KR102203464B1 - Container having inmold label for easy recycle and recycling method for the same - Google Patents

Abstract

The present invention relates to a technology for facilitating recycling of containers with in-mold labels. According to an aspect of the present invention, a container with in-mold label, which is easy to recycle, comprises: a storage container including an elastic material; and the in-mold label attached to an outer surface of the storage container and including a detachable part. Accordingly, when pressure is applied to the storage container from the outside to the inside, the detachable part of the in-mold label is peeled off from the storage container.

Description

Recyclable storage container with an in-mold label attached, and a recycling method for the storage container {CONTAINER HAVING INMOLD LABEL FOR EASY RECYCLE AND RECYCLING METHOD FOR THE SAME}

The present invention relates to a storage container attached with an in-mold label and a recycling method thereof. The present invention, more particularly, to a storage container with an in-mold label designed to facilitate recycling even though an in-mold label is attached and a recycling method thereof.

Recycling of used waste containers has long been a major issue in food and beverage storage containers such as beverages and food, which are mainly made of plastic including PET.

Labels including various contents including product names are attached and used on the outer surface of beverage containers or food containers. Labels attached in this way are similar in material to the container itself and are attached using a strong adhesive force so that it does not fall off, so it is difficult to detach and remove, thus increasing the recycling cost of the container and causing environmental pollution. There are various types of labels attached in various ways, but one of the labels that have been used in many recent years is the in-mold label.

In recent years, the use of plastic containers has been banned by policy, and attention is also being focused on ways to recycle used waste plastic containers. Thus, labels attached to the outer surfaces of various recyclable storage containers including plastics are effectively removed. It was a situation in which a skill that could be done was needed.

In particular, in the case of in-mold labels that have been used in large quantities recently, although separation has become easier than paper labels used in the past, in reality, a separate process for separation from waste containers is required for recycling, which increases recycling costs. There was a problem.

The present invention derives an easy-to-separate idea for an in-mold label and a beverage storage container to which an in-mold label is attached based on many years of experience in manufacturing in-mold labels, and is embodied.

An object of the present invention is to provide an in-mold label that can be easily detached from a container to reduce recycling costs, and to propose an easy-to-recyclable storage container to which the in-mold label is attached.

The ultimate object of the present invention is to reduce the recycling cost by reducing the recycling cost of the storage container by replacing a separate process introduced for label separation with an easy manual operation during the recycling process of the storage container including the in-mold label. It is to improve the quality and contribute to environmental protection.

An object of the present invention is to implement the effects that can be achieved with the technical content proposed in the specification, and the object of the present invention is not necessarily limited to the above description.

An easy-to-recyclable storage container with an in-mold label attached according to an aspect of the present invention includes: a storage container including an elastic material; And an in-mold label attached to the outer surface of the storage container and including a detachable portion. Including, and when pressure is applied to the storage container from the outside to the inside, the detachable part of the in-mold label is peeled from the storage container.

According to an embodiment of the present invention, at least a portion of the region of the in-mold label that does not include the detachable portion may be adhered to the outer surface of the storage container by heat.

According to an embodiment of the present invention, the in-mold label is from a side near the container, a polypropylene (PP) resin, a polyester resin, an acrylic resin, and an ethylene vinyl acetate copolymer ( EVA) an adhesive layer formed to include at least one selected from the group consisting of and an adhesive component; A barrier layer comprising at least one selected from the group consisting of ethylene vinyl alcohol (EVOH), polyvinylidene chloride (PVDC), polyvinyl alcohol (PVA), polyurethane (PU), and nano resins; Printing layer; And a film layer comprising at least one selected from the group consisting of stretched polypropylene (OPP), polyethylene terephthalate (PET), polystyrene (PS), polyethylene (PE), and acrylic resin; may be included. .

According to an embodiment of the present invention, the detachable part may not include the adhesive layer.

According to an embodiment of the present invention, the detachable part may be a micro-perforation treatment of at least a portion of the in-mold label with a size of 0.01 mm to 0.5 mm.

According to an embodiment of the present invention, the storage container is selected from the group consisting of polyethylene terephthalate (PET) resin, polypropylene (PP) resin, polyethylene (PE) resin, polystyrene (PS) resin, and acrylic resin. It may be to include one or more.

According to an embodiment of the present invention, the storage container may be capable of changing at least some of its shape by an external force.

According to an embodiment of the present invention, the detachable part may be formed on at least one edge or corner of the in-mold label.

According to an exemplary embodiment of the present invention, the detachable part may form a weaker adhesive force with the outer surface of the storage container compared to a region of the in-mold label excluding the detachable part.

According to an embodiment of the present invention, the external force may be 10 kgf or more.

According to an embodiment of the present invention, the detachable part may be covered by a sealing part and not exposed to the outside, and the sealing part may prevent peeling of the detachable part.

According to an embodiment of the present invention, the sealing portion may be separated from the detachable portion when an external force is applied in a direction parallel to the outer surface of the container.

According to another aspect of the present invention, a method for recycling a storage container including an in-mold label includes the steps of applying an external force to a storage container to which the in-mold label is attached to peel off the detachable portion from the outer surface of the storage container; Holding the detachable portion peeled from the outer surface of the storage container and removing the in-mold label from the storage container; And recycling the storage container.

According to an embodiment of the present invention, the in-mold label may further include a sealing part formed to cover the detachable part, and before peeling the detachable part, pushing the sealing part back and forth to remove the detachable part. .

According to an embodiment of the present invention, an in-mold label can be easily separated from the outer surface of the storage container after applying a slight external force to the container at a level that can be realized with a sufficient grip force for adults.

In the case of the in-mold label proposed in the present invention, when attached to the outer surface of a plastic-based container, the detachable part can be maintained in close contact with the container without the use of a special adhesive due to effects such as static electricity of the base layer of the label.

In addition, according to an embodiment of the present invention, the in-mold label can be easily separated from the container even through a process called water through fine drilling.

In addition, according to an embodiment of the present invention, it is possible to prevent separation of the detachable part in the process of using the container with the label attached by using the sealing part. The sealing part can also be separated by applying a slight external force during the recycling process.

In the case of using the container with the in-mold label attached to the container provided in the present invention as described above, it retains the same type of attachment as the container with the conventional in-mold label in the process of use, and then adheres to the outer surface of the container in the process of recycling the waste container. It has the effect of easily separating and removing the in-mold label and recycling only the container.

1 is a schematic diagram showing an easy-to-recyclable storage container with an in-mold label proposed by the present invention according to an embodiment of the present invention.
2(a) to 2(c) schematically illustrate a method of easily removing an in-mold label from a storage container with an in-mold label attached to an in-mold label proposed in the present invention according to an embodiment of the present invention. It is a process chart shown as.
3(a) and 3(b) show that in a storage container that is easy to recycle with an in-mold label provided with a sealing part according to an embodiment of the present invention, the sealing part is first removed, and then the in-molding part is used. It is a process chart showing a method of removing the de-label.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings. Unless otherwise stated, the same reference numerals in each drawing indicate the same member.

Various changes may be made to the embodiments described below. The embodiments described below are not intended to limit the scope of the invention to the described embodiments, and the scope to be claimed as a right through the present application should be understood to include all changes, equivalents, and substitutes for them.

The terms used in the examples are used only to describe specific embodiments, and are not intended to limit the embodiments. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present specification, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that it does not exclude the possibility of the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiment belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

In addition, in the description with reference to the accompanying drawings, the same reference numerals are assigned to the same components regardless of the reference numerals, and redundant descriptions thereof will be omitted. In describing the embodiments, when it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the embodiments, the detailed description thereof will be omitted.

1 is a schematic diagram showing an easy-to-recyclable storage container with an in-mold label proposed in the present invention according to an embodiment of the present invention.

2(a) to 2(c) schematically illustrate a method of easily removing an in-mold label from a storage container with an in-mold label attached to an in-mold label proposed in the present invention according to an embodiment of the present invention. It is a process chart shown as.

Below with reference to FIGS. 1 and 2 (a) to 2 (c) will be described in detail the structure of the recyclable storage container and the in-mold label attached thereto proposed in the present invention with an in-mold label. .

An easy-to-recyclable storage container with an in-mold label attached according to an aspect of the present invention includes: a storage container including an elastic material; And an in-mold label attached to the outer surface of the storage container and including a detachable portion. Including, and when pressure is applied to the storage container from the outside to the inside, the detachable part of the in-mold label is peeled from the storage container.

The present invention proposes a container to which an in-mold label is attached, and develops and embodies a technique for easily removing an in-mold label from a storage container using a detachable part.

According to the inventor's long-time production know-how, when manufacturing an in-mold label with an appropriate material and a container to which the label is attached, the in-mold label is well attached to the outer surface of the container even if no special adhesive is added only to the corners. It was confirmed that it was maintained. This may be an electrostatic effect between appropriately selected materials, or may be an adhesion force between different materials generated at the corners of the in-mold label in the process of attaching the in-mold label to the outer surface of the container in a rolled form.

The present inventors have confirmed that a sufficient degree of adhesion can be realized at the corners or edges between some container materials and some in-mold label materials, even without such an adhesive, and developed and proposed the present invention.

According to the present invention, an embodiment is proposed in which an in-mold label provided with a detachable portion is provided at least in part and attached to a container made of a recyclable material. In this case, the outer surface of the container may include a curved surface. According to an example, when the outer surface of the container forms a curved surface, the detachable portion can be maintained in a form attached to the outer surface of the container without a special adhesive material due to the curling effect of the in-mold label attached to the outer surface, electrostatic attraction between materials, etc. have.

According to an embodiment of the present invention, at least a portion of the region of the in-mold label that does not include the detachable portion may be adhered to the outer surface of the storage container by heat.

According to an example, at least a portion of the in-mold label other than the detachable portion may be formed to form thermal adhesion with the container. However, it is not necessary to form only heat bonding between the outer surface of the container and the area outside the detachable portion, and adhesion using a kind of adhesive component may be formed.

According to an embodiment of the present invention, the in-mold label is from a side near the container, a polypropylene (PP) resin, a polyester resin, an acrylic resin, and an ethylene vinyl acetate copolymer ( EVA) an adhesive layer formed to include at least one selected from the group consisting of and an adhesive component; A barrier layer comprising at least one selected from the group consisting of ethylene vinyl alcohol (EVOH), polyvinylidene chloride (PVDC), polyvinyl alcohol (PVA), polyurethane (PU), and nano resins; Printing layer; And a film layer comprising at least one selected from the group consisting of stretched polypropylene (OPP), polyethylene terephthalate (PET), polystyrene (PS), polyethylene (PE), and acrylic resin; may be included. .

According to an example, the in-mold label proposed by the present invention may include an adhesive layer that is directly in contact with the outer surface of a container, a blocking layer that is sequentially laminated on the adhesive layer, a printing layer, and a film layer.

The adhesive layer performs a function of forming adhesion with the outer surface of the container. The adhesive layer is a sealant layer that can be adhered to the outer surface of the container, and may be a layer formed using an adhesive coating or film.

The blocking layer is to add barrier properties, and may preferably be formed to a thickness of 1 μm to 5 μm. The barrier layer may be a layer introduced to compensate for low gas barrier properties that are problematic when a single film such as an OPP film or a PET film is used.

The printing layer is a layer introduced to add various information or advertisement effects to the label, and the method of forming the printing layer in the present invention is not particularly limited. However, as an example, a method such as gravure printing, UV printing, and flexo printing may be used.

The film layer may preferably be formed to a thickness of 30 μm to 100 μm. The film layer serves to protect the print layer from the outside, and may also play a role to show the aesthetic appearance by being laminated on the print layer. According to an example, the film layer may be formed of a MATT material to include a matte material.

According to an embodiment of the present invention, the detachable part may not include the adhesive layer.

As described above, according to an example, even when the detachable portion is formed without including an adhesive layer, it is in close contact with the container and maintains a shape that is not separated from the container until a special external force is applied.

According to an example of the present invention, the in-mold label may further include a pretreatment coating layer. The pretreatment coating layer may be formed between the printing layer and the outer surface of the container. The pretreatment coating layer is a layer introduced to facilitate separation between the in-mold label and the container, and may be preferably formed to a thickness of 0.1 μm to 3 μm. The pretreatment coating layer may be formed using a water-soluble acrylic-based or PVA-based resin. As an example, the pretreatment coating layer may be formed in a region including a detachable portion.

According to an embodiment of the present invention, at least some layers of the in-mold label may be micro-perforated having a size of 0.01 mm to 0.5 mm.

At least some layers of the micro-perforated in-mold label may be formed in a region including a detachable portion. In the present invention, the method of performing the micro-perforation treatment is not particularly limited, and some of the plurality of layers included in the label may be micro-perforated to perform a role of helping separation from the container. The micro-perforated layer may include one or more layers of the film layer, the printing layer, the pretreatment coating layer, and the blocking layer.

The size of the fine perforation may be 0.01 mm to 0.5 mm, and if it is less than 0.01 mm, the production cost increases during the manufacturing process, and if it exceeds 0.5 mm, the adhesion between the layers decreases, so that some layers of the film are formed during the use of the container. Peeling problems may occur.

At least some layers of the perforated in-mold label through the perforation treatment (porosity treatment) can easily react to moisture, and in the process of recycling waste containers, a steam shower or a method of dipping the outer surface in water is used. There is an effect that the perforated layer can be easily separated from the container.

According to an embodiment of the present invention, the storage container is selected from the group consisting of polyethylene terephthalate (PET) resin, polypropylene (PP) resin, polyethylene (PE) resin, polystyrene (PS) resin, and acrylic resin. It may be to include one or more.

In addition to the resin materials described above, the storage container may further include a material that is easy to process while maintaining elasticity.

According to an embodiment of the present invention, the storage container may be capable of changing at least some of its shape by an external force.

According to an embodiment of the present invention, the detachable part may be formed on at least one edge or corner of the in-mold label.

According to an exemplary embodiment of the present invention, the detachable part may form a weaker adhesive force with the outer surface of the storage container compared to a region of the in-mold label excluding the detachable part.

According to an embodiment of the present invention, the external force may be 10 kgf or more. The external force may be preferably 30 kgf or more.

In the present invention, in consideration of the average grip strength of an adult, it is characterized in that it is a container capable of distorting the container by applying external pressure to the container with only the strength of the grip force that can be applied to the average adult. In this case, the external force may be a pressure applied in a vertical direction to the outer surface of the container.

3(a) and 3(b) show that in a storage container that is easy to recycle with an in-mold label provided with a sealing part according to an embodiment of the present invention, the sealing part is first removed, and then the in-molding part is used. It is a process chart showing a method of removing the de-label.

3(a) and 3(b), a sealing part which may be provided as an example of the present invention is shown. Hereinafter, with reference to FIGS. 3 (a) and 3 (b), a configuration of a sealing part that can be introduced in some embodiments of the present invention, its advantages, and a method of use will be described in detail.

According to an embodiment of the present invention, the detachable part may be covered by a sealing part and not exposed to the outside, and the sealing part may prevent peeling of the detachable part.

According to an example, a sealing part may be introduced to prevent the detachable part from being easily peeled off the outer surface of the container. This is to prevent the detachable part from being detached from the outer surface of the container before it becomes a waste container in consideration of the external force applied during the process of lifting or transporting the container during the use process of the container. As described above, the detachable part may be well attached to the outer surface of the container without a special adhesive component. However, it may be implemented such that the adhesive strength is relatively weak compared to other parts of the in-mold label rather than the detachable part. In this case, there is a concern that the detachable part may be easily peeled off while the beverage is contained in the container depending on the storage and use of the product. In the present invention, in consideration of these concerns, an additional seal may be introduced.

According to an example, the sealing portion may be formed in an area larger than the area of the detachable portion. According to an example, the sealing portion may be in direct contact with the outer surface of the container while covering at least a portion of the detachable portion.

According to an example, the sealing part may be attached to the outer surface of the container and then torn when a certain portion is pulled, so that the detachable part and at least a part are separated from each other. In that case, the user can hold the detachable part and the part of the separated sealing part and easily separate the sealing part from the detachable part completely.

According to an embodiment of the present invention, the sealing portion may be separated from the detachable portion when an external force is applied in a direction parallel to the outer surface of the container.

As an example, the sealing part may be provided in a form that is easily removed from the upper surface of the detachable part by an external force applied in a direction parallel to the outer surface of the container. The external force applied at this time may mean the magnitude and direction of a force such that a user pushes the sealing part by hand along the outer surface of the container.

Through this method, the user easily removes the sealing part by applying an external force in a direction parallel to the outer surface of the waste container, separates the detachable part by applying an external force in a direction perpendicular to the outer surface of the container, and then holds the detachable part by hand and holds the in-mold label. It can be easily removed from the container.

According to another aspect of the present invention, a method for recycling a storage container including an in-mold label includes the steps of applying an external force to a storage container to which the in-mold label is attached to peel off the detachable portion from the outer surface of the storage container; Holding the detachable portion peeled from the outer surface of the storage container and removing the in-mold label from the storage container; And recycling the storage container.

According to an embodiment of the present invention, the in-mold label may further include a sealing part formed to cover the detachable part, and before peeling the detachable part, pushing the sealing part back and forth to remove the detachable part. .

As described above, specific parts of the present invention have been described in detail, and it will be apparent to those of ordinary skill in the art that these specific techniques are only preferred embodiments, and the scope of the present invention is not limited thereby. will be. Therefore, it will be said that the substantial scope of the present invention is defined by the appended claims and their equivalents.

As described above, although the embodiments have been described by the limited embodiments and drawings, various modifications and variations are possible from the above description by those of ordinary skill in the art. For example, even if the described techniques are performed in a different order from the described method, and/or the described components are combined or combined in a form different from the described method, or are replaced or substituted by other components or equivalents. Appropriate results can be achieved.

Therefore, other implementations, other embodiments, and claims and equivalents fall within the scope of the claims to be described later.

100, 100': courage
200: in-mold label
210: detachable part
220: sealing part

Claims (14)

A storage container comprising an elastic material; And
An in-mold label attached to the outer surface of the storage container and including a detachable portion; Including,
When pressure is applied to the storage container from the outside to the inside, the detachable part of the in-mold label is peeled from the storage container,
The in-mold label is selected from the group consisting of polypropylene (PP) resin, polyester resin, acrylic resin, and ethylene vinyl acetate copolymer (EVA) from the side near the storage container. An adhesive layer formed to include one or more and an adhesive component; A barrier layer comprising at least one selected from the group consisting of ethylene vinyl alcohol (EVOH), polyvinylidene chloride (PVDC), polyvinyl alcohol (PVA), polyurethane (PU), and nano resins; Printing layer; And a film layer comprising at least one selected from the group consisting of stretched polypropylene (OPP), polyethylene terephthalate (PET), polystyrene (PS), polyethylene (PE), and acrylic resin,
The detachable part does not include the adhesive layer,
The detachable portion is at least a partial layer of the in-mold label is micro-perforated with a size of 0.01 mm to 0.5 mm,
The detachable part is covered by the sealing part and is not exposed to the outside, the sealing part prevents peeling of the detachable part,
The sealing part is separated from the detachable part when an external force is applied in a direction parallel to the outer surface of the container,
Recyclable storage container with in-mold label attached.
The method of claim 1,
At least a portion of the region of the in-mold label that does not include the detachable portion is adhered to the outer surface of the storage container by heat,
Recyclable storage container with in-mold label attached.
delete delete delete The method of claim 1,
The storage container includes at least one selected from the group consisting of polyethylene terephthalate (PET) resin, polypropylene (PP) resin, polyethylene (PE) resin, polystyrene (PS) resin, and acrylic resin,
Recyclable storage container with in-mold label attached.
The method of claim 1,
The storage container is capable of changing at least some of its shape by an external force,
Recyclable storage container with in-mold label attached.
The method of claim 1,
The detachable part is formed on at least one edge or corner of the in-mold label,
Recyclable storage container with in-mold label attached.
The method of claim 1,
The detachable portion forms a weaker adhesive force with the outer surface of the storage container compared to an area excluding the detachable portion of the in-mold label,
Recyclable storage container with in-mold label attached.
The method of claim 7,
The external force is 10 kgf or more,
Recyclable storage container with in-mold label attached.
delete delete Peeling the detachable portion from the outer surface of the storage container by applying an external force to the storage container to which the in-mold label is attached;
Holding the detachable part peeled off from the outer surface of the storage container and removing the in-mold label from the storage container; And
Recycling the storage container; Including,
The in-mold label is selected from the group consisting of polypropylene (PP) resin, polyester resin, acrylic resin, and ethylene vinyl acetate copolymer (EVA) from the side near the storage container. An adhesive layer formed to include one or more and an adhesive component; A barrier layer comprising at least one selected from the group consisting of ethylene vinyl alcohol (EVOH), polyvinylidene chloride (PVDC), polyvinyl alcohol (PVA), polyurethane (PU), and nano resins; Printing layer; And a film layer comprising at least one selected from the group consisting of stretched polypropylene (OPP), polyethylene terephthalate (PET), polystyrene (PS), polyethylene (PE), and acrylic resin,
The detachable part does not include the adhesive layer,
The detachable portion is at least a portion of the layer of the in-mold label is micro-perforated with a size of 0.01 mm to 0.5 mm,
The in-mold label includes a sealing part formed to cover the detachable part, and before the step of peeling the detachable part, removing the sealing part by pushing it back and forth;
A method of recycling storage containers including in-mold labels. delete

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