KR20200004676A - A label being taken off easily from the adherend - Google Patents

Abstract

The present invention relates to a label paper easily detached from an adherend, which comprises: a substrate layer and a dissociating layer and an adhesive layer provided on the substrate layer. The label paper is easily removed from an adherend, thereby being easy to recycle and eco-friendly.

Description

Easily removable labels from adherents {A LABEL BEING TAKEN OFF EASILY FROM THE ADHEREND}

The present invention relates to a label paper that is easily removable from an adherend.

Recently, recycling wastes occurred as a Seoul Metropolitan area recycling company refused to collect recycled materials such as vinyl and plastic.

Ordinary PET bottles are classified as plastic recycled products, but the reality is that they are thrown away without removing the labels on the PET bottles. Such label paper has to be removed once again in the recycling phase with vinyls, which is not only cumbersome but also has a problem in that it is not properly recycled.

In order to improve such a problem, an example of a technique for enabling a label to be used as a beverage cup is disclosed in Patent Document 1 below.

That is, the following Patent Document 1 relates to a label that is installed along the surface circumference of the beverage container so that two sheets of paper are superimposed on each other and both sides are high frequency welded to be attached to the surface of the beverage container. A first sheet and a second sheet sheet folded and folded to be formed higher than the first sheet sheet, and a first attachment surface formed by overlapping both side surfaces of the first sheet sheet and the second sheet sheet A partition line partitioning the first sheet paper and the second sheet paper and a partition portion formed by the partition line and separated from the first sheet paper and the second sheet paper by cutting of the partition line, and a suture portion formed inside the beverage sheet portion. It is made about the completion.

However, Patent Document 1 as described above has a problem in that a cost is generated because the machine must be additionally purchased for the manufacture of the label paper, and the manufacturing time is long because the process is complicated.

Republic of Korea Utility Model No. 20-2011-0005550

An object of the present invention is to provide a label sheet which is easily detachable from the surface of the adherend.

The object of the present invention is not limited to the above-mentioned object. The object of the present invention will become more apparent from the following description, and will be realized by the means described in the claims and combinations thereof.

The label according to an embodiment of the present invention includes a base layer and a dissociation layer and an adhesive layer provided on the base layer.

The dissociation layer may be included in 20 to 90% of the total area of the base layer.

The dissociation layer may be laminated on at least one region of the adhesive layer.

The dissociation layer may be dissociated in water.

The dissociation layer is starch (alpha-Maltose), polyacrylate (Polyacrylate), polymethacrylic acid, Carboxyvinylpolymer, polyvinyl alcohol, Polyacrylamide, polyethylene Oxide (Polyethylene oxide), Polyethyleneimine, Polyvinylpyrrolidone, Methyl cellulose (MC), Cellulose, Carboxymethyl cellulose, Hydroxyethyl cellulose ( Hydroxuethyl cellulose) and combinations thereof may be at least one selected from the group consisting of.

The adhesive layer is the adhesive layer of polyester resin (Polyester Resins) 30-50% by weight, methyl ethyl ketone (MethylEthylKetone) 20-30% by weight, toluene 20-30% by weight, polyester polyol (Polyester polyol) 1- 10% by weight, 1-5% by weight of isocyanate, 0.1-5% by weight of polyethylene wax (PolyEthylene Wax) and 0.01-1% by weight of a filler may be included.

The adhesive layer may further include 3 to 20% by weight of the blowing agent based on the total weight.

The blowing agent is magnesium hydroxide, azodicarbonamide, oxydibenzenesulfonylhydrazide (OBSH), p-toluenesulfonyl hydrazide, sodium bicarbonate, sodium bicarbonate ), Hydrocarbon, hydrocarbon, ethylene vinyl acetate (ethylene-vinyl acetate, EVA) and a combination thereof may include at least one selected from the group consisting of.

The adhesive force of the adhesive layer may be lost at a water temperature of 60 ~ 90 ℃.

The filler is silica, aluminum oxide, magnesium oxide, magnesium oxide, calcium oxide, aluminum hydroxide, magnesium hydroxide, calcium hydroxide, carbon (Carbon), zirconia (Zirconia, Zirconium oxide), antimony oxide (Antimony oxide) may include at least one selected from the group consisting of.

The label paper of the present invention can be easily detached from the adherend in water by including a dissociation layer, so the separation and collection is easy and there is an environmentally friendly advantage.

1 is a perspective view showing the adherend attached to the label.
2 is an exploded perspective view of FIG. 1.
3A and 3B are sectional views showing label sheets.
4 is a plan view showing a label sheet.

Objects, other objects, features and advantages of the present invention will be readily understood through the following preferred embodiments associated with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosure may be made thorough and complete, and to fully convey the spirit of the invention to those skilled in the art.

In describing the drawings, similar reference numerals are used for similar elements. For example, if a part of a layer, film, region, plate, etc. is said to be "on" another part, this includes not only the other part "on top" but also another part in the middle.

Hereinafter, the structure of the label paper of this invention is demonstrated in detail.

1 is a perspective view showing the adherend attached to the label, Figure 2 is an exploded perspective view of FIG.

1 and 2, the label sheet 10 of the present invention may be attached to one region of the adherend 1, where the label sheet 10 is formed on the base layer 11 and the base layer 11. The adhesive layer 12 and the dissociation layer 13 which are provided in are included. In addition, letters or pictures may be printed on the other surface of the base layer 11 that is not provided with the adhesive layer 12 or the dissociation layer 13.

The base layer 11 may be polyethylene (PE), polyethylene terephthalate (PET), polypropylene (PP), polybutylene terephthalate (PBT), polyethylene naphthalate (Polyethylenenaphthalate, PEN), It may be at least one selected from the group consisting of polybutylene naphthalate (Polybutylenenaphthalate (PBN)) and combinations thereof, preferably polyethylene (PE) or polyethyl terephthalate (PET).

The adhesive layer 12 is 30-50% by weight of polyester resin, 20-30% by weight of methyl ethyl ketone, 20-30% by weight of toluene, polyester polyol 1-10 Weight%, 1-5% by weight of isocyanate, 0.1-5% by weight of polyethylene wax (PolyEthylene Wax) and 0.01-1% by weight of filler, and 3 to 20% by weight foaming agent, based on the total weight depending on the application It may further include%. Each component of the above-mentioned adhesive layer 12 will be described later in detail.

The adhesive layer 12 may always be in an adhesive or tacky state, but may also be adhesive or tacky by temperature, and physical properties may be solid or liquid, and may exist in various states according to temperature change. In the present invention, the adhesive layer 12 is described as being limited to the adhesive layer for in-mold labeling, but the present invention is not limited thereto and may be applied to various fields. For example, in the case of the in-mold adhesive layer, the adhesive layer is vitrified at a temperature of 50 to 70 ° C., but has a tacky property. However, since the adhesive layer is present in a solid state in which the adhesiveness is lost at room temperature, the dissociation layer 13 may be more on the adhesive layer 12. There is an advantage that can be easily formed.

When the adhesive layer 12 includes a blowing agent, the blowing agent may lose adhesive force at a water temperature of 60 to 90 ° C, preferably 70 to 80 ° C, and more preferably 70 ° C. In detail, since the foaming agent of the adhesive layer 12 starts foaming at a water temperature of 60 to 90 ° C., the adhesive force is lost by specific gravity, so that the label paper 10 may be detached or removed from the adherend 1, and will be described later. The label 10 may be more easily removed by dissociating the layer 13 into water.

The dissociation layer 13 is composed of starch (alpha-Maltose), polyacrylate, polymethacrylic acid, polymethacrylic acid, carboxyvinylpolymer, polyvinyl alcohol, and polyacrylamide. , Polyethylene oxide, polyethyleneimine, polyvinylpyrrolidone, methyl cellulose (MC), cellulose (Cellulose), carboxymethyl cellulose, hydroxyethyl It may be at least one selected from the group consisting of cellulose (Hydroxuethyl cellulose) and combinations thereof, preferably at least one selected from the group consisting of starch, polyvinyl alcohol, polyvinylpyrrolidone, and combinations thereof. . In the above description, but limited to the components of the dissociation layer 13 is not limited thereto, and any material that can be dissociated in water is not particularly limited.

The dissociation layer 13 is dissociated in water so that the label 10 can be easily separated from the adherend 1, and the higher the temperature of the water, the faster the dissociation rate can proceed. Therefore, the time for the label sheet 10 to be detached from the adherend 1 can be adjusted according to the temperature of the water.

3A and 3B are cross-sectional views showing label sheets, and FIG. 4 is a plan view illustrating label sheets.

The dissociation layer 13 may be provided on the base layer 11 as shown in FIG. 3A, but may be provided on the same line as the adhesive layer 12, or may be provided on the adhesive layer 12 as shown in FIG. 3B. It may be.

When the dissociation layer 13 is provided on the adhesive layer 12 formed on the base layer 11, only the dissociation layer 13 is directly adhered or adhered to one surface of the adherend 1, and thus the dissociation layer ( The label 10 can be easily detached from the adherend 1 by dissociation in water. On the other hand, when the dissociation layer 13 is provided on the same line as the adhesive layer 12, the dissociation layer 13 Even if dissociated in water, since the adhesive layer 12 is attached to the adherend 1, it takes longer for the label paper 10 to be detached from the adherend 1 or by applying a little force from the outside so that the label 10 It may be easy to remove.

When the adhesive layer 12 further includes a blowing agent, foaming of the adhesive layer 12 may be initiated after the dissociation layer 13 is dissociated in water according to the temperature of water, and the dissociation of the dissociation layer 13 and the adhesive layer 12 are initiated. Foaming may occur simultaneously to allow the labeling paper 10 to be more easily removed from the adherend 1.

As described above, since the dissociation layer 13 is provided in the substrate layer 11 of the present invention, the label paper 10 can be more easily detached or removed from the adherend 1, so that it is easy to separate and collect the environment. It can be friendly. In addition, since the time taken to remove the label sheet 10 from the adherend 1 can be shortened, time can be saved.

The dissociation layer 13 may be provided to occupy 30 to 70%, preferably 40 to 60%, based on the total area of the base layer 11 or the adhesive layer 12, as shown in FIG. The present invention is not limited thereto, and may be adjusted and applied within a ratio range of 20 to 90% according to the degree of adhesion or adhesive force required in the applied field.

In addition, although the adhesive layer 12 or the dissociation layer 13 is illustrated in a rectangular shape in FIG. 4, the adhesive layer 12 or the dissociation layer 13 is not limited thereto and may be formed to have various shapes such as lines, triangles, and squares.

Hereinafter, the components of the adhesive composition for labeling of the present invention and the reasons for limitation of each component will be described.

Polyester Resins have a glass transition temperature of 10 to 70 ° C, which is released by heat to impart adhesion to the adherend, and is 30 to 50% by weight, preferably 35 to 45% by weight, based on the total weight. % May be included. If it is less than 30% by weight, the adhesive force may be lost, and if it is more than 50% by weight, the adhesive force may become strong, and detachment may be difficult.

Methyl ethyl ketone (MethylEthylKetone) is the main solvent for dissolving the polyester resin, 20-30% by weight, preferably 15-25% by weight based on the total weight. If it is less than 20% by weight, the polyester resin may not be properly melted, and if it exceeds 30% by weight, it may be difficult to process due to the addition of the necessary main solvent.

Toluene (Toluene) is a co-solvent for controlling the viscosity of the polyester resin, 20 to 30% by weight, preferably 23 to 28% by weight based on the total weight. If it is less than 20% by weight, the adhesive strength during coating in the labeling process may be weakened, if it exceeds 30% by weight, it may take a long time to dry due to the high viscosity.

Polyester polyol is a material added to improve the adhesion performance between the base layer and the adhesive layer by causing a urethane reaction with isocyanate, and is 1 to 10% by weight, preferably 3 to 8% by weight based on the total weight. % May be included. If it is less than 1% by weight, it may be difficult to prepare a label because the adhesive effect between the base layer is insignificant, if it exceeds 10% by weight, the production cost may be increased due to the addition of more than necessary.

Isocyanate is a material that is added to react with the polyol to improve heat and chemical resistance as well as substrate adhesion, and may be included in an amount of 1 to 5% by weight, preferably 2 to 3% by weight, based on the total weight. If it is less than 1% by weight, it may be difficult to secure heat resistance and chemical resistance, and when it exceeds 5% by weight, processing may be difficult.

Polyethylene wax (PolyEthylene Wax) is a material added to enable the mixture to form a crystal quickly, 0.1 to 5% by weight, preferably 0.5 to 3% by weight based on the total weight. If it is less than 0.1% by weight, the mixture may be unstable, and if it exceeds 5% by weight, processing may be difficult.

Filler is a material added to prevent blocking and improve slip or printability during the coating operation of the adhesive composition in the manufacturing process of the label paper, 0.01 to 1% by weight, preferably 0.05 to 0.5 Weight% may be included. If it is less than 0.01% by weight, slip or printability may be poor, and when it is more than 1% by weight, inconvenience may occur in a label paper manufacturing process.

Here, the filler is silica (Silica, SiO ₂ ), aluminum oxide (Aluminum oxide), magnesium oxide (Magnesium oxide), calcium oxide (Calcium oxide), aluminum hydroxide (Aluminum hydroxide), magnesium hydroxide (Magnesium hydroxide), calcium hydroxide (Calcium At least one selected from the group consisting of hydroxide, carbon, zirconia (Zirconia, Zirconium oxide), antimony oxide, and combinations thereof, preferably silica.

The blowing agent, which may be further included in the adhesive composition of the present invention, is a material added to improve adhesion between the adherend and the label, and may be included in an amount of 3-20 wt%, preferably 5-15 wt%, based on the weight of the filling. have. If it is less than 3% by weight, it may be difficult to detach the label from the adherend due to the adhesive loss of the adhesive composition at 60 ~ 90 ℃, if it exceeds 20% by weight, it may be difficult to secure the adhesion or adhesion required by the label itself .

Here, the blowing agent is magnesium hydroxide (Mg (OH) ₂), azodicarbonamide, oxydibenzenesulfonylhydrazide (OBSH), p-toluenesulfonyl hydrazide (p-toluenesulfonyl hydrazide) ), Sodium bicarbonate, hydrocarbon, hydrocarbon, ethylene-vinyl acetate, and at least one selected from the group consisting of a combination thereof, preferably magnesium hydroxide (Magnesium hydroxide) Can be. In contrast, the foaming agent may include a chemical foaming agent and a capsule foaming agent, and the chemical foaming agent and the capsule foaming agent may be combined in a weight ratio of 1: 1. If the content of the chemical foaming agent is greater than the content of the capsule foaming agent, it is difficult to control the particle size, and if the content of the capsule foaming agent is higher than the content of the chemical foaming agent, it may be difficult to secure the surface friction coefficient. In the above description, but limited to the components of the blowing agent, if the material can be foamed at a water temperature of 60 ~ 90 ℃, preferably 70 ~ 80 ℃, more preferably 70 ℃, it does not greatly limit the use. .

Example 1 Preparation of Labels

An adhesive was prepared by combining the contents of each component of the adhesive composition disclosed in Table 1 below.

The prepared adhesive was applied on a polyethylene film and then dried to form an adhesive layer. Then, a water-soluble polymer was applied to the adhesive layer and then dried to prepare a label paper having a dissociation layer formed thereon.

Table 1 is a table showing the components of each adhesive composition in weight percent.

division Example 1 Example 2 Example 3 Furtherance
range Polyester resin 40 40 40 Methyl ethyl ketone 25 25 20 toluene 25.9 25.9 20.9 blowing agent Magnesium hydroxide - - 10 Polyester polyol 5 5 5 Isocyanate 3 3 3  Polyethylene wax One One One Filler Silica 0.1 0.1 0.1 Dissociation 50% 25% 50%

Comparative Example 1. Label Production

Except not forming a dissociation layer on the adhesive layer, the content of each component of the adhesive composition of Example 1 was formulated to prepare a label of Comparative Example 1 by the same manufacturing method.

Test Example 1 Desorption Characteristics of Label Paper

After the label sheets obtained in Examples 1 to 3 and Comparative Example 1 according to the present invention were attached to the adherends, experiments were performed as follows to evaluate the desorption characteristics of the label sheets.

Plastic containers were used as adherends.

The plastic containers to which the labels of Examples 1 to 3 and Comparative Example 1 were respectively attached were soaked in water at 90 ° C., and the change of label was observed every two minutes.

Table 2 is a table showing the change of the label over time.

As a result, referring to Table 2, the label papers of Examples 1 to 3 were almost desorbed after 10 minutes from the container, but it was confirmed that the label paper of Comparative Example 1 was still attached to the container. Thus, it could be estimated that the dissociation layer of the label sheets of Examples 1 to 3 dissociated in water.

time Example 1 Example 2 Example 3 Comparative Example 1 2 minutes 0 0 0 0 4 minutes 10 5 10 0 6 minutes 40 20 50 0 8 minutes 80 60 90 0 10 minutes 97 80 99 0

As mentioned above, although the invention made by this inventor was demonstrated concretely according to the said Example, this invention is not limited to the said Example and can be variously changed in the range which does not deviate from the summary.

1: adherend
10: label
11: base layer
12: adhesive layer
13: dissociation

Claims (10)

Base layer; And
Label paper comprising a dissociation layer and an adhesive layer provided on the base layer.
The method of claim 1,
The dissociation layer is a label containing 20 to 90% of the total area of the base layer.
The method of claim 1,
The dissociation layer is a label that is laminated on at least one region of the adhesive layer.
The method of claim 1,
The dissociation layer is a label that is dissociated in water.
The method of claim 1,
The dissociation layer is starch (alpha-Maltose), polyacrylate (Polyacrylate), polymethacrylic acid, Carboxyvinylpolymer, polyvinyl alcohol, Polyacrylamide, polyethylene Oxide (Polyethylene oxide), Polyethyleneimine, Polyvinylpyrrolidone, Methyl cellulose (MC), Cellulose, Carboxymethyl cellulose, Hydroxyethyl cellulose ( A label comprising at least one selected from the group consisting of Hydroxuethyl cellulose) and combinations thereof.
The method of claim 1,
The adhesive layer is 30 to 50% by weight of polyester resin, 20 to 30% by weight of methyl ethyl ketone, 20 to 30% by weight of toluene, 1 to 10% by weight of polyester polyol Labels comprising 1 to 5% by weight of isocyanate, 0.1 to 5% by weight of polyethylene wax (PolyEthylene Wax) and 0.01 to 1% by weight of a filler.
The method of claim 6,
The adhesive layer is a label that further comprises 3 to 20% by weight relative to the total weight.
The method of claim 7, wherein
The blowing agent is magnesium hydroxide, azodicarbonamide, oxydibenzenesulfonylhydrazide (OBSH), p-toluenesulfonyl hydrazide, sodium bicarbonate Label, including at least one selected from the group consisting of hydrocarbon, ethylene-vinyl acetate (EVA), and combinations thereof.
The method of claim 7, wherein
The adhesive strength of the adhesive layer is lost in the water temperature of 60 ~ 90 ℃.
The method of claim 6,
The filler is silica, aluminum oxide, magnesium oxide, magnesium oxide, calcium oxide, aluminum hydroxide, magnesium hydroxide, calcium hydroxide, carbon Labels comprising at least one selected from the group consisting of Carbon, Zirconia, Zirconium oxide, Antimony oxide, and combinations thereof.

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