JP7039306B2 - Laminated peeling container - Google Patents

Description

The present invention relates to a laminated stripping container.

As a container for storing food seasonings such as soy sauce, beverages, cosmetics, shampoo, rinse, liquid soap, etc. as the content liquid, the outer layer that constitutes the outer shell of the container and the outer layer that can be peeled off from the inside of the outer layer are laminated and reduced. A laminated peeling container (delamination container) made of synthetic resin formed into a double structure including an inner layer body having a container that can be freely deformed is known.

In such a laminated peeling container, when the entire container is covered with an opaque decorative label (shrink label) from the viewpoint of protecting the contents, it is confirmed from the appearance what kind and properties of the content liquid are stored. There is a problem that it cannot be done.

On the other hand, for example, a container has been proposed in which the inside of the container can be visually recognized through the window portion by providing a vertical band-shaped window portion in which a part of the opaque decorative label is transparent or translucent. (See, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2012-91865

By the way, in the container described in Patent Document 1, a transparent window portion is provided at the position of a vertical band-shaped adhesive layer (regulatory band) that adheres the outer layer body and the inner layer body to regulate the peeling of the inner layer body. Therefore, it is necessary to align the window portion provided on the label with the adhesive layer, and there is a concern that the apparatus and the manufacturing process may be complicated.

Therefore, the present invention provides a laminated peeling container having a configuration in which the remaining amount of the content liquid can be easily confirmed from the window portion provided on the decorative label covering the outer surface of the body portion, and the decorative label can be easily attached. The purpose is to do.

The present invention has been made to solve the above problems, and the laminated peeling container of the present invention has an outer layer body having a tubular mouth portion and a bottomed tubular body portion connected to the mouth portion, and the outer layer. A laminated peeling container provided with an inner layer body that is located inside the body and can be deformed in a volume-reducing manner, and a decorative label that covers the outer surface of the body portion.
The body portion comprises a polygonal tubular portion having a plurality of corner portions and a surface portion between the adjacent corner portions.
The decorative label has a transparent or translucent window portion that allows the inside of the outer layer to be visible.
The window portion is characterized in that it is located on the surface portion of the polygonal cylinder portion.

In the laminated stripping container of the present invention, it is preferable that the polygonal cylinder portion has a substantially regular polygonal cross section perpendicular to the axis of the body portion.

Further, in the laminated peeling container of the present invention, it is preferable that the corner portion has a rounded curved shape.

Further, in the laminated peeling container of the present invention, it is preferable that an adhesive layer is provided between the outer layer body and the inner layer body along at least one corner portion.

According to the present invention, there is provided a laminated peeling container having a configuration in which the remaining amount of the content liquid can be easily confirmed from a window provided on a decorative label covering the outer surface of the body portion, and the decorative label can be easily attached. be able to.

It is a side view which shows the laminated peeling container which is one Embodiment of this invention, and shows the laminated peeling container in an upright posture partially in the cross section. It is a top view of the laminated peeling container of FIG. FIG. 3 is a sectional view taken along the line AA of the laminated stripping container of FIG. It is sectional drawing which shows the modification of the laminated peeling container of this invention. It is sectional drawing which shows the modification of the laminated peeling container of this invention. It is sectional drawing which shows the modification of the laminated peeling container of this invention.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

The laminated peeling container 1 according to the embodiment of the present invention shown in FIG. 1 is made of a synthetic resin, which is also called a delamination container (derami container), and is located inside the outer layer 10 and the outer layer 10 and is reduced. It has a double structure having an inner layer body 20 that can be freely deformed. Hereinafter, a case where the laminated peeling container 1 is used as a squeeze type pouring container will be described.

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

The outer layer 10 is a portion constituting the outer shell of the laminated peeling container 1, and has a bottle shape including a mouth portion 11 and a bottomed tubular body portion 12 integrally connected to the lower end of the mouth portion 11. .. The inner layer 20 is, for example, a cylindrical inner mouth portion arranged inside the mouth portion 11 of the outer layer body 10 and an accommodating portion connected below the inner mouth portion and arranged inside the body portion 12 of the outer layer body 10. It can be configured to have and. The accommodating portion 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 and is laminated on the inner surface of the body portion 12 so as to be peelable. The inside of the accommodating portion is the accommodating space S for the content liquid, and the content liquid can be filled in the accommodating portion through the inner mouth portion and the content liquid contained in the accommodating portion is poured out through the inner mouth portion. can do. The accommodating portion 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. Due to the volume reduction deformation of the accommodating portion, the outside air is introduced between the outer layer body 10 and the inner layer body 20 from the outside air introduction port, so that the body portion 12 is maintained or restored to its original shape, and only the accommodating portion is used. Can be easily peeled off from the inner surface of the body portion 12 and deformed in a reduced volume. In the present specification and claims, "peeling" does not necessarily mean only peeling from the adhered state, but also includes leaving the adhered state.

In the present embodiment, both the outer layer body 10 and the inner layer body 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. That is, in this example, the outer layer 10 and the inner layer 20 have a transparent or translucent structure as a whole. The outer layer 10 and the inner layer 20 may be opaque as long as they are at least transparent or translucent at the positions corresponding to the window portion 31 of the decorative label 30, which will be described later.

As shown in FIGS. 1 and 2, the mouth portion 11 has a cylindrical shape, and a male screw 11a is integrally provided on the outer peripheral surface thereof. A spout cap (not shown) provided with a spout by being screwed to a male screw 11a can be attached to the mouth portion 11.

The mouth portion 11 may be provided with an annular protrusion instead of the male screw 11a, and the pouring cap may be mounted by engaging with the protrusion in an undercut shape by tapping. In this case, the mouth portion 11 is not limited to a cylindrical shape, and may have a cylindrical shape, for example, a square tubular shape or an elliptical tubular shape. The inner mouth portion of the inner layer body 20 is not limited to a cylindrical shape, and for example, when the mouth portion 11 is formed into a square cylinder shape or an elliptical cylinder shape, it can be similarly formed into a square cylinder shape or an elliptical cylinder shape. ..

Although not shown, the mouth portion 11 is provided with an outside air introduction port. The outside air introduction port is a through hole that penetrates the mouth portion 11 in the radial direction. The outside air introduction port communicates 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 the outside air introduction port. It should be noted that it is sufficient that one or more outside air introduction ports are formed, and the formation position thereof is not limited to the mouth portion.

A neck ring 14 is integrally provided below the male screw 11a of the mouth portion 11. The neck ring 14 extends in an annular shape over the entire circumference of the mouth portion 11 and projects radially outward from the outer peripheral surface of the mouth portion 11.

The body portion 12 has a shoulder portion 12a, a body portion 12b, and a bottom portion 12c. The shoulder portion 12a is integrally connected to the lower end of the mouth portion 11 and gradually expands in diameter downward so as to project outward in the radial direction with respect to the mouth portion 11. The shoulder portion 12a has a substantially square cross section, but the cross section is circular in the vicinity of the upper end portion (connecting portion with the mouth portion 11). The shape of the shoulder portion 12a is not particularly limited.

The body body portion 12b is integrally connected to the lower end of the shoulder portion 12a at the upper end thereof. The body body portion 12b of this example has flexibility and can be elastically deformed and dented by being squeezed (squeezed), and is restored from the dented state by the elastic force to its original shape by itself. can do. By making the body body portion 12b elastically deformable by squeezing, when the laminated peeling container 1 is used as a squeeze-type pouring container, it is possible to easily perform the pouring operation of the content liquid. 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 between the outer layer 10 and the inner layer 20 through the outside air inlet. The function as the laminated peeling container 1 can be surely exhibited.

The bottom portion 12c is integrally connected to the lower end of the body portion 12b and closes the lower end of the body portion 12b. By grounding the bottom portion 12c, the laminated peeling container 1 can be arranged in an upright posture.

Here, the body portion 12b has a polygonal tube portion 17 having a substantially polygonal cross section (see FIG. 3) perpendicular to the axis O of the body portion 12. In this example, the entire body portion 12b is the polygonal cylinder portion 17, but at least a part of the body portion 12 may be the polygonal cylinder portion 17.

As shown in FIGS. And have. As shown in FIG. 3, the polygonal cylinder portion 17 of this example has a substantially square cross section perpendicular to the axis O. The corner portion 15 may have a rounded curved shape (so-called R shape) as in this example, or may have a sharp or obtuse-angled tip (bent) at the tip. Alternatively, the shape may be such that a so-called chamfered portion having a flat end surface formed at the tip of the corner portion 15 is provided. When the chamfered portion is provided at the tip of the corner portion 15, the size of the chamfered portion is smaller than the size of the chamfered portion 16. Further, the surface portion 16 is not limited to a flat surface, and may be a surface curved in a convex or concave shape. The surface portion 16 of this example is composed of a curved surface that is gently curved toward the outside of the container.

The laminated peeling container 1 includes a decorative label 30 that covers the outer surface of the body portion 12. As the decorative label 30, for example, a shrink label, a roll label, a tack label, or the like can be used. The shrink label is formed of a heat-shrinkable film such as polystyrene (PS) or polyethylene terephthalate (PET), and shrinks by being heated by hot air or the like while being arranged so as to cover the outside of the body portion 12. Then, it is attached in a state of being in close contact with the outer surface of the body portion 12. Further, the roll label is also called a roll label, which is formed in a band shape by a resin film or the like and is wound around the outer surface of the body portion 12, and the overlapping portions at both ends thereof are adhered with an adhesive or the like. It is attached while being wound around the body portion 12. Further, the tack label is formed of laminated paper, synthetic paper, or the like, and is attached to the outer surface of the body portion 12 with an adhesive.

The decorative label 30 is mainly configured to be opaque (hatched portion in FIG. 1) from the viewpoint of protecting the content liquid and decorating the laminated peeling container 1, but has a transparent or translucent window portion 31. is doing. The window portion 31 may be formed by making a part of the decorative label 30 transparent or translucent, or may be formed by cutting out a part of the decorative label 30. The inside of the outer layer 10 can be visually recognized through such a window portion 31. That is, the remaining amount of the content liquid can be confirmed by confirming the change (degree of volume reduction deformation) of the content liquid stored in the storage space S through the window portion 31 and the storage portion of the inner layer body 20.

In this example, the window portion 31 has a vertical band shape, and is vertically oriented from the bottom portion 12c to the shoulder portion 12a via the body body portion 12b so as to be substantially parallel to the axis O in a part of the circumferential direction of the decorative label 30. It extends straight to. Further, the window portion 31 is arranged so as to pass over the surface portion 16 while avoiding the corner portion 15 in the polygonal cylinder portion 17. That is, the window portion 31 is arranged at a position shifted in the circumferential direction with respect to the corner portion 15.

Here, in the polygonal cylinder portion 17, the rigidity of the corner portion 15 is higher than the rigidity of the surface portion 16. Of the accommodating portion of the inner layer 20, the portion corresponding to the corner portion 15 has higher rigidity than the portion corresponding to the surface portion 16, so that the portion corresponding to the corner portion 15 is reduced as compared with the portion corresponding to the surface portion 16. It is difficult to deform inward in the radial direction due to volume deformation. Therefore, as illustrated by the alternate long and short dash line in FIG. 3, the inner layer 20 is peeled off and deformed inward in the radial direction from the portion corresponding to the surface portion 16 before the portion corresponding to the corner portion 15. It becomes. That is, by providing the polygonal cylinder portion 17 on the body portion 12, the inner layer body 20 can be regularly peeled off and deformed in a volume-reduced manner.

Therefore, by arranging the window portion 31 on the surface portion 16, the accurate remaining amount of the content liquid can be easily confirmed through the window portion 31. That is, even if the remaining amount of the content liquid is low, the inner layer 20 is difficult to peel off from the outer layer 10, and the accommodation space S around the corner portion 15 that is easily seen to be always filled with the content liquid is visible from the window portion 31. It is possible to make the accurate remaining amount of the content liquid contained in the accommodation space S visible from the window portion 31 without recognizing the erroneous remaining amount.

From the above viewpoint, the window portion 31 of the decorative label 30 is arranged at a circumferential position as far as possible from the corner portion 15 in which the inner layer body 20 is difficult to peel off from the outer layer body 10, that is, on the central portion of the surface portion 16. Is preferable.

Here, FIGS. 4 to 6 show a modified example of the polygonal cylinder portion 17. The polygonal cylinder portion 17 has a shape in which the cross section perpendicular to the axis O is a substantially equilateral triangle as shown in FIG. 4, a substantially regular hexagon as shown in FIG. 5, or a substantially regular octagon as shown in FIG. May be. In either case, the window portion 31 of the decorative label 30 is arranged on the surface portion 16 avoiding the corner portion 15, so that the accurate remaining amount of the content liquid can be visually recognized from the window portion 31. can.

In the above example, in the polygonal cylinder portion 17, only one vertical band-shaped window portion 31 is provided so as to be located on one surface portion 16, but the number, shape, etc. of the window portions 31 are particularly important. Not limited. For example, the window portion 31 may be provided only in a part in the vertical direction such as only the lower half portion of the decorative label 30. Further, the window portion 31 is not limited to a continuous shape and may be provided intermittently. Further, the band-shaped window portion 31 may be provided so as to be inclined with respect to the vertical direction. The window portions 31 may be scattered at a plurality of locations. Specifically, the window portions 31 corresponding to the plurality of surface portions 16 may be provided, or the plurality of window portions 31 may be provided on one surface portion 16. The shape of the window portion 31 is not limited to a straight vertical strip shape, but may be a strip shape having a curved portion or a bent portion, or may be a circular shape, a polygonal shape, or the like. Further, a plurality of circular or polygonal window portions 31 may be provided at intervals in the vertical direction.

In the present embodiment, it is preferable that the polygonal cylinder portion 17 has a substantially regular polygonal cross section perpendicular to the axis O. According to this, the alignment when the decorative label 30 is attached to the body portion 12 becomes easy. More specifically, a crease can be formed in advance on the decorative label 30 before mounting at a position corresponding to the corner portion 15, and the crease can be mounted in accordance with the position of the corner portion 15. For example, in the case of a shrink label, the annular label is supplied in a folded state. That is, the creases are formed at two positions in the circumferential direction of the label, and the two creases can be aligned with each of the two opposite corner portions 15 in the polygonal cylinder portion 17. In the case of a roll label, the alignment can be facilitated by fixing one end of the band-shaped label to one corner and winding the other end. In the case of a tack label, the surface portion 16 is relatively flat and the amount of sharpening is small, so that it is easy to attach.

In the present embodiment, a vertical band-shaped adhesive layer (adhesive band) is provided between the outer layer 10 and the inner layer 20 by adhering the outer layer 10 and the inner layer 20 and restricting the peeling of the inner layer 20. May be good. In that case, it is preferable that the adhesive band is provided along at least one corner portion 15 of the polygonal tubular portion 17. According to this, since the inner layer body 20 does not peel off from the outer layer body 10 at the corner portion 15 provided with the adhesive layer, the peeling and volume reduction deformation of the inner layer body 20 can proceed more regularly. Then, by arranging the window portion 31 on the surface portion 16 away from the adhesive layer, it becomes easy to confirm the change of the content liquid and the inner layer body 20 of the accommodation space S from the window portion 31. The arrangement position of the adhesive layer is not particularly limited as long as the position of the window portion 31 is avoided, and the number of adhesive layers is not particularly limited.

The corner portion 15 preferably has a rounded curved shape rather than a sharp bent shape. If the corner portion 15 has a sharply bent shape, it becomes difficult for the inner layer body 20 to excessively peel off from the outer layer body 10, which may cause poor peeling. However, by forming the corner portion 15 into a curved shape, the inner layer is appropriately formed. The peeling of the body 20 can be smoothed, and poor peeling of the inner layer 20 can be prevented more reliably.

The laminated peeling container 1 of the present embodiment having the above configuration can be configured as a squeeze container by attaching a pouring cap to the mouth portion 11. In this case, as the injection cap, for example, a check valve for outside air that allows the introduction of outside air to the outside air introduction port and prevents the outflow of outside air from the outside air introduction port to the outside, and an inner port portion are passed through. It is possible to use a structure provided with a check valve for the content liquid, which allows the content liquid to be discharged to the outside and prevents the backflow of the outside air to the inside of the storage portion.

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, the capacity of the accommodating portion is reduced and deformed, and the content liquid is extruded from the opening (pouring outlet) of the pouring cap. It is poured out to the outside. 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 20 try to be restored to the original shape. While the outside air is introduced between the two, the accommodating portion of the inner layer 20 is peeled off 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 is reduced in volume and deformed. As a result, the content liquid contained in the accommodating portion can be poured out without being replaced with the outside air, the contact of the outside air with the content liquid contained in the accommodating portion can be reduced, and deterioration and deterioration thereof can be suppressed.

The laminated peeling container 1 can be formed by blow molding a preform assembly made of synthetic resin. This preform assembly shall have a double structure in which an inner preform made of synthetic resin for forming the inner layer 20 is incorporated inside an outer preform made of synthetic resin for forming the outer layer 10. Can be done.

The outer preform can be formed by injection molding the same synthetic resin material as the outer layer 10 using a mold. The outer preform shall be provided with, for example, a mouth portion having the same shape as the mouth portion 11 of the outer layer body 10, and a substantially test tubular extension portion connected to the lower end of the mouth portion and having a hemispherical bottom portion. Can be done.

The inner preform can be formed by injection molding the same synthetic resin material as the inner layer 20 using a mold. The inner preform is provided with, for example, an inner mouth portion having the same shape as the inner mouth portion of the inner layer body 20, and a substantially test tubular extension portion connected to the lower end of the inner mouth portion and having a hemispherical bottom portion. be able to. The outer preform and the inner preform may be made of polyethylene terephthalate resin, but the outer preform and the inner preform are not limited to this.

By blow molding the preform assembly having such a structure, the laminated stripping container 1 shown in FIG. 1 can be manufactured. In this embodiment, biaxial stretch blow molding is adopted as blow molding. As described above, the method is not limited to the method of forming the preform assembly by combining the outer preform and the inner preform separately molded, and the outer preform and the inner preform are integrally molded in a laminated structure. May be good. Further, the laminated peeling container 1 of the present invention is not limited to the biaxial stretch blow molding using the preform, and may be formed by the extrusion blow molding using the extruded tubular parison.

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

For example, the polygonal cylinder portion 17 may have a substantially polygonal shape even if the cross section perpendicular to the axis O is not a substantially regular polygonal shape. That is, in the cross section, the internal angles of the plurality of corner portions 15 constituting the polygon may be different, or the lengths of the surface portions 16 may be different.

Further, in the above-described embodiment, the laminated peeling container 1 is a squeeze-type pouring in which a pouring cap provided with a spout is attached to the mouth portion 11 and the body portion 12 is squeezed to pour out the content liquid. Although the case where it is used for a container is shown, it is assumed that the body portion 12 has a predetermined rigidity that does not easily squeeze and is used for a container with a pump to which a pump-type dispenser is attached to the mouth portion 11. You can also do it. Further, the laminated peeling container 1 may be tilted in a tilted posture (a posture in which the mouth portion 11 faces downward) so that the content liquid is discharged to the outside by its own weight.

Further, the mouth portion 11 may be configured not to include the neck ring 14, and the shapes of the shoulder portion 12a, the body body portion 12b and the bottom portion 12c can be variously changed. For example, the body body portion 12b may have a shape having a constricted portion. Further, the portion of the body body portion 12b other than the polygonal cylinder portion 17 may have a shape such that the cross section is circular or elliptical, for example.

Further, the outside air introduction port is provided in the mouth portion 11 and is a through hole penetrating the mouth portion 11, but the present invention is not limited to this, and for example, between the upper end of the mouth portion 11 and the upper end of the inner mouth portion. It may be configured as a gap provided and opened to the outside. Alternatively, the outside air introduction port may be provided on the shoulder portion 12a, the body body portion 12b or the bottom portion 12c.

The material of the outer layer 10 is not limited to the polyethylene terephthalate resin, 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.

1: Laminated peeling container 10: Outer layer 11: Mouth 11a: Male screw 12: Body 12a: Shoulder 12b: Body body 12c: Bottom 14: Neck ring 15: Corner 16: Face 17: Polygonal cylinder 20: Inner layer 30: Decorative label 31: Window part O: Axis line S: Accommodation space

Claims (4)

An outer layer having a tubular mouth and a bottomed tubular body connected to the mouth, an inner layer that is located inside the outer layer and can be reduced in volume, and an outer layer that covers the outer surface of the body. With a decorative label with a transparent or translucent window that allows the inside of the body to be seen,
The body portion has a polygonal tubular portion having a plurality of corner portions and a surface portion between the adjacent corner portions.
A method for manufacturing a laminated peeling container in which the window portion is located on the surface portion of the polygonal cylinder portion.
The corners have a rounded curved shape.
The crease forming step of forming a crease on the decorative label and
The crease is aligned with the corner portion , and the window portion is displaced with respect to the corner portion in the circumferential direction of the body portion, and the crease is aligned with the position avoiding the corner portion. A method for manufacturing a laminated peeling container, which comprises a mounting step of mounting a decorative label on the body. The method for manufacturing a laminated peeling container according to claim 1, wherein the polygonal cylinder portion has a substantially regular polygonal shape in a cross section perpendicular to the axis of the body portion. The method for manufacturing a laminated peeling container according to claim 1 or 2 , wherein an adhesive layer is provided between the outer layer body and the inner layer body along at least one corner portion. In the crease forming step, the decorative label is formed in an annular shape and folded, and the creases are formed at two locations in the circumferential direction of the decorative label formed in an annular shape.
The method for manufacturing a laminated peeling container according to any one of claims 1 to 3 , wherein in the mounting step, the two folds are aligned with each of the two opposing corners of the polygonal cylinder portion.

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