this type has been known in which the shoulder is provided with multiple vertical ribs that are recessed radially inward and extend downward from the upper end of the shoulder in order to prevent the inner layer from sticking to the outer layer at the shoulder, thereby preventing an airway from being secured from the outside air inlet to the body (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2021-41989 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the above-mentioned conventional laminated peelable container, the lower end of the vertical rib is positioned above the lower end (maximum diameter part) of the shoulder, which creates the problem that the inner layer may stick to the outer layer in the area between the lower end of the vertical rib and the lower end of the shoulder, making it difficult to create an airway.

[0007] On the other hand, if the vertical rib is extended to the lowest end of the shoulder, the lateral rigidity of the container will decrease, which may cause problems such as the container being crushed on the conveying line or reduced restoration ability of the body after squeezing.

[0008] The present invention has been made in consideration of such problems, and its object is to provide a peelable laminated container that can prevent the inner layer from sticking to the outer layer at the shoulder while maintaining lateral rigidity. [Means for solving the problem]

[0009] The laminated peelable container of the present invention is a bottle-shaped container having a mouth, a shoulder, a body and a bottom, and comprising 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, and an outside air inlet port provided at the mouth and connected between the outer layer and the inner layer, characterized in that the shoulder is provided with a plurality of vertical ribs which are recessed radially inward and extend downward from the upper end of the shoulder, the lower end of each of the vertical ribs being positioned above the lower end of the shoulder, and a plurality of recesses each having a vertical dimension smaller than the vertical ribs are provided in the shoulder below the vertical ribs and offset circumferentially from the vertical ribs.

[0010] In the delamination container of the present invention having the above-mentioned configuration, it is preferable that the recess has a circular shape whose vertical dimension and circumferential dimension are the same.

[0011] In the delamination container of the present invention having the above-mentioned configuration, it is preferable that the recess has a vertically elongated shape whose up-down dimension is greater than its circumferential dimension.

[0012] In the above-mentioned configuration of the laminated peelable container of the present invention, it is preferable that a plurality of sub-vertical ribs are provided between a pair of adjacent vertical ribs of the shoulder portion, each extending from below the upper end of the vertical rib to the same vertical position as the lower end of the vertical rib, and the recess is provided below the circumferential center position of adjacent ones of the plurality of sub-vertical ribs.

[0013] In the above-mentioned configuration of the laminated peelable container of the present invention, it is preferable that a sub-vertical rib is provided between a pair of adjacent vertical ribs of the shoulder portion, each extending from below the upper ends of the vertical ribs to the same vertical position as the lower ends of the vertical ribs, and the recess is provided below the circumferential center position of the vertical rib and the sub-vertical rib.

[0014] In the delaminating container of the present invention having the above-mentioned configuration, it is preferable that the body portion has a squeeze region that is continuous with the shoulder portion via a circumferential step portion or a circumferential rib portion.

[0015] In the delaminating container of the present invention having the above-mentioned configuration, the outer layer and the inner layer are preferably made of polyethylene terephthalate. Effect of the Invention

[0016] According to the present invention, it is possible to provide a delaminating container that can prevent the inner layer from sticking to the outer layer at the shoulder while ensuring lateral rigidity. [Brief description of the drawings]

[0017] [Figure 1] 1 is a front view of a delaminating container according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an enlarged view of a main part of the delaminating container shown in FIG. [Diagram 3] FIG. 2 is a plan view of the delaminating container shown in FIG. [Figure 4] 13 is an enlarged view of a main part of a delaminating container according to a modified example. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, a delaminating container 1 according to an embodiment of the present invention will be described in detail with reference to the drawings.

[0019] In this specification and the claims, the up-down direction means the up-down direction (the direction in which the axis O extends) when the laminated peelable container 1 is in an upright position as shown in Figure 1, the radial direction means the direction passing through the axis O of the laminated peelable container 1 and perpendicular to the axis O, and the circumferential direction means the circumferential direction centered on the axis O.

[0020] The peelable laminated container 1 shown in Figures 1, 2, and 3 is a squeeze-type container that can be used to store a variety of contents, such as food seasonings such as soy sauce or foods such as beverages, cosmetics such as lotion, and toiletries such as shampoo, conditioner, or liquid soap, and has a double structure having an outer layer 2 and an inner layer 3.

[0021] The outer layer 2 constitutes the outer shell of the delaminating container 1 and is made of polyethylene terephthalate (PET). The outer layer 2 is not limited to a single-layer structure, and may have a multi-layer structure to improve barrier properties, etc., as long as it is made mainly of polyethylene terephthalate.

[0022] The inner layer body 3 is also made of polyethylene terephthalate (PET). The inner layer body 3 is formed in a bag shape thinner than the outer layer body 2, and is laminated on the inner surface of the outer layer body 2 in a peelable manner. The peeling of the inner layer body 3 from the inner surface of the outer layer body 2 may be peeling from an adhesive state, peeling from a pseudo-adhesive state in the case of an incompatible resin laminate, or separation from a tightly adhered state. In order to improve the peelability, a peeling layer such as silicone may be provided on at least one of the inner surface of the outer layer body 2 and the outer surface of the inner layer body 3. The inside of the inner layer body 3 is a storage space S, and contents can be stored in the storage space S. The inner layer body 3 is freely deformable so as to reduce its internal volume while peeling from the inner surface of the outer layer body 2 as the contents are poured out from the storage space S to the outside. The inner layer body 3 is not limited to a single-layer structure, and can have a multi-layer structure to improve barrier properties, etc., as long as it is mainly made of polyethylene terephthalate.

[0023] As described above, in this embodiment, both the outer layer 2 and the inner layer 3 of the delaminated container 1 are made of polyethylene terephthalate. Examples of such polyethylene terephthalate include homo-PET, but other PET such as IPA (isophthalic acid) modified PET or CHDM modified PET can also be used. The polyethylene terephthalate constituting the outer layer 2 and the polyethylene terephthalate constituting the inner layer 3 can be of the same or different composition.

[0024] By using polyethylene terephthalate for the outer layer 2 and the inner layer 3, the delaminated container 1 can be made lightweight, strong, and highly transparent.

[0025] The outer layer 2 and the inner layer 3 are not limited to being made of polyethylene terephthalate, but may be made of other synthetic resin materials, such as polypropylene (PP) or polyethylene (PE).

[0026] The delaminating container 1 is a blow molded product, and has a bottle shape with a mouth 4, a shoulder 5, a body 6, and a bottom 7. The mouth 4 is a non-stretched part that is not stretched in the blow molding, and the shoulder 5, the body 6, and the bottom 7 are each a stretched part that is stretched in the blow molding.

[0027] The delaminating container 1, which is a blow molded product, can be formed by biaxially stretching and blow molding a double-structure preform that combines an outer body formed by injection molding polyethylene terephthalate with an inner body formed by injection molding polyethylene terephthalate separately from the outer body. In this case, the outer body corresponds to the outer layer body 2, and the inner body corresponds to the inner layer body 3.

[0028] In addition, the peelable laminated container 1 can also be formed by biaxially stretching blow molding a laminated preform having a structure in which a synthetic resin material corresponding to the outer layer 2 and a synthetic resin material corresponding to the inner layer 3 are laminated together.

[0029] In addition, the peelable laminated container 1 can also be formed by extrusion blow molding (EBM), in which a cylindrical laminated parison made of a synthetic resin material corresponding to the outer layer 2 and a synthetic resin material corresponding to the inner layer 3 is blow molded using a split mold.

[0030] The mouth portion 4 is generally cylindrical and centered on the axis O, and has an external thread 4a formed integrally with the outer circumferential surface thereof for mounting a member such as a pouring cap. In addition, a neck ring 8 is formed integrally with the mouth portion 4 below the external thread 4a.

[0031] The mouth part 4 may have a protrusion on its outer circumferential surface, instead of the male thread 4a, for undercut engagement with a member such as a pouring cap by tapping. The mouth part 4 may also be configured without the neck ring 8.

[0032] An outside air inlet 9 is provided in the mouth 4. In this embodiment, two outside air inlets 9 are provided as through holes that penetrate the outer layer 2 in the radial direction, on either side of the axis O of the portion constituting the mouth 4 of the outer layer 2. The outside air inlet 9 is connected between the outer layer 2 and the inner layer 3, and can introduce outside air between the outer layer 2 and the inner layer 3 as the inner layer 3 peels off from the outer layer 2.

[0033] The shoulder portion 5 is gradually enlarged in diameter from the upper end downward, and the upper end is integrally connected to the lower end of the mouth portion 4. In this embodiment, the shoulder portion 5 is dome-shaped, with a maximum diameter at the lower end and a convex shape extending radially outward (outside the container). The cross-sectional shape of the shoulder portion 5 perpendicular to the axis O is substantially circular.

[0034] The body portion 6 has a generally cylindrical shape, and its upper end is integrally connected to the lower end of the shoulder portion 5. In this embodiment, the body portion 6 has a cylindrical squeeze region 6a and a reinforcing region 6b that is integrally connected to the lower end of the squeeze region 6a.

[0035] The squeeze area 6a is provided in a predetermined range on the shoulder 5 side in the up-down direction of the body 6, and has a circular cross-sectional shape perpendicular to the axis O. The delaminating container 1 can push (press) the squeeze area 6a radially inward (toward the container interior) to push out the contents stored in the storage space S from the mouth 4 to the outside and discharge it.

[0036] In this embodiment, the outer diameter of the upper end of the squeeze region 6a is smaller than the outer diameter of the lower end of the shoulder portion 5, and a circumferential step portion 11 is formed between the upper end of the squeeze region 6a and the lower end of the shoulder portion 5, the step portion 11 being circumferentially spaced about the axis O. That is, the upper end of the squeeze region 6a is continuous with the lower end of the shoulder portion 5 via the circumferential step portion 11.

[0037] The step portion 11 is gradually reduced in diameter from the shoulder portion 5 side toward the squeeze region 6a side and has a curved shape that is convex toward the radially outward direction. This increases the rigidity of the step portion 11 and suppresses the step portion 11 from deforming together with the squeeze region 6a when the squeeze region 6a is squeezed, thereby improving the discharge operability of the squeeze region 6a.

[0038] The step portion 11 may be configured to have a plurality of (12 in the illustrated example) depressions 12, each recessed radially inward, arranged at equal intervals in the circumferential direction. By providing the depressions 12 in the step portion 11, when the contents are discharged and the inner layer body 3 undergoes volumetric deformation relative to the outer layer body 2, the inner layer body 3 is crushed starting from the depressions 12, and the inner layer body 3 can be easily peeled off from the outer layer body 2 at the step portion 11.

[0039] Alternatively, the outer diameter of the upper end of the squeeze region 6a and the outer diameter of the lower end of the shoulder portion 5 may be made the same, and a circumferential rib portion may be provided between the upper end of the squeeze region 6a and the lower end of the shoulder portion 5 instead of the circumferential step portion 11, so that the upper end of the squeeze region 6a is connected to the lower end of the shoulder portion 5 via the circumferential rib portion. In this case, the rib portion is preferably formed in a groove shape recessed radially inward, but may be in a shape protruding radially outward.

[0040] The reinforcement region 6b is generally cylindrical and has a larger diameter than the squeeze region 6a, and has two annular ribs 6c extending in the circumferential direction and having a recessed groove shape on its outer circumferential surface. The reinforcement region 6b has higher radial rigidity than the squeeze region 6a due to the provision of the two annular ribs 6c.

[0041] The bottom portion 7 is integrally connected to the lower end of the reinforced region 6b of the body portion 6, and closes the lower end of the body portion 6.

[0042] The shoulder portion 5 is provided with a number of vertical ribs 20 each recessed radially inward (toward the interior of the container) and extending downward from the upper end of the shoulder portion 5. In this embodiment, as shown in Fig. 3, twelve vertical ribs 20 each extending straight in the vertical direction are provided in a line at equal intervals in the circumferential direction. Each vertical rib 20 is a so-called concave rib, with both the outer layer 2 and the inner layer 3 recessed radially inward, and has the same vertical length and groove width. The positions of the lower ends of the vertical ribs 20 are aligned with each other and are higher than the lower end of the shoulder portion 5.

[0043] By providing multiple vertical ribs 20 on the shoulder portion 5, an air passage for outside air can be easily formed between the outer layer 2 and the inner layer 3 from the outside air inlet 9 provided in the mouth portion 4 toward the body portion 6, making it easier to peel the inner layer 3 from the outer layer 2.

[0044] When multiple recesses 12 are provided in the step portion 11, it is preferable to provide these recesses 12 below the vertical ribs 20 so as to coincide with the vertical ribs 20 in the circumferential direction. This makes it easier to form an air passage for outside air from the vertical ribs 20 toward the recesses 12, and makes it easier to peel the inner layer body 3 from the outer layer body 2 at the step portion 11.

[0045] Furthermore, two sub-longitudinal ribs 21 are provided between each pair of adjacent longitudinal ribs 20 in the shoulder portion 5. Each sub-longitudinal rib 21 has the same groove width as the longitudinal rib 20 but a smaller vertical dimension than the longitudinal rib 20, and extends from below the upper end of the longitudinal rib 20 to the same vertical position as the lower end of the longitudinal rib 20. That is, in a predetermined range extending downward from the upper end of the shoulder portion 5, only the longitudinal ribs 20 are provided, and no sub-longitudinal ribs 21 are provided. The number of sub-longitudinal ribs 21 provided between each pair of adjacent longitudinal ribs 20 is not limited to two, and may be, for example, one, or three or more.

[0046] In this way, by providing a secondary vertical rib 21 in addition to multiple vertical ribs 20 on the shoulder portion 5, an air passage for outside air can be more easily formed between the outer layer 2 and the inner layer 3 from the outside air inlet 9 provided in the mouth portion 4 toward the body portion 6, making it even easier to peel the inner layer 3 from the outer layer 2.

[0047] Furthermore, by providing the shoulder portion 5 with sub-vertical ribs 21 in addition to the multiple vertical ribs 20, the vertical ribs 20 and the sub-vertical ribs 21 can effectively prevent the inner layer 3 from sticking to the outer layer 2 at the lower end portion of the shoulder portion 5, and at the upper end portion of the shoulder portion 5, the multiple vertical ribs 20 prevent the inner layer 3 from sticking to the outer layer 2, while only the multiple vertical ribs 20 are provided, thereby ensuring the shapeability of that portion during blow molding and preventing the failure to form an airway for outside air.

[0048] As described above, in the delaminating container 1 of this embodiment, the lower ends of the multiple vertical ribs 20 and the multiple sub-vertical ribs 21 provided on the shoulder portion 5 are located higher than the lower end of the shoulder portion 5, so that the lateral rigidity of the lower end portion of the shoulder portion 5 can be increased compared to a configuration in which the multiple vertical ribs 20 and the multiple sub-vertical ribs 21 are extended to the lower end of the shoulder portion 5. This makes it possible to prevent the delaminating container 1 from being crushed on the conveyor line and to prevent the body portion 6 from losing its restorability after being squeezed.

[0049] In the shoulder portion 5, a plurality of recesses 23 each having a vertical dimension smaller than that of the longitudinal rib 20 are provided below the longitudinal rib 20 and offset in the circumferential direction with respect to the longitudinal rib 20. In this embodiment, a plurality of recesses 23 (12 in the illustrated example) formed in a circular shape with the same vertical and circumferential dimensions are provided at equal intervals in the circumferential direction so as to be located below the circumferential center positions of the two corresponding sub-longitudinal ribs 21, i.e., below the gap between the two sub-longitudinal ribs 21. Each recess 23 has a shape in which both the outer layer 2 and the inner layer 3 are recessed toward the radial inside. When three or more sub-longitudinal ribs 21 are provided between a pair of longitudinal ribs 20, the recess 23 may be provided below the circumferential center positions of any adjacent sub-longitudinal rib 21 or below the circumferential center positions of all adjacent sub-longitudinal ribs 21 among the three or more sub-longitudinal ribs 21. In addition, when only one sub-longitudinal rib 21 is provided between a pair of longitudinal ribs 20, a recess 23 may be provided below the circumferential center position of the longitudinal rib 20 and the sub-longitudinal rib 21.

[0050] In the peelable laminated container 1 of this embodiment, a plurality of recesses 23 are provided circumferentially offset from the vertical ribs 20 below the vertical ribs 20, i.e., in the lower end portion of the shoulder portion 5 where the plurality of vertical ribs 20 are not provided. Therefore, even if the lower ends of the plurality of vertical ribs 20 and the lower ends of the plurality of secondary vertical ribs 21 are each located above the lower end of the shoulder portion 5, the plurality of recesses 23 improve the peelability of the inner layer 3 from the outer layer 2 in the portion (lower end portion) between the lower ends of the vertical ribs 20 of the shoulder portion 5 and the lower end of the shoulder portion 5, and prevent the inner layer 3 from sticking to the outer layer 2 in that portion, making it difficult to create an airway.

[0051] In particular, when the peelable laminate container 1 is a blow-molded product in which the outer layer 2 and inner layer 3 are made of polyethylene terephthalate, as in this embodiment, it becomes difficult for the inner layer 3 to peel off from the outer layer 2 at the lower end portion of the shoulder 5. However, by providing a plurality of recesses 23 circumferentially offset from the vertical rib 20 at the lower end portion of the shoulder 5, as in this embodiment, it becomes possible to make it easier to peel the inner layer 3 from the outer layer 2 at the lower end portion of the shoulder 5 even in such a peelable laminate container 1.

[0052] Furthermore, since the multiple recesses 23 are arranged circumferentially offset with respect to the vertical ribs 20, the lateral rigidity of the lower end portion of the shoulder portion 5 can be increased compared to a configuration in which the multiple vertical ribs 20 and the multiple sub-vertical ribs 21 are extended to the lower end of the shoulder portion 5, thereby preventing the peelable laminated container 1 from being crushed on the conveying line and preventing a decrease in the restoring ability of the body portion 6 after squeezing.

[0053] As shown as a modified example in Fig. 4, the recesses 23 may be elongated in such a way that the vertical dimension is greater than the circumferential dimension. That is, the recesses 23 may be configured as vertical ribs whose vertical dimension is shorter than the vertical rib 20. In this modified example, the recesses 23 are so-called recessed ribs in which both the outer layer 2 and the inner layer 3 are recessed radially inward, and the vertical dimension and groove width are the same. Note that in Fig. 4, for convenience, only one recess 23 is labeled with a reference symbol.

[0054] In this way, by making the multiple recesses 23 elongated in such a way that the vertical dimension is greater than the circumferential dimension, it becomes easier to peel the inner layer 3 from the outer layer 2 over a wider range in the vertical direction of the lower end portion of the shoulder portion 5, and it is possible to more effectively prevent the inner layer 3 from sticking to the outer layer 2 in that portion, making it difficult to create an airway.

[0055] 4 as a modified example, the recesses 23 may be provided below the circumferential center positions of the two sub-longitudinal ribs 21 and below the circumferential center positions of the longitudinal ribs 20 and the sub-longitudinal ribs 21. In other words, the same number of recesses 23 as the total number of the longitudinal ribs 20 and the sub-longitudinal ribs 21 may be provided in a circumferentially shifted arrangement at equal intervals with respect to the longitudinal ribs 20 and the sub-longitudinal ribs 21.

[0056] In this manner, by providing a plurality of recesses 23 below the circumferential center positions of the two secondary longitudinal ribs 21 and below the circumferential center positions of the longitudinal ribs 20 and the secondary longitudinal ribs 21, it becomes easier to peel the inner layer 3 from the outer layer 2 over a wider circumferential range of the lower end portion of the shoulder portion 5, and it is possible to more effectively prevent the inner layer 3 from sticking to the outer layer 2 in that portion, making it difficult to create an airway.

[0057] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and scope of the present invention.

[0058] For example, in the above embodiment, the multiple recesses 23 are circular in shape with the same vertical and circumferential dimensions, or elongated in shape with the vertical dimension greater than the circumferential dimension, but this is not limited thereto, and the shape can be modified in various ways as long as the vertical dimension is smaller than that of the vertical rib 20.

[0059] The number and arrangement of the multiple recesses 23 can be changed in various ways as long as they are provided in the shoulder portion 5 below the vertical rib 20 and circumferentially offset from the vertical rib 20. It is preferable that the multiple vertical ribs 20 and the multiple recesses 23 are each arranged at equal intervals in the circumferential direction.

[0060] Furthermore, in the above embodiment, the mouth portion 4, the shoulder portion 5 and the body portion 6 each have a shape in which the cross section perpendicular to the axis O is circular, but this is not limited thereto, and the cross section may have other shapes, such as a polygonal or elliptical shape.

[0061] Furthermore, in the above embodiment, the outside air inlet 9 is provided in the portion constituting the mouth portion 4 of the outer layer 2 as a through hole penetrating said portion in the radial direction, but this is not limited to this and it may be provided in any portion of the shoulder portion 5, body portion 6 or bottom portion 7 as long as it is configured to be able to introduce outside air between the outer layer 2 and the inner layer 3, and its shape is also not limited to a through hole but may be a slit-like shape or a gap-like shape opening at the boundary between the outer layer 2 and the inner layer 3.

[0062] Furthermore, the sub-longitudinal rib 21, the recessed portion 12, the step portion 11, or the rib portion may not be provided. [Explanation of symbols]

[0063] 1. Delaminated container 2 Outer body 3. Inner layer 4 Mouth 4a Male thread 5 Shoulder 6. Torso 6a Squeeze Region 6b Reinforcement area 6c Circular rib 7 Bottom 8 Neck Ring 9. Fresh air intake 11 Step 12 Recess 20 Vertical ribs 21 Secondary vertical rib 23 Recess O axis S Storage space

Claims

1. A peelable laminated container having a bottle shape with a mouth, a shoulder, a body and a bottom, the container comprising 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, and an air inlet provided at the mouth and connected between the outer layer and the inner layer, On the shoulder, A plurality of vertical ribs each recessed radially inward and extending downward from an upper end of the shoulder portion are arranged at intervals in the circumferential direction, The lower end of each of the longitudinal ribs is located above the lower end of the shoulder portion, A delaminating container characterized in that a plurality of recesses, each of which has a vertical dimension smaller than that of the vertical rib, are provided in the shoulder portion below the vertical rib and circumferentially offset relative to the vertical rib.

2. The delamination container according to claim 1 , wherein the recess has a circular shape with the vertical dimension and the circumferential dimension being the same.

3. The delamination container according to claim 1 , wherein the recess has an elongated shape in which the vertical dimension is greater than the circumferential dimension.

4. A plurality of sub-longitudinal ribs are provided between adjacent pairs of the longitudinal ribs of the shoulder portion, each of which extends from below the upper end of the longitudinal rib to the same vertical position as the lower end of the longitudinal rib, 4. The delamination container according to claim 1, wherein the recess is provided below a circumferential center position of adjacent sub-longitudinal ribs among the plurality of sub-longitudinal ribs.

5. A sub-longitudinal rib is provided between each pair of adjacent longitudinal ribs of the shoulder portion, the sub-longitudinal rib extending from below the upper end of the longitudinal rib to the same vertical position as the lower end of the longitudinal rib, 5. The delamination container according to claim 1, wherein the recess is provided below a circumferential center position of the longitudinal rib and the sub-longitudinal rib.

6. The delamination container according to any one of claims 1 to 5, wherein the body portion has a squeeze region that is continuous with the shoulder portion via a circumferential step portion or a circumferential rib portion.

7. 7. The delaminating container according to claim 1, wherein the outer layer and the inner layer are made of polyethylene terephthalate.

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