KR20200049983A - Preparing Method Polymer Containing Phytoncide And Nanoclay For Fresh Container And Fresh Packaging Materials - Google Patents

Abstract

The present invention relates to a method for preparing an eco-friendly functional polymer for freshness keeping containers and packaging materials, the polymer containing phytoncide, nanoclay and zeolite. The polymer according to the present invention not only exhibits an antimicrobial effect by containing a wood-based phytoncide component, but also has excellent gas barrier properties by including nanoclay, and has an effect of improving deodorizing properties by using zeolite.

Description

Preparing Method Polymer Containing Phytoncide And Nanoclay For Fresh Container And Fresh Packaging Materials}

The present invention relates to a method for producing an eco-friendly functional polymer for freshness keeping containers and packaging materials containing phytoncide, nanoclay and zeolite.

Petroleum-based plastic materials are widely used for various molded products, packaging materials, industrial materials, and consumer goods due to their excellent physical properties, various functions, and low prices, but these products are not decomposed naturally within a reasonable period of time and are emerging as a cause of serious environmental pollution. It releases environmental hormones such as, bisphenol-A, and has been found to cause harm to the health of the user.

As a method for treating such petroleum-based plastic wastes, methods such as landfill, incineration, and recycling have been conventionally used, but due to the problems associated with each of these, degradable plastics that can be completely decomposed into water, carbon dioxide, methane gas, etc. Research has been conducted in a variety of ways.

Degradable plastics are largely biodegradable plastics (bio-degradable plastics) in which plastic decomposition is caused by microorganisms, enzymes, etc., and photochemical and thermal reactions caused by solar and solar radiation (chemical bond cleavage) Oxidation-Degradable Plastic where plastic decomposition occurs by oxidation reaction due to the influence of temperature, etc., and hydrolysis where decomposition occurs by hydrolysis reaction It can be classified as a plastic (Hydrolytically-Degradable Plastic), and among these, research on biodegradable, photodegradable plastics or composite degradable plastics is most actively conducted. For example, in order to reduce the use of petroleum-based plastics, a technique of mixing powders of vegetable wastes, such as coffee, rice husk, and wheat husks, into plastics has been developed, but the physical properties of the final product are deteriorated, and recycling after use is valuable There was a problem.

Accordingly, there is a need to develop a degradable plastic capable of securing physical properties such as tensile strength and impact strength in the final product.

On the other hand, in recent years, according to consumers' preference for eco-friendly products, the purchasing tendency of eco-friendly material products is increasing, and eco-friendly products having functional properties such as antibacterial properties are under development.

In particular, studies on phytoncide as a natural material capable of imparting antimicrobial activity are being conducted. In Korean Patent No. 10-1305384, a method of manufacturing a phytoncide gel composition is disclosed, and in Korean Patent No. 10-1152684 An air purifier with a type phytoncide is disclosed.

However, phytoncide is not a single component, and it is a mixture of 50 or more kinds of melting points and different solubility components, making it very difficult to control the composition and release rate. Therefore, if the direction density of the phytoncide is excessively high because there is a difference in the emitted material and the speed, there is a problem that is harmful to the human body, and a technique for storing the phytoncide and continuously implementing phytoncide is required.

Korean Registered Patent No. 10-1305384 Korean Registered Patent No. 10-1152684

The present invention has been devised to solve the above problems, and an object of the present invention is to provide a method for manufacturing an eco-friendly polymer plastic for food containers capable of securing antimicrobial properties and durability.

In order to achieve the above object, the present invention comprises the steps of mixing a phytoncide-containing wood-based powder and polyolefin to prepare a wood powder-based powder mixture; Preparing a zeolite mixture by mixing zeolite and nanoclay; Mixing the wood flour-based powder mixture, the zeolite mixture, a polyolefin, a compatibilizer, and a lubricant at 80 to 90 ° C., and mixing the wood flour-based zeolite mixture; And extruding the wood-based powder-zeolite mixture at a pressure of 3 to 6 kgf / cm² at 200 to 300 ° C. and cooling to dry to form pellets; providing a method for preparing a polymer for fresh containers and packaging materials .

As the compatibilizing agent of the present invention, one or a mixture of two or more selected from the group consisting of glycidyl methacrylate, ethylene vinyl alcohol, polyvinyl alcohol and ethylene vinyl acetate may be used.

As the lubricant of the present invention, any one or a mixture of two or more selected from the group consisting of stearate, palmitate and laurate may be used.

As the wood-based powder containing phytoncide of the present invention, one or two or more types of pine, fir, globular, cedar, white and white cypress trees can be used.

The polyolefin of the present invention may use polyethylene or polypropylene and mixtures thereof.

In addition, in order to achieve the above object, the present invention comprises the steps of preparing a zeolite mixture by mixing the zeolite and nanoclay; Preparing a wood flour powder mixture by mixing phytoncide-containing wood flour powder and polyolefin; Mixing the wood flour-based powder mixture, the zeolite mixture, a polyolefin, a compatibilizer, and a lubricant at 80 to 90 ° C., and mixing the wood flour-based zeolite mixture; And extruding the wood-based powder-zeolite mixture at a pressure of 3 to 6 kgf / cm² at 200 to 300 ° C. and cooling to dry to form pellets; providing a method for preparing a polymer for fresh containers and packaging materials .

The polymer plastic according to the present invention not only exhibits an antimicrobial effect by containing a wood-based phytoncide component, but also has excellent gas barrier properties, including nanoclays, and is capable of improving deodorization properties using zeolite.

In addition, the present invention is a resin / fiber-based wood-based powder and polyolefin mixed, by mixing a mineral-based zeolite and nanoclay, to facilitate dispersion, it is possible to produce a uniform polymer.

1 is a flow chart for a manufacturing method according to an embodiment of the present invention.
Figure 2 is a flow chart for a manufacturing method according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail. Terms or words used in the present specification and claims should not be interpreted as being limited to a conventional or dictionary meaning, and the inventor may appropriately define the concept of terms to describe his or her invention in the best way. Based on the principle that it should be interpreted as meanings and concepts consistent with the technical spirit of the present invention.

The method for preparing a polymer for fresh containers and packaging materials of the present invention comprises the steps of: mixing phytoncide-containing wood-based powder and polyolefin to prepare a wood-powder-based powder mixture; Preparing a zeolite mixture by mixing zeolite and nanoclay; Mixing the wood flour-based powder mixture, the zeolite mixture, a polyolefin, a compatibilizer, and a lubricant at 80 to 90 ° C., and mixing the wood flour-based zeolite mixture; And extruding the wood flour-based zeolite mixture at a pressure of 3 to 6 kgf / cm 2 at 200 to 300 ° C. and cooling to dry to make pellets.

First, a wood-based powder mixture is prepared by mixing phytoncide-containing wood-based powder and polyolefin.

The wood-based system containing the phytoncide may be any one of pine, fir, gypsum, cedar, cypress, and cypress, or a mixture thereof, and is not limited to the tree, and all trees that contain a large amount of phytoncide Can be used

Phytoncide is a chemical mixture released by plants to combat pests, fungi, and germs. It has antibacterial and antiseptic functions, and is known for its anti-allergic and anti-cancer effects. In particular, the phytoncide released from the cypress family, Cypress, has excellent antibacterial and natural healing powers, so the extracts from the cypress or the cypress fragments are used for indoor environment purification or for the treatment of patients related to the atmosphere, such as atopy.

The wood-based powder may be prepared by crushing wood containing a large amount of phytoncide to an appropriate size. For example, it may be pulverized to a size of 200 to 400 mesh, and preferably pulverized to a size of 300 mesh. At this time, if the particle size of the wood powder is too small, handling may be difficult, and if it is too large, the extraction rate of the phytoncide component may be lowered.

The phytoncide-containing wood-based powder requires a drying process to control the moisture content, and the water content of the dried phytoncide-containing wood-based powder is preferably 5% to 15% .

The phytoncide-containing wood-based powder is composed of fibers, and the properties are similar to those of the polyolefin, which is a resin, so mixing is good. Due to the mixing with the polyolefin, the aggregation of the wood-based powder containing phytoncide may be alleviated.

Since the phytoncide component contained in the wood-based powder is volatile, it volatilizes over time and gradually disappears. Since the polyolefin mixed with the wood-based powder serves to hold the phytoncide component, it is possible to alleviate the volatility of the phytoncide component.

In addition, since the wood-based powder is a material derived from natural products, variations in properties of materials may occur, and uniform quality can be achieved by controlling the content of polyolefin to be mixed. At this time, the content of the polyolefin is preferably 10 to 30 parts by weight compared to 100 parts by weight of wood-based powder.

The polyolefin may be polyethylene or polypropylene and a mixture thereof, and is not particularly limited thereto.

Thereafter, a zeolite mixture is prepared by mixing the zeolite and the nanoclay. However, depending on the situation, the zeolite mixture may be mixed with the zeolite and the nanoclay to prepare a wood flour-based powder mixture prior to preparation.

Zeolite, a microporous aluminum silicate mineral, is mainly used as an adsorbent or catalyst. Zeolite is mainly an aluminosilicate composed of silicon, aluminum, and oxygen, and contains a small amount of metals such as titanium, tin, zinc, etc., and among microporous solids that can be used as a "molecular sieve" It is one. "Molecular sieve" is one of the unique characteristics of zeolite, and refers to a characteristic of selectively separating small-sized gas or liquid molecules according to size and shape using very regularly arranged micropores present in the zeolite structure. . The maximum size of molecules or ions that can enter the pores is determined by the size of the channels present in the zeolite, which in turn is defined by the size of the rings in the anionic framework that form the crystal structure. For example, '8-ring' means a closed ring composed of the same number of oxygen atoms as eight silicon (or aluminum) atoms forming a tetrahedral structure. These rings are not perfectly symmetrical due to various factors, including chemical bonds acting on the crystal structure, so the pores of the zeolite are rarely cylindrical.

Since these zeolites have a large number of pores, they exhibit a deodorizing effect that absorbs odors and the like.

The nanoclay is layered with a layer of magnesium, alumina, and silicon hydrochloride. For one layer of magnesium, alumina, and silicon hydrochloric acid, the length and area are tens to hundreds of nanometers, and the thickness is 1 nanometer. Since the nanoclay has a stacked structure, it has the effect of extending or interfering with the path of movement of gases such as oxygen.

The nanoclays are montmorillonite, bentonite, hectorite, saponite, beidelite, nontronite, swellable mica, vermiculite (vermicullite), synthetic mica, kanemite, magadite, kenyaite, kaolinite, smectite, illite, chlorite chlorite, muscovite, pyrophyllite, antigorite, glauconite, vermiculite, sepiolite, imogolite, bokite can be selected from the group consisting of (sobockite), nacrite, anuxite, sericite, ledikite, chrysotile, antigorite, and combinations thereof. , But is not limited thereto.

Since these zeolites and nanoclays are mineral-based components and have excellent mixing properties with each other, the two components are first mixed and used. In particular, the deodorizing properties due to the porosity of the zeolite and the gas blocking effect according to the stacking structure of the nanoclay can be complemented to each other to maximize the effect. In addition, uniform mixing is facilitated by uniformly mixing the zeolite, which is a mineral-based component, and nanoclay first, followed by phytoncide-containing wood-based powder.

Then, the wood flour-based powder mixture, the zeolite mixture, a polyolefin, a compatibilizer, and a lubricant are mixed with the wood flour-based powder-zeolite mixture at 80 to 90 ° C.

The compatibilizing agent may be used for surface activity when mixing the wood flour-based powder mixture, the zeolite mixture, and polyolefin, and the lubricant preferably satisfies the fluidity of the molding during molding of the wood flour-based powder mixture, the zeolite mixture, and the polyolefin mixture. It can be used to construct.

Specifically, the compatibilizer is a material that provides compatibility by removing releasability between the wood flour-based powder mixture, the zeolite mixture, and polyolefin, glycidyl methacrylate, ethylene vinyl alcohol, polyvinyl alcohol, and ethylene It may be characterized in that it is any one or two or more mixtures selected from the group consisting of vinyl acetate.

The lubricant is a component added to strengthen the bonding or affinity between the wood powder-based powder mixture, the zeolite mixture, and polyolefin, and to prevent thermal decomposition by reducing frictional heat generated during compounding and extrusion, while simultaneously performing a smooth extrusion operation. , Natural material may be characterized in that the mixture of any one or two or more selected from the group consisting of stearic acid salt, palmitate and laurate.

Finally, the wood-based powder-zeolite mixture is extruded at a pressure of 3 to 6 kgf / cm² at 200 to 300 ° C., and dry-cooled to make pellets.

Hereinafter, examples and experimental examples will be described in detail to specifically describe the present invention. However, the embodiments according to the present invention can be modified in many different forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. The embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art.

< Example  1> Phytoncide, zeolite and Nano Clay  Preparation of contained polymer

Cypress wood containing phytoncide was ground to prepare 1 kg of cypress powder of 300 mesh size. After going through the drying process of the cypress powder, 100 g of polyethylene was prepared and mixed to prepare a powder mixture of wood flour.

A zeolite mixture was prepared by mixing 100 g of zeolite from JUNMEI MATERIALS and 100 g of nanoclay from BYK CLOISITE 15.

1.1 kg of the wood flour-based powder mixture and 200 g of the zeolite mixture, 2 kg of polyethylene from OO products of OOO, 20 g of glycidyl methacrylate as a compatibilizer, and 20 g of calcium stearate as a lubricant were mixed to obtain a wood flour-based zeolite mixture at 85 ° C. Mixed.

The wood powder-zeolite mixture was extruded at 250 ° C. at a pressure of 5 kgf / cm² and dried to cool to prepare pellets.

< Comparative example  1> Phytoncide, zeolite and Nano Clay  Preparation of contained polymer

Cypress wood containing phytoncide was ground to prepare 1 kg of cypress powder of 300 mesh size.

1 kg of the cypress mixture, 100 g of zeolite from JUNMEI MATERIALS, 100 g of nanoclay from BYK CLOISITE 15, 2 kg of polyethylene, 20 g of glycidyl methacrylate as a compatibilizer, and 20 g of calcium stearate as a lubricant are mixed wood powder at 85 ° C -The zeolite mixture was mixed.

The wood powder-zeolite mixture was extruded at a pressure of 5 kgf / cm² at 250 ° C. and cooled dry to prepare pellets.

< Experimental Example  1> moisture permeability test

The results of testing the conditions for the moisture permeability of the polyethylene film prepared using the pellets prepared in Example 1 and Comparative Example 1 are shown in Table 1 below.

-ASTM F 1249-13

-Tester: PERMATRAN 」W, Mode l 3/61 (MOCON, USA)

-Test area: 10 cm ²

division Test result Example 1 6.0 g / (m ² 24h), (38 ± 2) ℃ 100% RH Comparative Example 1 6.7 g / (m ² 24h), (38 ± 2) ℃ 100% RH

< Experimental Example  2> Oxygen permeability test

The results of testing the conditions under the moisture permeability for the polyethylene film prepared using the pellets prepared in Example 1 and Comparative Example 1 are shown in Table 2 below.

-ASTM F 1927-14

-Tester: ILLINOIS 8003 (SYSTECH, USA)

-Test area: 10 cm ²

division Test result Example 1 3000 cm ³ / (m ² 24h), (23 ± 2) ℃ Comparative Example 1 2800 cm ³ / (m ² 24h), (23 ± 2) ℃

Claims (5)

Preparing a wood flour powder mixture by mixing phytoncide-containing wood flour powder and polyolefin;
Preparing a zeolite mixture by mixing zeolite and nanoclay;
Mixing the wood flour-based powder mixture, the zeolite mixture, a polyolefin, a compatibilizer, and a lubricant at 80 to 90 ° C., and mixing the wood flour-based zeolite mixture; And
Extruding the wood powder-zeolite mixture at a pressure of 3 to 6 kgf / cm² at 200 to 300 ° C. and dry-cooling to make pellets. Preparing a zeolite mixture by mixing zeolite and nanoclay;
Preparing a wood flour powder mixture by mixing phytoncide-containing wood flour powder and polyolefin;
Mixing the wood flour-based powder mixture, the zeolite mixture, a polyolefin, a compatibilizer, and a lubricant at 80 to 90 ° C., and mixing the wood flour-based zeolite mixture; And
Extruding the wood powder-zeolite mixture at a pressure of 3 to 6 kgf / cm² at 200 to 300 ° C. and dry-cooling to make pellets. The method according to claim 1 or 2,
The compatibilizer is a method for preparing a polymer for fresh containers and packaging materials, characterized in that it is a mixture of any one or two or more selected from the group consisting of glycidyl methacrylate, ethylene vinyl alcohol, polyvinyl alcohol, and ethylene vinyl acetate. The method according to claim 1 or 2,
The lubricant is a method for preparing a polymer for fresh containers and packaging materials, characterized in that it is a mixture of any one or two or more selected from the group consisting of stearate, palmitate and laurate. The method according to claim 1 or 2,
The phytoncide-containing wood-based powder is pine, fir, gypsum, cedar, cypress and cypress, one or two or more kinds of fresh containers and packaging method of the polymer manufacturing method.

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