KR100734913B1 - Production method of molding mixture of synthetic resin using urushi lacquer mixture and molding mixture of synthetic resin produced by thereof - Google Patents

Abstract

The present invention relates to a method for preparing a synthetic resin mixture injection product using an ink and lacquer liquid mixture, and to a synthetic resin mixture injection material prepared by the above method, and more specifically, to a process of mixing a synthetic resin, ink and lacquer liquid, and flattening the mixture. The present invention relates to a method for preparing a synthetic resin mixed injection product using an ink and lacquer mixed liquid including a drying step, a pulverization step of the dried mixture, and an injection step of the pulverized product, and a synthetic resin mixed injection product manufactured by the method.

Synthetic resin mixture injection molding method according to the present invention is not only low concentration but also containing a high concentration of the lacquer component of more than 20% by weight can be produced a synthetic resin mixture injection molding of various colors, the mixture injection produced by the above method is far infrared Excellent emissivity, antimicrobial and durability and high hardness, it can be applied to a variety of materials such as TVs, mobile phones, notebook computers, automotive interiors, building materials, various cases.

Ink, lacquer, synthetic resin, mixed injection molding,

Description

Production Method of Synthetic Resin Mixture Injection Using Ink and Lacquer Mixture and Synthetic Resin Injection Molded by the Method {PRODUCTION METHOD OF MOLDING MIXTURE OF SYNTHETIC RESIN

1 is a photograph of an injection molded product prepared using a pigment powder, a lacquer mixture and a nylon resin by the method of the present invention.

2 is a photograph of an injection molded product prepared using a pigment powder, a lacquer mixture and an acrylic resin by the method of the present invention.

Figure 3 is a photograph of the injection molding prepared by using the pigment powder and lacquer mixture and ABS resin by the method of the present invention.

The present invention relates to a method for preparing a synthetic resin mixed injection product using an ink and lacquer liquid mixture, and to a synthetic resin mixed injection material prepared by the above method, and more specifically, to a process of mixing a synthetic resin, a lacquer liquid and an ink, and flattening the mixture. The present invention relates to a method for preparing a synthetic resin mixed injection product using an ink and lacquer liquid mixture comprising a drying step, a pulverization step of the dried mixture, and an injection step of the pulverized product, and a synthetic resin mixed injection material produced by the method.

Raw lacquer or lacquer from the lacquer tree contains 55-66% urushiol, 25-30% water, 5-10% monosaccharides and polysaccharides, 3-5% nitrogen-containing substances, small amounts of laccase, stellar It is known to contain enzymes such as stelcyanin and peroxidase. Lacquer is a kind of natural resin that has been used in thousands of years in Korea, China and Japan, mainly applied to wooden products, and has been used in large quantities in the production of daily necessities such as cabinets, bowls, cutlery, and tableware. It is a well-known fact that it has the advantage of excellent insect repellency and insulation, and especially excellent storage.

Recently, efforts have been made to produce functional polyethylene resins containing a lacquer component (Korean Patent Laid-Open No. 2000-0024493). Specifically, after dissolving the polymer material used as a synthetic resin in an organic solvent at a concentration of 10% by weight, the purified lacquer sap is mixed within 20% by weight based on the weight of the polymer material, the mixed solution of the polymer and lacquer sap After molding, and dried or obtained by increasing the polymer material used as a synthetic resin to the polymer melting temperature to form a polymer melt, and mixed with the lacquer sap in an amount of less than 20% by weight based on the weight of the polymer and stirred After producing a mixed melt of the polymer and lacquer, it is obtained by melt extruding it through a slit die, and then solidified by cooling rapidly in a roller.

However, the method has a disadvantage in that it is not easy to add a wide range of lacquer solution to exhibit the inherent effect of the lacquer component because the addition of the lacquer in less than 20% by weight in order to achieve a good mixing of the polymer and the lacquer solution.

The present invention has been made to solve the problems of the prior art,

It is an object of the present invention to provide a method for producing a synthetic resin-mixed injection product using a mixture of ink and a lacquer solution that can be mixed with an ink to stably mix with the resin even in the addition of a high concentration of lacquer liquid, and can be mixed with ink to express various colors. .

Still another object of the present invention is to provide a mixed injection product of a synthetic resin using an ink and lacquer liquid mixture prepared by the above method, which has excellent absorption of harmful electromagnetic waves, far-infrared emissivity, antibacterial and durability.

Mixed injection method of the synthetic resin using the ink and lacquer liquid mixture according to the present invention for achieving the above technical problem, 30 to 90% by weight filtered lacquer liquid and 3 to 70% by weight of the mixed resin pellets or powder Mixing process; Drying the mixture at 100 to 160 ° C. for 3 to 5 hours by flattening the mixture to a thickness of 2 to 5 mm; Grinding of the dried mixture to a size of 2 to 300 mesh; And an injection process for injection molding the pulverized product.

Hereinafter, the present invention will be described in more detail.

The synthetic resin applied to the present invention includes polyethylene terphthalate (PET), polypropylene (PP), polystyrene (PS), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC) , ABS resin (acrylonitrile butadiene styrene copolymer), fluororesin, nylon resin, acrylic resin, polyvinyl acetate resin, polyamide resin, acetal resin, polycarbonate (PC), polyphenylene oxide, polyester, polysulfone Synthetic resins, such as these, are possible, and it is preferable that they are ABS resin, a nylon resin, or an acrylic resin. The synthetic resin is produced in the form of pellets or powder. Since the synthetic resins have a lot of dust because static electricity is generated as a whole, it is usual to print while removing dust at all during a printing operation. In order to solve this problem, the latest equipment is equipped with an antistatic treatment, and there is a method of using an antistatic agent.

The lacquer used in the present invention is not subject to the origin of Korea, China, Japan, Southeast Asia, etc., and these lacquer liquids may show some differences in composition depending on the origin, but all can be applied. The lacquer liquid used in the present invention is used after filtration with filter paper to remove impurities, and 30 to 90% by weight of the filtered lacquer liquid and 3 to 70% by weight of the ink are compared with 100% by weight of the synthetic resin pellets or powder. In addition, the addition of the ink enables the production of mixed injections that can express various colors while containing the lacquer component, and in this case, it is preferable to use a pigment powder that is a raw material of the ink for ease of mixing and clarity of color. .

The mixture is then flattened to a thickness of 2-5 mm and dried at 100-160 ° C. for 3-5 hours. Coating of the synthetic resin pellets or powders by the lacquer liquid by the viscosity of the lacquer liquid itself, but if the content of the lacquer is mixed in excess of 20% by weight, there is a problem in that no further melt mixing with the synthetic resin pellets or powder. Therefore, the present inventors flatten and dry after mixing the lacquer and the synthetic resin pellets or powder in order to produce a synthetic resin containing a high concentration of lacquer in order to maximize the effect of the lacquer component.

The dried mixture is subjected to a grinding step of grinding to a size of 2 ~ 300 mesh (mesh) using a grinder, and then the injection into the injection molding machine to put the powder into an injection molding machine. At this time, the injection process is preferably carried out at an injection pressure of 40 ~ 60 kg / ㎠, injection speed of 30 to 40%, a cooling time of 20 to 50 seconds and a temperature of 180 ~ 260 ℃.

In addition, the present invention provides a synthetic resin mixed injection product containing the ink and lacquer liquid mixture prepared by the above method. Synthetic resin mixture injection containing the ink and lacquer liquid mixture prepared by the above method is excellent in absorbing harmful electromagnetic waves, far-infrared emissivity, antibacterial and durability, such as TV, mobile phone, notebook computer, automobile interior, building materials, various cases, etc. It can be applied to various materials.

Hereinafter, the configuration of the present invention will be described in detail through examples, test examples and tables. However, the scope of the present invention is not limited to the claims of the present invention by the following examples, test examples and tables.

Example 1 Mixed Injection Method of Pigment, Lacquer Mixture and Nylon Resin

1-1. Injection molding of synthetic resin using yellow pigment and lacquer mixture

700 g of nylon resin (WH1002GY, Gongyoung Plastice Co., Ltd.), 210 g of lacquer and 30 g of yellow pigment (CD YELLOW, Suwon Pigment) were mixed, and then the mixture was flattened on an aluminum plate with a thickness of 2 to 5 mm for 5 hours. During drying at 160 ° C. The dried product is pulverized to a size of 2 to 300 mesh with a grinder (2MP, reinforcing grinder), and then 50 kg / ㎠ injection pressure and 48% injection pressure at a temperature of 260 ° C. with an injection molding machine (Toggle-type). A cosmetic case was prepared by injection molding at a speed and a cooling time of 35 seconds (see FIG. 1A).

1-2. Injection Molding of Synthetic Resin Using Red Pigment and Lacquer Mixture

700 g of nylon resin (WH1002GY, Gongyoung Platech Co., Ltd.), 210 g of lacquer and 30 g of red pigment (CD RED, Suwon Pigment) were mixed, and then the mixture was flattened on an aluminum plate with a thickness of 2 to 5 mm. Dry at 160 ° C. for hours. The dried product is pulverized to a size of 2 to 300 mesh with a grinder (2MP, reinforcing grinder), and then 50 kg / ㎠ injection pressure and 48% injection pressure at a temperature of 260 ° C. with an injection molding machine (Toggle-type). A cosmetic case was prepared by injection molding at a speed and a cooling time of 35 seconds (see FIG. 1B).

Example 2 Mixed Injection Method of Pigment, Lacquer Mixture, and Acrylic Resin

2-1. Injection molding of synthetic resin using yellow pigment and lacquer mixture

700 g of acrylic resin (LG Chemical Co., Ltd.), 210 g of lacquer, and 30 g of yellow pigment (CD YELLOW, Suwon Pigment) were mixed, and then the mixture was flattened on an aluminum plate with a thickness of 2 to 5 mm to 160 ° C for 5 hours. Dried at. The dried product was pulverized to a size of 2 to 300 mesh with a grinder (2MP, reinforcing grinder), followed by an injection molding machine (Toggle-type, Dongshin Hydraulic Pressure) at a temperature of 200 ° C. at 55 kg / ㎠ and an injection pressure of 40%. A cosmetic case was prepared by injection molding at a speed and a cooling time of 20 seconds (see FIG. 2A).

2-2. Injection Molding of Synthetic Resin Using Red Pigment and Lacquer Mixture

700 g of acrylic resin (LG Chemical Co., Ltd.), 210 g of lacquer and 30 g of red pigment (CD RED, Suwon Pigment) were mixed, and then the mixture was flattened on an aluminum plate with a thickness of 2 to 5 mm for 160 hours for 5 hours. Dried at ° C. The dried product was pulverized to a size of 2 to 300 mesh with a grinder (2MP, reinforcing grinder), followed by an injection molding machine (Toggle-type, Dongshin Hydraulic Pressure) at a temperature of 200 ° C. at 55 kg / ㎠ and an injection pressure of 40%. A cosmetic case was prepared by injection molding at a speed and a cooling time of 20 seconds (see FIG. 2B).

Example 3 Mixed Injection Method of Pigment, Lacquer Mixture, and ABS Resin

3-1. Injection molding of synthetic resin using yellow pigment and lacquer mixture

700 g of ABS resin (MP-211, Korea Engineering Plastics Co., Ltd.), 210 g of lacquer, and 30 g of yellow pigment (CD YELLOW, Suwon Pigment) were mixed, and then the mixture was flattened on an aluminum plate with a thickness of 2 to 5 mm. Dry at 160 ° C. for 5 hours. The dried product was pulverized to a size of 2 to 300 mesh with a grinder (2MP, reinforcing grinder), and then 50 kg / ㎠ injection pressure and 35% injection at a temperature of 200 ° C. with an injection molding machine (Toggle-type). Injection molding was performed at a speed of 20 seconds and a cooling time (see FIG. 3A).

3-2. Injection Molding of Synthetic Resin Using Red Pigment and Lacquer Mixture

700 g of ABS resin (MP-211, Korea Engineering Plastics Co., Ltd.), 210 g of lacquer, and 30 g of red pigment (CD RED, Suwon Pigment) were mixed, and then the mixture was flattened on an aluminum plate with a thickness of 2 to 5 mm. Dried at 160 ° C. for 5 hours. The dried product was pulverized to a size of 2 to 300 mesh with a grinder (2MP, reinforcing grinder), and then 50 kg / ㎠ injection pressure and 35% injection at a temperature of 200 ° C. with an injection molding machine (Toggle-type). Injection molding was performed at a speed of 20 seconds and a cooling time (see FIG. 3B).

Test Example 1. Far Infrared Radiation Effect Test

The present inventors performed the far-infrared emissivity emitted from the ABS mixed injection prepared in Example 3-2 by requesting the Korea Far Infrared Application Evaluation Institute (KIFA).

Specifically, as a result of measuring the black body using a FT-IR spectrometer at 37 ℃ compared to the black body (black body) it was confirmed that the excellent far-infrared emissivity as shown in Table 1 below.

Emissivity (5 ~ 20㎛) Radiation energy (W / ㎡ · ㎛, 37 ℃) 0.801 3.1 x 10 ²

Test Example 2 Antibacterial Effect Test

The present inventors carried out the antibacterial test for the ABS mixture injection prepared in Example 3-2 by the Korea Research Institute for Chemical Testing. The test strains used were Escherichia coli ATCC 8739 and Staphylococcus aureus ATCC 6538.

Test Items sample Result Test Methods E. coli A 3.6 x 10 ⁵ CFU / Sample ZIS Z 2801: 2000 B 1.3 x 10 ⁷ CFU / Sample C <100 CFU / sample Antimicrobial activity 5.1 and above S. aureus A 2.0 x 10 ⁵ CFU / Sample ZIS Z 2801: 2000 B 3.3 x 10 ⁵ CFU / Sample C <100 CFU / sample Antimicrobial activity 3.5 or more

At this time, A is the initial number of bacteria (average value) of the control specimen, B is the strain (average value) of the control specimen after 24 hours culture, C is the number of bacteria (average value) in the polyethylene terphthalate resin prepared according to the present invention after 24 hours culture ), And the antimicrobial activity value (log (B / C)) is the log (B / A) minus log (C / A).

As shown in Table 2, it can be seen that the ABS mixture injection molding produced by the present invention showed excellent antimicrobial activity.

The above-described examples, test examples and drawings are merely for the purpose of describing the contents of the invention in detail, and are not intended to limit the scope of the technical idea of the invention. As those skilled in the art, various substitutions, modifications and changes are possible within the scope without departing from the spirit of the present invention is not limited to the embodiments and the accompanying drawings, as well as the claims described below It should be determined that the claims are included in their equality.

The method of manufacturing a synthetic resin mixed injection according to the present invention described above is capable of producing a synthetic resin mixed injection capable of expressing various colors while containing lacquer with a high concentration of 20% by weight or more as well as low concentration, and the mixture prepared by the above method. Since the injection molding product has excellent far-infrared emissivity, antibacterial property and durability and high hardness, it can be applied to various materials such as TVs, mobile phones, notebook computers, automobile interior materials, building materials, and various cases.

Claims (4)

A mixing process of mixing 30 to 90 wt% of the filtered lacquer liquid and 3 to 70 wt% of the ink with respect to 100 wt% of the synthetic resin pellet or powder; Drying the mixture at 100 to 160 ° C. for 3 to 5 hours by flattening the mixture to a thickness of 2 to 5 mm; Grinding of the dried mixture to a size of 2 to 300 mesh; And Method of producing a synthetic resin mixture injection molding containing a lacquer component comprising an injection process for injection molding the pulverized product. The method of claim 1, The synthetic resin, Polyethylene terphthalate (PET), polypropylene (PP), polystyrene (PS), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), ABS resin (acrylonitrile butadiene styrene copolymer), fluororesin, nylon resin, acrylic resin, polyvinyl acetate resin, polyamide resin, acetal resin, polycarbonate (PC), polyphenylene oxide, polyester or polysulfone A method for producing a synthetic resin mixed injection product containing a lacquer component. The method of claim 1, The injection process, A method for producing a synthetic resin mixed injection product containing a lacquer component, characterized in that it is carried out at an injection pressure of 40 to 60 kg / cm 2, an injection speed of 30 to 40%, a cooling time of 20 to 50 seconds, and a temperature of 180 to 260 ° C. A synthetic resin-mixed injection product containing a lacquer component prepared by the method of any one of claims 1 to 3.

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