KR20060008203A - Manufacturing method of packaging film for label, packaging film for label manufactured by the manufacturing method and using method of packaging film - Google Patents

Abstract

The present invention relates to a packaging film, and more specifically, it can be used as a label to wrap a packaging container to extend the shelf life of the packaged contents and is excellent in advertising effect by the gloss treatment as well as the deformation of the fabric at 20-40 ℃ The present invention relates to a method for manufacturing a packaging film for labels without curling, a packaging film for labels manufactured by the manufacturing method, and a method for using the packaging film.

Since the packaging film for labels according to the present invention not only includes 7-18 μm thick aluminum fabric, but also includes a top film for protecting the printing surface after printing the label so as to be glossy. Wrapping the packaging container with the label packaging film according to the present invention significantly lowers the moisture permeability of the packaging container and blocks light including ultraviolet rays, which improves the preservation of the packaged contents and protects the printed surface of the gloss. Excellent, there is an excellent effect that can solve the deformation and curling problems of the fabric, which was a conventional problem of the packaging film for labels.

Description

Method for producing packaging film for label, packaging film for label manufactured by the manufacturing method and using method of packaging film {Method for producing package film for label, the package film for label thereby, and the using method

1 is a cross-sectional view of a packaging film according to an embodiment of the present invention.

Figure 2 is a state of use of the packaging film prepared according to FIG.

<Explanation of symbols for the main parts of the drawings>

100: packaging film 110: lower fabric

120: aluminum fabric 130: core fabric

140: printed layer 150: adhesive layer

160: upper fabric 200: container

The present invention relates to a packaging film, and more specifically, it can be used as a label to wrap a packaging container to extend the shelf life of the packaged contents and is excellent in advertising effect by the gloss treatment as well as the deformation of the fabric at 20-40 ℃ The present invention relates to a method for manufacturing a packaging film for labels without curling, a packaging film for labels manufactured by the manufacturing method, and a method for using the packaging film.

Containers for packaging goods, including beverage containers, may also be manufactured in a shape with a specific design to indicate the product's features, manufacturer, and trademarks, but typically a specific design is used to indicate the product's features, manufacturer, and trademarks. Printed labels are used to attach part of the packaging or to wrap the entire packaging.

As such, when the product is completed in a packaging container with a label attached thereto, the end user uses the product through a process such as transportation and storage. In this case, the packaging container has a problem with an advertising effect such as design or color. Internally, it should block external visible light so that there is no abnormality in long-term storage of the product, and moisture or inferiority should be blocked from the outside.

By the way, the present food packaging container, especially the beverage container is mainly used polyethylene molding container, polyethylene has the smallest water permeability among the various resins (water permeability per 30㎛ is, for example, 19g / ㎡ for low density polyethylene About 24 hrs, in the case of high density polyethylene, for example, about 5 g / m 2 .24 hrs.), There is a problem in that there is no light blocking effect. In addition, the label surrounding the polyethylene molded container is mainly a combination of a polypropylene film orientated with paper, or simply a polypropylene film, there is no light blocking effect even if the label is attached, so that the ultraviolet ray is not easily transported or stored for a long time. Due to penetration, moisture or heat penetration, the physical properties of the product inside the packaging container may change or deteriorate on the way, thereby exposing the problem of poor preservation.

In addition, in a conventional label manufacturing process, a protective film composed of a release paper, an adhesive layer, and a transparent film is further attached on the printing surface to protect the printing surface of the label, wherein the protective film is commercially available in the industry, but due to release paper There is a problem that the cost is increased.

In addition, the conventional method of attaching the label to the container is known only the sticky method using an adhesive, the user has no choice of other methods, and because the material of the label is different from the container, it is difficult to recycle the container and the production cost There was a lot of concern that the lift and label would be separated from the container.

In addition, there is a problem in that the curling phenomenon that the cross section of the packaging film is dried over time and the deformation of the fabric for manufacturing the packaging label.

Therefore, there have been many demands in the art for a packaging film that can solve the above disadvantages.

The present invention has been made to solve the above problems, the present invention provides a method for producing a label packaging film that does not cause deformation of the fabric at 20-40 ℃ and a label packaging film prepared by the manufacturing method. Its purpose is to.

In addition, the present invention by developing an adhesive composition that can protect the printing surface is composed of a release paper, an adhesive layer and a transparent film without using a protective film commercially available adhesive of the new composition on the printing surface of the label in the manufacturing process of the label It is an object of the present invention to provide a method for manufacturing a label packaging film that can reduce manufacturing costs by applying a transparent film after applying a layer, and a label packaging film manufactured by the method.

In addition, an object of the present invention is to provide a method for manufacturing a label packaging film that can improve the storage properties of the packaged contents because it blocks light including ultraviolet rays, and a label packaging film manufactured by the method.

In addition, an object of the present invention is to provide a method for producing a label packaging film excellent in workability by solving the curling problem so that the cross-section of the packaging film does not dry over time and a label packaging film manufactured by the manufacturing method.

In addition, the present invention can be attached to the packaging film by selecting the in-mold method and the sticky method according to the user's convenience, in particular, in the case of the in-mold method by using the packaging film by attaching the container and the packaging film in the in-mold method The purpose of the present invention is to provide a method of using a label packaging film that can simplify the method, thereby reducing the manufacturing cost of the container packaged with the packaging film, and to facilitate recycling of the packaged container.

In order to achieve the above object, the present invention comprises the steps of laminating the lower fabric and the aluminum fabric; Laminating the laminated aluminum fabric and the core fabric; Printing on the laminated core fabric; Forming an adhesive layer on the printed surface of the core fabric; Attaching an upper fabric to the adhesive layer; And it provides a method for producing a label packaging film comprising the step of irradiating the UV light on the upper fabric surface.

UV light is irradiated on the surface of the upper fabric has a wavelength of 200-450 nm, characterized in that irradiated with an intensity of 100-150W per 1cm 2 of the upper fabric.

The adhesive layer is 30-35% by weight of urethane acrylate, 15-20% by weight of epoxy acrylate, 18-22% by weight of tripropylene glycol acrylate, 16-20% by weight of 2-HEMA (2-hydroxy-ethyl methacrylate), It is characterized in that it is formed of an adhesive composition comprising 5-10% by weight of the photoinitiator, 1-2% by weight of the adhesive sensitizer.

The lower fabric is polypropylene synthetic resin or polyethylene synthetic resin, characterized in that the thickness of 20-40㎛.

The core fabric is a paper or synthetic resin, characterized in that the thickness of 30-60㎛.

The upper fabric is a polyethylene terephthalate resin, a polyethylene resin or OPP having a transparent characteristic, characterized in that the thickness of 12-20㎛.

It characterized in that it further comprises the step of printing on the surface of the upper fabric.

The present invention also provides a packaging film for labels produced by any one of the above-described method.

The label packaging film is characterized in that the deformation or curling phenomenon does not occur at 20-40 ℃.

The present invention also provides a method for using a label packaging film, characterized in that any one of the above-described label packaging film is used in an in-mold manner to be attached at the same time to eject the desired container.

Hereinafter, the present invention will be described in more detail.

First, the lower fabric used in the present invention is preferably made of the same or similar material as the packaging container to which the label packaging film according to the present invention is attached, and it is easy to attach and use the label packaging film to a desired container in a relatively simple process. This is to facilitate the separation of the packaging container and the label when recycling the packaging container.

Therefore, it is preferable to use a fabric made of polypropylene-based synthetic resin or polyethylene-based synthetic resin, which is commonly used as a material for packaging containers. In the present invention, the polypropylene film used as the lower fabric is polypropylene polymerized with propylene as a catalyst. A polypropylene film of known configuration prepared by stretching can be used, more preferably a biaxially stretched polypropylene film. Meanwhile, in the present invention, a polypropylene film may be simply used, but it is more preferable to use a polypropylene film processed to have a surface made of random polypropylene having a low thermal bonding temperature.

In addition, although the polyethylene film used in the present invention may use all conventional polyethylene films commonly used in the market, it is preferable to use a high density polyethylene film to prevent moisture in the air from penetrating into the wrapping paper.

At this time, the lower fabric is preferably 20-40㎛ the thickness, if the thickness is less than 20㎛ less than the strength or thickness required for the label packaging film in the laminating process or attaching the container and the label In the process of foaming or wrinkles, there is a concern that if the size is over 40㎛, the process of attaching the container and the label may not be able to pull the fabric due to the weight of the packaging film, which may not be possible, and the economical efficiency may also be deteriorated. Because of this.

On the other hand, if you want to use the packaging film according to the present invention in the sticky manner, the lower fabric may be formed so that the release paper adhesion layer is further prepared by forming an adhesive layer of a composition known in the art on the bottom and attaching a release paper. .

In addition, the aluminum fabric used in the present invention preferably has a thickness of 7-18 μm as an aluminum foil produced by a known method, and the light blocking effect is weakened when the thickness of the aluminum fabric has a thickness of 7 microns or less. This is because excellent characteristics as a packaging film are weakened, and a thickness of 18 micrometers or more weakens economic efficiency and workability.

In addition, the core fabric used in the present invention is a support for maintaining a constant thickness and strength of the label packaging film, the material is a feeder or synthetic resin, the thickness is preferably 30-60㎛, the thickness of the core fabric If the thickness is less than 30㎛, it becomes weaker than the strength or thickness required for the label packaging film, and may cause bubbles or wrinkles in the lamination process or the process of attaching the container and the label, and the thickness of the core fabric is 60㎛. This is because, in the process of attaching the container and the label, the weight of the packaging film may not allow the fabric to be pulled out, and thus, the work may not be possible.

The feedstock used as the core fabric of the present invention can be used without particular limitation as long as it has the strength and smooth surface of the synthetic resin film, but more preferably, it is a feedstock having a basis weight of 50-100 g / m2, and then super calender treatment after one-side coating. If it has a high gloss, it has a non-fluorescence property. An example of a paper having such characteristics is high-gloss paper (based on paper production) sold on the market.

In addition, when the synthetic resin is used as the core fabric can be used without particular limitation, in particular, it is preferable to use a polyethylene-based, polypropylene-based film.

On the other hand, since the core fabric of the present invention prints a label of a desired design on its surface, it is more preferable to use a material having a surface on which a printing surface can be formed more particularly.

The upper fabric of the present invention is a synthetic resin film that is excellent in transparency and easy to form a printed layer on the surface because it is to improve the advertising effect by protecting the printed surface is glossy or can be formed on the surface thereof. It is preferable that the thickness is 12-20 μm, because when the thickness of the upper fabric is 12 μm or less, there is a problem in inferior workability, and when the thickness of 20 μm or more is inferior in economy. Here, the upper fabric is preferably used a film made of any one of polyethylene terephthalate resin, polyethylene resin or OPP.

As described above, the thicknesses of the lower fabric, the aluminum fabric, the core fabric, and the upper fabric of the packaging film of the present invention should be used within a predetermined range as described above. In the process or in the process of attaching the finished packaging film to the container, bubbles or wrinkles may occur and the quality of the product may be deteriorated. If it exceeds the range, the packaging film in the automated process of attaching the finished packaging film to the container Because of the weight of the fabric can not pull the fabric can not work because there is a fear of workability.

Meanwhile, the method for manufacturing a packaging film for labeling according to the present invention first laminates the prepared lower fabric and aluminum fabric. Next, the laminated aluminum fabric and the prepared core fabric are laminated, wherein the step of laminating the lower fabric and the aluminum fabric and the step of laminating the core fabric may be performed simultaneously or sequentially.

Next, after printing a label of a desired design on the surface of the laminated core fabric, an adhesive composition of a predetermined composition is applied to the printed surface of the laminated core fabric to form an adhesive layer, wherein the adhesive composition is a urethane acrylate 30-. 35% by weight, 15-20% by weight epoxy acrylate, 18-22% by weight tripropylene glycol acrylate, 16-20% by weight 2-HEMA (2-hydroxy-ethyl methacrylate), 5-10% by weight photoinitiator, adhesive A new composition containing 1-2 wt% of a sensitizer and designed to attach a transparent film directly in a label manufacturing process instead of using a conventional commercial protective film (release paper, adhesive layer, transparent film), the upper core fabric It has a property to easily attach the transparent film without affecting the printed surface printed on.

Next, the upper fabric is attached on the formed adhesive layer.

Thereafter, UV light is irradiated to the attached upper fabric surface in order to cure the adhesive composition existing between the laminated core fabric and the upper fabric very quickly. At this time, the UV light is irradiated to the surface of the upper fabric is 200 to 450 nm wavelength, the UV light intensity is preferably 100-150W per 1cm 2 of the upper fabric, more preferably 120W. At this time, the limitation on the wavelength and intensity of the UV light depends on the characteristics of the adhesive composition to be cured, and the curing of the adhesive composition used in the present invention within the above range occurs experimentally most rapidly. In addition, the irradiation of the UV light can be easily performed using a UV lamp of a known configuration.

Looking in more detail with reference to Figure 1 showing a cross-sectional view of a packaging film according to an embodiment of the present invention,

First, the lamination step of the lower fabric 110 and the aluminum fabric 120 uses a dry laminate technique of a technical configuration known in the art, that is, the binding binder is arranged between the lower fabric 110 and the aluminum fabric 120 And the lower fabric 110, the coupling binder, and the aluminum fabric 120 is to be pressed simultaneously so that the lower fabric 110 and the aluminum fabric is laminated. Here, in some cases, a release paper attaching layer (not shown) of a known configuration may be formed on the rear surface of the lower fabric 110, and the binding binder is preferably a polyester-based polyurethane resin or polyisocyanate. .

Next, the aluminum fabric laminated with the lower fabric and the prepared core fabric 130 are laminated using the above-described dry laminate technique.

 Next, a desired design is printed on the laminated core fabric 130 to form a printed layer 140. At this time, the printing uses a known printing method such as offset and silk screen. The forming of the printed layer 140 may be performed on the surface of the core fabric 130 after laminating the aluminum fabric and the printed core fabric 130 which are laminated with the lower fabric by the above-described dry lamination technique. .

Next, an adhesive composition is applied to the printed layer 140 of the laminated core fabric 130 to form an adhesive layer 150. At this time, the adhesive composition is 30-35% by weight of urethane acrylate, 15-20% by weight of epoxy acrylate, 18-22% by weight of tripropylene glycol acrylate, 16-20% by weight of 2-HEMA (2-hydroxy-ethyl methacrylate) %, Photoinitiator 5-10% by weight, adhesive sensitizer 1-2% by weight, in order to apply the adhesive composition, dilute the adhesive composition to 25-30% by weight with ethyl acrylate to dry 2.0 Apply under conditions of -4.0 g / m 2.

Next, the upper fabric 160 is attached on the adhesive layer 150, the upper fabric 160 is a transparent film film made of any one material of polyethylene terephthalate resin, polypropylene resin or OPP in terms of its characteristics Preferably, it is a film of a polyethylene terephthalate resin material more preferably.

Subsequently, in order to cure the adhesive composition present between the laminated core fabric 140 and the upper fabric 160, UV is applied to the surface of the attached upper fabric 160 by using an ultraviolet lamp (UV lamp). Irradiate the beam. At this time, the UV light is irradiated to the surface of the upper fabric preferably has a wavelength of 200-450 nm, the intensity of the UV light is 100-150W per 1cm 2 of the upper fabric.

After the packaging film 100 according to the present invention completed through such a process is processed in a suitable form according to a known processing method, the release paper attaching layer of a known technical configuration on the back of the lower fabric 110 (not shown) If there is no release paper adhesion layer depending on whether or not) is formed in the known in-mold method at the same time put the film to be printed in place of the packaging film 100 according to the present invention instead of injecting a desired container The packaging film 100 may be attached, and if there is a release paper attaching layer on the lower fabric 110, after removing the release paper of the release paper attaching layer, the sticky film attaches the packaging film 100 to a desired container. The packaging film 100 may be attached to a desired container.

Here, both the in-mold method and the sticky method should be attached so that the lower fabric 110 and the injected container 200 of the packaging film 100 according to the present invention are adjacent to each other as shown in FIG. 2. In the case of the in-mold method in particular, since the lower fabric 110 of the injected container 200 and the packaging film 100 is the same material, the lower fabric 110 and the injected container 200 is in close contact with each other. The packaging film 100 is to be formed to be in-mold integrally with the container 200.

In addition, even when the packaging film 100 according to the present invention is produced in a sticky manner, after removing the release paper from the release paper attaching layer formed on the bottom of the lower fabric 110, the back surface of the lower fabric 110 is injected This is because it is natural to be attached adjacent to the container (200).

According to the present invention through such a technical configuration can not only increase the preservation of the storage stored in the container 200, but also has a problem that the packaging film 100 attached to the container 200 falls, and looks Not only is the sense of aesthetic sense, but also the effect of advertisement.

Therefore, those skilled in the art will be able to make various modifications, changes, additions, and the like within the spirit and scope of the present invention, and such modifications should be regarded as belonging to the following claims.

As described above, the manufacturing method of the label packaging film according to the present invention and the label packaging film produced by the manufacturing method have the following effects.

First, the label packaging film produced by the method for manufacturing a label packaging film according to the present invention does not occur deformation of the fabric at 20-40 ℃.

In addition, the label packaging film manufactured by the method for manufacturing a label packaging film according to the present invention is made of a release paper, an adhesive layer and a transparent film by using a new adhesive composition that can protect the printing surface. By applying the new adhesive composition on the printing surface of the label in the manufacturing process of the label without using it, and then attaching a transparent film can not only reduce the manufacturing cost but also improve workability.

In addition, the label packaging film manufactured by the method for manufacturing a label packaging film according to the present invention can block the light including ultraviolet rays, thereby improving the preservation of the packaged contents.

In addition, the label packaging film manufactured by the method for manufacturing a label packaging film according to the present invention improves workability by solving a curling problem so that the cross section of the packaging film does not curl over time.

In addition, according to the method of using the packaging film for the label according to the present invention, not only the in-mold method and the sticky method can be selected according to the user's convenience, but also in the case of the in-mold method, the container and the packaging film are attached to the in-mold method. The use of the packaging film simplifies the use of the packaging film, thereby reducing the manufacturing cost of the packaging packaged with the packaging film and facilitating the recycling of the packaged container.

Claims (12)

Laminating the lower fabric and the aluminum fabric; Laminating the laminated aluminum fabric and the core fabric; Printing on the laminated core fabric; Forming an adhesive layer on the printed surface of the core fabric; Attaching an upper fabric to the adhesive layer; And Method of manufacturing a packaging film for a label comprising the step of irradiating the UV light on the upper fabric surface. The method of claim 1, wherein the UV light is irradiated to the surface of the upper fabric has a wavelength of 200-450 nm, the manufacturing method of the label packaging film, characterized in that irradiated with an intensity of 100-150W per 1cm 2 of the upper fabric. According to claim 1, wherein the adhesive layer is 30-35% by weight urethane acrylate, 15-20% by weight epoxy acrylate, 18-22% by weight tripropylene glycol acrylate, 2-HEMA (2-hydroxy-ethyl methacrylate) 16 -20% by weight, photoinitiator 5-10% by weight, adhesive sensitizer 1 to 2% by weight of the adhesive packaging composition characterized in that it is formed of a packaging film. The method of claim 1, wherein the lower fabric is a polypropylene synthetic resin or polyethylene synthetic resin, the thickness of the manufacturing method of the label packaging film, characterized in that 20-40㎛. The method of claim 1, wherein the core fabric is a paper or synthetic resin, the thickness of the manufacturing method of the label packaging film, characterized in that 30-60㎛. The method of claim 1, wherein the upper fabric is a polyethylene terephthalate resin, a polyethylene resin or OPP having a transparent property, the thickness of the manufacturing method of the packaging film label, characterized in that 12-20㎛. The method of claim 1, further comprising the step of printing on the surface of the upper fabric of the label packaging film. 8. The method of claim 1, wherein the lower fabric comprises a release paper attaching layer formed on a rear side of the lower fabric not adjacent to the aluminum fabric. 9. Label packaging film produced by the method of any one of claims 1 to 8. The label packaging film of claim 9, wherein the label packaging film is not deformed or curled at 20-40 ° C. A method for using a label packaging film, characterized in that the label packaging film produced by the manufacturing method of any one of claims 1 to 7 is used in an in-mold manner to be attached at the same time to eject the desired container. Method of using a label packaging film, characterized in that the label packaging film prepared by the method of claim 8 is used in a sticky manner in a desired container.

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