A container with lid packing with increased sealing force and a container manufacturing method

Abstract

The present invention relates to a container having a packing for a cap with increased sealing power, comprising: a container body for receiving contents; a cap mounted on an opening of the container body; and a packing mounted on the inner side of the cap, wherein when the cap is mounted on an opening of the container body, the upper surface of the opening is in close contact with the packing to seal the opening, and the packing is a packing made of injection-molded synthetic resin.

Description

Technology Field

[0001] The present invention relates to a container having a packing for a cap with increased sealing power and a method for manufacturing a container. In this invention, when a cap is mounted on an opening of a container body, the upper surface of the opening is in close contact with a packing mounted on the inner side of the cap, thereby sealing the opening. The invention relates to a container having a packing for a cap that increases such sealing power and a method for manufacturing a container according to the same. Background Technology

[0003] Recently, there has been an increasing demand for packaging containers that can maintain the functional ingredients contained in the contents stably for a long period of time.

[0004] Generally, a cap is installed at the opening of the container body to prevent the contents contained in the container body from leaking out. However, the contents may leak through a small gap formed when the inner surface of the cap and the upper surface of the opening are not in close contact. To minimize this problem, a packing is positioned on the inner side of the cap. That is, during the process of installing the cap at the opening of the container body, the upper surface of the opening is made to be in close contact with this packing, so that the sealing force of the opening is maintained through the contact force between the upper surface of the opening and the packing.

[0005] Generally, the material of such packing is a polyethylene foam sheet, which is a sheet formed by foaming polyethylene.

[0007] We examine the prior art, Korean Utility Model Registration No. 20-0421312.

[0008] The prior art relates to a cap packing for a cosmetic packaging container having an oxygen absorption function. It relates to a cap packing structure made of a polyethylene foam sheet, in addition to forming an oxygen barrier layer, an intermediate layer, and an oxygen absorption layer, thereby blocking the inflow of oxygen from the outside through the cap and allowing even the minute oxygen contained in the contents and the oxygen already contained in the packaging container to be absorbed and eliminated, making it possible to store the contents stably for a long period without deterioration.

[0009] In FIG. 1, which illustrates the prior art, a cap (2) mounted on the opening of the packaging container (1) to suppress leakage of contents contained in the packaging container (1), and a foam packing (10) made of polyethylene foam sheet material mounted on the inside of the cap (2) to increase the sealing force of the opening of the packaging container (1) are shown.

[0011] However, the polyethylene foam sheet formed as polyethylene is foamed into a foam form has fine holes through which air can penetrate. This allows the functional components of the contents to volatilize through these fine holes, and oxygen from the outside air can be absorbed into the contents through the fine holes, potentially causing the contents to deteriorate. Furthermore, there is a problem in that a gap may form between the foam sheet and the upper surface of the opening as the process of attaching and detaching the cap from the opening of the container body is repeated, causing the contents to leak.

[0012] There is an urgent need for research on technical characteristics to replace polyethylene foam sheet packing, which can minimize volume loss and maintain the properties of the contents without alteration while they are stored in the container. The problem to be solved

[0014] In order to solve the problems associated with the aforementioned conventional technology, we propose a packing for a container cap with enhanced sealing power so that leakage or deterioration of the contents can be minimized even when the contents are stored in the container for a long time. means of solving the problem

[0016] In order to solve the problems according to the prior art described above, the container according to the present invention comprises: a container body for receiving contents; a cap mounted on an opening of the container body; and a packing mounted on the inner side of the cap, wherein when the cap is mounted on an opening of the container body, the upper surface of the opening is in close contact with the packing to seal the opening, and the packing may be a packing formed by injection molding of a synthetic resin.

[0018] Preferably, the bottom surface of the packing can be formed in a shape corresponding to the top surface of the opening.

[0020] Preferably, the packing is mounted on the inner side of the cap, but is mounted in a manner that is detachable from the inner surface of the cap, and the material of the packing may be the same material as the material of the cap or the material of the container body.

[0022] In order to solve the problems according to the prior art described above, the method for manufacturing a container according to the present invention comprises: a step of forming a packing; a step of mounting the packing on the inner side of a cap; and a step of mounting the cap on an opening of a container body in which contents are received while the packing is mounted on the inner side of the cap.

[0023] When the above cap is mounted on the opening of the container body, the upper surface of the opening is in close contact with the packing to seal the opening, and the packing may be formed by injection molding of synthetic resin.

[0025] Preferably, the packing is mounted on the inner side of the cap, in a manner detachable from the inner surface of the cap, and the lower surface of the packing is formed in a shape corresponding to the upper surface of the opening, and the material of the packing may be the same material as the material of the cap or the material of the container body. Effects of the invention

[0027] Due to the above-described means for solving the problem, the sealing force between the upper surface of the opening and the packing is increased, thereby minimizing leakage of the contents. Furthermore, the inflow of oxygen and other substances from the outside is blocked, allowing the contents to be stored in the container for a long time while minimizing deterioration of the contents. Brief explanation of the drawing

[0029] FIG. 1 is a schematic drawing illustrating a container including packing according to the prior art. FIG. 2 is a flowchart of a method for manufacturing a container according to the present invention. Specific details for implementing the invention

[0030] Hereinafter, preferred embodiments according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of lines or the size of components depicted in the drawings may be exaggerated for clarity and convenience of explanation. Furthermore, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intention or convention of the user or operator. Therefore, the definitions of these terms should be based on the content throughout this specification.

[0032] A container according to the present invention may include a container body for receiving contents, a cap mounted at an opening of the container body, and a packing mounted on the inside of the cap.

[0033] When the cap is mounted on the opening of the container body, the upper surface of the opening comes into close contact with the packing, thereby increasing the sealing force of the opening.

[0034] Unlike foam packing according to the prior art, which is made of a polyethylene foam sheet material formed by foaming polyethylene, the packing according to the present invention may be a packing formed by injection molding of a synthetic resin.

[0035] That is, the packing according to the present invention may be a packing formed by injection molding a synthetic resin into a shape corresponding to the inner shape of the cap and the upper surface of the opening of the container body. Here, it goes without saying that any synthetic resin capable of injection molding can be used.

[0036] A packing formed by injection molding of synthetic resin can be mounted in a state that is detachable from the inner surface of the cap. That is, as described above, it can be configured to be mounted on or detached from the inner side of the cap at any time while being formed by injection molding in a shape corresponding to the shape of the inner side of the cap and the shape of the upper part of the opening of the container body.

[0037] In addition, the material of the packing may be the same as the material of the cap or the container body. If the cap or the container body is also formed by injection molding of synthetic resin, it goes without saying that the material of the cap or the container body may also be injection molded from a synthetic resin of the same material as the packing.

[0039] Accordingly, the method for manufacturing a container according to the present invention may include a step of forming a packing by injection molding a synthetic resin, and a step of mounting the formed packing on the inner side of a cap. Furthermore, while the packing is mounted on the inner side of the cap, the method may include a step of mounting the cap on the opening of the container body such that the upper surface of the opening is in close contact with the packing, thereby sealing the opening.

[0041] In the case of foam packing made of polyethylene foam sheet material, the foam sheet formed as polyethylene expands into a foam form contains numerous fine holes. Consequently, functional components contained in the contents may penetrate these fine holes and leak to the outside, and furthermore, there is a risk that external oxygen may penetrate these fine holes and enter the interior, thereby causing the contents to deteriorate.

[0042] On the other hand, the packing according to the present invention is formed by injection molding of a synthetic resin, so no micro-holes are formed that could allow the functional components of the contents to leak or external oxygen to enter. Accordingly, there is no risk of the functional components of the contents volatilizing or external oxygen entering, so the loss of contents during long-term storage and the risk of spoilage of the contents can be minimized.

[0044] Furthermore, in the case of the foam packing, a pre-formed polyethylene foam sheet is cut to fit the size of the inner space of the cap and mounted on the inside of the cap. As such, it may have a uniform shape regardless of the various shapes of the upper surface of the opening of the container body, as it does not correspond to the shape of the upper surface of the opening of the container body. Accordingly, even if the upper surface of the opening of the container body and the foam packing are in close contact, a fine gap may be formed due to misalignment caused by the non-corresponding shapes, and thus the possibility of leakage of contents or ingress of impurities may increase.

[0045] On the other hand, the packing according to the present invention can be injection molded in a shape corresponding to the shape of the upper surface of the opening of the container body. That is, a mold corresponding to the shape of the upper surface of the opening of the container body is manufactured, and synthetic resin is injected into such a mold to form a packing corresponding to the shape of the upper surface of the opening. Accordingly, the part where the upper surface of the opening of the container body and the packing come into close contact corresponds to each other, so that when the upper surface of the opening and the packing come into close contact, the formation of a gap can be minimized, and thus the possibility of leakage of contents or ingress of impurities can be minimized.

[0047] Furthermore, in the case of a foam packing formed by foaming, the density is relatively low compared to the volume. Once the upper surface of the opening of the container body is in close contact and any part of the foam packing is pressed, it becomes difficult to return to its original state. Consequently, even if the upper surface of the opening is in close contact and then separated and subsequently in close contact again, the initial sealing force (the sealing force generated as the foam packing is pressed) cannot be maintained.

[0048] On the other hand, since the packing according to the present invention is formed by injection molding of a synthetic resin, it may have a relatively high density relative to its volume. Therefore, even if the upper surface of the opening is in close contact, the area that is pressed can be minimized. That is, even if the upper surface of the opening is in close contact and subsequently separated, deformation of the area where the upper surface of the opening is in close contact is minimized, and even if the area where it is in close contact is pressed to a minimal level, once the upper surface of the opening is separated, the pressed area can return to its original state. Therefore, even if the upper surface of the opening is in close contact, separated, and then in close contact again, deformation of the part of the packing that is in close contact is minimized, so the initial sealing force can be maintained.

[0050] Furthermore, in the case of foam packing made of polyethylene foam sheet material, significant deformation occurs depending on the temperature or use, and due to the deformation, fine gaps that were not initially formed are formed.

[0051] On the other hand, the packing according to the present invention is formed by injection molding of a synthetic resin, so that almost no deformation occurs at temperatures within the range in which the container is used, and as described above, deformation due to use is also minimized, so the formation of a gap between the packing and the upper surface of the opening can be minimized depending on the temperature or use.

[0053] Furthermore, in the case of foam packing made of polyethylene foam sheets, since it is made of a material different from that of the cap or the container body, the foam packing must be removed from the cap or the container after use for the container to be recycled. Consequently, additional processes are required for recycling, which lowers recyclability.

[0054] On the other hand, the material of the packing according to the present invention may be the same as the material of the injection-molded cap or the container body, so that when the cap or container body is recycled, the process of separately removing the packing becomes unnecessary, and the reusability of the cap, container body, or packing can be increased.

[0056] Furthermore, when a foam packing made of polyethylene foam sheet material is installed on the inside of a cap, adhesives or double-sided adhesive tape are used to prevent the foam packing from separating from the inside of the cap. Consequently, the foam packing must be removed when recycling the cap; however, due to problems caused by these adhesives or double-sided adhesive tapes, the recycling rate is significantly reduced.

[0057] On the other hand, the packing according to the present invention can be injection molded in a shape corresponding to the shape of the upper surface of the opening, and furthermore, can be injection molded with a mold having a diameter matching the diameter of the inner side of the cap so that it is mounted on the inner side of the cap in a manner similar to an interference fit and does not separate from the inner side of the cap unless a certain external force is applied, thereby avoiding the problems associated with adhesives or double-sided adhesive tapes according to the prior art.

[0059] Furthermore, in the case of foam packing, there is a problem in that material diversity cannot be pursued because the materials are very limited, such as polyethylene.

[0060] On the other hand, the packing according to the present invention can be formed using any synthetic resin capable of injection molding, and furthermore, since it is a packing that can be injection molded using a synthetic resin of the same material as the material of the cap or the material of the container body, material diversity can be pursued and recyclability can be increased as described above.

[0062] Furthermore, in order to prevent leakage of contents or ingress of external components, a coating is applied to the foam packing. However, despite this coating, the coating deteriorates depending on the temperature, and once the foam packing is pressed, the coating also remains in a pressed state. Since the upper surface of the opening of the container body is in close contact with the pressed state, a gap may occur in the pressed area.

[0063] On the other hand, since the packing according to the present invention does not create fine holes like foam packing, a separate coating process is unnecessary, and thus efficiency in terms of cost can be increased.

[0065] For the time being, the present specification has been described with reference to embodiments illustrated in the drawings so that those skilled in the art can easily understand and reproduce the present invention; however, this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible from the embodiments of the present invention. Accordingly, the scope of protection of the present invention should be determined by the claims.

Claims

Claim 1 A container body for holding contents; a cap mounted at an opening of the container body; The invention includes a packing mounted on the inner side of the cap, wherein when the cap is mounted on the opening of the container body, the upper surface of the opening is in close contact with the packing to seal the opening, the packing is formed by injection molding of a synthetic resin, and when the cap is mounted on the opening, the leakage of functional components of the contents to the outside of the container body and the inflow of external oxygen into the inside of the container body are blocked by the packing, which is in a state where no micro-holes are formed due to injection molding, and the portion of the lower surface of the packing that is in close contact with the upper surface of the opening is in close contact with the upper surface of the opening, and is in close contact without misalignment so that no gap is formed in the close contact state, and the packing is formed by injecting a synthetic resin into a mold manufactured in a shape corresponding to the inner side of the cap and the shape of the upper surface of the opening, such that the upper surface of the opening and the portion of the packing that is in close contact with the upper surface of the opening correspond to each other. The packing is formed such that when the portion of the lower surface of the packing that is in contact with the upper surface of the opening is in contact with the upper surface of the opening, the portion of the lower surface of the packing that is in contact with the upper surface of the opening is in contact with the upper surface of the opening without being misaligned with each other, and the upper surface of the opening is in contact with the portion of the lower surface of the packing that is in contact with the upper surface of the opening, and the portion of the lower surface of the packing that is in contact with the upper surface of the opening is pressed, and subsequently, as the upper surface of the opening is separated from the portion of the lower surface of the packing that is in contact with the upper surface of the opening, the portion of the lower surface of the packing that is pressed and in contact with the upper surface of the opening is restored to its original state, and the upper surface of the opening is in contact with the portion of the lower surface of the packing that is in contact with the upper surface of the opening, and subsequently, the upper surface of the opening is separated from the portion of the lower surface of the packing that is in contact with the upper surface of the opening.Subsequently, while the upper surface of the opening is in contact with the part of the lower surface of the packing that is in contact with the upper surface of the opening, the sealing force of the state in which the upper surface of the opening was initially in contact with the part of the lower surface of the packing that is in contact with the upper surface of the opening is maintained; the material of the packing is the same as the material of the container body; no deformation of the packing occurs within the temperature range in which the container body is used; the packing is recycled together with the container body while the packing is not separated from the container body; the packing is installed by a press fit on the inner side of the cap, such that it is not separated from the inner side of the cap unless a certain external force is applied to the packing; and the density per unit volume of the packing is higher than the density per unit volume of a foam packing made of a polyethylene foam sheet material formed by foaming in a foam form. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete

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