JP2017024174A - Method for printing on steel material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for printing on a steel material that allows appropriate printing even if the steel material is wet, the steel material is rusted or uneven, or the steel material has a curved surface.SOLUTION: A method for printing on a steel material includes: an ink layer laminating process configured to laminate, on a surface of a sticking film 2 having water-soluble or water-swellable properties, an ink layer 11 containing a coloring material to form a sticking film with an ink layer; a water application process configured to apply water on a surface of the sticking film with an ink layer and/or a surface of a steel material 30; and a printing process configured to stick the sticking film with an ink layer after water application onto the steel material 30.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a printing method on a steel material mainly used outdoors.

  Conventionally, a material, a dimension, etc. are printed on steel materials. This printing includes, for example, a method using a metal seal or a method of writing on a steel material using chalk, white ink, or the like. However, it is not always easy to apply it when it is wet or when plating or the like is processed.

  For example, a printing method on a steel material capable of performing high-quality printing by inkjet on the surface of a wet steel material is disclosed (Patent Document 1). The method for printing on steel materials described in Patent Document 1 can prevent ink bleeding due to remaining cutting fluid by blowing air in the direction opposite to the printing direction.

  Also, as a printing method with excellent adhesion strength to the plated steel material, a printing method on the steel material in which an adhesive made of a resin that is cured by light energy is applied and the resin is cured to form an ink layer via the adhesive layer Is disclosed (Patent Document 2). The method for printing on a steel material described in Patent Document 2 can increase the adhesive strength of the ink layer through an adhesive layer made of a resin that is cured by light energy.

JP 11-138770 A JP-A-11-198516

  Among printing on steel materials, for example, when printing on steel materials such as outdoor buildings, a printing method capable of printing in a rainy environment, that is, in an environment wet with water, is required. Moreover, rust etc. may adhere to steel materials by being exposed to an outdoor environment, but it is required to be a printing method capable of printing even on steel materials to which such rust etc. have adhered. In the conventional method for printing on steel materials, there are printing methods that can be used when wet with water, but when steel materials have rust or irregularities, they are always preferably used when the steel material has a curved shape. It was something that could not be done.

  The present invention is a method for printing on a steel material for solving the above-described problems, and the purpose thereof is when the steel material is wet, when the steel material has rust or unevenness, and when the steel material has a curved shape. Even if it exists, it is providing the printing method to the steel material which can be printed suitably.

  As a result of intensive studies to solve this problem, the present inventor uses an adhesive film having water solubility or water swellability, and laminates an ink layer and a steel material through the water solubility or water swellability film. Thus, the present inventors have found that the above problems can be solved and have come to the present invention.

  (1) An ink layer laminating step of laminating an ink layer containing a color material on the surface of a water-soluble or water-swellable adhesive film to form an adhesive film with an ink layer; A method for printing on a steel material, comprising: a water application step of applying water to the surface of the film and / or the surface of the steel material; and a printing step of attaching the adhesive film with an ink layer after the water application step to the steel material.

  (2) In the ink layer lamination step, by transferring the ink layer onto the surface of the adhesive film from a transfer film in which the ink layer is laminated on one surface of the base resin layer via a release layer The printing method as described in (1) which laminates | stacks and forms the said adhesive film with an ink layer.

  (3) The printing method according to (2), wherein a receiving layer made of a hydrophobic material is laminated on the laminated film side of the transfer film on the adhesive film in the ink layer lamination step.

  (4) The printing method according to (2), wherein an adhesive layer made of a water-soluble material is laminated on the laminated surface side of the adhesive film on the transfer film in the ink layer lamination step.

  The printing method of the present invention is a printing method on a steel material that can be suitably printed even when the steel material has rust or unevenness, even when the steel material has a curved surface.

It is the schematic diagram showing the transfer sheet and sticking sheet of the ink layer lamination process which concern on 1st embodiment of this invention. It is the schematic diagram showing the transfer sheet and sticking sheet of the ink layer lamination process which concern on 2nd embodiment of this invention. It is the schematic diagram showing the sticking sheet of the ink layer lamination process which concerns on 3rd embodiment of this invention. It is the schematic diagram showing the printing apparatus to the steel materials which concern on this invention. It is the schematic diagram which represented each process of the printing method to this invention steel material typically.

  Hereinafter, each embodiment of the printing method to the steel material of this invention is described. The present invention is not limited to the following embodiments, and can be implemented with appropriate modifications within the scope of the object of the present invention.

<Printing method on steel>
The method for printing on a steel material of the present embodiment includes an ink layer laminating step in which an ink layer is laminated on the surface of the adhesive film 2 to form an adhesive film with an ink layer, and the surface of the adhesive film with an ink layer and / or a steel material. It is a printing method to a steel material including a water application step of applying water to the surface of 30 and a printing step of applying an ink layer-attached film after the water application step to the steel material 30 (see FIG. 5). Hereinafter, each step will be described.

[Ink layer lamination process]
The ink layer laminating step relating to the present embodiment is a step of laminating the ink layer 11 containing a coloring material on the surface of the water-soluble or water-swellable adhesive film 2 to form an ink layer-attached film. is there.

  Examples of the water-soluble or water-swellable adhesive film 2 include the adhesive film 2 made of a laminate including the water-soluble or water-swellable film 21. The water-soluble or water-swellable film 21 is a film that dissolves in water or a film that swells with water. By using the water-soluble or water-swellable film 21, the ink layer 11 can be laminated on the steel material 30 as described later. The water-soluble or water-swellable film 21 is, for example, a polyvinyl alcohol film, a starch film, a film made of a mixture of polyvinyl alcohol and starch, or a liquid permeable material such as paper, nonwoven fabric, or various porous films. A film coated on a substrate having a certain thickness and a laminated film can be mentioned.

  The film thickness of the water-soluble or water-swellable film 21 is not particularly limited, but is preferably 10 μm or more and 200 μm or less, and more preferably 30 μm or more and 100 μm or less. Adhesiveness with the steel material 30 can be improved because it is 10 micrometers or more. By being 200 micrometers or less, it can be set as the adhesive film 2 with low cost and high productivity.

  In addition, the adhesive film 2 having water solubility or water swellability is a concept including a single film of the water solubility or water swellable film 21 and, as in the embodiment described later, a water soluble or water swellable film. 21 is a concept including a laminated body in which another layer such as the receiving layer 22 is further laminated on 21.

  The ink layer 11 is a layer containing a color material. The method for printing on steel of the present invention enables printing on the steel 30 by laminating the ink layer 11 on the steel 30 via the water-soluble or water-swellable film 21. The ink that can form the ink layer 11 is not particularly limited, and can be appropriately selected by a method of laminating the ink layer 11 described later. For example, known additives such as plasticizers, stabilizers, waxes, greases, desiccants and the like may be optionally added to conventionally known inks. Moreover, you may contain the pigment etc. which reflect light so that the confirmation of printing may become easy at night as needed.

  The printing method to the steel material of this embodiment laminates steel material and an ink layer by apply | coating water so that it may mention later. Therefore, the ink layer 11 is preferably a layer that does not dissolve in water. Moreover, it is preferable to use a pigment as the color material contained in the ink layer.

  The method for laminating the ink layer 11 on the surface of the adhesive film 2 is not particularly limited. For example, thermal transfer, spray coating, gravure printing, screen printing, ink jet method and the like can be mentioned. Lamination by transfer is preferred from the standpoint that the printing desired by the user can be varied. Further, in the case of an application in which a predetermined printing pattern is printed at a high speed, it is preferable to use gravure printing other than thermal transfer as described later. Hereinafter, each embodiment of the ink layer lamination process according to the present invention will be described. In addition, this invention is not limited to the following embodiment at all.

(First embodiment)
The ink layer lamination process regarding this embodiment is demonstrated using FIG. The ink layer laminating step shown in FIG. 1 shows a step of laminating the ink layer 11 on the surface of the adhesive film 2 using the transfer film 1 by thermal transfer. The transfer film 1 is a film in which an ink layer 11 is laminated on one surface of a base resin layer 13 via a release layer 12. Although not essential in the present invention, the transfer film 1 in FIG. 1 includes a heat-resistant layer 14 on the other surface of the base resin layer 13. The heat-resistant layer 14 may be a layer having a function as a friction-resistant layer or an antistatic layer as necessary.

  The release layer 12 is a layer that allows the ink layer 11 to be peeled off, and may be a layer formed of a release varnish containing a thermoplastic resin.

  On the other hand, the adhesive film 2 is a laminate in which a receiving layer 22 made of a hydrophobic material is laminated on the surface of a water-soluble or water-swellable film 21. Since the printing body which is the steel material 30 on which the ink layer and the water-soluble or water-swellable film 21 are laminated is protected by the receiving layer made of a hydrophobic material, it can be made a highly durable printing body. . Moreover, the receiving layer 22 will not be specifically limited if it is a layer which has said performance, For example, a nitrocellulose, a vinyl chloride-vinyl acetate copolymer, etc. can be mentioned.

  In the ink layer lamination step according to the present embodiment, the ink layer 11 of the transfer film 1 is laminated on the surface of the adhesive film 2 by thermal transfer to form an adhesive film with an ink layer. Thermal transfer means that the ink layer 11 is transferred onto the surface of the adhesive film 2 by heating the ink layer 11 of the transfer sheet 1. The thermal transfer relating to the present embodiment is performed by, for example, laminating at a temperature of about 80 ° C. to 200 ° C. by laminating the transfer film 1 so that the surface of the transfer layer 1 on the ink layer 11 lamination side and the receiving layer 22 of the adhesive film 2 are in contact. The layer can be transferred.

  If it is the printing method to steel materials including the ink layer lamination process regarding this embodiment shown in FIG. 1, the water-soluble or water-swellable film 21 can be protected by the receiving layer 22 made of a hydrophobic material. A highly durable printed body that can be used even in an environment can be obtained.

(Second embodiment)
The ink layer lamination process regarding this embodiment is demonstrated using FIG. In the ink layer laminating step shown in FIG. 2, the transfer film 1 is a film in which an adhesive layer made of a water-soluble material is further laminated on the ink layer 11. Since the adhesive layer made of a water-soluble material is laminated, it can be easily peeled off with water. For this reason, the durability in a rainy environment is inferior to the embodiment of FIG. 1, but when it is desired to erase the printing from the printed material, it can be easily erased by applying water. In that case, the printing method on the steel material 30 of this embodiment is extremely useful.

  As the pressure-sensitive adhesive capable of forming the adhesive layer, a conventionally known aqueous emulsion paste that can be easily formed by coating can be used and is not particularly limited.

  In addition, the ink layer 11, the peeling layer 12, the base resin layer 13, and the heat-resistant layer 14 of the transfer film 1 of FIG. 2 are the same as those of the transfer film 1 of FIG. Further, the water-soluble or water-swellable film 21 of the adhesive film 2 in FIG. 2 is the same as the adhesive film 2 in FIG.

(Third embodiment)
The ink layer lamination process regarding this embodiment is demonstrated using FIG. In the ink layer lamination step shown in FIG. 3, the printing layer 23 is laminated on the surface of the adhesive film 2 without using the transfer film 1. Unlike the ink layer laminating process shown in FIGS. 1 and 2, the ink layer is not laminated on the surface of the adhesive film by transfer, and therefore the printing that the user wants to use cannot be varied. However, since it can be used by laminating the ink layer on the adhesive film 2 in advance, the ink layer laminating step can be omitted during actual use. For this reason, it becomes possible to print on the steel material 30 only by a water application process and a printing process, which will be described later, and this embodiment is extremely useful for applications in which a fixed printing pattern is printed at high speed.

[Water application process]
The water application step relating to the present embodiment is a step of applying water to the surface of the adhesive film with an ink layer formed by the ink layer lamination step and / or the surface of the steel material 30. The method for applying water to the surface of the adhesive film with an ink layer and / or the surface of the steel material 30 is not particularly limited. For example, a method of applying by spraying, a method of applying by a water supply roll, and a synthetic material having water absorption properties such as a sponge. Examples thereof include a method in which the resin is applied in contact with the surface of the adhesive film with an ink layer and / or the surface of the steel material 30, and a method in which the adhesive film with an ink layer or / and the steel material 30 is directly immersed in water.

[Printing process]
The printing process regarding this embodiment is a process of affixing an adhesive film with an ink layer to the steel material. Water is applied to the surface of the adhesive film with the ink layer and / or the surface of the steel material 30 by the water application process, and a part of the adhesive film 2 having water solubility or water swellability is dissolved, so that water solubility or water It can laminate | stack through the adhesive film 2 which has swelling property.

  Although the steel material 30 is not specifically limited, For example, iron, copper, aluminum, stainless steel, zinc, lead, nickel, titanium, or these alloys etc. can be mentioned. Among them, the steel material 30 with rust and the steel material 30 with unevenness can follow the shape of the steel material 30 and be brought into close contact therewith. Therefore, it is particularly useful as a printing method for the steel material 30 having rust and the steel material having unevenness.

[Printing equipment for steel]
The schematic diagram showing the printing apparatus to the steel material which concerns on this invention is shown in FIG. The adhesive film 2 and the transfer film 1 are brought into close contact, and the ink layer 11 of the transfer film 1 is laminated on the surface of the adhesive film 2 by thermal transfer to form an adhesive film with an ink layer. Then, water is applied to the surface of the adhesive film with an ink layer by the water supply roll 4. Then, by pressing with the sealer 5, the adhesive film with an ink layer is brought into contact with the steel material 30, and the ink layer 11 is laminated on the steel material 30. By using the printing apparatus of FIG. 4, it is possible to realize the printing method on the steel material of the present invention.

  As described above, the printing method of the present invention can print on a steel material that enables printing on a steel material that can be suitably printed even when the steel material 30 has rust or unevenness, even when the steel material 30 has a curved surface. Is the method.

DESCRIPTION OF SYMBOLS 1 Transfer film 11 Ink layer 12 Release layer 13 Base resin layer 14 Heat-resistant layer 15 Adhesive layer 2 Adhesive film 21 Water-soluble or water-swellable film 22 Receptive layer 23 Print layer 30 Steel material 100 Printing device to steel material 201 Adhesive film supply Paper roller 202 Attached film discharge roller 3 Cutter 4 Water supply roll 5 Sealer

Claims (4)

An ink layer laminating step of laminating an ink layer containing a coloring material on the surface of a water-soluble or water-swelling adhesive film to form an adhesive film with an ink layer;
A water application step of applying water to the surface of the adhesive film with an ink layer and / or the surface of a steel material;
And a printing step of attaching the ink layer-attached film after the water application step to the steel material.   In the ink layer laminating step, the ink layer is laminated by transferring the ink layer on the surface of the adhesive film from the transfer film in which the ink layer is laminated on one surface of the base resin layer via a release layer. The printing method of Claim 1 which forms the said adhesive film with an ink layer.   The printing method according to claim 2, wherein a receiving layer made of a hydrophobic material is laminated on the laminated film side of the transfer film on the adhesive film in the ink layer lamination step.   The printing method according to claim 2, wherein an adhesive layer made of a water-soluble material is laminated on the laminated film side of the adhesive film on the transfer film in the ink layer lamination step.

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