KR100936294B1 - Polyolefin sheet for photograph printing - Google Patents

Abstract

PURPOSE: A polyolefin sheet for real-photo printing is provided to improve bonding, printing clearness, workability and weatherability, and to prevent production of harmful materials and environment hormone efficiently. CONSTITUTION: A polyolefin sheet for real-photo printing includes a core material layer(10), a fabric layer(20), a polyolefin-based primer layer(30), and an ink media layer(40). The core material layer is made with synthetic resin. The fabric layer is formed on both ends of the core layer, and made with polyolefin. The polyolefin-based primer layer is formed on a side of the fabric. The ink media layer is formed on a side of the primer layer. The core layer is yarn fiber or a mesh net. The yarn fiber is made of polyethylene and polypropylene.

Description

POLYOLEFIN SHEET FOR PHOTOGRAPH PRINTING}

The present invention relates to a polyolefin sheet for live action printing, and more particularly, is used for live printing using an inkjet print, and includes a core material layer, a fabric layer, a polyolefin-based primer layer, and an ink media layer.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a polyolepin sheet for photorealistic printing used for photorealistic printing using an inkjet print.

With the growing interest in the environment and the increasing need for health, the development of eco-friendly and non-toxic materials is being actively developed in developed countries such as the European Union and the United States.

The polyolefin sheet for actual printing used in the past has used polyvinyl chloride and fibers as main materials which can meet all of these conditions in consideration of processability, print adhesion and economical efficiency.

However, these polyvinyl chlorides are released from environmental hormones, and since the sheets made of fibers cannot be recycled and have to be disposed of by incineration, there has been a big problem of costly loss and new industrial waste.

In addition, harmful gases such as dioxin and halogen gas are generated in the process of incineration and disposal of sheets, which not only damages the human body but also restricts the use of polyvinyl chloride as part of environmental pollution regulation in advanced countries. There was a problem that the city is expected to receive the formulation.

In order to solve this problem, it is possible to manufacture a sheet for due diligence printing using polyolefin which is recyclable and does not emit harmful substances.

SUMMARY OF THE INVENTION An object of the present invention is to provide a photorealistic printing sheet that is excellent in printability, ink adhesion, print sharpness, processability and weather resistance, and does not emit harmful substances such as environmental hormones or harmful gases.

Another object of the present invention is to provide a live-printing sheet capable of recycling, which is environmentally friendly and excellent in economy.

An object of the present invention is a core material layer made of a synthetic resin, formed on both sides of the core material layer and formed of polyolefin, a polyolefin-based primer layer formed on one side of the fabric layer and the ink media formed on one surface of the primer layer It is achieved by providing a polyolefin sheet for yarn prints, comprising a layer.

According to a preferred feature of the invention, the core layer is to be a yarn fiber made of polyethylene and polypropylene or a mesh network made of polyethylene and polypropylene.

According to a more preferred feature of the invention, the polyolefin is polyethylene, polypropylene, propylene ethylene copolymer, propylene butene copolymer, ethylene alpha olefin copolymer, ethylene acrylate copolymer, ethylene acrylic acid copolymer, ethylene anhydride And at least one selected from the group consisting of coalescing and ethylene vinyl acetate.

According to a more preferred feature of the invention, the polyolefin primer is to comprise 100 parts by weight of the molten resin in which the polyolefin resin having a polar group dissolved in a volatile solvent, 30 to 40 parts by weight of acrylic resin and 0.05 to 0.3 parts by weight of wetting agent. do.

According to an even more preferable feature of the present invention, the ink media layer is 100 parts by weight of a molten resin obtained by melting at least one resin selected from the group consisting of a polyolefin resin, an acrylic resin, an epoxy resin and a urethane resin having a polar group with a volatile solvent, It shall consist of 3-5 weight part of silicas, 0.1-1.0 weight part of antioxidant, and 0.2-2.0 weight part of ultraviolet stabilizers.

According to a still further preferred feature of the invention, the silica has a particle size of 3 to 10 micrometers.

According to a still further preferred feature of the invention, the antioxidant is pentarisrititol tetrakis (3- (3,5-di-thi-butyl-4-hydroxyphenylpropinate), 3,5-di-ti- Butyl-4-hydroxyhydrocinnamate octadecyl, tris (2,4-di-thi-butylphenyl) phosphite and 1,2-bis (3,5-di-thi-butyl-4-hydroxyhydrocinna Moyl) hydrazine, including one selected from the group consisting of.

According to a further preferred feature of the invention, the UV stabilizer is benzophenone, bis (2,2,6,6-tetramethyl-4-piperidine sebacate), [(2-2-hydroxy-3 ' -T-butyl-5'- methylphenyl) -5-chlorobenzotriazole] and 9 [2 (2'-hydroxy-3 ', 5'-di-thi-butylphenyl) -5-chlorobenzotriazole] It is to include one selected from the group consisting of.

The polyolefin sheet for actual printing according to the present invention exhibits excellent effects excellent in printability, ink adhesion, print sharpness, processability and weatherability.

Moreover, it shows the outstanding effect that dioxin, a halogen gas, etc. do not generate | occur | produce at the time of environmental hormone or incineration.

In addition, it is recyclable, environmentally friendly, and has an excellent economic efficiency.

Hereinafter, the preferred embodiments of the present invention and the physical properties of each component will be described in detail, which is intended to explain in detail enough to be able to easily carry out the invention by one of ordinary skill in the art, This does not mean that the technical spirit and scope of the present invention is limited.

The polyolefin sheet for yarn print according to the present invention is formed on both sides of the core layer (10, 10-1) of the above-described core layer (10, 10-1) made of synthetic resin and made of a polyolefin fabric layer 20, as described above It comprises a polyolefin-based primer layer 30 formed on one surface of one of the fabric layer 20 and the ink media layer 40 formed on one surface of the primer layer 30 described above.

The core layer (10, 10-1) is made of synthetic resin, it is used in the form of a yarn fiber (10-1) made of polyethylene and polypropylene or a mesh network (10) made of polyethylene and polypropylene.

The core layer (10, 10-1) serves to hold easily so as not to be damaged by external force even if the thickness of the above-described fabric layer 20 is thin, and serves to prevent the sheet from twisting when performing the due diligence print. do.

The above-described fabric layer 20 is formed on both sides of the above-described core layer (10, 10-1) and made of polyolefin, the above-described polyolefin is polyethylene, polypropylene, propylene ethylene copolymer, propylene butene copolymer, ethylene alpha It comprises at least one selected from the group consisting of olefin copolymer, ethylene acrylate copolymer, ethylene acrylic acid copolymer, ethylene melanic anhydride copolymer and ethylene vinyl acetate.

The above-described raw material layer 20 forms the above-described polyolefin on both sides of the above-described core material layers 10 and 10-1 through T-Die of an extruder at 250 to 350 ° C.

In this case, the melt index of the polyolefin (Melt Index, ASTM D1238, g / 10min) is preferably 5 to 15, when the melt index is less than 5, when the extrusion coating is performed, the discharge amount is small and the extruder is overloaded, resulting in high productivity Falling, because the flow of the polyolefin passed through the T-die is not even shearing occurs a continuous coating process is difficult, the coating is not even, the surface of the fabric layer 20 is formed rough.

On the other hand, if the melt index exceeds 15, the flowability is excessively increased and the viscosity is lowered, so that uniform extrusion coating is difficult.

In addition, the melting temperature of the polyolefin is preferably 100 to 150 ℃, if the melting point is less than 100 ℃ heat resistance during the extrusion coating is discolored, if it exceeds 150 ℃ to generate high heat, energy efficiency is Deterioration, the adhesive force with the core layer (10, 10-1) can be reduced.

A primer layer 30 is formed on one surface of one of the fabric layers 20, and one surface of the fabric layer 20 on which the primer layer 30 is formed is subjected to electric corona treatment at 40 to 60 dyne / cm ² . Improves adhesion with

The above-described primer layer 30 is formed on one surface of the above-described fabric layer 20, serves to improve the adhesion between the fabric layer 20 and the ink media layer 40, using a polyolefin-based primer It is done by

The aforementioned polyolefin primer comprises 100 parts by weight of a molten resin in which a polyolefin resin having a polar group is dissolved in a volatile solvent, 30 to 40 parts by weight of an acrylic resin, and 0.05 to 0.3 parts by weight of a wetting agent.

The above-mentioned volatile solvent can be used as long as there is no volatile solvent such as toluene, cyclohexane, xylene, and methyl ethyl ketone, and no residual solvent is used. Do.

As the humectant, humectants such as glycerin, propylene glycol, and sorbitol, which are generally used, may be used, and typically, a polyester-modified dimethylpolysiloxane system is used. ) Helps to form.

The above-described primer layer 30 is formed by using gravure mesh roll on one surface of the corona treated fabric layer 20, the viscosity is preferably 100cps (25 ℃) or less, the thickness of the coating gravure mesh As a reference, 90 to 100 mesh is suitable, and about 10 μm is appropriate as a humidity film.

After applying the above-described polyolefin-based primer to the fabric layer 20, after drying for 30 seconds at a temperature of 80 ℃ and aged in a rolling state (Rolling) to use the fabric layer 20 and the ink media layer ( The adhesion between the 40 is further enhanced.

The above-described ink media layer 40 is formed on one surface of the above-described primer layer 30, and melted with a volatile solvent by melting at least one resin selected from the group consisting of a polyolefin resin, an acrylic resin, an epoxy resin, and a urethane resin having a polar group. 3 to 5 parts by weight of silica, 0.1 to 1.0 part by weight of antioxidant and 0.2 to 2.0 parts by weight of UV stabilizer are added to 100 parts by weight of the resin.

The above-described ink media layer 40 is coated with a humidity film of 20 to 30㎛, if the thickness of the coating exceeds 30㎛ print quality is improved, but the economical efficiency is lowered, if it exceeds 50㎛ the swelling phenomenon Occurs.

 In addition, when the thickness is less than 20 μm, the dryness of the ink is lowered, which causes bleeding of the ink.

The above-described ink media layer 40 has a solid content of 20 to 30%, the viscosity is preferably 60 to 100cps at 25 ℃ when coated with a mesh roll, the viscosity is more than 100cps when applying a commer coater method It is preferable.

The above-mentioned volatile solvent can be used as long as it has a high volatility such as toluene, cyclohexane and xylene and no residual solvent remains.

Since the silica described above improves the adhesion of the ink and greatly affects the drying of the ink after the actual printing, it is preferable to use silica having a particle size of 3 to 10 µm and having a high oil absorption to give accuracy and clarity of printing. Do.

The above-mentioned antioxidants include pentarisrititol tetrakis (3- (3,5-di-thi-butyl-4-hydroxyphenylpropinate), 3,5-di-thi-butyl-4-hydroxyhydrocinnamate One selected from the group consisting of octadecyl, tris (2,4-di-thi-butylphenyl) phosphite and 1,2-bis (3,5-di-thi-butyl-4-hydroxyhydrocinnamoyl) hydrazine It comprises a, to prevent the ink media layer 40 discoloration and aging due to sunlight, serves to improve weather resistance and light resistance.

The above-mentioned ultraviolet stabilizers include benzophenone, bis (2,2,6,6-tetramethyl-4-piperidine sebacate), [(2-2-hydroxy-3'-thi-butyl-5'-methylphenyl ) -5-chlorobenzotriazole] and 9 [2 (2'-hydroxy-3 ', 5'-di-thi-butylphenyl) -5-chlorobenzotriazole] It is made, by stabilizing by blocking the change in the physical properties of the ink media layer 40 due to ultraviolet rays, to prevent discoloration and aging, serves to improve weather resistance and light resistance.

Hereinafter, the production method and physical property test results of the polyolefin sheet for the due diligence print according to the present invention will be described with reference to Examples.

<Example 1>

The core material layer 10-1 is formed of yarn fibers made of polyethylene and polypropylene, and the low density polyethylene resin is extruded at 320 ° C. using a T-die to have a thickness of 75 μm on both sides of the core material layer 10-1. Extrusion coating using to form the fabric layer 20, one side of the fabric layer 20 of the electrical corona treatment at 50 dyne / cm ² , the polyolefin system having a polar group on the corona treated fabric layer 20 100 mesh polyolefin primer consisting of 30 to 40 parts by weight of acrylic resin and 0.15 parts of wetting agent to 100 parts by weight of a molten resin prepared by dissolving a resin in a volatile solvent formed by mixing 60 parts by weight of toluene and 40 parts by weight of methyl ethyl ketone. Applying a roll with a moisture film thickness of 10㎛ using a roll to dry for 30 seconds at 80 ℃ to form a primer layer 30, the polyolefin resin having a polar group in the above-described primer layer 30 An ink media layer 40 formed by adding 4 parts by weight of silica, 0.5 parts by weight of antioxidant, and 1.0 parts by weight of UV stabilizer to 100 parts by weight of the molten resin melted with the solvent was formed to produce a polyolefin sheet for actual printing. And inkjet printing was performed.

<Example 2>

Proceeding in the same manner as in Example 1, the ink media layer 40 was formed to a thickness of 10 μm to prepare a polyolefin sheet for actual printing, and inkjet printing was performed.

<Example 3>

Proceed in the same manner as in Example 1, the core layer 10 was formed of a mesh network made of polyethylene and polypropylene to produce a polyolefin sheet for the due diligence printing, and inkjet printing was performed.

<Example 4>

Proceed in the same manner as in Example 1, using the T-die so as to have a thickness of 50㎛ on both sides of the core layer (10-1) by extrusion coating the propylene ethylene copolymer resin using an extruder at 330 ℃ fabric layer (20) ) Was formed to produce a polyolefin sheet for actual printing, and inkjet printing was performed.

Example 5

Proceed in the same manner as in Example 1, using the T-die to extrude the propylene ethylene copolymer resin using an extruder at 330 ℃ to form a thickness of 50㎛ on both sides of the core layer (10-1) to form a fabric layer Then, the thickness of the ink media layer 40 was formed to 15 µm to produce a polyolefin sheet for actual printing, and inkjet printing was performed.

Physical property test results of the polyolefin for due diligence prints prepared through Examples 1 to 5 are shown in Table 1 below.

However, the print adhesiveness is that if the Scotch 600 tape is attached to the printing surface after the US 3M Scotch 600 tape is attached to the printing surface, whether the printing surface is buried on the tape, and the surface is contacted with the printing surface at room temperature to 10 Lb / cm ² . When pressing and separating, the printing surface is damaged. When contacting the printing surface and printing surface at 37 ℃, press down at 10Lb / cm ² and then remove it after 2 hours. However, if it is not satisfactory, it is classified as bad.

The print dryness was classified into good and bad according to whether or not the ink was dried on the printing surface in the state where the live printing was completed.

Print clarity and accuracy were shown as good and bad, depending on whether the dropping ink was dropped in the unit of printing by dot space measurement method and whether the ink bleeding or diffusion range was within the 0.1mm ± 0.01mm range.

TABLE 1

As shown in Table 1 above, the polyolefin sheet for actual printing according to the present invention exhibits excellent physical properties in both print adhesion and print sharpness.

In addition, it can be seen that when the thickness of the ink media layer is 20 µm or more, print dryness and print accuracy are improved.

1 is an exploded perspective view showing a polyolefin sheet for photorealistic printing according to an exemplary embodiment of the present invention.

Figure 2 is an exploded perspective view showing a polyolefin sheet for photorealistic printing in another embodiment according to the present invention.

*** Description of the main parts of the drawings ***

10; Heartwood

10-1; Heartwood

20; Fabric layer

30; Primer layer

40; Ink media layer

Claims (8)

Core material layer made of synthetic resin; A fabric layer formed on both sides of the core layer and made of polyolefin; A polyolefin primer layer formed on one surface of the fabric layer; And It is made, including; ink media layer formed on one surface of the primer layer, The core layer is yarn yarn made of polyethylene and polypropylene or polyolefin sheet for yarn prints, characterized in that the mesh network made of polyethylene and polypropylene. delete The method according to claim 1, The polyolefin of the fabric layer is composed of polyethylene, polypropylene, propylene ethylene copolymer, propylene butene copolymer, ethylene alpha olefin copolymer, ethylene acrylate copolymer, ethylene acrylic acid copolymer, ethylene anhydrous melanic acid copolymer and ethylene vinyl acetate A polyolefin sheet for actual printing, comprising at least one selected from the group. The method according to claim 1, The polyolefin primer comprises 100 parts by weight of the molten resin in which the polar polyolefin-based resin is dissolved in a volatile solvent, 30 to 40 parts by weight of acrylic resin and 0.05 to 0.3 parts by weight of a wetting agent. The method according to claim 1, The ink media layer is a polar group of polyolefin resin, acrylic resin, epoxy resin and urethane resin at least one resin selected from the group consisting of molten resin molten by volatile solvent, 3 to 5 parts by weight of silica, antioxidant 0.1 To 1.0 part by weight and 0.2 to 2.0 parts by weight of the UV stabilizer, characterized in that the polyolefin sheet for printing. The method according to claim 5, The silica is a polyolefin sheet for yarn printing, characterized in that the particle size of 3 to 10 micrometers. The method according to claim 5, The antioxidant is pentaristhritol tetrakis (3- (3,5-di-thi-butyl-4-hydroxyphenylpropinate), 3,5-di-thi-butyl-4-hydroxyhydrocinnamate octa One selected from the group consisting of decyl, tris (2,4-di-thi-butylphenyl) phosphite and 1,2-bis (3,5-di-thi-butyl-4-hydroxyhydrocinnamoyl) hydrazine The polyolefin sheet for actual printing, which comprises a. The method according to claim 5, The UV stabilizers include benzophenone, bis (2,2,6,6-tetramethyl-4-piperidine sebacate), [(2-2-hydroxy-3'-thi-butyl-5'-methylphenyl) -5-chlorobenzotriazole] and 9 [2 (2'-hydroxy-3 ', 5'-di-thi-butylphenyl) -5-chlorobenzotriazole] A polyolefin sheet for actual printing, characterized in that the.

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