KR100553232B1 - Inkjet media using urethane resin for solvent ink - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to inkjet media (output materials) used for indoor and outdoor advertising prints or wide color printing, and more particularly to inkjet media suitable for printing materials limited to oily inks.

The composition of the present invention is a base layer which is a woven fabric of at least one of synthetic fibers or natural fibers; And a polyurethane coating layer coated with a polyurethane resin on the substrate layer, or a mixed polyurethane coating layer coated with a mixture of a polyurethane resin and a resin other than polyurethane, wherein the oily ink is formed on the polyurethane coating layer or the Mixed poly urethane coating layer is printed on the surface.

Inkjet media according to the present invention has excellent durability in the oil-based inkjet printing method can be applied to all the materials and there is an effect that can expect a high resolution when outputting.

Inkjet, media, polyurethane.

Description

Inkjet media for oily solvents using polyurethane resins {Inkjet media using urethane resin for solvent ink}

1 is a cross-sectional view of an inkjet media for an oily solvent according to a first embodiment of the present invention.

2 is a cross-sectional view of an inkjet media for an oily solvent according to a second embodiment of the present invention.

3 is a cross-sectional view of an inkjet media for an oily solvent according to a third embodiment of the present invention.

4 is a cross-sectional view of an inkjet media for an oily solvent according to a fourth embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to inkjet media (output materials) used for indoor and outdoor advertising prints or wide color printing, and more particularly to inkjet media suitable for printing materials limited to oily inks.

The inkjet media according to the present invention has an excellent output resolution compared to the case of directly outputting on a conventional material, and the ink absorption speed is high at the time of output, and high-speed output is possible, and deformation or discoloration does not occur even when displayed outdoors. In addition, the material can be made flexible, making it possible to manufacture banners for oil-based inks.

In general, the oil-based ink jet method has been developed to print directly to a film, cloth, etc. There are many restrictions on the material in the actual application.

In particular, if the film is not a PVC substrate, there is a problem in output resolution and durability, and when printing on a cloth, the resolution of the drawing is remarkably decreased, and as a result, the market has to be given to the aqueous ink jet method.

In addition, when using PVC as an output medium, the temperature should be increased to 170 ° C or higher in order to convert the PVC sol to PVC gel. It becomes brittle due to long exposure to embrittlement. In addition, yellowing is also caused by contamination of the cloth as the plasticizer precipitates high defects.

Therefore, when using PVC, there is a problem in that a picture is not clearly displayed as compared to the aqueous ink jet method having the same resolution due to the above-described causes.

In addition, Patent Application No. 2000-32550 is an output medium of the transfer method, which is different from the oil ink jet of the present invention, and a high pressure spraying of transparent lacquer or transparent polyurethane resin on natural fibers with very fine particles to form a thin medium layer. A method of thermoelectrication by applying heat and pressure is disclosed.

However, although such an output medium is applicable to the transfer method, when the oil-based ink jet method is used, the polyurethane coating layer is thin and ink is smeared. Therefore, in order to prevent this, the polyurethane coating layer should be made thick enough to absorb the ink, which is a problem in that the cost is increased in terms of economy.

It is an object of the present invention to apply all materials from soft materials such as cloth to hard films while maintaining excellent durability in the oil ink jet printing method, and also to print oil-based ink having high resolution such as photographs. (solvent ink) dedicated to the development of materials.

A first aspect of the solvent ink jet media of the invention for achieving the object of the present invention is a base layer which is a woven fabric of at least one of artificial fibers and natural fibers; And a polyurethane coating layer coated with a polyurethane resin on the substrate layer, or a first mixed polyurethane coating layer in which a polyurethane resin and a resin other than polyurethane are mixed and applied. Or it is printed on the surface of the first mixed poly urethane coating layer.

In a second aspect of the oil inkjet media of the present invention, a resin other than a polyurethane resin and a polyurethane resin is mixed between the base material layer of the first aspect and the polyurethane coating layer or the mixed polyurethane coating layer. At least one of the 2nd mixed polyurethane coating layer applied and the non-polyurethane coating layer to which resin other than a polyurethane resin was apply | coated was provided.

When the polyurethane resin is used in the oil-based inkjet output medium as in the present invention, the processing temperature is relatively low at about 130 ° as compared to PVC, and thus the processing is easy. In addition to increasing resolution, environmental regulations have also been relaxed.

In addition, by providing one or more intermediate layers between the base substrate layer and the polyurethane coating layer on the uppermost surface, the ink can not only completely absorb ink during printing, but also has a high absorption rate, and enables high speed printing. The affinity between the coating layers is increased, and the economic efficiency is improved compared to the prior art, and commercialization is possible.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 to 4 show an embodiment of an inkjet print media using an oil ink according to the present invention.

1 is a first embodiment according to the present invention is a base material made of a synthetic fiber, such as polyester fabric, nylon fabric, or natural fibers such as cotton, hemp and the like, and a polyurethane resin and a resin other than polyurethane on the base layer It consists of a first mixed polyurethane coating layer produced by mixing and then applying

Figure 2 is a second embodiment according to the present invention, the base layer made of synthetic fibers, such as polyester fabrics, nylon fabrics, or natural fibers such as cotton, hemp, and the like made by applying a resin other than polyurethane on the substrate layer It consists of a polyurethane coating layer and the polyurethane coating layer produced by apply | coating a polyurethane-type resin again on a non-polyurethane coating layer.

Figure 3 is a third embodiment according to the present invention, a base layer made of synthetic fibers such as polyester fabric, nylon fabric, or natural fibers such as cotton, hemp, and the like made by applying a resin other than polyurethane on the base layer It consists of a polyurethane coating layer and the 1st, 2nd mixed polyurethane coating layer formed separately on the non-polyurethane coating layer.

Figure 4 is a fourth embodiment according to the present invention, a base layer made of synthetic fibers, such as polyester fabrics, nylon fabrics, or natural fibers such as cotton, hemp, and resins other than polyurethane resins and polyurethane resins on the base layer A mixed polyurethane coating layer made by applying a coating, a non-polyurethane coating layer made by applying a non-polyurethane resin on the mixed polyurethane coating layer, and a polyurethane made by applying a polyurethane resin on the non-polyurethane coating layer It consists of a urethane coating layer.

Herein, the resins other than polyurethane include acrylic resins, EVA resins, polyethylene resins, polypropylene resins, polyester resins, natural rubbers, SBR rubbers, NBR rubbers, Neoprene rubber, polyvinyl acetate-based resins, ABS resins, PVC resins and poly acrylonitrile resins may be used alone or in combination.

In this case, in order to increase durability of the resin or the like, an antioxidant, an ultraviolet absorber, a polymer stabilizer, or the like may be added.

In addition, an inorganic filler may be blended to increase the absorbency of the ink and to increase the dimensional stability and processability. At this time, the inorganic filler used is an inorganic powder having a particle size of 8μ or less, calcium carbonate, magnesium carbonate, clay, synthetic amorphous silica, aluminum silicate, magnesium silicate, calcium silicate, aluminum hydroxide, lidopone, zeolite, barium sulfate, titanium dioxide, Zinc carbonate, zinc oxide, zinc sulfate, talc and the like can be used.

Next, the present invention will be described in more detail with reference to the above examples, and the performance thereof will be evaluated based on the drying speed, ink spreadability, and sharpness.

Example 1

In terms of solid content, 25 parts by weight of acrylic resin, 20 parts by weight of magnesium carbonate, and 1 part by weight of ultraviolet absorber are mixed well with 100 parts of polyurethane (urethan) resin, and 50 ± 5 g / m 2 is applied on the polyester synthetic fiber. Create specimens of the same structure.

Example 2

In terms of solid content, 40 parts by weight of calcium carbonate was mixed well with 100 parts by weight of acrylic resin, and then 30 ± 5 g / m 2 was applied onto polyester synthetic fiber. 5g / ㎡ is applied to make a specimen of the structure as shown in FIG.

Example 3

After mixing 40 parts by weight of talc to 100 parts of acrylic resin in terms of solid content, apply 25 ± 5 g / m 2 to one side of polyester synthetic fiber, and then 80 parts by weight of acrylic resin and 100 parts of calcium carbonate to 100 parts of polyurethane resin. After mixing well by weight 20 ± 5g / m2, and then 20 parts by weight of talc and 100 parts by weight of the polyurethane resin was mixed well with 1 part by weight of the ultraviolet absorber to apply 20 ± 5g / m2 and the structure of the structure as shown in FIG. Make a Psalm

Comparative Example 1

20 parts by weight of CaCO ₃ is mixed well with 100 parts by weight of acrylic resin and 60 ± 5 g / m ³ is applied on the polyester synthetic islands.

When the performance of the above embodiments are evaluated based on the comparative example, it is as follows.

Drying speed Ink spreadability Sharpness Example 1 △ ◎ ○ Example 2 ○ ◎ ◎ Example 3 ◎ ◎ ◎ Comparative Example 1 ○ × ×

<◎: Outstanding ○: Excellent △: Normal X: Bad>

The definition of the evaluation item is as follows.

1.Drying speed: DGI VISTA JET 92 Time after printing with oil-based ink until no ink comes out.

2. Ink spreadability: Ink smearing after printing with DGI VISTA JET 92 oily ink.

3. Sharpness: The clarity and color development of the printout after printing with DGI VISTA JET 92 oil-based ink.

Inkjet media according to the present invention has excellent durability in the oil-based inkjet printing method can be applied to all materials, there is an effect that can expect a high resolution at low cost and output.

Claims (8)

(a) a base layer which is a fabric woven from at least one of synthetic fibers and natural fibers; And On the base layer (b-1) a polyurethane coating layer coated with a polyurethane resin, or (b-2) acrylic resin, EVA resin, polyethylene resin, polypropylene resin, polyester resin, natural rubber, SBR rubber, NBR rubber, neoprene rubber, A first mixed polyurethane coating layer applied by mixing a polyurethane resin with a resin made of one or more of a polyvinyl acetate resin, an ABS resin, a PVC resin, and a polyacrylonitrile resin; And oil-based ink is printed on the surface of the polyurethane coating layer or the first mixed polyurethane coating layer. The method according to claim 1, between the base material layer (a) and the polyurethane coating layer (b-1) or the first mixed polyurethane coating layer (b-2). (c) Acrylic resin, EVA resin, polyethylene resin, polypropylene resin, polyester resin, natural rubber, SBR rubber, NBR rubber, neoprene rubber, polyvinyl A second mixed polyurethane coating layer coated with a polyurethane resin mixed with a resin made of one or more of an acetate resin, an ABS resin, a PVC resin, and a polyacrylonitrile resin alone or in a mixture; or (d) Acrylic resin, EVA resin, polyethylene resin, polypropylene resin, polyester resin, natural rubber, SBR rubber, NBR rubber, neoprene rubber, polyvinyl A non-polyurethane coating layer coated with a resin made of one or more of an acetate resin, an ABS resin, a PVC resin, and a polyacrylonitrile resin; Oil-based inkjet media, characterized in that one or more layers are provided. delete The method according to claim 1 or 2, wherein the first mixed polyurethane coating layer, 70-130 parts by weight of polyurethane resin, 10-40 parts by weight of acrylic resin with a resin other than polyurethane resin, and 5-30 parts by weight of magnesium carbonate and 0-5 parts by weight of ultraviolet absorber as additives. media. The said 1st mixed polyurethane application layer of Claim 1 or 2, An oil-based inkjet media comprising 70 to 130 parts by weight of a polyurethane resin, 5 to 40 parts by weight of talc with a resin other than the polyurethane resin, and 0 to 5 parts by weight of an ultraviolet absorber as an additive. The said 2nd mixed polyurethane coating layer is a thing of Claim 1 or 2, 70 to 130 parts by weight of polyurethane resin, 60 to 100 parts by weight of acrylic resin with resin other than polyurethane resin, and 70 to 130 parts by weight of calcium carbonate as an additive. The method of claim 2, wherein the non-polyurethane coating layer, An oil-based inkjet media containing 70 to 130 parts by weight of an acrylic resin and 20 to 60 parts by weight of calcium carbonate. The method of claim 2, wherein the non-polyurethane coating layer, An oil-based inkjet media containing 70 to 130 parts by weight of acrylic resin and 15 to 55 parts by weight of talc.

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