Sealing caps and packaging containers

Abstract

This disclosure provides a sealing cap for a packaging container and a packaging container. The sealing cap includes: a heat-shrinkable film sleeve with a top opening and a tear line, the tear line extending from the top opening towards the bottom of the heat-shrinkable film sleeve and spaced from the bottom edge of the heat-shrinkable film sleeve; and a top film including a top film body, the top film body being fixedly connected to the top of the heat-shrinkable film sleeve and covering the top opening and a first end of the tear line near the top opening. The packaging container includes the sealing cap. This sealing cap, on the one hand, facilitates easy tearing of the heat-shrinkable film sleeve using the tear line without the need for auxiliary tools; on the other hand, it facilitates simultaneous protection of the opening of the heat-shrinkable film sleeve and the first end of the tear line near the top opening using the top film body, which is beneficial for dust prevention and also helps to prevent the tear line from being torn prematurely during the handling of the packaging container or when the packaging container is impacted.

Description

Technical Field

[0001] This disclosure relates to the field of packaging technology, and in particular to a sealing cap for a packaging container and a packaging container. Background Technology

[0002] To prevent accidental opening, contamination, or impact damage to container lids, a sealing cap is often used to wrap the lid after sealing the packaging container. Heat shrink film, due to its excellent shrinkage properties, is used in the production of these sealing caps. Sealing caps generally consist of a heat shrink film sleeve. During production, the container lid is inserted into the sealing cap from the bottom of the heat shrink film sleeve, and then the heat shrink process causes the sleeve to shrink and tightly wrap around the lid. There are two types of heat shrink film sleeves: top-opening sleeves and top-sealing sleeves. Top-opening sleeves prevent opening but do not prevent contamination. Because of the top opening, it is easier to find the starting tear point, and tools are required to open them. The top sealing film sleeve has two or more longitudinal tear lines designed on the cylindrical heat shrink film on its side. When in use, it is torn open from bottom to top along the axis. The tear lines are achieved by punching holes. If the distance between two adjacent holes is too large, it is not easy to tear. If the distance between the holes is too small, the bottle mouth of bottled water needs to be grasped multiple times during production and handling. During the grasping process, the tear lines are easy to break and cannot play a protective role. Utility Model Content

[0003] The purpose of this disclosure is to provide a sealing cap for a packaging container and a packaging container, which aims to solve the problem that the heat shrink film sleeve of the sealing cap needs to be torn open and removed with the aid of tools.

[0004] The first aspect of this disclosure provides a sealing cap for a packaging container, comprising:

[0005] A heat-shrinkable film sleeve includes a top opening and a tear line, the tear line extending from the top opening toward the bottom of the heat-shrinkable film sleeve and spaced from the bottom edge of the heat-shrinkable film sleeve; and

[0006] A top film, including a top film body, is fixedly connected to the top of the heat shrinkable film sleeve and covers the top opening and the first end of the tear line near the top opening.

[0007] In some embodiments of the sealing cap, the top film also includes a pull tab connected to the top film body, protruding from the top film body in a direction away from the top film body and separating from the heat shrink film sleeve.

[0008] In some embodiments of the cap, the edge line of the pull tab includes a curved edge line.

[0009] In some embodiments of the sealing cap, the diameter of the arc-shaped edge line is 5-10 mm.

[0010] In some embodiments of the sealing cap, the top opening is a circular hole, and the top film body is a circular film with a diameter larger than the diameter of the top opening.

[0011] In some embodiments of the sealing cap,

[0012] Before the heat-shrinkable film sleeve is heat-shrinked, the length of the tear line is 1 / 3 to 1 / 2 of the distance from the top edge to the bottom edge of the heat-shrinkable film sleeve; and / or

[0013] The tear line includes a plurality of die-cut holes spaced apart along the extension direction of the tear line. Before the heat-shrinkable film is heat-shrinked, the diameter of the die-cut holes is 0.3mm-0.5mm, and the minimum distance between the edges of adjacent die-cut holes is 0.3-0.5mm; and / or

[0014] Before the heat-shrinkable film is heat-shrinked, the distance from the starting position of the tear line to the edge of the top opening is <0.5mm.

[0015] In some embodiments of the sealing cap, the heat shrink film sleeve includes at least one tear strip group, the tear strip group comprising two tear strips spaced apart.

[0016] In some embodiments of the sealing cap, the distance between the two tear lines of the tear line group before the heat shrink film sleeve is heat-shrinked is 10-25mm.

[0017] In some embodiments of the sealing cap, the heat shrink film sleeve includes two tear strip sets located on opposite radial sides of the heat shrink film sleeve.

[0018] In some embodiments of the sealing cap,

[0019] The top membrane also includes a pull tab, which is connected to the top membrane body and protrudes from the top membrane body in a direction away from the top membrane body; wherein...

[0020] The pull tab covers the area above the tear line; or

[0021] The sealing cap includes at least one tear line group, the tear line group includes two tear lines spaced apart, and the pull lug is located between the two tear lines of one tear line group.

[0022] In some embodiments of the sealing cap,

[0023] The heat shrinkable film sleeve is made of sheet film, and the first and second ends of the sheet film that are opposite each other along the length direction are connected end to end and then heated to form the heat shrinkable film sleeve.

[0024] The portion where the first end and the second end of the sheet film are connected is located between the two tear lines of the tear line assembly and below the pull tab.

[0025] In some embodiments of the sealing cap,

[0026] The top film is configured as a non-shrink PET sheet film; and / or

[0027] The thickness of the top membrane is 40-60 μm; and / or

[0028] The top film is bonded to the top of the heat-shrinkable film sleeve by heating.

[0029] A second aspect of this disclosure provides a packaging container, comprising:

[0030] Container body;

[0031] Container lid; and

[0032] The sealing cap according to the first aspect of this disclosure is configured to cover the container lid, or to cover the connection portion of the container lid and the container body that is connected to the container lid.

[0033] Based on the sealing cap provided in this disclosure, a heat-shrinkable film sleeve including a top opening and a tear line, and a top film including a top film body are used, with the top film body covering the first end of the top opening and the tear line near the top opening. This sealing cap facilitates easy tearing of the heat-shrinkable film sleeve using the tear line without the need for auxiliary tools. Furthermore, it allows the top film body to simultaneously protect both the opening of the heat-shrinkable film sleeve and the first end of the tear line near the top opening, thus preventing dust accumulation and avoiding premature tearing of the tear line during handling of the packaging container or when the packaging container is subjected to impact.

[0034] The packaging container disclosed herein includes the sealing cap of this disclosure, thereby having the advantages of the sealing cap of this disclosure.

[0035] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0036] The accompanying drawings, which are included to provide a further understanding of this disclosure and form part of this application, illustrate exemplary embodiments of this disclosure and are used to explain this disclosure, but do not constitute an undue limitation of this disclosure. In the drawings:

[0037] Figure 1 This is a schematic diagram of a portion of the structure of a packaging container according to an embodiment of the present disclosure, showing the container lid and sealing cap;

[0038] Figure 2for Figure 1 The diagram shows a partial structure of the packaging container, with the top film being removed.

[0039] Figure 3 for Figure 1 The top view of the sealing cap of the packaging container shown.

[0040] Figures 1 to 3 In the figures, the labels represent:

[0041] 1. Heat shrink film sleeve; 1a. Top opening; 11. Tear line; 2. Top film; 21. Top film body; 22. Pull ear;

[0042] 30. Container body, 40. Container lid, 50. Label paper. Detailed Implementation

[0043] 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 embodiments of this disclosure, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0044] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this disclosure. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0045] In the description of this disclosure, it should be understood that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this disclosure.

[0046] In the description of this disclosure, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are generally based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this disclosure; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0047] like Figures 1 to 3 As shown, this disclosure provides a sealing cap for a packaging container. The sealing cap includes a heat-shrinkable film sleeve 1 and a top film 2. The heat-shrinkable film sleeve 1 includes a top opening 1a and a tear line 11. The tear line 11 extends from the top opening 1a toward the bottom of the heat-shrinkable film sleeve 1 and is spaced from the bottom edge of the heat-shrinkable film sleeve 1. The top film 2 includes a top film body 21, which is fixedly connected to the top of the heat-shrinkable film sleeve 1 and covers the top opening 1a and the first end of the tear line 11 near the top opening 1a.

[0048] Based on the sealing cap provided in this disclosure, a heat shrinkable film sleeve 1 including a top opening 1a and a tear line 11 and a top film 2 including a top film body 21 are used, and the top film body 21 covers the top opening 1a and the first end of the tear line 11 near the top opening 1a. This sealing cap is advantageous in two ways: firstly, it allows the heat shrinkable film sleeve 1 to be easily torn open without the aid of auxiliary tools using the tear line 11; secondly, it is advantageous in that the top film body 21 simultaneously protects the top opening 1a of the heat shrinkable film sleeve 1 and the first end of the tear line 11 near the top opening 1a, which is beneficial for dust prevention. The gap between the tear line 11 and the bottom edge of the heat shrinkable film sleeve 1 also helps to prevent the tear line 11 from being torn prematurely during the handling of the packaging container or when the packaging container is impacted.

[0049] like Figures 1 to 3 As shown, in some embodiments, the top membrane 2 further includes a pull tab 22. The pull tab 22 is connected to the top membrane body 21 and protrudes from the top membrane body 21 in a direction away from the top membrane body 21 and is separated from the heat shrink film sleeve 1.

[0050] The pull tab 22 helps users quickly peel off the top membrane 2.

[0051] like Figures 1 to 3 As shown, in some embodiments, the edge line of the pull lug 22 includes an arc-shaped edge line.

[0052] The curved edge is smooth, which helps improve safety and prevents users from being scratched by the pull ear 22.

[0053] like Figures 1 to 3As shown, in some embodiments, the diameter of the arcuate edge line is 5-10 mm.

[0054] Setting the diameter of the curved edge line to 5-10mm makes it easier for users to pinch the pull tab 22 with at least two fingers, which helps users apply force.

[0055] like Figures 1 to 3 As shown, in some embodiments, the top opening 1a is a circular hole. The top membrane body 21 is a circular membrane with a diameter larger than that of the top opening 1a.

[0056] Setting the top opening 1a as a circular hole facilitates manufacturing. Furthermore, both the top opening 1a and the top film body 21 are circular. Since a circle has no sharp corners, this design helps to evenly distribute the sealing pressure within the sealing area between the top film body 21 and the top of the heat-shrinkable film sleeve 1, thereby improving the sealing effect of the top film 2 on the top opening 1a.

[0057] like Figures 1 to 3 As shown, in some embodiments, the length of the tear line 11 before heat shrinking the heat shrink film sleeve 1 is 1 / 3 to 1 / 2 of the distance from the top edge to the bottom edge of the heat shrink film sleeve 1.

[0058] This arrangement helps to ensure a suitable gap between the second end of the tear line 11 away from the top opening 1a and the bottom end of the heat shrink film sleeve 1, thereby helping to prevent the heat shrink film sleeve 1 from being torn open prematurely from the second end of the tear line 11 during the handling of the packaging container or when the packaging container is hit.

[0059] like Figures 1 to 3 As shown, in some embodiments, the tear line 11 includes a plurality of die-cut holes spaced apart along the extension direction of the tear line 11. The diameter of the die-cut holes is 0.3mm-0.5mm before the heat-shrinkable film sleeve 1 is heat-shrinked, and the minimum distance between adjacent die-cut holes is 0.3-0.5mm.

[0060] The diameter range of the die-cut holes before heat shrinking the heat shrink film sleeve 1 is set to 0.3mm-0.5mm, and the minimum distance between adjacent die-cut holes is set to 0.3-0.5mm. This allows users to tear the heat shrink film sleeve 1 along the tear line 11 without the aid of tools, while also preventing the tear line 11 from cracking prematurely during collisions or transportation.

[0061] like Figures 1 to 3 As shown, in some embodiments, the distance from the starting position of the tear line 11 before heat shrinking the heat shrink film sleeve 1 to the edge of the top opening 1a is <0.5mm.

[0062] The distance from the starting position of the tear line 11 before heat shrinking the heat shrink film sleeve 1 to the edge of the top opening 1a is less than 0.5mm, which makes it easy for the user to tear the heat shrink film sleeve 1 along the tear line 11 without the need for tools.

[0063] like Figures 1 to 3 As shown, in some embodiments, the heat-shrinkable film sleeve 1 includes at least one tear strip group. The tear strip group includes two tear strips 11 spaced apart.

[0064] By setting the interval structure of the two tear lines 11, it is beneficial to form a more obvious tear area of ​​the heat shrink film sleeve 1, and it is also beneficial to make the strip area formed between the two tear lines 11 easier for the user's fingers to apply force.

[0065] like Figures 1 to 3 As shown, in some embodiments, the distance between the two tear lines 11 of the pre-tear line group before heat shrinking the heat shrink film sleeve 1 is 10-25mm.

[0066] Within this distance range, the heat-shrinkable film sleeve 1 can be shrunk so that the user can apply force precisely. This helps to avoid the need for multiple operations to open the film sleeve due to the large distance, and also helps to avoid the difficulty in finding the point of force application due to the small distance, thereby improving the tearing efficiency.

[0067] like Figures 1 to 3 As shown, in some embodiments, the heat shrink film sleeve 1 includes two tear strip sets. The two tear strip sets are located on opposite radial sides of the heat shrink film sleeve 1.

[0068] This arrangement allows the tear line group on the other side to serve as a substitute tear area to complete the opening process when the tearing process is interrupted due to the curved shrinkage deformation of the heat shrink film sleeve 1 on one side. The two tear line groups located on opposite radial sides of the heat shrink film sleeve 1 help prevent some of the tear lines 11 from accidentally cracking due to excessive density of the tear lines 11.

[0069] like Figures 1 to 3 As shown, in some embodiments, the pull tab 22 covers the tear line 11, or the sealing cap includes at least one tear line group, the tear line group including two tear lines 11 spaced apart, and the pull tab 22 is located between the two tear lines 11 of a tear line group.

[0070] This design allows the user to directly expose the first end of the tear line 11 near the top opening 1a after peeling off the top film 2 with the pull tab 22, thus facilitating the user to quickly proceed with the next step of unpacking.

[0071] like Figure 1 and Figure 2As shown, in some embodiments, the heat-shrinkable film sleeve 1 is made of a sheet film. The first and second ends of the sheet film, which are opposite each other along the length direction, are joined end to end and then heated to form the heat-shrinkable film sleeve 1. The part where the first and second ends of the sheet film are joined is located between the two tear lines 11 of the tear line assembly and below the pull tab 22.

[0072] This design allows the user to easily apply force by holding the double-layered sheet film in the area between the two tear strips 11 of the tear strip assembly. Furthermore, this design facilitates the use of the pull tabs 22 to protect the area where the first and second ends of the sheet film are connected.

[0073] In some embodiments, the top film 2 is configured as a non-shrinkable PET sheet film.

[0074] This arrangement helps maintain the structural shape stability of the top membrane 2 in high-temperature or hot environments and helps maintain the state of the first end of the cover tear line 11.

[0075] In some embodiments, the thickness of the top membrane 2 is 40-60 μm.

[0076] In some embodiments, the top film 2 is bonded to the top of the heat-shrinkable film sleeve 1 by heating. For example, the heat seal strength between the top film 2 and the heat-shrinkable film 1 can be 6~12N / 15mm.

[0077] This design improves the sealing effect of the top membrane 2 on the top opening 1a, and also allows the user to quickly and effortlessly remove the top membrane 2.

[0078] Another aspect of this disclosure provides a packaging container. The packaging container includes a container body 30, a container lid 40, and a sealing cap provided in this disclosure embodiment. The sealing cap is configured to cover the container lid 40, or to cover the connection portion of the container lid 40 and the container body 30 that connects to the container lid 40.

[0079] The packaging container of this disclosure has the advantages of the sealing cap of this disclosure.

[0080] like Figure 1 and Figure 2 As shown, in some embodiments, the packaging container also includes a label 50 located between the top of the container lid 40 and the heat shrink film sleeve 1.

[0081] The following combination Figures 1 to 3 The sealing cap of the packaging container according to the embodiments of this disclosure will be described in detail.

[0082] like Figure 1As shown, the sealing cap includes a heat-shrinkable film sleeve 1 and a top film 2. The heat-shrinkable film sleeve 1 includes a top opening 1a and two tear strip sets. The top opening 1a is circular. The two tear strip sets are located on opposite radial sides of the heat-shrinkable film sleeve 1. Each tear strip set includes two tear strips 11 spaced apart. The tear strips 11 extend from the top opening 1a toward the bottom of the heat-shrinkable film sleeve 1 and are spaced apart from the bottom edge of the heat-shrinkable film sleeve 1. The top film 2 includes a top film body 21 and a pull tab 22. The top film body 21 is fixedly connected to the top of the heat-shrinkable film sleeve 1 and covers the top opening 1a and the first end of the tear strips 11 near the top opening 1a. The pull tab 22 is connected to the top film body 21, protrudes from the top film body 21 in a direction away from the top film body 21 and is separated from the heat-shrinkable film sleeve 1, and the pull tab 22 is located between the two tear strips 11 of one tear strip set.

[0083] Based on the sealing cap provided in this disclosure, a heat-shrinkable film sleeve 1 including a top opening 1a and a tear line 11 and a top film 2 including a top film body 21 are used, with the top film body 21 covering the top opening 1a and the first end of the tear line 11 near the top opening 1a. This sealing cap facilitates easy tearing of the heat-shrinkable film sleeve 1 using the tear line 11 without the need for auxiliary tools. Furthermore, the top film body 21 simultaneously protects the top opening 1a of the heat-shrinkable film sleeve 1 and the first end of the tear line 11 near the top opening 1a, which is beneficial for dust prevention and also helps prevent the tear line 11 from tearing prematurely during handling of the packaging container or when the packaging container is impacted. The pull tab 22 assists the user in quickly peeling off the top film 2 and exposes the first end of the tear line 11 for quick unpacking.

[0084] like Figures 1 to 3 As shown, the edge of the pull tab 22 is partially circular. This circular edge facilitates manufacturing and improves safety, preventing users from being pricked or scratched by the pull tab 22. The pull tab radius is 5-10mm, for example, 8mm.

[0085] In this embodiment, the top film 2 is configured to be made of a non-shrinkable heat-sealable PET film with a thickness of 40-60 μm, for example, 50 μm.

[0086] Heat shrink film 1 is configured as PETG heat shrink film with a thickness of 40-60 μm, for example, 50 μm. Its lateral shrinkage rate at 90°C is greater than 50%.

[0087] like Figure 1 and Figure 2As shown, the heat shrink film sleeve 1 is made of a sheet film. Tear lines 11 are mechanically die-cut onto the sheet film, and the length of the tear lines 11 on the sheet film is 1 / 3 to 1 / 2 of the height of the sheet film (corresponding to the axial direction of the heat shrink film sleeve). The spacing between the two tear lines 11 of a tear line group on the sheet film can be set to 10-25 mm, for example, 20 mm.

[0088] like Figure 1 and Figure 2 As shown, the tear line 11 includes a plurality of die-cut holes spaced apart along its extension direction. The diameter length of the die-cut holes on the die-cut sheet film is 0.3mm-0.5mm, for example, 0.4mm, and the gap length between adjacent die-cut holes (i.e., the minimum distance between the edges of adjacent die-cut holes) is 0.3-0.5mm, for example, 0.4mm. The distance from the starting position of the tear line 11 on the sheet film to one side edge of the top of the heat-shrinkable mold is <0.5mm.

[0089] The first and second ends of the sheet film, which are opposite each other along the length direction, are joined by adhesive and then heated to form a heat-shrinkable film sleeve 1. The connection between the first and second ends of the sheet film is located between the two tear lines 11 of the tear line assembly and below the pull tab 22.

[0090] During manufacturing, the heat-shrinkable film is first placed onto the forming mold, and then heated and shrunk by hot air to form the heat-shrinkable film sleeve 1. The top film 2 is then bonded to the top of the heat-shrinkable film sleeve by heating. The heat seal strength between the top film 2 and the heat-shrinkable film sleeve 1 is 6-12 N / 15 mm.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and not to limit them; although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this disclosure or equivalent substitutions can be made to some technical features, all of which should be covered within the scope of the technical solutions claimed in this disclosure.

Claims

1. A sealing cap for a packaging container, characterized in that, include: A heat-shrinkable film sleeve (1) includes a top opening (1a) and a tear line (11), the tear line (11) extending from the top opening (1a) toward the bottom of the heat-shrinkable film sleeve (1) and spaced from the bottom edge of the heat-shrinkable film sleeve (1); and The top film (2) includes a top film body (21), which is fixedly connected to the top of the heat shrink film sleeve (1) and covers the top opening (1a) and the first end of the tear line (11) near the top opening (1a).

2. The closure cap of claim 1, wherein The top film (2) also includes a pull tab (22), which is connected to the top film body (21), protrudes from the top film body (21) in a direction away from the top film body (21) and separates from the heat shrink film sleeve (1).

3. The closure cap of claim 2, wherein, The edge line of the pull (22) includes an arc-shaped edge line.

4. The closure cap of claim 3, wherein, The diameter of the arc-shaped edge line is 5-10 mm.

5. The closure cap of any one of claims 1-4, wherein, The top opening (1a) is a circular hole, and the top membrane body (21) is a circular membrane with a diameter larger than that of the top opening (1a).

6. The sealing cap according to any one of claims 1-4, characterized in that, Before heat shrinking the heat shrink film sleeve (1), the length of the tear line (11) is 1 / 3 to 1 / 2 of the distance from the top edge of the heat shrink film sleeve (1) to the bottom edge of the heat shrink film sleeve (1); and / or The tear line (11) includes a plurality of die-cut holes spaced apart along the extension direction of the tear line (11). Before the heat-shrinkable film sleeve (1) is heat-shrinked, the diameter of the die-cut holes is 0.3mm-0.5mm, and the minimum distance between the edges of adjacent die-cut holes is 0.3-0.5mm; and / or Before the heat-shrinkable film sleeve (1) is heat-shrinked, the distance from the starting position of the tear line (11) to the edge of the top opening (1a) is <0.5mm.

7. The closure cap of any one of claims 1-4, wherein, The heat shrinkable film sleeve (1) includes at least one tear strip group, which includes two tear strips (11) spaced apart.

8. The closure cap of claim 7, wherein, Before the heat shrink film sleeve (1) is heat-shrinked, the distance between the two tear lines (11) of the tear line group is 10-25mm.

9. The closure cap of claim 7, wherein, The heat shrinkable film sleeve (1) includes two tear strip groups located on opposite radial sides of the heat shrinkable film sleeve (1).

10. The sealing cap according to claim 7, characterized in that, The top membrane (2) further includes a pull tab (22), which is connected to the top membrane body (21) and protrudes from the top membrane body (21) in a direction away from the top membrane body (21); wherein, The pull tab (22) covers the tear line (11); or The sealing cap includes at least one tear line group, the tear line group including two tear lines (11) spaced apart, and the pull lug (22) is located between the two tear lines (11) of one tear line group.

11. The sealing cap according to claim 10, characterized in that, The heat shrinkable film sleeve (1) is made of sheet film. The first and second ends of the sheet film, which are opposite each other along the length direction, are connected end to end and then heated to form the heat shrinkable film sleeve (1). The portion where the first end and the second end of the sheet film are connected is located between the two tear lines (11) of the tear line group and below the pull lug (22).

12. The sealing cap according to any one of claims 1-4, characterized in that, The top film (2) is configured as a non-shrink PET sheet film; and / or The thickness of the top membrane (2) is 40-60 μm; and / or The top film (2) is bonded to the top of the heat shrink film sleeve (1) by heating.

13. A packaging container, characterized in that include: container body(30); Container lid (40); and The sealing cap according to any one of claims 1-12, wherein the sealing cap is configured to cover the container cap (40), or to cover the connection portion of the container cap (40) and the container body (30) connected to the container cap (40).

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