JP2021133972A - Delamination container - Google Patents

Abstract

To provide a delamination container whose squeezing operability is enhanced while enhancing buckling strength.SOLUTION: There is provided a synthetic resin-made delamination container 1 comprising an outer layer body 10, an inner layer body 20, and an outside air introduction port 15. A shoulder part 12 of the outer layer body 10 comprises a shoulder upper part 12a, a shoulder lower part 12b, and a shoulder connection part 12c. A contour of the shoulder upper part 12a and a contour of the shoulder lower part 12b each in a front view are a line or a curve whose radius is 100 mm or more, that outwardly protrudes from the container. A contour of the shoulder connection part 12c in the front view is a curve whose radius is less than 100 mm, that outwardly protrudes from the container. Further, in the front view, an upward-downward direction dimension H1 to a lower end of the shoulder lower part 12b from an intersection point P1 between an upper side tangential line TL1 coming into contact with an upper end of the contour of the shoulder connection part 12c and a lower side tangential line TL2 coming into contact with a lower end of the contour of the shoulder connection part 12c is 40 to 60% of an upward-downward direction dimension H2 of the shoulder part 12.SELECTED DRAWING: Figure 3

Description

The present invention is a laminate made of a synthetic resin having an outer layer body, an inner layer body detachably laminated on the inner surface of the outer layer body, and an outside air introduction port for introducing outside air between the outer layer body and the inner layer body. Regarding the peeling container.

As a container for storing food seasonings such as soy sauce, beverages, cosmetics, shampoo, rinse, liquid soap, etc. as the content liquid, the outer layer, the inner layer that is detachably laminated on the inner surface of the outer layer, and the outer layer It has a double structure with an outside air inlet for introducing outside air between it and the inner layer, and the outer layer has a tubular mouth, a shoulder that is integrally connected to the lower end of the mouth, and a shoulder. There is known a laminated peeling container made of synthetic resin, which is formed in a bottle shape having a tubular body portion integrally connected to the lower end of the body and a bottom portion integrally connected to the lower end of the body portion (for example, Patent Document). 1).

The laminated peeling container, which is also called a delamination container, is used as a squeeze-type pouring container equipped with a pouring cap having a check valve at the mouth, and squeezes the body of the outer layer body. As a result, the content liquid can be poured out. On the other hand, after the content liquid is poured out, the outside air is introduced between the outer layer body and the inner layer body from the outside air introduction port, so that only the storage portion of the inner layer body is reduced while the outer layer body is restored or maintained in its original shape. It can be transformed. Therefore, according to the laminated stripping container, the content liquid stored in the storage portion of the inner layer body is discharged to the outside without being replaced with the outside air, and the outside air to the content liquid stored inside the inner layer body is discharged. It is possible to reduce contact and suppress deterioration and deterioration of the content liquid.

JP-A-2019-177908

However, in the conventional laminated peeling container, the shoulder portion of the outer layer body is smoothly curved toward the inside of the container at the upper portion connected to the lower end of the mouth portion, and the lower portion connected to the upper end of the body portion is outside the container. Since the shoulder shape is formed by stroking the shoulder smoothly so as to be convex, for example, in a laminated peeling container filled with the content liquid, when a downward load is applied to the mouth portion, the load causes the shoulder portion. There is a problem that the upper end portion connected to the shoulder portion of the torso is deformed into a flat or triangular shape by directly joining the torso through the body.

In order to prevent such deformation of the body, it is conceivable to provide a peripheral groove, a stepped portion, etc. in the body to increase the rigidity of the body, but the laminated peeling container is a squeeze type. When used as a pouring container, if the rigidity of the body portion is increased, there arises a problem that the squeeze operability (discharge operability) when discharging the content liquid is lowered.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a laminated peeling container having improved squeeze operability while increasing buckling strength.

The laminated release container of the present invention has an outer layer body, an inner layer body that is detachably laminated on the inner surface of the outer layer body, and an outside air introduction port for introducing outside air between the outer layer body and the inner layer body. A synthetic resin laminated peeling container having a tubular mouth portion, a shoulder portion integrally connected to the lower end of the mouth portion, and a tubular shape integrally connected to the lower end of the shoulder portion. A body portion and a bottom portion integrally connected to the lower end of the body portion, and an upper shoulder portion integrally connected to the lower end portion of the mouth portion and a lower shoulder portion integrally connected to the upper end portion of the body portion. A curve or a curve having a radius of 100 mm or more in which the contour of the upper shoulder and the contour of the lower shoulder in front view are convex to the outside of the container, respectively. It is a straight line, and the contour of the shoulder connection portion in the front view is a curve having a radius of less than 100 mm convex to the outside of the container, and in the front view, the upper tangent line in contact with the upper end of the contour of the shoulder connection portion and the said. The vertical dimension from the intersection with the lower tangent line in contact with the lower end of the contour of the shoulder connection portion to the lower end of the lower shoulder portion is 40 to 60% of the vertical dimension of the shoulder portion.

In the laminated peeling container of the present invention, in the above configuration, the contour of the upper shoulder in the front view is a straight line, and the contour of the lower shoulder in the front view is a curve having a radius of 100 mm or more convex outward from the container. Is preferable.

In the above-mentioned configuration, the laminated peeling container of the present invention preferably has a substantially circular contour of the shoulder portion in a plan view.

In the above-mentioned configuration, the laminated peeling container of the present invention preferably has the outside air introduction port as a through hole penetrating the port portion in the radial direction.

In the above-mentioned configuration, the laminated peeling container of the present invention has a plurality of concave ribs having shoulder portions extending in the vertical direction and arranged at equal intervals in the circumferential direction, and a plurality of concave ribs extending in the vertical direction and arranged at equal intervals in the circumferential direction. Moreover, it is preferable to have a plurality of convex ribs arranged between the adjacent concave ribs.

In the laminated peeling container of the present invention, it is preferable that the outer layer body and the inner layer body are each made of polyethylene terephthalate resin in the above configuration.

In the above configuration, the laminated peeling container of the present invention is formed by blow molding a preform assembly incorporating the inner preform corresponding to the inner layer body inside the outer preform corresponding to the outer layer body. It is preferably a molded product.

According to the present invention, it is possible to provide a laminated peeling container having improved squeeze operability while increasing buckling strength.

It is a front view which shows the laminated peeling container which is one Embodiment of this invention by cutting out a part thereof. It is a top view of the laminated peeling container shown in FIG. It is an enlarged front view which shows the main part of the laminated peeling container shown in FIG. 1 in an enlarged manner.

Hereinafter, the laminated peeling container 1 according to the embodiment of the present invention will be described in more detail with reference to the drawings.

In the present specification, claims and drawings, the vertical direction means the vertical direction in a state where the laminated peeling container 1 is in an upright position as shown in FIG. 1, and the radial direction is laminated. It is assumed to mean a direction that passes through the axis O of the peeling container 1 and follows a straight line perpendicular to the axis O.

The laminated peeling container (delamination container) 1 according to the embodiment of the present invention shown in FIGS. 1 to 3 is a synthetic container used as a squeeze-type pouring container for storing food seasonings such as soy sauce as a content liquid. It is made of resin and has a double structure having an outer layer body 10 and an inner layer body 20.

In the present embodiment, both the outer layer body 10 and the inner layer body 20 are made of polyethylene terephthalate resin (PET). Since the outer layer body 10 and the inner layer body 20 are each made of polyethylene terephthalate resin, the laminated stripping container 1 is lightweight and highly transparent.

The outer layer body 10 is a portion constituting the outer shell of the laminated peeling container 1, and is integrally connected to the tubular mouth portion 11, the shoulder portion 12 integrally connected to the lower end of the mouth portion 11, and the lower end of the shoulder portion 12. It has a bottle shape including a tubular body portion 13 and a bottom portion 14 integrally connected to the lower end of the body portion 13.

In the present embodiment, the mouth portion 11 has a cylindrical shape, and a male screw 11a is integrally provided on the outer peripheral surface thereof. A spout cap (not shown) having a spout can be attached to the mouth 11 by screwing it to the male screw 11a.

The mouth portion 11 may be provided with an annular protrusion instead of the male screw 11a, and the pouring cap may be mounted by engaging the protrusion in an undercut shape by a stopper. In this case, the mouth portion 11 is not limited to a cylindrical shape, and may have a cylindrical shape, for example, a square tubular shape or an elliptical tubular shape.

The mouth portion 11 is provided with a pair of outside air introduction ports 15. Each of the pair of outside air introduction ports 15 is a through hole that penetrates the mouth portion 11 of the outer layer body 10 in the radial direction, and is arranged symmetrically on both sides of the mouth portion 11 with the axial center O interposed therebetween. The pair of outside air introduction ports 15 communicate with each other between the outer layer body 10 and the inner layer body 20, and the outside air can be introduced between the outer layer body 10 and the inner layer body 20.

A neck ring 16 is integrally provided below the outside air introduction port 15 of the mouth portion 11. The neck ring 16 extends in an annular shape over the entire circumference of the mouth portion 11, and projects outward from the outer peripheral surface of the mouth portion 11 in the radial direction. Further, the portion of the mouth portion 11 below the neck ring 16 is a cylindrical portion 17. The mouth portion 11 may be configured so that the neck ring 16 is not provided.

The shoulder portion 12 has a substantially circular contour or cross-sectional shape in a plan view, and has a shape in which the diameter gradually increases from the upper end to the lower end, and projects outward in the radial direction with respect to the mouth portion 11. ing. The detailed shape of the shoulder portion 12 will be described later.

The body portion 13 has a substantially cylindrical shape as a whole, and is integrally connected to the lower end of the shoulder portion 12 at the upper end thereof. An upper step portion 13a recessed inward in the radial direction with respect to the lower end of the shoulder portion 12 is provided on the upper end side portion of the body portion 13, and a cylindrical squeeze having a constant outer diameter is provided at the lower end of the upper step portion 13a. The portions 13b are integrally provided in a row. The squeeze portion 13b has flexibility, and can be elastically deformed and dented by being squeezed (squeezed), and can be restored from the dented state to the original shape by itself due to the elastic force. .. Below the squeeze portion 13b, a diameter-expanded portion 13c having a diameter larger than that of the squeeze portion 13b is provided, and between the squeeze portion 13b and the diameter-expanded portion 13c, inward in the radial direction with respect to the diameter-expanded portion 13c. A recessed lower step portion 13d is provided. The enlarged diameter portion 13c is provided with two peripheral grooves 13e.

It should be noted that the upper step portion 13a may be provided with a plurality of recessed portions 13f arranged at equal intervals in the circumferential direction.

The bottom portion 14 is integrally connected to the lower end of the enlarged diameter portion 13c of the body portion 13 and closes the lower end of the body portion 13. The bottom portion 14 has a shape in which the inside of the outer peripheral edge of the annular shape is recessed, and the laminated peeling container 1 can be arranged in an upright posture by grounding the bottom portion 14.

The shapes of the mouth portion 11, the body portion 13 and the bottom portion 14 are not limited to the above and can be changed in various ways.

The inner layer body 20 has a bag shape thinner than that of the outer layer body 10, and is laminated on the inner surface of the outer layer body 10 so as to be peelable. The lamination of the inner layer body 20 to the outer layer body 10 may be any of peeling from the bonded state, peeling from the pseudo-bonded state, and peeling from the close contact state. The inside of the inner layer body 20 is a storage space 21 connected to the mouth portion 11, and the inner layer body 20 can store the content liquid in the storage space 21. As the content liquid is poured out from the storage space 21, the inner layer body 20 can be deformed in a volume-reducing manner so as to reduce the inner volume thereof while peeling from the inner surface of the outer layer body 10.

In the present embodiment, the laminated peeling container 1 is an injection-molded product made of synthetic resin corresponding to the inner layer 20 inside the outer preform which is an injection-molded product made of synthetic resin corresponding to the outer layer 10. It is a blow-molded product formed by blow-molding a double-structured preform assembly incorporating a preform. In this case, the inner layer body 20 includes a cylindrical inner mouth portion arranged inside the mouth portion 11, and the portion excluding the inner mouth portion, that is, the shoulder portion 12, the body portion 13, and the bottom portion 14 of the outer layer body 10. Only in the portion laminated on the inner surface, the outer layer body 10 can be peeled off and the volume can be reduced and deformed.

The laminated peeling container 1 of the present embodiment having the above configuration can be configured as a squeeze container by attaching a pouring cap to the mouth portion 11. In this case, the injection caps include, for example, a check valve for outside air that allows the introduction of outside air into the outside air introduction port 15 and prevents the outflow of outside air from the outside air introduction port 15 to the outside, and the inner layer body 20. A configuration provided with a check valve for the content liquid that allows the content liquid stored in the storage space 21 to be discharged to the outside and prevents the backflow of outside air into the storage space 21 of the inner layer body 20. Can be used.

As shown in FIG. 3, in the laminated peeling container 1 of the present embodiment, the shoulder portion 12 includes an upper shoulder portion 12a integrally connected to the lower end of the mouth portion 11 and a lower shoulder portion 12b integrally connected to the upper end of the body portion 13. , The shoulder connection portion 12c that connects the upper shoulder 12a and the lower shoulder 12b is integrally provided, and the upper shoulder 12a and the lower shoulder 12b each have a radius of 100 mm or more in which the contour in front view is convex outward of the container. The shape of the shoulder connecting portion 12c is a curved shape or a straight shape, and the contour of the shoulder connecting portion 12c is a curved shape having a radius of less than 100 mm that is convex outward of the container, and the shoulder connecting portion is formed in the front view. The vertical dimension H1 from the intersection P1 of the upper tangent line TL1 in contact with the upper end E1 of the contour of the 12c and the lower tangent line TL2 in contact with the lower end E2 of the contour of the shoulder connecting portion 12c to the lower end of the lower shoulder 12b is the shoulder portion 12. It is configured to have a shape that is 40 to 60% of the entire vertical dimension H2.

In the laminated peeling container 1 of the present embodiment, the upper shoulder 12a has a shape in which the contour in the front view is straight. The straight line along the contour of the upper shoulder 12a in the front view is inclined with respect to the axial center O so as to move downward from the axial center O. That is, the upper shoulder 12a has a truncated cone shape in which the diameter increases to a certain degree from the upper end to the lower end.

Further, in the laminated peeling container 1 of the present embodiment, the lower shoulder 12b has a shape in which the contour in the front view is a curve having a radius of 150 mm convex to the outside of the container. The outer diameter of the lower shoulder 12b centered on the axis O is the largest at the lower end. That is, the lower shoulder 12b has a substantially barrel shape in which the diameter gradually decreases from the lower end to the upper end. Further, the lower shoulder 12b has a shape in which the tangent line at the lower end thereof is parallel to the axis O, and as a whole, rises upward from the upper end of the body portion 13 substantially parallel to the axis O. ..

The shoulder connection portion 12c has a shape in which the contour in front view is curved with a radius of less than 100 mm convex to the outside of the container, but the contour in front view has a radius of convex to the outside of the container of 50 mm or less. It is preferable that the shape is a curve of, and it is more preferable that the contour in the front view is a curve having a radius of less than 40 mm that is convex outward of the container. In the laminated peeling container 1 of the present embodiment, the shoulder connection portion 12c has a shape in which the contour in the front view is a curve having a radius of 25 mm that is convex outward of the container. That is, the shoulder connecting portion 12c has a curved surface that is more strongly curved than the upper shoulder 12a and the lower shoulder 12b.

Further, in the laminated peeling container 1 of the present embodiment, the shoulder portion 12 has an upper tangent line TL1 which is in contact with the upper end of the contour of the shoulder connection portion 12c and a lower tangent line TL2 which is in contact with the lower end of the contour of the shoulder connection portion 12c in the front view. The vertical dimension H1 from the intersection P1 with the shoulder to the lower end of the lower shoulder 12b is 49% of the entire vertical dimension H2 of the shoulder portion 12.

As described above, in the laminated peeling container 1 of the present embodiment, the outer diameter of the shoulder portion 12 centered on the axial center O gradually expands in the portion of the upper shoulder portion 12a from the upper end to the lower end, and the shoulder portion 12 The degree of expansion of the outer diameter is reduced in the connecting portion 12c, the outer diameter centered on the axial center O is slightly expanded in the shoulder lower portion 12b, and the contour of the shoulder connecting portion 12c is viewed from the front. The vertical dimension H1 from the intersection P1 between the upper tangent line TL1 in contact with the upper end E1 of the shoulder and the lower tangent line TL2 in contact with the lower end E2 of the contour of the shoulder connecting portion 12c to the lower end of the lower shoulder 12b is the upper and lower sides of the entire shoulder portion 12. Since the shoulder shape is 40 to 60% of the directional dimension H2, the shoulder portion 12 is in the shape of a stroking shoulder. When a load is applied, the stress of the shoulder portion 12 due to the load is distributed in the radial direction, and the upper end portion of the body portion 13 connected to the shoulder portion 12 is deformed into a flat or triangular shape. It is possible to prevent this from happening. Therefore, it is possible to increase the buckling strength of the laminated peeling container 1 when a downward load is applied to the mouth portion 11.

In order to verify the effect of the present invention, in order to verify the effect of the present invention, the laminated peeling container of the embodiment having the same configuration as the laminated peeling container 1 of the above-described embodiment and the contour of the upper shoulder in front view are convex outward of the container. The curve has a radius of 90 mm, the contour of the lower part of the shoulder in front view is a curve having a radius of 60 mm convex to the outside of the container, and the contour of the shoulder connection portion in front view is convex to the outside of the container. It is a curve with a radius of 40 mm, and in front view, the vertical direction from the intersection of the upper tangent line that touches the upper end of the contour of the shoulder connection and the lower tangent line that touches the lower end of the contour of the shoulder connection to the lower end of the lower shoulder. A comparative example laminated peeling container having a shoulder having a shape in which the size is 32% of the total vertical dimension of the shoulder is prepared, and these two laminated peeling containers are filled with the content liquid and are mouthed. A test was conducted to measure the buckling strength when a downward load was applied to the part.

The buckling strength of the laminated peeling container of the example in the test was 389N. Further, in the laminated peeling container of the example, the portion deformed by buckling was the bottom portion, and the upper end portion connected to the shoulder portion of the body portion was not deformed. On the other hand, the buckling strength of the laminated peeling container of the comparative example was 272N, and the portion deformed by buckling was the upper end portion connected to the shoulder portion of the body portion. From this test result, it was confirmed that according to the present invention, it is possible to increase the buckling strength of the laminated peeling container 1 filled with the content liquid and suppress the deformation of the upper end portion connected to the shoulder portion of the body portion. Was done.

Further, in the laminated peeling container 1 of the present embodiment, since the buckling strength of the laminated peeling container 1 can be increased by the shape of the shoulder portion 12, it is not necessary to increase the rigidity of the body portion 13. It is possible to improve the squeeze operability (discharge operability) of the body portion 13 when discharging the content liquid.

Further, in the laminated peeling container 1 of the present embodiment, since the shoulder portion 12 has the above-mentioned shape, the content (internal volume) of the laminated peeling container 1 is compared with the laminated peeling container in which the shoulder portion 12 has the shape of a stroking shoulder. ) Can be increased without changing the outer diameter or height of the container.

Further, in the laminated peeling container 1 of the present embodiment, the contour of the upper shoulder 12a in the front view is a straight line, and the contour of the lower shoulder 12b in the front view is a curve having a radius of 100 mm or more that is convex outward of the container. When a downward load is applied to the mouth portion 11, most of the stress due to the load is radially dispersed in the upper shoulder 12a, and in the lower shoulder 12b, the stress due to the load is radially distributed. By suppressing the dispersion, it is possible to suppress excessive application of a radial outward force to the upper end of the body portion 13 and more effectively suppress the deformation of the upper end portion connected to the shoulder portion 12 of the body portion 13. can do.

Further, in the laminated peeling container 1 of the present embodiment, since the contour of the shoulder portion 12 in a plan view is substantially circular, when a downward load is applied to the mouth portion 11, the stress due to the load is applied to the shoulder. Deformation of the upper end portion of the body portion 13 connected to the shoulder portion 12 can be more effectively suppressed by uniformly dispersing in the radial direction over the entire circumference of the portion 12.

Further, in the laminated peeling container 1 of the present embodiment, a cylindrical squeeze portion 13b is provided between the upper step portion 13a and the lower step portion 13d, and the squeeze portion 13b is elastically deformable by squeeze. Therefore, the squeeze operability of the body portion 13 when discharging the content liquid can be further improved.

Further, in the laminated peeling container 1 of the present embodiment, since the outside air introduction port 15 is provided in the mouth portion 11 as a through hole through which the mouth portion 11 penetrates in the radial direction, the shoulder portion 12 or the body portion 13 is provided. The squeeze operability of the body portion 13 can be further improved as compared with the case where the outside air introduction port is provided.

As shown in FIGS. 1 to 3, the shoulder portions 12 have a plurality of concave ribs 30 extending in the vertical direction and arranging at equal intervals in the circumferential direction, and extending in the vertical direction and arranging at equal intervals in the circumferential direction, respectively. A plurality of convex ribs 31 arranged between adjacent concave ribs 30 may be provided. For convenience, in FIGS. 1 to 3, only one concave rib 30 and the convex rib 31 are designated by reference numerals. In the present embodiment, the shoulder portion 12 is provided with 16 concave ribs 30 and 16 convex ribs 31, but the number of these can be appropriately set.

The plurality of concave ribs 30 have the same shape as each other, and are recessed toward the inside of the container with respect to the outer surface of the shoulder portion 12, respectively. Further, the plurality of concave ribs 30 extend in the vertical direction so as to reach the lower shoulder 12b via the shoulder connecting portion 12c from the upper shoulder 12a, respectively, and the lower portion has a width smaller in the circumferential direction than the upper portion. There is.

In this way, by providing the shoulder portion 12 with a plurality of concave ribs 30 extending in the vertical direction and arranging at equal intervals in the circumferential direction, the body portion is provided from the outside air introduction port 15 provided in the mouth portion 11. The inner layer 20 can be easily separated from the outer layer 10 by easily forming a passage for outside air between the outer layer 10 and the inner layer 20 toward 13.

The plurality of convex ribs 31 have the same shape as each other, and each protrudes slightly toward the outside of the container with respect to the outer surface of the shoulder portion 12. Further, the plurality of convex ribs 31 extend in the vertical direction so as to reach the lower shoulder 12b from the upper shoulder 12a via the shoulder connecting portion 12c, and the lower portion has a larger width in the circumferential direction than the upper portion. There is.

In the laminated peeling container 1 of the present embodiment, by providing the convex ribs 31 between the plurality of concave ribs 30, for example, a shrink wrapping material such as a shrink label is provided on the portion of the laminated peeling container 1 including the shoulder portion 12. A gap can be formed between the shrink wrapping material and the outer surface of the portion adjacent to the concave rib 30 of the shoulder portion 12 in the circumferential direction. Therefore, heat conduction from the heated shrink wrapping material to the peripheral portion of the concave rib 30 is suppressed by the gap, and as a result, the inner layer 20 is suppressed from sticking to the outer layer 10 due to heating in the portion, so that the concave It is possible to more reliably realize that the rib 30 forms a passage for outside air between the outer layer body 10 and the inner layer body 20.

It goes without saying that the present invention is not limited to the above-described embodiment and can be variously modified without departing from the gist thereof.

For example, in the above-described embodiment, the shoulder portion 12 has a curve in which the contour of the upper shoulder 12a in the front view is a straight line and the contour of the lower shoulder 12b in the front view is convex outward of the container with a radius of 100 mm or more. However, the contour is not limited to this, and the contour of the upper shoulder 12a and the contour of the lower shoulder 12b in the front view may be a curve or a straight line having a radius of 100 mm or more convex to the outside of the container, respectively, and a combination thereof. Can be changed in various ways.

Further, in the above-described embodiment, the contour of the shoulder portion 12 in a plan view is substantially circular, but the present invention is not limited to this, and a polygonal shape such as a quadrangle may be used.

Further, in the above-described embodiment, the outside air introduction port 15 is a through hole that penetrates the mouth portion 11 in the radial direction, but the present invention is not limited to this. The configuration may be provided on the bottom portion 14, and the number thereof can be changed as appropriate.

Further, in the above embodiment, the shoulder portion 12 is provided with the plurality of concave ribs 30 and the plurality of convex ribs 31, but the present invention is not limited to this, and the plurality of concave ribs 30 and the plurality of convex ribs 31 are provided. It is also possible to have a configuration in which both or one of them is not provided.

Further, in the above-described embodiment, the outer layer body 10 is made of polyethylene terephthalate resin, but the present invention is not limited to this, for example, polyester resin, polyolefin resin, nylon resin, polycarbonate resin (PC resin), cycloolefin copolymer resin (COC resin). ), Other synthetic resin materials such as cycloolefin polymer resin (COP resin) may be used.

Further, in the above-described embodiment, the inner layer 20 is made of polyethylene terephthalate resin, but the present invention is not limited to this, for example, polyester resin, polyolefin resin, nylon resin, polycarbonate resin (PC resin), cycloolefin copolymer resin (COC resin). ), Cycloolefin polymer resin (COP resin), ethylene-vinyl alcohol copolymer resin (EVOH resin) and other synthetic resin materials. When the inner layer 20 is made of an ethylene-vinyl alcohol copolymer resin, one having an appropriate ethylene content can be adopted in consideration of barrier properties and flexibility. Further, the inner layer body 20 may have a multi-layer structure in which a barrier layer such as an MX nylon resin layer is provided between a pair of polyethylene terephthalate resin layers, for example, in order to secure the barrier property.

1 Laminated peeling container 10 Outer layer body 11 Mouth 11a Male screw 12 Shoulder 12a Shoulder upper 12b Shoulder lower 12c Shoulder connection 13 Body 13a Upper step 13b Squeeze 13c Diameter expansion 13d Lower step 13e Circumferential groove 13f Recess 14 Bottom 15 Outside air inlet 16 Neck ring 17 Cylindrical part 20 Inner layer 21 Storage space 30 Concave rib 31 Convex rib O Axis center TL1 Upper tangent TL2 Lower tangent E1 Upper end E2 Lower end P1 Intersection H1 Vertical dimension H2 Vertical dimension

Claims (7)

Laminated peeling made of synthetic resin having an outer layer body, an inner layer body releasably laminated on the inner surface of the outer layer body, and an outside air introduction port for introducing outside air between the outer layer body and the inner layer body. It ’s a container,
The outer layer is
With a tubular mouth
A shoulder part that is integrally connected to the lower end of the mouth part,
A tubular body that is integrally connected to the lower end of the shoulder,
It is provided with a bottom portion integrally connected to the lower end of the body portion, and is provided with a bottom portion.
The shoulder
The upper part of the shoulder, which is integrally connected to the lower end of the mouth,
The lower part of the shoulder, which is integrally connected to the upper end of the torso,
A shoulder connection portion for connecting the upper shoulder and the lower shoulder is provided.
The contour of the upper shoulder and the contour of the lower shoulder in the front view are curved lines or straight lines having a radius of 100 mm or more that is convex outward of the container, respectively.
The contour of the shoulder connection portion in the front view is a curved line having a radius of less than 100 mm that is convex outward of the container.
In front view, the vertical dimension from the intersection of the upper tangent line tangent to the upper end of the contour of the shoulder connection portion and the lower tangent line tangent to the lower end of the contour of the shoulder connection portion to the lower end of the lower shoulder portion is the shoulder portion. A laminated peeling container characterized in that it is 40 to 60% of the vertical dimension of the above. The contour of the upper shoulder in front view is a straight line,
The laminated peeling container according to claim 1, wherein the contour of the lower part of the shoulder in a front view is a curve having a radius of 100 mm or more that is convex outward of the container. The laminated peeling container according to claim 1 or 2, wherein the contour of the shoulder portion in a plan view is substantially circular. The laminated peeling container according to any one of claims 1 to 3, wherein the outside air introduction port is a through hole that penetrates the port portion in the radial direction. The shoulder
Multiple concave ribs that extend in the vertical direction and are arranged at equal intervals in the circumferential direction,
The lamination according to any one of claims 1 to 4, each having a plurality of convex ribs extending in the vertical direction, arranged at equal intervals in the circumferential direction, and arranged between the adjacent concave ribs. Peeling container. The laminated peeling container according to any one of claims 1 to 5, wherein the outer layer body and the inner layer body are each made of polyethylene terephthalate resin. Any of claims 1 to 6, which is a blow-molded product formed by blow-molding a preform assembly incorporating the inner preform corresponding to the inner layer body inside the outer preform corresponding to the outer layer body. The laminated peeling container according to item 1.

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