JP7615720B2 - Lid material and container using same - Google Patents

Description

The present invention relates to a lid material and a container in which the lid material is fitted onto the container body.

A conventional container for yogurt, etc. is disclosed in Patent Document 1. This container comprises a container body, an inner lid, and an outer lid. The container body is made of paper with polyethylene on the inside side of the paper, and is formed into a cylindrical shape with a bottom and a flange around the mouth. The inner lid is made of laminated paper with polyethylene on the inside side of the paper, and is thermally bonded to the flange. The outer lid is made of a resin molded product, and fits onto the flange of the container body.

The contents can be removed by removing the outer lid and peeling the inner lid off the flange. The outer lid can also be closed to store the container with the remaining contents.

Jitsuzen No. 57-140384 (pages 3-10, Figure 9)

However, the above-mentioned conventional containers have an issue with the outer lid being made from a resin molded product, which places a large burden on the environment.

The present invention aims to provide a lid material that reduces the environmental impact.

In order to achieve the above object, the lid material according to the present invention is a lid material fitted to a bottomed cylindrical container body. The lid material has a first resin sheet, a second resin sheet arranged vertically on the first resin sheet, and a paper mount arranged between the first resin sheet and the second resin sheet. The mount has an annular outer frame part of which is fixed to the first resin sheet, and an inner plate part arranged inside the outer frame part and fixed to the second resin sheet, and is separably held by at least one of the first resin sheet and the outer frame part. The outer frame part has a plurality of protrusions protruding inward from an inner peripheral surface, and the protrusions are separable from the first resin sheet.

The present invention also provides a lid material having the above-mentioned configuration, in which a break line is disposed between the outer frame portion and the inner plate portion, the break line penetrating the backing portion and having a connecting portion that does not penetrate the outer frame portion and connects the outer frame portion and the inner plate portion, and the inner plate portion can be separated from the outer frame portion by breaking the break line.

In addition, in the lid material of the present invention having the above configuration, the inner plate portion is held by a release agent layer disposed between the inner plate portion and the first resin sheet.

In the lid material of the present invention having the above configuration, the protrusion is not adhered to the first resin sheet.

In addition, in the lid material of the present invention having the above configuration, the protrusions are held by a release material layer disposed between the first resin sheet.

The present invention also provides a lid material with the above-mentioned configuration, which has a pair of protruding portions arranged opposite each other.

The present invention provides a lid material that reduces the environmental impact.

FIG. 1 is a plan view of an example of a container having a lid material according to the present invention. 2 is a cross-sectional view of the container shown in FIG. 1 taken along line II-II. FIG. 4 is an enlarged cross-sectional view of the lid and flange of the container. FIG. FIG. 2 is an enlarged cross-sectional view of the container with the lid removed. FIG. 2 is an enlarged cross-sectional view of the separated lid member. FIG. 11 is an enlarged cross-sectional view of the lid when resealing. FIG. 2 is an enlarged cross-sectional view of the resealed container. FIG. 11 is an enlarged cross-sectional view showing a container having a lid material of a first modified example.

A container 100 having a lid material 20 according to one embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of an example of a container 100 having a lid material 20 according to the present invention. FIG. 2 is a cross-sectional view of the container 100 shown in FIG. 1 taken along line II-II. FIG. 3 is an exploded perspective view of the container 100. In FIGS. 1 and 3, the adhesive state between the first resin sheet 30 and the adhesive parts 415 and 416 of the outer frame part 41 of the mount part 40 is shown with cross-hatching. In addition, in FIGS. 1 and 3, the fixing part 45 that fixes the inner plate part 42 to the second resin sheet 50 is also shown with cross-hatching. In this specification, the direction of gravity is described as downward, and the opposite direction is described as upward.

<Container 100>
As shown in Fig. 1, the container 100 has a container body 10 and a lid material 20. A content S (see Fig. 2, etc.) is contained inside the container 100. Here, the content S is assumed to be food (e.g., gel-like such as yogurt, jelly, jam, etc.), but is not limited to this. For example, the content S may be powdered food such as salt, sugar, spices, or solid food such as processed meat. In addition, the content S may contain lubricants such as grease, hair styling products, fragrances, wet wipes, or other non-food contents S.

<Container body 10>
The container body 10 has a bottomed cylindrical shape capable of accommodating the contents S in the internal storage space 10S. In the container 100 of this embodiment, the container body 10 may have, for example, a paper base material and a coating layer therein having water resistance, gas barrier properties, etc. Examples of the coating layer having water resistance include a resin layer made of polyethylene (PE), polyethylene terephthalate (PET), etc. Examples of the coating layer having gas barrier properties include an aluminum layer.

The container body 10 may be formed from a thermoplastic resin such as polypropylene (PP) or polystyrene (PS). The container body 10 is not limited to these resins, and a wide variety of resins that are easy to mold can be used. When the container 100 is used to store food, at least the inner surface of the container body 10 is made of a material that is non-toxic or nearly non-toxic to the human body.

As shown in Figs. 1 and 2, the container body 10 has a bottom 11, a side wall 12, and a flange 13. The side wall 12 is cylindrical and extends vertically. The lower part of the side wall 12 is closed by the bottom 11. In other words, the container body 10 is cylindrical with a bottom. An opening 14 is formed at the upper end of the side wall 12 for inserting and removing the contents S contained inside the storage space 10S. The opening 14 faces the bottom 11 vertically. As shown in Fig. 2, the opening 14 is larger than the bottom 11, but is not limited to this.

The side wall 12 is formed by bending a single plate-like member into a ring shape and gluing both ends. The side wall 12 extends vertically, and the bottom 11 is fixed at a position shifted upward from the lower end (see FIG. 2). This configuration increases the rigidity of the bottom 11. Note that if the container body 10 is an integrally molded resin body, the bottom 11 may be connected to the lower end of the side wall 12. The flange 13 extends outward from the upper end of the side wall 12. In other words, the flange 13 is positioned outside the opening 14.

In the container body 10, the outer shape of the bottom 11, the outer and inner shapes of the side wall 12 (the outer shape of the opening 14), and the outer shape of the flange 13 are all approximately rectangular (assumed to be approximately rectangular here, but may be approximately elliptical, etc.) with curved corners and two adjacent straight lines in a plan view, and are approximately similar to each other. However, they are not limited to this and may be circular or approximately regular polygonal.

<Covering material 20>
The lid material 20 will be described with reference to the drawings. Fig. 4 is an enlarged cross-sectional view of the lid material 20 and the flange portion 13 of the container 100. The lid material 20 is disposed on the upper portion of the container body 10 and is fitted over the container body 10. As shown in Figs. 3 and 4, the lid material 20 has a first resin sheet 30, a backing portion 40, and a second resin sheet 50.

For example, fine paper, craft paper, imitation paper, coated paper, etc. are used as the mount part 40. The basis weight of the mount part 40 can be, for example, 100 g/m ² to 500 g/m ^2. The mount part 40 has greater rigidity than the first resin sheet 30 and the second resin sheet 50, and providing the mount part 40 makes it possible to arrange the containers 100 in a stacked manner.

The mount portion 40 has an outer frame portion 41 and an inner plate portion 42. A printed layer (not shown) may be provided on the upper surfaces of the outer frame portion 41 and the inner plate portion 42. The printed layer forms information about the contents S contained within the storage space 10S of the container body 10, a product image, etc. Note that if printing is not required, the printed layer may be omitted.

The outer frame portion 41 is an approximately rectangular ring shape with curved corners in a plan view. In other words, the outer frame portion 41 has a pair of opposing long side portions 411 and a pair of short side portions 412.

The mount portion 40 is disposed outside the flange portion 13 in a plan view. As shown in Figs. 1 and 3, the outer frame portion 41 has a pair of protrusions 413 that protrude inward from the inner circumferential surfaces of a pair of long side portions 411 of the inner circumferential portion 410, and a pair of protrusions 414 that protrude inward from the inner circumferential surfaces of a pair of short side portions 412.

The convex portions 413 and 414 have a curved shape that bulges inward in a plan view. As shown in Figs. 1 and 3, the curved shape of the convex portions 413 and 414 is an arc shape. However, this is not limited thereto, and may be, for example, an elliptical arc shape, a trapezoid shape, a triangular shape, etc.

The ends of the curved portions of the convex portions 413 and 414 are disposed outside the inner periphery of the outer frame portion 41. That is, the convex portions 413 and 414 are formed from the middle portion in the width direction of the outer frame portion 41 in a plan view. By configuring in this manner, when the outer frame portion 41 is curved, the ends of the convex portions 413 and 414 can be moved outward compared to when they protrude only from the inner periphery. Note that, if the convex portions 413 and 414 can be sufficiently widened when the outer frame portion 41 is curved, both ends of the convex portions 413 and 414 may be formed continuously with the inner periphery 410.

A small arc portion having a radius smaller than the radius of the curved portion is connected to both ends of the curved portion of the protrusions 413 and 414. By configuring it in this way, the length of the connection portion between the protrusions 413 and 414 and the outer frame portion 41 can be shortened, making it easier to deform the outer frame portion 41.

The first resin sheet 30 may be, for example, a polyethylene (PE) resin film, a polyethylene terephthalate (PET) resin film, or a laminate thereof. In a plan view, the outer shape of the first resin sheet 30 is the same as the outer frame shape of the outer frame portion 41. The first resin sheet 30 overlaps the outer frame portion 41 vertically. An adhesive portion 415 is disposed outside the convex portions 413 of a pair of long side portions 411 on the upper surface of the outer frame portion 41. Similarly, an adhesive portion 416 is disposed outside the convex portions 414 of a pair of short side portions 412 on the upper surface of the outer frame portion 41.

The adhesive portions 415 and 416 are adhered to the first resin sheet 30 via an adhesive layer 418 (see FIG. 4, etc.). By adhering the adhesive portions 415 and 416 to the first resin sheet 30, the outer frame portion 41 is fixed to the lower surface of the first resin sheet 30.

In the outer frame portion 41, the portions other than the adhesive portions 415 and 416 are not bonded, forming the unbonded region 417. The convex portions 413 and 414 are formed in the unbonded region 417. That is, the convex portions 413 and 414 are not bonded to the first resin sheet 30. For example, when the adhesive portion 415 of the outer frame portion 41 is bent upward, the first resin sheet 30 is bent together with the adhesive portion 415. On the other hand, the convex portions 413 formed in the unbonded region 417 are separated from the first resin sheet 30 and moved so that they are on the same plane as the adhesive portion 415. When the adhesive portion 416 is bent, the convex portions 414 also move in the same manner.

As shown in Figures 1 and 3, in the lid material 20, the adhesive portion 415 and the adhesive portion 416 are discontinuous. By configuring it in this manner, the long side portion 411 and the short side portion 412 of the outer frame portion 41 to which the first resin sheet 30 is adhered can each be bent independently. If the long side portion 411 and the short side portion 412 of the outer frame portion 41 can be bent the amount required for resealing, which will be described later, the adhesive portion 415 and the adhesive portion 416 may be connected.

The outer peripheral shape of the inner plate portion 42 is substantially the same as the inner peripheral shape of the outer frame portion 41. Therefore, the inner plate portion 42 can be accommodated inside the outer frame portion 41.

A break line 43 is disposed between the outer frame portion 41 and the inner plate portion 42 of the mount portion 40, penetrating in the thickness direction. By forming the break line 43 in the mount portion 40, the outer frame portion 41 and the inner plate portion 42 are formed.

The break line 43 has a connection portion 431. The connection portion 431 is a portion where the outer frame portion 41 and the inner plate portion 42 are connected. In other words, the connection portion 431 is a discontinuous portion of the break line 43, and is a so-called blade stop portion. Note that the connection portion 431 is shown as a solid dot in FIG. 1, but in reality, it is a portion where the outer frame portion 41 and the inner plate portion 42 are connected, and is not limited to a dot shape. The connection portion 431 connects the outer frame portion 41 and the inner plate portion 42. Then, by cutting the connection portion 431 in the backing portion 40, the inner plate portion 42 is separated from the outer frame portion 41 along the break line 43.

The connection parts 431 are of a size that allows them to be easily cut without using a tool such as a blade when separating the inner plate part 42 from the outer frame part 41 at the break line 43. In the lid material 20, the connection parts 431 are provided at each corner of the inner plate part 42. However, this is not limited to this, and the number is not limited to four as long as the outer frame part 41 and the inner plate part 42 can be connected. In order to stably support the inner plate part 42 with the outer frame part 41, it is preferable to provide at least two connection parts 431, and to provide them in positions that are unlikely to interfere with the protrusions 413 and 414.

In this embodiment, the inner plate portion 42 of the backing portion 40 substantially overlaps with the break line 43 in a plan view. Therefore, the inner plate portion 42 can close the inner opening of the outer frame portion 41. However, this is not limited to this. The inner plate portion 42 can be of a size and shape that fits inside the opening of the outer frame portion 41, and a configuration that can be connected to the outer frame portion 41 at the connection portion 431 can be widely adopted. In addition, by making the inner plate portion 42 substantially the same size as the inner opening of the outer frame portion 41, the rigidity of the lid material 20 can be increased, and the containers 100 sealed with the lid material 20 can be placed one on top of the other. In other words, it is preferable that the inner plate portion 42 is substantially the same size as the inner opening of the outer frame portion 41.

The second resin sheet 50 is fixed to the underside of the inner plate portion 42 via the fixing portion 45. The second resin sheet 50 can be a wide variety of resin sheets or laminates thereof that have the necessary functions for sealing, such as sealing properties, water resistance, and gas barrier properties, such as PE resin and PE resin film, PET resin film, or laminates thereof. The fixing portion 45 has, for example, an adhesive layer using an adhesive. Note that the fixing portion 45 may use the same adhesive as the adhesive layer 418, or a different adhesive.

The outer frame portion 41 of the lid material 20 is fixed to the underside of the first resin sheet 30 by an adhesive layer 418. The inner plate portion 42 is disposed inside the outer frame portion 41 and is connected to and held by the outer frame portion 41 via a connection portion 431. The second resin sheet 50 is fixed to the underside of the inner plate portion 42 via a fixing portion 45. In other words, the lid material 20 has a structure in which the first resin sheet 30, the backing portion 40, and the second resin sheet 50 are stacked in this order from the top.

To explain further, the outer frame portion 41 is not bonded to the second resin sheet 50, and the inner plate portion 42 is not bonded to the first resin sheet 30. Therefore, by breaking the connection portion 431 in the lid material 20, the outer frame portion 41 and the inner plate portion 42 of the mount portion 40 are separated. As a result, the lid material 20 is separated into the first lid portion 21 in which the first resin sheet 30 is bonded to the upper surface of the outer frame portion 41 via the adhesive layer 418, and the second lid portion 22 in which the second resin sheet 50 is bonded to the lower surface of the inner plate portion 42 via the fixing portion 45 (see FIG. 3).

As shown in FIG. 2 etc., in the lid material 20, the underside of the second resin sheet 50 is sealed to the flange portion 13 of the container body 10. In this way, the lid material 20 seals the storage space 10S of the container body 10. The second resin sheet 50 is sealed to the flange portion 13 by, for example, heat sealing, but a sealing method other than heat sealing may also be used.

Here, the operation of opening and resealing the container 100 will be described with reference to the drawings. Fig. 5 is an enlarged cross-sectional view of the container 100 with the lid 20 removed. Fig. 6 is an enlarged cross-sectional view of the separated lid 20. Fig. 7 is an enlarged cross-sectional view of the lid 20 when resealing. Fig. 8 is an enlarged cross-sectional view of the resealed container 100.

Note that while Figures 4 to 8 show a cross section of the short side 412 of the backing portion 40 of the lid material 20, the long side 411 also has a similar configuration. In the following explanation, the act of attaching the lid material 20 so as to close the opening 14 of the container body 10 once it has been opened by peeling the second resin sheet 50 off the flange portion 13 is referred to as resealing.

As shown in FIG. 4, in the container 100, the second resin sheet 50 is sealed to the upper surface of the flange portion 13 of the container body 10, thereby sealing the opening 14 of the container body 10. In this way, by sealing the second resin sheet 50 to the flange portion 13, the lid material 20 closes the opening 14 of the container body 10 and seals the storage space 10S.

This prevents moisture, dust, dirt, and other foreign matter from entering the storage space 10S, making it possible to maintain a hygienic state when sealed. It also prevents air, water vapor, and other gases from within the storage space 10S from escaping to the outside. This prevents the contents S from drying out, and also prevents odors from leaking to the outside or being transferred to the contents S.

As shown in FIG. 5, the lid material 20 is removed from the container body 10. Specifically, the second resin sheet 50 of the lid material 20 is peeled off from the flange portion 13 to separate the lid material 20 from the container body 10 and open the container body 10. At this time, the lid material 20 is completely removed from the container body 10. By opening the container body 10, the contents S stored inside the storage space 10S of the container body 10 can be taken out from the opening 14.

Depending on the contents S, the remaining contents may be stored in the storage space 10S. In such a case, the container body 10 is resealed with the lid 20 to close the opening 14.

The resealing of the container body 10 with the lid material 20 will be described below with reference to the drawings. As shown in FIG. 6, the backing paper portion 40 is separated into an outer frame portion 41 and an inner plate portion 42. To explain in more detail, the connection portion 431 is cut, and the inner plate portion 42 is separated from the outer frame portion 41 along the break line 43. As a result, the inner plate portion 42 is separated from the first resin sheet 30.

The mount 40 is separated into an outer frame 41 and an inner plate 42, and the lid 20 is separated into a first lid 21 in which the outer frame 41 is bonded to a first resin sheet 30, and a second lid 22 in which the inner plate 42 is bonded to a second resin sheet 50. The second lid 22 is no longer needed after opening.

As shown in FIG. 1 etc., in the lid material 20, the convex portions 413 and 414 overlap the flange portion 13 vertically. Therefore, as shown in FIG. 7, the long side portion 411 and the short side portion 412 of the outer frame portion 41 of the first lid portion 21 are bent so that the outer side is facing up. The inner edge portion of the outer frame portion 41 is the unbonded region 417. Therefore, when the outer frame portion 41 is bent, the adhesive portions 415 and 416 maintain their bonded state to the first resin sheet 30, and the unbonded region 417 separates from the first resin sheet 30.

As a result, the convex portions 413 and 414 of the first lid portion 21 move downward away from the first resin sheet 30, and the inner ends of the convex portions 413 and 414 are positioned outside the flange portion 13 (see FIG. 7). The first lid portion 21 with its outwardly bent in this manner is placed over the top of the container body 10. In this way, the convex portions 413 and 414 can be moved downward from the outside of the flange portion 13.

By bringing the outer frame portion 41 in a bent state close to the upper portion of the container body 10, the first resin sheet 30 comes into contact with the upper surface of the flange portion 13. By returning the bent outer frame portion 41 to its original state while maintaining the first resin sheet 30 in contact with the flange portion 13, the inner ends of the convex portions 413 and 414 of the outer frame portion 41 wrap around underneath the flange portion 13 (see FIG. 8). In this way, the container body 10 that has been opened can be resealed with the first lid portion 21.

When resealing, the pair of protrusions 413 engage with the long sides of the flange portion 13, and the pair of protrusions 414 engage with the short sides of the flange portion 13. This makes it difficult for the lid material 20 to slip. However, this is not limited to this. It is sufficient to have at least a pair of protrusions 413 or a pair of protrusions 414 arranged opposite each other. In this way, it is possible to prevent the first lid portion 21 from detaching from the container body 10 during resealing due to vibration, etc.

When resealing, the first resin sheet 30 contacts the upper surface of the flange portion 13, and the convex portions 413 and 414 of the outer frame portion 41 contact the lower surface of the flange portion 13. At this time, the unbonded area 417 of the outer frame portion 41 and the first resin sheet 30 are separated. Therefore, in the first lid portion 21, a restoring force is generated in the outer frame portion 41 that tries to return to the original state in which the unbonded area 417 and the first resin sheet 30 are in contact. This restoring force presses the first resin sheet 30 against the upper surface of the flange portion 13. This allows the first lid portion 21 to reliably reseal the upper portion of the container body 10.

In addition, in the container 100 resealed with the first lid portion 21, the first resin sheet 30 is in contact with the flange portion 13. Because the opening 14 is closed by the lid material 20, it is possible to prevent foreign matter such as water (liquid), dust, and dirt from entering the storage space 10S of the container body 10. This makes it possible to store the contents S while preventing the intrusion of foreign matter even after opening.

In addition, after the container body 10 has been resealed with the lid material 20, the first lid portion 21 can be removed from the container body 10, i.e., opened again, by bending the long side portion 411 and the short side portion 412 of the outer frame portion 41 and moving the inner ends of the convex portions 413 and 414 to the outside of the flange portion 13 (see FIG. 7). In other words, the container 100 can be opened and resealed multiple times by using the first lid portion 21.

In addition, because the lid material 20 is resealable, the amount of resin waste can be reduced compared to a configuration that has a separate resin outer lid, thereby reducing the environmental burden.

<First Modification>
9 is an enlarged cross-sectional view showing a container 100A having a lid material 20A of the first modified example. The container 100A shown in FIG. 9 is different from the container 100 shown in FIG. 4 etc. in that the lid material 20A has a release agent layer 451 between the unbonded region 417 and the inner plate portion 42 and the first resin sheet 30, and has a release agent layer 451 between the outer edge portion of the inner plate portion 42 and the outer frame portion 41 and the second resin sheet 50. Other than this, the container 100A has substantially the same structure as the container 100. Therefore, the same parts of the container 100A as those of the container 100 are given the same reference numerals, and detailed description of the same parts is omitted.

As shown in FIG. 9, in the lid material 20A, the unbonded region 417 and the inner plate portion 42 are held to the first resin sheet 30 by a release agent layer 451 made of a release agent. In addition, the outer edge portion of the inner plate portion 42 and the underside of the outer frame portion 41 are held to the second resin sheet 50 by the release agent layer 451. In this way, the outer edge portion of the second resin sheet 50 is held to the outer frame portion 41 and is therefore less likely to turn over.

In addition, since both the unbonded region 417 and the inner plate portion 42 are held to the first resin sheet 30 by the release agent layer 451, gaps are less likely to form between the unbonded region 417 and the printed layer on the upper surface of the inner plate portion 42 and the first resin sheet 30. This makes it easier for the user to see the printing (text information, images, etc.) formed on the upper surface of the lid material 20 of the container 100.

When the inner plate portion 42 is firmly held to the first resin sheet 30 by the release agent layer 451, the connection portion 431 formed at the break line 43 may be omitted. Also, the number of connection portions 431 may be reduced compared to when the inner plate portion 42 is not held.

The present invention is not limited to the above-mentioned configuration, and various modifications are possible. Configurations obtained by appropriately combining the technical means disclosed in different configurations are also included in the technical scope of the present invention.

The present invention can be used as a container that can hold food and other contents and has a lid that can be opened and closed multiple times.

REFERENCE SIGNS LIST 100 Container 10 Container body 10S Storage space 11 Bottom 12 Side wall 13 Flange 14 Opening 20 Lid 21 First lid 22 Second lid 30 First resin sheet 40 Mount 41 Outer frame 410 Inner circumference 411 Long side 412 Short side 413 Convex 414 Convex 415 Adhesive 416 Adhesive 417 Unadhesive region 418 Adhesive layer 42 Inner plate 43 Fracture line 431 Connection 45 Fixation 50 Second resin sheet 100A Container 20A Lid 451 Release agent layer S Contents

Claims (6)

A lid material configured to be peelably sealed to a bottomed cylindrical container body and to be fitted onto the container body when the container body is resealed after peeling ,
A first resin sheet;
A second resin sheet disposed above and below the first resin sheet;
A paper mount portion is disposed between the first resin sheet and the second resin sheet,
The mount portion is
a ring-shaped outer frame portion having a portion fixed to the first resin sheet;
an inner plate portion that is disposed inside the outer frame portion and fixed to the second resin sheet, and is separably held by at least one of the first resin sheet and the outer frame portion;
The outer frame portion has a plurality of protrusions protruding inward from an inner circumferential surface,
The protrusion is a lid member that is separable from the first resin sheet. A break line is disposed between the outer frame portion and the inner plate portion, the break line penetrating the mount portion and having a connection portion that does not penetrate the mount portion and connects the outer frame portion and the inner plate portion,
The lid according to claim 1 , wherein the inner plate portion is separable from the outer frame portion by breaking the break line. The lid material according to claim 1 or 2, wherein the inner plate portion is held by a release agent layer disposed between the inner plate portion and the first resin sheet. The lid material according to any one of claims 1 to 3, wherein the convex portion is not adhered to the first resin sheet. The covering material according to claim 1 , wherein the protrusions are supported by a release agent layer disposed between the covering material and the first resin sheet. A lid material according to any one of claims 1 to 5, having a pair of protruding portions arranged opposite each other.