CN106458387A - Lid structure for container - Google Patents

Abstract

A lid is disclosed for a container having a peripheral wall extending to an upper edge and defining a product containing space. The lid structure (3) comprises a lower frame (8), an upper frame (10) and a lid (12). The lower frame is connected to the upper edge of a tub (2) and defines an access opening giving access to the product containing space. The upper frame is connectable to the lower frame in a snap-fit connection and forms a circumferential first seal therewith. The lid is arranged to close the opening, the lid and the upper frame forming a circumferential second seal. In this manner, an improved sealing connection can be achieved and the upper frame can be manufactured separately from the lower frame and joined thereto at a later stage of the production process.

Description

Lid construction for containers

Background of the invention

field of invention

The present invention relates to containers for packaging and dispensing products, in particular powdered products such as infant nutrition or milk formula. In particular the invention relates to a lid construction for such containers with resealable lids.

Description of related prior art

Powdered materials such as infant formula have been sold in different forms of packaging for many years. Metal cans were initially the preferred container because they were relatively easy and inexpensive to produce and could be sealed for long-term storage. The seal consists of an aluminum foil covering the mouth of the container which is removed upon first use. Because a single container is intended for long-term use, the container has a resealable plastic lid that clips onto the outer rim of the metal can. The container often includes a measuring scoop, either individually wrapped or in the jar itself. But such tanks are relatively heavy, and their production is expensive.

More recently, alternative packaging formats have become available that retrofit existing cans. They consist of a laminated container body and a plastic hinged lid and rim structure which can be glued to the container body. One such package is described in US2008041861 with a seal for initially closing the package and a space between the seal and the upper edge of the container for receiving a scoop in the portion before use. The container part may consist of a laminate of cardboard, metal foil and plastic material. Another similar package is shown in WO2010071424.

After the initial opening of such a package, its sealing is a major concern in the structural design of the lid. Packaging intended for infant formula or other food shall be sufficiently airtight to prevent the entry of small objects or similar animals. A maximum opening of 70 microns has been considered desirable. In other cases, better seals may still be required to prevent moisture ingress. The conflicting requirements of a large opening for easy access of the spoon and a cost effective construction are difficult to reconcile. Specifically, for single-use packages, the volume of material that can be used economically for the construction of the lid limits its strength. A relatively deformable lid is also more difficult to effectively seal against a similarly deformed rim. Existing structures such as that shown in US2008041861 use a lid and rim structure, sometimes called a top container, attached to the free standing rim of the container body. This connection is also critical in container sealing. Another design is shown in WO2008083141 which uses an additional integral gasket to aid in sealing.

A container for holding paint or other liquids is described in US5975346A. The container includes a container body having a bottom wall and a side wall extending from the bottom wall along a perimeter of the bottom wall, terminating in an upper rim. The container also includes a lid and an annular buckle secured to the upper rim, the lid being pivotally and detachably mounted to the annular buckle for movement between an open position and a closed position.

Because of these design requirements and limitations, it is desirable to improve upon existing designs.

Contents of the invention

According to the present invention, there is provided a lid structure for a container having a peripheral wall extending to an upper edge and defining a product containing space, the lid structure comprising: a lower a frame, the lower frame defines a manhole that creates access to the product containing space; an upper frame, which can be connected to the lower frame with a snap connection to form a circumferential first seal; and a cover, which Arranged to close said opening, the cover and upper frame form a circumferential secondary seal. In this way, an improved tight connection can be achieved, and the upper frame can be produced separately from the lower frame and connected to it in a subsequent production method stage.

In a preferred embodiment of the invention, the snap connection is a radially inwardly arranged first seal. This effectively indicates that the snap connection is inside the container in a relatively sealed position. In the case of a snap connection through the lower rim, its sealing is arranged inwards without compromising the overall sealing. This arrangement enables the application of more convenient manufacturing methods, eg in injection molding processes.

Preferably the snap connection is a permanent connection which cannot be disengaged without damaging the container. Alternatively, the snap connection may be releasable so that the upper frame and lid can be removed and reused eg on another package. According to another preferred embodiment, the snap connection comprises a plurality of downwardly extending barbs on the upper frame, the barbs engaging through locating openings in the lower frame.

The first and second seals of the present invention are preferably insect seals. In the following, an insect seal will be defined as a seal which avoids any opening of 70 microns or larger at any point of the seal. Experience in the field of food packaging in tropical climates has established that this value is generally sufficient to avoid the ingress of small insects, which could endanger food hygiene. By providing the first and second seals against insects, such insects can be prevented from entering the interior of the container even after the container is first opened and when powder particles are present around the lid and frame. The first and second seals may also be waterproof, preferably at least 3 cm of water.

Preferably the first seal comprises an upstanding first rim on the lower frame which engages, preferably in an interference fit, in a first downwardly extending groove of the upper frame. The first rim and first groove preferably continue around the entire circumference of the first seal. This type of seal is already significantly superior to single-sided seals. The rim and the groove can be easily formed to have an interference fit, and the above-mentioned insect resistance can be easily achieved. For structures produced by injection molding techniques, their precision depends on the dimensions of the structure to be formed. For grooves with dimensions less than 2mm, a manufacturing tolerance of 3% may be accepted without jeopardizing the seal. In the case of a single sided seal the critical dimension of the structure would be the overall diameter of the opening and for a 10cm diameter opening the same tolerance would yield a dimensional variation of 3mm making an interference fit difficult to assure.

Preferably the second seal further comprises an upstanding second rim on the upper frame which engages, preferably in an interference fit, in a downwardly extending second groove of the lid. The second rim and the second groove preferably continue over the entire circumference of the second seal. This arrangement also benefits from the manufacturing advantages described above and thus enables the desired insect resistance to be easily achieved. As can be appreciated, the orientation of the rim and groove can be reversed without affecting the sealing function. Note, however, that for use in this manner, the downwardly extending grooves are less likely to collect debris.

Most preferably the first and/or second grooves have lead-in formations extending radially on both sides of the respective groove for a distance at least equal to the width of the respective first and second rims . As mentioned above, the manufacturing tolerances of the injection molded part must be taken into account, and while the variation in interference dimensions will be slight, the variation in the position of the groove relative to the rim will be significantly greater. The lead-in structure is arranged to ensure easy access of the rim to the grooves without damaging any of them.

The lid is intended to be opened and closed frequently during use, and for this reason the secondary seal must be strong enough to withstand such use without damage, wear or loss of its insect repellency. In an advantageous embodiment, the introduction structure on the second groove comprises an introduction flange. They can be arranged as vertical buttresses of the second groove, which strengthen the second groove against lateral deformation. It will be appreciated that the defined position of the second groove is important during closure of the lid to ensure proper entry of the second rim. Misalignment of these structures can cause damage to the second rim or second groove, which makes subsequent closure more difficult and prevents the insect seal. In order to fulfill their supporting function, the introduction flanges may be present around the circumference of the second groove, preferably on both sides thereof. They may be present at a spacing of less than 20 mm, preferably less than 15 mm, and in corner regions, may be even more closely spaced. By providing support for the second groove, the walls of the second groove can be made more flexible, thereby better accommodating the second rim. To fulfill their lead-in function, the lead-in flanges may extend downwards beyond the lowest extent of the second groove and be smoothly angled or curved towards such a groove.

The first seal between the upper frame and the lower frame is normally used for one-time assembly, and does not require resealing thereafter. However, the joining of these components can be performed in an automated procedure, followed by fabrication and stress relaxation of the respective components. For this reason, the first groove can also have a similar introduction flange at least on its outer circumference. This will help self-centering of the upper and lower frames during assembly.

According to one embodiment of the invention, the upper frame may have an outer circumferential skirt and the lid may have an outer surface, and the outer surface and skirt are coplanar when the lid is in the closed position. In this sense, coplanarity is not limited to flat planes, and may also include curved planes. As a result of this shape, the cover and upper frame can form a smooth transition without interruption.

According to another aspect of the invention, the upper frame has an outer circumferential skirt and the lower frame has a peripheral surface, the peripheral surface and the skirt being coplanar when the upper and lower frames are joined together. As above, this produces a smooth transition between the upper and lower frames.

The cover can be manufactured as a separate item from the upper rim and can be removed therefrom. Preferably, however, the cover is pivotally connected to the upper frame. In one embodiment, the lid may be arranged to pivot about a hinge located radially inward of the outer circumference of the upper frame. Previous designs have used hinge structures that pivotally connect the cover relative to the rim at a location radially outward from the outer circumference of the rim. Such protruding hinge structures can interfere with stacking and can be unsightly in the final product.

Correct engagement of the second rim into the second groove is important if an easy closure occurs as a result of the pivoting closure of the lid without damaging the second seal. Import structures are important in achieving such closures. To further improve said closing action, the second downwardly extending recess of the lid may have a circumferential inner wall and a circumferential outer wall, wherein the circumferential outer wall extends downwardly a greater distance than the circumferential inner wall in the area adjacent the hinge. The inner wall is therefore not uniform in height around its entire circumference, and will gradually curve downward from either end of the container towards the middle of the rear side of the container. The second flange can also have no introduction flange in this region, which can extend all along the hinge side of the lid. In the absence of a lead-in flange, the inner and outer walls are more capable of flexing when the second rim enters the second groove. By closing the cover, it is the part of the second rim which first engages the second groove, and it does so at a relatively large angle. In one embodiment, the circumferential second seal begins to bond when the lid is at an angle of approximately 20° to the upper frame. The incorporation of the second rim into the second groove is continuous and gradual as the lid is closed. This gradual engagement of the second seal and the frictional engagement between the inner wall and the second rim provides the user with tactile feedback of the sealing action, which is distinctly different from snap-type seals (which provide only at the end of the snap-in engagement). feedback).

According to another advantageous embodiment of the invention, the upper frame can be formed from a material having a different hardness than the lower frame or the cover. In one embodiment, the upper frame is formed from a first plastic material that is relatively softer than a second plastic material used to form the other two components. Relatively stiffer materials for the lower frame and lid can ensure greater overall stiffness of the lid structure. Optionally, the upper frame can be slightly stiffer. Alternatively, all three components may be of different durometers. The variation in hardness may be slight and may be just enough to ensure a good interference seal between the respective seals. Preferred materials for the lid and upper and lower frames are polypropylene (PP), polyethylene (PE) and polyethylene terephthalate (PET) or combinations thereof, although those skilled in the art are familiar with different option, which can provide similar engineered performance.

The lid and upper or lower frame may have suitable catch and closure elements. They can also have a clear closed indication of the tamper. The lower or upper frame may also have a spoon rest and a leveling section. They can extend inwardly into the access hole. It will be understood that the spoon holder may also be provided in the lid.

The invention further relates to a package comprising a lid structure as described above for a container having a peripheral wall extending to an upper edge and defining a product containing space, the lower frame being connected to the upper edge of the container. The package may have a generally square or rectangular outer profile, with rounded corners. The volume of the package may be 0.5L-3L, preferably about 1.5L, and the access hole preferably has a minimum dimension of at least 70mm, more preferably about 100mm and an area of at least ^100cm2 .

Preferably the package includes a septum seal for sealing the product containing space prior to use. The diaphragm seal may contain metal or plastic-metal foil or may be just plastic foil. The diaphragm seal is a hermetic seal. In this context, a hermetic seal is understood to be a seal which substantially prevents the entry of gas into or out of the container during long-term storage. Preferably it is an oxygen barrier seal which prevents the diffusion of oxygen into the container of the seal. The oxygen permeability of the seal may preferably be less than 2.0 cm ³ /m ² /day and more preferably may be less than 0.5 cm ³ /m ² /day. The septum seal may be removed in its entirety prior to use or may comprise a weakened tear line defining an open area, and a pull tab. The septum seal may be provided at different locations, but most preferably the septum seals along the upper edge of the container. In particular, it will be appreciated that thermoformed barrels generally have an outwardly extending flange that forms an upper edge, and that the diaphragm can be sealed along this flange. In an alternative embodiment, the membrane may be sealed to the lower frame to close said opening. In that case, the person skilled in the art will understand that the connection between the lower frame and the upper edge of the container must be a hermetically sealed connection.

In a most preferred embodiment, the container is or comprises a thin walled thermoformed barrel having a wall thickness of less than 0.5mm. By using thin walled thermoformed barrels, the amount of material required to form the container body is limited. Furthermore, the lower frame of relatively thicker plastic material provides the support required for the relatively thinner material of the peripheral walls, allowing efficient connection to the upper frame. In this context, relatively thin is understood by a person skilled in the art to be relative to the frame material. The barrel can be made with a wall thickness sufficient to provide the desired barrier properties and strength. The wall thickness may be about 0.10mm-0.60mm, preferably 0.2-0.40mm. It will be appreciated that the wall thickness may vary across the cross-section, generally being thicker at the rim and thinnest at the side walls. The wall thickness values given above are intended to represent the thickness of the sidewall, which is usually the point of minimum thickness. The lower frame may be significantly thicker, measured in its smallest dimension, and may be of sufficient thickness to ensure a strong mechanical connection with the upper frame. The bucket may be made of any suitable material capable of being thermally deformed. The most suitable material is polypropylene. However, other polymeric materials such as polyethylene terephthalate (PET) or polyethylene (PE) may also be used. It is also possible to use multilayer materials, which are subject to recycling requirements. The lower frame may be permanently attached to the upper edge of the container, preferably by welding.

Advantageously, the packaging consists of a single material type with the aim of recycling. This includes the barrel, upper and lower frames and lid. The diaphragm seal can be the same material, although it is given that it is removed at opening, which can also be recycled separately.

Additionally, the container may further comprise a cardboard sleeve that encloses and supports the thermoformed tub. The cardboard sleeve can fit snugly to the bucket with an interference fit and can provide the peripheral wall with the necessary strength to form stably. In other words, the thin plastic material of the peripheral wall may have sufficient strength alone to adequately retain the shape of the bucket eg when the containers are stacked on top of each other. Improved strength can be achieved by combining it with a cardboard sleeve. The respective layers can be used for recycling respectively. The sleeve may comprise cardboard of 50-400 g/m ² , preferably 100-300 g/m ² . The sleeve may be open at the bottom, but preferably extends under the bottom of the bucket.

According to one embodiment, the package may have a generally square or rectangular outer profile, with rounded corners. The volume of the package may be 0.5L-3L, preferably about 1.5L and the access hole preferably has a minimum dimension of at least 70mm, more preferably about 100mm and an area of at least ^100cm2 . The overall length of the package may be 150mm-250mm, preferably about 185mm. The package may have a width of 100mm-150mm, preferably about 120mm. The package can be used in various heights according to volume requirements, which vary from 80mm-150mm.

The package is particularly adapted to contain a quantity of powdered nutritional product which can be effectively sealed within the product containing space. Preferably the powdered nutritional product comprises infant formula.

A scoop is preferably provided within the package and can be located on the septum seal prior to use. It is also conceivable that the spoon is integrally formed with the lid structure and separates upon first use.

Description of drawings

The features and advantages of the present invention will be further understood by reference to the following drawings of a number of exemplary embodiments in which:

Fig. 1 shows a partially enlarged perspective view of a package of the present invention;

Figure 2 shows a perspective view of the package of Figure 1 with the lid closed;

Figure 3 shows a perspective view of the package of Figure 1 with the lid opened;

Figure 4 shows a partial cross-sectional view of the package of Figure 2 along line IV-IV;

Figures 5a-5c show cross-sectional views similar to Figure 4, during connection of the upper frame; and

Figures 6a-6c show a cross-sectional view along the direction VI-VI of Figure 3 during closure of the lid.

detailed description

Figure 1 shows a partial enlarged view of a package 1 with a lid structure 3 according to a first embodiment of the invention. The package 1 comprises a lid structure 3 comprising a lower frame 8 , an upper frame 10 and a lid 12 and a container in the form of a tub 2 , a sleeve 4 and a septum seal 6 .

Bucket 2 is thermoformed from a relatively thin polypropylene material and has a bottom 14 and a peripheral wall 16 containment space defining a product containment space 20 . The peripheral wall 16 extends over an upper edge 18 which has an outwardly directed flange 19 . The sleeve 4 is formed from cardboard and has a wall 22 and a bottom 24 . The lower frame 8 is an annular ring having an upstanding first sealing rim 48 surrounding the opening 26 which is similar in size to the product containing space 20 . Between the first rim 48 and the opening 26 a positioning opening 46 is arranged, the function of which will be explained further below. The upper frame 10 is also in the form of a loop and has downwardly extending barbs 40 . The lower frame 8 and upper frame 10 are also made of polypropylene, although it will be appreciated that other suitable materials could be used. The membrane 6 includes a tab 32 and includes a tear line 28 which defines an open area 30 .

FIG. 2 shows a perspective view of the package 1 of FIG. 1 in an assembled state with the lid 12 closed. A catch 36 on the front edge of the lid 12 engages a rib 38 on the upper frame 10 to hold the lid 12 closed. The cover 12 and upper rim 10 are also made of polypropylene.

FIG. 3 shows a perspective view of the package 1 of FIG. 1 in an assembled state with the lid 12 open and the membrane removed to provide access to the product containing space 20 . The spoon 42 is retained within the lid 12 by a clip 44 and may also be located in a spoon holder 50 integrally formed with the lower frame 8 . Also visible is a hinge 11 enabling a pivotable connection between the lid 12 and the upper frame 10 .

FIG. 4 is a perspective cross-section along line IV-IV of FIG. 2 . As can be seen, the membrane 6 is attached along the flange 19 of the tub 2 and clamps the lower frame 8 (which overlies the flange 19). The flange 19, diaphragm 6 and lower frame 8 are all welded together to form a single relatively rigid rim structure. The upper frame 10 is mechanically coupled to the lower frame 8 by downwardly extending barbs 40 connected through positioning openings 46 of the lower frame 8 . As can also be seen in this figure, the sleeve 4 fits snugly against the peripheral wall 16 of the bucket 2, extending upwardly below the flange 19 to provide additional support. This allows the upper rim 10 to snap into the lower rim 8 without causing deformation or collapse of the tub 2 .

According to an important aspect of the invention, the cover structure 3 has two seals. A circumferential first seal is formed by an upstanding first sealing rim 48 which joins a downwardly extending first groove 54 on the underside of the upper frame 10 . A circumferential second seal is formed by an upstanding second sealing rim 56 on the upper side of the upper frame 10 , which joins a downwardly extending second groove 58 on the underside of the lid 12 . Lead-in meshes 60, 62 are located on either side of the first groove 54 and the second groove 58, respectively.

Figures 5a-5c show a cross-section at the position of Figure 4 during the connection of the upper frame 10 to the lower frame 8. FIG. 4 a shows the upper frame 10 entering initial engagement with the lower frame 8 . The introduction web 60 of the first groove 54 engages against the upstanding first rim 48 and guides it towards the first groove 54 . The barb 40 has entered into the positioning opening 46 .

In FIG. 5 b the upper frame 10 has been pressed down onto the lower frame 8 . This can be done by pressing onto the cover 12 . According to an important design consideration, the force F is exerted against the upper frame 10 through the lead-in web 62 of the cover 12 by pressing on the cover 12 . In this way, additional pressure or deeper binding of the second rim 56 into the second groove 58 is avoided. When the upper frame 10 is depressed, the first rim 48 enters the first groove 54 and the barb 40 bends into the positioning opening 46 .

FIG. 5 c shows the upper frame 10 fully integrated with the lower frame 8 and with the barbs 40 locked into the positioning openings 46 . At this stage, it is not possible to remove the upper rim 10 without applying considerable force and breaking the package. Note that the barbs 40 protrude into the interior of the bucket 2 and are therefore not accessible from outside the package 1 . Note also that in the fully assembled position, the first rim 48 does not bottom out in the first groove 54 . This ensures that the barbs 40 will not prevent the connection due to manufacturing tolerances.

In this figure, it can also be seen that the upper frame 10 has an outer circumferential skirt 66 and the cover 12 has an outer surface 64 . Outer surface 64 and skirt 66 are coplanar when lid 12 is in the closed position. In other words, both the cover 12 and the upper frame 10 have outer surfaces that are smoothly curved together at this location. Furthermore, the lower frame 8 has a peripheral surface 68, and the peripheral surface 68 and the skirt 66 are also coplanar when the upper frame 10 and the lower frame 8 are joined together, as shown in Fig. 5c.

Figures 6a-6c show cross-sections in the direction VI-VI of Figure 3 with the lid 12 at different stages of closing onto the upper frame 10. In FIG. 6 a the lid 12 is in an open position supported by the hinge 11 . As can be seen, the position of the hinge 11 is at a radially inward position relative to the skirt 66 of the upper frame 10 . This means that when the packages 1 are stacked next to each other, the hinges 11 do not protrude outwards and prevent closing the stack. It's also less likely to accidentally get stuck or get in the way. Note also that in this position, there is no lead-in flange 62 supporting the second groove 58 and the inner wall 58A is longer than the outer wall 58B of the second groove 58 .

FIG. 6 b shows the lid 12 in a partially closed position with the upstanding second rim 56 engaged with the inner wall 58A of the second recess 58 . This contact occurs while the cover 12 is still at an angle of approximately 20° relative to the upper frame 10 . The downward extension of the inner wall 58A beyond the outer wall 58B ensures that the second rim 56 is guided into the second groove 58 . In this case, the extended inner wall 58A acts as a lead-in structure, and for this reason no lead-in flange 62 is required in this region. Indeed, the absence of lead-in flange 62 makes it easier for inner wall 58A to flex when the angle between cover 12 and upper frame 10 changes. Furthermore, the annular engagement when closing the lid 12 prevents the second rim 56 from entering the second groove 58 in a linear manner. The lead-in web 62 on the lid 12 helps guide this angled entry, which ensures a progressive engagement of the second rim 56 into the second groove 58 starting from the rear edge of the lid 12 adjacent the hinge 11 , and step around the circumference to the front edge of the lid 12 adjacent the grip 36 . In addition to helping guide the second rim 56 into the second groove 58, the guide web 62 also supports the second groove 58 and helps maintain its position. Because of the additional support provided by the lead-in mesh 62, the structure forming the second groove 58 can be made more flexible, which makes the closing action softer. Manufacturing tolerances for the location of these features depend on the overall size of the opening 26, as described above.

FIG. 6c shows the lid 12 in the closed position with the upstanding second rim 56 engaging the second groove 58 . As already described above, the full engagement of the second rim 56 in the second groove 58 is avoided, and the closed position of the lid 12 is by introducing the web 62 adjacent the upper frame 10 and the outer surface 64 in engagement on the skirt 66 to decide.

Accordingly, the invention has been described with reference to certain embodiments described above. It will be recognized that many changes in addition to those described above may be made in the structures and techniques described herein without departing from the spirit and scope of the invention. Accordingly, while specific embodiments have been described, these have been done by way of example only, and are not limiting on the scope of the inventions.

Claims (21)

1. the cap structure for container, this container has the peripheral wall extending to top edge, and defines that product holds Receiving space, this cap structure comprises：

For being connected to the underframe of the top edge of this container, this underframe defines hand-hole, and this hand-hole creates this product Accommodate the entrance in space；

Upper frame, it can be connected on this underframe to snap connection, to form circumference the first seal；With

Lid, it arranges next close to described opening, and this lid and upper frame combine and form circumference the second seal.

2. cap structure according to claim 1, wherein this snaps connection the first seal being radially-inwardly arrange.

3. the cap structure according to claim 1 or 2, wherein this snaps connection what be included on upper frame multiple downwardly extended Barb, its locating aperture passing through in underframe combines.

4. the cap structure according to aforementioned any one claim, wherein this first seal be included on underframe upright First wheel rim, described first wheel rim combines in first groove downwardly extending of upper frame.

5. the cap structure according to aforementioned any one claim, wherein this second seal be included on upper frame upright Second wheel rim, described second wheel rim combines in second groove downwardly extending of lid.

6. the cap structure according to claim 4 or 5, wherein this first and/or second groove is circumference, and has importing Structure, described guiding structure radially extends a certain distance on the both sides of respective groove, and this distance is at least equal to respective First wheel rim and the width of the second wheel rim.

7. the cap structure according to aforementioned any one claim, wherein this upper frame has excircle skirt section and this lid has Outer surface, this outer surface and skirt section are coplanar when lid is in the close position.

8. the cap structure according to aforementioned any one claim, wherein this upper frame has excircle skirt section and this underframe has Having peripheral surface, when this upper frame and underframe link together, this peripheral surface and skirt section are coplanar.

9. the cap structure according to aforementioned any one claim, wherein this lid is pivotally connected on upper frame.

10. cap structure according to claim 9, wherein this lid is provided to around from the excircle of upper frame radially-inwardly The hinge arranged pivots.

11. cap structures according to claim 9 or 10, wherein when this lid is in relative to upper frame more than the angle of 15 ° When, this second seal starts to combine.

12. cap structures according to any one of claim 9-11, wherein this second seal be included on upper frame straight The second vertical wheel rim, this second wheel rim combines the second groove downwardly extending at the lid with circumferential inner wall and outer circumferential walls In, the distance that wherein this outer circumferential walls downwardly extends is more than the circumferential inner wall in the region adjacent with hinge.

13. according to the cap structure of aforementioned any one claim, and wherein this first seal and the second seal are that insect protected is close Sealing.

14. 1 kinds of packagings, it comprises cap structure and container according to aforementioned any one claim, and this container has and extends to The peripheral wall of top edge and define that product accommodates space, this underframe is connected to the top edge of container.

15. packagings according to claim 14, it comprises diaphragm seal further, holds for sealing described product before use Receive space.

16. according to the packaging of claims 14 or 15, and wherein this container is thin-walled hot forming bucket, and the wall thickness of bucket is 0.1-0.6mm, Preferably 0.2mm-0.4mm.

17. according to the packaging of any one of claim 14-16, and it is made up of single material category, for the mesh recycling 's.

18. according to the packaging of claim 14 or 16, and wherein this container comprises presspahn sleeve encapsulating and supports thin-walled hot forming The presspahn sleeve of bucket.

19. according to the packaging of any one of claim 14-18, and wherein this underframe is permanently connected to the top edge of container, preferably Connected by welding.

20. according to the packaging of any one of claim 14-19, and it comprises to be sealed in further, and that product accommodates in space is a certain amount of Powdered nutrition product.

21. packagings according to claim 20, wherein this powdered nutrition product comprises babies ' formula milk powder.