JP2022086878A - Delamination container - Google Patents

Abstract

To provide a squeeze type delamination container which can enhance discharge operability of contents while preventing occurrence of breakage in a container.SOLUTION: A delamination container 1 has an outer layer body 2, an inner layer body 3 and an outside air introduction port 9, in which the delamination container has a bottle shape having a mouth part 4, a shoulder part 5, a body part 6 and a bottom part 7. A step part 20 having an arc-shaped cross section is provided over the whole circumference between the shoulder part 5 and the body part 6, and a lateral groove 30 is provided over the whole circumference between the step part 20 and the body part 6. Between a deepest part 31 of the lateral groove 30 and the step part 20, a curved surface 32 is formed that has a diameter gradually reduced toward the side of the deepest part 31 of the lateral groove 30 from the side of the step part 20 and is recessed to the inner side of the container, having an arc-shaped cross section. A radius R1 in the cross section of the step part 20 is 5.0-10.0 mm and a radius R2 in the cross section of the curved surface 32 is 30% or more and less than 100% of the radius R1 in the cross section of the step part 20, and is 2.5 mm or more.SELECTED DRAWING: Figure 2

Description

The present invention relates to a laminated stripping container.

As a container for storing food seasonings such as soy sauce or foods such as beverages, cosmetics such as cosmetics, toiletries such as shampoo, rinse or liquid soap as contents, it can be peeled off to the outer layer and the inner surface of the outer layer. There is known a laminated stripping container provided with a volume-reducing and deformable inner layer layer laminated on the surface and an outside air introduction port connected between the outer layer body and the inner layer body. In the laminated stripping container, after the contents are discharged to the outside, the outside air is introduced between the outer layer and the inner layer from the outside air introduction port, and the inner layer can be reduced in volume and deformed according to the discharge of the contents. .. As a result, the contents can be discharged without being replaced with the outside air, the contact of the outside air with the contents stored in the inner layer can be suppressed, and the deterioration and deterioration thereof can be suppressed.

The laminated peeling container has a bottle shape having a tubular mouth part, a shoulder part connected to the mouth part, a body part connected to the shoulder part, and a bottom part connected to the body part, and has flexibility and resilience. There is a squeeze type that can push out the contents stored inside the container from the mouth to the outside by squeezing (pressing) the squeeze area of the body having the above.

As such a squeeze-type laminated peeling container, conventionally, by providing a circumferential step portion between the shoulder portion and the body portion, the flexibility and resilience of the squeeze region are enhanced, and the contents by squeeze play are provided. It is known that the discharge operability is improved (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2019-18892

In the conventional laminated peeling container provided with a circumferential step between the shoulder and the body, depending on the material of the container, etc., in order to ensure the flexibility and resilience of the squeeze area of the body, It is necessary to increase the step in the step.

However, if the step portion of the step portion is increased, the step portion may be broken when the squeeze region of the body portion is squeezed, and it becomes difficult for air to pass through the step portion. As a result, the durability of the container is lowered, and after the contents are discharged, the inner layer becomes difficult to peel off from the outer layer at the stepped portion, and on the contrary, the resilience to the original shape of the squeeze region is lowered, and the contents are lowered. There may be a problem that the discharge operability of the object is deteriorated.

On the other hand, if the step portion of the step portion has a small shape, the resilience of the squeeze region cannot be sufficiently improved, the discharge operability of the contents cannot be maintained, and the squeeze region is broken. It may occur.

The present invention has been made in view of such a problem, and an object thereof is a squeeze type laminated stripping container capable of improving the discharge operability of contents while preventing the container from being broken. Is to provide.

The laminated peeling container of the present invention has an outer layer body, a volume-reducing and deformable inner layer body that is detachably laminated on the inner surface of the outer layer body, and an outside air introduction port connected between the outer layer body and the inner layer body. A laminated peeling container provided with a bottle shape having a tubular mouth portion, a shoulder portion connected to the mouth portion, a body portion connected to the shoulder portion, and a bottom portion connected to the body portion. Between the shoulder and the body, there is a stepped portion with an arcuate cross section that gradually reduces in diameter from the shoulder side to the body side and is convex toward the outside of the container. In addition to being provided over the entire circumference, a lateral groove is provided between the stepped portion and the body portion so as to be concave inward in the radial direction with respect to the outer peripheral surface at the upper end of the body portion. The space between the step portion and the step portion is a curved surface having an arcuate cross section that gradually shrinks in diameter from the step portion side toward the deepest side of the lateral groove and is recessed toward the inside of the container. The radius in the cross section of the step portion is 5.0 to 10.0 mm, and the diameter in the cross section of the curved surface is 30% or more, less than 100%, and 2.5 mm or more of the radius in the cross section of the step portion. It is characterized by that.

In the above-mentioned configuration, the laminated peeling container of the present invention has a thickness of 0.03 to 0.06 mm in the range of at least 15 mm from the deepest portion of the lateral groove toward the mouth portion of the inner layer body. preferable.

In the above configuration, the laminated peeling container of the present invention gradually reduces the diameter from the bottom side to the body side between the bottom and the body, and is convex toward the outside of the container. A sub-step portion having an arcuate cross-section is provided over the entire circumference, and a sub-step portion is recessed inward in the radial direction with respect to the outer peripheral surface at the lower end of the body portion between the sub-step portion and the body portion. A lateral groove is provided over the entire circumference, and the diameter between the deepest portion of the sub-lateral groove and the sub-step portion is gradually reduced from the side of the sub-step portion toward the side of the deepest portion of the sub-lateral groove. It is a sub-curved surface with an arc-shaped cross section that dents inward toward the inside of the container, and the radius in the cross section of the sub-stepped portion is 5.0 to 10.0 mm, and the radius in the cross section of the sub-curved surface is the said. It is preferably 30% or more, less than 100%, and 2.5 mm or more of the radius in the cross section of the sub-step portion.

In the above-mentioned configuration, the laminated peeling container of the present invention has a thickness of 0.03 to 0.06 mm in the range of at least 15 mm from the deepest part of the sub-horizontal groove toward the bottom side of the inner layer. preferable.

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

According to the present invention, it is possible to provide a squeeze type laminated stripping container capable of improving the discharge operability of contents while preventing the container from being broken.

It is a front view which cut out a part of the laminated peeling container which is one Embodiment of this invention. It is sectional drawing which follows the AA line in FIG. It is sectional drawing which follows the line BB in FIG.

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

In the present specification and claims, the vertical direction means the vertical direction (the direction in which the axis O extends) when the laminated peeling container 1 is in an upright position, as shown in FIG. The direction is assumed to mean a direction that passes through the axis O of the laminated peeling container 1 and is perpendicular to the axis O.

The laminated peeling container 1 shown in FIG. 1 stores, for example, food seasonings such as soy sauce or foods such as beverages, cosmetics such as lotion, and various contents such as toiletries such as shampoo, conditioner or liquid soap. It is a squeeze type that can be used for various purposes, and has a double structure having an outer layer body 2 and an inner layer body 3.

The outer layer 2 constitutes the outer shell of the laminated peeling container 1 and is made of polyethylene terephthalate (PET). The outer layer 2 is not limited to a single-layer structure, and can have a multi-layer structure for improving barrier properties and the like if it is composed of polyethylene terephthalate as a main material.

The inner layer 3 is also made of polyethylene terephthalate (PET). The inner layer 3 is formed in a bag shape having a thickness thinner than that of the outer layer 2, and is releasably laminated on the inner surface of the outer layer 2. The peeling of the inner layer 3 with respect to the inner surface of the outer layer 2 may be any of peeling from the bonded state, peeling from the pseudo-bonded state in the case of an incompatible resin laminate, and separation from the close contact state. The inside of the inner layer 3 is a storage space S connected to the opening of the mouth portion 4, which will be described later, and the contents can be stored in the storage space S. As the contents are poured out from the storage space S, the inner layer 3 is deformable so as to reduce its inner volume while being peeled from the inner surface of the outer layer 2. The inner layer 3 is not limited to a single-layer structure, and if it is composed of polyethylene terephthalate as a main material, it can have a multi-layer structure for improving barrier properties and the like.

In the present embodiment, the laminated stripping container 1 is made of polyethylene terephthalate in which both the outer layer body 2 and the inner layer body 3 are made of polyethylene terephthalate that can be biaxially stretchable. Examples of such polyethylene terephthalate include homo-PET and the like, but other PET such as IPA (isophthalic acid) -modified PET or CHDM-modified PET can be used. The polyethylene terephthalate constituting the outer layer 2 and the polyethylene terephthalate constituting the inner layer 3 may have the same configuration or different configurations.

Since the outer layer 2 and the inner layer 3 are made of polyethylene terephthalate, the laminated stripping container 1 can be made a lightweight, high-strength, and highly transparent container.

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

The laminated peeling container 1 has a bottle shape having a mouth portion 4, a shoulder portion 5 connected to the lower end of the mouth portion 4, a body portion 6 connected to the lower end of the shoulder portion 5, and a bottom portion 7 connected to the lower end of the body portion 6. It has become.

The mouth portion 4 has a substantially cylindrical shape centered on the axis O, and a male screw 4a for mounting a member such as a pouring cap is integrally provided on the outer peripheral surface thereof. Further, a neck ring 8 is integrally provided below the male screw 4a of the mouth portion 4.

Instead of the male screw 4a, the outer peripheral surface of the mouth portion 4 may be provided with a protrusion for undercut engagement of a member such as a pouring cap by tapping. Further, the neck ring 8 may not be provided.

The mouth portion 4 is provided with an outside air introduction port 9. In the embodiment, the outside air introduction port 9 is provided as a through hole that penetrates the outer layer body 2 in the radial direction in a portion constituting the mouth portion 4 of the outer layer body 2. The outside air introduction port 9 is connected between the outer layer 2 and the inner layer 3, and as the inner layer 3 is separated from the outer layer 2, the outside air is introduced between the outer layer 2 and the inner layer 3. can do.

The shoulder portion 5 has a shape in which the diameter gradually increases downward. In the present embodiment, the shoulder portion 5 has a dome shape that is convex toward the outside of the container, and the cross-sectional shape perpendicular to the axis O thereof is substantially circular.

On the shoulder portion 5, a plurality of (18) concave ribs 10 (for convenience, only one concave rib is designated with a reference numeral in FIG. 1) are arranged at equal intervals in the circumferential direction at equal intervals in the circumferential direction. They are installed side by side. Each of these concave ribs 10 has a groove shape that is recessed toward the inside of the container and extends in the vertical direction. By providing a plurality of concave ribs 10 on the shoulder portion 5, the passage of outside air between the outer layer body 2 and the inner layer body 3 from the outside air introduction port 9 provided in the mouth portion 4 toward the body portion 6. Can be easily formed so that the inner layer 3 can be easily separated from the outer layer 2.

The shape of the shoulder portion 5 can be variously changed as long as the diameter of the shoulder portion 5 gradually increases downward. Further, the shoulder portion 5 may be configured so that the concave rib 10 is not provided.

The body portion 6 has a cylindrical shape, and by squeezing (pressing) the body portion 6 toward the inside of the container, the contents stored in the storage space S are pushed out from the mouth portion 4 and discharged. be able to. The body portion 6 has flexibility and can be elastically deformed inward in the radial direction (inside the container) by being squeezed (pressed) inward in the radial direction. Further, the body portion 6 has resilience, and when the squeeze is released, the deformed state can be restored to the original shape. The body portion 6 is not provided with a circumferential rib.

The outer diameter of the upper end of the body 6 is smaller than the outer diameter of the lower end of the shoulder 5, and the distance between the upper end of the body 6 and the lower end of the shoulder 5 is centered on the axis O over the entire circumference. It is a stepped portion 20. That is, a step portion 20 is provided between the shoulder portion 5 and the body portion 6 over the entire circumference, and the upper end of the body portion 6 is connected to the lower end of the shoulder portion 5 via the step portion 20. As shown in FIG. 2, the step portion 20 has an arcuate cross-sectional shape (curved shape) in which the diameter is gradually reduced from the side of the shoulder portion 5 toward the side of the body portion 6 and the diameter is convex toward the outside of the container. ing.

Further, between the step portion 20 and the body portion 6, a lateral groove 30 recessed inward in the radial direction with respect to the outer peripheral surface at the upper end of the body portion 6 is provided over the entire circumference. The lateral groove 30 has a groove shape with a semicircular cross section, and the space between the deepest portion 31 recessed inward of the container and the step portion 20 is from the side of the step portion 20 to the side of the deepest portion 31 of the lateral groove 30. The curved surface 32 has an arcuate cross-section that gradually shrinks toward the inside of the container and is recessed toward the inside of the container.

Here, the radius R1 in the cross section (vertical cross section) of the step portion 20 shown in FIG. 2 is within the range of 5.0 to 10.0 mm. In the present embodiment, the radius R1 in the cross section of the step portion 20 is 6.5 mm. The radius R1 is the radius of the stepped portion 20 on the outer peripheral surface of the outer layer body 2.

Further, the radius R2 in the cross section (longitudinal cross section) of the curved surface 32 between the deepest portion 31 of the lateral groove 30 and the stepped portion 20 in FIG. 2 is 30% or more and less than 100% of the radius R1 in the cross section of the stepped portion 20. And it is within the range of 2.5 mm or more. In the present embodiment, the radius R2 in the cross section of the curved surface 32 is 3.0 mm. The radius R2 is the radius of the curved surface 32 on the outer peripheral surface of the outer layer body 2.

As described above, in the laminated peeling container 1 of the present embodiment, the stepped portion 20 and the lateral groove 30 having the above-mentioned shape are provided between the shoulder portion 5 and the body portion 6, so that the stepped portion 20 has high rigidity. It is possible to suppress the stepped portion 20 from being deformed together with the body portion 6 when the body portion 6 is squeezed, thereby improving the resilience of the body portion 6 and improving the discharge operability of the laminated peeling container 1. ..

Further, in the laminated peeling container 1 of the present embodiment, since the radius R1 in the cross section of the step portion 20 is within the range of 5.0 to 10.0 mm, when the body portion 6 is squeezed, the step portion 20 and the step portion 20 and It is possible to prevent the body portion 6 from being broken. Thereby, the durability of the laminated peeling container 1 can be enhanced. The occurrence of "folding" in the step portion 20 or the body portion 6 means that the step portion 20 or the body portion 6 is plastically deformed so that a broken line-shaped wrinkle remains.

Further, in the laminated peeling container 1 of the present embodiment, the radius R2 in the cross section of the curved surface 32 is set to be within the range of 30% or more, less than 100%, and 2.5 mm or more of the radius R1 in the cross section of the step portion 20. In the stepped portion 20 and the lateral groove 30, air can easily flow between the outer layer body 2 and the inner layer body 3. As a result, the inner layer 3 is formed into an outer layer so that an air passage is easily formed between the outer layer 2 and the inner layer 3 from the outside air introduction port 9 provided in the mouth 4 toward the body 6. It can be easily peeled off from the body 2. Further, by facilitating the peeling of the inner layer 3 from the outer layer 2, the resilience of the body 6 can be further enhanced.

In the laminated peeling container 1 of the present embodiment, the thickness of the inner layer 3 in the range of at least 15 mm (the range in the direction along the axis O) A1 from the deepest portion 31 of the lateral groove 30 toward the side of the mouth portion 4 is set. , It is preferably in the range of 0.03 to 0.06 mm. The range A1 of the inner layer body 3 having a thickness in the range of 0.03 to 0.06 mm is not limited to the range of 15 mm from the deepest portion 31 of the lateral groove 30 toward the side of the mouth portion 4, and the deepest portion of the lateral groove 30. The range may be 15 mm or more from 31 toward the side of the mouth 4. The range A1 preferably includes the entire area of the step portion 20.

By setting the thickness of the inner layer 3 in the range A1 to the range of 0.03 to 0.06 mm, the air flowing from the side of the shoulder portion 5 toward the side of the body portion 6 is the step of the step portion 20. The resistance received from the shape and the thickness of the inner layer 3 can be reduced. As a result, the inner layer 3 is formed so that the passage of air flowing from the outside air introduction port 9 provided in the mouth 4 toward the body 6 is more easily formed between the outer layer 2 and the inner layer 3. It can be made easier to peel off from the outer layer 2. Further, by making the inner layer 3 easier to peel off from the outer layer 2, the resilience of the body 6 can be further enhanced.

Further, in the laminated peeling container 1 of the present embodiment, as shown in FIG. 2, the radial dimension B of the step between the lower end of the shoulder portion 5 and the upper end of the body portion 6 is 1.5 to 3.0 mm. It is preferably within the range of.

The bottom portion 7 has a bottomed cylindrical shape having a diameter larger than that of the body portion 6, and closes the lower end of the body portion 6. Two annular concave ribs 7a extending in the circumferential direction are provided on the outer peripheral surface of the bottom portion 7. Since the bottom portion 7 is provided with the two annular concave ribs 7a, the rigidity in the radial direction is higher than that of the body portion 6. Further, the bottom portion 7 has an annular ground contact portion 7b centered on the axis O and a concave bottom panel 7c located inside the ground contact portion 7b.

The outer diameter of the upper end of the bottom portion 7 is larger than the outer diameter of the lower end of the body portion 6, and the sub-step portion 40 centered on the axis O covers the entire circumference between the body portion 6 and the bottom portion 7. It has become. That is, a sub step portion 40 is provided between the bottom portion 7 and the body portion 6 over the entire circumference, and the upper end of the bottom portion 7 is connected to the lower end of the body portion 6 via the sub step portion 40. As shown in FIG. 3, the sub-step portion 40 has an arcuate cross-sectional shape (curved shape) in which the diameter is gradually reduced from the side of the bottom portion 7 toward the side of the body portion 6 and the diameter is convex toward the outside of the container. ing.

Further, between the sub-step portion 40 and the body portion 6, a sub-horizontal groove 50 recessed inward in the radial direction with respect to the outer peripheral surface at the lower end of the body portion 6 is provided over the entire circumference. The sub-horizontal groove 50 has a groove shape with a semi-circular cross section, and the deepest portion of the sub-lateral groove 50 is between the deepest portion 51 recessed inward of the container and the sub-step portion 40 from the side of the sub-step portion 40. The sub-curved surface 52 having an arcuate cross section is gradually reduced in diameter toward the side of 51 and is recessed toward the inside of the container.

Here, the radius R3 in the cross section (vertical cross section) shown in FIG. 3 of the sub-stepped portion 40 is within the range of 5.0 to 10.0 mm. In the present embodiment, the radius R3 in the cross section of the sub-stepped portion 40 is 6.5 mm. The radius R3 is the radius of the sub-step portion 40 on the outer peripheral surface of the outer layer body 2.

Further, the radius R4 in the cross section (vertical cross section) shown in FIG. 3 of the sub-curved surface 52 between the deepest portion 51 of the sub-horizontal groove 50 and the sub-step portion 40 is 30% or more of the radius R3 in the cross section of the sub-step portion 40. , Less than 100% and within the range of 2.5 mm or more. In the present embodiment, the radius R4 in the cross section of the sub-curved surface 52 is 3.0 mm. The radius R4 is the radius of the sub-curved surface 52 on the outer peripheral surface of the outer layer body 2.

As described above, in the laminated peeling container 1 of the present embodiment, the sub-step portion 40 and the sub-horizontal groove 50 having the above-mentioned shape are provided between the bottom portion 7 and the body portion 6, so that the sub-step portion 40 has high rigidity. As a matter of fact, when the body portion 6 is squeezed, the sub-step portion 40 is suppressed from being deformed together with the body portion 6, thereby improving the resilience of the body portion 6 and enhancing the discharge operability of the laminated peeling container 1. be able to.

Further, in the laminated peeling container 1 of the present embodiment, since the radius R3 in the cross section of the sub-step portion 40 is within the range of 5.0 to 10.0 mm, the sub-step portion is formed when the body portion 6 is squeezed. It is possible to prevent the 40 and the body 6 from being broken. Thereby, the durability of the laminated peeling container 1 can be enhanced.

Further, in the laminated peeling container 1 of the present embodiment, the radius R4 in the cross section of the sub-curved surface 52 is within a range of 30% or more, less than 100%, and 2.5 mm or more of the radius R3 in the cross section of the sub step portion 40. Therefore, it is possible to facilitate the flow of air between the outer layer body 2 and the inner layer body 3 in the sub-step portion 40 and the sub-horizontal groove 50 portion. As a result, an air passage is easily formed between the outer layer 2 and the inner layer 3 from the outside air introduction port 9 provided in the mouth 4 toward the bottom 7 via the body 6. The inner layer 3 can be easily separated from the outer layer 2. Further, by facilitating the peeling of the inner layer 3 from the outer layer 2, the resilience of the body 6 can be further enhanced.

In the laminated stripping container 1 of the present embodiment, the thickness of the inner layer 3 in the range of at least 15 mm (the range in the direction along the axis O) A2 from the deepest portion 51 of the sub-horizontal groove 50 toward the bottom portion 7 is set. , It is preferably in the range of 0.03 to 0.06 mm. The range A2 of the inner layer 3 having a thickness in the range of 0.03 to 0.06 mm is not limited to the range of 15 mm from the deepest portion 51 of the sub-horizontal groove 50 toward the bottom 7 side, but is the deepest of the sub-lateral groove 50. The range may be 15 mm or more from the portion 51 toward the bottom portion 7. The range A2 preferably includes the entire area of the sub-step portion 40.

By setting the thickness of the inner layer 3 in the range A2 to the range of 0.03 to 0.06 mm, the air flowing from the body 6 side to the bottom 7 side is the step of the sub step portion 40. The resistance received from the shape and the thickness of the inner layer 3 can be reduced. As a result, a passage for air flowing from the outside air introduction port 9 provided in the mouth portion 4 toward the bottom portion 7 via the body portion 6 is more easily formed between the outer layer body 2 and the inner layer body 3. , The inner layer 3 can be more easily separated from the outer layer 2. Further, by making the inner layer 3 easier to peel off from the outer layer 2, the resilience of the body 6 can be further enhanced.

The laminated peeling container 1 having the above configuration is preferably a blow molded product.

When the laminated release container 1 is used as a blow molded product, for example, an outer body formed by injection molding polyethylene terephthalate and an inner body formed by injection molding polyethylene terephthalate separately from the outer body are combined. The laminated peeling container 1 can be formed by biaxially stretching blow molding a preform having a double structure. In this case, the outer body corresponds to the outer layer body 2, and the inner body corresponds to the inner layer body 3.

The laminated peeling container 1 is 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. You can also do it.

Further, in the laminated stripping container 1, a cylindrical laminated parison 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 is blow-molded using a split mold. It can also be formed by extrusion blow molding (EBM).

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist thereof.

For example, in the above-described embodiment, the mouth portion 4, the shoulder portion 5, the body portion 6, and the bottom portion 7 each have a shape having a circular cross section perpendicular to the axis O, but the present invention is not limited to this, for example. The cross section may have another shape such as a polygon or an ellipse.

Further, in the above-described embodiment, the outside air introduction port 9 is provided in the portion constituting the mouth portion 4 of the outer layer body 2 as a through hole penetrating the portion in the radial direction, but the present invention is not limited to this. If it is configured so that outside air can be introduced between the outer layer 2 and the inner layer 3, it may be provided in any part of the shoulder 5, the body 6 and the bottom 7. The form is not limited to the through hole, and may be a slit shape or a gap shape that opens at the boundary between the outer layer body 2 and the inner layer body 3.

Further, in the above-described embodiment, the sub-step portion 40 and the sub-horizontal groove 50 are provided between the body portion 6 and the bottom portion 7, but a configuration in which these are not provided may be provided.

1 Laminated peeling container 2 Outer layer 3 Inner layer 4 Mouth 4a Male screw 5 Shoulder 6 Body 7 Bottom 7a Circular concave rib 7b Grounding 7c Bottom panel 8 Neck ring 9 Outside air introduction port 10 Concave rib 20 Step 30 Horizontal groove 31 Deepest Part 32 Curved surface 40 Sub-stepped portion 50 Sub-horizontal groove 51 Deepest part 52 Sub-curved surface O Axis line S Storage space R1 Stepped portion radius R2 Curved surface radius R3 Sub-stepped surface 20 radius R4 Sub-curved surface radius A1 Range A2 Range

Claims (5)

A laminated peeling container provided with an outer layer, a volume-reducing deformable inner layer that is detachably laminated on the inner surface of the outer layer, and an outside air introduction port that is connected between the outer layer and the inner layer. ,
It is a bottle shape having a tubular mouth portion, a shoulder portion connected to the mouth portion, a body portion connected to the shoulder portion, and a bottom portion connected to the body portion.
Between the shoulder and the body, there is a stepped portion with an arcuate cross section that gradually reduces in diameter from the shoulder side to the body side and is convex toward the outside of the container. In addition to being provided over the entire circumference, a lateral groove recessed inward in the radial direction with respect to the outer peripheral surface at the upper end of the body portion is provided between the step portion and the body portion.
Between the deepest portion of the lateral groove and the stepped portion, a curved surface having an arcuate cross section that gradually reduces in diameter from the side of the stepped portion toward the deepest portion of the lateral groove and is recessed toward the inside of the container. It has become
The radius in the cross section of the step portion is 5.0 to 10.0 mm, and the radius is 5.0 to 10.0 mm.
A laminated stripping container characterized in that the radius in the cross section of the curved surface is 30% or more, less than 100%, and 2.5 mm or more of the radius in the cross section of the stepped portion. The laminated stripping container according to claim 1, wherein the inner layer has a thickness of 0.03 to 0.06 mm in a range of at least 15 mm from the deepest portion of the lateral groove toward the mouth portion. Between the bottom and the body, a sub-step portion having an arcuate cross section that gradually reduces in diameter from the bottom side toward the body side and is convex toward the outside of the container is formed all around. In addition to being provided over the entire circumference, a sub-horizontal groove recessed inward in the radial direction with respect to the outer peripheral surface at the lower end of the body portion is provided between the sub-step portion and the body portion.
Between the deepest part of the sub-horizontal groove and the sub-step portion, the diameter is gradually reduced from the side of the sub-step portion toward the deepest side of the sub-horizontal groove, and the cross-sectional arc shape is recessed toward the inside of the container. It is a sub-curved surface of
The radius in the cross section of the sub-step portion is 5.0 to 10.0 mm, and the radius is 5.0 to 10.0 mm.
The laminated stripping container according to claim 1 or 2, wherein the radius in the cross section of the sub-curved surface is 30% or more, less than 100%, and 2.5 mm or more of the radius in the cross section of the sub-stepped portion. The laminated stripping container according to claim 3, wherein the inner layer has a thickness of 0.03 to 0.06 mm in a range of at least 15 mm from the deepest part of the sub-lateral groove toward the bottom side. The laminated stripping container according to any one of claims 1 to 4, wherein the outer layer body and the inner layer body are made of polyethylene terephthalate.

Images