KR102151165B1 - The method for preparing packing film using environment_friendly aqueous ink and film prepared thereby - Google Patents

Abstract

The present invention relates to a packing film using environmentally-friendly ink for an aqueous laminate to remove risk of environmental pollution and damage to a human body, and a manufacturing method of the packing film. According to the present invention, the method comprises: a first step of performing a gravure printing process using an environmentally-friendly ink composition for an aqueous laminate on one surface of a first film through a roll-to-roll method; a second step of coating an adhesive on the printed first film and drying the adhesive; and a third step of laminating a second film on the first film. The first step performs the gravure printing process with a copper plate having the number of lines of 220 and 230 and an engraving depth of 12-15 μm.

Description

Packaging film manufacturing method using eco-friendly ink for water-based laminate and packaging film manufactured therefrom {THE METHOD FOR PREPARING PACKING FILM USING ENVIRONMENT_FRIENDLY AQUEOUS INK AND FILM PREPARED THEREBY}

The present invention relates to a method for manufacturing a packaging film using eco-friendly ink for aqueous laminates and to a packaging film manufactured therefrom.

Conventional packaging films were manufactured through a gravure printing process using ink containing VOC-regulated substances such as Toluene, MKE, EA, and IPA and also used as a diluent.

As such gravure printing inks are manufactured using VOC regulated substances, they not only cause environmental pollution, but also have a harmful effect on the human body, resulting in a poor working environment.

In addition, alcohol used as a diluent has a low flash point, so there is a risk of fire during the manufacturing process, and there is a disadvantage of increasing ink manufacturing cost.

Accordingly, there is a need for a method of manufacturing a packaging film that is safe, and has no risk of harming the human body and environmental pollution.

It is an object of the present invention to provide a method for manufacturing a packaging film using eco-friendly ink for aqueous laminates without risk of environmental pollution and harm to the human body, and a packaging film manufactured therefrom.

Another object of the present invention is to provide a packaging film manufacturing method using eco-friendly ink for aqueous laminates that can provide a safe working environment and a packaging film manufactured therefrom.

Another object of the present invention is to provide a packaging film manufacturing method using eco-friendly ink for aqueous laminates capable of lowering manufacturing costs and a packaging film manufactured therefrom.

All of the above and other objects of the present invention can be achieved by the present invention described below.

One aspect of the present invention relates to a method for manufacturing a packaging film using eco-friendly ink for aqueous laminates.

According to one embodiment, the method of manufacturing a packaging film using eco-friendly ink for water-based laminate comprises: a first step of performing a gravure printing process in a roll-to-roll method of an eco-friendly ink composition for water-based laminate on one side of the first film; A second step of applying and drying an adhesive on the printed first film; A third step of laminating a second film on the first film; and in the first step, a gravure printing process is performed with a copper plate having a bow length of 220 to 230 and a engraving depth of 12 μm to 15 μm. do.

Here, in the first step, the drying chamber temperature is 85°C or higher, the cooling roller is an anodized spiral groove type cooling roller, and the gravure printing process may be performed at a cooling water temperature of 18.5°C to 22°C.

In the first step, the angle between the printed copper plate and the doctor blade is 60° to 65°, the cell wall height of the printed copper plate for each color is 9 μm to 14 μm, and the air volume provided to the drying box is 55 CMM. A gravure printing process may be performed with to 75CMM.

The eco-friendly ink composition for aqueous laminates may include 20 to 25 parts by weight of water, based on 100 parts by weight of the ink composition.

In addition, the eco-friendly ink composition for the aqueous laminate is based on 100 parts by weight, 8 to 14 parts by weight of an aqueous acrylic resin; 10 to 16 parts by weight of pigment; 33 to 39 parts by weight of an aqueous urethane resin; 3 to 6 parts by weight of auxiliary resin; 6 to 12 parts by weight of ethanol; 20 to 25 parts by weight of water; And 1 to 5 parts by weight of additives; may include.

In addition, the eco-friendly ink composition for aqueous laminate may have a weight ratio of ethanol and water of 1:2 to 1:3.

The adhesive may include a solvent-free type of urethane-based polyester, and a curing agent may be included in an amount of 60 to 65 parts by weight based on 100 parts by weight of the adhesive.

In addition, drying in the second step may be cured at 45°C or higher.

Another aspect of the present invention relates to a packaging film using eco-friendly ink for aqueous laminates.

According to one embodiment, the packaging film using the eco-friendly ink for water-based laminate includes a first film on which the eco-friendly ink composition for water-based laminate is printed on at least one side; An adhesive layer applied on the first film; And a second film laminated on the adhesive layer, wherein the printing may be printed using a copper plate having a bow length of 220 to 230 and a engraving depth of 12 μm to 15 μm.

Here, the eco-friendly ink composition for the aqueous laminate is based on 100 parts by weight, 8 to 14 parts by weight of a water-based acrylic resin; 10 to 16 parts by weight of pigment; 33 to 39 parts by weight of an aqueous urethane resin; 3 to 6 parts by weight of auxiliary resin; 6 to 12 parts by weight of ethanol; 20 to 25 parts by weight of water; And 1 to 5 parts by weight of additives; may include.

In another embodiment, the method of manufacturing a packaging film using eco-friendly ink for water-based laminate includes: a first step of performing a gravure printing process in a roll-to-roll manner with an eco-friendly ink composition for water-based laminate on one side of the first film; A second step of applying a coating agent to the printed first film; A third step of forming a second film by melt-extruding a resin through a T-die on the first film to which the coating agent is applied; And a fourth step of laminating a third film on the second film, wherein the first step is a gravure printing process with a copper plate having a bow length of 220 to 230 and a engraving depth of 12 μm to 15 μm. It may be to perform.

Here, the eco-friendly ink composition for the aqueous laminate is based on 100 parts by weight, 8 to 14 parts by weight of a water-based acrylic resin; 10 to 16 parts by weight of pigment; 33 to 39 parts by weight of an aqueous urethane resin; 3 to 6 parts by weight of auxiliary resin; 6 to 12 parts by weight of ethanol; 20 to 25 parts by weight of water; And 1 to 5 parts by weight of additives; may include.

The coating agent may be an aqueous type anchor coating of imine heat.

In addition, in the melt extrusion of the third step, the interval between the extrusion die and the cooling roll is 185mm to 215mm, and the temperature of the extrusion die is 315°C to 325°C, and sand having a size of 80 mesh to 100 mesh is used. Eggplanting can be performed by a cooling roll including a mat type roll. The temperature of the extrusion die may be specifically 320°C.

In addition, in the fourth step, the diameter of the silicon pressure roll used for bonding the cooling roll and the film may be 215mm to 225mm, and the contact distance between the cooling roll and the film may be 1450mm to 1600mm. The diameter of the silicone pressure roll may be 220mm.

In another embodiment, the packaging film using the eco-friendly ink for water-based laminate includes a first film on which the eco-friendly ink composition for water-based laminate is printed on at least one side; A coating layer applied on the first film; A second film formed by melt-extruding a resin through a T-die on the first film coated with the coating agent; And a third film laminated on the second film, wherein the printing may be printed using a copper plate having a length of 220 to 230 and a depth of engraving of 12 μm to 15 μm.

Here, the eco-friendly ink composition for the aqueous laminate is based on 100 parts by weight, 8 to 14 parts by weight of a water-based acrylic resin; 10 to 16 parts by weight of pigment; 33 to 39 parts by weight of an aqueous urethane resin; 3 to 6 parts by weight of auxiliary resin; 6 to 12 parts by weight of ethanol; 20 to 25 parts by weight of water; And 1 to 5 parts by weight of additives; may include.

In another embodiment, the packaging film using eco-friendly ink for aqueous laminate further includes a fourth film laminated on the third film, and the fourth film forms a resin layer by melt-extrusion of a resin through the T-die. It may be laminated after one.

The present invention has an effect of providing a hollow fiber membrane having excellent mechanical strength and water permeability and a method for manufacturing the same.

1 is a flow chart briefly showing a packaging film manufacturing method using eco-friendly ink for aqueous laminates according to an embodiment of the present invention.
Figure 2 is a schematic cross-sectional view of a packaging film using eco-friendly ink for aqueous laminates according to an embodiment of the present invention.
3 is a flowchart showing a simple method of manufacturing a packaging film using eco-friendly ink for aqueous laminates according to another embodiment of the present invention.
4 is a simplified cross-sectional view of a packaging film using eco-friendly ink for aqueous laminates according to another embodiment of the present invention.
5 is a schematic cross-sectional view of a packaging film using eco-friendly ink for aqueous laminates according to another embodiment of the present invention.

Hereinafter, specific examples of the present application will be described in more detail with reference to the accompanying drawings. However, the technology disclosed in the present application is not limited to the specific examples described herein and may be embodied in other forms.

However, the embodiments introduced herein are provided so that the disclosed content may be thorough and complete, and the spirit of the present application may be sufficiently conveyed to those skilled in the art. In the drawings, in order to clearly express the constituent elements of each device, the size of the constituent elements, such as width or thickness, is slightly enlarged. In addition, although only some of the components are shown for convenience of description, those skilled in the art will be able to easily grasp the remaining parts of the components.

When it is described as a whole from the observer's point of view when describing the drawings, and when one element is referred to as being positioned above or below another element, this means that the element is positioned directly above or below another element, or an additional element between those elements. It includes all meanings that can be intervened. In addition, those of ordinary skill in the relevant field will be able to implement the spirit of the present application in various other forms without departing from the technical spirit of the present application. In addition, the same reference numerals in the plurality of drawings refer to substantially the same elements.

Meanwhile, the singular expression described in the present application should be understood as including a plurality of expressions, unless the context clearly indicates otherwise, and terms such as'include' or'have' are described features, numbers, steps, To designate presence in an action, component, part, or combination thereof, but precludes the possibility of the presence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. It should be understood as not.

In addition, in this specification,'X to Y'indicating a range means'X or more and Y or less'.

Packaging film manufacturing method using eco-friendly ink for water-based laminate (Dry Lamination)

A method of manufacturing a packaging film using eco-friendly ink for aqueous laminates according to an embodiment of the present invention will be described with reference to FIG. 1. 1 is a flow chart briefly showing a packaging film manufacturing method using eco-friendly ink for aqueous laminates according to an embodiment of the present invention.

Referring to FIG. 1, the method of manufacturing a packaging film using eco-friendly ink for water-based laminate includes: a first step of performing a gravure printing process in a roll-to-roll method with an eco-friendly ink composition for water-based laminate on one side of a first film; A second step of applying and drying an adhesive on the printed first film; A third step of laminating a second film on the first film; and in the first step, a gravure printing process is performed with a copper plate having a bow length of 220 to 230 and a engraving depth of 12 μm to 15 μm. do.

The first film may include at least one of oriented polypropylene (OPP), polyethylene terephthalate (PET), NY, TP, and PAPER. In addition, the first film is not limited to the material, and in addition to the material, an eco-friendly ink for water-based laminate may be applied in the case of a material or substrate capable of gravure printing in a roll-to-roll method.

The eco-friendly ink composition for the aqueous laminate is based on 100 parts by weight, 8 to 14 parts by weight of a water-based acrylic resin; 10 to 16 parts by weight of pigment; 33 to 39 parts by weight of an aqueous urethane resin; 3 to 6 parts by weight of auxiliary resin; 6 to 12 parts by weight of ethanol; 20 to 25 parts by weight of water; And 1 to 5 parts by weight of additives; may include.

The eco-friendly ink composition for aqueous laminates does not use any VOC-regulated substances, and is a one-component type, and does not use a curing agent, so it has an eco-friendly advantage. In addition, since the eco-friendly ink composition for aqueous laminate does not use a curing agent, it is possible to reuse the remaining ink after printing.

The aqueous acrylic resin serves to provide excellent pigment dispersing power. In particular, the eco-friendly ink composition for aqueous laminates of the present invention contains a specific amount of water, and the aqueous acrylic resin has the advantage of not only having high solubility in water, but also excellent dispersing power of pigment in water, thereby reducing the amount of ink used. I can.

In addition, the water-based acrylic resin has excellent compatibility with water and is suitable for the eco-friendly ink composition for aqueous laminates of the present invention containing water, and lowers the ethanol content and may contain an excessive amount of water, thereby increasing the flash point, thereby increasing the risk of fire. Not only is it reduced, but it has the advantage of lowering the cost.

Specifically, the aqueous acrylic resin may be a resin formed from a monomer mixture containing methyl acrylate and acrylic acid. Specifically, the acrylic resin may be a resin formed from a monomer mixture that includes methyl acrylate and acrylic acid, and further includes at least one of hexyl acrylate and alkylvinylbenzene. For example, it may be an aqueous acrylic resin having one of the following Chemical Formulas 1 to 3, and the weight average molecular weight may be 5,000 to 15,000, specifically 8,000 to 12,000.

[Formula 1]

(In Formula 1, R is an alkyl group of C ₁ to C ₁₀ , specifically C ₄ to C ₈ , and 0.7≤a≤0.9, 0.05≤b≤0.15, 0.05≤c≤0.15, a+b+c=1 being).

[Formula 2]

(In Formula 2, R is an alkyl group of C ₁ to C ₁₀ , specifically C ₄ to C ₈ , and 0.7≤a≤0.9, 0.05≤b≤0.15, 0.05≤c≤0.15, a+b+c=1 being).

[Formula 3]

(In Formula 3, 0.7≤a≤0.9, 0.05≤b≤0.15, 0.05≤c≤0.15, a+b+c=1).

The water-based acrylic resin may be included in an amount of 8 to 14 parts by weight based on 100 parts by weight of an eco-friendly ink composition for an aqueous laminate. If the content of the aqueous acrylic resin is less than 8 parts by weight, the dispersing power of the pigment is lowered, and if it exceeds 14 parts by weight, the material cost is high and compatibility with other resins is poor.

The pigment serves as a colorant and may include an organic pigment, an inorganic pigment, and the like. The pigment may be included in an amount of 12 to 30 parts by weight based on 100 parts by weight of an eco-friendly ink composition for an aqueous laminate, and specifically, in the case of a colored pigment, 10 to 16 parts by weight may be included.

In another embodiment, when the pigment is a white pigment, 6 to 12 parts by weight of an aqueous acrylic resin; 25 to 31 parts by weight of pigment; 27 to 33 parts by weight of an aqueous urethane resin; 2 to 5 parts by weight of auxiliary resin; 5 to 10 parts by weight of ethanol; 15 to 20 parts by weight of water; And 1 to 4 parts by weight of additives; may include.

The colored pigment is a low-viscosity type and has a high concentration and a high pigment content to prevent blocking, but the price is high and the adhesion to the printed material is low, and the white pigment has excellent hiding power and whiteness, but the price is high, and The adhesion to prints is weak. Also, when time elapses, poor storage may occur.

The water-based urethane resin can be adhered to many materials, has little residual solvent, and has excellent film performance such as laminate processability, content resistance (oil, vinegar, fragrance), and retort resistance, so it is the most common resin for general-purpose laminate inks. Used.

Specifically, the aqueous urethane resin is a self-curing type 　 urethane 　 resin prepared by reacting urea and a silane coupling agent in order not to use a curing agent.

Below is the reaction mechanism for manufacturing self-curing type 　 urethane 　 resin.

1) 　 Urethane (URETHANE) reaction

OCN-R-NCO + HO-R'-OH → OCN-R-NHCOO-R'-OH

2) Urea reaction

OCN-R-NCO + H ₂ N-R'NH ₂ → OCN-R-NHCONH-R-NH ₂

3) Addition reaction of silane coupling agent

OCN-R-NHCONH-R-NH ₂ + NH ₂ (CH ₂ )3Si(OC ₂ H ₅ ) ₃ → ₂ HN-R-NHCONH-R-HNCOHN(CH ₂ )3Si(OC ₂ H ₅ ) ₃

The water-based urethane resin may be included in an amount of 33 to 39 parts by weight based on 100 parts by weight of an eco-friendly ink composition for an aqueous laminate. If the content of the aqueous urethane resin is less than 33 parts by weight, post-processing adhesion is lowered, and if it exceeds 39 parts by weight, drying may be delayed and blocking may occur, the printing roll may be contaminated, and manufacturing cost may increase.

The auxiliary resin serves to reinforce adhesion.

Specifically, CL-PP (propylene chlorinated) may be applied as the auxiliary resin.

The auxiliary resin may be included in an amount of 3 to 6 parts by weight, based on 100 parts by weight of an eco-friendly ink composition for aqueous laminates, and if it is less than 3 parts by weight, adhesion may be reduced.

The ethanol can increase the drying speed of the eco-friendly ink composition for aqueous laminates.

The ethanol may be included in an amount of 6 to 12 parts by weight, based on 100 parts by weight of the eco-friendly ink composition for aqueous laminates. When the content of ethanol is less than 6 parts by weight, drying is poor, and when it exceeds 12 parts by weight, the solid content is high and the raw material cost is increased.There is a disadvantage that the dispersing power of the pigment is deteriorated because the aqueous acrylic resin cannot be included in an excessive amount.

The water has excellent compatibility with the aqueous acrylic resin and the aqueous urethane resin, so that the pigment dispersing power of the aqueous acrylic resin is increased, thereby reducing the amount of ink used, and improving the adhesion of the aqueous urethane resin.

The water may be included in an amount of 20 to 25 parts by weight based on 100 parts by weight of the eco-friendly ink composition for aqueous laminates. If the content of the water is less than 20 parts by weight, the flash point may be low, thereby increasing the risk of fire, and if the content of the water exceeds 25 parts by weight, there is a concern that a drying failure of the ink composition may occur.

In particular, the ethanol of the present invention may contain an excess amount of water than ethanol in the eco-friendly ink composition for aqueous laminates, and specifically, the weight ratio of ethanol and water may be 1:2 to 1:3. In this case, there is an advantage of maximizing the pigment dispersing power of the aqueous acrylic resin, reducing the risk of fire by increasing the flash point, and lowering the manufacturing cost of the ink composition.

The additive plays a role of maintaining and imparting necessary physical properties to an eco-friendly ink composition for aqueous laminates such as scratch resistance and slip resistance.

Specifically, the additives are scratch resistant (wax), dispersant, film reinforcing agent (wax), anti-blocking agent (wax), anti-static agent (ammyonium salt), antifoaming agent (silicon-based), adhesion reinforcing agent (chlorinated polypropylene), heat-resistant reinforcing agent ( Cellulose) and a metastatic modifier (organic acid).

The additive may be included in an amount of 1 to 5 parts by weight based on 100 parts by weight of the eco-friendly ink composition for aqueous laminates. If the content of the additive is less than 1 part by weight, scratch resistance or required physical properties may be deteriorated.

For example, as the film reinforcing agent, Poly Ethylene Wax may be used, and it is used to impart activity to the ink film to prevent scratching, and SiO ₂ may be used as the blocking inhibitor, and the ink film surface is roughened. , It reduces adhesion and prevents blocking. However, if it is used a lot, caution is required because it may cause deterioration in gloss and poor appearance of the laminate. In addition, the anti-static agent is a surfactant, which lowers the electrical resistance of the ink, thereby auxiliaryly preventing electrostatic disturbance during printing.

In the first step, a gravure printing process is performed by applying the eco-friendly ink composition for aqueous laminate to one surface of the first film in a roll-to-roll method. Specifically, using a copper plate made of a concave plate by chemical corrosion and Helio, laser engraving, the eco-friendly ink composition for water-based laminate is contained in the dot, and the unnecessary eco-friendly ink composition of the remaining part is removed with a duct blade (a knife called Doctor). After that, a gravure printing process may be performed by compressing the first film using a rubber roll.

In the case of printing by applying the eco-friendly ink composition for aqueous laminates of the present invention, significantly higher defects in printing after the printing process 　 second film processing than printing using ink containing Toluene, MKE, EA (ink tearing phenomenon) ) May occur, because the drying state of the ink after printing is poor.

To solve this, the packaging film manufacturing method using the eco-friendly ink composition for aqueous laminates of the present invention should minimize the amount of ink applied.

In the first step of the present invention, by applying the eco-friendly ink composition for the aqueous laminate, the amount of ink used can be reduced, specifically, the bow is 220 to 230, and the engraving depth is 12 µm to 15 µm, specifically 13 µm to There is an advantage that the gravure printing process can be performed with a copper plate of 15 μm, more specifically 13 μm to 14 μm.

In the first step, in the first step, the drying chamber temperature is 85°C or higher, the cooling roller is an anodized spiral groove type cooling roller, and the gravure printing process can be performed at a cooling water temperature of 18.5°C to 22°C. have. In this case, there is an advantage of rapid drying of the ink composition.

In addition, in the first step, the gravure printing process may be performed at an angle of 60° to 65° between the printing copper plate and the doctor blade. In this case, it is possible to prevent a comb pattern or ink agglomeration on the printing surface.

In addition, the cell wall height of the printed copper plate for each color is 9 μm to 14 μm, specifically 9 μm to 12 μm, and the air volume provided to the drying box is 55 CMM to 75 CMM, and the gravure printing process may be performed. In this case, there is an advantage that the color difference value can be reduced to a certain level or less, and the drying speed of the ink composition is further improved.

In the second step, an adhesive is applied to the printed first film and dried.

The adhesive may include a solvent-free type of urethane-based polyester, and a curing agent may be included in an amount of 60 to 65 parts by weight based on 100 parts by weight of the adhesive. In addition, drying in the second step may be cured at 45°C or higher. In this case, the bubble phenomenon can be prevented and the curing speed can be improved.

In the third step, a second film is laminated on the first film coated and dried with the adhesive.

The 　 second film may be formed of a polypropylene non-stretched film (CPP), an aluminum evaporated non-stretched film (VM-CPP), a linear low density polyethylene (LLDPE), or the like.

The packaging film manufactured by the dry lamination method using eco-friendly ink for water-based laminates of the present invention uses a water-based acrylic resin, so that the amount of ink used can be reduced due to excellent pigment dispersibility, and water can be included as a solvent. There is an advantage in that it can prevent a fire hazard and lower the manufacturing cost.

Packaging film using eco-friendly ink for water-based laminate (Dry Lamination, DL)

Hereinafter, a packaging film using eco-friendly ink for water-based laminate, which is another aspect of the present invention, will be described with reference to FIG. 2. Figure 2 is a schematic cross-sectional view of a packaging film using eco-friendly ink for aqueous laminates according to an embodiment of the present invention.

Packaging films (100, DL) using eco-friendly ink for aqueous laminates according to an embodiment of the present invention include a first film 110 printed on at least one side of the eco-friendly ink composition for aqueous laminates; An adhesive layer 130 applied on the first film; And a second film 150 laminated on the adhesive layer; in the printing, the bow is 220 to 230 lines, and the engraving depth is 12 µm to 15 µm, specifically 13 µm to 15 µm, more specifically It may be printed using a copper plate of 13㎛ to 14㎛.

The first film 110 and the second film 150 are substantially the same as the description of a method for manufacturing a packaging film using eco-friendly ink for aqueous aqueous laminates, which is one aspect of the present invention.

The adhesive layer 130 may be formed by applying and drying an adhesive as described in the method for manufacturing a packaging film using eco-friendly ink for aqueous aqueous laminates, which is one aspect of the present invention.

The packaging film using the eco-friendly ink for water-based laminates may have excellent dispersing power of pigments and reduce the amount of ink used by applying the eco-friendly ink composition for water-based laminates of the present invention.

Specifically, printing on the first film 110 uses a copper plate with a bow of 220 to 230 lines, a depth of engraving of 12 μm to 15 μm, specifically 13 μm to 15 μm, and more specifically 13 μm to 14 μm Can be printed.

Packaging film manufacturing method using eco-friendly ink for water-based laminate (extrusion type)

A method of manufacturing a packaging film using eco-friendly ink for aqueous laminates according to another embodiment of the present invention will be described with reference to FIG. 3. 3 is a flowchart showing a simple method of manufacturing a packaging film using eco-friendly ink for aqueous laminates according to another embodiment of the present invention.

Referring to FIG. 3, a method for manufacturing a packaging film using eco-friendly ink for aqueous laminate according to another embodiment includes: a first step of performing a gravure printing process in a roll-to-roll manner with an eco-friendly ink composition for water-based laminate on one side of the first film; A second step of applying a coating agent to the printed first film; A third step of forming a second film by melt-extruding a resin through a T-die on the first film to which the coating agent is applied; And a fourth step of laminating a third film on the second film, wherein in the first step, the bow is 220 to 230 lines, and the engraving depth is 12 µm to 15 µm, specifically 13 µm to 15 µm. Μm, more specifically 13 µm to 14 µm, may be used to perform a gravure printing process.

The first step is substantially the same as the first step of the method for manufacturing a packaging film using the eco-friendly ink for aqueous laminate according to the embodiment.

In the second step, a coating agent may be applied to the printed first film. The coating agent may be an aqueous type anchor coating of imine heat. In this case, there is an advantage in that the adhesion between the film layers is improved.

In the third step, the second film is formed by melt-extruding a resin through a T-die on the first film coated with the coating agent.

In the melt extrusion of the third step, the air gap between the extrusion die and the cooling roll may be 185mm to 215mm, and the temperature of the extrusion die may be 315°C to 325°C, specifically 320°C. The cooling roll may be a mat type roll capable of forming an air channel. In this case, the cooling roll may have a grid-shaped protrusion formed regularly or irregularly by sand having a size of 80 mesh to 100 mesh. In addition, the average surface roughness may be 1.5 μm.

The second film may perform a laminating role, improve moisture permeability and transmittance, and may perform a blocking role to protect the first film.

The second film may be an aluminum foil (AL-Foil), an aluminum deposition film (VM-PET: Vacuumm Metalized PolyEthylene Terephthalate Film), a NY film, a vinylidene chloride film (PVDC: Polyvinyliolene chloride), an EVOC film, and the like. However, the present invention is not limited thereto, and any material that performs the role of laminating and has blocking properties may be applied.

In the fourth step, a third film is laminated on the second film. After the second film and the third film are laminated, the third film may be laminated on the second film by compression cooling.

In addition, in the fourth step, the diameter of the silicon pressure roll used for bonding the cooling roll and the film may be 215 mm to 225 mm, specifically 220 mm, and the contact distance between the cooling roll and the film may be 1450 mm to 1600 mm. In this case, the pressing effect can be increased, and the contact force can be improved.

The third film may be formed of a polypropylene non-stretched film (CPP), an aluminum evaporated non-stretched film (VM-CPP), a linear low density polyethylene (LLDPE), or the like.

The second film and/or the third film may be formed in plural, and in this case, each layer may be formed of a different material.

However, if the second film and the third film are formed in a plurality of layers, the third film is formed after the second film is formed, which serves as a lamination and blocking agent, and a water-based anchor coating agent is applied to the third film. After forming the coating layer, another material is melt-extruded to form a second film again, and a third film composed of another material may be laminated.

The packaging film manufacturing method using the eco-friendly ink composition for aqueous laminates of another embodiment using the extrusion process is to form a coating layer by applying a coating agent according to the thickness of the packaging film, and 　 the process of forming the second film and the third film multiple times. It can be carried out to manufacture a packaging film in multiple layers.

Packaging film using eco-friendly ink for water-based laminate (extrusion type)

Hereinafter, a packaging film using eco-friendly ink for aqueous laminates according to another embodiment of the present invention will be described with reference to FIG. 4. 4 is a simplified cross-sectional view of a packaging film using eco-friendly ink for aqueous laminates according to another embodiment of the present invention.

Packaging film 200 using eco-friendly ink for aqueous laminate according to another embodiment of the present invention includes a first film 210 printed on at least one side of the eco-friendly ink composition for aqueous laminate; A coating layer 230 applied on the first film; A second film 250 formed by melt-extruding a resin through a T-die on the first film coated with the coating agent; And a third film 270 laminated on the second film. In the printing, the bow is 220 to 230 lines, and the engraving depth is 12 µm to 15 µm, specifically 13 µm to 15 µm, further Specifically, it may be printed using a copper plate of 13㎛ to 14㎛.

The first film 210, the coating layer 230, the second film 250, and the third film 270 are as described in the packaging film manufacturing method using eco-friendly ink for aqueous laminate according to another embodiment of the present invention. Substantially the same.

Here, the eco-friendly ink composition for the aqueous laminate is based on 100 parts by weight, 8 to 14 parts by weight of a water-based acrylic resin; 10 to 16 parts by weight of pigment; 33 to 39 parts by weight of an aqueous urethane resin; 3 to 6 parts by weight of auxiliary resin; 6 to 12 parts by weight of ethanol; 20 to 25 parts by weight of water; And 1 to 5 parts by weight of additives; may include.

The packaging film 200 using the eco-friendly ink for water-based laminates is, by applying the eco-friendly ink composition for water-based laminates, by applying the water-based acrylic resin excellent dispersing power of the pigment and it is possible to reduce the amount of ink used.

Specifically, printing on the first film 110 uses a copper plate with a bow of 220 to 230 lines, a depth of engraving of 12 μm to 15 μm, specifically 13 μm to 15 μm, and more specifically 13 μm to 14 μm Can be printed.

Packaging film using eco-friendly ink for water-based laminate (composite type)

Hereinafter, a packaging film using eco-friendly ink for aqueous laminates according to another embodiment of the present invention will be described with reference to FIG. 5. 5 is a schematic cross-sectional view of a packaging film using eco-friendly ink for aqueous laminates according to another embodiment of the present invention.

The packaging film 300 using eco-friendly ink for aqueous laminate according to another embodiment includes a first film 310 on which an eco-friendly ink composition for aqueous laminate is printed on at least one side; A coating layer 330 applied on the first film; A second film 350 formed by melt-extruding a resin through a T-die on the first film coated with the coating agent; A third film 370 laminated on the second film; And a fourth film 390 laminated on the third film.

The fourth film may be laminated after forming a resin layer by melt-extruding a resin through the T-die.

Specifically, in order to further improve interlayer adhesion in the packaging film 200 using eco-friendly ink for aqueous laminates as shown in FIG. 4, and to minimize the occurrence of bubbles, melt-extrusion of the resin through the T-die to form a resin layer, 3 The fourth film 390 may be laminated on the film 370. Of course, a solvent-free adhesive may be applied to one surface of the third film 370 to form an adhesive layer, followed by drying and bonding the fourth film 390 by pressure bonding.

Hereinafter, the configuration and operation of the present invention will be described in more detail through preferred embodiments of the present invention. However, this is presented as a preferred example of the present invention and cannot be construed as limiting the present invention in any sense.

Contents not described herein can be sufficiently technically inferred by those skilled in the art, and thus description thereof will be omitted.

Example

Example 1

11.2 parts by weight of an aqueous acrylic resin, 13.5 parts by weight of a pigment, 9 parts by weight of ethanol, and 22.5 parts by weight of water were mixed and premixed for 1 hour, followed by a dynomill operation for 4 to 5 hours. To the mixture, 36 parts by weight of an aqueous polyurethane resin was added to dynomill for 2 to 3 hours, and 4.5 parts by weight of an auxiliary resin (CL-PP) and 3.3 parts by weight of additives (dispersant, wax, silica) were mixed thereto. Thus, an eco-friendly ink composition for aqueous laminates was prepared.

Comparative Example 1

8.5 parts by weight of an aqueous acrylic resin, 13.5 parts by weight of a pigment, 9 parts by weight of ethanol, and 21 parts by weight of water were mixed and premixed for 1 hour, followed by a dynomill operation for 4 to 5 hours. 41 parts by weight of an aqueous polyurethane resin was added to the mixture, followed by dinomil work for 2 to 3 hours, and 4 parts by weight of auxiliary resin (CL-PP) and 3 parts by weight of additives (dispersant, wax, silica) were mixed thereto. Thus, an eco-friendly ink composition for aqueous laminates was prepared.

Comparative Example 2

11.2 parts by weight of an aqueous acrylic resin, 13.5 parts by weight of a pigment, 17 parts by weight of ethanol, and 14.5 parts by weight of water were mixed and premixed for 1 hour, followed by a dynomill operation for 4 to 5 hours. To the mixture, 36 parts by weight of an aqueous polyurethane resin was added to dynomill for 2 to 3 hours, and 4.5 parts by weight of an auxiliary resin (CL-PP) and 3.3 parts by weight of additives (dispersant, wax, silica) were mixed thereto. Thus, an eco-friendly ink composition for aqueous laminates was prepared.

Comparative Example 3

4 parts by weight of an aqueous acrylic resin, 7.2 parts by weight of a vinyl chloride vinyl acetate copolymer, 13.5 parts by weight of a pigment, 9 parts by weight of ethanol, and 22.5 parts by weight of water were mixed and premixed for 1 hour, followed by a dinomill operation for 4 to 5 hours. . To the mixture, 36 parts by weight of an aqueous polyurethane resin was added to dynomill for 2 to 3 hours, and 4.5 parts by weight of an auxiliary resin (CL-PP) and 3.3 parts by weight of additives (dispersant, wax, silica) were mixed thereto. Thus, an eco-friendly ink composition for aqueous laminates was prepared.

Assessment Methods

Using the ink compositions of Example 1 and Comparative Examples 1 to 3, a gravure printing process (throw 225, depth of 13 μm) was performed on the OPP film. At this time, in the gravure printing, the drying chamber temperature is 85°C or higher, the cooling roller is an anodized spiral groove type cooling roller, the cooling water temperature is 18.5°C to 22°C, and the printing copper plate and doctor blade blade) angle was 60° to 65°, the cell wall height of the printed copper plate for each color was 9 μm to 14 μm, and the air volume provided to the drying box was 55 CMM to 75 CMM, and was performed in the environment.

A solvent-free type of urethane-based polyester adhesive was applied on the printed OPP film, dried and cured at 45° C. or higher, and a CPP film was laminated thereto to prepare a packaging film.

The eco-friendly ink for water-based laminate of Example 1 can work with a printing line speed of 150m/M or more, has good adhesion and dry conditions, does not cause blocking, does not cause contamination on the printing roll, and uses ink. Despite this small amount, the printing condition was very good.

As in Comparative Example 1, when the polyurethane resin was out of the scope of the present invention, the adhesive strength was excellent, but drying was delayed, a blocking phenomenon occurred, and contamination occurred on the printing roll.

As in Comparative Example 2, when the content of ethanol and water were out of the scope of the present invention, the viscosity increased and the color of the ink became darker, but the ink solid content increased, contamination occurred in the printing roll, and the ink raw material cost was increased.

When a part of the aqueous acrylic resin was replaced with another resin as in Comparative Example 3, the compatibility with water was lowered and the dispersion of the pigment was poor, resulting in low print quality.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, but may be manufactured in various different forms, and those of ordinary skill in the technical field to which the present invention pertains to the technical idea of the present invention. It will be appreciated that it can be implemented in other specific forms without changing any or essential features. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting.

100: packaging film (DL) 110: first film
130: adhesive layer 150: second film
200: packaging film (extrusion type) 210: first film
230: coating layer 250: second film
270: third film 300: packaging film (composite type)
310: first film 330: coating layer
350: second film 370: third film
390: fourth film

Claims (18)

A first step of performing a gravure printing process with an eco-friendly ink composition for water-based laminate on one side of the first film in a roll-to-roll method;
A second step of applying and drying an adhesive on the printed first film;
Including; a third step of laminating a second film on the first film,
In the first step, a gravure printing process is performed with a copper plate having a bow of 220 to 230 and a depth of engraving of 12 μm to 15 μm,
The eco-friendly ink composition for aqueous laminate is based on 100 parts by weight,
8 to 14 parts by weight of an aqueous acrylic resin; 10 to 16 parts by weight of pigment; 33 to 39 parts by weight of an aqueous urethane resin; 3 to 6 parts by weight of chlorinated polypropylene (Cl-PP); 6 to 12 parts by weight of ethanol; 20 to 25 parts by weight of water; And 1 to 5 parts by weight of additives; including no VOC regulated substances,
The ethanol and water a weight ratio of 1: 2 to 1: 3, a packaging film manufacturing method using an eco-friendly ink for aqueous laminates.
The method of claim 1,
The first step,
The drying chamber temperature is 85℃ or higher, and the cooling roller is an anodized spiral groove type cooling roller, and the cooling water temperature is 18.5℃ to 22℃. Way.
The method of claim 1,
The first step,
The angle between the printed copper plate and the doctor blade is 60° to 65°, and the cell wall height of the printed copper plate for each color is 9 μm to 14 μm,
The air volume provided in the drying box is 55CMM to 75CMM, and a packaging film manufacturing method using eco-friendly ink for aqueous laminates in which a gravure printing process is performed.
delete delete delete The method of claim 1,
The adhesive contains a solvent-free type of urethane-based polyester,
A packaging film manufacturing method using an eco-friendly ink for aqueous laminates containing 60 to 65 parts by weight of a curing agent based on 100 parts by weight of the adhesive.
The method of claim 1,
Drying in the second step is a method for manufacturing a packaging film using eco-friendly ink for aqueous laminates cured at 45°C or higher.
A first film having an eco-friendly ink composition for water-based laminate printed on at least one surface;
An adhesive layer applied on the first film; And
Including; a second film laminated on the adhesive layer,
The eco-friendly ink composition for aqueous laminate is based on 100 parts by weight,
8 to 14 parts by weight of an aqueous acrylic resin; 10 to 16 parts by weight of pigment; 33 to 39 parts by weight of an aqueous urethane resin; 3 to 6 parts by weight of chlorinated polypropylene (Cl-PP); 6 to 12 parts by weight of ethanol; 20 to 25 parts by weight of water; And 1 to 5 parts by weight of additives; including no VOC regulated substances,
The ethanol and water have a weight ratio of 1:2 to 1:3,
The printing is a packaging film using eco-friendly ink for water-based laminates that are printed using a copper plate having 220 to 230 lines and a depth of 12 μm to 15 μm.
delete A first step of performing a gravure printing process with an eco-friendly ink composition for water-based laminate on one side of the first film in a roll-to-roll method;
A second step of applying a coating agent to the printed first film;
A third step of forming a second film by melt-extruding a resin through a T-die on the first film to which the coating agent is applied; And
A fourth step of laminating a third film on the second film;
Including,
In the first step, a gravure printing process is performed with a copper plate having a bow of 220 to 230 and a depth of engraving of 12 μm to 15 μm,
The eco-friendly ink composition for aqueous laminate is based on 100 parts by weight,
8 to 14 parts by weight of an aqueous acrylic resin; 10 to 16 parts by weight of pigment; 33 to 39 parts by weight of an aqueous urethane resin; 3 to 6 parts by weight of chlorinated polypropylene (Cl-PP); 6 to 12 parts by weight of ethanol; 20 to 25 parts by weight of water; And 1 to 5 parts by weight of additives; including no VOC regulated substances,
The ethanol and water a weight ratio of 1: 2 to 1: 3, a packaging film manufacturing method using an eco-friendly ink for aqueous laminates.
delete The method of claim 11,
The coating agent is a method of manufacturing a packaging film using eco-friendly ink for aqueous laminates, which is an aqueous type anchor coating of imine heat.
The method of claim 11,
In the melt extrusion of the third step, the distance between the extrusion die and the cooling roll is 185mm to 215mm, the temperature of the extrusion die is 315°C to 325°C, and the mat having a sand size of 80 to 100 meshes Packaging film manufacturing method using eco-friendly ink for aqueous laminates performed by a cooling roll including a type roll.
The method of claim 14,
The fourth step is a method of manufacturing a packaging film using eco-friendly ink for aqueous laminates having a diameter of 215mm to 225mm, and a contact distance between the cooling roll and the film when bonding the cooling roll and the film is 1450mm to 1600mm.
A first film having an eco-friendly ink composition for water-based laminate printed on at least one surface;
A coating layer applied on the first film;
A second film formed by melt-extruding a resin through a T-die on the first film to which the coating layer is applied; And
Including; a third film laminated on the second film,
The eco-friendly ink composition for aqueous laminate is based on 100 parts by weight,
8 to 14 parts by weight of an aqueous acrylic resin; 10 to 16 parts by weight of pigment; 33 to 39 parts by weight of an aqueous urethane resin; 3 to 6 parts by weight of chlorinated polypropylene (Cl-PP); 6 to 12 parts by weight of ethanol; 20 to 25 parts by weight of water; And 1 to 5 parts by weight of additives; including no VOC regulated substances,
The ethanol and water have a weight ratio of 1:2 to 1:3,
The printing is a packaging film using eco-friendly ink for water-based laminates that are printed using a copper plate having a player of 220 to 230 lines, and a engraving depth of 12 μm to 15 μm.
delete The method of claim 16,
The packaging film further comprises a fourth film laminated on the third film,
The fourth film is a packaging film using eco-friendly ink for aqueous laminates that is laminated after forming a resin layer by melt-extruding a resin through the T-die.

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