JP7330632B2 - delaminating container - Google Patents

Description

The present invention relates to delamination containers.

As a container for storing food seasonings such as soy sauce, beverages, cosmetics, shampoos, rinses, liquid soaps, etc. as contents, an outer layer made of polyethylene terephthalate resin having a mouth, a body and a bottom, and an inner side of the outer layer and an inner layer body made of polyethylene terephthalate resin disposed in the outer layer body, and an outside air introduction port communicating between the outer layer body and the inner layer body, and at least a part of the inner layer body is connected to the outer layer body. A delamination container having a configuration in which layers are laminated in a detachable manner is known (see, for example, Patent Document 1).

The delamination container, also called a delamination container, is used, for example, as a squeeze-type pouring container combined with a pouring cap with a check valve, or as a pump-equipped container combined with a pump. The contents can be poured out by squeezing the part or operating the pump. On the other hand, after the contents have been poured out, outside air is introduced between the outer layer body and the inner layer body through the outside air inlet, thereby restoring or maintaining the original shape of the outer layer body and at least partly reducing the inner layer body. The part can be peeled off from the outer layer body to be reduced in volume and deformed. Therefore, according to the delamination container, the contents contained in the inner layer body are discharged to the outside without being replaced with the outside air, thereby reducing the contact of the contents contained in the inner layer body with the outside air. It is possible to suppress deterioration, alteration, etc. of the contents.

JP 2019-177908 A

In the lamination peeling container having the above configuration, the bottom has a ring-shaped grounding portion and a raised bottom portion that is integrally connected to the inside of the grounding portion and recessed toward the mouth portion in consideration of heat resistance, peeling behavior, etc. It is common to set it as the structure provided. A delaminating container having such a bottom portion is molded by blow molding using a three-part blow molding mold having a bottom mold for molding the bottom portion in addition to the left and right split molds.

However, in the above-described conventional delaminating container, the surface of the raised bottom portion of the bottom has many smooth portions without irregularities, so that the surface of the raised bottom portion adheres closely to the inner surface of the bottom mold after blow molding. After blow molding, when the bottom mold is moved downward and the bottom part is separated from the bottom mold, the raised bottom part is peeled off from the bottom mold and an impact is generated. There was a problem that there was a possibility that

If the inner layer is separated from the outer layer at the raised bottom portion, the portion of the inner layer corresponding to the raised bottom portion moves toward the mouth portion as the contents are poured out during use, and the height of the trunk portion increases. The inner surfaces of the inner layers may come into contact with each other near the center in the width direction, which may narrow or close the flow path of the contents, making it difficult to pour out the contents to the end. There is

An object of the present invention is to solve such problems, and an object thereof is to provide a delamination container capable of suppressing peeling of the inner layer from the outer layer at the raised bottom portion. It is in.

The delaminating container of the present invention has an outer layer body having a mouth, a body, and a bottom closing a lower end of the body, and an inner layer body disposed inside the outer layer body, wherein the outer layer body and the above-mentioned outer layer body and the above-mentioned outer layer body. A delamination container having an outside air inlet communicating with an inner layer body, wherein at least a part of the inner layer body is detachably laminated to the outer layer body, wherein the bottom portion is an annular ground portion. and a raised bottom portion that is integrally connected to the inner side of the ground contact portion and recessed toward the mouth portion, and the axial center of the raised bottom portion is formed by forming uneven streaks on the outer surface of the raised bottom portion. A plurality of thin ribs arranged radially around the center are provided integrally over the entire circumference.

In the delamination container of the present invention, it is preferable that, in the above configuration, a peel promoting portion is provided between the outer layer body and the inner layer body except for the portion provided with the raised bottom portion.

In the delamination container of the present invention, in the configuration described above, the width of the plurality of thin ribs is preferably 0.5 mm to 1.2 mm.

In the delamination container of the present invention, in the above configuration, the raised bottom portion includes a disk-shaped portion including the axis of the raised bottom portion, and an inclined surface portion provided between the disk-shaped portion and the ground portion. , and the plurality of narrow ribs are preferably provided only on the inclined surface portion.

In the lamination peeling container of the present invention, in the above configuration, it is preferable that a plurality of concave or convex peeling suppressing portions are provided on the inclined surface portion at regular intervals in the circumferential direction.

In the delaminating container of the present invention having the above configuration, it is preferable that all of the plurality of detachment suppressing portions are concave.

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

ADVANTAGE OF THE INVENTION According to this invention, the delamination peeling container which can suppress peeling of an inner-layer body from an outer-layer body in a raised-bottom part can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is the front view which notched the part of the delamination container which concerns on one embodiment of this invention. 2 is a bottom view of the delaminating container shown in FIG. 1; FIG. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2; FIG. 3 is a cross-sectional view taken along line BB in FIG. 2;

Hereinafter, the present invention will be described more specifically by way of example with reference to the drawings.

A delamination container 1 according to one embodiment of the present invention shown in FIG. It has a double structure with

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 delamination container 1 is lightweight and highly transparent.

The delamination container 1 is made by blow molding a laminated preform having an outer preform made of polyethylene terephthalate resin for forming the outer layer body 10 and an inner preform made of polyethylene terephthalate resin positioned inside the outer preform. can be formed by

In the following, a description will be given of a case where the delamination container 1 is used as a squeeze-type pouring container for containing food seasonings and the like as contents.

In this specification, the vertical direction means the vertical direction when the delamination container 1 is in an upright position as shown in FIG. shall mean the direction along a straight line passing through and perpendicular to the axis O.

The outer layer body 10 is a portion that constitutes the outer shell of the delamination container 1, and includes a mouth portion 11, a cylindrical trunk portion 12 that is integrally connected to the lower end of the mouth portion 11, and a bottom portion 13 that closes the lower end of the trunk portion 12. It has a bottle shape with

The mouth portion 11 is cylindrical, and a male thread 11a is integrally provided on the outer peripheral surface thereof. The mouth portion 11 can be fitted with a spout cap (not shown) that is screwed onto the male thread 11a and has a spout.

The mouth portion 11 may be provided with an annular protrusion instead of the male thread 11a, and the pouring cap may be attached by engaging with the protrusion in an undercut shape by plugging. In this case, the mouth portion 11 is not limited to a cylindrical shape, and may be, for example, a square tube shape or an elliptical tube shape as long as it is cylindrical.

An outside air introduction port 14 is provided in the mouth portion 11 . In the present embodiment, the outside air introduction port 14 is an elongated through hole penetrating the mouth portion 11 of the outer layer body 10 in the radial direction and extending in the circumferential direction. The outside air introduction port 14 communicates between the outer layer body 10 and the inner layer body 20 , and can introduce outside air between the outer layer body 10 and the inner layer body 20 . In FIG. 1, only one outside air introduction port 14 is shown, but a pair of outside air introduction ports 14 are provided symmetrically on both sides of the mouth portion 11 with the axis O interposed therebetween.

If the outside air introduction port 14 communicates between the outer layer body 10 and the inner layer body 20 and can introduce the outside air between the outer layer body 10 and the inner layer body 20, for example, the upper end of the mouth portion 11 The configuration, arrangement, and number of the gaps can be changed in various ways, such as opening the gap between the outer layer body 10 and the inner layer body 20 to the outside, or providing the gap in the trunk portion 12 .

A neck ring 15 is integrally provided below the outside air introduction port 14 of the mouth portion 11 . The neck ring 15 extends in an annular shape over the entire circumference of the mouth portion 11 and protrudes radially outward from the outer peripheral surface of the mouth portion 11 .

The trunk portion 12 has a shoulder portion 12a and a trunk body portion 12b.

The shoulder portion 12 a is integrally connected to the lower end of the mouth portion 11 , gradually expands in diameter downward, and protrudes radially outward with respect to the mouth portion 11 .

A plurality (eighteen) of concave ribs 16 extending in the vertical direction are provided on the shoulder portion 12a so as to be arranged at equal intervals along the entire circumferential direction. In FIG. 1, only one concave rib 16 is labeled for convenience. By providing a plurality of recessed ribs 16 on the shoulder portion 12a, the inner layer body 20 can be easily peeled off from the outer layer body 10 at the portion of the shoulder portion 12a between the outside air inlet 14 and the trunk body portion 12b. It should be noted that a configuration in which the recessed rib 16 is not provided is also possible.

The trunk body portion 12b is formed in a tubular shape having a substantially circular cross section, and its upper end is integrally connected to the lower end of the shoulder portion 12a. The trunk body portion 12b has flexibility, and when it is squeezed, it can be elastically deformed and dented radially inward. It can restore itself. By configuring the barrel main body 12b to be elastically deformable by squeezing, when the delamination container 1 is used as a squeeze-type pouring container, the contents can be easily poured out. At the same time, after the contents are poured out, the trunk main body 12b is easily restored to its original shape, so that outside air is reliably introduced between the outer layer body 10 and the inner layer body 20 through the outside air introduction port 14. , the function as the delaminating container 1 can be exhibited reliably.

The bottom portion 13 is integrally connected to the lower end of the trunk body portion 12b and closes the lower end of the trunk body portion 12b.

As shown in FIGS. 1, 2 and 3, the bottom portion 13 includes an annular ground portion 17 and a raised bottom portion 18 which are integrally connected to the inner side of the ground portion 17 and recessed toward the mouth portion 11 side (the inside of the container). and

In the present embodiment, the ground contact portion 17 is annular and constitutes a flat contact surface. That is, by bringing the grounding portion 17 into contact with a horizontal surface, the delamination container 1 can be arranged independently in the upright posture shown in FIG.

The inner layer body 20 is arranged along the inner surface of the outer layer body 10 and is detachably laminated on the outer layer body 10 at least at the trunk portion 12 and the ground portion 17 .

The inner layer body 20 has an inner mouth portion arranged on the inner peripheral side of the mouth portion 11 of the outer layer body 10, and a housing portion connected to the inner mouth portion and arranged inside the trunk portion 12 and the bottom portion 13. there is The inside of the storage part is a storage space S for the contents, and the contents can be filled into the storage part through the inner opening, and the contents stored in the storage part can be discharged to the outside through the inner opening. You can do it.

As the content is poured out, the containing portion can be peeled off from the inner surface of the body portion 12 or the grounding portion 17 and deformed to reduce its volume (deformed so as to reduce the internal volume). Accompanying the volume-reducing deformation of the accommodation portion, outside air is introduced between the outer layer body 10 and the inner layer body 20 from the outside air introduction port 14, so that the trunk body portion 12b can be accommodated while maintaining or restoring its original shape. Only the portion can be easily peeled off from the inner surface of the trunk portion 12, and the volume can be reduced and deformed.

In the delamination container 1 of the present embodiment, the mouth portion of the outer preform and the inner mouth portion of the inner preform, which are formed by injection molding, are not stretched by blow molding and remain in the injection-molded shape. In the delamination container 1 formed by blow-molding a laminated preform having an outer preform and an inner preform, the housing portion for the inner layer body 20 is the mouth portion 11 (inner mouth portion) It is restrained (closely attached) to the outer layer body 10 on both the upper and lower sides of the side and the raised bottom part 18 side, and the body part 12 and the grounding part 17 between them are configured to be peelable from the outer layer body 10. there is

As shown in FIGS. 2 and 3, in the delamination container 1 according to the present embodiment, the raised bottom portion 18 has a plurality of thin ribs 30 radially arranged around the axis O of the raised bottom portion 18 over the entire circumference. are set as one unit.

As shown in FIG. 4, each of the narrow ribs 30 protrudes to have a substantially arcuate cross section, and grooves between adjacent narrow ribs 30 are recessed to have a substantially V-shaped cross section. shape. That is, the portion of the raised bottom portion 18 where the plurality of thin ribs 30 are provided is wavy. 2 and 3, only one thin rib 30 is labeled for convenience. In this embodiment, grooves having a substantially arcuate cross section are provided on the surface of the bottom mold to form the thin ribs 30, so that the cross section is formed between the thin ribs 30 having a substantially arcuate cross section. Although it is configured to have a substantially V-shaped groove, a groove having a substantially V-shaped cross section is provided on the surface of the bottom mold to form thin ribs 30, so that the cross section is substantially V-shaped. A groove may be provided between the thin ribs 30 so that the cross section is substantially arc-shaped.

As described above, in the delamination container 1 according to the present embodiment, the raised bottom portion 18 is integrally provided with a plurality of thin ribs 30 arranged radially around the axis O of the raised bottom portion 18 over the entire circumference. Therefore, after molding this delamination container 1 by blow molding using a three-part blow molding mold equipped with a bottom mold for molding the bottom part 13 in addition to the left and right split molds, the surface of the raised bottom part 18 can be suppressed from adhering to the inner surface of the bottom mold. That is, in order to provide the plurality of thin ribs 30 on the raised bottom portion 18, the inner surface of the bottom mold is provided with a plurality of uneven portions for molding the plurality of thin ribs 30, which are stretched by blow molding. The polyethylene terephthalate resin pressed against the inner surface of the bottom mold cannot completely enter the plurality of uneven portions provided on the inner surface of the bottom mold, and a slight gap is generated between the uneven portions and the inner surface of the bottom mold. It will be. This gap prevents the surface of the raised bottom portion 18 from sticking and sticking to the inner surface of the bottom mold in the delaminated container 1 after molding. Therefore, when the bottom mold is moved downward to release the bottom part 13 from the bottom mold after blow molding, it is possible to suppress the occurrence of impact on the raised bottom part 18 , and the inner layer body 20 is separated from the outer layer body 10 at the raised bottom part 18 . Exfoliation can be suppressed.

In addition, since the portion of the raised bottom portion 18 where the plurality of thin ribs 30 are provided is wavy, the inner layer body 20 is less likely to separate from the outer layer body 10 at this portion.

As described above, in the delamination container 1 according to the present embodiment, the raised bottom portion 18 is integrally provided with a plurality of thin ribs 30 arranged radially around the axis O of the raised bottom portion 18 over the entire circumference. Therefore, peeling of the inner layer body 20 from the outer layer body 10 at the raised bottom portion 18 can be suppressed. Therefore, during use, as the contents are poured out, the inner layer body 20 is regularly reduced in volume and deformed into a flattened shape from the side of the body 12 in the radial direction. It is possible to reduce the residual amount of contents after the container 1 is used.

In the delamination container 1 according to the present embodiment, each of the plurality of thin ribs 30 preferably has a width (width in the direction perpendicular to the extending direction) of 0.5 mm to 1.2 mm. Further, it is preferable that each of the plurality of thin ribs 30 has a depth of 0.05 to 0.30 mm. In this embodiment, each of the plurality of thin ribs 30 has a width of 0.8 mm, a depth of 0.1 mm, and a cross-sectional shape of an arc with a radius of 1.0 mm.

With such a configuration, it is possible to easily create a gap between the polyethylene terephthalate resin pressed against the inner surface of the bottom mold and the inner surface of the uneven part of the bottom mold during blow molding. As a result, in the delaminated container 1 after molding, the surface of the raised bottom portion 18 is more reliably prevented from adhering to the inner surface of the bottom mold. It is possible to more reliably suppress the peeling from.

In the delamination container 1 according to the present embodiment, the raised bottom portion 18 is a disk-shaped portion 18 a including the axis O of the raised bottom portion 18 and the inclined portion provided between the disk-shaped portion 18 a and the grounding portion 17 . , and a plurality of thin ribs 30 are provided only on the inclined surface portion 18b. In this case, each thin rib 30 radially extends between the inner peripheral edge and the outer peripheral edge of the inclined surface portion 18b centering on the axis O of the raised bottom portion 18. As shown in FIG.

A configuration in which a plurality of separation suppressing portions 19 are provided in the raised bottom portion 18 may also be employed. In the present embodiment, five exfoliation suppressing portions 19 are arranged at equal intervals in the circumferential direction on the inclined surface portion 18b. All of the five peeling suppressing portions 19 are recessed toward the inside of the container. Like the outer layer 10 , the inner layer 20 is laminated on the outer layer 10 so as to be recessed at these five peeling suppressing portions 19 . It should be noted that the separation suppressing portion 19 is not limited to have a concave shape, and may have a convex shape.

By providing such a peeling suppressing portion 19 in the raised bottom portion 18 , it is possible to more effectively suppress the peeling of the inner layer body 20 from the outer layer body 10 in the raised bottom portion 18 . As a result, as the contents are poured out, the inner layer body 20 is regularly reduced in volume and deformed so as to be flattened in the radial direction from the side of the body part 12, so that the contents can be poured out. It is possible to reduce the amount of residual substances.

In the delamination container 1 according to the present embodiment, except for the portion where the bottom-raising portion 18 is provided, a detachment-promoting peel-promoting peeling-promoting peeling-promoting peeling-promoting detachment of the inner-layer body 20 from the outer-layer body 10 is provided between the outer-layer body 10 and the inner-layer body 20 . It is also possible to adopt a configuration in which a part is provided. In the present embodiment, the body portion 12 and the contact portion 17 are provided with separation promoting portions.

The peel-promoting portion can be formed, for example, by applying a release agent between the outer layer body 10 and the inner layer body 20 . Here, the release agent is a coating agent that can reduce the peel resistance of the inner layer body 20 from the outer layer body 10 . Silicon oil, for example, can be used as such a release agent, but the release agent is not limited to this.

In addition, the peeling promoting portion, for example, configures at least one of the inner surface of the outer layer body 10 facing the inner layer body 20 and the outer surface of the inner layer body 20 facing the outer layer body 10 as a rough surface having a predetermined roughness. It can also be formed by As a method of forming the rough surface, for example, blasting or the like can be used.

In this way, by providing the separation promoting portion between the outer layer body 10 and the inner layer body 20 excluding the portion where the raised bottom portion 18 is provided, the inner layer body 20 can be easily separated from the outer layer body 10 in the portion other than the raised bottom portion 18. The inner layer body 20 is suppressed from being peeled off from the outer layer body 10 at the raised bottom portion 18 while ensuring the function of the lamination peeling container 1 is exhibited by making it possible to peel off easily, and the residual amount of the contents is reduced. can be reduced.

The delamination 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 pouring cap includes, for example, an outside air check valve that allows outside air to enter the outside air introduction port 14 and prevents the outside air from flowing out from the outside air introduction port 14, and an inner opening. It is possible to use a structure having a contents check valve that allows the contents passed through to flow out to the outside and prevents the outside air from flowing back into the container.

In the delaminating container 1 configured as a squeeze container, when the body portion 12b of the outer layer body 10 is squeezed (squeezed), the containing portion is reduced in volume and deformed, and the contents are pushed out from the pouring cap and poured out. served. After the contents have been poured out, when the squeezing of the barrel main body 12b is released, the barrel main body 12b tries to restore its original shape. 20, the storage portion of the inner layer body 20 is separated from the inner surface of the body portion 12 while the outside air is introduced, so that only the body portion 12b restores its original shape while the storage portion is reduced in volume and deformed. As a result, the contents stored in the storage part can be poured out without being replaced with the outside air, the contact of the contents stored in the storage part with the outside air can be reduced, and deterioration and deterioration of the contents can be suppressed.

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

For example, in the above-described embodiment, the raised bottom portion 18 is provided with the plurality of peeling suppressing portions 19 , but the raised bottom portion 18 may not be provided with the peeling suppressing portions 19 .

Further, the mouth portion 11 may be configured without the neck ring 15, and the shapes of the shoulder portion 12a, the body portion 12b and the bottom portion 13 can be changed in various ways.

Furthermore, in the above-described embodiment, the delamination container 1 is a squeeze-type pouring device in which a pouring cap having a pouring port is attached to the mouth portion 11, and the contents are poured out by squeezing the body portion 12. Although the case of being used for a container has been shown, it is used for a pump-equipped container in which the body portion 12 has a predetermined rigidity that does not easily squeeze deformation and a pump-type pouring tool is attached to the mouth portion 11. can also be

Furthermore, although the outer layer body 10 and the inner layer body 20 are made of polyethylene terephthalate resin in the above embodiment, they may be made of synthetic resin other than polyethylene terephthalate resin.

Furthermore, in the above-described embodiment, the portion of the raised bottom portion 18 provided with the plurality of thin ribs 30 includes the thin ribs 30 having a substantially arcuate cross section and the recessed grooves having a substantially V-shaped cross section. The shape of the rib 30 and the shape of the groove are not limited, for example, the shape of the groove may be substantially arcuate.

1 Delamination container 10 Outer layer body 11 Mouth part 11a Male thread 12 Body part 12a Shoulder part 12b Body body part 13 Bottom part 14 Outside air inlet 15 Neck ring 16 Concave rib 17 Grounding part 18 Raised bottom part 18a Disc-shaped part 18b Inclined surface part 19 Peeling Suppressing portion 20 Inner layer body 30 Narrow rib O Axis

Claims (7)

It has an outer layer body having a mouth portion, a body portion, and a bottom portion that closes the lower end of the body portion, and an inner layer body disposed inside the outer layer body, and communicates between the outer layer body and the inner layer body. A delaminating container including an outside air inlet and at least a portion of the inner layer body being detachably laminated on the outer layer body,
the bottom portion
an annular grounding portion;
a raised bottom part integrally connected to the inside of the ground part and recessed toward the mouth part,
A lamination characterized in that a plurality of thin ribs radially arranged around the axis of the raised bottom portion are integrally provided over the entire circumference by forming uneven stripes on the outer surface of the raised bottom portion. exfoliation container. 2. The lamination-peeling container according to claim 1, wherein a peel-promoting portion is provided between said outer layer body and said inner layer body except for the portion provided with said raised bottom portion. The delamination container according to claim 1 or 2, wherein each of the narrow ribs has a width of 0.5 mm to 1.2 mm. The raised bottom part
a disk-shaped portion including the axis of the raised bottom portion;
an inclined surface portion provided between the disk-shaped portion and the ground portion;
The delamination container according to any one of claims 1 to 3, wherein the plurality of thin ribs are provided only on the inclined surface portion. The lamination peeling container according to claim 4, wherein a plurality of concave or convex peeling suppressing portions are provided on the inclined surface portion at regular intervals in the circumferential direction. The delamination container according to claim 5, wherein all of the plurality of detachment suppressing portions are concave. The delamination container according to any one of claims 1 to 6, wherein the outer layer body and the inner layer body are made of polyethylene terephthalate resin.

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