Patent Application
20160207255
The invention relates to an encapsulation structure for a container, and more particularly, to an encapsulation structure for a container that is environmentally friendly, reduces used materials, may be partially recyclable, and may securely seal the container.
Before conventional encapsulation structures for containers are heated by electromagnetic induction, a foamed-plastic layer, a paper layer, a wax layer, a plastic protective film, an aluminum layer, and a heat-sealing adhesive layer are sequentially arranged from the cap to the rim; after being heated by electromagnetic induction, the wax layer melts and is absorbed by the paper layer, and the aluminum layer is sealed on the rim by the heat-sealing adhesive layer and the foamed-plastic layer is deposited in the cap. However, since conventional encapsulation structures for containers use wax layers that are not readily decomposable, they are not environmentally friendly; in addition, due to the usage of such wax layers in conventional encapsulation structures for containers, paper layers are required to be added to absorb the melted wax layers, which further consumes more materials. Furthermore, as conventional encapsulation structures for containers use wax layers, after the paper layer absorbs the melted wax layer, the conventional encapsulation structure may become moldy when used in containers with liquid, and thus the foamed-plastic layers of conventional encapsulation structures may not be recycled; moreover, as conventional encapsulation structures for containers use wax layers, the adhesion of such wax layers may be improperly stripped off due to the temperature of shipment or storage being too high. In addition, since conventional encapsulation structures for containers have poor heat conduction for rims of large areas, it is difficult for the wax layer to melt and causes the wax layer to be difficult to be stripped off and the cap to be unable to open.
Therefore, an encapsulation structure for a container that is environmentally friendly, reduces used materials, may be partially recyclable, and may securely seal the container shall be disclosed by the present invention.
In view of the above shortcomings of prior art, great research effort was devoted to overcome such imperfections, and an encapsulation structure for a container that achieves the purposes of being environmentally friendly, reducing used materials, being partially recyclable, and securely sealing the container is developed.
To achieve the above and other purposes, an encapsulation structure for a container in the present invention is provided to comprise: a sealing layer, having an aluminum layer and a heat-sealing adhesive layer, wherein the aluminum layer is sealed on a rim of the container by the heat-sealing adhesive layer; a strippable foamed-plastic layer, deposited in a cap of the container; and a strippable adhesive layer, wherein the strippable foamed-plastic layer is adhered to the aluminum layer by the strippable adhesive layer, and the adhesion force of the strippable adhesive layer is smaller than the adhesion force of the heat-sealing adhesive layer.
In the above encapsulation structure for a container, a plastic protective film is deposited on top of the aluminum layer, and the strippable foamed-plastic layer is adhered to the plastic protective film by the strippable adhesive layer.
In the above encapsulation structure for a container, the plastic protective film is transparent.
In the above encapsulation structure for a container, a pattern layer is deposited on top of the strippable foamed-plastic layer and the pattern layer faces the aluminum layer.
In the above encapsulation structure for a container, a pattern layer is deposited on top of the strippable foamed-plastic layer and the pattern layer faces the plastic protective film.
In the above encapsulation structure for a container, the strippable adhesive layer is a strippable polyurethane (PU) adhesive layer.
By the above embodiments, the encapsulation structure for a container of the present invention may be environmentally friendly, reduce used materials, be partially recyclable, and securely seal the container.
The purposes, features, and effects of the invention may be more fully understood by the subsequent detailed description and embodiments with references made to the accompanying drawings.
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As described in above, as the encapsulation structure of the present invention does not use wax, it is environmentally friendly; in addition, as the encapsulation structure of the present invention does not use wax, a paper layer is also not required to be used in the encapsulation structure of the present invention, and thus used materials may be reduced. Furthermore, as the encapsulation structure of the present invention does not use wax, the strippable foamed-plastic layer 2 does not have to contain paper and may be recycled; moreover, as the encapsulation structure of the present invention uses the strippable adhesive layer 3 instead of wax, the encapsulation structure of the present invention is less affected by temperature and may have more stable adhesion force to securely seal the rim 51 and facilitate the opening of the cap 52.
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While the invention has been described by way of example and in terms of the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. To the contrary, it is intended to cover various modifications and similar arrangements as would be apparent to those skilled in the art. Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.
