JP2014056269A - Label - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a label capable of preventing deterioration of metallic luster and formation of a curl.SOLUTION: A label 100 is configured to adhere to a metal can. The label 100 comprises: a transparent inorganic oxide evaporation layer 2 formed on a base material layer 1 made of a transparent plastic film; a protective layer 3 formed on a surface of the transparent inorganic oxide evaporation layer; a printing ink layer 4 formed on the protective layer; and a vapor-deposition anchor layer 5, an aluminum vapor deposition layer 6, and an adhesive layer 7 for adhesion onto the metal can sequentially formed. The protective layer is produced through applying, heating and desiccating a coating agent containing, as a main agent, water solution or mixed solution of water and alcohol including at least one of one or more kinds of metal alkoxide and a hydrolyzate thereof, and water-soluble polymer.

Description

  The present invention relates to a label. In particular, the present invention relates to a label used by being bonded to a metal can.

  Conventionally, printing of the product name and the like on the body of the metal can has been performed directly on the body, but printing with a cosmetic appearance cannot be performed due to the roughness of the metal surface of the body. Or since it cannot respond to a small lot, it has come to perform printing display by adhering a separately printed label to the barrel of a metal can.

  There are labels that adhere to such metal cans and have a metallic luster in order to enhance cosmetics. When such a metallic luster is required for a label, a metal vapor deposition film is generally used.

  For example, there is a label on which a printed name such as a trade name or a pattern is printed on the surface of a synthetic resin to which a metal vapor-deposited layer is applied (Patent Document 1). In addition, there is a label in which a product name, a design or the like is printed on the surface of the synthetic resin, and a metal vapor deposition layer is provided on the printed display surface.

  As the metal used for the metal deposition layer, aluminum is generally used, which provides a high glossy metallic luster, but this aluminum deposition layer is likely to be whitened by oxidation, and canning is considered on the premise of long-term storage. This can cause problems.

  On the other hand, there is a label in which a vapor deposition film provided with a metal vapor deposition layer and a film provided with a printing ink layer are laminated with the metal vapor deposition layer and the printing ink layer facing each other (Patent Document 2).

  In the case of this label, since the metal vapor deposition layer is sandwiched between the vapor deposition base film and the printing film, even if the metal vapor deposition layer is an aluminum vapor deposition layer, it can be prevented from being oxidized and whitened.

  In this way, the two films are generally bonded together by dry lamination, but it was completed due to the thermal history of each film and the difference in tension (tensile tension) at the time of bonding. In many cases, the label is curled (not flat but curved). The curled label causes trouble in the supply device that supplies the sheet one by one to the bonding device, and cannot be bonded.

  Known documents are shown below.

Japanese Utility Model Publication No. 6-67312 JP 2008-155965 A

  This invention is made | formed in view of the above situations, and makes it a subject to provide the label which metal gloss does not deteriorate and curl does not occur.

This invention is made in view of the subject which concerns, The invention of Claim 1 is a label adhere | attached on a metal can,
A transparent inorganic oxide vapor deposition layer is provided on a substrate layer made of a transparent plastic film, a protective layer is provided on the surface of the transparent inorganic oxide vapor deposition layer, a printing ink layer is provided on the surface of the protective layer, and a vapor deposition anchor It is a label characterized by sequentially providing a layer, an aluminum vapor deposition layer, and an adhesive layer for bonding to the metal can.

  The invention according to claim 2 of the present invention is the label according to claim 1, wherein the transparent inorganic oxide deposition layer is an aluminum oxide deposition layer or a silicon oxide deposition layer.

  According to a third aspect of the present invention, the protective layer is an aqueous solution containing at least one of one or more metal alkoxides or a hydrolyzate thereof and a water-soluble polymer, or a mixed solution of water and alcohol. The label according to claim 1 or 2, wherein the label is formed by applying a coating agent containing a main component and heating and drying.

  The invention according to claim 4 of the present invention is the label according to any one of claims 1 to 3, wherein the printing ink layer is provided with urethane printing ink.

  The invention according to claim 5 of the present invention is the label according to any one of claims 1 to 4, wherein the vapor deposition anchor layer is made of a urethane-modified copolymer polyester resin.

  The label of the present invention is oxidized because the aluminum vapor deposition layer having a metallic luster, high cosmetics, and easy whitening is sandwiched between the transparent inorganic oxide vapor deposition layer having a high oxygen barrier property and the metal of the metal can. The metallic luster does not deteriorate even when stored for a long time. In addition, since only one film is used, curling does not occur in manufacturing, and no trouble occurs in the process of bonding to a metal can.

It is explanatory drawing which showed typically an example of the label of this invention in the cross section.

Hereinafter, embodiments for carrying out the present invention will be described.
FIG. 1 is an explanatory view schematically showing a cross section of an example of the label of the present invention.

  As shown in the cross-sectional view of FIG. 1, the label 100 of this example has a transparent inorganic oxide vapor deposition layer 2, a protective layer 3, a printing ink layer 4, a vapor deposition anchor layer 5, and an aluminum vapor deposition layer on one side of the base material layer 1. 6. It consists of the laminated body which provided the adhesive bond layer 7 one by one.

  The base material layer 1 is made of a transparent plastic film, and a biaxially stretched film such as polyethylene terephthalate, nylon, or polypropylene is used. In particular, from the viewpoint of heat resistance and mechanical strength, a biaxially stretched film of polyethylene terephthalate is preferably used. The thickness of the base material layer 1 is preferably 7 to 25 μm.

  The transparent inorganic oxide vapor deposition layer 2 is a layer provided on the base material layer 1 by vapor deposition, and is a transparent layer formed by vapor depositing an inorganic oxide. As the inorganic oxide to be deposited, aluminum oxide and silicon oxide are preferably used from the viewpoint of transparency of the deposited film and gas barrier properties.

As for the thickness of the transparent inorganic oxide vapor deposition layer 2, 5-300 nm is preferable. If the thickness is less than 5 nm, there is a problem in the continuity of the thin film, and if it exceeds 300 nm, cracks are likely to occur and flexibility is lowered.

  The vapor deposition method is not particularly limited, but the vacuum vapor deposition method is preferably used because it can be performed at high speed and the cost is low. As a means for heating the evaporation source material in the vacuum evaporation apparatus, an electron beam heating method, a resistance heating method, an induction heating method, or the like is preferable.

  Further, in order to improve the adhesion to the base material layer, it is possible to use a plasma assist method or an ion beam assist method. Furthermore, in order to increase the transparency of the deposited thin film layer, it is possible to carry out reactive deposition in which oxygen gas or the like is blown during deposition.

  The protective layer 3 is a layer that is provided to protect the transparent inorganic oxide vapor deposition layer 2 and at the same time to further enhance the gas barrier property, and is provided on the surface of the transparent inorganic oxide vapor deposition layer 2 by coating. The thickness of the protective layer 3 is provided in the range of 0.01 to 50 μm. If it is too thick, cracks are likely to occur, and if it is too thin, the entire surface of the transparent inorganic oxide vapor-deposited layer 2 cannot be covered, and there is a possibility that a defective portion is generated.

  As the coating agent, an aqueous solution containing at least one of at least one metal alkoxide or a hydrolyzate thereof and a water-soluble polymer or a mixed solution of water and alcohol is preferably used.

  A coating agent can be prepared by adding a catalyst to a metal alkoxide in water or a mixture of water and alcohol and mixing with a water-soluble polymer while hydrolyzing the catalyst. As the metal alkoxide, tetraethoxysilane, triisopropoxyaluminum, or the like is used. In particular, tetraethoxysilane is preferably used.

  Examples of the water-soluble polymer include polyvinyl alcohol, polyvinyl pyrrolidone, starch, methyl cellulose, carboxymethyl cellulose, and sodium alginate. In particular, polyvinyl alcohol is preferably used.

  The printing ink layer 4 is a layer that performs print display of a product name, a design, and the like. The ink used for the printing ink layer 4 is preferably a urethane printing ink from the viewpoint of heat resistance and adhesion. The printing method is not particularly limited, but gravure printing is preferably used.

  In addition, the part which does not give printing ink, and the part using transparent ink are provided, and the glossiness of the aluminum vapor deposition layer in a lower layer is visible. As a result, a glossy label can be obtained.

  The vapor deposition anchor layer 5 is for increasing the adhesion of the aluminum vapor deposition layer 6. For the vapor deposition anchor layer 5, a urethane-modified copolymer polyester resin can be used as an anchor coating agent.

  By using the urethane-modified copolymer polyester resin, not only the adhesion of the aluminum vapor deposition layer 6 is enhanced, but also it has heat resistance and water resistance, and therefore has an effect of preventing whitening of the aluminum vapor deposition layer 6. As the urethane-modified copolymer polyester resin, for example, Byron (registered trademark) of Toyobo Co., Ltd. can be used.

The aluminum vapor deposition layer 6 is a layer provided on the surface of the vapor deposition anchor layer 5 by vapor-depositing aluminum, and gives a metallic luster to the label. In order to give metallic luster, the thickness of the aluminum vapor deposition layer 6 is preferably 10 nm or more. The vapor deposition method is not particularly limited, but the vacuum vapor deposition method is preferably used because it can be performed at high speed and the cost is low.

  The adhesive layer 7 is a layer for bonding to a metal can. As the adhesive, a commonly used adhesive can be used. In particular, a polyester-based heat bonding adhesive is preferably used. Using such an adhesive, the label can be bonded by thermocompression bonding while being wound around the body of the metal can.

  Hereinafter, the manufacturing method of the label 100 of this example is demonstrated.

  First, a transparent plastic film to be the base material layer 1 is prepared, and an inorganic oxide such as aluminum oxide or silicon oxide is vapor-deposited on one surface by a vacuum vapor deposition method to provide a transparent inorganic oxide vapor deposition layer 2.

  Separately, a coating agent used for the protective layer 3 is prepared. A coating agent is prepared by mixing a solution obtained by dissolving a water-soluble polymer and tin chloride in an aqueous solvent (water or a mixture of water and alcohol) with a metal alkoxide directly or hydrolyzed beforehand. .

  The protective agent 3 is provided by applying and drying the coating agent on the surface of the transparent inorganic oxide vapor deposition layer 2 provided by vapor deposition on the base material layer 1. Conventionally known means such as a dipping method, a roll coating method, a screen printing method, and a spray method are used for the coating method of the coating agent.

  Next, the printing ink layer 4 which displays a brand name, a design, etc. is provided on the surface of the protective layer 3. The printing method is not particularly limited, but gravure printing is preferably used because it is a long film based on plastic. In addition, urethane-based printing ink is preferably used from the viewpoint of heat resistance and adhesion.

  Further, a vapor deposition anchor layer 5 is applied and dried on the surface of the printing ink layer 4. The coating method can be provided by a dipping method, a roll coating method, a screen printing method, a spray method, or the like, but can also be provided by gravure coating simultaneously with a printing unit after the printing ink layer 4 of the printing press is provided.

  And aluminum is vapor-deposited on the surface of this vapor deposition anchor layer 5 by a vacuum vapor deposition method etc., and the aluminum vapor deposition layer 6 is provided. The aluminum vapor deposition layer 6 gives the label a metallic luster.

  An adhesive for adhering to the metal can is applied to the surface of the aluminum vapor deposition layer 6 to provide the adhesive layer 7. Thereby, winding of the label 100 of this example is manufactured.

  From the winding of the label 100, it is cut or punched to form one label 100, which is heated and pressed to a metal can and bonded. As a result, the label adhered to the metal can is oxidized without being in contact with oxygen because the aluminum deposition layer 6 is sandwiched between the transparent inorganic oxide deposition layer 2 and the protective layer 3 and the metal can. There is no whitening.

  Note that the adhesive layer 7 may be provided when adhering to a metal can without providing the adhesive layer 7 in a long winding state. In this case, when the aluminum vapor deposition layer 6 is exposed, it is oxidized rapidly, so that a protective varnish is applied to the surface of the aluminum vapor deposition layer 6.

As described above, the label of the present invention has a metallic luster due to the aluminum vapor-deposited layer 6 and a high cosmetic quality. And when bonded to a metal can, the aluminum vapor deposition layer, which is likely to be whitened, is sandwiched between the transparent inorganic oxide vapor deposition layer and the protective layer having a high oxygen barrier property and the metal of the metal can, so that it is not oxidized for a long time. The metallic luster does not deteriorate even when stored in Moreover, since only one film is used and it is not bonded, curling does not occur in manufacturing, and no trouble occurs in the process of bonding to a metal can.

DESCRIPTION OF SYMBOLS 100 ... Label 1 ... Base material layer 2 ... Transparent inorganic oxide vapor deposition layer 3 ... Protective layer 4 ... Printing ink layer 5 ... Deposition anchor layer 6 ... Aluminum vapor deposition layer 7 ... Adhesive layer

Claims (5)

A label that adheres to a metal can,
A transparent inorganic oxide vapor deposition layer is provided on a substrate layer made of a transparent plastic film, a protective layer is provided on the surface of the transparent inorganic oxide vapor deposition layer, a printing ink layer is provided on the surface of the protective layer, and a vapor deposition anchor A label comprising an aluminum layer, an aluminum deposition layer, and an adhesive layer for adhering to the metal can.   The label according to claim 1, wherein the transparent inorganic oxide vapor deposition layer is an aluminum oxide vapor deposition layer or a silicon oxide vapor deposition layer.   The protective layer is coated with an aqueous solution containing at least one of at least one metal alkoxide or a hydrolyzate thereof and a water-soluble polymer, or a mixed agent of water and alcohol. The label according to claim 1, wherein the label is heated and dried.   The label according to any one of claims 1 to 3, wherein the printing ink layer is provided by urethane printing ink.   The label according to any one of claims 1 to 4, wherein the vapor deposition anchor layer is made of a urethane-modified copolymer polyester resin.

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