Sealed containers and their preparation methods, sheet composite materials and container precursors

Abstract

The embodiments of this disclosure relate to a sealed container, a sheet composite material, a container precursor, and a method for preparing the sealed container. The sealed container includes: a top, comprising a top surface and a side surface approximately half the height of the sealed container, and including a first region; and a top adhesive portion connected to the top, wherein the first region and the top adhesive portion are bonded to each other and completely overlap; the sealed container also includes an auxiliary separation component sandwiched between the first region and the top adhesive portion; the sealed container includes a composite layer comprising an inner heat-sealing layer, a support layer, and an outer heat-sealing layer distant from the contents of the sealed container, stacked sequentially; the material of the auxiliary separation component is different from the material of the outer heat-sealing layer; the sealed container also includes a bottom, which maintains a stable state when the bottom is placed on a horizontal or substantially horizontal surface, and the sealed container can stand upright. When the sealed container is heated, its top and the top adhesive portion can separate when the temperature of the sealed container reaches a preset temperature, thereby preventing the sealed container from bursting or its contents from splashing.

Description

Technical Field

[0001] For all purposes, this application is based on and claims priority to Chinese Patent Application No. 202110559783.7, filed on May 21, 2021, entitled "Sealed Container and Method for Preparation Thereof, Sheet Composite Material and Container Precursor," the entire contents of which are incorporated herein by reference. Embodiments of this disclosure relate to a sealed container, a sheet composite material, a container precursor, and a method for preparing the sealed container. Prior Technology

[0002] Food undergoes loading, unloading, transportation, and storage throughout its distribution process. Food packaging plays a protective role and is an essential component of food products. Food packaging prevents biological, chemical, or physical external factors from damaging food products during their journey from the packaging plant to the consumer; in other words, it maintains the stable quality of the food itself. Aesthetically pleasing and practical food packaging designs also attract consumers. These designs not only enhance the convenience of consumption but also contribute to the visual appeal of the packaging, possessing value beyond the food itself. Therefore, the food packaging process is an integral part of the food manufacturing systems engineering.

[0003] For example, food packaging includes containers made of laminated materials, which include an outer polymer layer, a carrier layer of cardboard or paper that provides dimensional stability to the container, an adhesive layer, a barrier layer, and an inner polymer layer. Decorative or printed designs are an important part of food packaging; these designs can include information about the food ingredients and usage instructions to be stored in the laminated container, and can also provide consumers with a visually appealing appearance. Summary of the Invention

[0004] At least one embodiment of this disclosure provides a sealing container, comprising: a top, including a top surface and a side surface approximately half the height of the sealing container, and including a first region; and a top adhesive portion connected to the top, wherein the first region and the top adhesive portion are bonded to each other and completely overlap; the sealing container further includes an auxiliary separation component sandwiched between the first region and the top adhesive portion; the sealing container includes a composite layer comprising an inner heat-sealing layer, a support layer, and an outer heat-sealing layer disposed sequentially away from the contents of the sealing container; the material of the auxiliary separation component is different from the material of the outer heat-sealing layer; the sealing container further includes a bottom, wherein the sealing container remains stable when the bottom is placed on a horizontal or substantially horizontal surface.

[0005] For example, in a sealed container provided in at least one embodiment of this disclosure, a trace line is provided at the location where the top adhesive portion connects to the top, and the top adhesive portion is folded relative to the top along the trace line to a position where the first region and the top adhesive portion are bonded to each other; the auxiliary separation component is configured to be spaced apart from the trace line.

[0006] For example, in a sealed container provided in at least one embodiment of this disclosure, the planar shape of the auxiliary separation component includes a first polygon, the first polygon including a first vertex, the vertex of the first vertex being the point of the auxiliary separation component furthest from the trace line; the planar shape of the top adhesive portion is a second polygon, the second polygon including a second vertex, the vertex of the second vertex being the point of the top adhesive portion furthest from the trace line; the shortest distance from the first polygon to the trace line is a first distance; the shortest distance from the second vertex to the trace line is a second distance; the first distance is greater than or equal to half of the second distance.

[0007] For example, in a sealed container provided in at least one embodiment of this disclosure, the auxiliary separation component includes a plurality of dotted patterns separated from each other and / or the auxiliary separation component includes a grid pattern.

[0008] For example, in a sealed container provided in at least one embodiment of this disclosure, the area of ​​the auxiliary separation component is 5%-80% of the area of ​​the first region.

[0009] For example, in a sealing container provided in at least one embodiment of this disclosure, the sealing container is cylindrical, and the top adhesive portion is disposed on the side surface of the top.

[0010] For example, in a sealing container provided in at least one embodiment of this disclosure, the sealing container includes two oppositely arranged top adhesive portions, and the auxiliary separation component is provided between only one of the top adhesive portions and the first region.

[0011] For example, at least one embodiment of the sealing container provided in this disclosure further includes a top sealing portion and a bottom sealing portion, wherein the sealing strength of the top sealing portion is less than the sealing strength of the bottom sealing portion.

[0012] For example, in a sealed container provided in at least one embodiment of this disclosure, the auxiliary separation component includes ink; the outer surface of the sealed container is provided with a decorative pattern, the decorative pattern having at least one color that is the same as the auxiliary separation component.

[0013] For example, in a sealed container provided in at least one embodiment of this disclosure, the auxiliary separation component includes a first adhesive, the first region and the top adhesive portion are bonded to each other through the first adhesive, and the softening temperature of the first adhesive is 40°C-70°C.

[0014] For example, in a sealed container provided in at least one embodiment of this disclosure, the auxiliary separation component includes a first adhesive, and a second adhesive is sandwiched between the first region and the top adhesive portion. The first region and the top adhesive portion are bonded to each other through the first adhesive and the second adhesive, and the softening temperature of the first adhesive is lower than that of the second adhesive.

[0015] For example, in a sealed container provided in at least one embodiment of this disclosure, when the temperature of the sealed container reaches a first preset temperature, the top adhesive portion is configured to separate from the top; when the temperature of the sealed container reaches a second preset temperature, the sealed container is configured to form a pressure relief opening, the pressure relief opening being configured to connect the interior of the sealed container to the external environment; the first preset temperature is less than or equal to the second preset temperature.

[0016] At least one embodiment of this disclosure also provides a sheet-like composite material, which includes a first surface and a second surface, and includes a first composite region and a second composite region. The first composite region includes a first heat-sealing layer, a support layer, and a second heat-sealing layer sequentially stacked from the first surface to the second surface. The second composite region includes an auxiliary separation component, the first heat-sealing layer, the support layer, and the second heat-sealing layer sequentially stacked from the first surface to the second surface. The material of the auxiliary separation component is different from the material of the first heat-sealing layer. The sheet-like composite material also includes two first boundary edges parallel to the longitudinal direction and two second edges parallel to the transverse direction. The boundary edge, the longitudinal direction and the transverse direction are orthogonal; the sheet composite material further includes a bottom transverse crease line and a top transverse crease line, the bottom transverse crease line and the top transverse crease line dividing the sheet composite material into: a bottom region, which includes a bottom crease pattern; a top region, which includes a top crease pattern; and a middle region, between the bottom transverse crease line and the top transverse crease line, and located between the bottom region and the top region relative to the longitudinal direction; the top transverse crease line includes: a top central portion; at least one top portion, which is disposed on one side of the top central portion and adjacent to one of the first boundary edges; and to The top crease pattern includes at least one top side portion, which is adjacent to one side of the top central portion and extends between the top central portion and the at least one top portion; the top crease pattern includes at least a pair of oblique crease lines, which are skewed relative to both the longitudinal direction and the transverse direction and extend within the top region; wherein the oblique crease line has a first end pointing to one of the second boundary edges and a second end pointing to a continuous line, the continuous line being parallel to the transverse direction and including the top central portion and the at least one top portion of the top transverse crease line; the oblique crease line, together with the at least one top side portion, defines the sheet-like composite. The composite material includes a flap region designed to form at least a portion of a top adhesive portion; wherein the top crease pattern further includes at least a pair of longitudinal crease lines extending within the top region, arranged on opposite sides of the flap region relative to the lateral direction, and together defining a fold line; the top region includes a first region, the flap region being connected to the top region, wherein the first region and the flap region are configured to be adhesive to each other and to completely overlap, and at least one of the first region and the flap region is provided with an auxiliary separation component, and the flap region and / or the first region provided with the auxiliary separation component corresponds to the second composite region.

[0017] For example, in at least one embodiment of the sheet composite material provided in this disclosure, in the first composite region, a decorative pattern is provided on the side of the first heat-sealing layer away from the second heat-sealing layer, and the decorative pattern has at least one color that is the same as the auxiliary separation component.

[0018] At least one embodiment of this disclosure also provides a container precursor comprising: a sheet composite material as described in any of the above embodiments and a longitudinal seam, wherein the longitudinal seam connects two first boundary edges of the sheet composite material to form a container precursor surrounding the periphery.

[0019] For example, in a container precursor provided in at least one embodiment of this disclosure, the auxiliary separation component is exposed to the external environment or the auxiliary separation component is covered by a release film separable from the auxiliary separation component.

[0020] For example, in a container precursor provided in at least one embodiment of this disclosure, the auxiliary separation component includes ink; at least one of the outer surface of the top region and the outer surface of the wing region is provided with a decorative pattern, the decorative pattern having at least one color the same as the auxiliary separation component.

[0021] For example, in the container precursor provided in at least one embodiment of this disclosure, the auxiliary separation component includes a first adhesive, the first adhesive having a softening temperature of 40°C-70°C.

[0022] For example, in a container precursor provided in at least one embodiment of this disclosure, the auxiliary separation component includes a first adhesive, and at least one of the first region and the wing region is further provided with a second adhesive, wherein the softening temperature of the first adhesive is lower than the softening temperature of the second adhesive.

[0023] At least one embodiment of this disclosure also provides a method for preparing a sealing container, the method comprising: providing a top, the top including a top surface and a side surface of approximately half the height of the sealing container to be formed, and including a first region; providing a top adhesive portion connected to the top; and bonding the first region and the top adhesive portion to each other and completely overlapping them; wherein,

[0024] The preparation method further includes: providing an auxiliary separation component sandwiched between the first region and the top adhesive portion, wherein the sealed container to be formed includes a composite layer, the composite layer including an inner heat-sealing layer, a support layer and an outer heat-sealing layer away from the contents of the sealed container to be formed, and the material of the auxiliary separation component is different from the material of the outer heat-sealing layer; the preparation method further includes: providing a bottom, wherein the sealed container remains stable when the bottom is placed on a horizontal or approximately horizontal surface.

[0025] For example, the preparation method provided in at least one embodiment of this disclosure further includes: forming a decorative pattern on the outer surface of the sealed container to be formed, and using ink of at least one color for forming the decorative pattern to form the auxiliary separation component.

[0026] For example, in the preparation method provided in at least one embodiment of this disclosure, providing the auxiliary separation component includes: forming the auxiliary separation component with a first adhesive, wherein the softening temperature of the first adhesive is 40°C-70°C; and the first region and the top adhesive portion are bonded to each other through the first adhesive. Simple Explanation of the Diagram

[0027] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of this disclosure, and are not intended to limit this disclosure.

[0028] Figure 1 is a three-dimensional structural diagram of a sealed container provided in an embodiment of this disclosure; Figure 2 is a schematic diagram of the planar structure of the top and top adhesive portion in Figure 1 after disassembly. Figure 3 is a schematic diagram of the cross-sectional structure along line A-A' in Figure 1; Figure 4 is a schematic planar structure diagram of an auxiliary separation component and a first region according to an embodiment of this disclosure; Figure 5 is a schematic planar structure diagram of an auxiliary separation component and a top adhesive portion according to an embodiment of the present disclosure; Figure 6 is a schematic planar structure diagram of an auxiliary separation component provided in an embodiment of this disclosure; Figure 7 is a schematic diagram of a structure provided in an embodiment of the present disclosure, in which the top adhesive portion and the top portion are separated. Figure 8A is a schematic diagram of the planar structure of the bottom of a sealed container according to an embodiment of the present disclosure; Figure 8A' is a schematic cross-sectional view of the bottom of the sealed container in Figure 8A along line O-O'; Figure 8B is a schematic diagram of the bottom plan structure of another type of sealing container provided in an embodiment of the present disclosure; Figure 8B' is a schematic cross-sectional view of the bottom of the sealed container in Figure 8B along line O-O'; Figure 8C is a schematic diagram of the bottom planar structure of another type of sealed container provided in an embodiment of this disclosure; Figure 8C' is a schematic diagram of the cross-sectional structure of the bottom of the sealed container in Figure 8C along line O-O'; Figure 9A is a schematic diagram of a planar structure of a sheet-like composite material according to an embodiment of this disclosure; Figure 9B is a schematic diagram of the cross-sectional structure obtained by cutting the sheet-like composite material in Figure 9A along line A-A'. Figure 10 is a three-dimensional structural schematic diagram of a container precursor formed using the sheet-like composite material shown in Figure 9A, according to an embodiment of this disclosure. Figure 11 is a three-dimensional structural diagram of a container precursor provided in an embodiment of this disclosure; Figure 12 is a schematic planar structure diagram of a top adhesive portion and an auxiliary separation component provided in an embodiment of this disclosure; Figure 13 is a schematic planar structure diagram of the top adhesive portion and the auxiliary separation component provided in another embodiment of this disclosure; Figure 14 is a three-dimensional structural schematic diagram of a container precursor provided in yet another embodiment of this disclosure; Figure 15 is a flowchart of a method for preparing a sealed container according to an embodiment of this disclosure; Figure 16 is a flowchart of a method for preparing a sealed container according to another embodiment of the present disclosure; Figure 17 is a flowchart of a method for preparing a sealed container according to another embodiment of this disclosure; and Figure 18 is a flowchart of a method for preparing a sealed container according to another embodiment of this disclosure. Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0030] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “top,” and “bottom” are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0031] Microwave ovens offer advantages such as speed, ease of use, high safety, and hygiene for heating food, making them a common choice for food heating. However, due to practical limitations, sometimes it's inconvenient to transfer food to microwave-safe containers, and in some cases, the packaged food needs to be heated directly without opening it. This necessitates the use of microwave-safe materials for food packaging. These microwave-safe materials include non-metallic materials. For example, polyethylene terephthalate (PET) can be used to form the first film layer, and then inorganic metal oxides can be deposited on the first film layer to form the food packaging material, thus replacing the commonly used aluminum as a food packaging material.

[0032] Furthermore, since many different types of food are heated in the same microwave oven—some are heated after their packaging has been opened, and others are heated in open containers—it's inevitable that some odors from the earlier-heated foods will remain in the microwave. If foods to be heated later are also heated with their packaging opened, it will affect the quality of those foods. Alternatively, during the heating process after opening the packaging, the rotation of the support plate in the microwave oven can cause food to spray out, which can contaminate or damage the microwave oven and also result in food waste. Therefore, it is necessary to heat sealed food directly in the microwave oven.

[0033] Because sealed containers are highly airtight and are usually not completely filled with food, some gas may remain inside. Alternatively, heating a sealed container containing liquid food may generate water vapor. Therefore, the residual gas and / or water vapor generated during heating will typically cause the sealed container to expand due to the continued heating process. If the heating process continues and the internal pressure of the sealed container reaches a pressure threshold that would cause it to rupture or its contents to splash out, then the sealed container may rupture or its contents to splash out. Therefore, it is necessary to prevent such rupture or splashing.

[0034] The inventors of this disclosure have noted that by sandwiching an auxiliary separation component between the first region of the top of the sealed container and the top adhesive portion, the adhesive force between the first region of the sealed container and the top adhesive portion can be weakened, making it easier for the top adhesive portion to spring open from the top. This provides a space to alleviate pressure when the contents of the sealed container are heated, preventing the contents from splashing out. Furthermore, the raised flaps also serve as an indicator; when the flaps are raised, it indicates that the heating temperature has reached a threshold, prompting the consumer to stop heating the sealed container and remove it. When the heating time of the sealed container is prolonged, and the temperature of the sealed container reaches a preset temperature, its top and top adhesive portion will separate. As the heating process continues, a pressure relief opening will form in the sealed container, allowing gas (including residual gas from packaging and / or water vapor formed during heating) to escape through the pressure relief opening, reducing the pressure difference inside and outside the sealed container, thereby preventing the sealed container from bursting or the contents from splashing out. Alternatively, an auxiliary separation component sandwiched between the first region at the top of the sealed container and the top adhesive portion can make it easier for consumers to manually pull the top adhesive portion away from the top of the sealed container before microwave heating, thus providing space to alleviate pressure beforehand.

[0035] At least one embodiment of this disclosure provides a sealing container, the sealing container comprising: a top and a top adhesive portion, the top including a top surface and a side surface approximately half the height of the sealing container, and including a first region; the top adhesive portion being connected to the top, wherein the first region and the top adhesive portion are bonded to each other and completely overlap; the sealing container further comprising an auxiliary separation component sandwiched between the first region and the top adhesive portion; the sealing container comprising a composite layer comprising an inner heat-sealing layer, a support layer, and an outer heat-sealing layer disposed sequentially away from the contents of the sealing container; the material of the auxiliary separation component being different from the material of the outer heat-sealing layer; the sealing container further comprising a bottom, the sealing container remaining stable when the bottom is placed on a horizontal or substantially horizontal surface. This auxiliary separation component weakens the adhesive force between the first region at the top and the top bonding portion, so that when the sealed container is heated, the top and the top bonding portion separate when the temperature of the sealed container reaches a preset temperature. Then, as the heating process continues, a pressure relief opening forms in the sealed container, allowing gas in the sealed container to escape through the pressure relief opening, thereby reducing the pressure difference inside and outside the sealed container and preventing the sealed container from bursting or its contents from splashing out. For example, the contents of the sealed container can be a fluid, a solid component containing a certain amount of water, or a solid component without water.

[0036] For example, Figure 1 is a three-dimensional structural schematic diagram of a sealed container according to an embodiment of the present disclosure. As shown in Figure 1, the sealed container 100 includes: a top 101, a top adhesive portion 102, a bottom 107, and an auxiliary separation component (not shown in Figure 1), and the top adhesive portion 102 is connected to the top 101. When the bottom 107 is placed on a horizontal or substantially horizontal surface, the sealed container 100 can remain stable and not tip over.

[0037] For example, in Figure 1, the top 101 includes a top surface and a side surface approximately half the height of the sealed container, and includes a first region that is bonded to and completely overlaps with the top adhesive portion 102, which is located on the side surface of the top 101. In other embodiments, the top adhesive portion 102 may also be located on the top surface of the sealed container 100 and connected to the top 101, which is not limited in the embodiments of this disclosure.

[0038] For example, the outer contour shape of the sealed container 100 shown in Figure 1 is a cuboid. The cuboid sealed container is a brick-shaped box container. The embodiments of this disclosure are not limited to this. The outer contour shape of the sealed container can also be a cylinder, a cube, a polyhedron with more than 6 faces, etc.

[0039] For example, since the top 101 and the top adhesive portion 102 are attached to each other and at least partially overlap, for ease of illustration, the portion shown by the dashed triangle in FIG1 (the dashed line does not consider the segment A-A') is marked as part of the top 101, and the portion shown by the solid triangle MNH is defined as the top adhesive portion 102, and the top adhesive portion 102 is located above the top 101, and the top adhesive portion 102 and the top 101 share a common bottom edge at the connection.

[0040] It should be noted that the top 101 can be all or part of the cross-section DEFG located at the middle position of the entire sealed container. For example, the top 101 can be the upper part of a rectangular side surface of the cuboid in Figure 1; the top 101 can also be all or part of the top surface of the cuboid in Figure 1; the top 101 can also be a part of the upper end of a rectangular side surface of the cuboid in Figure 1; Figure 1 shows a dashed triangle as an example, but the embodiments of this disclosure are not limited to this, and may also include a top sealing portion and a portion near the top sealing portion, but do not include the top adhesive portion 102.

[0041] For example, in some examples, the top adhesive portion 102 can be any part of the cuboid in Figure 1 other than the cylindrical portion, or it can be any polygonal portion in Figure 1 that is attached to one surface of the cuboid and is collinear with the top surface and one side surface; or it can simply refer to the triangular region 102 shown in Figure 1, i.e. the region shown by triangle MNH.

[0042] For example, Figure 1 shows that the planar shape of the top 101 and the planar shape of the top adhesive portion 102 are both triangular. However, the embodiments disclosed herein are not limited to this. The top 101 and the top adhesive portion 102 may have different planar shapes. For example, the planar shapes of the top 101 and the top adhesive portion 102 may be one of the following: pentagon, heptagon, square, rectangle, combination of square and triangle, combination of rectangle and triangle, combination of circle and triangle, combination of ellipse and triangle, zigzag, etc.

[0043] It should be noted that a roughly horizontal plane refers to a plane with an angle of less than 30 degrees to a horizontal plane; a sealed container maintaining a stable state means that when the sealed container is placed on a load-bearing plane that is stationary or rotating on a horizontal plane, the product inside the sealed container will not flow out even if the top of the sealed container is open.

[0044] It should also be noted that the bottom of the sealed container can be a structure where the middle area of ​​the bottom is recessed towards the top, and the outer edge is on the same plane; it can also be a structure where the middle area or the area near the middle of the bottom protrudes away from the top; or it can be a structure where two planes are pressed together, and since the thickness of the pressed plane is very thin, the bottom can be considered to be on the same plane; or it can be a structure where the middle area of ​​the bottom is on the same plane relative to the top, and at least a portion of the edge is recessed towards the top or protrudes away from the top. The embodiments of this disclosure do not limit the specific structure of the bottom, as long as it satisfies the requirement that the sealed container remains stable and does not tip over when the bottom is placed on a horizontal or substantially horizontal surface.

[0045] For example, Figure 2 is a schematic diagram of the planar structure of the top and top adhesive portion after disassembly in Figure 1. As shown in Figure 2, the top 101 includes a first region 103. Combining Figures 1 and 2, the first region 103 and the top adhesive portion 102 are bonded to each other and completely overlap. For example, the adhesive strength between the first region 103 and the top adhesive portion 102 is 2N to 20N. In one example, the first region 103 and the top adhesive portion 102 are bonded to each other to make the sealed container 100 more securely sealed after the contents 111 are filled. In one example, after the sealed container 100 is sealed, the first region 103 and the top adhesive portion 102 are bonded to each other to give the sealed container 100 a generally regular shape.

[0046] It should be noted that the bonding of the first region 103 and the top adhesive portion 102 to each other does not mean that the entire first region 103 is bonded to the entire top adhesive portion 102. It can be that a part of the first region 103 and a part of the top adhesive portion 102 are bonded together. The embodiments of this disclosure do not limit this. It is only necessary to bond the top 101 and the top adhesive portion 102 to each other.

[0047] For example, in Figure 2, the planar shapes of the first region 103 and the top adhesive part 102 are triangles, respectively. The planar shapes of the first region 103 and the top adhesive part 102 can also be pentagons, heptagons, squares, rectangles, combinations of squares and triangles, combinations of rectangles and triangles, combinations of circles and triangles, combinations of ellipses and triangles, etc.

[0048] For example, Figure 3 is a schematic cross-sectional view of the structure along line A-A' in Figure 1. In Figure 3, the thickness of the first region 103 corresponding to the top 101, the thickness of the top adhesive portion 102, and the thickness of the auxiliary separation component 105 are all enlarged, and the thickness ratio of these three components is not limited to the ratio shown in Figure 3. As shown in Figure 3, the auxiliary separation component 105 is sandwiched between the first region 103 and the top adhesive portion 102. The sealed container 100 includes a composite layer, which includes an inner heat-sealing layer, a support layer, and an outer heat-sealing layer away from the contents of the sealed container, stacked sequentially. The material of the auxiliary separation component 105 is different from the material of the outer heat-sealing layer.

[0049] For example, the support layer in this composite layer can be a paper base layer to provide support.

[0050] For example, the materials of the outer heat-sealing layer and the inner heat-sealing layer can be polyolefin.

[0051] For example, polyolefins refer to a class of thermoplastic resins obtained by polymerizing or copolymerizing α-olefins such as ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, and 4-methyl-1-pentene, as well as some cyclic olefins, individually or in combination.

[0052] For example, the polyolefin includes polyethylene or polypropylene. The polyethylene may be, for example, high-density polyethylene (HDPE), medium-density polyethylene (MDPE), low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), very low-density polyethylene (VLDPE), or polyethylene (PE), etc.

[0053] For example, when the surface of the first region 103 in contact with the auxiliary separation component 105 is an outer heat-sealing layer, the material of the auxiliary separation component 105 is different from the material of the surface of the first region 103 in contact with the auxiliary separation component 105; or, when the surface of the top adhesive portion 102 in contact with the auxiliary separation component 105 is an outer heat-sealing layer, the material of the auxiliary separation component 105 is different from the material of the surface of the top adhesive portion 102 in contact with the auxiliary separation component 105; or, when the surface of the first region 103 in contact with the auxiliary separation component 105 is an outer heat-sealing layer, and the surface of the top adhesive portion 102 in contact with the auxiliary separation component 105 is an outer heat-sealing layer, the material of the auxiliary separation component 105 is different from the material of the surface of the first region 103 in contact with the auxiliary separation component 105 and different from the material of the surface of the top adhesive portion 102 in contact with the auxiliary separation component 105. In this case, the auxiliary separation component 105 can be provided independently and flexibly, which helps to conveniently realize the sealed container according to the embodiments of this disclosure.

[0054] For example, the material of the surface of the first region 103 that contacts the auxiliary separation component 105 and the material of the surface of the top adhesive portion 102 that contacts the auxiliary separation component 105 may be the same or different.

[0055] For example, as shown in Figures 1 and 2, a trace line 106 is provided at the location where the top adhesive portion 102 connects to the top 101. Along the trace line 106, the top adhesive portion 102 is folded relative to the top 101 until the first region 103 and the top adhesive portion 102 are bonded together. As shown in Figure 1, the trace line 106 is a straight line, and the corresponding planar shape of the top adhesive portion 102 can be a triangle, a rectangle, etc. Depending on the shape of the sealed container, the trace line 106 can also be an arc, and the corresponding planar shape of the top adhesive portion 104 can be a fan shape, a semi-circle, or an ellipse, etc.

[0056] For example, the top adhesive portion 102 may be a wing of the sealing container 100, which may be located in the top region of the sealing container and connected to the top 101 of the sealing container.

[0057] For example, Figure 4 is a schematic diagram of the planar structure of an auxiliary separation component and a first region according to an embodiment of this disclosure. As shown in Figure 4, the auxiliary separation component 105 is spaced apart from the trace line 106, that is, the auxiliary separation component 105 is located in the region of the first region 103 away from the trace line 106, and the auxiliary separation component 105 is located at the endpoint of the first region 103 furthest from the trace line 106 and its adjacent region. Placing the auxiliary separation component 105 in the region of the first region 103 away from the trace line 106 can weaken the adhesion of the edge region, thereby making it easier for the top 101 and the top adhesive portion 102 to separate at the edge portion first during the heating process.

[0058] For example, Figure 5 is a schematic planar structure diagram of an auxiliary separation component and a top adhesive portion according to an embodiment of this disclosure. As shown in Figure 5, the auxiliary separation component 105 is spaced apart from the trace line 106, that is, the auxiliary separation component 105 is located in the region of the top adhesive portion 102 away from the trace line 106, and the auxiliary separation component 105 is located at the endpoint of the top adhesive portion 102 furthest from the trace line 106 and its adjacent region. Placing the auxiliary separation component 105 in the region of the top adhesive portion 102 away from the trace line 106 can weaken the bonding ability of the edge region, thereby making it easier for the top 101 and the top adhesive portion 102 to separate at the edge portion first during heating.

[0059] It should be noted that the area of the first region 103 away from the trace line 106 refers to the region of the first region 103 that is not adjacent to the trace line 106, or the position of the endpoint of the first region 103 that is farthest from the trace line 106 and the region adjacent to this endpoint; the area of the top bonding part 102 away from the trace line 106 refers to the region of the top bonding part 102 that is not adjacent to the trace line 106, or the position of the endpoint of the top bonding part 102 that is farthest from the trace line 106 and the region adjacent to this endpoint.

[0060] For example, the planar shape of the auxiliary separation component 105 includes a first polygon. For example, the first polygon can be a triangle, a rhombus, a pentagon, a heptagon, a combination of a square and a triangle, a combination of a rectangle and a triangle, a combination of a circle and a triangle, a combination of an ellipse and a triangle, or a zigzag shape, etc.

[0061] For example, FIG. 5 illustrates with the first polygon being a triangle as an example. The first polygon ABC includes a first vertex angle <ABC, and the vertex B (the first vertex) of the first vertex angle <ABC is the point of the auxiliary separation component 105 that is farthest from the trace line 106.

[0062] For example, as shown in FIG. 5, the planar shape of the top bonding part 102 is a second polygon. For example, the second polygon can be a triangle, a rhombus, a pentagon, a heptagon, a combination of a square and a triangle, a combination of a rectangle and a triangle, a combination of a circle and a triangle, a combination of an ellipse and a triangle, or a zigzag shape, etc.

[0063] [[ID=)18]]For example, FIG. 5 illustrates with the second polygon being a triangle as an example. The second polygon A'B'C' includes a second vertex angle <A'B'C', and the vertex B' (the second vertex) of the second vertex angle <A'B'C' is the point of the top bonding part 102 that is farthest from the trace line 106, and the first vertex angle <ABC coincides with the second vertex angle <A'B'C'. For example, relative to the case where the lines coincide at the edge, setting the endpoint B of the auxiliary separation component 105 that is farthest from the trace line 106 to coincide with the endpoint B' of the top bonding part 102 that is farthest from the trace line 106 can weaken the bonding ability of the edge part at the endpoint position, so that during the heating process, the top 101 and the top bonding part 102 are more likely to separate first at the endpoint B' position of the edge part of the top bonding part 102, so that the endpoint B' of the top bonding part 102 is more likely to warp. Due to the action of the tensile stress, it is easier for the top bonding part 102 to gradually separate from the top 101 from the endpoint B' position towards the position close to the trace line 106.

[0064] For example, as shown in FIG. 5, the shortest distance from the first polygon ABC to the trace line 106 is the first distance d1, and the shortest distances from the first vertex B and the second vertex B' to the trace line 106 are the second distance d2. The first distance d1 is greater than or equal to half of the second distance d2. That is, FIG. 5 shows that d1 is greater than half of the second distance d2. For example, the distance magnitude relationship that the first distance d1 is greater than or equal to half of the second distance d2 can ensure that the auxiliary separation component 105 is disposed in the half-region or the small half-region of the top bonding portion 102 away from the trace line 106 (i.e., all or part of the upper half-region of the top bonding portion 104 shown in FIG. 5), so that the top 101 and the top bonding portion 102 are more likely to be separated in the region away from the trace line 106. And in the case where both the first polygon ABC and the second polygon A'B'C' are isosceles triangles, the area of the auxiliary separation component 105 can be made less than or equal to half of the area of the top bonding portion 102, and it can also ensure a sufficient bonding area between the first region 103 and the top bonding portion 102 to ensure the sealing performance of the sealed container 100.

[0065] For example, as shown in FIG. 5, the side AC of the first polygon ABC opposite to the first apex angle <ABC is the first base, and the first base AC is parallel to the trace line 106. The side of the second polygon A'B'C' opposite to the second apex angle <A'B'C' is the second base A'C', and the second base A'C' is parallel to the trace line 106 and does not coincide with the trace line 106. The base of the top bonding portion 102 coincides with the trace line 106.

[0066] For example, Figure 6 is a schematic planar structure of an auxiliary separation component provided in an embodiment of this disclosure. As shown in Figure 6(a), the auxiliary separation component 105 includes a grid pattern; or, as shown in Figure 6(b), the auxiliary separation component 105 includes multiple dot patterns separated from each other; or, as shown in Figure 6(c), the auxiliary separation component 105 includes a combination of multiple dot patterns and grid patterns separated from each other. Referring to Figures 1 and 2, when any of the auxiliary separation components 105 shown in Figures 6(a) to 6(c) are used in the sealed container 100, the adhesive force between the first region 103 and the top adhesive portion 102 can be uniformly reduced, and sufficient and uniform adhesive force between the first region 103 and the top adhesive portion 102 can be ensured. For example, when the entire top bonding portion 102 is provided with the above-mentioned auxiliary separation component 105, and the heating temperature of the sealed container 100 reaches the preset temperature, the top 101 and the top bonding portion 102 will quickly separate, thereby accelerating the speed of forming the pressure relief opening when it is required to form a pressure relief opening, so that the gas in the sealed container can be released in time. In addition, the structural design shown in Figures 6(a) to 6(c) can also ensure the uniformity of the structure and material of each part of the auxiliary separation component 105.

[0067] For example, in one example, the area of ​​the auxiliary separation component 105 is 5%-80% of the area of ​​one of the first region 103 and the top adhesive portion 102. For example, the area of ​​the auxiliary separation component 105 is 5%-80% of the area of ​​the first region 103, for example, the area of ​​the auxiliary separation component 105 is 5%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, or 80% of the area of ​​the first region 103. For example, the area of ​​the auxiliary separation component 105 is 5%-80% of the area of ​​the top adhesive portion 102, for example, the area of ​​the auxiliary separation component 105 is 5%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, or 80% of the area of ​​the top adhesive portion 102.

[0068] For example, in one example, as shown in Figure 1, the sealed container 100 is cylindrical, and the top adhesive portion 102 is provided on the side surface of the top 101. The cylindrical portion of the sealed container 100 is a quadrangular prism with an outer contour of a cuboid.

[0069] For example, when the sealed container 100 is heated, when the temperature of the sealed container 100 reaches a first preset temperature, the top adhesive portion 102 is configured to separate from the top 101. For example, FIG7 is a schematic diagram of the top adhesive portion and the top being separated according to an embodiment of the present disclosure. As shown in FIG7, the top adhesive portion 102 is a flap. The portion of the top adhesive portion 102 furthest from the trace line 106 first separates from the top 101. Then, with further heating, the top adhesive portion 102 gradually lifts up until the top adhesive portion 102 separates from the top 101 and is only connected at the trace line 106, thus forming the state diagram shown in FIG7.

[0070] For example, as shown in Figure 7, a top adhesive portion 102 is provided on the side surface of the top 101, and top adhesive portions 102 are provided on both side surfaces of the top 101 (one of which is not shown due to obstruction). That is, the sealed container 100 includes two top adhesive portions 102, of which only one top adhesive portion 102 is separated from the top 101, and an auxiliary separation component 105 is provided only on this one top adhesive portion 102. Compared to the case where the auxiliary separation component 105 is provided on both top adhesive portions 102, providing the auxiliary separation component 105 on only one top adhesive portion 102 is more conducive to forming a pressure relief opening at the top seal, thereby facilitating the subsequent pressure relief process.

[0071] It should be noted that, alternatively, both top adhesive portions 102 located on either side of the top of the sealed container 100 may be separated from the top 101.

[0072] For example, the sealed container 100 may also include a bottom and a bottom adhesive portion, which are connected to the bottom, and no auxiliary separation component is provided on the bottom adhesive portion. The positional relationship between the bottom and the bottom adhesive portion can be referred to the above-described connection relationship between the top and the top adhesive portion, and will not be repeated here.

[0073] For example, the sealed container 100 also includes a top seal and a bottom seal, the top seal having a lower sealing strength than the bottom seal, such that when a pressure relief opening is required, the pressure relief opening is formed in the top seal.

[0074] For example, in one example, the auxiliary separation component 105 includes ink, and the outer surface of the sealed container 100 is provided with a decorative pattern 108, and the decorative pattern 108 has at least one color that is the same as the auxiliary separation component 105. That is, the decorative pattern 108 may be provided only on the outer surface of the top 101, or only on the outer surface of the top adhesive portion 102, or both the outer surface of the top 101 and the outer surface of the top adhesive portion 102 may be provided with the decorative pattern 108.

[0075] For example, as shown in Figure 7, a decorative pattern 108 is provided on the outer surface of the top 101. This decorative pattern 108 has at least one color that is the same as the auxiliary separating component 105. For example, both the decorative pattern 108 and the auxiliary separating component 105 are formed using red ink, or both are formed using green ink. Since the decorative pattern 108 and the auxiliary separating component 105 are formed using the same material and in the same process step, the formation of the auxiliary separating component 105 can be achieved without increasing the types of raw materials or the number of process steps, thereby saving production costs. Furthermore, since different raw materials require different equipment or components for application, using the same material and forming the decorative pattern 108 and the auxiliary separating component 105 in the same process step also saves equipment costs.

[0076] For example, different colored inks can be printed onto the outer surface of the top 101 using flexographic printing. After each printing step is completed, the applied ink is dried to form a decorative pattern 108. For example, one color of ink can be printed onto the first area 103 of the top 101, and after the ink is dried, an auxiliary separation component 105 can be formed.

[0077] For example, if the auxiliary separation component 105 includes ink, a decorative pattern 108 may also be provided on the outer surface of the top adhesive portion 102, and the decorative pattern 108 on the top adhesive portion 102 and the auxiliary separation component 105 are disposed on the same layer, and the decorative pattern 108 on the top adhesive portion 102 has at least one color that is the same as that of the auxiliary separation component. For the above description of the scheme in which the decorative pattern 108 on the top 101 and the auxiliary separation component 105 are disposed on the same layer and have at least one color that is the same as that of the auxiliary separation component 105, it will not be repeated here.

[0078] For example, in the case where the auxiliary separating component 105 includes ink, and at least one of the outer surfaces of the top 101 and the top adhesive portion 102 is provided with a decorative pattern 108, and the decorative pattern 108 has at least one color that is the same as the auxiliary separating component 105, an adhesive is also sandwiched between the first region 103 and the top adhesive portion 102 to bond the first region 103 and the top adhesive portion 102 to each other. This adhesive may or may not overlap with the auxiliary separating component 105; for example, the adhesive may partially overlap with the auxiliary separating component 105. For example, the adhesive may be ordinary glue. This adhesive can ensure the reliability of the bond between the first region 103 and the top adhesive portion 102.

[0079] It should be noted that the outer surface of the top 101 refers to the surface of the top 101 exposed to the environment, and the outer surface of the top adhesive portion 102 refers to the surface of the top adhesive portion 102 exposed to the environment, or it can refer to the surface of the top 101 and the top adhesive portion 102 exposed to the environment before they are bonded or after they are separated.

[0080] For example, in another example, the auxiliary separation component 105 includes a first adhesive that bonds the first region 103 and the top adhesive portion 102 to each other, and the first adhesive has a softening temperature of 40°C-70°C after curing. Further, the first adhesive has a softening temperature of 55°C-65°C after curing.

[0081] For example, the first adhesive is a commercially available Dow brand silicone pressure-sensitive adhesive, model DOWSIL™ 7657, and the external pressure applied when the first adhesive bonds the first region 103 and the top adhesive portion 102 is 2.5 x 10⁴ Pa.

[0082] For example, when the softening temperature of the first adhesive after curing is below 40°C, the adhesive force between the top 101 and the top adhesive portion 102 is poor, and the top 101 and the top adhesive portion 102 can easily separate even without heating, thus affecting the quality of the sealed container. When the softening temperature of the first adhesive after curing is above 70°C, the top 101 and the top adhesive portion 102 are difficult to separate even under heating conditions, and no pressure relief opening will be formed, which can easily cause the sealed container 100 to crack or its contents to splash during heating.

[0083] For example, in another example, the auxiliary separation component 105 includes a first adhesive, and a second adhesive is sandwiched between the first region 103 and the top adhesive portion 102. The first region 103 and the top adhesive portion 102 are bonded to each other through the first adhesive and the second adhesive, and the softening temperature of the first adhesive after curing is lower than the softening temperature of the second adhesive after curing.

[0084] For example, the combined bonding effect of the first region 103 and the top adhesive portion 102 ensures the stability of the bond between the top 101 and the top adhesive portion 102, allowing the sealed container 100 to maintain a stable seal during transportation, transfer, or compression, thereby ensuring that the quality of its contents is not damaged. The placement of the first adhesive and the second adhesive between the first region 103 and the top adhesive portion 102, with the softening temperature of the first adhesive after curing being lower than that of the second adhesive, makes it easier for the portion of the first region 103 and the top adhesive portion 102 bonded by the first adhesive to separate from each other. In other words, compared to using only the second adhesive to bond the first region 103 and the top adhesive portion 102 without using the first adhesive, the first adhesive weakens the bonding force between the first region 103 and the top adhesive portion 102.

[0085] For example, the first adhesive is a commercially available Dow brand silicone pressure-sensitive adhesive, model DOWSIL™ 7657, which applies an external pressure of 2.5 x 10⁴ Pa when bonding the first adhesive to the first region 103 and the top adhesive portion 102. The second adhesive can be a common glue.

[0086] For example, when the temperature of the sealed container 100 reaches a second preset temperature, the sealed container 100 is configured to form a pressure relief opening, which is configured to connect the interior of the sealed container 100 to the external environment, so that the gas in the sealed container 100 (including residual gas during packaging and water vapor formed during heating) can be discharged to reduce the pressure difference inside and outside the sealed container 100, thereby preventing the sealed container 100 from bursting or the contents of the sealed container from splashing out.

[0087] For example, the pressure relief opening can be a slit or a through hole of a certain size. For example, the pressure relief opening can be formed in the top sealing area, and the embodiments of this disclosure are not limited to this.

[0088] For example, the first preset temperature is less than or equal to the second preset temperature. The first preset temperature can be 40℃~55℃, specifically 40℃, 45℃, 50℃ or 55℃. The second preset temperature can be 55℃~70℃, specifically 55℃, 60℃, 65℃ or 70℃.

[0089] For example, the sealed container 100 also has a bursting temperature. The first preset temperature and the second preset temperature are both lower than the bursting temperature of the sealed container, so that a pressure relief opening is formed before the sealed container reaches its bursting temperature, thereby reducing the pressure difference between the sealed container and the external environment, preventing the sealed container from exploding or preventing the contents of the sealed container from splashing out.

[0090] For example, Figure 8A is a schematic diagram of the planar structure of the bottom of a sealed container provided in an embodiment of the present disclosure, and Figure 8A' is a schematic diagram of the cross-sectional structure of the bottom of the sealed container in Figure 8A along line O-O'. As shown in Figures 8A and 8A', a portion of the middle area of ​​the bottom 107 of the sealed container is recessed towards the top, and the entire outer peripheral edge is in the same plane. When the bottom of the sealed container is placed on a horizontal or approximately horizontal surface, the sealed container can maintain a stable state.

[0091] For example, Figure 8B is a schematic diagram of the planar structure of the bottom of another sealing container provided in an embodiment of the present disclosure, and Figure 8B' is a schematic diagram of the cross-sectional structure of the bottom of the sealing container in Figure 8B along line O-O'. As shown in Figures 8B and 8B', a portion of the middle area of ​​the bottom 107 is located on the same plane relative to the top, and the portions on opposite sides of the outer peripheral edge have overlapping portions on the side away from the top surface. For example, the planar shape of the overlapping portion is triangular.

[0092] For example, Figure 8C is a schematic diagram of the planar structure of the bottom of another sealing container provided in an embodiment of the present disclosure, and Figure 8C' is a schematic diagram of the cross-sectional structure of the bottom of the sealing container in Figure 8C along the O-O' line. As shown in Figures 8C and 8C', the bottom 107 is formed by pressing two planes together. Since the thickness of the pressing plane is very thin, the thickness of the pressing plane is ignored, and the bottom 107 can be considered as a structure located on the same plane.

[0093] The specific structure of the bottom of the sealed container 100 in the embodiments of this disclosure is not limited to the structure shown in Figures 8A-8C. It can also be other structures with curved surfaces, as long as the sealed container remains stable and does not tip over when the bottom is placed on a horizontal or approximately horizontal surface.

[0094] For example, as shown in Figure 1, the sealed container also includes contents 111, which includes food. Materials that can be considered food are any solid (which may release some gas when heated) or liquid food intended for human consumption, or food intended for animal consumption. For example, the food is liquid at temperatures above 8°C, and this liquid state includes dairy products, soups, sauces, and non-carbonated beverages. Before sealing the food in the sealed container, both the food and the container are sterilized separately, for example, by methods such as hydrogen peroxide sterilization, ultraviolet radiation sterilization, pasteurization, or autoclaving.

[0095] For example, the top surface of the sealed container is provided with a covered hole 110 for accessing the contents, which is achieved by at least partially breaking the covered layer. The covered hole 110 can have any shape, such as a straw or a closure, for example, a lid, to allow the straw to pass through or to protect the covered layer from mechanical damage during transport. For example, the planar shape of the covered hole includes circular, square, rectangular, elliptical, or teardrop-shaped shapes.

[0096] For example, the covering layer can be damaged using an opening aid, such as a straw. For instance, the process of damaging the covering layer includes placing the straw vertically directly above the covering layer and then pushing the straw through the covering layer.

[0097] For example, when performing a horizontal compressive strength test on the sealed container 100, the instrument used is a TIRA 28025 tensile tester.

[0098] For example, the sample preparation stage includes: preparing 30 samples of each type to be tested, and placing the filled sealed containers under standard climatic conditions (23 °C ± 1 °C, 50% ± 5% relative humidity) for at least 24 hours to equilibrate.

[0099] For example, the working principle of the horizontal compression test is as follows: the two top adhesive parts of a prepared sealed container are separated from the top, and then the sealed container is laid flat on the support plate at the bottom of the instrument, that is, the side of the sealed container that is not bonded to the top adhesive parts contacts the support plate. Pressure is applied to the sealed container using the pressure plate at the top of the instrument. As the pressure is applied for a longer and longer time, when the contents of the sealed container leak, the specific location of the leak point in the sealed container is determined, as well as the magnitude of the sealing strength of the sealed container.

[0100] The steps for the horizontal compression test include: turning on the EDC controller and TIRA tensile testing software; selecting a pressure sensor with a range of 1000N for the horizontal compression test; choosing a test result within 20% to 80% of the test range; checking the equipment sensor and the upper pressure plate and lower support plate of the instrument for proper function; placing the sealed container flat on the lower support plate of the instrument, ensuring that the side of the sealed container not bonded to the top adhesive part contacts the support plate; and then performing the test according to the operating steps prompted by the software. During the test, the movement speed of the upper pressure plate is 10mm / min. You can choose to stop the test of this sample when the pressure value of the horizontal compression test decreases by about 30%, and then proceed to the test of the next sample.

[0101] For example, the test conditions can be changed for the next sample test. For instance, the pressure value selected for the horizontal compressive strength test can be reduced by about 30%, or the clamp can be moved downwards or the time of pressure application can be changed.

[0102] For example, tests can be conducted by providing auxiliary separation components at the locations corresponding to both top adhesive portions of the sealed container, or by not providing auxiliary separation components on the sealed container, or by providing auxiliary separation components only in the area corresponding to one top adhesive portion of the sealed container.

[0103] Test results revealed that leaks ultimately occurred on the top surface of the sealed container. This is likely because the sealing strength of the top surface is weaker than that of the bottom surface. Furthermore, the bottom is typically activated with hot air before sealing, while the top is activated using ultrasound; the activation methods for the top and bottom are different. The sealing structures for the top and bottom also differ. The top usually uses a folded top adhesive section for sealing (i.e., it has lugs), while the bottom uses two superimposed planes for sealing (it does not have lugs).

[0104] For example, each sample can also be tested for the pressure relief ratio based on 50 samples. By adjusting the width of the top seal and the heating time, the number of samples that experienced pressure relief can be obtained, and then the percentage of pressure relief can be calculated.

[0105] For example, take 50 samples each of two types, A and B. No auxiliary separation components are placed between the top adhesive portion and the top of samples A and B. Set the width of the top adhesive portion of sample A to 1.0 mm and the heating time to 110 min. Set the width of the top adhesive portion of sample B to 1.5 mm and the heating time to 111 min. It was found that 30 samples of sample A experienced pressure loss, meaning the proportion of samples experiencing pressure loss in sample A was 60%. Similarly, 40 samples of sample B experienced pressure loss, meaning the proportion of samples experiencing pressure loss in sample B was 80%.

[0106] Then, 50 samples each of samples A and B were taken. An auxiliary separation component was placed between the top adhesive portion and the top of sample A. The width of the top adhesive portion of sample A was set to 1.0 mm, and the heating time was set to 107 minutes. It was found that 50 samples of sample A experienced pressure loss, meaning the pressure loss rate in sample A was 100%. Similarly, an auxiliary separation component was placed between the top adhesive portion and the top of sample B. The width of the top adhesive portion of sample B was set to 1.5 mm, and the heating time was set to 107 minutes. It was found that 50 samples of sample B experienced pressure loss, meaning the pressure loss rate in sample A was also 100%.

[0107] Test results showed that, under the same conditions, pressure relief was more likely to occur when an auxiliary separation component was placed between one top adhesive part and the top, compared to the case where auxiliary separation components were placed between two top adhesive parts and the top.

[0108] In summary, the sealing container provided by the above embodiments of this disclosure reduces the adhesive force between the top and the top adhesive portion, so that when the temperature of the sealing container reaches a first preset temperature during heating, the top and the top adhesive portion separate, and then the sealing container forms a pressure relief opening to allow the gas in the sealing container to be discharged, thereby reducing the pressure difference inside and outside the sealing container, thereby preventing the sealing container from bursting or the contents from splashing.

[0109] For example, at least one embodiment of this disclosure also provides a sheet-like composite material, which includes a first surface and a second surface, and includes a first composite region and a second composite region. The first composite region includes a first heat-sealing layer, a support layer, and a second heat-sealing layer sequentially stacked from the first surface to the second surface. The second composite region includes an auxiliary separation component, a first heat-sealing layer, a support layer, and a second heat-sealing layer sequentially stacked from the first surface to the second surface. The material of the auxiliary separation component is different from the material of the first heat-sealing layer. The sheet-like composite material also includes two first boundary edges parallel to the longitudinal direction and two second boundary edges parallel to the transverse direction, the longitudinal and transverse directions being orthogonal. The sheet-like composite material also includes a bottom transverse crease line and a top transverse crease line, which divide the sheet-like composite material into: a bottom region including a bottom crease pattern; a top region including a top crease pattern; and a middle region located between the bottom transverse crease line and the top transverse crease line, and situated between the bottom region and the top region relative to the longitudinal direction. The top transverse crease line includes: a top central portion; and at least one top portion disposed on one side of the top central portion and adjacent to the first boundary edge. One of the top crease patterns; and at least one top side portion, which is adjacent to one side of the top central portion and extends between the top central portion and at least one top portion; the top crease pattern includes at least a pair of inclined crease lines, which are skewed relative to both the longitudinal and transverse directions and extend within the top region; wherein the inclined crease lines have a first end pointing to one of the second boundary edges and a second end pointing to a continuous line, the continuous line being parallel to the transverse direction and including a top central portion and at least one top portion of the top transverse crease line; the inclined crease lines together with at least one top side portion define a flap region of the sheet composite material, the flap region being designed to form at least a portion of the top adhesive portion; wherein the top crease pattern also includes at least a pair of longitudinal crease lines extending within the top region, arranged on opposite sides of the flap region relative to the transverse direction, and together defining a fold line; the top region includes a first region, the flap region being connected to the top region, wherein the first region and the flap region are configured to be adhesive to each other and to fully overlap, and an auxiliary separation member is provided in at least one of the first region and the flap region, and the flap region and / or the first region provided with the auxiliary separation member corresponds to a second composite region.

[0110] For example, Figure 9A is a schematic diagram of the planar structure of a sheet composite material provided in an embodiment of the present disclosure, and Figure 9B is a schematic diagram of the cross-sectional structure obtained by cutting the sheet composite material in Figure 9A along line A-A'. As shown in Figures 9A and 9B, the basic unit of the sheet composite material 01 is a rectangular structure, which includes a first surface 02 and a second surface 03, and includes a first composite region 04 and a second composite region 05. The first composite region 04 includes a first heat-sealing layer 06, a support layer 07 and a second heat-sealing layer 08 stacked sequentially from the first surface 02 to the second surface 03. The second composite region 05 includes an auxiliary separation component 09, a first heat-sealing layer 06, a support layer 07 and a second heat-sealing layer 08 stacked sequentially from the first surface 02 to the second surface 03, and the material of the auxiliary separation component 09 is different from the material of the first heat-sealing layer 06.

[0111] For example, the support layer 07 is a rigid base layer, such as a paper base layer.

[0112] For example, the sheet-like composite material 01 also includes two first boundary edges (011, 012) parallel to the longitudinal direction (the extension direction of the y-axis) and two second boundary edges (013, 014) parallel to the transverse direction (the extension direction of the x-axis), with the longitudinal direction (the extension direction of the y-axis) and the transverse direction (the extension direction of the x-axis) being orthogonal.

[0113] For example, the longitudinal direction (the direction of the extension of the y-axis) is the direction of the total height of the subsequently formed container precursor. "Total height" refers to the height of the container precursor when it has a constant height or the maximum height of the container precursor when it has a variable height.

[0114] For example, the sheet composite material 01 also includes a bottom transverse crease line 015 and a top transverse crease line 016, which divide the sheet composite material 01 into: a bottom region 017, which includes a bottom crease pattern 018; a top region 019, which includes a top crease pattern 021; and a middle region 022, located between the bottom transverse crease line 015 and the top transverse crease line 016, and situated between the bottom region 017 and the top region 019 relative to the longitudinal direction (the direction of extension of the y-axis); the top transverse crease line 016 includes: a top central portion 016a; and at least one top portion 016b, which is disposed on one side of the top central portion 016a and adjacent to the first boundary edge (011, 01). One of 2); and at least one top side portion 016c, which is adjacent to one side of the top central portion 016a and extends between the top central portion 016a and at least one top portion 016b; the top crease pattern 021 includes at least a pair of inclined crease lines (026a, 026b) that are skewed relative to both the longitudinal direction (the direction of extension of the y-axis) and the transverse direction (the direction of extension of the x-axis) and extend within the top region 019; wherein the inclined crease line has a first end pointing to the second boundary edge 013 and a second end pointing to the continuous line C-C', the continuous line C-C' being parallel to the transverse direction (the direction of extension of the x-axis) and including the top central portion 016a and at least one top portion 016b of the top transverse crease line 016.

[0115] For example, the top region 019 includes a top crease pattern 021 and is configured as a top portion of the container precursor, the top portion including a top plate, which is a flat and horizontal top plate with a quadrilateral profile, or a sloping top plate.

[0116] For example, the intermediate region 022 is designed to form the main part of the container precursor with multiple sidewalls.

[0117] For example, the bottom region 017 includes a bottom crease pattern 018 and is configured as a bottom portion of the container precursor, the bottom portion including a base plate that is a flat and horizontal base plate having a quadrilateral profile and defining a resting surface of the container precursor.

[0118] For example, the top transverse crease line 016 extends parallel to the second boundary edge (013, 014), the top transverse crease line 016 is arranged closer to the top boundary edge (second boundary edge 013) than the bottom transverse crease line 015, and is configured to define the top peripheral edge of the container precursor that separates the main part from the top part.

[0119] For example, the top transverse crease line 016 includes a top central portion 016a configured to define the top front edge of the container front; two top portions 016b arranged on opposite sides of the top central portion 016a, located near the respective first boundary edges (011, 012) and configured to define the top rear edge of the container front; and two top side portions 016c extending adjacent to the opposite sides of the top central portion 016a, each top side portion 016c connecting the top central portion 016a to a respective top portion 016b and designed to define two respective top edges of the container front.

[0120] For example, the bottom lateral crease line 015 extends parallel to the second boundary edge (013, 014) and is arranged closer to the bottom boundary edge (second boundary edge 014) than the top lateral crease line 016. The bottom lateral crease line 015 is configured to define the bottom peripheral edge of the container precursor that separates the main part from the bottom part.

[0121] For example, the bottom transverse crease line 015 includes a bottom central portion 015a, which is configured to define the bottom front edge of the container front; two bottom end portions 015b, which are arranged on opposite sides of the bottom central portion 015a, near the first boundary edges (011, 012) and configured to define the bottom rear edge of the container front; and two bottom side portions 015c, which are adjacent to the opposite sides of the bottom central portion 015a, each bottom side portion 015c extending between the bottom central portion 015a and a corresponding bottom end portion 015b, and designed to define two corresponding bottom side edges of the container front.

[0122] For example, the sheet-like composite material 01 includes two additional transverse crease lines, namely an additional top transverse crease line 023 and an additional bottom transverse crease line 024, both extending parallel to the transverse direction (the direction of extension along the x-axis) and located near the top boundary edge (second boundary edge 013) and the bottom boundary edge (second boundary edge 014), respectively. The additional top transverse crease line 023 and the top boundary edge (second boundary edge 013) define corresponding top transverse sealing regions, which constitute corresponding top transverse sealing bands defining the container precursor. The additional bottom transverse crease line 024 and the bottom boundary edge (second boundary edge 014) define corresponding bottom transverse sealing regions, which constitute corresponding bottom transverse sealing bands defining the container precursor.

[0123] For example, sloping crease lines (026a, 026b) together with at least one top side portion 016c define a flap region 027 of the sheet composite material 01, the flap region 027 being designed to form at least a portion of the top adhesive portion.

[0124] For example, a pair of slanted crease lines (026a, 026b) are slanted relative to both the longitudinal direction (the direction of extension of the y-axis) and the transverse direction (the direction of extension of the x-axis) and extend within the top region 019, for example, between the top transverse crease line 016 and another top transverse crease line 023.

[0125] For example, a pair of slanted crease lines (026a, 026b) have a common end and opposing ends, the common end being located on another top transverse crease line 023, while the opposing ends point to a continuous line C-C' parallel to the transverse direction (the extension direction of the x-axis). For example, the wing region 027 is approximately a triangular region.

[0126] For example, in one example, the top central portion 016a, the top portion 016b, and the top side portion 016c of the top horizontal crease line 016 are aligned with each other and with the continuous line C-C'.

[0127] For example, the top crease pattern 021 also includes at least one pair of longitudinal crease lines (028a, 028b), such as two pairs of longitudinal crease lines (028a, 028b) extending within the top region 019, arranged on opposite sides of the wing region 027 relative to the lateral direction (the direction of extension of the x-axis), and together defining a crease line; the top region 019 includes a first region, the wing region 027 being connected to the top region 019, wherein the first region and the wing region 027 are configured to be adhesive to each other and to completely overlap.

[0128] For example, the longitudinal crease line 028b is the innermost crease line, and the longitudinal crease lines 028b are located near the opposite first boundary edges (011, 012); the area between the longitudinal crease lines 028b and the area defined by the longitudinal crease lines 028b and the corresponding first boundary edges (011, 012) constitute the top plate defining the container precursor.

[0129] For example, the bottom region 017 may or may not have a wing region. When the bottom region 017 has a wing region, please refer to the relevant description of the top region 019 having a wing region 027, which will not be repeated here.

[0130] For example, referring to Figures 9A and 9B, an auxiliary separation component 09 is provided in at least one of the first region and the wing region 027, and the wing region 027 and / or the first region where the auxiliary separation component 09 is provided corresponds to the second composite region 05. For example, the first composite region 04 and the second composite region 05 are connected as a whole, and the material of the auxiliary separation component 09 is different from the material of the first heat-sealing layer 06. When the sheet-like composite material 01 is folded along the trace line to form a container precursor, the second composite region 05 corresponds to the region where the top adhesive portion is subsequently formed or the first region of the top.

[0131] For example, in one example, in the first composite region 04, a decorative pattern (not shown in FIG9B) is provided on the side of the first heat-sealing layer 06 away from the second heat-sealing layer 08, which has at least one color and is the same as the auxiliary separation component 09.

[0132] For example, the first heat-sealing layer 06 is the surface that is in direct contact with the external environment, and the second heat-sealing layer 08 is the surface that is in contact with the contents to be contained in the container precursor.

[0133] For example, the material of the first heat-sealing layer 06 can be polyolefin.

[0134] For example, polyolefins refer to a class of thermoplastic resins obtained by polymerizing or copolymerizing α-olefins such as ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, and 4-methyl-1-pentene, as well as some cyclic olefins, individually or in combination.

[0135] For example, the polyolefin includes polyethylene or polypropylene. The polyethylene may be, for example, high-density polyethylene (HDPE), medium-density polyethylene (MDPE), low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), very low-density polyethylene (VLDPE), or polyethylene (PE), etc.

[0136] For example, the material of the second heat-sealing layer 08 can also be polyolefin.

[0137] For example, the sheet composite material 10 is the state before the container precursor of the subsequently formed sealed container is formed. The sheet composite material 10 has crease lines. When the sheet composite material 10 is folded along the crease lines, the top, top bonding part, bottom and other structures of the sealed container can be formed.

[0138] For example, at least one embodiment of this disclosure also provides a container precursor comprising a sheet composite material as described in any of the above embodiments and a longitudinal seam that connects two first boundary edges of the sheet composite material to form a container precursor surrounding the periphery.

[0139] For example, Figure 10 is a three-dimensional structural schematic diagram of a container precursor formed using the sheet composite material shown in Figure 9A according to an embodiment of the present disclosure. As shown in Figure 10, a longitudinal seam (not shown) connects the two first boundary edges (011, 012) of the sheet composite material to form a container precursor 200 surrounding the periphery. The container precursor 200 is cylindrical, and its top and bottom are not yet folded. As shown in Figure 10, the top 201 has an open end 2011, and the top 201 has an opening 2011a at the open end 2011. The top adhesive part 202 is provided at the open end 2011 of the top 201. After the cylindrical container precursor 200 is folded according to the creases shown by the dashed lines, the contents are filled into the container precursor, and the top and bottom are sealed. After the top 201 and the top adhesive part are bonded together, it can be formed into the structure of the sealed container 100 shown in Figure 1.

[0140] For example, in one example, referring to Figures 9A, 9B, and 10, the auxiliary separation component 09 is exposed to the external environment or is covered by a release film separable from the auxiliary separation component 09. For example, when the auxiliary separation component 09 is covered by a release film separable from the auxiliary separation component 09, it can be ensured that the auxiliary separation component 09 has a certain degree of stickiness, and the release film can be torn off when the auxiliary separation component 09 is needed.

[0141] For example, the auxiliary separation component 09 includes ink; at least one of the outer surfaces of the top region 019 and the wing region 027 is provided with a decorative pattern 208, the decorative pattern 208 having at least one color the same as the auxiliary separation component 09. For example, both the decorative pattern 208 and the auxiliary separation component 09 are formed using red ink, or both are formed using green ink. The decorative pattern 208 and the auxiliary separation component 09 are formed using the same material and in the same process step, allowing the formation of the auxiliary separation component 09 without increasing the types of raw materials or the number of process steps, thus saving production costs. Furthermore, since different raw materials require different equipment or components for application, the use of the same material and formation of the decorative pattern 208 and the auxiliary separation component 09 in the same process step also saves equipment costs. For example, different colored inks can be printed onto the outer surface of the top of a sealed container using flexographic printing, and after each printing step, the applied ink is dried to form the decorative pattern 208. For example, printing one color of ink onto the first area of ​​the top 201 and drying the ink can form the auxiliary separation component 09.

[0142] For example, the auxiliary separation component 09 includes a first adhesive, the softening temperature of which is 40°C-70°C. For example, the softening temperature of the first adhesive is 55°C-65°C.

[0143] For example, the first adhesive is a commercially available Dow brand silicone pressure-sensitive adhesive, model DOWSIL™ 7657, and the external pressure applied when the first adhesive bonds the first region and the wing region (corresponding to the top adhesive portion) is 2.5 x 10 4 Pa.

[0144] For example, when the softening temperature of the first adhesive is below 40°C, after the top 201 and the wing region 027 (corresponding to the top adhesive portion) are subsequently bonded, the adhesive force between the top 201 and the top adhesive portion is poor. The top 201 and the top adhesive portion can easily separate even without heating, thus affecting the quality of the subsequently formed sealed container. When the softening temperature of the first adhesive is above 70°C, the top 201 and the top adhesive portion are difficult to separate even under heating conditions, and no pressure relief opening will be formed. This can easily cause the subsequently formed sealed container to crack or its contents to splash during heating.

[0145] For example, the auxiliary separation component 09 includes a first adhesive, and at least one of the first region and the wing region 027 is further provided with a second adhesive. The softening temperature of the first adhesive is lower than that of the second adhesive. For example, when a sealed container is subsequently formed, the first region and the wing region 027 (corresponding to the top adhesive portion) can be bonded together by the first and second adhesives to ensure the stability of the bond between the top 201 and the wing region 027 (corresponding to the top adhesive portion). This allows the sealed container to maintain a stable sealing state during transportation, transfer, or compression, thereby ensuring that the quality of its contents is not damaged.

[0146] For example, the sealed container to be formed has a first adhesive and a second adhesive between the first region and the wing region 027 (corresponding to the top adhesive portion), and the softening temperature of the first adhesive is lower than that of the second adhesive, which makes it easier for the first region and the wing region 027 (corresponding to the top adhesive portion) bonded by the first adhesive to separate from each other. That is, compared to the case where only the second adhesive is used to bond the first region and the wing region 027 (corresponding to the top adhesive portion) without using the first adhesive, when the sealed container is subsequently formed, the first adhesive weakens the adhesive force when the first region and the wing region 027 (corresponding to the top adhesive portion) are subsequently bonded.

[0147] For example, Figure 11 is a three-dimensional structural schematic diagram of a container precursor provided in an embodiment of the present disclosure. As shown in Figure 11, the container precursor is a precursor produced during the manufacturing process of a sealed container. The container precursor 200 includes a top 201 and a top adhesive portion 202. The top 201 includes a top surface and a side surface above approximately half the height of the container precursor 200, and includes a first region 203. The top adhesive portion 202 is connected to the top 201. The first region 203 and the top adhesive portion 202 are configured to be adhesive to each other and to completely overlap. The container precursor 200 also includes an auxiliary separation component 205. In Figure 11, the auxiliary separation component 205 is only provided in the first region 203, and the auxiliary separation component 205 is not provided in the top adhesive portion 202. The container precursor 200 includes a composite layer, which includes an inner heat-sealing layer, a support layer, and an outer heat-sealing layer stacked sequentially away from the accommodating space of the container precursor. The material of the auxiliary separation component 205 is different from the material of the outer heat-sealing layer. In this case, the auxiliary separation component 205 can be set separately and flexibly, which helps to facilitate the realization of the container precursor according to the embodiments of the present disclosure.

[0148] For example, the outer contour shape of the container front 200 shown in Figure 11 is roughly a cuboid. However, the embodiments disclosed herein are not limited to this. The outer contour shape of the container front 200 can also be roughly a cylinder, a cube, a polyhedron with more than 6 faces, etc.

[0149] It should be noted that the top 201 can be all or part of the cross-section above the middle position of the cylindrical portion of the entire container front body. For example, the top 201 can be the upper and top portion of a rectangular side surface of the cuboid in Figure 11; the top 201 can also be all or part of the top surface of the cuboid in Figure 11; the top 201 can also be a portion of the upper end of a rectangular side surface of the cuboid in Figure 11. The embodiments of this disclosure are not limited to these, but do not include the top adhesive portion 202, as long as the top 201 includes the top surface and the side surface above approximately half the height of the container front body 200.

[0150] The embodiments disclosed herein are not limited to providing the auxiliary separation component 205 in the first region 203. The auxiliary separation component 205 may also be provided in the first region 203 and the top adhesive portion 202, or the auxiliary separation component 205 may be provided only in the top adhesive portion 202.

[0151] For example, in another example, when the material of the outer heat-sealing layer is polyolefin, an auxiliary separation component 205 is provided in both the first region 203 and the top adhesive portion 202. When the material of the surface of the top adhesive portion 202 that overlaps with the first region 203 and the material of the top 201 corresponding to the first region 203 are both polyolefin, the material of the auxiliary separation component 205 is different from the material of the surface of the first region 201 that contacts the auxiliary separation component 205, and the material of the auxiliary separation component 205 is also different from the material of the surface of the top adhesive portion 202 that contacts the auxiliary separation component 205.

[0152] For example, in another example, when the material of the outer heat-sealing layer is polyolefin, the material of the surface of the top adhesive portion 202 that overlaps with the first region 203 is polyolefin, the auxiliary separation component 205 is only provided in the top adhesive portion 202, the auxiliary separation component 205 is not provided in the first region 203, and the material of the auxiliary separation component 205 is different from the material of the surface of the top adhesive portion 202 that contacts the auxiliary separation component 205.

[0153] For example, when the container front 200 is sealed, the auxiliary separation component 205 weakens the adhesive force between the first region 203 and the top adhesive portion 202.

[0154] For example, the auxiliary separation component 205 may be exposed to the external environment or covered by a release film that is separable from the auxiliary separation component 205. In Figure 11, the auxiliary separation component 205 is exposed to the external environment. For example, when the auxiliary separation component 205 is covered by a release film that is separable from the auxiliary separation component 205, it can be ensured that the auxiliary separation component 205 has a certain degree of stickiness, and the release film can be torn off when the auxiliary separation component 205 is needed.

[0155] For example, the auxiliary separation component 205 includes ink, and at least one of the outer surfaces of the top 201 and the top adhesive portion 202 is provided with a decorative pattern 208, which has at least one color that is the same as that of the auxiliary separation component 205.

[0156] For example, as shown in Figure 11, the decorative pattern 208 has at least one color that is the same as the auxiliary separation component 205. For example, both the decorative pattern 208 and the auxiliary separation component 205 are formed using red ink, or both are formed using green ink. Since the decorative pattern 208 and the auxiliary separation component 205 are formed using the same material and in the same process step, the formation of the auxiliary separation component 205 can be achieved without increasing the types of raw materials or the number of process steps, thus saving production costs. Furthermore, since different raw materials require different equipment or components for application, using the same material and forming the auxiliary separation component 205 in the same process step also saves equipment costs.

[0157] For example, different colored inks are printed onto the outer surface of the top of a sealed container using flexographic printing. After each printing step is completed, the applied ink is dried to form a decorative pattern 208. For example, one color of ink is printed onto the first region 203 of the top 201, and after the ink is dried, an auxiliary separation component 205 is formed.

[0158] For example, in the case where the auxiliary separating component 205 includes ink, and at least one of the outer surfaces of the top 201 and the top adhesive portion 202 is provided with a decorative pattern 208, and the decorative pattern 208 has at least one color that is the same as the auxiliary separating component 205, at least one of the first region 203 and the top adhesive portion 202 is also provided with an adhesive to facilitate bonding the first region 203 and the top adhesive portion 202 to each other and making them completely overlap during the subsequent formation of a sealed container. The adhesive may overlap with or not overlap with the auxiliary separating component 205; for example, the adhesive may partially overlap with the auxiliary separating component 205. For example, the adhesive may be ordinary glue, which can ensure the reliability of the bond between the first region 203 and the top adhesive portion 202.

[0159] For example, the auxiliary separation component 205 includes ink, and the outer surface of the top adhesive portion 202 is provided with a decorative pattern 208. The decorative pattern 208 on the top adhesive portion 202 has at least one color that is the same as that of the auxiliary separation component 205. This can be referred to in the above description of the decorative pattern 208 on the top 201 having at least one color that is the same as that of the auxiliary separation component 205, which will not be repeated here.

[0160] It should be noted that the outer surface of the top 201 refers to the surface of the top 201 exposed to the environment, and the outer surface of the top adhesive portion 202 refers to the surface of the top adhesive portion 202 exposed to the environment.

[0161] For example, in another example, the auxiliary separation component 205 includes a first adhesive with a softening temperature of 40°C-70°C, for example, the softening temperature of the first adhesive is 55°C-65°C.

[0162] For example, the first adhesive is a commercially available Dow brand silicone pressure-sensitive adhesive, model DOWSIL™ 7657, and the external pressure applied when the first adhesive bonds the first region 103 and the top adhesive portion 202 is 2.5 x 10 4 Pa.

[0163] For example, when the softening temperature of the first adhesive is below 40°C, after the top 201 and the top adhesive portion 202 are subsequently bonded, the adhesive force between the top 201 and the top adhesive portion 202 is poor, and the top 201 and the top adhesive portion 202 can easily separate even without heating, thus affecting the quality of the subsequently formed sealed container. When the softening temperature of the first adhesive is above 70°C, the top 201 and the top adhesive portion 202 are difficult to separate even under heating conditions, and no pressure relief opening will be formed, which can easily cause the subsequently formed sealed container to crack or the contents of the sealed container to splash during the heating process.

[0164] For example, in another example, the auxiliary separation component 205 includes a first adhesive, and at least one of the first region 203 and the top adhesive portion 202 is further provided with a second adhesive, the softening temperature of the first adhesive being lower than that of the second adhesive. For example, during the subsequent formation of a sealed container, the first region 203 and the top adhesive portion 202 can be bonded together by the combined action of the first and second adhesives to ensure the stability of the bond between the top 201 and the top adhesive portion 202, so that the sealed container to be formed can maintain a stable sealing state during transportation, transfer, or compression, thereby ensuring that the quality of its contents is not damaged.

[0165] For example, the sealed container to be formed has a first adhesive and a second adhesive between the first region 203 and the top adhesive portion 202, and the softening temperature of the first adhesive is lower than that of the second adhesive, which makes it easier for the portion of the first region 203 and the top adhesive portion 202 bonded by the first adhesive to separate from each other. That is, compared to the case where only the second adhesive is used to bond the first region 203 and the top adhesive portion 202 without using the first adhesive, when the sealed container is subsequently formed, the first adhesive weakens the adhesive force when the first region 203 and the top adhesive portion 202 are subsequently bonded.

[0166] For example, as shown in Figure 11, there is a trace line 206 at the position where the top adhesive portion 202 connects with the top 201. Along the trace line 206, the top adhesive portion 202 can be folded relative to the top 201 to a position where the first region 203 and the top adhesive portion 202 are bonded to each other. In Figure 11, the top adhesive portion 202 can be folded downward with the trace line 206 as the axis so that the top adhesive portion 202 moves closer to the first region 203, and finally the first region 203 and the top adhesive portion 202 come into contact with each other and bond. In Figure 11, the trace line 206 is a straight line.

[0167] For example, in Figure 11, the auxiliary separation component 205 is disposed in the region of the first region 203 spaced apart from the trace line 206, and the auxiliary separation component 205 is disposed at the location of the endpoint of the first region 203 furthest from the trace line 206 and in its adjacent region. Disposing of the auxiliary separation component 205 in the region of the first region 203 furthest from the trace line 206 can weaken the adhesion of the edge region.

[0168] For example, in another example, the auxiliary separation component 205 may be provided in the area of ​​the top adhesive portion 202 that is spaced apart from the trace line 206, that is, the auxiliary separation component 205 may be provided in the area of ​​the top adhesive portion 202 that is away from the trace line 206.

[0169] For example, in another example, an auxiliary separation component 205 is provided in both the first region 203 and the top adhesive portion 202. The auxiliary separation component 205 is located in the region of the first region 203 that is spaced apart from the trace line 206, and in the region of the top adhesive portion 202 that is spaced apart from the trace line 206. For details, please refer to the above description of setting the auxiliary separation component 205 in the region of the first region 203 or the top adhesive portion 202 that is away from the trace line 206, which will not be repeated here.

[0170] It should be noted that the region of the first region 203 that is far from the trace line 206 refers to the region of the first region 203 that is not adjacent to the trace line 206, or the location of the endpoint of the first region 203 that is farthest from the trace line 206 or the region adjacent to it.

[0171] For example, Figure 11 illustrates an example where the shapes of the first region 203, the top adhesive portion 202, and the planar shape of the auxiliary separation component 205 are all triangular. However, the embodiments disclosed herein are not limited to this. The shapes of the first region 203, the top adhesive portion 202, and the planar shape of the auxiliary separation component 205 can have different shapes, and can each be a triangle, a pentagon, a heptagon, a combination of a square and a triangle, a combination of a rectangle and a triangle, a combination of a circle and a triangle, a combination of an ellipse and a triangle, a zigzag shape, or a combination of a zigzag shape and a triangle.

[0172] For example, as shown in Figure 11, the top adhesive part 202 is configured to be bonded to the side surface of the top 201, which is more conducive to the subsequent filling operation of the filling machine.

[0173] For example, as shown in FIG. 11, the container body 200 includes two top bonding parts 202, which are provided on both sides of the top 201, and the two top bonding parts 202 are respectively connected to the top 201 through trace lines 206, but the auxiliary separation part 205 is provided only on one top bonding part 201 and / or the first area corresponding to the one top bonding part 201.

[0174] For example, the container body 200 further includes a bottom and a bottom bonding part, the bottom bonding part is connected to the bottom, and the auxiliary separation part is not provided on the bottom bonding part and / or the part corresponding to the bottom that can be bonded thereto.

[0175] For example, FIG. 12 is a schematic plan view of a top bonding part 202 and an auxiliary separation part provided by an embodiment of the present disclosure. As shown in FIG. 12, the planar shape of the top bonding part 202 is triangular, the auxiliary separation part 205 is arranged to be spaced apart from the trace line 206, and the bottom side of the top bonding part 202 coincides with the trace line 206. The auxiliary separation part 205 is arranged in the area of the top bonding part 202 far from the trace line 206, and the auxiliary separation part 205 is arranged at the position where the endpoint of the top bonding part 202 farthest from the trace line 206 is located and the adjacent area. Arranging the auxiliary separation part 205 in the area of the top bonding part 202 far from the trace line 206 can weaken the bonding ability of the edge area after the first area 203 and the top bonding part 202 are bonded.

[0176] For example, the planar shape of the auxiliary separation part 205 includes a first polygon. For example, the first polygon can be a triangle, a rhombus, a pentagon, a heptagon, a combination of a square and a triangle, a combination of a rectangle and a triangle, a combination of a circle and a triangle, a combination of an ellipse and a triangle, or a zigzag shape, etc. For example, in FIG. 12, taking the first polygon as the rhombus ABCD as an example for illustration, the rhombus ABCD includes a first vertex angle <ABC, and the vertex B (the first vertex) of the first vertex angle <ABC is the point of the auxiliary separation part 205 farthest from the trace line 206.

[0177] For example, the planar shape of the top bonding part 202 is a second polygon, and the second polygon can be a triangle, a rhombus, a pentagon, a heptagon, a combination of a square and a triangle, a combination of a rectangle and a triangle, a combination of a circle and a triangle, a combination of an ellipse and a triangle, or a zigzag shape, etc.

[0178] In FIG. 12, taking the second polygon as the triangle A'B'C' as an example for illustration, the triangle A'B'C' includes the second apex angle <A'B'C'. The vertex B' (the second vertex) of the second apex angle <A'B'C' is the point on the top bonding part 202 that is farthest from the trace line 206, and the first apex angle <ABC coincides with the second apex angle <A'B'C'. For example, relative to the case where the lines coincide at the edge, the end point B of the auxiliary separation part 205 that is farthest from the trace line 206 is set to coincide with the end point B' of the top bonding part 202 that is farthest from the trace line 206. After the sealed container formed by the container precursor is used subsequently, the bonding ability of the edge part at the end point position can be weakened, so that the top 201 and the top bonding part 202 are more likely to separate first at the end point B' position of the edge part of the top bonding part 202 during the heating process. After the sealed container is formed, the top 201 and the top bonding part 202 are likely to separate at the end point B' position of the top bonding part 202, that is, the end point B' of the top bonding part 202 can separate from the top 201 first, so that the end point B' of the top bonding part 202 is likely to warp. Due to the action of the tensile stress, the top bonding part 202 is more likely to gradually separate from the top 201 from the end point B' position towards the position close to the trace line 206.

[0179] For example, as shown in FIG. 12, the shortest distance from the first polygon (rhombus ABCD) to the trace line 206 is the first distance d1, and the shortest distances from the first vertex B and the second vertex B' to the trace line 206 are the second distance d2. In FIG. 12, the first distance d1 is greater than half of the second distance d2. The embodiments of the present disclosure are not limited to this, and the first distance d1 can also be equal to half of the second distance d2. For example, the distance size relationship that the first distance d1 is greater than or equal to half of the second distance d2 can ensure that the auxiliary separation part 205 is arranged in the half part area or the small half part area of the top bonding part 202 that is far from the trace line 206 (that is, all or part of the upper half part area of the top bonding part 204 shown in FIG. 12). Thus, after the sealed container is formed subsequently, the top 201 and the top bonding part 202 can be more likely to separate in the area far from the trace line 206.

[0180] For example, FIG. 13 is a schematic plan view of the top bonding portion and the auxiliary separation member provided by another embodiment of the present disclosure. As shown in FIG. 13, the first polygon is triangle ABC, which has a first vertex angle <ABC. The side AC of the first polygon ABC opposite to the first vertex angle <ABC is the first base, and the first base AC is parallel to the trace line 206. The second polygon is triangle A'B'C', which has a second vertex angle <A'B'C'. The side opposite to the second vertex angle <A'B'C' of the second polygon A'B'C' is the second base A'C', and the second base A'C' is parallel to the trace line 206. In another example, the second base A'C' may coincide with the trace line 206.

[0181] For example, as shown in FIG. 13, the shortest distance from the first polygon (triangle ABC) to the trace line 206 is the first distance d1, and the shortest distances from the first vertex B and the second vertex B' to the trace line 206 are the second distance d2. In FIG. 13, the first distance d1 is equal to half of the second distance d2. The embodiments of the present disclosure are not limited to this. The first distance d1 may also be greater than half of the second distance d2. For example, the distance magnitude relationship where the first distance d1 is greater than or equal to half of the second distance d2 can ensure that the auxiliary separation member 205 is disposed in the half-region or the small half-region of the top bonding portion 202 away from the trace line 206 (i.e., all or part of the upper half-region of the top bonding portion 204 shown in FIG. 13). Thus, after the container precursor 200 is subsequently used to form a sealed container, the top 201 and the top bonding portion 202 are more likely to separate in the region away from the trace line 206. And in the case where both the first polygon ABC and the second polygon A'B'C' are isosceles triangles, it can be made that the area of the auxiliary separation member 205 is less than or equal to half of the area of the top bonding portion 202, and it can also ensure a sufficient bonding area between the first region 203 and the top bonding portion 202 to ensure the sealing performance of the subsequently formed sealed container.

[0182] For example, for the example of disposing the auxiliary separation member on the first region, reference can be made to the relevant description above, and details are not repeated here.

[0183] For example, the auxiliary separation member 206 includes a plurality of separated dot patterns and / or the auxiliary separation member 206 includes a grid pattern. For the relevant description of the auxiliary separation member 206, reference can be made to the relevant description of FIG. 6 in the relevant embodiments of the sealed container, and details are not repeated here.

[0184] For example, as shown in Figure 11, when the top adhesive portion 202 is folded to a position where the first region 203 and the top adhesive portion 202 come into contact with each other, the first region 203 and the top adhesive portion 202 completely overlap.

[0185] For example, as shown in Figure 11, the area of ​​the auxiliary separation component 205 disposed in the first region 203 is 5%-80% of the area of ​​the first region 203. For example, the area of ​​the auxiliary separation component 205 is 5%, 10%, 20%, 30%, 40%, 50%, 60%, 70% or 80% of the area of ​​the first region 203.

[0186] For example, in another example, an auxiliary separation component 205 may be provided on the top adhesive portion 202, and the area of ​​the auxiliary separation component 205 is 5%-80% of the area of ​​the top adhesive portion 202. For example, the area of ​​the auxiliary separation component 205 is 5%, 10%, 20%, 30%, 40%, 50%, 60%, 70% or 80% of the area of ​​the top adhesive portion 202.

[0187] For example, in another example, the auxiliary separation component 205 may be disposed in the first region 203 and the top adhesive portion 202, with the area of ​​the auxiliary separation component 205 disposed in the first region 203 being 5%-80% of the area of ​​the first region 203. For example, the area of ​​the auxiliary separation component 205 may be 10%, 15%, 25%, 35%, 45%, 55%, 65%, 75%, or 80% of the area of ​​the first region 203. Similarly, the area of ​​the auxiliary separation component 205 disposed in the top adhesive portion 202 may be 5%-80% of the area of ​​the top adhesive portion 202. For example, the area of ​​the auxiliary separation component 205 may be 10%, 15%, 25%, 35%, 45%, 55%, 65%, 75%, or 80% of the area of ​​the top adhesive portion 2020.

[0188] For example, in Figure 11, when the first region 203 and the top adhesive portion 202 are attached but not bonded, the outer contour of the container front is a cuboid. The outer contour shape of the container front can also be a cylinder, a cube, a polyhedron with more than 6 faces, etc., and the embodiments disclosed herein do not limit this. In Figure 11, the top adhesive portion 202 is located on the side surface of the cuboid cylindrical portion. The top adhesive portion 202 can also be located on the upper or lower surface of the cuboid.

[0189] For example, Figure 14 is a three-dimensional structural diagram of a container precursor provided in another embodiment of the present disclosure. As shown in Figure 14, the top 201 includes a first region 203, the auxiliary separation component 205 is located in the top adhesive portion 202, and the auxiliary separation component is not provided in the first region 203.

[0190] For example, as shown in Figure 14, the auxiliary separation component 205 is disposed in the region of the top adhesive portion 202 away from the trace line 206, and the auxiliary separation component 205 is disposed at the endpoint of the top adhesive portion 202 furthest from the trace line 206 and in its adjacent region. Disposing of the auxiliary separation component 205 in the region of the top adhesive portion 202 furthest from the trace line 206 can weaken the adhesion of the edge region after the sealing container is subsequently formed.

[0191] For example, as shown in Figure 14, the top adhesive portion 202 can be folded upward along the trace line 206 so that the top adhesive portion 202 moves closer to the first region 203, eventually making the first region 203 and the top adhesive portion 202 come into contact with each other and bond together, and in Figure 14, the trace line 206 is a straight line.

[0192] At least one embodiment of this disclosure also provides a method for preparing a sealed container, the method comprising: providing a top, the top including a top surface and a side surface of approximately half the height of the sealed container to be formed, and including a first region; providing a top adhesive portion connected to the top; and bonding the first region and the top adhesive portion to each other and completely overlapping them; wherein the method further comprises: providing an auxiliary separation component sandwiched between the first region and the top adhesive portion, wherein the sealed container to be formed includes a composite layer, the composite layer including an inner heat-sealing layer, a support layer, and an outer heat-sealing layer away from the contents of the sealed container to be formed, the material of the auxiliary separation component being different from the material of the outer heat-sealing layer; the method further comprises: providing a bottom, wherein the sealed container remains stable when the bottom is placed on a horizontal or substantially horizontal surface. The sealed container prepared by this method can separate the top and the top adhesive part when the temperature of the sealed container reaches a first preset temperature by weakening the adhesive force between the top and the top adhesive part. Then the sealed container forms a pressure relief opening to allow the gas in the sealed container to be discharged, thereby reducing the pressure difference between the inside and outside of the sealed container and preventing the sealed container from bursting or the contents from splashing.

[0193] It should be noted that the current bonding method between the top adhesive part and the top of the sealed container is as follows: hot air is used to heat and activate the outer heat-sealing layer (e.g., made of polyethylene) at the pre-bonding position, and then pressure is applied at the pre-bonding position to bond the top adhesive part to the top. The bonding force between the top adhesive part and the top of the sealed container can be weakened by controlling parameters such as the amount of hot air injected, the temperature of the injected hot air, and the pressure.

[0194] For example, Figure 15 is a flowchart of a method for preparing a sealed container according to an embodiment of the present disclosure. As shown in Figure 15, the preparation method includes the following steps:

[0195] S11: Provide a top, which includes a top surface and a side surface above approximately half the height of the sealed container to be formed, and includes a first region.

[0196] For example, the top may be all or part of the cross-section located at the middle position of the entire cylindrical portion. For example, the top may be the portion of a rectangular side surface of a cuboid located at the top and end; the top may also be all or part of the top surface of the cuboid, and the embodiments of this disclosure are not limited thereto, which may also include a top sealing portion and a portion area near the top sealing portion, but do not include a top adhesive portion.

[0197] For example, a sealed container with a cuboid outer contour is used as an example for illustration. The cuboid sealed container is a brick-shaped box container. The embodiments disclosed herein are not limited to this. The outer contour shape of the sealed container can also be a cylinder, a cube, a polyhedron with more than 6 faces, etc.

[0198] For example, the planar shape of the first region can be a pentagon, heptagon, square, rectangle, a combination of square and triangle, a combination of rectangle and triangle, a combination of circle and triangle, a combination of ellipse and triangle, etc.

[0199] S12: Provide a top adhesive portion that is connected to the top.

[0200] For example, the top adhesive portion may be located on the side surface of the top. In other embodiments, the top adhesive portion may also be located on the top surface of the sealed container and connected to the top. The embodiments disclosed herein are not limited in this respect.

[0201] For example, the top adhesive part and the top share a common bottom edge at the connection point, and the planar shape of the top adhesive part can also be one of the following: pentagon, heptagon, square, rectangle, combination of square and triangle, combination of rectangle and triangle, combination of circle and triangle, combination of ellipse and triangle, zigzag, etc.

[0202] S13: Provide an auxiliary separation component sandwiched between the first region and the top adhesive portion, wherein the sealed container to be formed includes a composite layer comprising an inner heat-sealing layer, a support layer, and an outer heat-sealing layer disposed away from the contents of the sealed container to be formed, the auxiliary separation component being made of a different material than the outer heat-sealing layer.

[0203] For example, the auxiliary separation component is sandwiched between the first region and the top adhesive portion so that when the first region and the top adhesive portion are subsequently overlapped, the auxiliary separation component is located in the area where the first region and the top adhesive portion overlap.

[0204] For example, the auxiliary separation component includes ink, and at least one of the outer surface of the top and the outer surface of the top adhesive portion is provided with a decorative pattern. The auxiliary separation component is formed during the formation of the decorative pattern and is formed using an ink that forms a decorative layer, which can save on raw material costs, process costs and equipment costs.

[0205] For example, the auxiliary separation component includes a first adhesive, through which the first region and the top adhesive portion are bonded to each other, and the softening temperature of the first adhesive is 40°C-70°C.

[0206] For example, the material of the outer heat-sealing layer included in the composite layer can be polyolefin, such as polyethylene, while the material of the auxiliary separation component is different from that of polyolefin.

[0207] S14: Bond the first region and the top adhesive portion together and make them completely overlap.

[0208] For example, when the auxiliary separation component is exposed to the external environment, the first region and the top adhesive portion can be directly bonded together, and pressure can be applied to the top or the top adhesive portion to bond the first region and the top adhesive portion together.

[0209] For example, when the auxiliary separation component is covered by a release film that is separable from the auxiliary separation component, the first region and the top adhesive portion can be directly bonded together by tearing off the release film and applying pressure to the top or the top adhesive portion to bond the first region and the top adhesive portion together.

[0210] S15: Provides a bottom that keeps the sealed container stable when the bottom is placed on a horizontal or substantially horizontal surface.

[0211] For example, the bottom of the sealed container can be a structure where the middle area of ​​the bottom is recessed towards the top, and the outer edge is on the same plane; it can also be a structure where the middle area or the area near the middle of the bottom protrudes away from the top; or it can be a structure where two planes are pressed together, and since the thickness of the pressed planes is very thin, the bottom can be considered to be on the same plane; or it can be a structure where the middle area of ​​the bottom is on the same plane relative to the top, and at least a portion of the edge is recessed towards the top or protrudes away from the top. The embodiments of this disclosure do not limit the specific structure of the bottom, as long as it satisfies the requirement that the sealed container remains stable and does not tip over when the bottom is placed on a horizontal or substantially horizontal surface.

[0212] For example, a roughly horizontal plane refers to a plane with an angle of less than 30 degrees to a horizontal plane, and a sealed container maintaining a stable state means that when the sealed container is placed on a stationary or rotating load-bearing surface, even if the top of the sealed container is open, the product inside the sealed container will not flow out.

[0213] For example, Figure 16 is a flowchart of a method for preparing a sealed container according to another embodiment of the present disclosure. As shown in Figure 16, the preparation method includes the following steps:

[0214] S21: Provide a top, the top including a top surface and a side surface above approximately half the height of the sealed container to be formed, and including a first region.

[0215] The description of the top and the first region can be found in the above description of Figure 15, and will not be repeated here.

[0216] S22: Provide a top adhesive portion that is connected to the top.

[0217] The description of the top adhesive portion can be found in the above description of Figure 15, and will not be repeated here.

[0218] S23: A decorative pattern is formed on at least one of the outer surfaces of the first region and the top adhesive portion, and an auxiliary separation component is formed using ink for forming the decorative pattern. The auxiliary separation component is sandwiched between the first region and the top adhesive portion, and the sealed container to be formed includes a composite layer, which includes an inner heat-sealing layer, a support layer, and an outer heat-sealing layer away from the contents of the sealed container to be formed, stacked sequentially. The material of the auxiliary separation component is different from the material of the outer heat-sealing layer.

[0219] For example, both the decorative pattern and the auxiliary separation component can be printed using red ink, or both can be printed using green ink. Using the same material and forming the auxiliary separation component in the same process step allows for the formation of the auxiliary separation component without increasing the variety of raw materials or the number of process steps, thus saving production costs. Furthermore, since different raw materials require different equipment or components for application, using the same material and forming the auxiliary separation component in the same process step also saves on equipment costs.

[0220] For example, different colored inks can be printed onto the outer surface of the top using flexographic printing. After each printing step is completed, the applied ink is dried to form a decorative pattern. For instance, printing one color of ink onto the first area of ​​the top and drying that ink forms an auxiliary separation component.

[0221] For example, if the auxiliary separation component includes ink, a decorative pattern may also be provided on the outer surface of the top adhesive portion, and the decorative pattern on the top adhesive portion has at least one color that is the same as that of the auxiliary separation component. For the above description of the scheme where the decorative pattern on the top has at least one color that is the same as that of the auxiliary separation component, please refer to the relevant description of the scheme where the decorative pattern on the top has at least one color that is the same as that of the auxiliary separation component, which will not be repeated here.

[0222] For example, in the case where the auxiliary separating component includes ink, and at least one of the outer surfaces of the top and the top adhesive portion is provided with a decorative pattern, and the decorative pattern has at least one color that is the same as the auxiliary separating component, an adhesive is also sandwiched between the first region and the top adhesive portion to bond the first region and the top adhesive portion to each other. This adhesive may or may not overlap with the auxiliary separating component; for example, the adhesive may partially overlap with the auxiliary separating component. For example, the adhesive may be ordinary glue.

[0223] S24: Bond the first region and the top adhesive portion to each other and make the first region and the top adhesive portion completely overlap.

[0224] For example, the auxiliary separation component is exposed to the external environment, which can directly bond the first region and the top adhesive portion together, and apply pressure to the top or the top adhesive portion to bond the first region and the top adhesive portion together.

[0225] S25: Provides a bottom so that the sealed container remains stable when the bottom is placed on a horizontal or substantially horizontal surface.

[0226] For example, the description of the bottom can be found in the above description of Figure 15, and will not be repeated here.

[0227] For example, Figure 17 is a flowchart of a method for preparing a sealed container according to another embodiment of this disclosure. As shown in Figure 17, the preparation method includes the following steps:

[0228] S31: Provide a top, which includes a top surface and a side surface above approximately half the height of the sealed container to be formed, and includes a first region.

[0229] The description of the top and the first region can be found in the above description of Figure 15, and will not be repeated here.

[0230] S32: Provide a top adhesive portion that is connected to the top.

[0231] The description of the top adhesive portion can be found in the above description of Figure 15, and will not be repeated here.

[0232] S33: An auxiliary separation component is provided, and the auxiliary separation component is formed using a first adhesive, wherein the softening temperature of the first adhesive is 40°C-70°C. The auxiliary separation component is sandwiched between a first region and a top adhesive portion, and the sealed container to be formed includes a composite layer, which includes an inner heat-sealing layer, a support layer, and an outer heat-sealing layer away from the contents of the sealed container to be formed, stacked sequentially. The material of the auxiliary separation component is different from the material of the outer heat-sealing layer.

[0233] Furthermore, the softening temperature of the first adhesive after curing is 55℃-65℃.

[0234] For example, the first adhesive is a commercially available Dow brand silicone pressure-sensitive adhesive, model DOWSIL™ 7657, and the external pressure applied when the first adhesive bonds the first region and the top adhesive portion is 2.5 x 10 4 Pa.

[0235] For example, when the softening temperature of the first adhesive after curing is below 40°C, the adhesion between the top and the top adhesive portion is poor, and the top and top adhesive portion can easily separate even without heating, thus affecting the quality of the sealed container. When the softening temperature of the first adhesive after curing is above 70°C, the top and top adhesive portion are difficult to separate even under heating conditions, and no pressure relief opening will be formed, which can easily cause the sealed container to crack or its contents to splash during heating.

[0236] S34: Bond the first region and the top adhesive portion to each other and make the first region and the top adhesive portion completely overlap.

[0237] For example, when the auxiliary separation component (first adhesive) is covered by a release film that is separable from the auxiliary separation component, the first region and the top adhesive portion can be directly bonded together by tearing off the release film and applying pressure to the top or the top adhesive portion to bond the first region and the top adhesive portion together.

[0238] S35: Provides a bottom that keeps the sealed container stable when the bottom is placed on a horizontal or substantially horizontal surface.

[0239] For example, the description of the bottom can be found in the above description of Figure 15, and will not be repeated here.

[0240] For example, Figure 18 is a flowchart of a method for preparing a sealed container according to another embodiment of this disclosure. As shown in Figure 18, the preparation method includes the following steps:

[0241] S41: Provides a top, the top including a top surface and a side surface above approximately half the height of the sealed container to be formed, and including a first region.

[0242] The description of the top and the first region can be found in the above description of Figure 15, and will not be repeated here.

[0243] S42: Provide a top adhesive portion that is connected to the top.

[0244] The description of the top adhesive portion can be found in the above description of Figure 15, and will not be repeated here.

[0245] S43: An auxiliary separation component is provided and formed using a first adhesive. The auxiliary separation component is sandwiched between a first region and a top adhesive portion. The sealed container to be formed includes a composite layer, which includes an inner heat-sealing layer, a support layer, and an outer heat-sealing layer that is stacked sequentially away from the contents of the sealed container to be formed. The material of the auxiliary separation component is different from the material of the outer heat-sealing layer.

[0246] For example, the description of the first adhesive can be found in the above description of Figure 17.

[0247] S44: Provides a second adhesive.

[0248] For example, the second adhesive can be ordinary glue.

[0249] S45: The first region and the top adhesive portion are bonded to each other through the first adhesive and the second adhesive, and the first region and the top adhesive portion completely overlap, wherein the softening temperature of the first adhesive is lower than the softening temperature of the second adhesive.

[0250] For example, the combined bonding effect of the first region and the top adhesive portion ensures the stability of the bond between the top and the top adhesive portion, allowing the sealed container to maintain a stable seal during transportation, transfer, or compression, thereby ensuring that the quality of its contents is not damaged. The placement of the first and second adhesives between the first region and the top adhesive portion, with the softening temperature of the first adhesive after curing being lower than that of the second adhesive, makes it easier for the first region and the top adhesive portion bonded by the first adhesive to separate from each other. In other words, compared to using only the second adhesive to bond the first region and the top adhesive portion without using the first adhesive, the first adhesive weakens the adhesive force between the first region and the top adhesive portion.

[0251] For example, the auxiliary separation component is covered by a release film that is separable from the auxiliary separation component. The first region and the top adhesive portion can be directly bonded together by tearing off the release film, and pressure can be applied to the top or the top adhesive portion to bond the first region and the top adhesive portion together.

[0252] S46: Provides a bottom that keeps the sealed container stable when the bottom is placed on a horizontal or substantially horizontal surface.

[0253] For example, the description of the bottom can be found in the above description of Figure 15, and will not be repeated here.

[0254] For example, in another embodiment, the method for preparing the sealed container further includes: sterilizing the container precursor with hydrogen peroxide, and then filling the container precursor with contents; further folding to form the top region of the container precursor, and then bonding the first region and the top adhesive portion together to form a closed and filled sealed container.

[0255] The sealing container, sheet composite material, container precursor, and method for preparing the sealing container provided in the embodiments of this disclosure have at least one of the following beneficial effects:

[0256] (1) The sealing container provided in at least one embodiment of the present disclosure has an auxiliary separation component that can weaken the adhesive force between the first region of the sealing container and the top adhesive portion, so that when the sealing container is heated, the top and the top adhesive portion separate when the temperature of the sealing container reaches a preset temperature, thereby preventing the sealing container from bursting or the contents of the sealing container from splashing.

[0257] (2) The sealing container provided in at least one embodiment of this disclosure uses the same material and is formed in the same process step. The formation of the auxiliary separation component can be achieved without increasing the types of raw materials or the process steps, thereby saving production costs and equipment costs.

[0258] The following points need to be explained:

[0259] (1) The accompanying drawings of the embodiments disclosed herein only involve structures related to the embodiments disclosed herein; other structures may refer to general designs.

[0260] (2) For clarity, the thickness of layers or regions is enlarged or reduced in the drawings used to describe embodiments of the present disclosure, i.e., these drawings are not drawn to actual scale. It is understood that when an element such as a layer, film, region, or substrate is referred to as being “above” or “below” another element, the element may be “directly” located “above” or “below” the other element, or there may be intermediate elements.

[0261] (3) Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0262] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. The scope of protection of this disclosure should be determined by the scope of protection of the aforementioned claim.

[0263] 01: Sheet-like composite materials 02: First Surface 03: Second Surface 04: First composite region 05: Second composite region 06: First heat seal layer 07: Support layer 08: Second heat seal layer 09,105,205: Auxiliary separation components 011,012: First boundary edge 013, 014: Second boundary edge 015,024: Bottom horizontal crease line 015a: Bottom center section 015b: Bottom section 015c: Bottom side portion 016,023: Top horizontal crease line 016a: Top central section 016b: Top section 016c: Top side portion 017: Bottom Area 018: Bottom crease pattern 019: Top Area 021: Top crease pattern 022: Middle Area 026a, 026b: Slanted crease lines 027: Wing area 028a, 028b: Vertical crease lines 100: Sealed container 101,201: Top 102: Top adhesive area (triangular region) 103: Area 1 104,202: Top Adhesive Section 106,206: Trace lines 107: Bottom 108,208: Decorative patterns 110: Kong 111: Contents 200: Container precursor 2011: Open end 2011a: Opening ABC: First polygon ABCD: Rhombus A-A': Cutoff line A'B'C': Second polygon C-C': Continuous line DEFG: Cross section d1: First distance d2: Second distance MNH: Solid line triangle O-O': line S11, S12, S13, S14, S15, S21, S22, S23, S24, S25, S31, S32, S33, S34, S35, S41, S42, S43, S44, S45: Steps

Claims

1. A sealed container, comprising: The top includes a top surface and a side surface approximately half the height of the sealed container, and includes a first region; and a top adhesive portion connected to the top, wherein the first region and the top adhesive portion are bonded to each other and completely overlap; the sealed container also includes an auxiliary separation component sandwiched between the first region and the top adhesive portion; the sealed container includes a composite layer comprising an inner heat-sealing layer, a support layer, and an outer heat-sealing layer disposed sequentially away from the contents of the sealed container; the material of the auxiliary separation component is different from the material of the outer heat-sealing layer; the sealed container also includes a bottom, which maintains a stable state when the bottom is placed on a horizontal or substantially horizontal surface; when the temperature of the sealed container reaches a first preset temperature, the top adhesive portion is configured to separate from the top; when the temperature of the sealed container reaches a second preset temperature, the sealed container is configured to form a pressure relief opening, the pressure relief opening being configured to connect the interior of the sealed container to the external environment; the first preset temperature is less than or equal to the second preset temperature.

2. The sealed container according to claim 1, wherein, The top adhesive portion has a trace line at the location where it connects with the top, and the top adhesive portion is folded relative to the top along the trace line to a position where the first region and the top adhesive portion are bonded to each other; the auxiliary separation component is configured to be spaced apart from the trace line.

3. The sealed container according to claim 2, wherein, The planar shape of the auxiliary separation component includes a first polygon, the first polygon including a first vertex, the vertex of the first vertex being the point of the auxiliary separation component furthest from the trace line; the planar shape of the top adhesive portion is a second polygon, the second polygon including a second vertex, the vertex of the second vertex being the point of the top adhesive portion furthest from the trace line; the shortest distance from the first polygon to the trace line is a first distance; the shortest distance from the vertex of the second vertex to the trace line is a second distance; the first distance is greater than or equal to half of the second distance.

4. The sealed container according to claim 1, wherein, The auxiliary separation component includes multiple dot patterns separated from each other and / or the auxiliary separation component includes a grid pattern.

5. The sealed container according to claim 1, wherein, The area of ​​the auxiliary separation component is 5%-80% of the area of ​​the first region.

6. The sealed container according to claim 1, wherein, The sealed container is cylindrical, and the top adhesive portion is disposed on the side surface of the top.

7. The sealed container according to claim 6, wherein, The sealed container includes two opposing top adhesive portions, and the auxiliary separation component is provided between only one of the top adhesive portions and the first region.

8. The sealed container according to claim 1 further includes a top seal and a bottom seal, wherein, The sealing strength of the top seal is less than that of the bottom seal.

9. A sealed container according to any one of claims 1-8, wherein, The auxiliary separation component includes ink; the outer surface of the sealed container is provided with a decorative pattern, the decorative pattern having at least one color that is the same as the auxiliary separation component.

10. A sealed container according to any one of claims 1-8, wherein, The auxiliary separation component includes a first adhesive, through which the first region and the top adhesive portion are bonded to each other, and the softening temperature of the first adhesive is 40°C-70°C.

11. A sealed container according to any one of claims 1-8, wherein, The auxiliary separation component includes a first adhesive, and a second adhesive is sandwiched between the first region and the top adhesive portion. The first region and the top adhesive portion are bonded to each other through the first adhesive and the second adhesive. The softening temperature of the first adhesive is lower than that of the second adhesive.

12. A sheet-like composite material for preparing a sealing container according to any one of claims 1-11, comprising: The sheet composite material comprises a first surface and a second surface, and includes a first composite region and a second composite region. The first composite region includes a first heat-sealing layer, a support layer, and a second heat-sealing layer stacked sequentially from the first surface to the second surface. The second composite region includes an auxiliary separation component, the first heat-sealing layer, the support layer, and the second heat-sealing layer stacked sequentially from the first surface to the second surface. The material of the auxiliary separation component is different from the material of the first heat-sealing layer. The sheet composite material also includes two first boundary edges parallel to the longitudinal direction and two second boundary edges parallel to the transverse direction, the longitudinal direction and the transverse direction being orthogonal. The sheet composite material also includes a bottom transverse crease line and a top transverse crease line, which divide the sheet composite material into: a bottom region including a bottom crease pattern; a top region including a top crease pattern; and a middle region between the bottom transverse crease line and the top transverse crease line, and located between the bottom region and the top region relative to the longitudinal direction. The top transverse crease line includes: a top central portion. At least one top portion is disposed on one side of the top central portion and adjacent to one of the first boundary edges; and at least one top side portion is adjacent to one side of the top central portion and extends between the top central portion and the at least one top portion; the top crease pattern includes at least a pair of oblique crease lines that are skewed relative to both the longitudinal direction and the transverse direction and extend within the top region; wherein the oblique crease line has a first end pointing to one of the second boundary edges and a second end pointing to a continuous line parallel to the transverse direction and including the top central portion and the at least one top portion of the top transverse crease line; the oblique crease line, together with the at least one top side portion, defines a flap region of the sheet composite material, the flap region being designed to form at least a portion of the top bond; wherein the top crease pattern also includes at least a pair of longitudinal crease lines extending within the top region, disposed on opposite sides of the flap region relative to the transverse direction, and together defining a fold line; the top region includes a first region to which the flap region is connected, wherein... The first region and the wing region are configured to be adhesive to each other and to completely overlap, and an auxiliary separation component is provided in at least one of the first region and the wing region, and the wing region and / or the first region provided with the auxiliary separation component corresponds to the second composite region.

13. The sheet-like composite material according to claim 12, wherein, In the first composite region, a decorative pattern is provided on the side of the first heat-sealing layer away from the second heat-sealing layer, and the decorative pattern has at least one color that is the same as the auxiliary separation component.

14. A container precursor, comprising: According to claim 12 or 13, the sheet composite material and longitudinal joint, wherein the longitudinal joint connects the two first boundary edges of the sheet composite material to form a container precursor surrounding the periphery.

15. The container precursor according to claim 14, wherein, The auxiliary separation component is exposed to the external environment or is covered by a release film that is separable from the auxiliary separation component.

16. The container precursor according to claim 14, wherein, The auxiliary separation component includes ink; at least one of the outer surfaces of the top region and the wing region is provided with a decorative pattern, the decorative pattern having at least one color the same as the auxiliary separation component.

17. The container precursor according to claim 14, wherein, The auxiliary separation component includes a first adhesive, the first adhesive having a softening temperature of 40℃-70℃.

18. The container precursor according to claim 14, wherein, The auxiliary separation component includes a first adhesive, and at least one of the first region and the wing region is further provided with a second adhesive, wherein the softening temperature of the first adhesive is lower than the softening temperature of the second adhesive.

19. A method for preparing a sealed container, comprising: A top is provided, the top including a top surface and a side surface above approximately half the height of the sealing container to be formed, and including a first region; a top adhesive portion is provided, the top adhesive portion being connected to the top; The first region and the top adhesive portion are bonded together and completely overlapped; wherein, the preparation method further includes: providing an auxiliary separation component sandwiched between the first region and the top adhesive portion, wherein the sealed container to be formed includes a composite layer, the composite layer including an inner heat-sealing layer, a support layer and an outer heat-sealing layer away from the contents of the sealed container to be formed, the material of the auxiliary separation component is different from the material of the outer heat-sealing layer; the preparation method further includes: providing a bottom, wherein the sealed container remains stable when the bottom is placed on a horizontal or approximately horizontal surface; when the temperature of the sealed container reaches a first preset temperature, the top adhesive portion is configured to separate from the top; when the temperature of the sealed container reaches a second preset temperature, the sealed container is configured to form a pressure relief opening, the pressure relief opening being configured to connect the interior of the sealed container to the external environment; the first preset temperature is less than or equal to the second preset temperature.

20. The preparation method according to claim 19 further includes: A decorative pattern is formed on the outer surface of the sealed container to be formed, and the auxiliary separation component is formed using ink of at least one color for forming the decorative pattern.

21. The preparation method according to claim 19, wherein, The auxiliary separation component includes: forming the auxiliary separation component using a first adhesive, wherein the softening temperature of the first adhesive is 40°C-70°C; and the first region and the top adhesive portion are bonded to each other through the first adhesive.

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