JPS62117665A - Production of colored of printed transparent resin film - Google Patents

Abstract

PURPOSE:To apply transparent printing or coloring without generating any irregular colors by spraying atomized ink along a master picture pattern drawn on the surface of a transparent resin film. CONSTITUTION:Desired coloring is applied on the surface of a transparent resin film by an ink-jet system along the master picture pattern to produce the colored or printed transparent resin film. In this case, atomized ink is sprayed from a nozzle 2 on a transparent resin film 1 having a surface (a) to be colored along the picture pattern. Consequently, irregular colors are not generated, transparent printing or coloring can be applied, and a material to be stuck on a transparent material in buildings, automobile window glass etc., can be produced.

Description

Detailed Description of the Invention [Industrial Field 1] The present invention relates to a method for producing a colored or printed transparent resin film (film or sheet). The surface is colored or printed with a desired coloring following the original pattern using an inkjet method.

[Prior Art 1] Conventionally, when printing or coloring a pattern on the surface of a synthetic resin film, mainly the reflected light is used. : It has been carried out assuming that.

For example, printing or coloring on posters, wallpaper, packaging films, bacceno, etc. gives the viewer a sense of beauty or recognition of the design, text, etc. due to the reflected light from the surface. It was not intended to make the printed pattern or coloring state of the colored resin surface visible through the transparent resin film printed or colored from the back side.

Printing or coloring is recognized by reflected light from the surface of h1'n
In the case of t, the synthetic resin film of the base material has a smooth surface, and the film is made of an opaque or translucent material. Desired patterns are printed or colored on the surface of these synthetic resin films using conventional printing methods such as gravure printing, 7-lexo printing, offset printing, silk screen printing, etc. Things have been done.

Human blood on the synthetic resin film is printed or colored with 1/1 uniform printing or O' by color determination. If this occurs, that is, if there is local variation in the amount of reflected light of the desired color tone, in order to correct this, apply ink of 5-tone color to reduce the amount of reflected light from the base. It is common practice to increase the hiding rate and eliminate color unevenness or tone differences. That is, more specifically, it is usual to take measures such as overcoating or increasing the concentration of color removal in the ink.

“Problems to be solved by the invention” However, transparent synthetic resin membranes (films or sheets)
Specifically, the purpose is to print or color a picture and allow a predetermined amount of transmitted light to pass through this transparent synthetic resin film from a different side than the printed or colored side, that is, from the back side. However, if printing or coloring results in color unevenness or tone differences, the above-mentioned methods cannot solve this problem.

In other words, in order to correct areas where color unevenness or differences in tone have occurred, the density of the coloring agent is corrected with ink that has scorched, or when the nail is painted, the printed or colored surface can be seen through the transparent resin film. When observing the transmission range from the back side, the color unevenness not only does not improve, but often gets worse. Further, even if the color unevenness is corrected to some extent, the amount of light transmitted through the corrected portion is usually lower than a predetermined value, and the desired amount of transmitted light cannot be adjusted.

In recent years, other transparent materials (for example, printed or laminated to glass, etc., used as materials for architectural or automatic Ill window glass, showcases, furniture, etc.) have been used.
Demand for colored transparent resin films has been increasing. However, in order to obtain a bonded product with a good finish that does not contain bubbles or the like, it is often preferable that the surface of the transparent resin film is not smooth, but rather that the surface is smooth. However, when a transparent resin film with such a rough surface is printed or colored by the above-mentioned known methods, color unevenness or differences in tone are more pronounced than those with a flat surface. It's easy to happen.

``Means for Solving the Problem 1 The inventors of the present invention have thoroughly studied and developed a method for coloring the printed material without uniformly creating color unevenness on the transparent resin film. The present invention was achieved based on the knowledge that the above problem can be solved by applying the ink-to-end method.

That is, the gist of the present invention is to provide colored or printed transparent tji IN v! In manufacturing,
This method consists in producing a colored or printed transparent resin film, which is characterized by spraying an ink liquid in the form of a spray along the original pattern on the surface of the oil film.

The method of the present invention will be explained in more detail below.3 In the present invention, the transparent resin film is, for example, a 6-polymer sheet or film cut into various shapes depending on the application and made of the following materials. Vinyl chloride or co-ITLh
For example, vinyl chloride-vinyl acetate copolymer, polyethylene or its copolymer, such as ethylene acid-resistant vinyl copolymer, ethylene-acrylic acid or acrylic acid ester copolymer, polypropylene or its copolymer, polybutene-1 or its copolymer. copolymer, polystyrene or its copolymer, polyurethane, polyester, polyamide,
Polyimide, polyvinyl alcohol, polyvinyl alcohol derivatives, such as polyvinyl acetal, polymethacrylic acid ester, or copolymers thereof.

Therefore, these transparent resin films can be selected from ones having different thicknesses and transparency depending on the purpose.

In the present invention, for example, it is preferable that the thickness is 20 to 2000 μm and the transmittance in an uncolored state is 75% or more. It is preferable that the surface of the resin film is smooth, but the surface to be painted with 71 colors is based on the upper point average IIL described in JIS BO61.
If the surface is to be roughened, it may have a roughness in the range of 5 to 500μ, preferably 1O-u200μ.

In the present invention, colorants for the ink liquid used include inorganic and organic pigments, disperse dyes, oil-soluble dyes, and resin coloring dyes. Specifically, for example, U.S. Patent No.
No. 636420, No. 2739080, No. 291437
No. 3, No. 3346526, No. 3441361, No. 3
Colorants described in Japanese Patent Publication No. 591406 and Japanese Patent Publication No. 55-45038 are preferably used. More specifically, Calco Oil Yellow (CI Solvent Yellow 46), Oil Blue A ((, I Solvent Blue 36), Plasto Violet MR (Turben F Violet 17), Blue Gui (CI61525L Eloplue, Cornstam Orange, Interchem Acetate) Biorecito R Base (Violet No-1), Plast Yellow MGS (Bluvent Yellow 40), Sumibrite Flu OA, Sumiplast Tread FS, Sumiplast Yellow FO (Sumiplast is produced by Sumima Kagaku Kogyo Co., Ltd.)
), Solvent Green No. 19, Solvent Brown No. 33, Anthraquinone Green, Calf 7 Ein Yellow ZR, Velox Yellow N
o, 9, Calfoil Yellow ZG Conch, Disperse Red 15 (CINo, 60710), Yellow Gui (CINo, 12700), Amaplast Blue O
AP, Amaplast Yellow GH8 (CINO, 588
40), Plast Pink MBS1 Solvent Blue 36
, seligsol STN, etc., but are not limited to these examples.

The ink liquid in the method of the present invention is prepared by dissolving or dispersing the colorant in an organic solvent or an organic dispersion medium at a concentration in the range of 0.1 to 5 Offlt2% based on the total amount of the colorant and the solvent/dispersion medium. be done.

The organic solvent or organic dispersion medium used to dissolve or disperse the colorant may be one or more of known solvents such as hydrocarbon, halogenated hydrocarbon, alcohol, ester, and amide light. combinations, such as combinations of inpropyl alcohol and cyclohexanone, combinations of dimethylformamide and toluene, combinations of N-netylpyrrolidone and isopropyl alcohol,
Examples include a combination of trimethylformamide and inpropyl alcohol.
It is characterized by being sprayed using an inkjet method. Unlike the conventional printing method 1 coloring method, the ink jet method sprays ink liquid in the form of a mist at a fixed distance from a nozzle in a non-contact manner, regardless of whether the surface of the transparent resin film is smooth or rough. Therefore, it has the advantage of being able to print and color uniformly without color unevenness.

Therefore, in the method of the present invention, per length II#111 to be printed or colored by an inkjet method,
, 100 pieces, preferably 2.532 pieces, with a diameter of 0.03 to 0
, 5111111 is sprayed with ink liquid. Particles can be generated using a method using a piezoelectric element, a heating method, an electromagnetic method, etc.Furthermore, with an inkjet method, the size and number of ink mist particles sprayed from an ink jet nozzle can be Can be freely controlled by electrical signals.

More preferably, during printing or coloring with ink liquid, the amount of transmitted light through the transparent resin film of the base is detected and compared with a predetermined set value for the amount of transmitted light to control the amount of ink jetted from the ink jetting nozzle. It is better to take a method. This will be explained with reference to an explanatory diagram of the control mechanism shown in FIG. 2. 1 is a transparent resin film having a surface a to be colored according to the pattern as seen from the side, 2 is an ink jet nozzle facing surface a, and 3 4 is a sensor located on the back side of the transparent resin film at a position opposite to the ink jet nozzle 2, and has a mechanism that moves in contrast with the movement of the ink jet nozzle 2, and detects the transmitted light 1it of the colored surface of the transparent resin film 1; A piezoelectric transducer (5) receives the amount of transmitted light from the sensor 3 as an electrical signal, performs a comparison calculation with the appropriate amount of transmitted light according to a pre-input program, and controls the size of the ink droplets sprayed. , a controller for commanding voltage adjustment, and 6 an ink liquid tank attached to the ink jet nozzle 2. By using such a control device, the amount of ink jetted is controlled to be constant, and density resolution is achieved.ii'f Then, f'-1 "I color book row" is completed.

In addition, according to the method of the present invention, by using a plurality of ink jetting nozzles, it is possible to print or color a solid multicolored pattern on a picture, and it is also possible to print or color a solid multicolored pattern on a picture, and However, by using multiple ink ejecting nozzles to spray ink liquid with a concentration of
11- It is possible to print or color a shading pattern in different colors.

[Effects of the Invention 1] As described in I below, the present invention is a method in which ink liquid is sprayed in the form of a spray and colored along with the original picture drawn on the entrance surface of a transparent resin film, which is different from conventional methods. printing method or coloring 17
It has the advantage of being able to print transparently or print in 31 colors without color unevenness. The method of the present invention is useful for producing materials for pasting and fixing transparent materials in buildings, automobile windows, white cases, home furnishings, etc.

Example 1 Next, the present invention will be described with reference to examples, but the present invention is not limited to the following examples unless it exceeds the gist thereof.

Example 1 60 parts of isopropyl alcohol, 40 parts of cyclohexanone
Mix and prepare a coloring ink liquid consisting of 95.0% mold breakage of a mixed organic solvent consisting of 1.5% and 5% streetcar of Oil Blue A (C, 1, Solvent Blue 36%), and pressurize with a Teflon filter with a pore size of 1. After filtration, use a clean air pump to pump the air. Using this ink liquid, a coloring device with an on-demand coloring head (discharge orifice diameter 50μ, piezo vibrator drive voltage 60V, frequency 4KHz) that sprays the ink liquid with a piezo vibrator is used to produce a 350+ am (vertical), 500 mm (width), Thickness (
1,76+o+o, a rectangular rough-surfaced transparent resin film made of polyvinyl butyral and having a surface roughness of 25μ was colored.

The resulting colored one-sided transparent resin film was sandwiched between two colorless transparent sheets to produce a bonded product. Measurements were made at arbitrary positions t ( ) 0 on the colored surface using a 340-meter Machibun spectroscopic roundometer. As a result, the fluctuation in transmittance, which is a measure of the occurrence of color unevenness, was +1Iax: 9%, m1n = 7%, and standard ai* = 0.3% for an average transmittance of 3%.

Comparative Example 1 An ink paste for gravure printing was prepared by adding and dissolving polyvinyl butyral lenone to the ink liquid having the same composition as that prepared in Example 1 so as to have a viscosity of 40 cp at 25°C. 1 was prepared.

Using the obtained ink paste, the cell t>40μ, &
Using a gravure printing method of E11150 #a/inch, the first color was applied by the gravure printing method to a rough resin film made of polyvinyl butyral having the same size as that used in the Chγ single color test in Example 1.

1! The level of color unevenness of the resin film is measured using the method described in Example 1.
A bonded product was obtained by sandwiching it between two pieces of glass using the same method as described above, and the transmittance was measured. As a result, the transmittance fluctuation is in accordance with the average transmittance of 8%, +aax = 10%
, tnin=6%, standard deviation=0.7%.

From the above results, it is clear that in Example 1 according to the method of the present invention, color unevenness occurs less in the colored product than in Comparative Example 1, and is significantly improved.

Example 2 Four types of coloring ink liquids A to D having the compositions shown in Table @1 below were mixed and prepared. An on-demand coloring head (
The coloring device has a discharge orifice diameter of 35μ, a heating resistance value of 150Ω, a driving voltage of 30V, and a frequency of 2KHz.
Tade 35011II11, width 500mu+, thickness 0.4
A polyvinyl butyral roughened transparent resin film 1 having a rectangular shape and a surface roughness of 20 μm and a surface roughness of 20 μm was simultaneously colored with four colors along with a pattern as shown in FIG.

The obtained colored negative side transparent 0 (oil film) was sandwiched between two positive sheets in the same manner as described in Example 1 to obtain a bonded product, and the transmittance in each colored area was calculated. The results are shown in Table 2, and a multi-colored transparent resin film with no color unevenness was obtained in each colored region.

T-mail ,′,,,,tX.

z7.1.・−.

Table 1 Table 2

[Brief explanation of drawings]

FIG. 1 is a plan view of a rough transparent resin film colored according to Example 2, and FIG. 2 is an explanatory diagram of a coloring control mechanism to which the method of the present invention is applied.

Claims (6)

[Claims] (1) When manufacturing a colored or printed transparent resin film, an ink liquid is sprayed in the form of a spray along the original pattern on the surface of the transparent resin film. Production method. (2) A colored or printed transparent resin film according to claim (1), characterized in that ink liquid of one color or two or more colors is atomized and sprayed onto the surface of the transparent resin film at the same time. Production method. (3) A colored or printed transparent resin according to claim (1), characterized in that ink liquid of one or more concentrations per color is atomized and sprayed onto the surface of the transparent resin film. Membrane manufacturing method. (4) Claim (1) characterized in that the amount of ink liquid sprayed is controlled while measuring the amount of light transmitted through the rough transparent resin film that is colored by spraying the ink liquid. A method for producing a colored or printed transparent resin film. (5) The transparent resin film is made of polyvinyl butyral, polyvinyl chloride, polyethylene terephthalate, 6-nylon,
6-6-nylon,
To claim (1). The method for producing a colored or printed transparent resin film according to item (4). (6) The surface of the transparent resin film has a roughness of 5 to 500μ when expressed by ten-point average roughness according to JISB061. The method for producing a colored or printed transparent resin film according to item (5).