JP4132481B2 - Highly transparent label and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
This invention relates to a label and a manufacturing method thereof, particularly to a label and a manufacturing method thereof for obtaining a highly transparent label.
[0002]
[Prior art]
FIG. 6 is a sectional view showing an example of a conventional label, and FIG. 7 is a sectional view showing a release paper used for the label. A conventional highly transparent label 1 includes a release paper 2 as shown in FIG. The release paper 2 includes a sheet-like base material 3. For example, a polyethylene layer 4 is formed on the substrate 3. In order to form the polyethylene layer 4, as shown in FIG. 8, a molten polyethylene 4 a is applied onto the base material 3, and a mirror-finished metal roller 5 is applied onto the polyethylene 4 a applied to the base material 3. And rolling. By doing so, the polyethylene layer 4 to which the mirror surface of the metal roller 5 is transferred is formed. Further, a release agent layer 6 is formed on the polyethylene layer 4. An adhesive layer 7 is formed on the release agent layer 6, and a label material 8 is formed on the adhesive layer 7 with a transparent film or the like.
[0003]
In this label 1, since the mirror-finished polyethylene layer 4 is formed, the surfaces of the release agent layer 6 and the pressure-sensitive adhesive layer 7 formed thereon are also mirror surfaces. If the polyethylene layer 4 is not present, irregularities are also formed on the surfaces of the release agent layer 6 and the pressure-sensitive adhesive layer 7 because of irregularities on the surface of the substrate 3. Therefore, when the label material 8 is peeled from the release paper 2, the transparency is impaired due to the unevenness of the surface of the pressure-sensitive adhesive layer 7. However, in this label 1, since the surface of the pressure-sensitive adhesive layer 7 is a mirror surface, high transparency can be obtained even if the label material 8 is peeled off and attached to an adherend.
[0004]
[Problems to be solved by the invention]
However, since polyethylene has low heat resistance, in order to transfer the mirror surface of the metal roller, it is necessary to set the metal roller to a low temperature state and perform rolling, resulting in poor production efficiency. In addition, polyethylene cannot be recycled and cannot meet the demand for resource protection.
[0005]
Therefore, a main object of the present invention is to provide a release paper that can be produced efficiently and obtain a highly transparent label and a label using the same, and to obtain such a release paper and label. It is to provide a manufacturing method that can.
[0006]
[Means for Solving the Problems]
The present invention is a highly transparent label comprising a step of forming a highly transparent pressure-sensitive adhesive layer on a release paper layer of a release paper, and a step of attaching a label material made of a transparent film on the pressure-sensitive adhesive layer. A process for preparing a sheet-like base material, a step of applying a paint containing a binder on the base material, and a step of closely attaching a film having a smooth surface to the surface of the paint And a transparent process characterized by comprising a step of solidifying a paint to form a film, a step of peeling a film having a smooth surface from the film, and a step of forming a release agent layer on the film. It is a manufacturing method of a highly reliable label .
The present invention also includes a step of preparing a label material made of a transparent film, a step of forming a highly transparent pressure-sensitive adhesive layer on one side of the label material, and a pressure-sensitive adhesive layer on the release agent layer of the release paper. A method for producing a highly transparent label, including a step of temporary attachment, in which a release paper prepares a sheet-like base material, a step of applying a paint containing a binder on the base material, Including a step of closely attaching a film having a smooth surface to the surface, a step of solidifying a paint to form a film, a step of peeling a film having a smooth surface from the film, and a step of forming a release agent layer on the film It is a manufacturing method of a highly transparent label characterized by being manufactured by a process.
In this method for producing a highly transparent label , polyvinyl alcohol or acrylic emulsion can be used as the coating material.
In addition, you may add a filler to a coating material as needed.
Moreover, a polyester film, a polyethylene film, a polypropylene film, etc. can be used as a film which has a smooth surface .
Moreover , this invention is a highly transparent label manufactured with the manufacturing method of one of the above highly transparent labels.
[0007]
A film having a smooth surface is brought into close contact with the surface of the paint applied on the substrate, and the film containing the binder is solidified to form a film, whereby the surface of the film becomes smooth. Therefore, the surface of the pressure-sensitive adhesive layer can be made smooth by forming the release agent layer on the film having a smooth surface and further forming the pressure-sensitive adhesive layer. Therefore, a highly transparent label can be obtained by using a highly transparent material for such an adhesive layer and forming a label material made of a transparent film thereon.
As a paint for forming such a film, for example, polyvinyl alcohol or acrylic emulsion can be used, and by using these materials, a film that can be reused and has a paper recyclability can be obtained. it can.
At this time, a filler may be added in order to improve the properties of the film obtained by solidifying the paint containing the binder .
Furthermore, as a film having a smooth surface, for example, a polyester film, a polyethylene film, a polypropylene film, or the like can be used.
Moreover, as a method of forming the pressure-sensitive adhesive layer and the label material on the release agent layer, the pressure-sensitive adhesive layer may be first formed and then the label material may be attached, or the pressure-sensitive adhesive after the pressure-sensitive adhesive is applied to the label material The surface may be temporarily attached onto the release agent layer.
[0008]
The above object, other objects, features, and advantages of the present invention will become more apparent from the following detailed description of embodiments of the present invention with reference to the drawings.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a cross-sectional view showing a release paper of the present invention. The release paper 10 includes a sheet-like base material 12. A film 14 is formed on the substrate 12. The surface of the film 14 is formed to be a smooth mirror surface. Further, a release agent layer 16 is formed on the film 14.
[0010]
In order to produce the release paper 10, first, a base material 12 is prepared as shown in FIG. Next, as shown in FIG. 2 (B), a coating material 18 such as polyvinyl alcohol or acrylic emulsion is applied onto the substrate 12. Further, as shown in FIG. 2C, a film 20 having a smooth surface such as a polyester film is brought into close contact with the paint 18. In this state, the film 14 is formed by drying the paint 18. In order to improve the properties of the film 14, for example, a filler such as calcium carbonate may be added to the paint 18. After the film 14 is formed, the film 20 is peeled as shown in FIG. Furthermore, a release agent layer 16 is formed on the film 14 by applying, for example, a silicon release agent, and the release paper 10 as shown in FIG. 1 is manufactured. In this release paper 10, the film 14 is formed by bringing a film 20 having a smooth surface into close contact with the paint 18 applied on the substrate 12, and therefore the surface of the film 14 is a mirror surface. Furthermore, since the release agent layer 16 is formed on such a film 14, the surface of the release agent layer 16 also becomes a mirror surface.
[0011]
As a material for the paint 18, a material in which fillers, lubricants, and crosslinking agents are added to the binder, and additives such as a dispersant, an antifoaming agent, a water resistant agent, and an ultraviolet absorber are added as necessary. It is done. Examples of the binder used here include polyvinyl alcohol, modified polyvinyl alcohol, starch, modified starch, casein, gelatin, glue, gum arabic, polyamide, polyacrylamide, modified polyacrylamide, hydroxyethyl cellulose, methyl cellulose, carboxymethyl cellulose. , Hydroxypropyl cellulose, polyvinyl acetate, polyacrylate, styrene-maleic anhydride copolymer, isobutylene-maleic anhydride copolymer, diisobutylene-maleic anhydride copolymer, vinyl acetate-maleic anhydride copolymer Polymer, Methyl vinyl-maleic anhydride copolymer, Isopropylene-maleic anhydride copolymer, Styrene-butadiene copolymer, Maleic acid copolymer, Polyvinyl chloride, Polyvinyl chloride , Vinyl chloride - vinyl acetate copolymer, polyurethane, polystyrene, polyvinyl pyrrolidone, acrylic acid esters, can be used to select acrylonitrile, more than one kind or two kinds of water-soluble resin or emulsion, such as methyl vinyl ether.
[0012]
As fillers, aluminum hydroxide, aluminum oxide, aluminum silicate, heavy calcium carbonate, light calcium carbonate, titanium oxide, barium sulfate, silica gel, activated clay, talc, clay, kaolinite, diatomaceous earth, white carbon, One type or two or more types such as magnesium carbonate, magnesium oxide, magnesium hydroxide, zinc oxide, polystyrene resin particles, urea-formalin resin particles, and polyolefin resin particles can be selected and used.
[0013]
Furthermore, as lubricants, fatty acids such as oleic acid, oxidized waxes such as paraffin wax, polyolefin waxes such as polyethylene wax, metal soaps such as zinc stearate, ester waxes such as carnauba wax, silicon oil, whale oil One kind or two or more kinds of oils such as can be selected and used.
Moreover, as a crosslinking agent, dialdehyde type such as glyoxal, polyaldehyde, amino-formaldehyde, polyamine type such as polyethyleneamine, polyimine type such as polyethyleneimine, epoxy type, polyamide resin, diglycidyl type such as glycerin diglycidyl ether, One type or two or more types of zirconium salts such as ammonium zirconium carbonate can be selected and used.
[0014]
Further, as the film 20, a polyethylene film, a polypropylene film, a polyamide (nylon) film, a polyester film, a polyethylene naphthalate film, a polystyrene film, a polyvinyl alcohol (vinylon) film, a polyether ketone film, a polysulfone film, a polyether sulfone film. , Polyetherimide film, Ethylene copolymer film such as EVA copolymer film and Ionomer film, Polycarbonate film, Cellophane film, Polyvinyl chloride film, Polyvinylidene chloride film, Aluminum foil, Acetate film, etc. A single film with a smooth surface or a paper or film with these films bonded can be used. That. Further, in order to improve the releasability with the film 14, a release agent may be applied to the surface to be bonded to the paint 18.
[0015]
FIG. 3 is a cross-sectional view showing a label using the release paper 10. The label 30 includes the release paper 10. An adhesive layer 22 is formed on the release agent layer 16 of the release paper 10. As the adhesive layer 22, a highly transparent material is used. Further, a label material 24 is stuck on the pressure-sensitive adhesive layer 22. As the label material 24, a transparent film or the like is used.
[0016]
In order to produce such a label 30, a release paper 10 is prepared as shown in FIG. Next, as shown in FIG. 4B, an adhesive is applied on the release agent layer 16 of the release paper 10 to form an adhesive layer 22. Furthermore, as shown in FIG. 4C, a label 30 as shown in FIG. 3 is produced by sticking a label material 24 on the pressure-sensitive adhesive layer 22.
[0017]
In this label 30, for example, printing is performed on the label material 24, and the label material 24 is peeled off from the release paper 10, and then attached to the adherend. At this time, the pressure-sensitive adhesive layer 22 is peeled off from the release agent layer 16, but since the release agent layer 16 is formed to be a mirror surface, the surface of the pressure-sensitive adhesive layer 22 is also a mirror surface. Therefore, there is no unevenness on the surface of the pressure-sensitive adhesive layer 22, and light scattering hardly occurs. In addition, since a highly transparent material is used as the material of the pressure-sensitive adhesive layer 22 and the label material 24, high transparency can be obtained when the label material 24 is attached to an adherend. In order to form the pressure-sensitive adhesive layer 22, as shown in FIG. 5, a pressure-sensitive adhesive is applied to the label material 24 to form the pressure-sensitive adhesive layer 22, and the pressure-sensitive adhesive layer 22 formed on the label material 24 is peeled off. You may stick on the agent layer 16.
[0018]
Polyvinyl alcohol, which is a material of the film 14 used for the label 30, has high heat resistance. Therefore, in this label 30, it is not necessary to apply a metal roller over a long period of time at a low temperature in order to make the base part forming the release agent layer a mirror surface, like a release paper having a conventional polyethylene layer formed thereon, The film 14 having a mirror surface can be easily formed by applying the paint 18 on the base material 12 and bringing the film 20 having a smooth surface into close contact and drying at a high temperature. Therefore, compared with the conventional label, a release paper and a label using the same can be manufactured. Polyethylene used in conventional release paper is difficult to recycle, but polyvinyl alcohol, which is the material of the film 14 used in the release paper 10 of the present invention, can be recycled and recycled. It is.
[0019]
【The invention's effect】
According to this invention, it is easy to produce a film having a mirror surface on a substrate, and a release paper can be easily produced. And by using such a release paper, since manufacture of a label becomes easy and also an adhesive layer for sticking a label material on a thing to be stuck serves as a mirror surface, a transparent adhesive and a label material are used. As a result, a highly transparent label can be obtained. Therefore, a release paper having a film having a mirror surface can be easily manufactured, whereby a highly transparent label can be easily manufactured. In addition, a recyclable material can be used as the material of the film used for the release paper.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an example of a release paper of the present invention.
FIG. 2 is an illustrative view showing a manufacturing process of the release paper shown in FIG. 1;
3 is a cross-sectional view showing an example of a label using the release paper shown in FIG. 1. FIG.
4 is an illustrative view showing one example of a manufacturing process of the label shown in FIG. 3; FIG.
FIG. 5 is an illustrative view showing another example of the manufacturing process of the label shown in FIG. 3;
FIG. 6 is a cross-sectional view showing an example of a conventional label.
7 is a cross-sectional view showing an example of release paper used for the conventional label shown in FIG.
FIG. 8 is an illustrative view showing one example of a method for producing a release paper used for a conventional label.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Release paper 12 Base material 14 Film | membrane 16 Release agent layer 18 Paint 20 Film 22 Adhesive layer 24 Label material 30 Label

Claims (6)

A method for producing a highly transparent label, comprising a step of forming a highly transparent pressure-sensitive adhesive layer on a release paper layer of a release paper, and a step of attaching a label material made of a transparent film on the pressure-sensitive adhesive layer The release paper includes a step of preparing a sheet-like base material, a step of applying a paint containing a binder on the base material, and a step of closely attaching a film having a smooth surface to the surface of the paint. forming a film by solidifying the coating material, the step for peeling the film having a smooth surface from said film, and is prepared by a process comprising the step of forming a release agent layer on the film, that A manufacturing method of a highly transparent label characterized . A step of preparing a label material made of a transparent film, a step of forming a highly transparent pressure-sensitive adhesive layer on one side of the label material, and a step of temporarily attaching the pressure-sensitive adhesive layer on the release agent layer of a release paper A process for preparing a highly transparent label, wherein the release paper prepares a sheet-like base material, a step of applying a paint containing a binder on the base material, and a surface of the paint A step of closely adhering a film having a smooth surface, a step of solidifying the paint to form a film, a step of peeling the film having a smooth surface from the film, and forming a release agent layer on the film A method for producing a highly transparent label , which is produced by a process including a process . As the coating material, polyvinyl alcohol or an acrylic emulsion is used, according to claim 1 or the method of manufacturing the labels more transparent according to claim 2, characterized in that. Method for producing a label having high transparency according to any one of claims 1 to 3 wherein the coating material filler is added, it is characterized. As a film having a smooth surface, a polyester film, polyethylene film or polypropylene film is used, the production method of the highly transparent label according to any one of claims 1 to claim 4, characterized in that. A highly transparent label produced by the method according to any one of claims 1 to 5 .

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