JPH1185035A - Vapor deposited label - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to easily peel and remove a label from a bottle container and to recycle the bottle container by providing the surface of a paper base material with an extruded film layer formed by extrusion molding of a thermoplastic resin soluble in an aq. alkaline soln. SOLUTION: The surface of the paper base material 2 is provided with the extruded film layer 3 formed by extrusion molding of the thermoplastic resin soluble in the aq. alkaline soln. Further, the surface of the extruded film layer 3 is successively provided with a vapor deposited aluminum layer 4, a primer coating layer 5, a printing layer 6 and an over-coating layer 7. If the bottle container is washed by using the aq. alkaline soln., the vapor deposited label 1 is easily peeled and removed from the bottle container in the part of the extruded film layer 3 formed by extrusion molding of the thermoplastic resin soluble in the aq. alkaline soln. constituting the label. As a result, the easy decomposition of the bottle container and the label 1 is made possible and the recycling of the container is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vapor-deposited label, and more particularly, to a vapor-deposited label, which has a washing bottle suitability, and can easily peel off and remove the vapor-deposited label from a bottle container to which the vapor-deposited label is attached. The present invention relates to a vapor deposition label that allows a bottle container to be easily reused.

[0002]

2. Description of the Related Art Various forms of labels to be attached to the surface of bottle containers such as beer bottles, sake bottles, and others have been developed and proposed. By the way, in recent years, bottle containers such as beer bottles, sake bottles, etc. have been collected and reused after use from the viewpoint of environmental protection and resource saving. Then, after using the bottle container, collect it,
In order to be reused, it is desirable that the label attached to the surface of the bottle container be designed so that it can be easily peeled off and removed from the surface of the bottle container. In recent years, as a label for bottle containers, usually,
On one surface of the paper base material, a coating film is formed by a coating agent comprising an aqueous solution, an emulsion or a dispersion containing a resin soluble in an aqueous alkaline solution as a main component of the vehicle. A vapor deposition label is formed by sequentially forming an aluminum vapor deposition film layer, a primer layer, a print pattern layer such as a character and a picture, and an overcoat layer on the coating film, and forming the vapor deposition label. The paper base is used with the surface of the paper base facing the surface of the bottle container and pasted to the surface of the bottle container with starch glue or the like. This one is
After collecting the bottle container and washing it with an alkaline aqueous solution,
It is widely used because the coating film constituting the label is dissolved and removed with an alkaline aqueous solution during the washing, and the label can be easily peeled off and removed from the surface of the bottle container.

[0003]

However, in a label having the above structure, a coating agent comprising an aqueous solution, emulsion, dispersion or the like containing an alkali-water-soluble resin as a main component of a vehicle. From the use of, for example, the preparation of a liquid as a coating agent, coating operation, drying operation, various steps such as aging operation are required, many manufacturing processes,
In addition, there is a problem that it is complicated and its management is complicated. Particularly, adjustment of a coating agent, adjustment of a coating film thickness, and the like require many years of skill. Therefore, the present invention does not require a complicated manufacturing process, and does not require many years of skill, etc., easily peels off and removes from the bottle container, easily separates the bottle container and the label, It is intended to provide a label that allows the container to be reused.

[0004]

As a result of various studies to solve the above problems, the present inventor has used a thermoplastic resin soluble in an aqueous alkali solution, and manufactured a film by extrusion molding from this. Paying attention to the fact that the extruded film is solubilized with an aqueous alkaline solution, this is used in combination with a paper-based substrate as a label substrate, and a thermoplastic resin soluble in an alkaline aqueous solution is extruded on the paper-based substrate. The extruded film layer is provided, and an aluminum vapor-deposited film layer, a primer coat layer, a printing layer, and an overcoat layer are sequentially provided on the surface of the extruded film layer to produce a vapor-deposited label. Then, the vapor-deposited label was affixed to the surface of a bottle container such as a beer bottle, and then the bottle container was immersed in an alkaline aqueous solution and washed. Extruded film layer dissolves produced by extrusion constituting the label in solution, to remove, easily peeled deposition label from the bottle container, can be removed,
As a result, a bottle container and a vapor deposition label can be easily separated, and a vapor deposition label capable of reusing the bottle container has been found, and the present invention has been completed.

That is, according to the present invention, an extruded film layer formed by extruding a thermoplastic resin soluble in an aqueous alkali solution is provided on a paper base material, and an aluminum vapor-deposited film layer, a primer The present invention relates to a vapor-deposited label characterized by sequentially providing a coat layer, a print layer, and an overcoat layer.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail below. The vapor deposition label according to the present invention will be described with reference to the drawings by exemplifying a specific example. FIG. 1 is a schematic sectional view showing the layer configuration of the vapor deposition label according to the present invention. The vapor-deposited label 1 according to the present invention basically has a structure shown in FIG.
As shown in FIG. 2, an extruded film layer 3 formed by extruding a thermoplastic resin soluble in an aqueous alkaline solution is provided on a paper base material 2, and further, on the surface of the extruded film layer 3,
It has a structure in which an aluminum deposited film layer 4, a primer coat layer 5, a print layer 6, and an overcoat layer 7 are sequentially provided.

Next, in the present invention, the usage of the vapor deposition label according to the present invention as described above will be described.
FIG. 2 and FIG. 3 are schematic cross-sectional views showing an example of a usage form of the vapor deposition label according to the present invention. That is, as shown in FIG. 2, the vapor deposition label according to the present invention uses the vapor deposition label 1 shown in FIG. A bottle container 10 with a vapor deposition label 1 is manufactured by superimposing on the surface of a bottle container 10 such as a bottle and bonding both of them via an adhesive layer 11 such as starch paste or casein. Thus, in the present invention, the bottle container 10 having the above-described vapor deposition label 1 is provided.
The bottle 12 is filled with the contents 12, and thereafter the opening of the bottle container 10 is sealed with a lid 13 to produce a bottle package product A. By the way, in the present invention, as shown in FIG. 3, the content 1 of the bottle package product A manufactured as described above is used.
When the bottle 2 is used and then washed with an alkaline aqueous solution in the bottle 10, the vapor-deposited label 1 dissolves or swells at the extruded film layer 4 formed by extruding a thermoplastic resin soluble in the alkaline aqueous solution constituting the label. Then, the extruded film layer 4 can be easily peeled off and removed from the bottle container 10 so that the bottle container 10 and the vapor deposition label 1 can be easily separated, and the bottle container 10 is reused. Is what you can do. The use form of the vapor deposition label according to the present invention illustrated above is merely an example, and the present invention is not limited thereto, and the vapor deposition label according to the present invention is applied to the surface of various bottle containers. Can be applied.

Next, in the present invention, the material constituting the above-described vapor deposition label according to the present invention or the method for producing the same will be described. First, in the present invention, a label is used as a paper base material. It is desirable to have excellent properties in mechanical, physical, chemical, etc., because it is a basic material to constitute, specifically, for example, natural pulp, synthetic pulp, or if necessary, added Paper, synthetic paper, imitation paper, tissue paper, clay-coated paper,
Paper base materials such as kraft paper, various types of paperboard, and processed paper can be used. Thus, the basis weight of the paper base material is about 20 to 250 g / m ² ,
The one having about 00 g / m ² can be used.

Next, in the present invention, the thermoplastic resin soluble in an alkaline aqueous solution forming an extruded film layer formed by extruding a thermoplastic resin soluble in an aqueous alkaline solution constituting the vapor deposition label according to the present invention includes:
For example, acrylic esters, methacrylic esters,
(Meth) acrylic monomers such as hydroxylethyl acrylate and hydroxylethyl methacrylate; nitrile monomers such as acrylonitrile and methacrylonitrile; amide monomers such as acrylamide and methacrylamide; and amide monomers. An N-alkoxy substituent,
The same N-methylol-substituted product, styrene, vinyltoluene,
Styrene monomers such as α-methylstyrene and divinylbenzene, diallyl phthalate, allyl glycidyl ether
One or more of allyl monomers such as ter, triallyl isocyanurate, etc .; monomers having a polymerizable double bond such as vinyl acetate and N-vinylpyrrolidone; and acrylic acid and methacrylic acid having a carboxyl group. Uses a (meth) acrylic copolymer that is soluble in an aqueous alkali solution and is a copolymer of one or more unsaturated carboxylic acids such as maleic acid, maleic anhydride, fumaric acid, itaconic acid, and others. can do.

In the present invention, the molecular weight (Mw) of the above (meth) acrylic copolymer soluble in an aqueous alkali solution is about 10,000 to 200,000, and the glass transition temperature (Tg) ) Is 60 to 120 ° C
As for the acid value and the acid value, those having a value of about 50 to 500 mgKOH / g, and more preferably about 100 to 500 mgKOH / g can be used. In the above, those having an acid value of 50 or even 100 mgKOH / g or less have a slow dissolution in an aqueous alkali solution, and have an acid value of 500 mgKOH / g.
Those with g or more are undesirable because they cause corrosion or the like in a processing machine during melt processing when forming a film, or cause decomposition or the like by themselves.

According to the present invention, in order to form an extruded film formed by extruding a (meth) acrylic copolymer soluble in an aqueous alkaline solution as described above,
For example, using a pellet of a (meth) acrylic copolymer soluble in an aqueous alkaline solution as described above,
If necessary, for example, optional additives such as fillers, stabilizers, plasticizers, film reinforcing agents, defoamers, etc. are optionally added,
For example, an extruded film or sheet can be produced by forming a film using an extrusion molding method such as a T-die method, an inflation method, a co-extrusion method, an extrusion lamination method and the like. . In the present invention, the thickness of the film or sheet is, for example, 2 to 4
About 0 μm, preferably about 10 to 30 μm is desirable.
More specifically, in the present invention, a (meth) acrylic copolymer soluble in an aqueous alkaline solution is melted and extruded and laminated on a paper base material using a T-die method or the like. be able to. In the above, since the surface state of the chill roll in the T-die method is directly transferred to the surface of a melt-extruded thin film of a (meth) acrylic copolymer soluble in an aqueous alkali solution, the surface of the chill roll is smoothed. The surface state of the aluminum deposited film layer to be provided next can be changed by making the surface or the fine embossed surface, and for example, the gloss and the like can be freely set.

Next, in the present invention, as the aluminum vapor-deposited film layer constituting the vapor-deposited label according to the present invention, for example, a (meth) acrylic copolymer soluble in an alkaline aqueous solution as described above is extruded. On the extruded film layer, a physical vapor deposition method (Physical Vapor method) such as a vacuum vapor deposition method, a sputtering method, or an ion plating method using aluminum as a vapor deposition source.
Deposition method, PVD method) or a chemical vapor deposition method such as a plasma chemical vapor deposition method, a thermal chemical vapor deposition method, or a photochemical vapor deposition method.
(r Deposition method, CVD method) or the like can be used to form an aluminum deposition film. In the above, the thickness of the aluminum deposition film is 300
It is preferably about 1000 °.

Next, in the present invention, as the primer coat layer constituting the vapor deposition label according to the present invention,
An extruded film layer formed by extruding a (meth) acrylic copolymer soluble in an alkaline aqueous solution as described above, which serves as a base layer on which a printing layer described later is provided, can be used in the same manner. Furthermore, in the present invention, the primer coat layer may be, for example, one or more of the above-mentioned (meth) acrylic copolymers soluble in an aqueous alkali solution, or one or more of a water-soluble resin. An aqueous solution, a colloidal suspension, an emulsion composition, or the like containing the above as a main component of the vehicle is prepared, and is prepared by, for example, roll coating, gravure coating, die coating.
, A kiss coat, an air knife coat, and others. In the coating film as described above, if necessary, for example, a desired additive such as a filler, a stabilizer, a plasticizer, a film reinforcing agent, an antifoaming agent, etc. is optionally added, The physical properties of the film can be adjusted. In the above, as the water-soluble resin, for example, polyallylamide, polyacrylic acid,
Synthetic resins such as polyethylene oxide and poly-N-vinylpyrrolidone, natural polymers such as polynucleotides and polypeptides, shalac, nitrocellulose resins, and others can also be used. In the above, the thickness of the primer coat layer is about 0.8 to 1.2 g / m2.
Position ² is preferred.

Further, in the present invention, as a printing layer constituting the vapor deposition label according to the present invention, for example, a desired printing pattern such as a character, a figure, a picture, a symbol, etc. can be formed by an offset printing method, a gravure printing method, or the like. In a printing method such as letterpress printing method, screen printing method, etc., a printing ink suitable for the printing method, for example, nitrocellulose resin, polyamide resin, or a mixture thereof is used as a main component of the vehicle. It can be formed by using an ink composition obtained by arbitrarily adding necessary additives and the like and kneading them sufficiently.

In the present invention, the material constituting the overcoat layer constituting the vapor deposition label according to the present invention has excellent mechanical, physical, chemical and other properties. Resin films or sheets can be used, and specifically, for example, polyester resins, polyamide resins, polyaramid resins, polyethylene resins, polypropylene resins, polycarbonate resins, polyacetaters -Resin, polystyrene resin,
Fluorine resin, phenol resin, (meth) acrylic resin, cellulose resin, urethane resin, iono
A tough resin film or sheet such as a base resin or the like can be used. Thus, as the resin film or sheet, any one of an unstretched film and a stretched film stretched in a uniaxial or biaxial direction can be used. Further, in the present invention, the thickness of the resin film may be a thickness capable of maintaining strength, rigidity and the like to the minimum necessary, and is about 5 μm to 50 μm, preferably about 10 μm.
The order of m to 30 μm is most desirable. In the present invention, as the overcoat layer, for example, a coating film or a printing film formed by coating or printing a resin composition containing the above-described resin as a main component of a vehicle is also used. be able to. The thickness of the coating film or the printing film is about 0.2 to 10 μm in dry film thickness, preferably,
0.3 to 3 μm is desirable.

Next, in the present invention, as a laminating method for producing the vapor-deposited label according to the present invention using the above-mentioned materials, a method of laminating a usual packaging material, for example, a wet method Lamination method, dry lamination method, solventless dry lamination method, extrusion lamination method, T-die extrusion molding method, inflation method, co-extrusion lamination method, co-extrusion inflation method, etc. And so on. Thus, in the present invention, when performing the above-mentioned lamination, if necessary, a pretreatment such as a corona treatment or an ozone treatment can be performed on the film, and for example, an isocyanate-based (urethane) Anchoring agents such as polyethyleneimine, polybutadiene and organotitanium, or laminating agents such as polyurethane and polyac.
A well-known anchor coating agent such as an adhesive for coating, an adhesive or the like can be used.

Next, in the present invention, the vapor-deposited label according to the present invention produced as described above is, for example, a liquor or a beer.
Glass bottles used for filling and packaging of products, seasonings, etc., various plastic bottles or plastic containers manufactured by molding methods such as injection molding, blow molding, extrusion molding, etc., It can be used by sticking it to the surface of various other containers.

In the above, the resin constituting the plastic bottle or the plastic container is, for example, polyethylene resin, polypropylene resin, polystyrene resin, polycarbonate resin, polyester resin, polyamide resin, polychlorinated resin. A vinyl resin, a polyacrylonitrile resin, a styrene-acrylonitrile copolymer, a styrene-butadiene-acrylonitrile copolymer, an acetal resin, and the like can be used.

[0019]

Next, the present invention will be described more specifically with reference to the following examples. Example 1 ^On a paper having a basis weight of 65 g / m ² , an acid value of 120 mg KOH was used.
/ G of acrylic copolymer soluble in aqueous alkaline solution
It was extruded from a T-die at 00 ° C. and laminated with a thickness of 20 μm. Next, on the acrylic copolymer film, using a vacuum evaporation machine, under a condition of 10 ^-4 Torr, a thickness of 500Å
Was deposited. Further, an acid value of 120 on the aluminum vapor-deposited film in the same manner as described above.
Acrylic copolymer soluble in an aqueous alkali solution of mgKOH / g was extruded from a T-die at 200 ° C.
Laminated with thickness. Next, a predetermined printing pattern is formed on the acrylic copolymer film by a gravure printing method using an ink composition containing nitrocellulose as a main component of a vehicle, and further, the entire surface including the printing pattern is formed. Then, a nitrocellulose-based lacquer was applied by a gravure reverse coating method to form an overcoat layer, thereby producing a vapor-deposited label according to the present invention.

Comparative Example 1 In Example 1, the acid value was 120 mgKOH / g.
Low-density polyethylene (density, 0.923 g / c)
m ³ , melt index, MI, 3.7, melting point, 11
1 ° C.), and thereafter, a vapor deposition label was manufactured in the same manner as in the method described in Example 1 above.

Experimental Example The vapor-deposited labels prepared in Example 1 and Comparative Example 1 were used, and the labels were bonded to the surface of a vial using starch paste. Next, the bottle container to which the label is attached is immersed in a 3.0 wt% NaOH aqueous solution at 60 ° C., and the time until the label is peeled off and removed from the bottle container, and
The gloss of the aluminum deposited film was observed. The results are shown in Table 1 below. In addition, peeling and removal time (suitability for washing bottle)
The gloss was measured with a clock, and the gloss was visually measured.

[0022]

[Table 1]

As is clear from the above results, Example 1
Was excellent in peeling, removal time (suitability for washing bottle), and gloss.

[0024]

As apparent from the above description, the present invention uses a thermoplastic resin soluble in an aqueous alkali solution,
From now on, a film is manufactured by extrusion molding, and attention is paid to the fact that the extruded film is solubilized with an alkaline aqueous solution, and this is used in combination with a paper base material as a label base material. An extruded film layer formed by extruding a soluble thermoplastic resin is provided on the surface of the extruded film layer, and an aluminum vapor-deposited film layer, a primer coat layer, a printed layer, and an
A vapor coating label is manufactured by sequentially providing a bar coat layer, and the vapor deposition label is affixed to the surface of a bottle container such as a beer bottle, and then the bottle container is washed by being immersed in an alkaline aqueous solution. The extruded film layer manufactured by extrusion forming the label with an alkaline aqueous solution at the time of this washing can be dissolved and removed, and the vapor-deposited label can be easily peeled off and removed from the bottle container. The label can be easily separated from the label, and a vapor-deposited label capable of reusing the bottle container can be manufactured.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a layer configuration of a vapor deposition label according to the present invention.

FIG. 2 is a schematic cross-sectional view showing an example of a usage form of the vapor deposition label according to the present invention.

FIG. 3 is a schematic cross-sectional view showing an example of a usage form of the vapor deposition label according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Deposition label 2 Paper base material 3 Extruded film layer 4 Aluminum deposition film layer 5 Primer coat layer 6 Printing layer 7 Overcoat layer 10 Bottle container 11 Adhesive layer 12 Contents 13 Cover material A bottle Packaging products

Claims (3)

[Claims] An extruded film layer formed by extruding a thermoplastic resin soluble in an aqueous alkali solution is provided on a paper base material, and further, an aluminum vapor-deposited film layer, a primer coat is provided on the surface of the extruded film layer. A vapor-deposited label comprising a layer, a printing layer, and an overcoat layer sequentially provided. 2. An extruded film layer formed by extruding a thermoplastic resin soluble in an aqueous alkali solution, comprising an extruded film layer of a (meth) acrylic copolymer soluble in an aqueous alkaline solution. The vapor deposition label described in. 3. An extruded film layer formed by extruding a thermoplastic resin soluble in an alkaline aqueous solution, has an oxidation resistance of 10%.
3. The vapor-deposited label according to claim 1, comprising an extruded film layer of a (meth) acrylic copolymer soluble in an aqueous alkali solution having a concentration of 0 to 500 mgKOH / g.