Sealing gasket

Abstract

The utility model relates to the technical field of packaging, in particular to a sealing gasket which comprises a sealing assembly, the sealing assembly is used for sealing a bottle body, and the sealing assembly sequentially comprises a hot melt adhesive cast film layer, a first barrier layer, an aluminum foil layer and a printing paperboard layer which are fixedly connected in the direction away from the bottle body; the aluminum foil layer is used for receiving electromagnetic waves to generate heat, heat is sequentially transmitted to the first blocking layer and the hot melt adhesive cast film layer, and the hot melt adhesive cast film layer is used for being fixedly bonded with a bottle body. According to the bottle cap sealing device, the sealing gasket is arranged between the bottle body and the bottle cap by a worker, and the bottle cap is screwed, so that the sealing gasket tightly abuts against the bottle body; then, under the action of an electromagnetic field, the aluminum foil is heated, heat is sequentially transmitted to the first barrier layer and the hot melt adhesive cast film layer, and the hot melt adhesive cast film layer is bonded and fixed to the bottle body after being heated and melted; therefore, the sealing gasket and the bottle body are bonded and fixed by a worker, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the packaging technical field, especially to a sealing gasket. BACKGROUND

[0002] The sealing gasket is mainly applied to the sealing of the bottle mouth of the bottled product such as medicine and food. The sealing gasket is generally composed of a paperboard layer, an aluminum film layer and a barrier layer. The paperboard layer improves the thickness and resilience, and the aluminum film layer and the barrier layer are used to block the gas and water vapor from entering or escaping from the bottle mouth.

[0003] The sealing gasket is generally directly placed on the bottle mouth of the bottle body, or the sealing gasket is fixed by bonding with the bottle mouth. When the sealing gasket is fixed by bonding with the bottle mouth of the bottle body, an adhesive needs to be pre-applied on the bottle mouth or the sealing gasket to bond the sealing gasket with the bottle body.

[0004] In the above operation, the bonding step of the sealing gasket with the bottle body is complicated, thereby affecting the sealing efficiency of the bottle mouth of the bottled product. Meanwhile, the adhesive is generally an organic substance, so that the bottle mouth has an odor. CONTENT OF THE INVENTION

[0005] In order to improve the packaging efficiency of the bottled product, the present application provides a sealing gasket.

[0006] The present application provides a sealing gasket, which adopts the following technical scheme:

[0007] A sealing gasket is arranged between a bottle body and a bottle cap, and is used to seal the bottle mouth of the bottle body. The sealing gasket comprises a sealing assembly, which is used to seal the bottle body and comprises, in sequence along the direction away from the bottle body, a hot melt adhesive flow casting film layer, a first barrier layer, an aluminum foil layer and a printed paperboard layer. The aluminum foil layer is used to receive electromagnetic waves to generate heat, and the heat is sequentially transmitted to the first barrier layer and the hot melt adhesive flow casting film layer. The hot melt adhesive flow casting film layer is used to bond and fix with the bottle body.

[0008] By adopting the above technical scheme, the sealing gasket is arranged between the bottle body and the bottle cap by the worker, and the bottle cap is screwed tightly, so that the sealing gasket is tightly abutted with the bottle body. Then, under the action of the electromagnetic field, the aluminum foil generates heat and sequentially transmits the heat to the first barrier layer and the hot melt adhesive flow casting film layer. The hot melt adhesive flow casting film layer is bonded and fixed with the bottle body after being heated and melted. Therefore, the worker bonds and fixes the sealing gasket with the bottle body, and the working efficiency is improved. Meanwhile, the hot melt adhesive flow casting film layer is non-toxic and odorless, so that the safety of the bottled product can be improved.

[0009] The first barrier layer is composed of a material with high barrier property, such as polyester (PET) or other plastic film. The first barrier layer can have an additional barrier effect to prevent the gas and moisture from penetrating into or escaping from the sealing gasket.

[0010] Optionally, the hot melt adhesive casting film layer has a plurality of protrusions on the side away from the first barrier layer, and the plurality of protrusions are arranged in a ring at intervals, the protrusions being used to bond and fix to the bottle body.

[0011] By adopting the above technical solution, and by setting protrusions on the hot melt adhesive casting film, the bonding strength between the hot melt adhesive casting film and the bottle body can be locally improved, thereby improving the sealing performance between the sealing component and the bottle body.

[0012] Optionally, the sealing gasket may further include a reinforcing component, the reinforcing component including a reinforcing cardboard layer disposed on the side of the sealing component away from the bottle body; the reinforcing cardboard layer is used to compress the sealing component.

[0013] By adopting the above technical solution, the reinforced cardboard layer is used as the top layer of the sealing gasket, providing the sealing gasket with a certain thickness and elasticity, helping to fill the gap between the bottle mouth and the bottle cap, so as to ensure the sealing of the sealing component and the bottle body.

[0014] Optionally, the surface of the reinforced cardboard layer is provided with a plurality of folding grooves, the plurality of folding grooves are arranged linearly, and the plurality of folding grooves are connected to form a fold line; the two ends of the fold line are along the outer edge of the reinforced cardboard layer, the reinforced cardboard layer is separated along the fold line, and the reinforced cardboard layer forms a piercing sharp corner around the fold line.

[0015] By adopting the above technical solution, a fold line is set on the surface of the reinforced cardboard layer, which makes it easy for the user to fold the reinforced cardboard layer to expose the piercing sharp corner of the edge of the reinforced cardboard layer; thus, the user can use the piercing sharp corner of the reinforced cardboard layer to cut open the sealing component, which makes it easy for the staff to tear the sealing component off the bottle mouth.

[0016] Optionally, the folding grooves at both ends of the fold line are connected to the outer periphery of the reinforcing cardboard layer.

[0017] By adopting the above technical solution, the folding grooves at both ends of the folding line are connected to the outer periphery of the reinforcing cardboard layer. Thus, when the worker breaks the reinforcing cardboard layer, the sharpness of the piercing corner can be increased, making it easier to pierce the sealing component.

[0018] Optionally, the fold line is an arc-shaped line, and the opening direction of the fold line is set towards the edge of the reinforcing cardboard layer; the curvature of the fold line is adapted to the shape of a human finger.

[0019] By adopting the above technical solution, the curvature of the fold line is adapted to the shape of human fingers, which makes it easier for users to break the reinforced cardboard layer. On the other hand, the curved fold line can also increase the sharpness of the piercing corner, making it easier for users to pierce the sealing component.

[0020] Optionally, a second barrier layer is also included, which is composite with the reinforcing cardboard layer, and the second barrier layer is disposed on the side of the reinforcing cardboard layer near the sealing component.

[0021] By adopting the above technical solution, the second barrier layer is made of a material with high barrier performance, such as polyester (PET) or other plastic film; the second barrier layer can play an additional barrier effect, preventing gas, moisture and other substances from entering or escaping through the sealing gasket.

[0022] Optionally, the sealing assembly further includes a wax layer disposed on the side of the printed cardboard layer near the second barrier layer, the wax layer being used to bond the printed cardboard layer to the second barrier layer.

[0023] By adopting the above technical solution, the sealing component and the reinforcing component are bonded together by a wax layer, making it easier for workers to place the sealing gasket between the bottle body and the cap. At the same time, the connection between the wax layer and the reinforcing component is a weak connection, making it easy for workers to separate the reinforcing component from the sealing component.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. The worker places the sealing gasket between the bottle body and the bottle cap, and tightens the bottle cap to ensure a tight seal between the sealing gasket and the bottle body. Then, under the action of an electromagnetic field, the aluminum foil heats up and transfers the heat sequentially to the first barrier layer and the hot melt adhesive casting film layer. After the hot melt adhesive casting film layer melts upon heating, it adheres and fixes to the bottle body. This allows the worker to adhere and fix the sealing gasket to the bottle body, improving work efficiency.

[0026] 2. By setting protrusions on the hot melt adhesive cast film, the bonding strength between the hot melt adhesive cast film and the bottle body can be locally improved, thereby improving the sealing performance between the sealing component and the bottle body;

[0027] 3. By setting fold lines on the surface of the reinforced cardboard layer, users can easily break the reinforced cardboard layer to expose the piercing sharp corners of the reinforced cardboard layer's edges; thus, users can use the piercing sharp corners of the reinforced cardboard layer to cut open the sealing component, making it easier for staff to tear the sealing component off the bottle opening. Attached Figure Description

[0028] Figure 1 This is a schematic diagram illustrating the installation position of the sealing gasket in Example 1.

[0029] Figure 2 This is a schematic diagram illustrating the sealing gasket structure in Example 1.

[0030] Figure 3This is a schematic diagram illustrating the sealing gasket structure in Example 2.

[0031] Figure 4 This is an exploded view illustrating the sealing gasket structure in Example 3.

[0032] Figure 5 This is a schematic diagram illustrating the sealing gasket structure in Example 3.

[0033] Figure 6 This is a schematic diagram illustrating the sealing gasket structure in Example 4.

[0034] Figure 7 This is a schematic diagram of the structure after the reinforced cardboard layer in Example 4 is broken.

[0035] Figure 8 This is a schematic diagram of the working state after the reinforced cardboard layer is broken in Example 4.

[0036] Explanation of reference numerals in the attached drawings: 1. Sealing component; 11. Hot melt adhesive cast film layer; 111. Protrusion; 12. First barrier layer; 13. Aluminum foil layer; 14. Printed cardboard layer; 15. Wax layer; 2. Reinforcing component; 21. Reinforcing cardboard layer; 211. Fold groove; 212. Fold line; 213. Pierced corner; 22. Second barrier layer; 3. Bottle body; 4. Bottle cap. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1 -8 provides further details regarding this application.

[0038] This application discloses a sealing gasket. (Refer to...) Figure 1 A sealing gasket is placed between the bottle body 3 and the bottle cap 4. The sealing gasket is used to seal the opening of the bottle body 3. (See reference...) Figure 2 The sealing gasket includes a sealing component 1 and a reinforcing component 2.

[0039] Reference Figure 2 The sealing assembly 1 is used to seal the bottle body 3. Along the direction away from the bottle body 3, the sealing assembly 1 includes, in sequence, a hot melt adhesive cast film layer 11, a first barrier layer 12, an aluminum foil layer 13, and a printed cardboard layer 14 that are fixedly connected.

[0040] The aluminum foil layer 13 is made of aluminum foil and is used to receive electromagnetic waves to generate heat. The heat is then transferred to the first barrier layer 12.

[0041] The first barrier layer 12 is made of a material with high barrier properties, such as polyester (PET), EVOH (ethylene-vinyl alcohol copolymer), PET (polyethylene terephthalate) or other plastic films; the first barrier layer 12 can provide additional barrier effect to prevent gases, moisture and other substances from entering or escaping through the sealing gasket.

[0042] The hot melt adhesive cast film layer 11 is made of hot melt adhesive cast film material. After the hot melt adhesive cast film layer 11 melts, it is bonded and fixed to the bottle body 3, thereby allowing the sealing component 1 to seal the bottle opening of the bottle body 3.

[0043] The printed paperboard layer 14 can provide a printing medium for product information such as brand logos and production information.

[0044] Reference Figure 2 The reinforcing component 2 includes a reinforcing cardboard layer 21, which is disposed on the side of the sealing component 1 away from the bottle body 3; the reinforcing cardboard layer is used to compress the sealing component 1. The reinforcing cardboard layer 21 can be made of multiple layers of cardboard, and the reinforcing cardboard layer has a certain thickness and elasticity, so that the sealing component 1 is in close contact with the bottle body 3.

[0045] The implementation principle of a sealing gasket in this application embodiment is as follows:

[0046] Reference Figure 1 The staff placed the sealing gasket between the bottle body 3 and the bottle cap 4, and tightened the bottle cap 4 so that the sealing gasket and the bottle body 3 were in close contact.

[0047] Reference Figure 2 The reinforcing cardboard layer 21 serves as the top layer of the sealing gasket, providing a certain thickness and elasticity to help fill the gap between the bottle mouth and the bottle cap 4, thereby ensuring the sealing performance between the sealing component 1 and the bottle body 3.

[0048] Reference Figure 2 Subsequently, staff can use an electromagnetic induction sealing machine to process the bottles. The electromagnetic induction sealing machine generates an electromagnetic field. Under the action of the electromagnetic field, the aluminum foil layer 13 heats up and sequentially transfers the heat to the first barrier layer 12 and the hot melt adhesive casting film layer 11. After the hot melt adhesive casting film layer 11 melts, it adheres and fixes to the bottle body 3. This allows staff to adhere and fix the sealing gasket to the bottle body 3, improving work efficiency. At the same time, the hot melt adhesive casting film layer 11 is non-toxic and odorless, which can improve the safety of bottled products.

[0049] Example 2

[0050] The difference between Example 2 and Example 1 is as follows:

[0051] Reference Figure 3 In this embodiment, the hot melt adhesive cast film layer 11 has a plurality of protrusions 111 on the side away from the first barrier layer 12. The plurality of protrusions 111 are arranged in a ring at intervals and are used to bond and fix to the bottle body 3. That is, by providing protrusions 111 on the hot melt adhesive cast film, the bonding strength between the hot melt adhesive cast film and the bottle body 3 can be locally improved, thereby improving the sealing performance between the sealing component 1 and the bottle body 3.

[0052] The implementation principle of a sealing gasket in this application embodiment is as follows:

[0053] Reference Figure 3 By setting protrusions 111 on the hot melt adhesive casting film, the bonding strength between the hot melt adhesive casting film and the bottle body 3 can be locally improved, thereby improving the sealing performance between the sealing component 1 and the bottle body 3.

[0054] Example 3

[0055] The difference between Example 3 and Example 1 is as follows:

[0056] Reference Figure 4 and Figure 5 The reinforcing component 2 also includes a second barrier layer 22, which is composite with the reinforcing cardboard layer, and the second barrier layer 22 is disposed on the side of the reinforcing cardboard layer close to the sealing component 1.

[0057] Reference Figure 4 and Figure 5 Meanwhile, the sealing assembly 1 also includes a wax layer 15, which is disposed on the side of the printed cardboard layer 14 near the second barrier layer 22. The wax layer 15 is used to bond the printed cardboard layer 14 to the second barrier layer 22. When the aluminum foil layer 13 heats up under the action of electromagnetic waves, the heat of the aluminum foil layer 13 is transferred to the wax layer 15, and the wax layer 15 softens after heating. The printed cardboard layer 14 absorbs the wax in the wax layer 15, so that the wax layer 15 is bonded and fixed to the printed cardboard layer 14. At the same time, the wax layer 15 is also bonded and fixed to the second barrier film. The bonding strength between the wax layer 15 and the printed cardboard layer 14 is greater than the bonding strength between the wax layer 15 and the second barrier film.

[0058] Reference Figure 4 and Figure 5 The sealing component 1 and the reinforcing component 2 are bonded together by the wax layer 15, making it easier for workers to place the sealing gasket between the bottle body 3 and the bottle cap 4. At the same time, the connection between the wax layer 15 and the reinforcing component 2 is a weak connection, making it easy for workers to separate the reinforcing component 2 from the sealing component 1.

[0059] The implementation principle of a sealing gasket in this application embodiment is as follows:

[0060] Reference Figure 4 and Figure 5 When the user opens the bottle cap 4 and breaks or tears off the sealing component 1, if the contents (medicine or food) of the bottle cannot be used up in sequence, the user can place the reinforcing component 2 between the bottle body 3 and the bottle cap 4. The second barrier layer 22, like the first barrier layer 22, is made of a high-barrier material. The second barrier layer 22 provides an additional barrier effect, preventing gas and moisture from entering or escaping through the sealing gasket. The reinforcing component 2 provides a secondary leak-proof function.

[0061] Example 4

[0062] The difference between Example 4 and Example 1 is as follows:

[0063] When the sealing component 1 has high structural strength and strong adhesion to the bottle body 3, it is difficult for the user to tear open the sealing component 1. Therefore, this application makes further modifications to the sealing gasket.

[0064] Reference Figure 6 and Figure 7 The surface of the reinforced cardboard layer is provided with several folding grooves 211, which are arranged linearly and connected to form a folding line 212. The two ends of the folding line 212 are along the outer edge of the reinforced cardboard layer, and the reinforced cardboard layer is separated along the folding line 212. The reinforced cardboard layer forms a piercing sharp corner 213 around the folding line 212.

[0065] Reference Figure 6 and Figure 7 In this embodiment, the folding groove 211 near the outer periphery of the reinforcing cardboard layer is connected to the outer periphery of the reinforcing cardboard layer to increase the sharpness of the piercing corner 213. In this embodiment, the fold line 212 is an arc-shaped line, and the opening direction of the fold line 212 is set towards the edge of the reinforcing cardboard layer; the curvature of the fold line 212 is adapted to the shape of a human finger.

[0066] The implementation principle of a sealing gasket in this application embodiment is as follows:

[0067] Reference Figure 6 and Figure 7 By setting a fold line 212 on the surface of the reinforced cardboard layer, it is easy for the user to fold the reinforced cardboard layer to expose the puncture sharp corner 213 of the edge of the reinforced cardboard layer.

[0068] Reference Figure 6 and Figure 7 The curvature of the fold line 212 is designed to fit the shape of a human finger, making it easier for the user to break the reinforced cardboard layer. On the other hand, the curved shape of the fold line 212 also increases the sharpness of the piercing tip 213, making it easier for the user to pierce the sealing component 1.

[0069] Reference Figure 8 This allows the user to use the piercing corner 213 of the reinforced cardboard layer to cut open the sealing component 1, making it easier for staff to tear the sealing component 1 off the bottle opening.

[0070] It is worth noting that the sealing gasket in this application embodiment is suitable for situations where the medicine or food in the bottle needs to be used up in a short time.

[0071] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A sealing gasket, wherein the sealing gasket is disposed between the bottle body (3) and the bottle cap (4), and the sealing gasket is used to seal the bottle opening of the bottle body (3); characterized in that: The sealing gasket includes a sealing assembly (1) for sealing the bottle body (3). Along the direction away from the bottle body (3), the sealing assembly (1) includes, in sequence, a hot melt adhesive cast film layer (11), a first barrier layer (12), an aluminum foil layer (13), and a printed cardboard layer (14) that are fixedly connected. The aluminum foil layer (13) is used to receive electromagnetic waves to generate heat, and the heat is transferred in sequence to the first barrier layer (12) and the hot melt adhesive cast film layer (11). The hot melt adhesive cast film layer (11) is used to bond and fix to the bottle body (3).

2. The sealing gasket according to claim 1, characterized in that: The hot melt adhesive casting film layer (11) has a plurality of protrusions (111) on the side away from the first barrier layer (12). The plurality of protrusions (111) are arranged in a ring at intervals. The protrusions (111) are used to bond and fix to the bottle body (3).

3. The sealing gasket according to claim 1, characterized in that: The sealing gasket also includes a reinforcing component (2), which includes a reinforcing cardboard layer (21) disposed on the side of the sealing component (1) away from the bottle body (3); the reinforcing cardboard layer is used to compress the sealing component (1).

4. The sealing gasket according to claim 3, characterized in that: The surface of the reinforced cardboard layer is provided with a plurality of folding grooves (211), the plurality of folding grooves (211) are arranged linearly, and the plurality of folding grooves (211) are connected to form a fold line (212); the two ends of the fold line (212) are along the outer edge of the reinforced cardboard layer, the reinforced cardboard layer is separated along the fold line (212), and the reinforced cardboard layer forms a piercing sharp corner (213) around the fold line (212).

5. The sealing gasket according to claim 4, characterized in that: The folding grooves (211) at both ends of the fold line (212) are connected to the outer periphery of the reinforced cardboard layer.

6. The sealing gasket according to claim 4, characterized in that: The fold line (212) is an arc-shaped line, and the opening direction of the fold line (212) is set towards the edge of the reinforced cardboard layer; the curvature of the fold line (212) is adapted to the shape of human fingers.

7. The sealing gasket according to claim 3, characterized in that: It also includes a second barrier layer (22), which is composite with the reinforcing cardboard layer, and the second barrier layer (22) is disposed on the side of the reinforcing cardboard layer near the sealing component (1).

8. The sealing gasket according to claim 7, characterized in that: The sealing assembly (1) further includes a wax layer (15) disposed on the side of the printed cardboard layer (14) near the second barrier layer (22), and the wax layer (15) is used to bond the printed cardboard layer (14) to the second barrier layer (22).

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