Hot melting integrated sealing assembly and container comprising same

Abstract

The utility model relates to packaging, in particular to a hot melting integrated type sealing assembly and a container comprising the same, the sealing assembly comprises a metal cover body and a thermoplastic elastic sealing unit, the inner surface of the metal cover body is provided with a hot melting functional layer, and the hot melting functional layer is a polyethylene or polypropylene coating; the thermoplastic elastic sealing unit is pre-arranged at the bottom of an inner cavity of the metal cover body; and when the metal cover body is jointed with the port of the container and is subjected to heat treatment, the upper interface of the thermoplastic elastic sealing unit and the hot melting functional layer are integrally combined through fusion bonding. Compared with the prior art, the problem that the gasket is easy to fall off and lose is solved; the sealing unit can form effective sealing when being pressed, so that the sealing performance is enhanced; installation procedures are reduced, and the damage risk in production, transportation and storage is reduced; and the packaging bag is suitable for various containers and has excellent comprehensive performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to a package, specifically a hot melt integrated sealing assembly and a container comprising the same. BACKGROUND

[0002] In the packaging industry, the sealing performance of containers is crucial for protecting the quality of the internal goods, preventing leakage, and ensuring the safe storage and transportation of products. Traditional container sealing methods often use gaskets inside the bottle cap, among which thermoplastic elastomer gaskets are widely used due to their good elasticity and sealing performance.

[0003] However, with the development of the packaging industry and the increasing demand of consumers for product quality and user experience, the existing sealing technology based on thermoplastic elastomer gaskets gradually exposes many drawbacks. From the aspect of structural connection, the adhesion between the thermoplastic elastomer gasket and the bottle cap is insufficient, and during the opening of the bottle cap, the gasket is easily separated and detached from the bottle cap. This not only brings inconvenience to the user and affects the convenience of product use, but also reduces the user experience. Moreover, the detached gasket is small in size and irregular in shape, and is easy to lose, which leads to the inability of the container to be effectively sealed again, affecting the reusability of the product, and may also cause secondary pollution of the contents.

[0004] From the perspective of hygiene, the gasket is easily in contact with the outside world during the opening process, thereby contaminating dust, impurities, and other pollutants. When sealed again, these pollutants may enter the container, posing a threat to the purity and safety of the contents, especially for products such as food and medicine that have strict hygiene requirements, this problem is more prominent.

[0005] In the production and manufacturing link, the installation of traditional gaskets requires additional processes, increasing production costs and time costs. At the same time, the instability and easy detachment of the gasket during transportation and storage also increase the risk of product damage, which is not conducive to the production management and cost control of enterprises. SUMMARY

[0006] To solve the above problems or one of the problems, the utility model discloses a hot melt integrated sealing assembly, the technical scheme adopted is:

[0007] A hot melt integrated sealing assembly, comprising a metal cover body and a thermoplastic elastomeric sealing unit, characterized in that:

[0008] The inner surface of the metal cover body is provided with a hot melt functional layer, and the hot melt functional layer is a polyethylene or polypropylene coating;

[0009] The thermoplastic elastomeric sealing unit is prepositioned at the bottom of the inner cavity of the metal cover body;

[0010] When the metal cover is engaged with the port of the container and subjected to heat treatment, the upper interface of the thermoplastic elastomeric sealing unit is integrally combined with the hot melt functional layer by melt bonding.

[0011] Further, the thermoplastic elastomeric sealing unit is a planar sealing module, which is in the shape of a disc or a ring in cross section, and the bottom thereof is plastically expanded radially to form a closed sealing ring around the port of the container under pressure.

[0012] Further, the planar sealing module is formed by a punching or injection molding process of a thermoplastic elastomer, and the difference between the maximum outer diameter of the module and the diameter of the inner cavity of the metal cover is 0.1-0.5mm.

[0013] Further, the thermoplastic elastomeric sealing unit is a plug-in sealing module, which includes an integrally formed top joint and a plug-in part; the outer diameter of the plug-in part is greater than the inner diameter of the port of the container by 0.3-1.0mm, and the plug-in part is deformed and embedded in the port of the container under pressure; and the upper surface of the top joint is bonded and fixed with the hot melt functional layer of the metal cover.

[0014] Further, the plug-in sealing module is formed by an injection molding process, and the difference between the outer diameter of the top joint of the module and the diameter of the inner cavity of the metal cover is 0.1-0.5mm.

[0015] A packaging container, which is different from the prior art in that it is equipped with the hot melt integrated sealing assembly, and the container includes any one of a bottle, a can or a tubular container.

[0016] Compared with the prior art, the hot melt integrated sealing assembly of the utility model integrates the thermoplastic elastomeric sealing unit and the metal cover by hot melt bonding, solves the problem of easy falling and loss of the gasket, forms effective sealing of the sealing unit under pressure, enhances the sealing performance, reduces the installation process, reduces the damage risk in production, transportation and storage, guarantees the hygiene and safety of the contents, is suitable for various containers, and has superior comprehensive performance. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of the metal cover of embodiment 1 before being combined with the neck of the bottle.

[0018] Figure 2 is a structural schematic view of the thermoplastic elastomeric gasket of embodiment 1 before the metal cover is combined with the neck of the bottle.

[0019] Figure 3 is a structural schematic view of the metal cover of embodiment 1 after being combined with the neck of the bottle and being subjected to heat.

[0020] Figure 4 is a structural schematic view of the thermoplastic elastomeric gasket of embodiment 1 after the metal cover is combined with the neck of the bottle and is subjected to heat.

[0021] Figure 5 This is a schematic diagram of the structure of the metal cap of Example 2 before it is combined with the bottle neck.

[0022] Figure 6 This is a schematic diagram of the thermoplastic elastomer gasket before the metal cap is joined to the bottle neck in Example 2.

[0023] Figure 7 This is a schematic diagram of the structure of Example 2 after the metal cap is combined with the bottle neck and heated.

[0024] Figure 8 This is a schematic diagram of the structure of the thermoplastic elastomer gasket after the metal cap of Example 2 is combined with the bottle neck and heated. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings.

[0026] Example 1, such as Figures 1-4 The illustrated thermoplastic integrated sealing assembly includes a metal cap 1 and a thermoplastic elastic sealing unit. The thermoplastic elastic sealing unit is a planar sealing module 2 with a disc-shaped or annular cross-section. Under pressure, its bottom undergoes radial plastic expansion to form a closed sealing ring surrounding the port of the container 3. The inner surface of the metal cap 1 is provided with a thermoplastic functional layer, which is a polyethylene or polypropylene coating. The thermoplastic elastic sealing unit is pre-positioned at the bottom of the inner cavity of the metal cap 1. When the metal cap 1 is engaged with the port of the bottle 3 and subjected to heat treatment, the upper interface of the thermoplastic elastic sealing unit and the thermoplastic functional layer are integrally bonded together through fusion bonding.

[0027] In another preferred embodiment, the planar sealing module 2 is formed from a thermoplastic elastomer by punching or injection molding, and the difference between its maximum outer diameter and the inner diameter of the metal cover 1 is 0.1-0.5 mm.

[0028] Example 2, as Figures 5-8 The hot-melt integrated sealing assembly shown differs from Embodiment 1 in that the thermoplastic elastic sealing unit is a plug-in sealing module 4, including an integrally formed top part 41 and a plug part 42; the outer diameter of the plug part 42 is 0.3-1.0 mm larger than the inner diameter of the container port, and deforms and embeds into the container port when under pressure; the upper surface of the top part 41 is bonded and fixed to the hot-melt functional layer of the metal cover 1.

[0029] In another preferred embodiment, the plug-in sealing module 4 is formed by injection molding, and the difference between the outer diameter of its top part 41 and the inner diameter of the metal cover 1 is 0.1-0.5 mm.

[0030] Thermoplastic elastomer is briefly introduced here. Thermoplastic elastomer (TPE / TPR) is also called artificial rubber or synthetic rubber. It has high elasticity, aging resistance and excellent oil resistance of traditional cross-linking vulcanized rubber, and the characteristics of easy processing and various processing methods of ordinary plastic. TPE / TPR materials can be processed by injection molding, extrusion, blow molding and other methods, and the water port corner powder can be directly reused at 100%, which simplifies the processing flow and reduces the cost. At present, TPE / TPR materials have become the preferred material to replace traditional rubber. It is environmentally friendly, non-toxic, comfortable to touch, and has a beautiful appearance, which can add more creativity to product design. It is a new type of synthetic material with more humanization and high grade, and also belongs to environmentally friendly materials that meet international standards.

[0031] The adhesion principle and condition of the two embodiments: when the metal cover 1 is combined with the bottle 3 and heated, whether the upper surface of the thermoplastic elastomer flat sealing module 2 or the upper surface of the top joint part 41 of the thermoplastic elastomer plug-in sealing module 4 will be naturally adhered to the PE or PP surface layer of the lower surface of the top piece of the metal cover 1. The heating methods here are various, including the heat generated during microwave sterilization and steam sterilization, and the heat received by the bottle cap and the sealing module through the hot air channel. As long as the temperature is above 60 degrees Celsius, the two will naturally adhere to each other.

[0032] The above is the preferred embodiment of the present application. The present application is not limited to the above embodiments. Any person skilled in the art, without departing from the technical scheme of the present application, according to the technical content disclosed above, the changes, modifications or equivalent embodiments of the technical scheme of the present application, all within the protection scope of the present application. For example, more than one external thread is arranged on the inner side of the skirt of the thermoplastic elastomer flat sealing module, and the corresponding internal thread is arranged on the bottle mouth of the packaging bottle. In short, any simple modification, equivalent replacement, equivalent change and modification of the above embodiments without departing from the technical essence of the present application are within the protection scope of the technical scheme of the present application.

Claims

1. A hot-melt integrated sealing assembly comprising a metal cap body (1) and a thermoplastic elastomeric sealing unit, characterized in that: the inner surface of the metal cap body (1) is provided with a hot-melt functional layer, which is a polyethylene or polypropylene coating; the thermoplastic elastomeric sealing unit is pre-positioned at the bottom of the inner cavity of the metal cap body (1); when the metal cap body (1) is engaged with the port of a container and subjected to heat treatment, the upper interface of the thermoplastic elastomeric sealing unit is integrally bonded with the hot-melt functional layer through molten adhesion. The thermoplastic elastomeric sealing unit is a planar sealing module (2) with a cross-section in the shape of a disc or a ring, which, in a compressed state, has a radially plastic expansion at the bottom to form a closed sealing ring around the port of the container. The planar sealing module (2) is formed by a hot-melt elastomer through a punching or injection molding process, with a maximum outer diameter that is 0.1-0.5 mm different from the inner diameter of the cavity of the metal cap body (1). The thermoplastic elastomeric sealing unit is a plug-in sealing module (4) comprising an integrally formed top abutment (41) and a plug-in portion (42); the outer diameter of the plug-in portion (42) is 0.3-1.0 mm larger than the inner diameter of the port of the container, and it deforms and embeds into the port of the container when compressed; the upper surface of the top abutment (41) is adhesively fixed with the hot-melt functional layer of the metal cap body (1).

2. The hot melt integrated seal assembly of claim 1, wherein: The plug-in sealing module (4) is formed by an injection molding process, with an outer diameter of the top abutment (41) that is 0.1-0.5 mm different from the inner diameter of the cavity of the metal cap body (1).

3. The hot melt integrated seal assembly of claim 2, wherein: The container, which is equipped with the hot-melt integrated sealing assembly according to any one of claims 1-5, comprises any one of a bottle, a can, or a tubular container.

4. The hot melt integrated seal assembly of claim 1, wherein: ​ 5. The hot melt integrated seal assembly of claim 4, wherein: ​ 6. A packaging container characterized in that: ​

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