KR100334293B1 - Functional polyethylene resin containing Japanese lacquer, and process for preparing the same - Google Patents

Abstract

The present invention relates to a functional synthetic resin blended with existing synthetic resins, in particular polyethylene, commercialized with a lacquer component excellent in flame resistance, heat resistance, waterproofness, antiseptic, insect repellent, and insulation.

The functional synthetic resin in which the lacquer component according to the present invention is mixed is dissolved in an organic solvent at a concentration of 10% by weight of the polymer material used as the synthetic resin, and then the purified lacquer sap is 20% by weight based on the weight of the polymer material. It is mixed to within% and obtained by molding and mixing the mixed solution of the polymer and lacquer sap, or by increasing the polymer material used as a synthetic resin to the polymer melting temperature to form a polymer melt, the lacquer sap of the polymer It is obtained by mixing in an amount of less than 20% by weight based on the weight, followed by stirring to form a mixed melt of polymer and lacquer, followed by melt extrusion through a slit die, followed by rapid cooling in a roller to solidify.

Lacquer-containing synthetic resin according to the present invention can be manufactured economically using the existing production facilities and production systems as it is, and has a significantly lower moisture permeability than the conventional synthetic resin, so that packaging of natural flowers or food packaging, etc. When used as a film for the freshness can be kept long.

Description

Functional polyethylene resin containing Japanese lacquer and manufacturing method thereof {Functional polyethylene resin containing Japanese lacquer, and process for preparing the same}

This invention relates to the functional synthetic resin which mixed the lacquer component. More specifically, the present invention relates to a functional polyethylene resin obtained by mixing a lacquer component having excellent flame resistance, heat resistance, waterproofness, antiseptic property, insect repellency, and insulation to commercially available synthetic resins, in particular polyethylene, and a manufacturing method thereof.

In general, various types of packaging materials are used to package products. As the material of the packaging material, paper, metal, cloth, wood, or synthetic resin is used, and the form of the packaging material is a sheet of paper or a synthetic resin film, a box or a container. The material and shape of the packaging material are selected and used according to the shape, properties and weight of the article to be packed therein, with the main purpose of protecting the article and having a good appearance.

However, when special purposes and functions are required, such as packaging of plants such as flowers and foods, it is difficult to obtain effective results with conventional packaging materials.

On the other hand, lacquer products have long been used to beautify and decorate the surface of wood such as boxes. In particular, lacquer is a kind of natural resin, has the advantages of excellent flame resistance, heat resistance, waterproofing, antiseptic, insect repellent and insulation, and is particularly well known for excellent preservation.

When packing an article with a functional synthetic resin mixed with such a lacquer component, it is excellent in heat resistance, antiseptic, antimicrobial and insulation properties, so that it is possible to extend the life of the article or to maintain its function for a long time depending on the nature of the contents. It is considered to be. For example, when packaging with low moisture permeability and excellent antimicrobial packaging, fresh flowers can maintain freshness longer than conventional packaging materials and can be stored for longer periods of time without food preservatives. Silver sap is collected by coating the sap of the lacquer and apply it to the surface of the adherend and dried, it is well known that if the resources of the lacquer is secured, there are few problems such as causing pollution and it is environmentally friendly and good for health. (See Heo Joon's Consent, and Kim Il Hoon's New Testament.)

However, all of the conventional lacquer has been applied to only the surface of hard products such as wood and metal, and has been used, and efforts to convert it to various uses have been neglected.

The present invention is mixed with a polyethylene resin solution and a lacquer solution so that it can be easily applied in various forms, reconstituted with a functional synthetic resin mixed with a lacquer component, and then used as a resin product of various uses, lacquer component-containing functional polyethylene resin and It aims at providing the manufacturing method.

1 is a view showing the results of the antibacterial properties of the lacquer sap used in the present invention.

Figure 2 is a view showing the moisture permeability measurement results of the lacquer component-containing functional polyethylene prepared according to the present invention.

According to an embodiment of the present invention, 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 polymer A lacquer component-containing functional synthetic resin is obtained, which is obtained by molding and then mixing a mixed solution of the lacquer sap.

In order to remove the residual solvent in the synthetic resin as described above, it is preferably stored in a vacuum dryer at a temperature of 35-40 ° C. for at least one day, and finally heat treatment while raising the temperature to 150 ° C. at about 1 ° C. per minute for about 2 hours 30 minutes. After that, the mixture is gradually cooled to room temperature.

According to another embodiment of the present invention, a polymer material used as a synthetic resin is placed in a hopper and raised to a polymer melting temperature (about 150-200 ° C.) to form a polymer melt, and the lacquer sap is 20 weight based on the weight of the polymer. After mixing in an amount within% and stirring to form a mixed melt of polymer and lacquer, melt extrusion through a slit die, and then wound in a roller rotating at a speed greater than the extrusion speed, rapidly cooled to solidify, then wound in a windup The lacquer component containing functional synthetic resin obtained by making is provided is provided.

Further, according to the present invention, after dissolving the polymer material used as a synthetic resin in an organic solvent at a concentration of 10% by weight, mixing the purified lacquer sap within 20% by weight based on the weight of the polymer material, and the polymer There is provided a method for producing a lacquer component-containing functional synthetic resin, comprising the step of molding and then mixing the mixed solution of the lacquer sap.

In order to remove the residual solvent in the synthetic resin as described above, the method of the present invention is preferably stored at a temperature of 35-40 ° C. or more in a vacuum dryer for at least one day, and finally 150 ° C. at about 1 ° C. per minute for about 2 hours 30 minutes. After the heat treatment while raising the temperature to, further comprising the step of gradually cooling to room temperature.

According to another embodiment of the present invention, a polymer material used as a synthetic resin is placed in a hopper and raised to a polymer melting temperature (about 150-200 ° C.) to form a polymer melt, the lacquer sap based on the weight of the polymer 20 After mixing in an amount of less than weight% by stirring to produce a mixed melt of polymer and lacquer, and melt-extruded through a slit die, it is wound on a roller that rotates at a speed greater than the extrusion speed, then rapidly cooled to solidify and wind up Provided is a method for producing a lacquer component-containing functional synthetic resin, comprising the step of being wound on.

The synthetic resin may be selected from polymers such as polyethylene, polyvinyl chloride, polystyrene, polysulfone, epoxy (FRV), polyethylene terephthalate (PET), and the like, which are generally widely used industrial materials. Such a synthetic resin film is mainly a film of a thermoplastic resin, and has excellent transparency and flexibility. An adhesive film coated with an adhesive on the back surface may be selected as the synthetic resin film. In particular, in the present invention, by using polyethylene as the synthetic resin, the lacquer component is contained, so that the moisture permeability is remarkably lowered, thereby providing a lacquer component-containing polyethylene resin that can be usefully used as a packaging film.

The superiority of the lacquer component can be easily understood by those skilled in the art. The excellence of the coating obtained by applying the natural resin extracted from the lacquer tree is widely known, and the lacquer coating protects the internal materials and the health of the user even in harsh environments such as pollution. And good aesthetics.

In particular, in view of the health of the user, lacquer is known to have excellent stability to the human body to the extent that it has been applied to the surface of wooden containers and used as tableware products since ancient times. It is understood that this is due to the preservative, antibacterial and heat resistance of the lacquer. Functional resin container containing lacquer component according to the present invention can escape from the fear of environmental hormones of conventional synthetic resin products due to excellent antiseptic and antibacterial properties and heat resistance, and general synthetic resin containers are mainly made of petrochemical products, which is harmful to human body In view of including a large number of substances, it can be said that the stability to health is more excellent. This aspect is also confirmed by the successful extraction of MU2, which is more effective than conventional anticancer drugs.

The function of the lacquer, that is, heat resistance, waterproof, antiseptic, antibacterial and insulating properties are those that can be recognized in the efficacy of the lacquer used in the past, the efficacy of the lacquer using a functional synthetic resin mixed with such a lacquer component It can be applied to the packaging as it is. Particularly, as a result of the applicant's experiment, it was observed that the freshness of the contents could be maintained for a long time by using the functional synthetic resin film of the present invention in the packaging of fresh flowers, the packaging of food, and the like. By producing a functional synthetic resin by mixing with a resin, in particular polyethylene, a functional synthetic resin containing clothes may be attached to the surface of a conventional packaging material made of paper, metal, cloth, wood or synthetic resin, or used as a packaging material. The functional synthetic resin mixed with the components can be utilized as a packaging material. The functional synthetic resin mixed with the lacquer component according to the present invention can realize the functions of the lacquer itself, that is, heat resistance, waterproofing, antiseptic, antimicrobial and insulating properties, etc. In particular, the lacquer-containing polyethylene film according to the present invention Since it shows a significantly lower moisture permeability compared to a polyethylene film containing no lacquer component (see Fig. 2), it can be usefully used as a packaging material for foods, etc. In addition, the functional synthetic resin mixed with the lacquer component according to the present invention is used indoors. In the decoration of the space can be used as a decorative material such as flooring or wallpaper. As shown in Fig. 1, the lacquer component exhibits an effective coping ability against penetration of bacteria and viruses. In Germany, lacquer is applied to the inside of submarines to protect against cold and virus infection and corrosion. When the synthetic resin mixed with lacquer is applied to general flooring, wall paper or industrial materials, it is observed that heat resistance is higher than that of general synthetic resins, so that it is not easily burned and generates much less toxic gas emissions even when burned. Therefore, such a functional synthetic resin can be used not only as wallpaper or floor decoration material, but also as a construction industry material.

In addition, the functional synthetic resin containing the lacquer component can be used to produce general household products without the addition or modification of a separate production process, it is believed that the household products produced in this way will have an excellent function.

Antiseptic, antibacterial and heat resistance and anti-cancer component (MU2) of functional synthetic resin mixed with lacquer component can compensate for the fatal disadvantages such as the detection of carcinogen component of conventional synthetic resin products and free from fear of environmental hormone Can be.

EXAMPLE

The present invention will be described in more detail with reference to the following examples. However, the present invention is not limited to these examples. Example 1: Mixing by Dissolution

First, the polymer material is dissolved in an organic solvent (eg, cyclonucleic acid, chloroform) at a concentration of 10% by weight, and then purified lacquer sap based on the weight of the polymer material is 1%, 2%, 3%, Mix 4% and 5%. The mixed solution is stored in the refrigerating chamber for at least one day to suppress evaporation of the solvent and to remove bubbles from the solution.

The mixed solution of the polymer and the lacquer sap is cast on a clean glass plate, and this is dried for at least one day in a nitrogen atmosphere to prepare a film. In order to remove the remaining solvent in the prepared film, it is stored at 35-40 ° C. in a vacuum dryer for at least one day and finally heat treated at 150 ° C. for about 2 hours 30 minutes while raising the temperature to about 1 ° C. per minute, and then gradually room temperature (25 Cooled to) to produce a lacquer component-containing synthetic resin. Example 2: Preparation of Lac-Containing Polyethylene Films by Melt Mixing

Low density polyethylene (LDPE) is placed in a hopper and raised to a melting temperature (about 150-200 ° C.) to form a polymer melt. To this, lacquer sap is mixed in a desired weight ratio (1%, 2%, 3%, 4%, 5%) and stirred well to prepare a polyethylene-lacto mixed melt. The mixed melt is melt extruded through a slit die and wound in a roller rotating at a speed greater than the extrusion speed to rapidly cool, solidify, and then wind up in a windup to produce a film. At this time, the distance between the exit of the die and the roller is made as short as possible to produce a film of a certain thickness.

The low density polyethylene film produced is colorless transparent and very flexible. As the lacquer is added, the color of the film gradually becomes brown, which is the intrinsic color of the lacquer, and a relatively transparent film is obtained within the experimental range (1-5% by weight). However, when the lacquer is no longer added, the transparency of the film is poor. In view of the transparency of the film, lacquer has a very high compatibility with low density polyethylene, the main material of the packaging material.

The water vapor transmission rate of the obtained low density polyethylene film was measured as follows according to Industrial Promotion Agency Notification No. 94-882 (KS M 3000, KS A 1023, KS M 3090, KS M 3091).

One side of the film to be measured is saturated with water vapor and the other side is set to a constant relative humidity, and the amount of water vapor that has passed through the film is measured by a humidity sensor. The permeation area of the film is kept constant at 5 cm ² , the thickness of the film is about 0.12 mm, and the water vapor permeability is determined after confirming the steady state of the rate of humidity change with the permeation time.

The measurement temperature is carried out at 25 ℃ for a week or more (see Fig. 2), the moisture permeability of the film measurement results, as shown in Figure 2, the moisture permeability is reduced as the addition of the lacquer in the film. Depending on the amount of lacquer sap added (1%, 2%, 3%, 4%, 5%), the moisture permeability of the film decreases 2.83%, 4.47%, 5.65%, 6.59%, and 7.06%, respectively.

As shown in the above results, the lacquer contained in the film imparts waterproofing properties and increases the waterproofing power of the existing vinyl packaging material.

Reference Example 1: Antimicrobial Activity of Lacquer

Escherichia coli (E. coli) is used to measure the antibacterial properties of lacquer, and E. coli is measured using the spread plate method, a well-known measurement method. First, E. coli is incubated for 24 hours under conditions of 37 ° C. in LB (Luria-Bertani (Life Saving)) liquid medium (bactotrypsin 10 g / L, yeast extract 5 g / L, sodium chloride 10 g / L). The E. coli culture thus obtained was diluted 10,000-100,000 times with purified water, and then 0.1 mm taken to obtain LB solid medium containing 0, 1, 2, 3, 4, 5% by weight of lactose (10 g / L bactotrypsin, Spread it on the surface of the yeast extract 5 g / L, NaC1 10 g / L) and uniformly apply using a glass rod.

After incubating at 37 ° C. for 24 hours, the colony of Escherichia coli generated in the solid medium was observed under a microscope, and the antibacterial activity of lacquer was evaluated by measuring the colon bacillus count. The killing rate of Escherichia coli is calculated by the following equation.

% Mortality = (A-B / A) × 100

In the formula, A means the number of E. coli colonies in the LB solid medium without lacquer, B means the number of E. coli colonies in the LB solid medium with lacquer added.

As a result of measuring the antibacterial properties of the lacquer component, as shown in FIG. 1, the killing rate of E. coli was increased to 3%, 7%, 8%, 10%, and 11% as 1-5% by weight of the lacquer component was added. have.

As shown from the experimental results of the above embodiment, the lacquer component-containing synthetic resin according to the present invention can be economically manufactured using the existing production facilities and production systems as it is, and has a significantly lower moisture permeability than the conventional synthetic resin When used as a film for packaging of fresh flowers or packaging of food, freshness can be maintained for a long time.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical spirit of the present invention, and such modifications and modifications belong to the appended claims. .

Claims (6)

delete delete The polyethylene resin was placed in a hopper to raise the melting temperature to form a polymer melt, and the lacquer sap was mixed in an amount within 20% by weight based on the weight of the polymer, followed by stirring to form a mixed melt of the polymer and lacquer. A lacquer-containing functional polyethylene resin obtained by melt extrusion through a slit die, and then wound by a roller rotating at a speed greater than the extrusion speed, rapidly cooled to solidify, and then wound into a windup. delete delete Putting a polyethylene resin in a hopper to raise the melting temperature to form a polymer melt, mixing the lacquer sap in an amount within 20% by weight based on the weight of the polymer, followed by stirring to produce a mixed melt of the polymer and lacquer, And melting and extruding it through a slit die, followed by winding in a roller rotating at a speed greater than the extrusion speed, rapidly cooling to solidify, and winding the resultant in a wind-up.