KR20210061516A - Manufacturing of eco-friendly plastic containers using seaweeds and vegetable raw materials - Google Patents

Abstract

The present invention relates to the manufacture of an eco-friendly plastic container using seaweed and vegetable raw materials, wherein the container contains seaweed, cassava, plastic materials and minerals, uses 100% of eco-friendly raw materials compared to conventional plastic products to have a certain mechanical strength, and has an eco-friendly effect by being biodegradable in a natural state.

Description

Manufacturing of eco-friendly plastic containers using seaweeds and vegetable raw materials}

The present invention relates to the manufacture of an eco-friendly plastic container using seaweed and vegetable raw materials.

Polyethylene terephthalate (PET) resin is widely used as a material for packaging materials, molded products, films, etc., and it is suitable for beverage containers because it has advantages of high transparency and excellent crystallization rate when a container is manufactured using such PET resin.

PET containers are manufactured in various shapes and sizes due to their low price, excellent moldability of materials, strong impact, and light weight, replacing a large portion of beverage containers for soft drinks and alcoholic beverages previously occupied by glass bottles. It is a situation that I am doing.

However, in the case of a container made of PET, which is an existing petroleum-based plastic, not only a high operating cost is consumed due to a high melting point, but also there is a problem of causing environmental problems due to poor degradability.

In addition, plastic materials such as PET are conveniently used and discarded in large quantities by incineration or landfilling of various waste vinyls, styrofoam, plastic containers, food packaging materials, etc., leakage of environmental hormones, detection of toxic dioxins, and incomplete combustion of waste. It leads to serious environmental pollution such as air pollution.

Therefore, there is a need for research on manufacturing an environmentally friendly plastic container having a certain mechanical strength and biodegradability.

1. Korean Patent Application Publication No. 10-2010-0034502 (published on April 1, 2010)

It is an object of the present invention to provide a composition for an environmentally friendly plastic product having a certain mechanical strength and biodegradability by using only eco-friendly raw materials of seaweed and cassava, and a method for manufacturing a friendly plastic product using seaweed and vegetable raw materials. have.

In order to achieve the above object, the present invention provides a composition for an eco-friendly plastic product using seaweed, cassava, seaweed and vegetable raw materials including plastic and inorganic materials.

In addition, the present invention is a first step of preparing seaweed and cassava extract; A second step of mixing and dissolving a plastic material and an inorganic material in the extract, and then extruding and supplying a sheet-shaped compression-molded surface to a die; In another extruder, a third step of mixing and dissolving a plastic material, an inorganic material, and the seaweed and cassava extract, and then extruding it in an extruder and supplying the inner surface compressed into a sheet shape to a die; A fourth step of laminating the surface and the inner surface extruded through the die to form an integral double sheet layer; And a fifth step of forming the formed double sheet layer into a container shape. It provides a method of manufacturing an eco-friendly plastic product using seaweed and vegetable raw materials comprising a.

Disposable plastic products manufactured using green seaweed and cassava, which are seaweeds according to the present invention, have a certain mechanical strength by using 100% eco-friendly raw materials than conventional plastic products, and have an eco-friendly effect by being biodegraded in a natural state.

1 is a view showing a method of manufacturing an eco-friendly plastic container using seaweed and cassava according to the present invention.

Hereinafter, the present invention will be described in detail.

The present inventors have found that disposable plastic products manufactured using seaweed greens and cassava have a certain mechanical strength by using 100% eco-friendly raw materials than conventional plastic products, and have an eco-friendly effect by being biodegraded in nature. The invention was completed.

The present invention provides a composition for an eco-friendly plastic product using seaweed, cassava, seaweed and vegetable raw materials including plastic materials and inorganic materials.

Preferably, the seaweed and cassava may be extracts, but are not limited thereto.

In addition, it may contain 10-20% by weight of seaweed and cassava, 30-50% by weight of plastic material, and 30-50% by weight of inorganic matter.

At this time, out of the above conditions, the plastic product having excellent mechanical strength and biodegradability according to the present invention may not be properly formed.

The seaweed is characterized in that it is one or more seaweeds selected from the group consisting of green seaweed, laver, tot, kelp, seaweed, kushiraegi, gambling, and large seaweed, and may preferably be greenery, but is not limited thereto.

In addition, the plastic material may be one or more materials selected from the group consisting of polypropylene, polyethylene, and polystyrene, and the inorganic material may be selected from the group consisting of silicon dioxide, calcium carbonate, and talc.

In addition, the composition for eco-friendly plastic products using seaweed and cassava may further include at least one selected from the group consisting of plasticizers, antioxidants, hardeners, heat stabilizers, and catalysts depending on the use, in addition to seaweed, cassava, plastic materials and inorganic materials. have.

In addition, the present invention is a first step of preparing seaweed and cassava extract; A second step of mixing and dissolving a plastic material and an inorganic material in the extract, and then extruding and compressing the surface to form a sheet to a die; In another extruder, a third step of mixing and dissolving a plastic material, an inorganic material, and the seaweed and cassava extract, and then extruding it in an extruder and supplying the inner surface compressed into a sheet shape to a die; A fourth step of laminating the surface and the inner surface extruded through the die to form an integral double sheet layer; And a fifth step of forming the formed double sheet layer into a container shape. It provides a method of manufacturing an eco-friendly plastic product using seaweed and vegetable raw materials comprising a.

The fifth step of molding into the container shape is to fix the phenomenon of the molded product by heating and softening the plastic sheet, placing it on the mold, immediately making the gap between the mold and the sheet vacuum, and simultaneously cooling the sheet to the surface of the mold. On the contrary, air is sucked in to take out the molded product and a finished container can be obtained. In addition, the molding of the container is a conventional technique, and a finished container may be obtained by thermocompression molding by pressing a sheet of a predetermined size on a mold having a certain processing frame against the mold.

In addition, in the second step, 30-50% by weight of a plastic material and 30-50% by weight of an inorganic material are mixed and dissolved at 170-200°C, and then extruded at 190-220°C in an extruder to form a sheet-shaped compression-molded surface. It is characterized by supplying to.

In addition, in the third step, 30-50% by weight of a plastic material, 30-50% by weight of inorganic matter, and 10-20% by weight of the seaweed powder are mixed and dissolved at 150 to 170°C, and then extruded at 170 to 190°C in an extruder. Thus, it characterized in that the inner surface compression-molded into a sheet is supplied to the die.

Hereinafter, the present invention will be described in more detail through examples. These examples are only for describing the present invention in more detail, and that the scope of the present invention is not limited by these examples according to the gist of the present invention, to those of ordinary skill in the art to which the present invention pertains. It will be self-evident.

<Example 1>

The green and cassava were washed with water to remove foreign substances, and then dried. The dried product was pulverized to an appropriate size, and 10 g was put into an extraction container, and then 500 mL of ethanol (95%) was added, followed by cooling extraction under reflux, and filtration to obtain an extract. The extraction process was repeated three times, and then the solvent was concentrated under reduced pressure and dried to obtain 10 g of an ethanol extract.

50 g of polypropylene and 40 g of silicon dioxide, which are plastic materials, were mixed and dissolved at 160° C., and then extruded at 180° C. in an extruder to prepare a sheet-shaped inner surface.

In addition, 10 g of the green lava and cassava extract, 50 g of polypropylene, and 50 g of silicon dioxide were mixed in another extruder and dissolved at 190° C., and then extruded at 210° C. in an extruder to prepare a sheet-like surface.

The surface and inner sheets prepared above are laminated through a die at 180°C to form an integral double sheet layer, and the double sheet layer is heated and softened at 150°C, then placed on the mold, and immediately molded. A biodegradable plastic container was manufactured by cooling the sheet in close contact with the surface of the mold by making the gap between the sheet and the sheet in a vacuum.

The obtained plastic container was checked for mechanical properties such as tensile strength, Young's modulus, and elongation using a universal testing machine, and the results are shown in Table 1.

<Comparative Example 1>

In Example 1, a general plastic container was prepared from polyethylene terephthalate (PET), which is a compatible plastic container, without mixing green rape and cassava extract. The obtained plastic container was checked for mechanical properties such as tensile strength, Young's modulus, and elongation using a universal testing machine, and the results are shown in Table 1.

<Experimental Example 1>

In the above example, the tensile strength was measured using a universal testing machine as a test method of KS M 3509 at a tensile speed of 500 mm/min at a temperature of 23°C and a relative humidity of 50%, and the Young's modulus was determined according to ASTM D-790. Thus, the elongation was measured by the method of KS M ISO1798.

As can be seen in Table 1 below, Example 1, which is a biodegradable plastic container prepared by adding seaweed (green) and cassava extract, uses 100% eco-friendly raw materials, without adding seaweed (green) and cassava extract, PET Mechanical properties (tensile strength, tear strength, elongation) are somewhat lower than that of the general plastic container of Comparative Example 1 manufactured by using, but exhibited constant mechanical strength because it is used as a plastic container.

division Tensile strength (MPa) Young's modulus (MPa) Elongation (%) Example 1 25 35 2 Comparative Example 1 55 66 5

<Experimental Example 2>

In order to test the biodegradability of the samples prepared in Example 1 and Comparative Example 1, a plastic container was tested by a method of reducing the weight of the sample through soil reclamation for 1 month. The biodegradation rate was measured by collecting samples based on a predetermined period after embedding, removing foreign substances from the sample with water and alcohol, and dividing the weight after embedding by the weight before embedding.

At this time, the reclamation was carried out to a depth of 30 cm in which aerobic and anaerobic microorganisms can coexist in nearby hills.

division Biodegradability (% weight reduction) Example 1 100 Comparative Example 1 20~30

As can be seen from Table 2, in the case of the biodegradable plastic container containing seaweed (green) and cassava extract, it was found that the plastic container was completely decomposed compared to the general plastic container of Comparative Example 1 after 1 month.

Claims (11)

Composition for eco-friendly plastic products using seaweed and vegetable raw materials, including seaweed, cassava, plastic materials and inorganic materials. The method of claim 1,
A composition for eco-friendly plastic products using seaweed and vegetable raw materials, containing 10-20% by weight of seaweed and cassava, 30-50% by weight of plastic materials, and 30-50% by weight of inorganic materials. The method of claim 1,
The seaweed is a composition for an eco-friendly plastic product using seaweed and vegetable raw materials, characterized in that it is one or more seaweeds selected from the group consisting of green seaweed, laver, tot, kelp, seaweed, kushiraegi, gambling, and large seaweed. The method of claim 1,
The plastic material is one or more materials selected from the group consisting of polypropylene, polyethylene and polystyrene, characterized in that, the composition for eco-friendly plastic products using seaweed and vegetable raw materials. The method of claim 1,
The inorganic material is an eco-friendly plastic product composition using seaweed and vegetable raw materials, characterized in that at least one inorganic material selected from the group consisting of silicon dioxide, calcium carbonate and talc. The first step of preparing seaweed and cassava extract;
A second step of mixing and dissolving a plastic material and an inorganic material in the extract, and then extruding and compressing the surface to form a sheet to a die;
In another extruder, a third step of mixing and dissolving a plastic material, an inorganic material, and the seaweed and cassava extract, and then extruding it in an extruder and supplying the inner surface compressed into a sheet shape to a die;
A fourth step of laminating the surface and the inner surface extruded through the die to form an integral double sheet layer; And
A fifth step of forming the molded double sheet layer into a container shape; A method of manufacturing an eco-friendly plastic product using seaweed and vegetable raw materials, characterized in that it comprises a. The method of claim 6,
The plastic material is characterized in that at least one material selected from the group consisting of polypropylene, polyethylene and polystyrene, the method of manufacturing an eco-friendly plastic product using seaweed and vegetable raw materials. The method of claim 6,
The inorganic material is one or more inorganic materials selected from the group consisting of silicon dioxide, calcium carbonate, and talc. The method of claim 6,
The seaweed is a method of manufacturing an eco-friendly plastic product using seaweed and vegetable raw materials, characterized in that it is at least one seaweed selected from the group consisting of green seaweed, laver, tot, kelp, seaweed, scallop, gambling, and large seaweed. The method of claim 6,
In the second step, 30-50% by weight of a plastic material and 30-50% by weight of an inorganic material are mixed, dissolved at 170-200°C, and then extruded at 190-220°C in an extruder, and the surface formed by compression molding in a sheet shape is supplied to the die. A method of manufacturing an eco-friendly plastic product using seaweed and vegetable raw materials. The method of claim 6,
In the third step, 30-50% by weight of plastic material, 30-50% by weight of inorganic matter, and 10-20% by weight of the seaweed and cassava extract are mixed and dissolved at 150-170°C, and then extruded at 170-190°C in an extruder. A method of manufacturing an eco-friendly plastic product using seaweed and vegetable raw materials, characterized in that the inner surface of the sheet is compressed and molded into a die.

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