JP2022137893A - Lid material and container using the same - Google Patents

Abstract

To provide a lid material which enables reduction in environmental loads.SOLUTION: A lid material is fit into a bottomed cylindrical container body, and has a first resin sheet, and a paper-made mount part partially fixed to the first resin sheet. The mount part has an annular outer frame part fixed to the first resin sheet, and an inner plate part which is arranged inside the annular outer frame part and is fixed to the first resin sheet separately from the outer frame part. The annular outer frame part has a plurality of projection parts projecting inward from the inner peripheral surface, and the projection parts and the outer edge part of the inner plate part are separable from the first resin sheet.SELECTED DRAWING: Figure 3

Description

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

A conventional container for yogurt or the like is disclosed in US Pat. The container comprises a container body, an inner lid and an outer lid. The container body is made of paper with polyethylene on the inner surface side, and is formed into a bottomed cylindrical shape with a flange around the mouth. The inner lid is made of laminated paper with polyethylene on the inner side of the paper and is heat-bonded to the flange. The outer cover is formed of a resin molded product and fitted to the flange of the container body.

The contents can be taken out by removing the outer lid and peeling the inner lid from the flange. Also, the container with the remaining contents can be stored with the outer lid closed.

Jitsuzen Sho 57-140384 (pages 3-10, Figure 9)

However, according to the above conventional container, since the outer cover is formed of a resin molded product, there is a problem that the environmental load is increased.

SUMMARY OF THE INVENTION An object of the present invention is to provide a lid member that can reduce environmental load and a container using the lid member.

In order to achieve the above objects, the lid member according to the present invention is fitted onto a bottomed cylindrical container body. The lid member has a first resin sheet and a paper base part partly fixed to the first resin sheet. The mounting paper portion includes an annular outer frame portion fixed to the first resin sheet, and an inner portion arranged inside the annular outer frame portion and fixed to the first resin sheet separately from the outer frame portion. and a plate portion. The annular outer frame portion has a plurality of protrusions protruding inward from the inner peripheral surface, and the protrusions and the outer edge portion of the inner plate portion are separable from the first resin sheet. .

Further, according to the present invention, in the lid member having the above structure, the outer frame portion and the inner plate portion are partially separated from each other by penetrating the base paper portion and partially not penetrating the outer frame portion and the inner plate portion. A break line having a connecting portion for connection is arranged, and the inner plate portion can be separated from the outer frame portion by breaking the break line.

Further, according to the present invention, in the lid member configured as described above, the convex portion is not adhered to the first resin sheet.

Further, according to the present invention, in the lid member configured as described above, the plurality of protrusions has a pair of protrusions arranged to face each other.

The present invention also provides a container having the lid member configured as described above, wherein the lid member is fitted onto a cylindrical container body with a bottom, and a flange portion extending outward from an upper opening of the container body is sealed. and a second resin sheet. At least a portion of each of the projections is simultaneously locked to the lower surface of the flange to hold the lid on the container body.

Further, according to the present invention, in the container configured as described above, at least a part of the outer edge of the inner plate portion vertically overlaps the flange portion.

ADVANTAGE OF THE INVENTION According to this invention, the lid|cover material which can reduce an environmental load and a container using the same can be provided.

1 is a plan view of an example of a container having a lid member according to the present invention; FIG. FIG. 2 is a cross-sectional view of the container shown in FIG. 1 taken along line II-II. It is an exploded perspective view of a container. It is sectional drawing which expanded the lid|cover material and flange part of a container. Fig. 3 is an enlarged cross-sectional view of the container from which the lid member has been removed; FIG. 5 is an enlarged cross-sectional view of the container when the second resin sheet is unsealed; It is an expanded sectional view of a cover material when performing resealing. Fig. 3 is an enlarged cross-sectional view of the resealed container;

A container 100 having a lid member 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 member 20 according to the 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. FIG. In FIGS. 1 and 3, the state of bonding between the first resin sheet 30 and the bonding portions 415 and 416 of the outer frame portion 41 of the mounting paper portion 40 is indicated by cross hatching. 1 and 3, a fixing portion 46 for fixing the inner plate portion 42 to the first resin sheet 30 is also indicated by cross hatching. In this specification, the direction of gravity is defined as downward, and the opposite direction is defined as upward.

<Container 100>
As shown in FIG. 1 , the container 100 has a container body 10 and a lid member 20 . Inside the container 100, a content S (see FIG. 2, etc.) is accommodated. Here, the content S is assumed to be a food (for example, a gel such as yogurt, jelly, jam, etc.), but is not limited to this. For example, the contents S may be powdered foods such as salt, sugar and spices, or solid foods such as processed meat. In addition, contents S other than food, such as lubricants such as grease, hairdressing agents, fragrances, and wet wipes, may be accommodated.

<Container body 10>
The container main body 10 has a bottomed tubular shape capable of accommodating the contents S in the internal accommodation space 10S. In the container 100 of the present embodiment, for example, the container body 10 may have a configuration in which paper is used as a base material and a coating layer having water resistance, gas barrier properties, etc. is provided inside. Examples of water-resistant coating layers include resin layers made of polyethylene (PE), polyethylene terephthalate (PET), and the like. Moreover, an aluminum layer can be mentioned as the coating layer having a gas barrier property.

Note that the container body 10 may be made of a thermoplastic resin such as polypropylene (PP) or polystyrene (PS). Further, the container body 10 is not limited to these resins, and a wide range of resins that are easy to mold can be used. Moreover, 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 substantially non-toxic to the human body.

As shown in FIGS. 1 and 2 , the container body 10 has a bottom portion 11 , side wall portions 12 and flange portions 13 . The side wall portion 12 has a tubular shape extending vertically. A lower portion of the side wall portion 12 is closed by the bottom portion 11 . That is, the container body 10 has a cylindrical shape with a bottom. An opening 14 is formed in the upper end portion of the side wall portion 12 for taking in and out the content S accommodated inside the accommodation space 10S. The opening 14 vertically faces the bottom portion 11 . As shown in FIG. 2, opening 14 is larger than bottom 11, but is not so limited.

The side wall portion 12 is formed by bending a single plate-shaped member into a ring shape and adhering both ends thereof. The side wall portion 12 extends vertically, and the bottom portion 11 is fixed at a position shifted upward from the lower end portion (see FIG. 2). By configuring in this way, the rigidity of the bottom portion 11 can be increased. In addition, when the container body 10 is an integrally molded resin body, the bottom portion 11 may be connected to the lower end portion of the side wall portion 12 . The flange portion 13 extends outward from the upper end of the side wall portion 12 . That is, the flange portion 13 is arranged outside the opening 14 .

In the container body 10, the outer shape of the bottom portion 11, the outer shape and inner shape of the side wall portion 12 (the outer shape of the opening 14), and the outer shape of the flange portion 13 are all curved corners and adjacent corners in plan view. It is a substantially rectangular shape (here, a substantially rectangular shape is assumed, but a substantially elliptical shape or the like may also be used) having two straight line portions, which are substantially similar to each other. However, it is not limited to this, and may be circular or substantially regular polygonal.

<Lid material 20>
The lid member 20 will be described with reference to the drawings. FIG. 4 is an enlarged sectional view of the lid member 20 and the flange portion 13 of the container 100. As shown in FIG. The lid member 20 is arranged on the upper part of the container body 10 and is fitted on the container body 10 . As shown in FIGS. 3 and 4 , the lid member 20 has a first resin sheet 30 and a mounting paper portion 40 .

For example, high-quality paper, kraft paper, imitation paper, coated paper, or the like is used as the mount 40 . The basis weight of the mounting paper portion 40 can be, for example, 100 g/m ² to 500 g/m ² . The mounting paper portion 40 is more rigid than the first resin sheet 30 , and by providing the mounting paper portion 40 , the containers 100 can be stacked and arranged.

The mount portion 40 has an outer frame portion 41 and an inner plate portion 42 . A printing 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 to be accommodated inside the accommodation space 10S of the container body 10, product images, and the like. In addition, when printing is unnecessary, the printing layer may be omitted.

The outer frame portion 41 has a substantially rectangular annular shape with curved corners in plan view. That is, the outer frame portion 41 has a pair of long side portions 411 and a pair of short short side portions 412 facing each other.

The mounting paper portion 40 is arranged outside the flange portion 13 in plan view. As shown in FIGS. 1 and 3, the outer frame portion 41 includes a pair of convex portions 413 protruding inward from the inner peripheral surface of a pair of long side portions 411 of the inner peripheral portion 410, and a pair of short side portions 412. and a pair of projections 414 protruding inward from the inner peripheral surface of the.

The convex portion 413 has a curved shape that bulges inward in plan view. As shown in FIGS. 1 and 3, the curved shape of the convex portion 413 is an arc. However, it is not limited to this, and may be, for example, an elliptical arc shape, a trapezoidal shape, a triangular shape, or the like.

Both ends of the curved portions of the convex portion 413 and the convex portion 414 are arranged outside the inner peripheral portion of the outer frame portion 41 . In other words, the protrusions 413 and 414 are formed from the intermediate portion in the width direction of the outer frame portion 41 in plan view. With this configuration, when the outer frame portion 41 is curved, the end portions of the convex portions 413 and 414 can be moved outward compared to the case where the convex portions 413 and 414 protrude only from the inner peripheral portion. If the projections 413 and 414 can be sufficiently widened when the outer frame portion 41 is bent, both ends of the projections 413 and 414 are formed continuously with the inner peripheral portion 410 . good too.

Both ends of the curved portions of the projections 413 and 414 are connected to small circular arc portions having a radius smaller than the radius of the curved portions. By configuring in this way, the length of the connecting portion of the projections 413 and 414 to the outer frame portion 41 can be shortened, and the outer frame portion 41 can be easily deformed.

Examples of the first resin sheet 30 include a polyethylene (PE) resin film, a polyethylene terephthalate (PET) resin film, or a laminate thereof. In plan view, the outer shape of the first resin sheet 30 is the same shape as the outer frame shape of the outer frame portion 41 . The first resin sheet 30 vertically overlaps the outer frame portion 41 . Adhesive portions 415 are arranged outside the convex portions 413 of the pair of long side portions 411 on the upper surface of the outer frame portion 41 . Similarly, a bonding portion 416 is arranged outside the convex portions 414 of the pair of short side portions 412 on the upper surface of the outer frame portion 41 .

The adhesive portion 415 and the adhesive portion 416 are adhered to the first resin sheet 30 via an adhesive layer 418 (see FIG. 4 and the like). By bonding the adhesive portion 415 and the adhesive portion 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, portions other than the adhesion portion 415 and the adhesion portion 416 are non-adhesion regions 417 that are not adhered. The convex portion 413 and the convex portion 414 are formed in the unbonded region 417 . That is, the protrusions 413 and 414 are not adhered 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 portion 413 formed in the non-bonded area 417 is separated from the first resin sheet 30 and moved so as to be flush with the bonded portion 415 . The convex portion 414 when the bonding portion 416 is bent also moves in the same manner.

As shown in FIGS. 1 and 3, in the lid member 20, the adhesive portion 415 and the adhesive portion 416 are discontinuous. With this configuration, 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 be bent independently. If the long side portion 411 and the short side portion 412 of the outer frame portion 41 can be bent by an amount necessary 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 .

Between the outer frame portion 41 and the inner plate portion 42 of the mounting paper portion 40, a breaking line 43 is arranged to penetrate in the thickness direction. An outer frame portion 41 and an inner plate portion 42 are formed by forming a breaking line 43 in the mounting paper portion 40 .

The breaking line 43 has a connecting portion 431 . The connecting portion 431 is a portion where the outer frame portion 41 and the inner plate portion 42 are connected. 1, the connection portion 431 is shown as a solid dot, 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 connecting portion 431 connects the outer frame portion 41 and the inner plate portion 42 . By cutting the connection portion 431 in the mounting paper portion 40 , the inner plate portion 42 is separated from the outer frame portion 41 along the breaking line 43 .

The connecting portion 431 is of a size that can be easily cut without using a tool such as a knife when separating the inner plate portion 42 from the outer frame portion 41 along the breaking line 43 . In the lid member 20 , the connecting portions 431 are provided at each corner of the inner plate portion 42 . However, the number is not limited to this, and the number is not limited to four as long as the outer frame portion 41 and the inner plate portion 42 can be connected. In order to stably support the inner plate portion 42 with the outer frame portion 41 , at least two connecting portions 431 are preferably provided, and preferably provided at a position that does not easily interfere with the convex portions 413 and 414 . .

In addition, in the present embodiment, the inner plate portion 42 of the mounting paper portion 40 substantially overlaps the breaking line 43 in plan view. Therefore, the opening inside the outer frame portion 41 can be closed with the inner plate portion 42 . However, it is not limited to this. The inner plate portion 42 has a size and shape that can be accommodated 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 member 20 can be increased, and the containers 100 sealed with the lid member 20 can be stacked and arranged. can be done. In other words, the inner plate portion 42 preferably has substantially the same size as the inner opening of the outer frame portion 41 .

As shown in FIGS. 1, 3, etc., the central portion 421 of the upper surface of the inner plate portion 42 is fixed to the first resin sheet 30 via the fixing portion 46 . The fixed part 46 has, for example, an adhesive layer using an adhesive. The fixing portion 46 may use the same adhesive as the adhesive layer 418, or may use a different adhesive. An outer edge portion of the upper surface of the inner plate portion 42 has an unfixed region 422 that is not fixed to the first resin sheet 30 . The lid member 20 has the configuration described above.

As shown in FIGS. 2 and 3, the container 100 has a second resin sheet 50 that covers the upper end of the container body 10 and is sealed to the flange portion 13 to seal the housing space 10S of the container body 10. As shown in FIG. The second resin sheet 50 is, for example, a laminate of a PE resin, a PE resin film, or the like as a sealant layer and a PET resin film, an ONY film, or the like as a base layer, and is used for hermetic sealing such as sealing performance, water resistance, and gas barrier performance. Resin sheets or laminates thereof having necessary functions can be widely employed. The sealing of the second resin sheet 50 to the flange portion 13 is performed, for example, by heat sealing, but a sealing method other than heat sealing may be employed.

As shown in FIG. 2 , in the container 100 , the second resin sheet 50 is heat-sealed to seal the contents S in the container space 10</b>S of the container body 10 . The inner plate portion 42 is installed on the second resin sheet 50 by locking the convex portion 413 and the convex portion 414 of the outer frame portion 41 to the flange portion 13 .

Here, operations for 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 member 20 removed. FIG. 6 is an enlarged sectional view of the container 100 when the second resin sheet 50 is opened. FIG. 7 is an enlarged cross-sectional view of the lid member 20 when resealing. FIG. 8 is an enlarged cross-sectional view of resealed container 100 .

4 to 8 show cross sections of the short side portion 412 of the mounting paper portion 40 of the lid member 20, the long side portion 411 has the same configuration. Further, in the following description, attaching the lid member 20 so as to reclose the opening 14 of the container body 10 that has been opened by peeling the second resin sheet 50 from the flange portion 13 once means that the lid member 20 is resealed. called.

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

In addition, foreign substances such as moisture, dirt, and dust are prevented from entering the housing space 10S, and a hygienic state can be maintained at the time of sealing. In addition, it is possible to suppress the outflow of gases such as air and water vapor in the accommodation space 10S to the outside. As a result, drying of the contents S can be suppressed, and odor leakage to the outside or transfer of the odor to the contents S can be suppressed.

In the container 100 , the unbonded portion of the outer frame portion 41 arranged on the upper surface of the second resin sheet 50 sealed to the flange portion 13 is locked to the flange portion 13 . Thereby, the lid member 20 is held by the container body 10 .

As shown in FIG. 5, the lid member 20 is removed from the second resin sheet 50 . More specifically, the outer frame portion 41 of the lid member 20 held by being engaged with the flange portion 13 is removed from the flange portion 13 and separated from the second resin sheet 50, whereby the lid member 20 is It is removed from the second resin sheet 50 sealed to the flange portion 13 of the container body 10 .

Then, as shown in FIG. 6, the second resin sheet 50 is separated from the container body 10 . In the container 100 of the present embodiment, one of the corners of the second resin sheet 50 is formed with a curved portion having a smaller radius than the other corners as a grip portion 51 (Fig. 1 , see FIG. 3). By pinching the grip portion 51 and lifting it upward, the second resin sheet 50 is separated (peeled) from the flange portion 13 of the container body 10, and the container body 10 is unsealed.

By unsealing the container body 10, the content S stored inside the storage space 10S of the container body 10 can be taken out from the opening 14 to the outside. The second resin sheet 50 is completely removed from the flange portion 13 of the container body 10 . Note that the grip portion 51 may be omitted if the second resin sheet 50 can be easily peeled off. The second resin sheet 50 is unnecessary after the second resin sheet 50 is peeled off from the flange portion 13 .

Although it depends on the contents S, there are cases in which the leftovers taken out are stored in the storage space 10S. In such a case, the container body 10 is resealed with the lid member 20 to close the opening 14 .

The resealing of the container body 10 with the lid member 20 will be described below with reference to the drawings. The outer frame portion 41 and the inner plate portion 42 are fixed to the first resin sheet 30 at different portions. Both the non-adhered region 417 of the outer frame portion 41 and the non-fixed region 422 of the inner plate portion 42 are separated from the first resin sheet 30 . The unbonded region 417 of the outer frame portion 41 and the unfixed region 422 of the inner plate portion 42 may be held by the first resin sheet 30 with a release agent layer made of a release agent or the like.

As shown in FIG. 1 and the like, the projections 413 and 414 of the lid member 20 vertically overlap the flange portion 13 . 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 faces upward. An inner edge portion of the outer frame portion 41 is an unbonded region 417 . Therefore, when the outer frame portion 41 is bent, the adhesive portions 415 and 416 maintain the state in which the first resin sheet 30 is attached, and the unbonded area 417 separates from the first resin sheet 30 .

As a result, the convex portions 413 and 414 of the lid member 20 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 container body 10 is covered from above with the cover member 20 having the outer side bent in this way. By doing so, the projections 413 and 414 can be moved downward from the outside of the flange portion 13 . In addition, in the lid member 20 , the outer edge of the inner plate portion 42 is the unfixed region 422 and is separated from the first resin sheet 30 . Therefore, when the outer frame portion 41 is bent, the first resin sheet 30 is easily bent.

At least part of the outer edge of the inner plate portion 42 comes into contact with the upper surface of the flange portion 13 by bringing the outer frame portion 41 closer to the upper portion of the container body 10 in a bent state. By rotating the bent outer frame portion 41 in the original direction while maintaining the state in which the first resin sheet 30 is in contact with the flange portion 13 , the inner sides of the convex portions 413 and 414 of the outer frame portion 41 are rotated. The end wraps around below the flange portion 13 (see FIG. 8). By doing so, the once opened container body 10 can be resealed with the lid member 20 .

At the time of resealing, the pair of projections 413 are engaged with the long sides of the flange portion 13 and the pair of projections 414 are engaged with the short sides of the flange portion 13 . This makes it difficult for the cover member 20 to shift. However, it is not limited to this. At least one of the pair of protrusions 413 or the pair of protrusions 414 that are arranged to face each other may be provided. By doing so, it is possible to suppress the separation of the first lid portion 21 from the container main body 10 due to vibration or the like during resealing.

During resealing, the inner plate portion 42 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 lid member 20 , a restoring force is generated in the outer frame portion 41 to restore the original state in which the non-bonded area 417 and the first resin sheet 30 are in contact with each other. This restoring force presses the inner plate portion 42 against the upper surface of the flange portion 13 . Thereby, the lid member 20 can reliably reseal the upper portion of the container body 10 .

Further, the lid member 20 is resealed with the inner plate portion 42 in contact with the flange portion 13 . The inner plate portion 42 has high rigidity, and an article can be placed on top of the container 100 resealed with the lid member 20 . Thereby, the resealed container 100 can be stored efficiently.

Further, the first resin sheet 30 covers the opening 14 of the container 100 resealed with the lid member 20 . Therefore, foreign substances such as water (liquid), dust, and dirt can be prevented from entering the housing space 10S of the container body 10 . As a result, even after opening, the content S can be stored while preventing contamination by foreign matter.

Further, after the container body 10 is resealed by the lid member 20 , the lid member 20 bends the long side portions 411 and the short side portions 412 of the outer frame portion 41 so that the inner ends of the convex portions 413 and 414 are bent. is moved to the outside of the flange portion 13 (see FIG. 7), the lid member 20 can be removed from the container body 10, that is, it can be opened again. In other words, by using the lid member 20, the container 100 can be opened and resealed multiple times.

In addition, since the lid member 20 can be resealed, it is possible to reduce the waste amount of resin and reduce the environmental load compared to a structure having a separate resin outer lid.

It should be noted that the present invention is not limited to the configuration described above, and various modifications are possible, and configurations obtained by appropriately combining technical means disclosed in different configurations are also within the technical scope of the present invention. included.

INDUSTRIAL APPLICABILITY According to the present invention, the container can be used as a container that contains food or the like as a content and has a lid that can be opened and closed multiple times.

REFERENCE SIGNS LIST 100 Container S Contents 10 Container body 10S Storage space 11 Bottom 12 Side wall 13 Flange 14 Opening 20 Lid 21 First lid 30 First resin sheet 40 Mounting paper 41 Outer frame 410 Inner periphery 411 Long side 412 Short side portion 413 Protruding portion 414 Protruding portion 415 Bonding portion 416 Bonding portion 417 Unbonded region 418 Adhesive layer 42 Inner plate portion 421 Central portion 422 Unfixed region 43 Fracture line 431 Connecting portion 46 Fixed portion 50 Second resin sheet 51 Holding Department

Claims (8)

A lid material fitted to a bottomed cylindrical container body,
a first resin sheet;
a paper base part partially fixed to the first resin sheet,
The mount part is
an annular outer frame fixed to the first resin sheet;
an inner plate portion arranged inside the annular outer frame portion and fixed to the first resin sheet separately from the outer frame portion;
The annular outer frame portion has a plurality of protrusions protruding inward from the inner peripheral surface,
A cover member in which outer edge portions of the convex portion and the inner plate portion are separable from the first resin sheet. Between the outer frame portion and the inner plate portion, a breaking line is arranged that passes through the mount portion and has a connecting portion that partially does not penetrate and connects the outer frame portion and the inner plate portion. ,
The lid material according to claim 1, wherein the inner plate portion can be separated from the outer frame portion by breaking along the breaking line. 3. The lid material according to claim 1, wherein the outer edge of the inner plate portion is held by a release agent layer interposed between the first resin sheet and the inner plate portion. 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 cover material according to any one of claims 1 to 3, wherein the convex portion is held by a release material layer arranged between the convex portion and the first resin sheet. The cover material according to any one of claims 1 to 5, wherein the plurality of protrusions have a pair of protrusions arranged to face each other. a lid material according to any one of claims 1 to 6;
a cylindrical container body with a bottom on which the lid member is fitted;
a second resin sheet sealed to the flange portion extending outward from the upper opening of the container body;
A container, wherein the lid member is held by the container body by simultaneously locking at least a part of each of the projections to the lower surface of the flange portion. 8. The container according to claim 7, wherein at least a portion of the outer edge of the inner plate portion vertically overlaps the flange portion.

Images