JP7455474B2 - Container manufacturing method and container - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for manufacturing a container, and a container, which includes a container body and a lid attached to the container body so as to be openable and closable.

Conventionally, containers for storing contents include a container main body having a main side circumferential wall and a bottom wall that define a storage space for the contents, a lid side circumferential wall and a top wall, and are attached to the container main body so as to be openable and closable. Some devices are known that have a cover that covers the opening of the storage space.

As such a container, for example, Patent Document 1 discloses a flat compact container that stores solid cosmetics such as foundation as contents.

Japanese Patent Application Publication No. 2017-80284

In conventional containers having the above configuration, in order to reduce the weight of the container, it is required to reduce the thickness of the container body and lid. By reducing the thickness of the container body and lid, it is possible to reduce the amount of synthetic resin material used in the container and reduce the environmental impact.

However, in the conventional containers mentioned above, the container body and lid are formed by injection molding of synthetic resin materials, so there is a limit to reducing the thickness of the container body and lid due to molding technology. Therefore, there was a problem in that the container could not be made sufficiently lightweight.

The present invention was developed to solve such problems, and its purpose is to provide a lighter container and a method for manufacturing the same.

The container manufacturing method of the present invention includes a container body including a body side circumferential wall and a bottom wall that define a storage space for contents, a lid side circumferential wall and a top wall, and the container body is attached to the container body so as to be openable and closable. and a lid covering an opening of the storage space, the method comprising: a lid body that covers an opening of the storage space, the heat shrinkage rate in a first direction being greater than the heat shrinkage rate in a second direction perpendicular to the first direction. A slit forming step of forming slits in a heat-shrinkable film, and insert molding of the container body using the film with the slits formed therein as an insert to form an annular frame constituting the main body side peripheral wall . and the film that is fixed to the frame and forms the bottom wall by closing an opening at one end of the frame, and a portion corresponding to the opening of the frame is made up only of the film. and/or insert molding of the lid body using the film in which the slits are formed as an insert to form an annular frame body constituting the lid side peripheral wall and the frame body. and the film is fixed to the frame body to close an opening at one end of the frame body to form the ceiling wall, and a portion corresponding to the opening of the frame body is configured to be composed only of the film. and after the insert molding step, the film is heated and thermally shrunk to generate residual strain in the film, and the slit is transformed into a circular or elliptical hole. It is characterized by having a heating step.

In the container manufacturing method of the present invention, in the above configuration, preferably, in the slit forming step, the slits are formed in the film along the second direction.

In the container manufacturing method of the present invention, in the above configuration, it is preferable that the container body is formed in the insert molding step.

In the container manufacturing method of the present invention, in the above configuration, the bottom wall has a portion composed only of the film at least in the bottom portion of the storage space, and in the slit forming step, the bottom wall is formed of the film. Preferably, the slit is formed in a portion made of chisel.

In the container manufacturing method of the present invention, in the above configuration, it is preferable that the container is a compact container that stores cosmetics as contents.

The container of the present invention includes a container body including a body side circumferential wall and a bottom wall that define a storage space for contents, a lid side circumferential wall and a top wall, and is attached to the container body so as to be openable and closable. a lid body that covers an opening of a storage space, the container body having an annular frame body constituting a peripheral wall on the body side, and a lid body fixed to the frame body and arranged at one end side of the frame body. a film that forms the bottom wall by closing an opening of the frame, a portion of the frame corresponding to the opening is composed only of the film, and the film has a residual strain and has a circular or elliptical hole. and/or the lid has an annular frame constituting the lid-side peripheral wall, and the lid is fixed to the frame to close an opening at one end of the frame to close the ceiling wall. a film comprising the frame, a portion corresponding to the opening of the frame body is composed only of the film, and the film has a residual strain and a circular or elliptical hole. .

According to the present invention, a lighter container and a method for manufacturing the same can be provided.

FIG. 1 is a sectional view of a container that is an embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view of the rear portion of the container shown in FIG. 1; FIG. 2 is an enlarged cross-sectional view of the front portion of the container shown in FIG. 1; FIG. 2 is a plan view of the container body shown in FIG. 1. FIG. It is a top view of the 1st film in which the slit was formed in the slit formation process. FIG. 3 is a cross-sectional view of a container body formed by an insert molding process. It is an explanatory view showing deformation of a slit into a hole in a film heating process. (a), (b), and (c) are explanatory views each showing a modified example of the shape of a hole provided in the film.

Hereinafter, the present invention will be illustrated in detail with reference to the drawings. Below, first, the configuration of a container 1 according to an embodiment of the present invention manufactured by a container manufacturing method according to an embodiment of the present invention will be described.

In addition, in this specification, "upper" is the side where the lid body 20 mentioned later in a closed state is located with respect to the container main body 10 mentioned later, and "lower" is the opposite side. Moreover, the "front" is the side on which the engagement release member 33, which will be described later, is located with respect to the hinge shaft 24, which will be described later, when the lid body 20 is closed, and the "rear" is the opposite side. Furthermore, the width direction is a direction perpendicular to the up-down direction and the front-back direction.

The container 1 according to the present embodiment is a flat compact container used to store cosmetics such as solid foundation, for example.

As shown in FIGS. 1 to 3, the container 1 includes a container body 10 and a lid 20. As shown in FIGS.

The container main body 10 has a rectangular dish shape with a main body side peripheral wall 11 and a bottom wall 12, and includes a storage space 13 defined by the main body side peripheral wall 11 and the bottom wall 12. The container body 10 can store contents in the storage space 13.

As shown in FIG. 4, in the present embodiment, the container body 10 has a storage space 13 divided by a partition wall 14 into two spaces lined up in the width direction, namely a first storage space 13a and a second storage space 13b. The structure is as follows.

The first storage space 13a is configured to be able to store a refill container 15 filled with cosmetics. That is, in the present embodiment, the container main body 10 is configured to store the contents, which are cosmetics, in the storage space 13 together with the refill container 15 in a state where the refill container 15 is filled with the cosmetic.

Note that the container body 10 can also be configured to include a shock absorbing section in the storage space 13 for absorbing shocks to the contents or the refill container 15.

The second storage space 13b is configured to be able to store an applicator 16, such as a puff, for applying the contents to a target.

As shown in FIGS. 1 to 3, the lid 20 has a rectangular lid shape including a lid-side peripheral wall 21 and a top wall 22, and is attached to the container body 10 so as to be openable and closable. The lid 20 covers the opening of the storage space 13, and opens the opening of the storage space 13 to the outside when opened to the container body 10.

In this embodiment, a connecting portion 23 is integrally provided on the rear side portion (the right side portion in FIG. 1) of the lid-side peripheral wall 21 of the lid body 20, and the lid body 20 is connected to the hinge shaft 24 at the connecting portion 23. It is rotatably connected to the rear portion of the container body 10. The hinge shaft 24 extends along one side of the rear portion of the container body 10 or the lid 20. Thereby, the lid body 20 can open and close the storage space 13 of the container body 10 by rotating about the hinge shaft 24 with respect to the container body 10. The opening/closing direction of the lid 20 is the vertical direction.

The container 1 has a hook mechanism 30 for holding the lid 20 in a closed state. As shown in FIG. 3, the hook mechanism 30 includes a locking protrusion 31 that is integrally provided on the front side of the main body side peripheral wall 11 of the container body 10, and a locking protrusion 31 that is integrally provided on the front side of the top wall 22 of the lid body 20. It has a hook portion 32 provided therein. When the lid body 20 is in the closed state, the hook portion 32 engages with the locking protrusion 31 from below in an undercut manner, thereby holding the lid body 20 in the closed state. On the other hand, when the hook portion 32 moves upward relative to the locking protrusion 31 and is disengaged from each other, the lid 20 becomes openable.

An engagement release member 33 is attached to the front portion of the container body 10 with a portion thereof exposed to the outside. The engagement release member 33 can release the engagement of the hook portion 32 with the locking protrusion 31 by being pushed in the pushing direction toward the inside of the container.

In this embodiment, the disengagement member 33 is an integrally molded product made of a synthetic resin material, and includes an operating portion 33a, a slide wall 33b, a locking claw 33c, and a push-up piece 33d.

The operating section 33a has a wall shape that is vertical in the front-rear direction, and the front surface thereof is exposed to the outside. The slide wall 33b has a plate shape extending inward of the container, and is integrally connected to the lower end of the operating portion 33a. The container main body 10 includes a support wall 17 that projects forward from the lower end portion of the main body side peripheral wall 11. It is movable in the front and rear directions. The locking pawl 33c is provided on the lower surface of the slide wall 33b, and is arranged in the groove 17a provided on the upper surface of the support wall 17 to hold the disengagement member 33 against the container body 10 so as not to come off. ing. The push-up piece 33d protrudes rearward from the operating portion 33a and is swingable in the vertical direction with respect to the operating portion 33a. Corresponding to the push-up piece 33d, an inclined wall 18 is integrally provided on the front surface of the main body side peripheral wall 11 of the container main body 10, and is inclined so as to be located upward toward the rear side.

When the engagement release member 33 is pushed in from the initial position shown in FIG. It is removed from the stopper projection 31. In this manner, when the lid body 20 is closed, by pushing the disengagement member 33 from the initial position in the pushing direction, the push-up piece 33d disengages the hook portion 32 from the locking protrusion 31, and the lid body 20 can be opened.

As shown in FIGS. 1 to 3, the lid 20 includes an annular frame 40 constituting the lid-side peripheral wall 21, and is fixed to the frame 40 to close an opening at one end of the frame 40 and prevent residual strain. The top wall 22 has a portion made up only of the film 41.

A mirror 42 is fixed to a portion of the top wall 22 of the lid body 20 that is made up only of the film 41. The mirror 42 is exposed to the outside when the lid 20 is opened, and the user can view the mirror 42 while using the contents.

Similarly, as shown in FIGS. 1 to 4, the container main body 10 includes an annular frame 60 that constitutes the main body side peripheral wall 11, and is fixed to the frame 60 to close an opening at one end of the frame 60. and a film 61 having residual strain, and the bottom wall 12 has a portion made up only of the film 61.

The frame body 60 that constitutes the main body side peripheral wall 11 includes a peripheral wall portion 60a that comprises four side portions, front, rear, left and right, and constitutes the main body side peripheral wall 11, and an outer member 60b that is fitted and fixed to the outside of the peripheral wall portion 60a. The inner side of the peripheral wall portion 60a is an opening 60c. The opening 60c corresponds to the bottom portions of the first storage space 13a and the second storage space 13b of the container body 10, respectively. The frame 60 is made of synthetic resin. In this embodiment, the frame 60 is made of acrylonitrile-butadiene-styrene copolymer resin (ABS).

Note that the locking protrusion 31 and the inclined wall 18 are integrally provided at the widthwise central portion of the front portion of the peripheral wall portion 60a, and the support wall 17 is integrally provided at the lower end of the front portion of the outer member 60b.

The film 61 is made of a flexible synthetic resin film that is thinner than the peripheral wall portion 60a of the frame 60 or the outer member 60b. In this embodiment, the film 61 is a stretched film made of polystyrene (PS), and has a heat shrinkage coefficient in which the heat shrinkage coefficient in a predetermined first direction is higher than the heat shrinkage coefficient in a second direction perpendicular to the first direction. have. The film 61 is thermally shrunk by being heated by, for example, being blown with steam, hot air, or the like.

The film 61 includes a film main body portion 61a that covers the opening 60c of the frame body 60 and the entire downward facing surface of the outer member 60b of the frame body 60, and a film body portion 61a that reaches the side surface of the outer member 60b and covers a part of the side surface. It has a film extension part 61b, and is fixed to the entire downwardly facing surface and side surface of the outer member 60b.

The portion of the film 61 fixed to the frame 60 that is located in the opening 60c of the film body 61a has residual strain. As a result, the film main body portion 61a is stretched at the opening 60c and has a planar shape substantially parallel to the outer member 60b. That is, the portion of the film main body 61a fixed to the frame 60 that is disposed in the opening 60c has residual stress inside.

Note that, as long as the film 61 is fixed to the frame 60 and covers the entire opening 60c, it may not cover a part of the outer member 60b or the side wall of the outer member 60b. Further, the film 61 may have residual strain throughout.

As shown in FIG. 4, a circular or oval hole 62 is provided in a portion of the film 61 fixed to the frame 60, which is located in the opening 60c corresponding to the second storage space 13b of the film body 61a. It is being That is, the second storage space 13b that accommodates the applicator 16 such as a puff is provided with a hole 62 for releasing moisture absorbed by the applicator 16. In this embodiment, 16 holes 62 are provided in this portion of the film 61, 4 holes 62 are arranged at equal intervals in the front and back, and are arranged in 4 rows in the left-right direction. In FIG. 4, only one hole is labeled for convenience.

As described above, in the container 1 of the present embodiment, the film 61 is fixed to the annular frame 60, so that the portion of the bottom wall 12 corresponding to the opening 60c is composed only of the film 61. It has become something that has been done. In particular, in this embodiment, the bottom wall 12 of the container body 10 is made up of only the film 61 at least in the bottom portion of the storage space 13. Therefore, the thickness of the bottom wall 12 can be made thinner in most parts of the container body 10 compared to a case where the main body side peripheral wall 11 and the bottom wall 12 are entirely formed by injection molding. . Thereby, the amount of synthetic resin material used for the container 1 can be reduced, and the container 1 can be made lighter. Furthermore, since the thickness of most of the bottom wall 12 can be reduced, the container 1 can also be made thinner. Furthermore, by reducing the amount of synthetic resin material used in the container 1, the environmental load can be reduced.

Furthermore, in the container 1 of the present embodiment, the bottom wall 12 is made up of only the film 61 at least in the bottom portion of the storage space 13, so that the container body 10 of the bottom wall 12 can be effectively made thinner. be able to. As a result, the container 1 can be made thinner more effectively, the amount of synthetic resin material used in the container 1 can be further reduced, the container 1 can be further reduced in weight, and the environmental burden can be reduced. It can be further reduced.

Furthermore, in the container 1 of the present embodiment, the film 61 fixed to the frame 60 is configured to have residual strain, so that the portion of the film 61 (film main body 61a) disposed in the opening 60c is It can be stretched in a plane substantially parallel to the member 60b. Thereby, the appearance of the container 1 can be improved by suppressing the occurrence of wrinkles, loosening, distortion, etc. in the portion of the container body 10 that is made up only of the film 61.

Furthermore, in the container 1 of the present embodiment, the hole 62 is provided in the portion of the film body 61a that is located in the opening 60c corresponding to the second storage space 13b. The moisture absorbed by the applicator 16 is released to the outside, thereby suppressing deterioration of the applicator 16.

In the container 1 of the present embodiment, the refill container 15 is filled with contents and is stored in the first storage space 13a of the container body 10, and the bottom of the refill container 15 stored in the first storage space 13a is A slight gap is provided between this part and the film 61 forming the bottom part of the first storage space 13a. With such a configuration, even if the bottom portion of the first storage space 13a of the container body 10 is made up of only the film 61, it is difficult to store the contents in the first storage space 13a, use the contents, etc. In this case, damage to the film 61 can be suppressed by preventing the load applied to the refill container 15 and the contents from being directly transmitted to the film 61. Furthermore, since the film 61 is thin and can be flexibly expanded and contracted, the refill container 15 can be easily removed from the first storage space 13a by forcing the film 61 from the outside of the bottom wall 12 toward the inside of the container. Can be removed.

The container body 10 is an insert molded product in which an outer member 60b and a film 61 are integrated. In this embodiment, the container body 10 is an insert molded product in which the outer member 60b and the film 61 are integrated, and the peripheral wall portion 60a is fitted and fixed to the insert molded product. . In this way, by forming a part of the container body 10 as an insert molded product, the container body 10 can be manufactured easily and accurately.

The container 1 having the above structure including the container body 10 which is an insert molded product can be manufactured by a container manufacturing method according to an embodiment of the present invention. Below, a procedure for manufacturing the container body 10 by a container manufacturing method that is an embodiment of the present invention will be shown.

First, as shown in FIG. 5, a film body portion 61a having a shape corresponding to the outer member 60b of the frame body 60 and eight film overhanging portions 61b extending from each side of the film body portion 61a have a predetermined shape. A film 61 is prepared. As described above, the film 61 is a stretched polystyrene film, and has a heat shrinkage rate in a first direction corresponding to the left-right direction that is higher than a heat shrinkage rate in a second direction perpendicular to the first direction. It is something.

Next, a plurality of slits 70 each extending along the second direction are formed in a portion of the film 61 that is arranged in the opening 60c corresponding to the second storage space 13b and is composed only of the film 61 (slit forming step). ). The plurality of slits 70 are formed in positions corresponding to the plurality of holes 62. Each slit 70 is a cut made by cutting the film 61 with a blade such as a cutter.

Next, an outer member 60b and a film 61 that is fixed to the outer member 60b and closes an opening at one end of the outer member 60b are formed by insert molding using the film 61 in which a plurality of slits 70 are formed as an insert. An insert molded product (container body 10) having the configuration is formed (insert molding process).

More specifically, the film 61 in which a plurality of slits 70 were formed was placed as an insert in an injection mold, and then heated to a predetermined temperature to become molten inside the mold. Insert molding is performed by injecting synthetic resin material (acrylonitrile-butadiene-styrene copolymer resin). Thereby, as shown in FIG. 6, an insert molded product is formed in which the film 61 is integrally fixed to the outer member 60b. At this time, wrinkles and slack will occur in the film 61 due to shrinkage of the synthetic resin material due to injection molding.

Next, the film 61 fixed to the outer member 60b by the insert molding process is heated by, for example, blowing steam or hot air, and the part of the film 61 that is made up only of the film 61 (the part that covers the opening 60c) is heated. The film is heat-shrinked to remove wrinkles, slack, and distortion, while leaving residual strain (film heating process). As a result, the portion of the container body 10 that is made up only of the film 61 can be made into a highly aesthetically pleasing state in which the film 61 is stretched with residual strain and is free from wrinkles, slack, distortion, etc. .

Next, the peripheral wall portion 60a, which is separately formed by injection molding, is fitted and fixed to the outer member 60b to form the container body 10.

As described above, according to the container manufacturing method of the present embodiment, the film 61 is fixed to the outer member 60b constituting the annular frame 60, so that the portion corresponding to the opening 60c of the bottom wall 12 is fixed to the film 61. It is possible to easily manufacture a container 1 having a thin and lightweight container main body 10 made of only one material.

Furthermore, in the container manufacturing method of the present embodiment, in the film heating step, the film 61 fixed to the outer member 60b is heated to heat-shrink the portion of the film 61 that is made up only of the film 61, as shown in FIG. As shown in FIG. 2, a plurality of slits 70 formed in a portion of the film 61 consisting only of the film 61 are each transformed into a circular hole 62. That is, the film 61 has a heat shrinkage rate in a first direction corresponding to the left-right direction that is higher than a heat shrinkage rate in a second direction perpendicular to the first direction. Since the slits 70 are each formed to extend along the second direction, in the film heating process, the film 61 thermally shrinks more in the first direction than in the second direction, and as a result, the slits 70 It is stretched more in the first direction than in the second direction and deformed into a circular shape.

As described above, in the container manufacturing method of the present embodiment, in the slit forming step, the film 61 has a heat shrinkage property in which the heat shrinkage coefficient in the first direction is larger than the heat shrinkage coefficient in the second direction perpendicular to the first direction. A slit 70 is formed along the second direction, and after integrally fixing the film 61 to the outer member 60b of the frame body 60 in the insert molding process, the film 61 is heat-shrinked in the film heating process. Since the slit 70 is deformed into a circular shape, it is not necessary to form the hole 62 in the film 61 using a cutting die or the like after the film 61 is integrally fixed to the outer member 60b of the frame 60. A circular hole 62 can be easily provided in the film 61 fixed to the outer member 60b of 60. Therefore, the productivity of the container 1 provided with this container body 10 can be increased.

The holes 62 provided in the film 61 of the container body 10 are not limited to circular shapes, but may be oval shapes. For example, due to the degree of heating of the film 61 in the film heating process and the difference in the thermal shrinkage rate of the film 61 in the first direction and the second direction, the slit 70 may be formed in the film heating process as shown in FIG. 8(a). In some cases, the film 61 is deformed into an elliptical shape with the short axis in the first direction and the long axis in the second direction. In this case, the holes 62 of the film 61 may be formed into an elliptical shape. In addition, due to the degree of heating of the film 61 in the film heating process and the difference in the thermal shrinkage rate of the film 61 in the first direction and the second direction, the slit 70 may be formed in the film heating process as shown in FIG. 8(b). In some cases, the film 61 is deformed into an elliptical shape with the long axis in the first direction and the short axis in the second direction. In this case, the holes 62 of the film 61 may be formed into an elliptical shape. Furthermore, as shown in FIG. 8(c), in the film forming process, a slit 70 may be formed in the film 61 so as to extend along a direction inclined with respect to the first direction and the second direction. . In this case, in the film heating process, the slit 70 is deformed into an ellipse whose long axis and short axis are inclined with respect to the first direction and the second direction, respectively, so that the elliptical hole 62 is formed.

Note that the elliptical hole 62 is not limited to a mathematically perfect ellipse (a curve made from a set of points such that the sum of the distances from two focal points is constant); That's fine.

It goes without saying that the present invention is not limited to the embodiments described above, and can be modified in various ways without departing from the spirit thereof.

For example, in the embodiment described above, a case was shown in which the container body 10 was formed by the container manufacturing method of the present embodiment, but holes were provided in the portion of the top wall 22 of the lid 20 formed only by the film 41. structure, and may be formed by the container manufacturing method of this embodiment.

Moreover, the container main body 10 can also have a structure in which the frame body 60 is integrated with the peripheral wall portion 60a and the outer member 60b.

Further, in the above embodiment, a stretched polystyrene film is used as the film 61, but the film 61 is not limited to this, and any material that shrinks when heated may be used, such as polypropylene (PP). A film made of synthetic resin material may also be used.

Furthermore, in the embodiment described above, the frame 60 is made of acrylonitrile-butadiene-styrene copolymer resin, but is not limited thereto, and may be made of other synthetic resin materials. In this case, the film 61 is made of a material or has a layered structure that can be adhered to the frame 60.

Furthermore, in the embodiment described above, the film 61 is heated by blowing steam, hot air, etc. in the film heating process, but the heating method is not limited to this and can be changed in various ways.

Further, in the embodiment described above, the container 1 is rectangular and flat, but the shape is not limited to this, and the shape can be changed in various ways.

Further, in the embodiment described above, the container 1 is used to store cosmetics such as foundation as the contents, but the container 1 is not limited to this, and can be used to store various contents as the contents. be able to.

Further, in the embodiment, the lid 20 is connected to the container body 10 by the hinge shaft 24 and is opened and closed by rotating about the hinge shaft 24 with respect to the container body 10. However, the opening and closing structure of the lid 20 with respect to the container body 10 can be changed in various ways, such as a structure that opens and closes the lid 20 in a sliding manner with respect to the container body 10 or a structure that is assembled to the container body 10 from above. It is.

Furthermore, the structure of the hook mechanism 30, the structure of the disengagement member 33, and the inclined wall 18 can also be changed in various ways.

1 Container 10 Container body 11 Main body side peripheral wall 12 Bottom wall 13 Storage space 13a First storage space 13b Second storage space 14 Partition wall 15 Refill container 16 Applicator 17 Support wall 17a Groove 18 Slanted wall 20 Lid body 21 Lid side peripheral wall 22 Top Wall 23 Connecting portion 24 Hinge shaft 30 Hook mechanism 31 Locking protrusion 32 Hook portion 33 Disengagement member 33a Operating portion 33b Slide wall 33c Locking claw 33d Push-up piece 40 Frame 41 First film 42 Mirror 60 Frame 60a Surrounding wall Portion 60b Outer member 60c Opening 61 Film 61a Film main body 61b Film overhang 62 Hole 70 Slit

Claims (6)

a container body including a body side peripheral wall and a bottom wall that define a storage space for contents;
A container manufacturing method for manufacturing a container comprising a lid-side peripheral wall and a top wall, and a lid body that is openably and closably attached to the container body and covers an opening of the storage space, the method comprising:
a slit forming step of forming a slit in a film having heat shrinkability in which the heat shrinkage rate in a first direction is higher than the heat shrinkage rate in a second direction perpendicular to the first direction;
The container body is formed by insert molding using the film in which the slits are formed as an insert, thereby forming an annular frame that constitutes the main body side peripheral wall and a frame that is fixed to the frame and forms one end of the frame. the film that closes the opening and forms the bottom wall , and forming a part of the frame body corresponding to the opening to be composed only of the film, and/or the lid body; , by insert molding using the film in which the slits are formed as an insert, the annular frame constituting the lid side circumferential wall, and the annular frame that is fixed to the frame and closes the opening on one end side of the frame, the film constituting the ceiling wall, and a step of forming a structure in which a portion corresponding to the opening of the frame is composed only of the film ;
After the insert molding step, the method further comprises a film heating step of heating the film to heat shrink it to generate residual strain in the film and transforming the slit into a circular or elliptical hole. A container manufacturing method. The container manufacturing method according to claim 1, wherein in the slit forming step, the slit is formed in the film along the second direction. The container manufacturing method according to claim 1 or 2, wherein the container body is formed in the insert molding step. The bottom wall has a portion consisting only of the film at least in the bottom portion of the storage space,
4. The container manufacturing method according to claim 3, wherein in the slit forming step, the slit is formed in a portion of the film that is made up only of the film. The container manufacturing method according to any one of claims 1 to 4, wherein the container is a compact container that stores cosmetics as contents. a container body including a body side peripheral wall and a bottom wall that define a storage space for contents;
A container comprising a lid-side peripheral wall and a top wall, and a lid body that is attached to the container body so as to be openable and closable and covers the opening of the storage space,
The container body is
an annular frame forming the main body side peripheral wall ;
a film fixed to the frame to close an opening at one end of the frame to form the bottom wall ;
A portion corresponding to the opening of the frame body is composed only of the film,
The film has residual strain and circular or oval holes ,
and/or
The lid body is
an annular frame forming the lid-side peripheral wall;
a film that is fixed to the frame and closes an opening on one end side of the frame to form the ceiling wall;
A portion corresponding to the opening of the frame body is composed only of the film,
A container characterized in that the film has a residual strain and has circular or oval holes .

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