JPH0664146A - Printing method for continuous flooring material - Google Patents

Abstract

PURPOSE:To provide the method of eliminating the possible bleeding or mixing of colors and manufacturing a flooring material of high value of commodity by setting up a constitution of printing patterns of a plurality of colors on the surface of the flooring material at high speed and mixing inks of different colors when the inks of a plurality of colors are printed directly on the flooring material. CONSTITUTION:White ink is transferred from a gravure roll 62 to a printing roll 61 with rubber surface by a first offset out gravure printer 6 and printing is carried out on a continuous deck material 1 while the continuous deck material 1 of hard vinyl chloride is carried by a roller conveyor 2. On the other hand, hot water fiber of approximately 60 deg.C is fed from a water fiber feeding pipe 32, and while the surface of the deck material 1 is heated up to approximately 60 deg.C by the radiation heat of a heated heater 31, the printed deck material 1 is passed. Successively the deck material is transferred to a second offset gravure printer 7, and printing is carried out in ink of gray black color as a second color.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing method suitable for printing a pattern of a plurality of colors on a surface of a synthetic resin long floor material such as a synthetic resin deck material.

[0002]

2. Description of the Related Art A synthetic resin deck material such as a deck material having a plurality of colors on its surface is widely used. A method described in Japanese Patent Publication No. 2-33317 is known as one of methods for providing a pattern of a plurality of colors on the surface of such a floor material. In this method, the surface of the synthetic resin floor material melt-extruded from the die of the extruder, along with the surface of the synthetic resin floor material in the laminating die jig laminating film coated with an adhesive in advance It is to adhere.

As another method, a method of directly printing on the surface of a synthetic resin long floor material is also used. That is, by arranging a plurality of printing devices above the transporting device for the long floor material, while transporting the flooring material by the transporting device, a method of printing a plurality of colors one by one on the surface of the flooring material being transported, The ink printed on the floor material surface by the printing device is naturally dried before being conveyed to the printing device for printing the next color.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In a method of laminating a printed film as described in the above publication on the surface of a flooring material, after adhering the film to the flooring material, an adhesive or film is used during a long period of use. Has the drawback that it ages and discolors or peels off.

Further, in the method of printing a plurality of colors on the surface of the floor material, if the conveying speed is increased to increase the printing speed,
The next color is printed before the printed ink dries, and when the inks of different colors come into contact with each other, the colors are mixed with each other, causing bleeding or color mixing, which significantly impairs the decorative effect of the pattern.

The present invention has been made in order to solve the above-mentioned problems of the conventional method, and it is not necessary to use a laminating film, and it is possible to print a pattern of a plurality of colors on the surface of a floor material at a high speed. A printing method capable of producing a long floor material having a decorative effect and high commercial value without causing the inks of different colors to mix even if the inks of a plurality of colors are directly printed on the floor material. The purpose is to provide.

[0007]

According to the method of printing a flooring material of the present invention, when a long flooring material is conveyed and printed on the surface of the flooring material in a plurality of steps, printing is already performed at each step. The ink on the surface of the floor material is dried.

The floor material printed by the method of the present invention has a long printable surface such as an extruded product of a thermoplastic resin such as vinyl chloride resin, glass fiber reinforced synthetic resin, or wood. It is a thing.

In the present invention, as the printing means itself, conventionally known printing methods, that is, gravure printing, offset gravure printing, flexographic printing, screen printing and the like can be adopted.

Further, in the present invention, as the drying means,
A method of evaporating the ink solvent by heating, a method of promoting evaporation of the ink solvent by blowing air, a method of further promoting evaporation by sucking the evaporated solvent gas of the ink, a method of combining two or more of the above Can be used.

By the way, in the above method, that is, when the solvent of the ink is evaporated by heating, the printing ink often contains an organic solvent. Therefore, it is necessary to use an explosion-proof structure in order to avoid the risk of ignition. For example, there is a method in which heated steam is circulated in a pipe arranged close to the ink surface printed on the floor material, and the solvent is evaporated by the radiant heat of the heated pipe.

The above method, that is, a method of promoting the evaporation of the solvent of the ink by blowing air, for example, is directed to the printed ink surface and at a room temperature by a blower or a blower from a blowout port arranged close to the ink surface. There is a method of blowing warm air or hot air that uses both a heater and a heater to hit the ink surface.

As the above method, that is, the method of sucking the solvent gas of the evaporated ink, for example, the solvent gas of the evaporated ink is exhausted through an air intake duct which is arranged toward the printed ink surface and close to it. There is a method of sucking and exhausting with a pump.

When the above drying method is used,
The floor material receives the heat of the drying device to store the residual heat, and the ink printed at the end is naturally dried quickly by the residual heat, so that it is not necessary to provide a drying means. Even when the above drying method is used, the problem of bleeding due to mixing of inks of a plurality of colors and the problem of exhibiting mixed colors is avoided, and the purpose of printing quickly has been achieved. There is no need to dare to force the drying, as it allows sufficient time for natural drying before the process.

[0015]

In the method of the present invention, since the printing ink on the surface of the floor material that has already been printed is dried at each stage, it does not mix with the ink to be printed at the next stage, and the printing at each stage can be performed. Be clear.

[0016]

【Example】

(Example 1) An embodiment of a printing method for a long flooring material according to the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing an embodiment of a printing method for a long flooring material according to the present invention. In FIG. 1, 2
Is a roller conveyor for conveying the floor material 1 and moves in the direction of arrow A. Reference numeral 6 denotes a first offset gravure printing device arranged above the roller conveyor 2, and the printing device 6 is mainly supplied with print ink from an ink supply pipe 82 after the ink amount is adjusted by a doctor blade 64. A plate roll 62 rotating in the B direction, a rubber-made printing roll 61 for printing the ink of the plate roll 62 on the surface of the floor material 1 while rotating in contact with the plate roll 62, and the printing roll 6
A cleaning roll 63 for cleaning the ink No. 1 with a cleaning liquid composed of a solvent and scraping it off. A grid pattern is engraved on the surface of the plate roll 62. Reference numeral 83 is an ink supply pump.

Reference numeral 84 is an ink vat for collecting the ink scraped off by the doctor blade 64 from the plate roll 62 and collecting it in the ink tank 81 by the ink recovery pipe 85, and 94 is a cleaning liquid collecting the scraped cleaning liquid. It is a cleaning liquid vat which is recovered in the cleaning liquid tank 91 by a recovery pipe 95. 93 is a cleaning liquid supply pump.

Reference numeral 7 denotes a second offset gravure printing apparatus for printing another color, which has the same structure as the gravure printing apparatus 6 and has a plate roll 62 and a printing roll 6.
1. The cleaning roll 63. The printing device 7 is arranged above the roller conveyor 2 with a distance of about 70 cm from the first offset gravure printing device 6.

A drying device 3 is provided between the printing devices 6 and 7, and a steam supply pipe 32 is provided from a boiler (not shown).
The heated steam supplied by the
The heat of the steam sent to the heater 31 disposed at a distance of cm is radiated on the surface of the heater 31, and the steam recovery pipe 3
It is recovered to the boiler by 3. Reference numeral 34 is a cover for covering the upper surface and the side surface of the heater 31 to improve thermal efficiency.

Next, a printing method using the apparatus shown in FIG. 1 will be described. 40 m of long deck material 1 made of extruded hard vinyl chloride by roller conveyor 2
The first gravure printing device 6 while transporting at a speed of 1 / min.
White ink is supplied to the cells of the grid pattern formed on the gravure roll 62 of No. 6, and the ink is adjusted to a certain thickness by the doctor blade 64, and this ink is transferred to the surface of the printing roll 61 made of rubber surface. The first color of white was printed on the surface of the deck material 1.

On the other hand, heated steam of about 60 ° C. is sent from the steam supply pipe 32, and the surface of the deck material 1 is heated to about 60 ° C. by the radiant heat of the heated heater 31, while passing through the printed deck material 1 described above. When it was allowed to do so, the ink was almost completely dried.

Subsequently, the deck material 1 was conveyed to the second gravure printing device 7, and the second color, gray-black, was printed in the same manner as the first offset gravure printing device 6. At this time, since the ink of the first color has already dried, even if the ink of the second color comes into contact with the ink of the first color, it does not bleed or become a mixed color, and a clear pattern can be expressed with a clear color. did it.

Because of the residual heat received by the drying device 7 on the deck material 1, the ink printed for the second color was dried fairly quickly by natural drying without using the drying device. The colored transparent resin solution was applied as a top coat to the printed pattern surface of the deck material 1 on which the second color was printed and the ink was dried.

(Embodiment 2) As shown in FIG. 2, as a drying device 4, a blow-out port 44 opened in a trapezoidal shape toward the deck material 1 is connected to a blower 46 via a blower pipe 45. An air blower 42 and an exhaust device 43 surrounding the air blower 42 and the deck material 1 and connected to an exhaust pipe 47.
Printing was performed in the same manner as in Example 1 except that the air of 46 ° C. was blown from the blower 46 at a flow rate of 3.5 m ³ / min.

As a result, the ink printed by the first offset gravure printing device 6 dries quickly before being printed by the second offset gravure printing device 7, and the second color ink comes into contact with the first color ink. Even if it did not bleed or mix colors, a clear pattern could be expressed with vivid colors.

(Embodiment 3) As shown in FIG. 3, the intake device 52, in which the opening 51 widened toward the deck material 1 is closed by a plate provided with a large number of intake holes of 8 mm in diameter, is exhausted. Printing was performed in the same manner as in Example 1 except that the drying device 5 connected to the vacuum pump 54 via the tube 53 was used to suck at a negative pressure of about 500 mmHg.

As a result, the ink printed by the first offset gravure printing device 6 dries quickly before being printed by the second offset gravure printing device 7, and the second color ink comes into contact with the first color ink. Even if it did not bleed or mix colors, a clear pattern could be expressed with vivid colors.

In the above-mentioned Examples 1 to 3, the single drying method was used, but it is also possible to use two or more of these methods in combination, whereby the effect of accelerating the drying is more remarkable. Therefore, it is preferable.

[0029]

According to the method of printing a flooring material of the present invention, even when a plurality of colors of ink are continuously printed, the colors of different printing inks are not mixed and bleeding, or a color mixture is not caused by mixing. You can reveal a clear pattern with vivid colors,
The printed product value can be increased. In addition, since the ink printed on the floor material surface dries quickly, the printing speed can be increased.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of a floor material printing method of the present invention.

FIG. 2 is an explanatory diagram showing another embodiment of the present invention.

FIG. 3 is an explanatory diagram showing another embodiment of the present invention.

[Explanation of symbols]

 1 Floor material (deck material) 2 Belt conveyor 3,4,5 Drying device 6,7 Offset gravure printing device

Claims (1)

[Claims] 1. When the long floor material is conveyed and printed on the surface of the floor material in a plurality of steps, the ink on the surface of the floor material that has already been printed is dried at each step. Characteristic floor material printing method.