WO2015147359A1 - Aqueous gravure ink composition for pvc sheet, and pvc decoration sheet using same - Google Patents

Abstract

The present invention relates to an aqueous gravure ink composition for a PVC sheet, which is gravure-printed on a PVC sheet on which printing is to be performed. The ink composition according to the present invention comprises: methanol; a polyurethane dispersion (PUD) containing an emulsifier for compatibility with the methanol; a thickener; silica; and a pigment. According to the present invention, an ink composition is rapidly dried during gravure printing, and thus gravure printing productivity is improved, and since the ink composition is an aqueous ink composition, environmental pollution caused by the use of an organic solvent, or harmful effects on the human body can be prevented.

Description

Aqueous Gravure Aqueous Ink Composition For PBC Sheet And FVC Decor Sheet Using The Same

The present invention relates to an ink composition for gravure printing, that is, a gravure ink composition, and more particularly, to an aqueous gravure ink composition for printing a PVC (Polyvinyl Chloride) sheet and a FVC decor sheet using the same.

Gravure printing refers to printing in which ink is deposited on a surface of a film to be printed as a metal cylinder rotates. In the gravure printing, the color concentration is determined according to the depth of the main point, and the type of color depends on the number of cylinders used in the entire process. The printing medium (printed object) supplied for gravure printing is generally in roll or film form, that is, sheet form, and gravure printing is suitable for high speed mass printing with photographic quality.

The ink composition used for printing gravure, that is, the gravure ink composition includes a pigment, a resin (ink binder), a solvent, and an additive, and a hydrocarbon-based organic solvent such as toluene, xylene, cyclohexanone, etc. is mainly used as the solvent. .

By gravure printing, various sheets such as floor decorative materials, wallpaper and furniture films, and more specifically decorative sheets (deco sheets) for finishing surfaces such as floors, walls or furniture, are manufactured, and an organic solvent contained in the gravure ink composition. In the drying process of the ink is released into the atmosphere causing air pollution, deteriorating the living environment or work environment, such as irritating eyes or skin, there are a number of problems, such as the risk of fire.

Recently, as the interest in environmental protection, working environment, and indoor living environment is increasing, laws are being enacted to prohibit or suppress the use of organic solvents in each country. Therefore, the use of organic solvents is restricted.

Therefore, the application of an aqueous gravure ink composition with little or no human irritation is required for the gravure printing. However, the aqueous ink composition has a low drying speed during the gravure printing process, which greatly reduces the productivity of gravure printing, thereby inhibiting mass production of printed matter. And the manufacturing cost of the ink composition itself also has a problem such as increased more than when using an organic solvent, in particular, drying problems that inhibit mass production of gravure printing becomes a problem.

The present invention has been proposed to solve the above-described problems, and an object thereof is to provide an aqueous ink composition for gravure printing, that is, a fast-drying aqueous gravure ink composition, and a FBC decor sheet using the same.

It is another object of the present invention to provide an aqueous gravure ink composition having no or low tacky, and furthermore, having an excellent adhesion (coating adhesion) of a coating film protecting a printing surface, and a FBC decor sheet using the same. It is for.

One embodiment of the present invention for solving the above object is an aqueous gravure ink composition for a fibC sheet which is gravure printed on the fibC sheet which is a printed body: methanol; Water Dispersed Polyurethane (PUD; Polyurethane Dispersion) containing an emulsifier for compatibility with the methanol; Thickeners; Silica; And it provides an aqueous gravure ink composition for FBC sheet containing a pigment (Pigment).

The methanol is 54 to 129 parts by weight, the thickener is 1.8 to 28.6 parts by weight, the silica is 1.8 to 11.5 parts by weight, the pigment is 1.8 to 22.9 parts by weight based on 100 parts by weight of the water-dispersed polyurethane. The pigment is an organic pigment, but is not limited thereto.

In addition, the thickener includes polyvinylpyrrolidone (PVP).

The aqueous gravure ink composition for fibC sheet may further include at least one additive of an antifoaming agent, a leveling agent, and a dispersing agent. The additive is included 1.8 to 8.6 parts by weight based on 100 parts by weight of the water-dispersed polyurethane.

A more specific embodiment of the present invention is an aqueous gravure ink composition for a fibC sheet which is gravure printed on a fibC sheet which is a printed material: 30 to 45 based on 100% by weight of the aqueous gravure ink composition for the fibC sheet. Wt% methanol, 35-55 wt% water-dispersed polyurethane containing emulsifier for compatibility with the methanol, 1-10 wt% thickener, 1-4 wt% silica, and 1-8 wt% Provided is an aqueous gravure ink composition for fibC sheet comprising an organic pigment.

The aqueous gravure ink composition for fibC sheet may further include an additive of 1 to 3% by weight based on 100% by weight of the aqueous gravure ink composition for fibC sheet. And the thickener includes polyvinylpyrrolidone (PVP; Polyvinyl Pyrrolidone). The particle size of the silica is 1 ~ 10㎛.

Another embodiment of the present invention includes: FBC sheet; Provided is a FVC deco sheet comprising an ink layer which is gravure printed on the FVC sheet by the above-described aqueous gravure ink composition for FVC sheet to form a pattern.

The FBC decorative sheet may further include a coating layer covering the ink layer to coat the surface of the FBC decorative sheet. The coating layer may be a lamination coating or a clear coating.

According to the present invention, the ink composition dries quickly during gravure printing, and thus the productivity of gravure printing is improved, and since the ink composition is an aqueous ink composition, environmental pollution or human hazards caused by the use of organic solvents can be prevented.

In addition, according to the present invention, the ink composition may be prevented from sticking to the second degree or adhered to the second degree transferred to the printed object (Fig. C sheet) during the first degree printing process. The print quality can be improved along with the productivity.

In addition, according to the present invention, since stickiness (tackyness) of the printing surface is prevented, a phenomenon that the interlayer interface is stuck when the PVC decor sheet is wound in a roll shape can be prevented, and further, a lamination film (coating film) covering the ink layer. Since the adhesion of the can be secured stably the surface quality of the FBC decorative sheet can be improved.

1 is a photograph showing an example of a FBC deco sheet prepared using the aqueous gravure ink composition for FBC sheet according to the present invention.

FIG. 2 is a schematic cross-sectional view of the decor sheet shown in FIG. 1.

3 is a flow chart schematically illustrating a process of preparing a water-dispersed polyurethane containing an emulsifier.

Hereinafter, a preferred embodiment of the aqueous gravure ink composition for FBC sheet according to the present invention will be described in detail.

The aqueous gravure ink composition for FVC sheet according to one embodiment of the present invention (hereinafter, abbreviated as 'ink composition') includes methanol, PUD (polyurethane dispersion), and thickener. And silica and pigment, and these components may be mixed in water.

The methanol functions as a solvent with water, preferably distilled water, and the water-dispersed polyurethane (hereinafter abbreviated as 'PUD') functions as an ink binder, increasing the ink viscosity according to the specification of the thickened product, Silica is a component that minimizes or prevents the sticky of the printed surface after drying.

And the pigment is a component for implementing a colored or colorless color as well known, there are inorganic pigments and organic pigments in this embodiment is described an example in which the organic pigment is applied as the pigment.

The type of the organic pigment is various, the organic pigment applied to the deck sheet is used that is good in light resistance and heat resistance. More specific examples of the organic pigment, CI Pigment Red 48: 1, 48: 2, 48: 3, 48: 4, 53: 1, 53: 2, 57: 1), eye pigment yellow (CI Pigment Yellow 1, 3, 83), CI Pigment Orange 16, CI Pigment Blue 15: 3, 15: 6, CI Pigment Green 7 ), Anthraquinone series (Indanthrene Blue CI Pigment Blue 60), thioindigo series (Thioindigo Magenta CI Pigment Vilot38), perinone series (Perinone Orange CI Pigment Orange 43), perylene series (Perylene Maroon CI Pigment Red 179), quinacridone series (Quninacridone Red CI Pigment Violet 19), CI Pigment Red 177, and CI Pigment Green 36, and the like, and the organic pigments are not limited thereto.

In the gravure printing, the drying time of the ink composition is a factor that significantly affects the productivity of printing. Therefore, the quick drying property of the ink composition is directly related to the productivity, and the aqueous gravure ink composition is fast drying, for example, 45 seconds. Although the following drying time is required, conventionally, it was difficult to satisfy the quick drying property due to the characteristics of the aqueous ink composition.

In more detail, in the case of a PVC sheet (PVC film), which is a type of printed material used for gravure printing, a thickness of 0.6 mm to 2.0 mm is generally used and a thickness of 0.8 to 1.5 mm.

Generally, when the thickness of the PVC sheet is 1.5 mm, the ink composition is dried at a temperature of 60 ° C. or less in the printing process, and when the thickness of the PVC sheet is 0.8 mm, the ink composition is at a temperature of 45 ° C. or less in the printing process. It is a situation that needs to be built. This is because, when the ink composition is dried at a temperature higher than the above-mentioned temperature, the PVC sheet is stretched due to thermal deformation, thereby deteriorating the surface smoothness.

In addition, as described above, in the gravure printing, the printing speed is required to be printed at a speed of at least 30 m / min since it is directly connected to productivity, and the printing speed is different for each gravure printing machine, but the PVC sheet is dry zone. It takes about 30 ~ 45 seconds to dwell in the Dry Zone.

The printing conditions required in the market, especially the drying conditions, when the thickness of the PVC sheet to be printed is 1.5 mm, 45 seconds or less, for example, 30 to 45 seconds at a temperature of 60 ° C. or lower, and the thickness of the PVC sheet is 0.8 mm. In the case of 45 seconds or less, for example, 30 to 45 seconds at a temperature of 45 ℃ or less, the shorter the drying time may be higher productivity.

The general gravure printing machine can print from 1 to 8 degrees.If the printing speed is faster than the drying time of ink, the ink transferred to the printed object is not hardened and printed on 2 degrees after 1 degree printing. Since poor printing can be caused, dryness, that is, quick drying, is a factor that determines the quality of printing together with the productivity of printing.

In the present embodiment, with respect to 100 parts by weight of the PUD, 54 to 129 parts by weight of the methanol, 1.8 to 28.6 parts by weight of the thickener, 1.8 to 11.5 parts by weight of the silica, 1.8 to 22.9 parts by weight of the pigment is included. . The pigment is an organic pigment, but is not limited thereto. The thickener is preferably polyvinyl pyrrolidone (PVP), but is not limited thereto.

The polyvinyl pyrrolidone (hereinafter, abbreviated as 'PVP') increases in proportion to the viscosity of the ink as the content in the ink increases, and when the PVP is used as a thickener, a coating film is used to coat the decor sheet after gravure printing. For example, the adhesion (coating adhesion) of the transparent PVC film for lamination coating is also excellent.

If the content of the methanol is less than the above-mentioned range, the drying is not satisfactory, and the drying property cannot be satisfied. If the content of the methanol is more than the above-mentioned range, the content of the PUD is relatively low, so that the adhesion between the material (printed material; PVC sheet) and the ink composition is relatively low. This weakening and thus it can be confirmed through the present invention that the print quality is reduced during printing.

And if the content of the thickener is less than the above-mentioned range is difficult to secure the viscosity, the print workability is bad, and if the above-mentioned range is higher than the above-mentioned range because there is a problem of manufacturing cost rise, the above-mentioned range is preferable, but the range is not necessarily limited thereto. The viscosity of the ink composition is preferably 50 cps or more, preferably 80 cps to 300 cps, but printing is not impossible even if it is 50 cps or less.

Next, the silica has the effect of increasing the viscosity of the ink composition and the blocking (blocking) effect (anti-sticking effect).

If the content of the silica is smaller than the above-mentioned range, stickiness (tacky) may occur after drying. More specifically, the surface (printing surface) after drying at 60 ° C. for 45 seconds in a dry oven. It can be confirmed that it is sticky, but if the silicon content is small, it can be confirmed by experimenting that the printing surface is sticky. On the contrary, if the silica content is higher than the above-mentioned range, the adhesion of the lamination coating may be weakened, so the above-mentioned range is preferable, but the range is not necessarily limited to the above-described range.

And it is preferable that the particle size of the said silica is 1 micrometer-10 micrometers. The particle size of general silica is about 7 nanometers (nm) to 20 microns (μm). If the particle size of the silica is less than 1 μm, it is difficult to secure a blocking (blocking) effect, and if it exceeds 10 μm, the roll mesh is used for gravure printing. ) May be blocked.

Blocking generally means that the ink composition becomes sticky above a certain temperature so that the interlayer contact surface (interlayer interface) of the decosheet adheres well when the decosheet is rolled after printing.

More specifically, if there is stickiness on the printing surface when the material (PVC sheet) is turned to 2 degrees after printing at 1 degree, the material may stick to the 2 degrees at the time of 2 degrees of printing, and the decoration sheet after printing Even when winding in the form of a roll, the interlayer contact surface of the decor sheet may stick, so it is good to prevent the printing surface stickiness.

In addition, when the content of the pigment is less than the above-mentioned range, the coloring power (color strength) is lowered, and if it is higher than the above-mentioned range, the manufacturing cost increases and the viscosity increases, so that the workability may deteriorate. It doesn't happen.

The ink composition may further include at least one additive of an antifoaming agent, a leveling agent, and a dispersant. More specifically, with respect to 100 parts by weight of the water-dispersed polyurethane, the additive includes 1.8 to 8.6 parts by weight, but is not limited to this range.

The PUD is a composition containing an emulsifier to increase compatibility with methanol, that is, the content of methanol in the ink composition may be increased due to the emulsifier, thereby shortening the drying time.

Good compatibility means that there is no change in ink properties when the two raw materials are mixed well. If the compatibility is poor, the transparent ink binder becomes cloudy or the viscosity of the ink is not stable. ) May occur, and particles such as pigments and silica may precipitate.

In more detail, an embodiment of the present invention, the ink composition, based on 100% by weight of the total composition, 30 to 45% by weight methanol, 35 to 55% by weight containing an emulsifier for compatibility with the methanol Water dispersion polyurethane, 1 to 10% by weight of thickener, 1 to 4% by weight of silica, and 1 to 8% by weight of organic pigments. In addition, the ink composition may further include an additive of 1 to 3% by weight, and distilled water may be mixed more specifically with water as the remaining amount together with the components so that the total weight may be 100. In addition, the thickener preferably includes polyvinylpyrrolidone (PVP) as described above.

If the content of the water-dispersed polyurethane (including the emulsifier) is less than 35% by weight relative to the total weight may result in poor print quality (ink adhesion), if the content exceeds 55% by weight relative to the alcohol content is reduced to reduce the dryness When the content of each component is in the above-described range, it can be seen that an aqueous gravure ink composition having excellent ink viscosity stability, dryness, tackyness, coating adhesion, and the like can be prepared.

1 and 2, the present invention provides an ink layer 12 which is gravurely printed on the PVC sheet 11 by the above-described ink composition and the above-described ink composition to form a pattern. Disclosed is a PVC decor sheet 10 comprising, the ink layer 12 is covered by a coating layer 13 so that the surface of the decor sheet 10 may be coated by the coating layer (13).

The coating layer 13 may be a lamination coating layer (Lamination Coating Layer) or a transparent coating layer (Clear Coating Layer) by a two-component urethane, an example of the lamination coating layer may be a transparent PVC film.

For reference, in the general decor sheet thickness of the PVC sheet 11 is 0.6mm ~ 2mm PVC sheets 11 of 0.8 ~ 1.5mm thickness is generally used for gravure printing, the thickness of the ink layer 12 is 3㎛ ˜6 μm, the thickness of the coating layer, for example, the lamination coating layer 13 is 0.8 mm to 3 mm, and the adhesion force (coating adhesion force) of the coating layer 13 is required to be 1.8 kgf / in or more.

Hereinafter, an embodiment of a PUD containing the emulsifier will be described with reference to FIG. 3.

The method of manufacturing an embodiment of the PUD, a prepolymer manufacturing step of preparing a prepolymer, a neutralization step of adding a neutralizing agent to the prepolymer, and adding an emulsifier to obtain an aqueous dispersion polyurethane (PUD) containing an emulsifier. Obtaining a PUD.

In this embodiment, the PUD proceeds in almost the same manner as a generally known PUD manufacturing process, but discloses an example of using a PUD, that is, a PUD containing an emulsifier as an ink binder, which is manufactured through an emulsifier input process after the neutralization step.

In preparing the fast-drying ink composition as in the present embodiment, PUD having good compatibility with the solvent methanol is important, which is an important technical feature of the present invention. The prepolymer is prepared by reacting a polyol and dimethylol propionic acid (hereinafter referred to as 'DMPA'), and the DMPA provides an ionic group that enables water dispersion in water.

The polyols are broadly classified into polyester polyols, polyether polyols, polycarbonate polyols, and the like.

Examples of the solvent used in the prepolymer reaction include N-methylpyrrolidinone (NMP) and acetone (Acetone). In this embodiment, acetone is disclosed as the reaction solvent.

More specific examples of the prepolymer manufacturing process are as follows.

In a 1 L four-necked flask at room temperature, 9.74% by weight of polyol, polymethyl ethylene glycol (Mw = 2000, Aldrich), 12.74% by weight of Priplast 3192 (Mw = 2000, Polyester polyol, Croda) and dimethylol propionic acid, an ionic compound. (dimethylol propionic acid, DMPA, Pestorp) 0.88% by weight and the catalyst DBTDL (dimethylol propionic acid; DMPA, Pestorp) 0.01% by weight, and then heated to 75 ℃ stirred (Stirring), and further IPDI ( 7.49% by weight of isophorone diisocyanate; isophorone diisocyanate, Asahi Kasei Co., Ltd. was added and the reaction was performed at 75 ° C. for 90 minutes. The PTMG is a polyether polyol and the Priplast 3192 is a polyester polyol.

And after cooling the temperature of the reactants described above to 50 ℃, the prepolymer is obtained by injecting 9.74% by weight of the acetone to the reactants at 50 ℃ to obtain a viscosity (lower viscosity) easy to disperse Can be.

After acetone is added to the reactant, a neutralization step is used to neutralize the prepolymer, and finally, a step of obtaining a PUD containing an emulsifier is performed.

More specifically, the carboxylic group of DMPA, which forms an anion, is neutralized by volatile amines such as triethylamine (TEA) and an ionic group is formed on the prepolymer. In addition, the PUD may be finally manufactured through the prepolymer production step and the neutralization step, and diamine may be added to the PUD to increase the molecular weight as necessary.

In this embodiment, after neutralizing the prepolymer with a neutralizing agent (TEA) to increase the methanol content in the ink, the final emulsifier is added to the composition after the neutralization step in order to increase the compatibility with alcohol. It is characterized by producing a fast-drying aqueous gravure ink composition by obtaining a containing PUD and using a PUD containing the emulsifier (referred to as 'PUD 1' for the purpose of distinguishing from a general PUD containing no emulsifier).

In the preparation example of PUD disclosed in this example, 0.5 wt% of triethylamine (TEA, Junsei Chemical Co., Ltd.) was used as the neutralizing agent. In this preparation example, the neutralizing step includes adding a neutralizing agent, specifically triethylamine, to the prepolymer and stirring the mixture for 30 minutes.

In addition, an embodiment of PUD, that is, PUD 1 having improved compatibility with methanol is obtained by adding an emulsifier to the composition after the above-described neutralization process.

Examples of the emulsifier include alkyl phosphate (Alkyl phosphate), Ammonium (POE) Alkyl Aryl Ether Sulfate, Sulfosuccinate, Sodium Dioctyl Sulfosuccinate, and in the present example, sodium dioctyl sulfosuccinate 0.97 wt% Was used as emulsifier.

More specifically, as described above, the emulsifier is added to the composition (primary composition) obtained by adding a neutralizing agent to the prepolymer and stirring, and water (distilled water or water) is added to the composition (secondary composition) to which the emulsifier is added. The tertiary composition was stirred at a high speed (800 RPM or more) to disperse the solution (tertiary composition) in which the ion exchanged water was added, and then the emulsifier was volatilized (evaporated) by distillation under reduced pressure. One embodiment of the containing PUD (PUD 1, PUD of 35% solids) can be obtained.

In this production example, 58.43% by weight of ion-exchanged water was used as the water. Of course, the PUD used in the ink composition according to the embodiment of the present invention, that is, the PUD containing an emulsifier is not limited to the result of the above-described manufacturing example and the manufacturing method is not limited to the above-described example, but is compatible with the methanol. PUD containing an emulsifier that enhances the castle is possible as a component of the present invention.

On the other hand, for comparison with the ink composition using the PUD 1, an example of a general water-dispersed polyurethane (hereinafter referred to as "PUD 2") containing no emulsifier was prepared.

The method of preparing the PUD 2 or the content of the component is generally known in the art, and for example, the entire process of manufacturing the embodiment of the PUD1 described above to manufacture the embodiment of the PUD 2 In order to omit the process of adding the emulsifier and to adjust the total weight 100, the content of the ion-exchanged water was adjusted as shown in Table 1 below, the components and contents of one embodiment of the PUD1 and one embodiment of the PUD 2 It is shown in [Table 1] below.

Table 1

ingredient	PUD 1 (% by weight)	PUD 2 (% by weight)
Priplast 3192 (polyon)	12.74	12.74
PTMG (polyon)	9.74	9.74
DMPA (ionic compound)	0.88	0.88
DBTDL (catalyst)	0.01	0.01
IPDI	7.49	7.49
Acetone	9.74	9.74
TEA (trimethylamine)	0.5	0.5
DO113L (emulsifier)	0.97
Ion exchange water	57.93	58.9
TOTAL	100	100

Hereinafter, specific examples of the aqueous gravure ink composition according to the present invention will be described. The following specific examples are only illustrated to explain the present invention, and the present invention is not limited to the following examples.

Preparation of Examples and Comparative Examples

To prepare the Examples and Comparative Examples of the aqueous gravure ink composition according to mixing the components listed in Table 2 in the content of Table 2 at room temperature as follows, and the aqueous gravure ink composition thickness 0.8mm (0.8T) Gravure printing on the PVC sheet of) to prepare a PVC decor sheet.

TABLE 2

ingredient	Example			Comparative example
	1-1	1-2	1-3	2-1	2-2	2-3	2-4	2-5	2-6
PUD 1	45	45	45				45	45	45
PUD 2				45	45	45
Methanol	10	35	44.5	10	35	44.5
ethanol							10	35	44.5
Thickener (PVP K-90)	2	2	2	2	2	2	2	2	2
Silica (TS-100)	2	2	2	2	2	2	2	2	2
Pigment (Blue BG)	5	5	5	5	5	5	5	5	5
Defoamer (Foamex 810)	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5
Leveling agent (BYK-346)	One	One	One	One	One	One	One	One	One
Distilled water	34.5	9.5	0	34.5	9.5	0	34.5	9.5	0
TOTAL	100	100	100	100	100	100	100	100	100

Examples 1-1 to 1-3 are ink compositions in which PUD (PUD 1) containing an emulsifier is applied as an ink binder and methanol is used as a solvent, and 2-1 to 2-3 of the comparative examples are ink. PUD 2 is applied as a binder and methanol is applied as a solvent. Among the comparative examples, 2-4 to 2-6 are ink compositions to which PUD 1 is applied as an ink binder and ethanol is applied as a solvent.

In the above examples and comparative examples, the thickener is PVP K-90 of BASF (Germany) as polyvinyl pyrrolidone, and the silica (Silica) has an average particle size of approximately 9 μm, and DEGUSSA (Germany The pigment is a product of CLARIANT (Germany) as Blue Pigment 15: 3. Next, the antifoaming agent is TEGO Foamex 810 as silicone, and the leveling agent is BYK-346 BYK as silicone.

In addition, Table 3 below shows the performance (initial viscosity, viscosity stability, dryness, tackyness, lamination coating adhesion) of the Examples and Comparative Examples of Table 2 and tested.

TABLE 3

Performance Category	Example			Comparative example
	1-1	1-2	1-3	2-1	2-2	2-3	2-4	2-5	2-6
Initial viscosity (cps)	240	90	65	320	110	100	280	120	90
Ink viscosity stability	stability	stability	stability	Viscosity rise	Viscosity rise	Viscosity rise	stability	stability	stability
Dryness 1	Undried	dry	dry	Undried	dry	dry	Undried	Undried	Undried
Drying 2	Undried	dry	dry				Undried	Undried	dry
Tacky	none	none	none	none	none	none	none	none	none
Coating adhesion	More than 1.8kgf / in

According to Table 3, Examples (1-1 to 1-3) of the ink composition containing PUD 1 and methanol are maintained in a stable ink viscosity, 45 ℃ at a temperature of 60 ℃ in a dry oven (Dry Oven) Tacky (print side sticky) did not appear after drying for a second, and the coating adhesion (adhesion between the print side and the transparent PVC film when lamination coated with a transparent PVC film after gravure printing on the PVC sheet) was also higher than 1.8 kgf / in. Appeared excellent. Ink viscosity stability is the value which confirmed the change of ink viscosity after storing an ink composition in 50 degreeC environment for 7 days, and is the same in the following table | surface.

However, in the case of Example 1-1 in which the content of methanol is 10% by weight, ink on the printing surface is smeared in the drying test (item which confirmed the ink staining after drying according to each drying condition (temperature X time) after 120Mesh gravure printing). Developed (undried; not completely dried). Therefore, in the present invention, the methanol is 54 to 128 parts by weight, more specifically 30 to 45% by weight of the total ink composition based on 100 parts by weight of the PUD containing the emulsifier.

For reference, Drying 1 of Table 3 was tested after drying for 30 seconds at a temperature of 45 ℃ in a dry oven (Dry Oven), Drying 2 was tested after drying for 30 seconds at a temperature of 60 ℃ in a dry oven As a result, the conditions of the said drying test are the same also in the following description. Initial viscosities were confirmed with a Brookfield viscometer.

On the other hand, according to the embodiments of the ink composition using the PUD 2, it was confirmed that the ink viscosity is not stable and the ink viscosity is increased over time, so that the ink viscosity is not stable. More specifically, in Comparative Example 2-1, the ink viscosity was increased from 320 cps to 480 cps, and in Comparative Example 2-2, the ink viscosity was increased from 110 cps to 8,000 cps, and in Comparative Example 2-3, The ink viscosity rose from 100 cps to 15,000 cps, and the viscosity increased relatively in Comparative Examples 2-2 and 2-3 compared with Comparative Example 2-1.

And Comparative Examples (2-4 to 2-6) of the ink composition containing PUD 1 and ethanol is maintained in a stable ink viscosity, dried after drying for 45 seconds at a temperature of 60 ℃ in a dry oven (Dry Oven) No stickiness was observed, and coating adhesion was also excellent, with more than 1.8 kgf / in, but there was a problem in dryness.

In conclusion, when the content of each component is included in the present invention, including PUD 1 and methanol, it can be confirmed through experiments that the performance such as excellent viscosity stability, fast drying, tacky and coating adhesion is satisfied. .

Next, in order to select the excellent thickener test, the aqueous gravure ink composition was prepared by varying the type and content of the thickener as shown in [Table 4] below, and the aqueous gravure ink composition was coated on a PVC sheet having a thickness of 0.8 mm (0.8 T). Gravure printing produced a PVC decor sheet.

Table 4

ingredient	Example			Comparative example
	1-4	1-5	1-6	2-7	2-8	2-9	2-10	2-11	2-12
PUD 1	45	45	45	45	45	45	45	45	45
Methanol	35	35	35	35	35	35	35	35	35
PVP K-90	2	4	6
SN-thickener 624N				2	4	6
Acrysol ASE-60							2	4	6
Silica (TS-100)	2	2	2	2	2	2	2	2	2
Pigment (Blue BG)	5	5	5	5	5	5	5	5	5
Defoamer (Foamex 810)	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5
Leveling agent (BYK-346)	One	One	One	One	One	One	One	One	One
Distilled water	9.5	7.5	5.5	9.5	7.5	5.5	9.5	7.5	5.5
TOTAL	100	100	100	100	100	100	100	100	100

And, Table 5 below is the data to test the performance of the Examples and Comparative Examples of Table 4 shown.

Table 5

Performance Category	Example			Comparative example
	1-4	1-5	1-6	2-7	2-8	2-9	2-10	2-11	2-12
Ink viscosity stability	stability	stability	stability	stability	stability	stability	stability	stability	stability
Dryness 1	dry	dry	dry	dry	dry	dry	dry	dry	dry
Tacky	none	none	none	none	none	none	none	none	none
Coating adhesion	More than 1.8kgf / in					1.6kgf / in	More than 1.8kgf / in		1.5kgf / in

According to Table 5, the embodiments (1-4 to 1-6) of the ink composition comprising a polyvinyl pyrrolidone (PVP) as a thickener has excellent ink viscosity stability, dryness and tacky (print surface sticky). It was found to be absent, and furthermore, the coating adhesion was confirmed to be excellent.

And according to the example (comparative examples 2-7 to 2-12) of the ink composition which used SN-Thickener 624N (SAN NOPCO company) and Acrysol ASE-60 (DOW company) as a thickener, it is excellent in ink viscosity stability and dryness. It was also found that there is no tackyness, but the coating adhesion was slightly lowered as the content of the thickener increased (Comparative Examples 2-9 and 2-12).

In Tables 4 and 5, an ink composition including PVP as a thickener was used as an example and an ink composition including another type of thickener was used as a comparative example. However, in order to compare the performance of the ink composition based on PVP, It is only classified into Examples and Comparative Examples, and other thickeners other than PVP also satisfy the ink viscosity stability, dryness and tacky, and thus are not excluded from the present invention. However, it can be seen that PVP is excellent as a thickener for the present invention because the coating adhesion is excellent.

Next, in order to test the influence of the silica to prepare an aqueous gravure ink composition by varying the content of silica as shown in Table 6 below, the aqueous gravure ink composition is 0.8mm (0.8T) thick material (printed material) That is, gravure printing on the PVC sheet to prepare a PVC decor sheet.

Table 6

ingredient	Example
	1-7	1-8	1-9	1-10
PUD 1	45	45	45	45
Methanol	35	35	35	35
Thickener (PVP K-90)	2	2	2	2
Silica (TS-100)	0.5	2	4	6
Pigment (Blue BG)	5	5	5	5
Defoamer (Foamex 810)	0.5	0.5	0.5	0.5
Leveling agent (BYK-346)	One	One	One	One
Distilled water	11	9.5	7.5	5.5
TOTAL	100	100	100	100

And, Table 7 below is the data to test the performance of the embodiments (Examples 1-7 to 1-10) of [Table 6].

TABLE 7

Performance classification	Example
	1-7	1-8	1-9	1-10
Ink viscosity stability	stability	stability	stability	stability
Dryness 1	dry	dry	dry	dry
Tacky	has exist	none	none	none
Coating adhesion	More than 1.8kgf / in			1.7kgf / in

According to Table 7, examples of the ink composition containing silica were found to be excellent in both ink viscosity stability and dryness, and Example 1- in which the content of silica was less than the content range presented in the present invention. In the case of 7, tackyness (printed surface sticky) is shown, and in the case of Examples 1-10 exceeding the content range shown in the present invention, coating adhesion is shown to be slightly lowered, indicating that silica content is a factor influencing tackyness. It can be confirmed that it can affect the coating adhesion.

However, it can be seen that the ink composition may improve the tackyness only by including silica, and since the ink viscosity stability and dryness are satisfied regardless of the silica content, the silica content is smaller than the content range suggested in the present invention. It is not excluded that the high or high case is applicable to the present invention, and when the silica content is within the content range of the present invention, it can be confirmed through experiments that satisfactory tacky and coating adhesion in addition to ink viscosity stability and dryness.

Having looked at the preferred embodiment according to the present invention as described above, in addition to the embodiment described above, the fact that the present invention can be embodied in other specific forms without departing from the spirit or scope of the present invention It is obvious to them.

Therefore, the above-described embodiments should be regarded as illustrative rather than restrictive, and thus, the present invention is not limited to the above description and may be modified within the scope of the appended claims and their equivalents.

The present invention is a technology used in the field of ink, in particular, the production of water-based ink, the gravure printing industry and the decorative sheet production, such as wallpaper and flooring, according to the present invention, the ink composition is rapidly dried during gravure printing, so the productivity of gravure printing is improved. Since it is improved and is an aqueous ink composition, environmental pollution or human hazards caused by the use of an organic solvent can be prevented.

Claims (12)

1. As an aqueous gravure ink composition for FVC sheet which is gravure printed on the FVC sheet which is the printed material:

   Methanol; Water Dispersed Polyurethane (PUD; Polyurethane Dispersion) containing an emulsifier for compatibility with the methanol; Thickeners; Silica; And an aqueous gravure ink composition for a fibC sheet comprising a pigment.
2. The method of claim 1,

   The methanol is 54 to 129 parts by weight, the thickener is 1.8 to 28.6 parts by weight, the silica is 1.8 to 11.5 parts by weight, the pigment is 1.8 to 22.9 parts by weight based on 100 parts by weight of the water-dispersed polyurethane. An aqueous gravure ink composition for fibC sheet.
3. The method of claim 2,

   The pigment is an aqueous gravure ink composition for a FBC sheet, characterized in that the organic pigment.
4. The method of claim 1,

   The thickener is an aqueous gravure ink composition for a fibC sheet comprising a polyvinyl pyrrolidone (PVP; Polyvinyl Pyrrolidone).
5. The method according to any one of claims 1 to 4,

   An aqueous gravure ink composition for a fibC sheet, further comprising an antifoaming agent, a leveling agent and a dispersant.
6. The method of claim 5,

   Based on 100 parts by weight of the water-dispersed polyurethane, the additive is an aqueous gravure ink composition for FVC sheet, characterized in that 1.8 to 8.6 parts by weight.
7. As an aqueous gravure ink composition for FVC sheet which is gravure printed on the FVC sheet which is the printed material:

   30 to 45% by weight methanol, 35 to 55% by weight of water-based polyurethane containing an emulsifier for compatibility with the methanol, based on 100% by weight of the aqueous gravure ink composition for FVC sheet, 1 to 10 An aqueous gravure ink composition for a fibC sheet comprising a wt% thickener, 1-4 wt% silica, and 1-8 wt% organic pigment.
8. The method of claim 7, wherein

   Based on 100 wt% of the aqueous gravure ink composition for fibC sheets, the aqueous gravure ink composition for fibC sheets further comprises 1 to 3% by weight of an additive.
9. The method of claim 7, wherein

   The thickener is an aqueous gravure ink composition for a fibC sheet comprising a polyvinylpyrrolidone (PVP; Polyvinyl Pyrrolidone).
10. The method according to any one of claims 7 to 9,

    Particle size of the silica is 1 ~ 10㎛ aqueous gravure ink composition for a sheet.
11. F. C sheet;

    A fibC decor sheet comprising an ink layer which is gravure printed on the fibC sheet by the aqueous gravure ink composition for fibC sheet according to claim 1 to form a pattern.
12. The method of claim 11,

    And a coating layer covering the ink layer to coat the surface of the BC deco sheet.

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