JP7098232B2 - Laminated peeling container - Google Patents

Description

The present invention relates to a laminated stripping container.

Blow-molding a preform assembly that incorporates the inner preform inside the outer preform, for example, as a container for storing food seasonings such as soy sauce, beverages, cosmetics, shampoo, rinse, liquid soap, etc. as the content liquid. By means of an outer layer body having a tubular outer mouth portion and a bottomed tubular body portion connected to the outer mouth portion, and a tubular inner mouth portion and an inner surface of the body portion arranged inside the outer mouth portion. A laminated peeling container (delamination container) made of a synthetic resin formed into a double structure having an inner layer body provided with a volume-reducing and deformable accommodating portion laminated so as to be peelable is known (for example, a delamination container). See Patent Document 1).

Such a laminated stripping container is used as a squeeze-type pouring container, for example, in combination with a pouring cap equipped with a check valve, and the content liquid is externally squeezed by squeezing the body of the outer layer body. Can be poured into. 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 the outer layer body is restored to the original shape and only the capacity of the inner layer body is reduced. It can be transformed. Therefore, according to the laminated stripping container, the content liquid contained in the accommodating 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 contained inside the inner layer body is discharged. It is possible to reduce contact and suppress deterioration and deterioration of the content liquid.

Japanese Unexamined Patent Publication No. 2018-2275

By the way, in such a laminated peeling container, it is necessary to ensure good resilience of the body after squeeze in order to enable smooth pouring of the content liquid. Such resilience can be obtained, for example, by forming the body portion into a cylindrical shape having a constricted portion whose diameter is gradually reduced toward the axial intermediate portion. However, as the diameter reduction width of the constricted portion is increased, the resilience is improved, but inconveniences such as a decrease in the capacity of the container also occur. Therefore, it is conceivable to give only a slight diameter reduction width to the constricted portion and to provide the constricted portion with a large number of vertical ribs over the entire circumference in order to increase the rigidity.

In Patent Document 1, it is a constricted portion provided with such a large number of vertical ribs, and the cross-sectional shape of the constricted portion is formed by connecting R portions forming a convex arc shape over the entire circumference. Is listed. However, when a large number of vertical ribs having such a configuration are provided, for example, when the reduced diameter width set in the constricted portion is small, vertical creases occur along the vertical ribs during squeeze play. There was a problem with stability.

In view of these points, it is an object of the present invention to provide a laminated stripping container that is less likely to cause vertical folds and can improve stability.

The laminated peeling container of the present invention is a laminated peeling container made of synthetic resin formed by blow molding, and is an outer layer having a cylindrical outer mouth portion and a bottomed tubular body portion connected to the outer mouth portion. An inner layer body having a tubular inner mouth portion arranged inside the outer mouth portion and a volume-reducing and deformable accommodating portion removably laminated on the inner surface of the body portion, the outer layer body, and the above. It is provided with an outside air introduction port for introducing outside air between the inner layer body, and the body portion is a substantially cylindrical body body formed by convex ribs and concave ribs alternately arranged over the entire circumference. The outer peripheral surface of the body portion is formed by an arc-shaped R portion having a radius of curvature of 1 mm to 6 mm formed on the outer surface of the convex rib and the outer surface of the concave rib in a cross section. Inverted R portions having an arc shape having a radius of curvature of 1 mm to 6 mm are smoothly and alternately connected over the entire circumference, and the convex ribs and the concave ribs are smooth with an arc having a predetermined radius of curvature. The diameter of the outer peripheral surface of the body of the body is 50 mm to 80 mm.

In the laminated peeling container of the present invention, it is preferable that the radius of curvature of the R portion and the radius of curvature of the inverted R portion are substantially the same as each other in the above configuration.

In the laminated peeling container of the present invention, it is preferable that the convex ribs and the concave ribs extend in parallel with the axial direction of the body body, respectively, in the above configuration.

In the above-mentioned configuration, in the laminated peeling container of the present invention, the body portion has a constricted portion whose diameter is gradually reduced toward the axial intermediate portion of the body portion, and the diameter-reduced width of the constricted portion is set. It is preferably 2 mm or less.

In the above-mentioned configuration, the laminated peeling container of the present invention preferably has the outside air introduction port provided in the mouth portion composed of the outer mouth portion and the inner mouth portion.

In the laminated peeling container of the present invention, in the above configuration, the outside air introduction port is preferably a through hole that penetrates the outer port portion in the radial direction.

In the above-mentioned configuration, in the laminated peeling container of the present invention, the body portion includes a shoulder portion that is connected to the outer opening portion and gradually expands in diameter downward, and the body portion that is connected below the shoulder portion. It is preferable to have a bottom portion which is connected to the lower part of the body portion and has a ground contact portion.

In the above configuration, the laminated peeling container of the present invention is preferably formed by blow molding a preform assembly having an outer preform and an inner preform incorporated inside the outer preform.

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.

According to the present invention, it is possible to provide a laminated stripping container that is less likely to cause vertical creases and can improve stability.

It is a partial cross-sectional side view which shows the laminated peeling container which concerns on one Embodiment of this invention. It is a top view which shows the laminated peeling container shown in FIG. It is a vertical sectional view which shows the mouth part of the laminated peeling container shown in FIG. FIG. 1 is a sectional view taken along the line AA of FIG. It is a partially enlarged view of FIG. It is a partially enlarged view of FIG.

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

As shown in FIG. 1, the laminated stripping container 1 according to the embodiment of the present invention is made of synthetic resin, which is also called a delamination container (derami container), and has a double layer body 10 and an inner layer body 20. It has a structure. The laminated peeling container 1 according to the present embodiment is used as a squeeze-type pouring container that stores food seasonings such as soy sauce as a content liquid. However, the content liquid is not limited to food seasonings, and may be, for example, beverages, cosmetics, shampoos, conditioners, liquid soaps, and the like.

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.

The outer layer body 10 is a portion constituting the outer shell of the laminated peeling container 1, and has a bottle shape including an outer opening portion 11 and a bottomed cylindrical body portion 12 integrally connected to the lower end of the outer opening portion 11. ing.

As shown in FIGS. 1 and 2, the outer opening portion 11 has a cylindrical shape, and a male screw 11a is integrally provided on the outer peripheral surface thereof. A pouring cap (not shown) having a spout port, which is screw-coupled to a male screw 11a, can be attached to the outer port portion 11.

The outer port portion 11 may be provided with an annular protrusion instead of the male screw 11a, and the pouring cap may be mounted by engaging with the protrusion in an undercut shape by a tapping. In this case, the outer opening 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 outer port 11 is provided with a pair of outside air introduction ports 13. The pair of outside air introduction ports 13 each have an elongated hole-shaped through hole that penetrates the outer port portion 11 in the radial direction and extends in the circumferential direction, and is symmetrical with each other on both sides of the axial center O of the outer port portion 11. Is located in. The pair of outside air introduction ports 13 communicate with each other between the outer layer body 10 and the inner layer body 20, and outside air can be introduced between the outer layer body 10 and the inner layer body 20 through these outside air introduction ports 13. ..

A neck ring 14 is integrally provided below the outside air introduction port 13 of the outer port portion 11. The neck ring 14 extends in an annular shape over the entire circumference of the outer opening portion 11 and projects outward from the outer peripheral surface of the outer opening portion 11 in the radial direction.

The body portion 12 has a shoulder portion 12a, a body portion 12b, a body portion lower portion 12c, and a bottom portion 12d. In the present embodiment, the outer opening portion 11, the shoulder portion 12a, the lower body portion 12c, and the bottom portion 12d are formed concentrically with the axial center O of the body portion 12b.

The shoulder portion 12a is integrally connected to the lower end of the outer opening portion 11 and gradually expands in diameter downward so as to project outward in the radial direction with respect to the outer opening portion 11. The body body portion 12b is formed in a substantially cylindrical shape formed by convex ribs 30 and concave ribs 31 alternately arranged over the entire circumference, and is a constricted portion whose diameter is gradually reduced toward an axial intermediate portion. It has 32. In FIG. 1, for convenience, only one convex rib 30 and concave rib 31 are designated with reference numerals. The upper end of the body portion 12b is integrally connected to the lower end of the shoulder portion 12a. The lower part of the body 12c is integrally connected to the lower end of the main body 12b, and is formed in a cylindrical shape having two annular lateral ribs 15. The bottom portion 12d is integrally connected to the lower end of the lower body portion 12c and has a ground contact portion 16. The laminated peeling container 1 can take an upright posture by grounding the grounding portion 16. In the present embodiment, the bottom portion 12d closes the lower end of the lower body portion 12c. The bottom portion 12d has a shape in which the inside of the outer peripheral edge of the annular shape is recessed.

The body body portion 12b has flexibility and can be elastically deformed by being squeezed (squeezed) and dented inward in the radial direction, and from the dented state due to the elastic force to the original shape. You can restore it on your own. By making the body body portion 12b elastically deformable by squeezing, it is possible to easily perform the pouring operation of the content liquid when the laminated peeling container 1 is used as a squeeze-type pouring container. At the same time, the body body 12b is easily restored to its original shape after the content liquid is poured, so that the outside air is surely introduced through the outside air introduction port 13 between the outer layer 10 and the inner layer 20. , The function as the laminated peeling container 1 can be surely exhibited.

In order to improve this resilience, in the present embodiment, the body body portion 12b is formed by the convex ribs 30 and the concave ribs 31, and the body body portion 12b is provided with a constricted portion 32. The convex rib 30 and the concave rib 31 substantially extend over the entire length of the body body portion 12b. As shown in FIGS. 4 and 5, the outer peripheral surface of the body body portion 12b has an arc shape formed on the outer surface of the convex rib 30 in a cross section (a cross section perpendicular to the axis O of the body body portion 12b). The R portion 30a and the inverted R portion 31a having an arc shape formed on the outer surface of the concave rib 31 are formed by being alternately and smoothly connected over the entire circumference. In FIGS. 4 and 5, for convenience, only one R portion 30a and the inverted R portion 31a are designated with reference numerals. Here, in order to obtain good resilience, it is necessary to set the radius of curvature R1 of the R portion 30a and the radius of curvature R2 of the inverted R portion 31a to 1 mm to 6 mm, respectively. Further, if either the radius of curvature R1 or the radius of curvature R2 is smaller than 1 mm, vertical creases are likely to occur in the body portion during squeeze. Further, the diameter (that is, the maximum width) of the outer peripheral surface of the body body portion 12b needs to be set to 50 mm to 80 mm. By forming the cross-sectional shape with the R portion 30a and the inverted R portion 31a having predetermined dimensions in this way, when squeeze, the R portion 30a and the inverted R portion 31a repel each other and try to return to their original state. Therefore, good resilience can be obtained. Further, by forming the convex rib 30 and the concave rib 31 into a shape in which the convex rib 30 and the concave rib 31 are smoothly connected by an arc having a predetermined radius of curvature, it is possible to prevent vertical creases from occurring in the body portion during squeeze.

Here, in order to balance the repulsive force between the R portion 30a and the reverse R portion 31a, it is preferable that the radius of curvature R1 and the radius of curvature R2 are substantially the same (that is, the same magnitude as possible). If the R portion 30a and the inverted R portion 31a are smoothly connected along a straight line, the radius of curvature R1 and the radius of curvature R2 can be set to be the same. However, in reality, it is necessary to smoothly connect the R portion 30a and the inverted R portion 31a along the arc (circumferential direction of the body body portion 12b), so that the radius of curvature R1 and the radius of curvature R2 cannot be made the same. Can not. For example, when the diameter of the body body portion 12b is 62.4 mm, the radius of curvature R1 is 2.1 mm and the radius of curvature R2 is 2.3 mm. Further, it is preferable that the convex ribs 30 and the concave ribs 31 extend in parallel with the axial direction of the body body portion 12b, respectively, in order to obtain good resilience as in the case of the present embodiment.

Further, the reduced diameter width W of the constricted portion 32 is preferably 2 mm or less (that is, 1 mm or less on one side). FIG. 6 shows the width of one side of the reduced diameter width W (1/2 of W). In the present specification, claims and drawings, the reduced diameter width W is the case where the constricted portion 32 is not provided in the cross section at the axial position where the reduced diameter amount is maximum (straight cylindrical shape). In the case), it means the length obtained by subtracting the diameter of the constricted portion 32 from the diameter of the body body portion 12b. This is because when the reduced diameter width W exceeds 2 mm, the stability is improved by providing the constricted portion 32, and the need for the convex rib 30 and the concave rib 31 is eliminated. The body body portion 12b may be formed in a straight shape without the constricted portion 32.

As shown in FIGS. 1 and 2, a plurality of (18) concave shoulder ribs 17 extending in the vertical direction are provided on the shoulder portion 12a so as to be arranged at equal intervals over the entire circumference in the circumferential direction. In FIGS. 1 and 2, for convenience, only one shoulder rib 17 is designated with a reference numeral. By providing the shoulder ribs 17 on the shoulder portion 12a, the inner layer body 20 can be easily peeled off from the outer layer body 10 at the shoulder portion 12a. It should be noted that the shoulder rib 17 may not be provided.

The inner layer 20 has an inner opening portion 21 and an accommodating portion 22.

As shown in FIG. 3, the inner opening portion 21 has a cylindrical shape having a smaller diameter than the outer opening portion 11, and is arranged concentrically with the outer opening portion 11 inside the outer opening portion 11. A gap 23 at a predetermined interval is provided between the inner peripheral surface of the outer opening portion 11 and the outer peripheral surface of the inner opening portion 21. The enlarged diameter portion 24 is integrally provided at the upper end of the inner opening portion 21, and the outer peripheral surface of the enlarged diameter portion 24 abuts on the inner peripheral surface of the outer opening portion 11 over the entire circumference. The gap 23 between the mouth portion 11 and the inner mouth portion 21 is closed to the outside at the upper end portion of the outer mouth portion 11 or the inner mouth portion 21. A flange portion 25 extending outward in the radial direction is integrally provided at the upper end of the enlarged diameter portion 24, and the flange portion 25 abuts on the upper end of the outer opening portion 11 so that the inner opening portion 21 has a reference to the outer opening portion 11. Is positioned in the axial direction.

The inner opening portion 21 is not limited to a cylindrical shape, and may be a tubular shape. For example, when the outer opening portion 11 is formed into a square tubular shape or an elliptical tubular shape, the square tubular shape or the elliptical shape is similarly formed. It can be formed in a tubular shape.

In the present embodiment, the inner mouth portion 21, the enlarged diameter portion 24, the flange portion 25, and the outer mouth portion 11 constitute the mouth portion 40 of the laminated peeling container 1.

As shown in FIG. 1, the accommodating portion 22 is formed in a bag shape thinner than the body portion 12, and is integrally connected to the lower end of the inner opening portion 21 and is releasably laminated on the inner surface of the body portion 12. The inside of the accommodating portion 22 is an accommodating space S for the content liquid, and the content liquid can be filled in the accommodating portion 22 through the inner mouth portion 21 and the content liquid is accommodated in the accommodating portion 22 through the inner mouth portion 21. Can be poured out. The accommodating portion 22 can be deformed (deformed so as to reduce the internal volume) while being peeled from the inner surface of the body portion 12 as the content liquid is poured out. After the content liquid is poured out by the squeeze of the body portion 12, the outside air is introduced between the outer layer body 10 and the inner layer body 20 from the outside air introduction port 13, so that the accommodating portion 22 maintains the volume reduction deformation while maintaining the volume reduction deformation. It can be easily peeled off from the inner surface of the body portion 12 to restore the body portion 12b to its original shape.

As shown in FIG. 3, a vertical rib 26 is integrally provided on the outer surface of the inner layer 20 in order to secure an air passage for the outside air from the outside air introduction port 13 to the body portion 12 and the accommodating portion 22. ing. Although details are not shown, in the laminated peeling container 1 according to the present embodiment, three vertical ribs 26 are formed on the outer surface of the inner layer 20 in a predetermined range in the circumferential direction centered on one of the outside air introduction ports 13. In addition to being provided side by side at intervals in the direction, three vertical ribs 26 are provided side by side at intervals in the circumferential direction in a predetermined range in the circumferential direction centered on the other outside air introduction port 13. At least one of these vertical ribs 26 faces each outside air inlet 13. Each of the vertical ribs 26 protrudes radially outward from the outer surface of the inner layer body 20 and extends from the inner opening portion 21 across the accommodating portion 22 in the direction along the axis O, and the outer layer body 10 and the inner layer body 20 Between them, an outside air ventilation path is formed which extends from the outside air introduction port 13 beyond the neck ring 14 to the portion between the shoulder portion 12a and the accommodating portion 22. As a result, the ventilation path of the outside air introduced from the outside air introduction port 13 can be surely introduced into the space between the shoulder portion 12a and the accommodating portion 22.

The vertical rib 26 may be provided on the inner peripheral surface of the outer opening portion 11. Further, the vertical rib 26 may not be provided on either the outer opening portion 11 or the inner opening portion 21.

Both the outer layer 10 and the inner layer 20 are made of polyethylene terephthalate resin (PET). By making the outer layer 10 and the inner layer 20 each made of polyethylene terephthalate resin, the laminated stripping container 1 can be made a lightweight and highly transparent container.

The laminated peeling container 1 having the above configuration can be formed, for example, by blow molding a preform assembly made of synthetic resin. As the blow molding, for example, biaxial stretching blow molding can be adopted. Although not shown, the preform assembly incorporates an inner preform made of synthetic resin for forming the inner layer 20 inside the outer preform made of synthetic resin for forming the outer layer 10. It can be a heavy structure. The outer preform can be formed into a predetermined shape corresponding to the outer layer 10 by injection molding the same synthetic resin material as the outer layer 10 using a mold. The inner preform can be formed into a predetermined shape corresponding to the inner layer 20 by injection molding the same synthetic resin material as the inner layer 20 using a mold.

The laminated peeling container 1 of the present embodiment having such a configuration can be configured as a squeeze container by attaching a pouring cap to the outer port portion 11. In this case, the ejection caps include, for example, a check valve for outside air that allows the introduction of outside air into the outside air introduction port 13 and prevents the outflow of outside air from the outside air introduction port 13 to the outside, and an inner port portion 21. It is possible to use a configuration provided with a check valve for the content liquid, which allows the content liquid to be discharged to the outside through the container and prevents the backflow of the outside air to the inside of the storage unit 22.

In the laminated peeling container 1 configured as a squeeze container, when the body body portion 12b of the outer layer body 10 is squeezed (squeezed), the capacity of the accommodating portion 22 is reduced and deformed, and the content liquid is pushed out from the pouring cap to the outside. Be poured out. When the squeeze of the body body 12b is released after the content liquid is poured out, the body body 12b tries to restore its original shape. At this time, the outer layer 10 and the inner layer are formed from the outside air introduction port 13. While the outside air is introduced between the inner layer 20 and the inner layer 20, the accommodating portion 22 is separated from the inner surface of the body portion 12, so that only the body portion 12b is restored to its original shape while the accommodating portion 22 is reduced in volume and deformed. .. As a result, the content liquid contained in the storage unit 22 can be poured out without being replaced with the outside air, the contact of the outside air with the content liquid contained in the storage unit 22 can be reduced, and deterioration and deterioration thereof can be suppressed. can.

Here, in the laminated peeling container 1 according to the present embodiment, as described above, the body portion 12b is formed by the convex ribs 30 and the concave ribs 31 having a predetermined structure and dimensions, so that the body portion 12 is well restored. Sex can be ensured. In particular, like the laminated peeling container 1 according to the present embodiment, the body portion 12 is formed in a bottle shape including a shoulder portion 12a, a body portion 12b, a body portion 12c, and a bottom portion 12d, and the outside air introduction port 13 is outside. In the case of a through hole penetrating the mouth portion 11, the airway becomes narrower at the shoulder portion 12a where the content liquid contained in the storage portion 22 is pressed by its own weight when the content liquid is poured out, and the air passage is narrowed from the outside air introduction port 13 to the trunk. Since it is difficult for outside air to be supplied to the main body 12b, it is important to secure the rigidity of the body 12b in order to secure the resilience of the body 12 and exert the function as the laminated peeling container 1. According to the laminated peeling container 1 according to the present embodiment, by improving the rigidity of the body portion 12b, it is possible to smoothly supply the outside air to the shoulder portion 12a and to ensure the good resilience of the body portion 12. Can be done.

It goes without saying that the above-described embodiment is merely an example of the embodiment of the present invention and can be variously modified without departing from the gist of the invention.

For example, in the above embodiment, the body portion 12 has a shoulder portion 12a, a body portion 12b, a body portion 12c, and a bottom portion 12d, but the body portion 12b is not provided at the lower end of the body portion 12b. The bottom 12d may be connected in a row. Further, the shapes of the shoulder portion 12a and the lower body portion 12c can be changed as appropriate. Further, the outer opening portion 11 may be configured not to include the neck ring 14.

Further, in the above-described embodiment, the outer port portion 11 is provided with a pair of outside air introduction ports 13, but at least one outside air introduction port 13 may be provided. Further, the outside air introduction port 13 is provided in the outer port portion 11 and is a through hole that penetrates the outer port portion 11, but is not limited to this, for example, the upper end of the outer port portion 11 and the inner mouth portion 21. It may be configured as a gap provided between the upper end and an opening to the outside. That is, the outside air introduction port 13 may be provided in the mouth portion 40 composed of the outer mouth portion 11 and the inner mouth portion 21. Alternatively, the outside air introduction port 13 may be provided on the shoulder portion 12a, the lower body portion 12c or the bottom portion 12d.

Further, the material of the outer layer 10 is not limited to the polyethylene terephthalate resin, and for example, polyester resin, polyolefin resin, nylon resin, polycarbonate resin (PC resin), cycloolefin copolymer resin (COC resin), cycloolefin polymer resin (COP resin). ) And other synthetic resin materials can also be adopted.

Further, the material of the inner layer 20 is not limited to the polyethylene terephthalate resin, and for example, polyester resin, polyolefin resin, nylon resin, polycarbonate resin (PC resin), cycloolefin copolymer resin (COC resin), cycloolefin polymer resin (COP resin). ), Other synthetic resin materials such as ethylene-vinyl alcohol copolymer resin (EVOH resin) can also be adopted. When an ethylene-vinyl alcohol copolymer resin is used as the material of the inner layer 20, an ethylene-vinyl alcohol copolymer resin 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.

In the above embodiment, blow molding from a preform assembly is adopted, but other blow molding methods such as EBM molding (Extrusion Blow Molding) may be used.

1 Laminated peeling container 10 Outer layer 11 Outer port 11a Male screw 12 Body 12a Shoulder 12b Body body 12c Lower body 12d Bottom 13 Outside air inlet 14 Neck ring 15 Horizontal rib 16 Grounding 17 Shoulder rib 20 Inner layer 21 Inner Part 22 Accommodating part 23 Gap 24 Enlarged part 25 Flange part 26 Vertical rib 30 Convex rib 30a R part 31 Concave rib 31a Inverted R part 32 Constricted part 40 Mouth part O Axis center R1, R2 Curvature radius W Reduced diameter width S Accommodating space

Claims (9)

A laminated peeling container made of synthetic resin formed by blow molding.
An outer layer body having a tubular outer mouth portion and a bottomed tubular body portion connected to the outer mouth portion, and
An inner layer body having a tubular inner mouth portion arranged inside the outer mouth portion and a volume-reducing and deformable accommodating portion removably laminated on the inner surface of the body portion.
An outside air introduction port for introducing outside air between the outer layer body and the inner layer body is provided.
The body portion has a substantially cylindrical body portion formed by convex ribs and concave ribs arranged alternately over the entire circumference.
The outer peripheral surface of the body portion has an arc-shaped R portion having a radius of curvature of 1 mm to 6 mm formed on the outer surface of the convex rib and a 1 mm to 6 mm formed on the outer surface of the concave rib in the cross section. The inverted R portion forming an arc shape having a radius of curvature of is smoothly connected alternately over the entire circumference, and the convex rib and the concave rib are smoothly connected by an arc having a predetermined radius of curvature. It is formed by being done,
The diameter of the outer peripheral surface of the body portion is 50 mm to 80 mm.
Laminated peeling container. The laminated peeling container according to claim 1, wherein the radius of curvature of the R portion and the radius of curvature of the inverted R portion are substantially the same as each other. The laminated peeling container according to claim 1 or 2, wherein the convex rib and the concave rib extend in parallel with the axial direction of the body body, respectively. The body portion has a constricted portion whose diameter is gradually reduced toward the axial intermediate portion of the body portion.
The laminated stripping container according to any one of claims 1 to 3, wherein the contracted diameter width of the constricted portion is 2 mm or less. The laminated stripping container according to any one of claims 1 to 4, wherein the outside air introduction port is provided in a mouth portion composed of the outer mouth portion and the inner mouth portion. The laminated peeling container according to claim 5, wherein the outside air introduction port is a through hole that penetrates the outer port portion in the radial direction. The body portion includes a shoulder portion that is connected to the outer opening portion and gradually expands in diameter downward, the body portion that is connected below the shoulder portion, and a ground contact portion that is connected below the body portion. The laminated stripping container according to any one of claims 1 to 6, further comprising a bottom having a bottom. The laminated peeling container according to any one of claims 1 to 7, which is formed by blow molding a preform assembly having an outer preform and an inner preform incorporated inside the outer preform. The laminated stripping container according to any one of claims 1 to 8, wherein the outer layer body and the inner layer body are each made of polyethylene terephthalate resin.

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