JPH1158925A - Coating method for decorating and printing surface of floor material made of synthetic resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the title method unnecessary for work for adjusting ink density. SOLUTION: A coating method for decorating and printing surface of floor material made of a synthetic resin is constituted of a the step (1) of applying substrate treatment to the surface of the floor material made of the synthetic resin, the step (2) applying undercoat to the surface to which substrate treatment is applied, the step (3) of printing a pattern on the undercoat applied surface and the step (4) of further applying topcoat to the printed surface. Pigment 25 having a hue same to that of pigment used in ink 21 is quantitatively dripped in the storage tank 2 of the ink 21 used in the printed process (3).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for applying decorative surface printing on synthetic resin flooring.

[0002]

2. Description of the Related Art Conventionally, it has been generally practiced to print a grain or stone pattern on the surface of a synthetic resin flooring material such as a vinyl chloride resin to improve the appearance. In this case, a gravure printing method is well known for printing.

However, in normal gravure printing, printing is performed while cleaning the surface of a printing roll with a solvent. However, when printing with inks having different color tones is performed,
Part of the surface of the previously printed ink is dissolved by the action of the solvent, the previously printed ink is mixed with the ink supplied while circulating, and the color of the ink tends to gradually change, For this reason, there is a problem that it is necessary to periodically adjust the density of the ink, which requires man-hours.

[0004]

SUMMARY OF THE INVENTION The object of the present invention has been made in view of the above-mentioned circumstances, and provides a method of applying a decorative resin surface to a floor material made of synthetic resin which does not require an operation of adjusting the ink density. Is to do.

[0005]

According to the present invention, there is provided a method for applying decorative surface printing on a synthetic resin floor material, comprising: (1) a step of subjecting a surface of the synthetic resin floor material to a base treatment; A step of applying an undercoat to the treated surface; (3) a step of printing a pattern with ink on the undercoated surface; and (4) a further overcoat on the printed surface. In the method for applying decorative surface coating of synthetic resin flooring comprising the step of applying, a pigment having the same color tone as the pigment used in the ink is continuously introduced into a storage tank of the ink used in the printing step (3). It is characterized in that it is instilled selectively.

Examples of the synthetic resin flooring material used in the present invention include a vinyl chloride resin deck material.

The step of applying the undercoating treatment of the above (1) of the present invention is not particularly limited as long as it is a step capable of removing a lubricant or the like adhering to the surface when a synthetic resin flooring is molded. Although not a thing, for example, when the synthetic resin flooring is made of vinyl chloride resin, treatment with an organic solvent is preferable, and after applying the organic solvent to the surface of the flooring with a roll or the like, the solvent is wiped off, Next, a step of drying is preferable.

In the step (2) of applying the undercoat, the whole surface is applied to the surface of the floor material which has been subjected to the above-mentioned undercoating and dried by using a desired color paint or ink. As a coating method used in this step, any conventionally known coating method for a synthetic resin product is applicable, and is not particularly limited. For example, roll coating or gravure printing coating is preferable.

In the step (3) of printing the pattern, the pattern is printed on the surface of the floor material which has been subjected to the undercoating and dried by using ink of a desired color. As a printing method used in this step, any conventionally known printing method for synthetic resin products can be applied, and is not particularly limited. For example, gravure printing or the like is preferable.

In order to give a sense of depth to the decorative pattern on the surface of the obtained product, the pattern printing step involves changing the pattern of the pattern and performing printing repeatedly a plurality of times using inks having different color tones. preferable.

In the gravure printing, in order to maintain the clarity and reproducibility of the pattern to be printed, the gravure printing is usually performed while washing the printing roll of the gravure printing apparatus with an organic solvent or the like. The ink is usually used in a circulating manner. In order to prevent the solvent from being mixed with the ink and lowering the ink concentration, in the present invention, the pigment having the same color tone as the pigment used in the ink is placed in the ink storage tank. Is provided.

As the pigment to be instilled from the pigment infusion device, it is preferable to use a pigment having the same composition as the printing ink and a high pigment concentration.

In the step (4) of applying the top coat, the pattern is printed and dried on the floor material surface, usually using a transparent coating agent. The coating method used in this step is the same as the step (1). Further, as the transparent coating agent, an acrylic coating agent is preferable in terms of protection properties, weather resistance, price, and the like of the decorative printed pattern.

(Function) The method for coating and decorating the surface of a synthetic resin flooring material according to the present invention comprises (1) a step of subjecting the surface of the synthetic resin flooring material to a base treatment, and (2) applying the base treatment. (3) a step of printing a pattern with ink on the undercoated surface, and (4) a further overcoating on the printed surface. In the method for applying decorative surface printing on a synthetic resin floor material, the method comprises the steps of: (1) continuously instilling a pigment having the same color tone as the pigment used in the ink into a storage tank of the ink used in the printing step (3) This method eliminates the need for adjusting the ink density, and makes it possible to perform surface decoration printing with high reproducibility in a stable manner.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic explanatory view showing an example of a step of printing the pattern of the above (3) of the present invention, and FIG. 2 is a synthetic resin coated with a surface decorative print obtained by the present invention. It is a typical sectional view showing an example of a flooring material.

In FIG. 1, a deck material 5 made of vinyl chloride resin (hereinafter abbreviated as a floor material) is supplied to a gravure printing apparatus 1 with its surface facing upward. The floor material 5 has already been rolled with ethyl acetate as a base treatment and then wiped off and then dried. Further, as a base coat, a gray-colored paint is applied and dried, followed by drying. A layer having a thickness of 4 μm was used as a later coating film thickness.

The gravure printing apparatus 1 includes an ink supply roll 11, a print roll 12, and a backup roll 13, and the ink supply roll 11 and the print roll 12 are provided with doctor blades 14, 15, respectively. Ink 2 stored in ink tank 2 (capacity, 40 liters)
1 (purple-toned) is a trechoid pump 22
Is supplied to the ink supply roll 11 through the supply pipe A. Printing roll 1 in contact with ink supply roll 11
2 is engraved on the surface of the floor material 5 to give a spot-like pattern to the printed matter.
Was printed so as to form a layer having a thickness of 2 μm on the surface of the film after drying.

A solvent 31 is supplied from a solvent storage tank 3 through a supply pipe C to a valley formed by the printing roll 12 and a backup roll 13 in contact with the printing roll 12, and the engraved surface of the printing roll 12 is cleaned by the solvent 31. Have been. Solvent 3
Numeral 1 is returned to the solvent storage tank 3 via the recovery pipe D and used for circulation.

The ink 21 returns to the ink storage tank 2 via the recovery pipe B and is used for circulation. The ink storage tank 2 is provided with a stirrer 23 and a pigment drip unit 24 (capacity, 2 liters) for preventing the sedimentation of the pigment in the ink 21.
In the pigment infusion device 24, an ink 25 (referred to as a pigment for convenience) having the same composition as the ink 21 but having a higher concentration of the violet pigment contained therein is stored, and the ink 21 is diluted with a solvent 31. In consideration of the degree, the ink 21 was instilled at a rate of 120 cc per hour (0.2 cc per drop at 6-second intervals). The pigment infusion device 24 is also provided with a stirrer 26.

The floor material 5 in which a purple spot-like pattern is printed on the gray undercoat film by the above steps.
Was passed through the same process (not shown) as in FIG. 1 except that the color of the ink was black and the spot pattern of the printing roll was Printing was performed so that a layer having a black spot pattern of 2 μm was formed.

Next, an acrylic transparent coating agent was applied as a top coat by roll coating on the black spot pattern layer, and dried to obtain a 7 μm thick coat.

FIG. 2 shows a schematic sectional view of the product thus obtained. On the surface of the vinyl chloride resin deck material 60,
A gray undercoat layer 61, a purple spot pattern pattern layer 62, a black spot pattern pattern layer 63, and a transparent top coating layer 64 are laminated, and when viewed from above, it has a deep grain pattern.

According to the present invention, the method of applying the decorative decorative surface coating method for a synthetic resin flooring material according to the present invention is as described above. Surface decoration printing application becomes possible.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing an example of a step of printing a pattern according to the above (3) of the present invention.

FIG. 2 is a schematic sectional view showing an example of a synthetic resin flooring obtained by the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gravure printing apparatus 11, 12, 13 Roll 14, 15 Doctor blade 2 Ink storage tank 21 Ink 25 Pigment 23, 26 Stirrer 24 Pigment drip apparatus 3 Solvent storage tank 31 Solvent 5 Undercoated floor material 60 Synthetic resin floor material 61 Undercoat layer 62, 63 Pattern pattern layer 64 Overcoat layer

Claims (1)

[Claims] (1) a step of subjecting a surface of a synthetic resin floor material to a base treatment; (2) a step of applying an undercoat to the surface subjected to the base treatment; and (3) a step of applying the undercoat. Process of printing a pattern with ink on the surface,
(4) In the method for applying a decorative coating on a surface of a synthetic resin flooring, the method further comprising a step of applying a top coat on the surface on which the printing has been performed. A method for applying decorative paint on a surface of a synthetic resin flooring, wherein a pigment having the same color tone as the pigment used in the ink is continuously dropped.