KR102179771B1 - Manufacturing method for environment-friendly functional plastic products - Google Patents

Abstract

The present invention relates to a method of manufacturing an eco-friendly functional plastic product.
In the method of manufacturing an eco-friendly functional plastic product according to the present invention, a plastic substrate is prepared, a primer layer is formed on the plastic substrate, an epoxy layer is formed on the primer layer, and a coating layer is formed on the epoxy layer, The primer layer is formed by mixing and mixing a primer composition at a certain weight ratio and then applying it on the plastic substrate, the primer composition is 50 to 100 parts by weight of acrylic emulsion resin, 10 to 20 parts by weight of ethylene glycol, and isocyanate ) 5 to 15 parts by weight and 10 to 20 parts by weight of a phosphorus monomer are mixed in a weight ratio, added to a mixing tank, and uniformly mixed, and the epoxy layer is prepared by mixing and mixing the epoxy composition at a certain weight ratio, and the primer Formed by applying the epoxy composition on the top of the layer, the epoxy composition is a self-emulsifying epoxy resin 50 to 100 parts by weight, acrylic modified polyester resin 10 to 30 parts by weight, pigment 1 to 10 parts by weight and 5 to 10 parts by weight of a curing agent It is prepared by blending and mixing at a weight ratio of parts, and the coating layer is formed by blending and mixing a coating composition at a constant weight ratio and then applying it on the epoxy layer, the coating composition is a UV curable coating composition, and the UV It is prepared by applying a curable coating composition on the top of the epoxy layer and then curing it with a UV lamp of 250 to 350 mJ/cm ² irradiation in a UV coating device, and the UV curable coating composition includes 20 to 40 parts by weight of urethane acrylate oligomer, It is included in a weight ratio of 1 to 5 parts by weight of a filler and 1 to 3 parts by weight of a photoinitiator.
According to the above configuration, the present invention can manufacture a plastic product by adding a functional material and coating the surface, thereby improving durability, maintaining cleanliness, and making it easy to clean and maintain an eco-friendly functional plastic product because there is no stain. .

Description

Manufacturing method of eco-friendly functional plastic products{MANUFACTURING METHOD FOR ENVIRONMENT-FRIENDLY FUNCTIONAL PLASTIC PRODUCTS}

The present invention relates to a method of manufacturing an eco-friendly functional plastic product, and more particularly, by adding a functional material and coating the surface to manufacture a plastic product, thereby improving durability, maintaining cleanliness, and making it easy to clean and maintain because there is no stain. It relates to a method of manufacturing an eco-friendly functional plastic product.

Plastic materials invented with the development of modern civilization in the 20th century revolutionized the civilization of modern people. Plastic materials are used in various ways, from construction materials to dining tables, clothing, office supplies, and food packaging.

In addition to this abundant and convenient daily life, it has made a great contribution to industrial development, and plastic materials will continue to be used in the future and will continue to develop in terms of functions.

However, since plastics that have brought the benefits of civilization in this way have become a target material that causes environmental pollution in the 21st century, it can be said that it is a responsibility given to all humanity in front of the proposition of sustainable development and environmental preservation.

Plastic materials are used conveniently and are discarded in large quantities, such as environmental hormone leakage due to incineration or landfilling of various waste vinyls, styrofoam, plastic containers, and food packaging materials, severe toxic dioxin detection, and serious air pollution due to incomplete combustion of waste. It leads to environmental pollution.

In order to solve such a serious environmental pollution problem, it is important to improve environmental awareness, develop materials that are fused with nature in the industry, and, in particular, to preserve the environment leading to national promotion measures.

Meanwhile, various attempts have been made to impart antibacterial and anti-fungal properties to plastic products such as plastic bottles and plastic containers. For example, Korean Patent No. 359289 describes bacteriocin, which is an antibiotic substance such as nisin and lactisin, mixed with a polyamide binder and coated on a plastic film packaging material to be used for food packaging, thereby inhibiting the growth of microorganisms on the food surface. bacteriocin) coated antibacterial plastic film and its manufacturing method are disclosed, and in Korean Patent No. 501242, nanosilver particles and pigments are coated on the surface of transparent plastic raw materials, and nanosilver particles and pigments are coated on the surface of plastic raw materials. Disclosed is an injection molding method having an antibacterial function in which the resulting mixture is injected into an injection molding machine and melted.

However, these are used by coating materials having antimicrobial properties, and not only do not meet expectations in terms of effectiveness, but also have disadvantages that are not economical.

Domestic registered patent No. 10-1004710 (registered on December 22, 2010) Domestic registered patent No. 10-0865117 (registered on October 17, 2008) Korean Patent Publication No. 10-2011-0014001 (published on February 10, 2011)

The present invention is to provide a manufacturing method of an eco-friendly functional plastic product that is easy to clean and maintain because a functional material is added and a surface is coated to manufacture a plastic product, thereby improving durability, maintaining cleanliness, and having no stains.

Various problems to be solved by the present invention are not limited to the problems mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

In the method of manufacturing an eco-friendly functional plastic product according to the present invention, a plastic substrate is prepared, a primer layer is formed on the plastic substrate, an epoxy layer is formed on the primer layer, and a coating layer is formed on the epoxy layer, The primer layer is formed by mixing and mixing a primer composition at a certain weight ratio and then applying it on the plastic substrate, the primer composition is 50 to 100 parts by weight of acrylic emulsion resin, 10 to 20 parts by weight of ethylene glycol, and isocyanate ) 5 to 15 parts by weight and 10 to 20 parts by weight of a phosphorus monomer are mixed in a weight ratio, added to a mixing tank, and uniformly mixed, and the epoxy layer is prepared by mixing and mixing the epoxy composition at a certain weight ratio, and the primer Formed by applying the epoxy composition on the top of the layer, the epoxy composition is a self-emulsifying epoxy resin 50 to 100 parts by weight, acrylic modified polyester resin 10 to 30 parts by weight, pigment 1 to 10 parts by weight and 5 to 10 parts by weight of a curing agent It is prepared by blending and mixing at a weight ratio of parts, and the coating layer is formed by blending and mixing a coating composition at a constant weight ratio and then applying it on the epoxy layer, the coating composition is a UV curable coating composition, and the UV It is prepared by applying a curable coating composition on the top of the epoxy layer and then curing it with a UV lamp of 250 to 350 mJ/cm ² irradiation in a UV coating device, and the UV curable coating composition includes 20 to 40 parts by weight of urethane acrylate oligomer, It is included in a weight ratio of 1 to 5 parts by weight of a filler and 1 to 3 parts by weight of a photoinitiator.

Details of other embodiments are included in the detailed description.

The manufacturing method of an eco-friendly functional plastic product according to the present invention is an eco-friendly functional plastic product that is easy to clean and maintain because it improves durability, maintains cleanliness, and does not cause stains by manufacturing a plastic product by adding a functional material and coating the surface. Can be manufactured.

It will be fully understood that the embodiments of the technical idea of the present invention can provide various effects not specifically mentioned.

1 is a photograph showing an example of a plastic product manufactured according to the present invention.
2 is a schematic view showing a cross section of a plastic product manufactured according to the present invention.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed content may be thorough and complete, and the spirit of the present invention may be sufficiently conveyed to those skilled in the art.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

Unless otherwise defined, all terms including technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

Hereinafter, a preferred embodiment will be described in detail with respect to a method for manufacturing an eco-friendly functional plastic product according to the present invention with reference to the accompanying drawings.

1 is a photograph showing an example of a plastic product manufactured according to the present invention, and FIG. 2 is a view schematically showing a cross section of a plastic product manufactured according to the present invention.

1 and 2, in order to manufacture an eco-friendly functional plastic product according to the present invention, first, a plastic substrate 100 may be manufactured.

The plastic substrate 100 may be a plastic substrate 100 manufactured by the following manufacturing method.

First, it is possible to prepare anti-insect substances and additives that can exert a pest repelling effect or an antibacterial effect.

The anti-insect substances are repellent substances such as insects or pests, and the anti-insect substances include Allethrin, Bifenthrin, Cyhalothrin, Cypermethrin, and Cypermethrin. Any one or more selected from the group consisting of (Cyfluthrin) may be used.

The additive is a material that radiates a large amount of far-infrared rays and anions and has antibacterial and deodorizing effects against pollutants or mites, and the additives include silicon dioxide nanoparticles, calcined calcium, loess, vermiculite, and activated carbon, The additive may be included in a weight ratio of 1 to 3 parts by weight of silicon dioxide nanoparticles, 0.5 to 2 parts by weight of calcined calcium, 2 to 4 parts by weight of loess, 0.5 to 1.5 parts by weight of vermiculite, and 0.1 to 1 parts by weight of activated carbon.

The silicon dioxide (SiO ₂ ) is an oxide of silicon, which is also called silica and is used as a major component such as mullite, cordierite, and loess, which are well known to emit far-infrared rays. The silicon dioxide has the effect of emitting a large amount of far-infrared rays even in a small amount and is inexpensive, but amorphous silica is evaluated as not carcinogenic to the human body and is used as a main raw material for cosmetics, and no harm to the human body is known. .

The calcined calcium may be prepared by calcining and drying calcium carbonate (CaCO ₃ ) at a temperature of 1250 to 1350° C. for 3 to 7 hours, and the calcined calcium penetrates the cell membrane of bacteria and hydrolyzes the cytoplasm, thereby antibacterial and antifungal Can exert action.

The loess adsorbs and decomposes impurities and contaminants into the space between particles, is rich in oxygen, and emits far infrared rays. The far-infrared rays emitted from the loess have a wavelength of 8 to 14 μm, and the far-infrared rays of the loess activate the cells of the cells to promote metabolism. From loess, far-infrared rays are radiated and absorbed by the human body, metabolism and blood circulation are activated to prevent aging of the human body, and various adult diseases such as chronic fatigue can be prevented. When far-infrared rays are radiated from the loess, bacteria are weakened due to the thermal action, and it may help promote the production of cell tissues.

As the vermiculite, foamed vermiculite may be used, and the foamed vermiculite may radiate far-infrared rays and exhibit antibacterial and deodorizing effects. In the present invention, the vermiculite has a foam density of 400 to 600 kg/m ³ and a particle diameter of 10 to 100 μm may be powdered and used.

The activated carbon is a carbon aggregate with developed micropores, and can change its internal surface area by an activation process, and has excellent absorbency and adsorption properties in which it is adsorbed with surrounding liquids or gases by a functional group of carbon atoms inside.

In the present invention, the activated carbon may be powdered and used in the range of 10 to 100 μm in particle diameter, and such powdered activated carbon not only enhances the adsorption power of the porous activated carbon itself, but also increases the adsorption power of the porous activated carbon itself. Due to its compactness, adhesion is increased, and antioxidant and hydrophobic functions can be provided.

In the present invention, the activated carbon has a hardness of 92 or more, a packing density of 0.47 to 0.53 g/ml, a specific surface area of 1,150 to 1,250 m ² /g, a pore distribution of 4 to 10, an iodine adsorption capacity of 1,000 mg/g or more, a pore volume of 0.502 ml/g, Those having a pH of 10 to 11, a phenol adsorption power of 17 ml/g, and an M·B decolorization power of 160 ml/g or more may be used.

Next, polypropylene (PP: PolyProphlene), polyethylene (PE: PolyEthylene) and EVA (Ethylene Vinyl Acetate Copolymer) resins prepared in a chip state were all added to the extruder, and the polypropylene, polyethylene, and EVA resin were added to the extruder. After preparing a mixed resin by adding polyvinylidene fluoride resin and a good-solvent and dissolving it by applying heat, the mixed resin was stirred to prepare a chip, and the chip was cooled to cut the batch chip. Can be manufactured.

The polypropylene, polyethylene, and EVA resin may be mixed in a weight ratio of 25 to 35 parts by weight of polypropylene, 35 to 55 parts by weight of polyethylene, and 15 to 25 parts by weight of EVA resin, respectively, and the polypropylene, polyethylene, and EVA resin total 100 A mixed resin may be prepared by mixing in a weight ratio of 10 to 20 parts by weight of a polyvinylidene fluoride-based resin and 15 to 25 parts by weight of a good solvent based on parts by weight, and the extruder into which the mixed resin is added 230 so that the resin can be melted. Heat may be applied at a temperature of to 240°C.

In the present invention, the polyethylene (PE) belongs to the ultra-lightweight plastic products and has excellent cushioning power, water resistance, and low temperature impact resistance, and the polypropylene (PP) has very similar properties to the polyethylene (PE), but has transparency and tensile strength, etc. Having this excellent property, the EVA resin is a copolymer resin of ethylene and vinyl acetate, and has very excellent properties such as transparency, flexibility, and low temperature brittleness, and is a very eco-friendly resin.

As the polyvinylidene fluoride resin, a known polyvinylidene fluoride resin having a molecular weight of 500,000 to 550,000 g/mol may be used. If the polyvinylidene fluoride-based resin is included in less than 10 parts by weight, the strength of the manufactured plastic product may be weakened, and if it is included in more than 20 parts by weight, it is difficult to mold the plastic product. Can occur.

The good solvent is used to dissolve the polyvinylidene fluoride resin, and in the present invention, dimethyl acetamide may be used as the good solvent. In the present invention, if the good solvent is contained in an amount of less than 15 parts by weight, it may be difficult to form a plastic product, and if it is contained in an amount exceeding 25 parts by weight, a problem of weakening the strength of the manufactured plastic product may occur. have.

In addition, in the present invention, batch chips are manufactured by cooling and cutting the chips, and the cooling is performed in a cooler and may be performed at a temperature of 55 to 65°C.

Next, a master batch chip may be manufactured by mixing the batch chip with an anti-repellent substance and an additive.

In the above step, the batch chips, anti-repellent substances and additives are put into an extruder, heat is applied to the extruder into which the batch chips, anti-repellent substances and additives are added, and melted, and then the melted batch chips, anti-repellent substances and additives are mixed. Master batch chips can be prepared by stirring, cooling and cutting.

In the above step, the batch chip, the anti-repellent substance and the additive are mixed in a weight ratio of 250 to 350 parts by weight of the batch chip, 5 to 10 parts by weight of the anti-repellent substance, and 10 to 20 parts by weight of the additive, respectively, and heated to a temperature of 230 to 250°C. It may be melted, and the master batch chip may be prepared by mixing and stirring the molten batch chip, the anti-repellent substance, and the additive, followed by cooling and cutting, wherein the cooling is performed in a cooler maintaining a temperature of 40 to 50°C. I can.

Subsequently, the master batch chip is put into a mold and then molded and pressed to produce a plastic substrate 100 representing the shape of a product.

In the above step, after the master batch chip is put into a mold, the plastic substrate 100 may be manufactured by pressing at a temperature of 220 to 240°C and a pressure of 25 to 35 kgf/cm ² .

Next, a primer layer 200 may be formed on the plastic substrate 100.

The primer layer 200 may be formed on the plastic substrate 100 and formed so that the epoxy layer 300 is firmly attached to the surface of the plastic substrate 100.

The primer layer 200 may be formed by mixing and mixing a primer composition in a certain weight ratio and then applying it on the plastic substrate 100. The primer composition includes 50 to 100 parts by weight of an acrylic emulsion resin and 10 ethylene glycol. To 20 parts by weight, 5 to 15 parts by weight of isocyanate, and 10 to 20 parts by weight of a phosphorus-based monomer are mixed in a weight ratio, added to a mixing tank, and then uniformly mixed.

The acrylic emulsion resin has a low film formation temperature and excellent flexibility even without the use of a plasticizer, and has excellent weather resistance and abrasion resistance.The acrylic emulsion resin is prepared including a monomer composition, a crosslinkable monomer and a stabilizer, The acrylic emulsion resin may be prepared including 1.0 to 3.0 parts by weight of the crosslinkable monomer and 0.1 to 0.5 parts by weight of a stabilizer based on 100 parts by weight of the monomer composition.

The monomer composition may be any one or more monomers selected from the group consisting of alkenyl aromatic monomer, acrylonitrile, vinyl acetate, and vinyl versatate, and the The crosslinkable monomer plays a role of imparting a crosslinking function to the acrylic emulsion resin, and can improve the adhesion of the acrylic emulsion resin. The crosslinkable monomer is a hydroxy functional monomer, an amino functional monomer. Any one or more selected from the group consisting of a monomer, an epoxy functional monomer, a carbonyl functional monomer, and a methylol functional monomer may be used.

The hydroxy functional monomer may be any one or more monomers selected from the group consisting of 2-hydroxyethyl methacrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl methacrylate, 2-hydroxypropyl acrylate, and 2-hydroxybutyl acrylate, and the amino functional monomer is N ,N-dimethyl aminoethyl methacrylate, N,N-dimethyl aminoethyl acrylate, and N,tert-butyl aminoethyl methacrylate may be used any one or more monomers selected from the group consisting of, the epoxy functional monomer may be used glycidyl methacrylate, the car The bonyl functional monomer may be any one or more monomers selected from diacetone acrylamide or acetoacetoxyrthyl metacrylate, and the methylol functional monomer is any one or more monomers selected from the group consisting of N-methylol acrylamide, N-methylol methacrylamide and Nn-isobutoxymethyl acrylamide. Can be used.

The stabilizer is added to improve the physical and chemical stability of the acrylic emulsion resin, and the stabilizer may be any one selected from allyl alkyl sulfonate or copolymerizable sulfonate manomer.

The ethylene glycol may be added to improve fluidity and workability before curing, and to improve physical and chemical performance after curing.

The isocyanate acts as a curing agent, for example, the isocyanate is hexamethylene diisocyanate (HDI), hexamethylene diisocyanate trimer (HDT), isophorone diisocyanate (Isophorone Diisocyanate, IPDI), and cyclohexylmethane. Any one or more selected from the group consisting of diisocyanate (Cyclohexylmethanediisocyanate, H12MDI) may be used.

The phosphorus monomer may be used to improve adhesion to the plastic substrate 100 and to improve rust prevention. For example, the phosphorus monomer is bis[2-(methacryloxy)ethyl] phosphate (Bis[2 -(methacyloyloxy)ethyl] phosphate, DMEP), 2-(methacryloyloxy) ethyl phosphate (2-(methacryloyloxy) ethyl phosphate, MMEP) and Tris(2-methacryloyloxy) ethyl phosphate, TMEP) may be used.

Next, an epoxy layer 300 may be formed on the primer layer 200.

The epoxy layer 300 may be positioned on the primer layer 200 and formed to exhibit a high gloss effect.

The epoxy layer 300 is formed by mixing and mixing an epoxy composition at a certain weight ratio and then applying the epoxy composition on the primer layer 200, and the epoxy composition is a self-emulsifying epoxy resin, an acrylic modified polyester Resin, pigment, silica, and a curing agent may be included, and the epoxy composition includes 50 to 100 parts by weight of a self-emulsifying epoxy resin, 10 to 30 parts by weight of an acrylic-modified polyester resin, 1 to 10 parts by weight of a pigment, and 5 It may be blended in a weight ratio of to 10 parts by weight.

The self-emulsifying epoxy resin is an epoxy resin having an active group that can be emulsified in itself, and the self-emulsifying epoxy resin is a self-emulsifying modified epoxy resin having an epoxy equivalent of 200 to 230 g/eq. , Weather resistance, water resistance, and other physical properties can be remarkably improved.

The self-emulsifying epoxy resin is used in 50 to 100 parts by weight, and when the self-emulsifying epoxy resin is included in less than 50 parts by weight, adhesion and sealing properties with the primer layer 200 may be deteriorated, and exceed 100 parts by weight. If included, the drying property may be delayed.

The acrylic-modified polyester resin is condensed and polymerized with a polybasic acid containing 40 to 50% by weight of anhydrous acid and 50 to 60% by weight of an aliphatic acid by condensation polymerization of a polyhydric alcohol containing 80 to 90% by weight of a diol and 10 to 20% by weight of a triol. To prepare a polyester resin having a value of 45 to 65 mgKOH/g, an acid value of 3 mgKOH/g or less, a glass transition temperature of 5 to 20°C, and a weight average molecular weight (Mw) of 2,500 to 3,500, and the polyester resin 50 to 60 weight % And 40-50% by weight of acrylic monomer are grafted to have a weight average molecular weight (Mw) of 5,000 to 7,000, a hydroxyl value of 50 to 60 mgKOH/g, an acid value of 3 mgKOH/g or less, and a glass transition temperature of 10 to 20°C An acrylic modified polyester resin in the range can be prepared.

The pigment sufficiently exhibits the required color and can play a role of controlling hardness, film formation and gloss.For example, the pigment includes calcium carbonate, clay, talc, magnesium silicate, kaolin, mica, silica, By using at least one selected from the group consisting of aluminum silicate, aluminum hydroxide, barium sulfate, and barium sulfate, hardness, impact resistance, rust resistance, and the like can be improved.

The curing agent is included in the epoxy composition and performs a function of reacting and curing on the primer layer 200, and as the curing agent, a curing agent resin and a curing accelerator may be mixed and used.

Modified aliphatic polyamine may be used as the curing agent resin, and 2,4,6-tridimethylaminomethyl phenol may be used as the curing accelerator, and the curing agent resin and the curing accelerator are 10 to 20 parts by weight of the curing agent resin, respectively And 3 to 8 parts by weight of the curing accelerator may be mixed and used.

Subsequently, a coating layer 400 may be formed on the epoxy layer 300.

The coating layer 400 may be formed by mixing and mixing a coating composition at a certain weight ratio and then applying it on the epoxy layer 300, the coating composition may be a UV curable coating composition, the UV curable After coating the coating composition on the top of the epoxy layer 300, it may be prepared by curing with a UV lamp of 250 to 350 mJ/cm ² irradiation amount in a UV coating device.

The UV curable coating composition may be prepared by mixing a urethane acrylate oligomer, a filler, and a photoinitiator at a certain weight ratio, and the UV curable coating composition is 20 to 40 parts by weight of a urethane acrylate oligomer, 1 to 5 parts by weight of a filler, and a photoinitiator It may be blended and included in a weight ratio of 1 to 3 parts by weight.

The urethane acrylate oligomer is a UV curable type, and may contain 20 to 40 parts by weight of the total content of the UV curable coating composition, and when the urethane acrylate oligomer is included in less than 20 parts by weight, a problem may occur in curability, and 40 If it is included in excess of parts by weight, it may be difficult to control the viscosity of the composition.

The filler is added to improve the thermal and physical strength, wear prevention and tear of the coating layer 400 and to improve corrosion resistance, weather resistance, and gloss.For example, the filler is perlite, At least one selected from the group consisting of vermiculite, barite, talc, diatomaceous earth, graphite, silica, calcium carbonate, magnesium silicate, calcium silicate, zinc phosphate, and barium sulfate Is used, and the average particle diameter is preferably 1 to 30 µm.

The photoinitiator may be used to activate a radical generated by UV to cause a polymerization reaction, and a known UV photoinitiator may be used as the photoinitiator. For example, as the photoinitiator, a benzophenone-based (BP), benzylke Any one or more selected from the group consisting of degassing (IC-651, BDK) and acetophenone (IC-184, HP-8) may be used.

Hereinafter, preferred embodiments of an eco-friendly functional plastic product according to the technical idea of the present invention will be described in more detail with reference to the accompanying drawings.

<Example>

A plastic product (garbage bin) was prepared to include a plastic substrate, a primer layer positioned on the plastic substrate, an epoxy layer positioned above the primer layer, and a coating layer positioned above the epoxy layer.

Here, the primer layer was formed by mixing and mixing a primer composition at a certain weight ratio and then applying it on the plastic substrate. The primer composition is 75 parts by weight of an acrylic emulsion resin, 15 parts by weight of ethylene glycol, and 10 parts by weight of isocyanate. It was prepared by mixing in a weight ratio of 15 parts by weight and 15 parts by weight of a phosphorus monomer, putting it in a mixing tank, and then uniformly mixing.

In addition, the epoxy layer was formed by mixing and mixing an epoxy composition in a certain weight ratio and then applying the epoxy composition on the primer layer, the epoxy composition is 80 parts by weight of self-emulsifying epoxy resin, acrylic modified polyester resin It was prepared by mixing in a weight ratio of 20 parts by weight, 5 parts by weight of a pigment, and 7 parts by weight of a curing agent, added to a mixing tank, and then uniformly mixed.

In addition, the coating layer was prepared by applying a UV curable coating composition on the top of the epoxy layer and then curing it with a UV lamp of 300 mJ/cm ² irradiation amount in a UV coating device.The UV curable coating composition includes 30 weight of urethane acrylate oligomer. It was prepared by mixing in a weight ratio of 3 parts by weight of a filler, 3 parts by weight of a filler, and 2 parts by weight of a photoinitiator, added to a mixing tank, and then uniformly mixed.

<Comparative Example>

After preparing a commercially available plastic product (garbage bin), it was used as a plastic product according to a comparative example.

The plastic product according to the comparative example was manufactured without containing functional substances such as anti-insect.

The wear resistance of the plastic product (garbage bin) manufactured as in the above example was measured, and the results are shown in Table 1 below.

1. Wear resistance test

Test method: KS F 3126 standard, (initial wear degree + final wear degree)/2 = pass if more than 350 times

Sample size: Test by making a 100mm diameter test disk

Quality standard: Test by replacing the wear wheel with a new wear wheel every 200 revolutions with S-42

Test Items Wear wheel Test result result Remark Initial wear point Final wear point Wear resistance S-42 Episode 490 Episode 610 550 times pass

Referring to [Table 1], in the abrasion resistance test of the plastic product manufactured according to the Example, the initial wear point was 490 times and the final wear point was 610 times, and it was confirmed that excellent wear resistance characteristics were shown.

2. Antibacterial test

Using the plastic product manufactured according to the above example, an antibacterial test was performed using the strains Escherichia coil ATCC 25922 and Pseudomonas aeruginosa ATCC 15442, and the results are shown in Table 2 below.

Test Items Sample classification Initial concentration Concentration after 48 hours (CFU/40p) Test by E. coli Comparative example 535 810 Example 535 270 Test by Nokdonggyun Comparative example 440 720 Example 440 315

Referring to [Table 2], it was confirmed that the plastic product according to the comparative example has increased bacteria over time, but the plastic product according to the example has reduced bacteria.

Here, CFU of the unit of concentration means Colony Forming Unit and 40p means 0.04mL.

3. Tick repellency test (anti-worm effect)

The plastic product manufactured according to the Example and the plastic product manufactured according to the comparative example were subjected to a tick repellency test. It is shown in [Table 3] of.

division Initial tick count Tick survivor Avoidance rate (%) D.farinae D.pteronyssinus D.farinae D.pteronyssinus D.farinae D.pteronyssinus Comparative example 4.5 ×10 ⁴ 4.6 ×10 ⁴ 5.9 ×10 ⁵ 5.5 ×10 ⁵ - - Example One 4.4 ×10 ⁴ 4.5 ×10 ⁴ 0 0 99.9 99.9 2 4.6 ×10 ⁴ 3.7 ×10 ⁴ 0 0 99.9 99.9 3 4.3 ×10 ⁴ 3.8 ×10 ⁴ 0 0 99.9 99.9

[Table 3] is the result of the mite repellency test conducted by the Korea Consumer Science Research Center, and 99.9 in the test tube method for both the large leg dust mite (D.farinae) and the vertical pattern dust mite (D. It can be seen that it is effective in suppressing ticks by showing% repellency.

In the above, a preferred embodiment of the present invention has been described, but those of ordinary skill in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. I will be able to. Therefore, it should be understood that the exemplary embodiment described above is illustrative in all respects and is not limiting.

100; Plastic substrate 200; Primer layer
300; Epoxy layer 400; Coating layer

Claims (1)

To prepare a plastic substrate 100,
To form a primer layer 200 on the plastic substrate 100,
To form an epoxy layer 300 on the primer layer 200,
To form a coating layer 400 on the epoxy layer 300,
The plastic substrate 100 is prepared with an anti-repellent substance and an additive, and the anti-repellent substances include Allethrin, Bifenthrin, Cyhalothrin, Cypermethrin, and Any one or more selected from the group consisting of Cyfluthrin is used, and the additive is 1 to 3 parts by weight of silicon dioxide nanoparticles, 0.5 to 2 parts by weight of calcined calcium, 2 to 4 parts by weight of loess, 0.5 to 1.5 parts by weight of vermiculite An extruder containing polypropylene, polyethylene, and EVA (Ethylene Vinyl Acetate Copolymer) resin prepared in a chip state into an extruder, and the polypropylene, polyethylene, and EVA resin added to the extruder, which is included in a weight ratio of 0.1 to 1 part by weight of activated carbon A polyvinylidene fluoride-based resin and a good-solvent were added to the mixture, heated to dissolve, and then a mixed resin was prepared, and the mixed resin was stirred to prepare a chip, and the chip was cooled to cut the batch chip. However, the polypropylene, polyethylene and EVA resin are mixed in a weight ratio of 25 to 35 parts by weight of polypropylene, 35 to 55 parts by weight of polyethylene and 15 to 25 parts by weight of EVA resin, respectively, and the polypropylene, polyethylene and EVA resin A mixed resin is prepared by mixing in a weight ratio of 10 to 20 parts by weight of a polyvinylidene fluoride-based resin and 15 to 25 parts by weight of a good solvent based on the total 100 parts by weight, and the extruder into which the mixed resin is added is at a temperature of 230 to 240°C Heat is applied and cooling of the chip is performed at a temperature of 55 to 65°C, and a master batch chip is prepared by mixing the batch chip with an anti-repellent substance and an additive, and the batch chip, an anti-repellent substance, and an additive are each batch chip 250 to 350 parts by weight, 5 to 10 parts by weight of anti-repellent substances and 10 to 20 parts by weight of additives are mixed in a weight ratio, heated to a temperature of 230 to 250°C to be melted, and the master batch Chips are manufactured by mixing and stirring the molten batch chips, anti-repellent substances and additives, cooling and cutting in a cooler maintaining a temperature of 40 to 50°C, and molding and pressing the master batch chips after putting them into a mold However, the master batch chip is put into a mold and then pressurized at a temperature of 220 to 240° C. and a pressure of 25 to 35 kgf/cm ² to prepare a plastic substrate 100,
The primer layer 200 is formed by mixing and mixing a primer composition in a certain weight ratio and then applying it on the plastic substrate 100, the primer composition is 50 to 100 parts by weight of acrylic emulsion resin, 10 to 20 ethylene glycol It is prepared by mixing in a weight ratio of 5 to 15 parts by weight of isocyanate and 10 to 20 parts by weight of a phosphorus monomer and putting it into a mixing tank and then uniformly mixing,
The epoxy layer 300 is formed by mixing and mixing an epoxy composition at a certain weight ratio and then applying the epoxy composition on the primer layer 200, wherein the epoxy composition is 50 to 100 parts by weight of a self-emulsifying epoxy resin , Acrylic modified polyester resin 10 to 30 parts by weight, pigment 1 to 10 parts by weight and 5 to 10 parts by weight of a curing agent is prepared by mixing and mixing in a weight ratio,
The coating layer 400 is formed by mixing and mixing a coating composition at a certain weight ratio and then applying it on the epoxy layer 300, wherein the coating composition is a UV curable coating composition, and the UV curable coating composition is epoxy After coating on the top of the layer 300, it is prepared by curing with a UV lamp of 250 to 350 mJ/cm ² in a UV coating device, and the UV curable coating composition is 20 to 40 parts by weight of urethane acrylate oligomer, filler 1 A method for manufacturing an eco-friendly functional plastic product, characterized in that it is blended and contained in a weight ratio of from 5 parts by weight and 1 to 3 parts by weight of the photoinitiator.

Images