KR101749257B1 - Method for manufacturing of seedling box using waste plastic and waste paper - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a seedling box using waste plastics and waste paper, and more particularly, The present invention relates to a method of manufacturing a seedling box using waste plastics and waste paper which can minimize deformation due to factors.
The method of manufacturing a seedling box using waste plastics and waste paper according to the present invention comprises the steps of selecting collected waste plastic and waste paper as raw materials and removing impurities remaining in the raw materials; Crushing the raw material from which the impurities have been removed to a size of 3 to 5 cm using a crusher; Milling the pulverized raw material to a size of 1 to 2 mm using a pulverizer; Drying the pulverized waste plastic powder and pulverized paper powder at 40 to 60 ° C for 15 to 30 minutes with hot air; A mixture of 3 to 5% by weight of an epoxy resin, 1 to 5% by weight of an ultraviolet screening agent and 1 to 5% by weight of a binder was mixed with 80 to 85% by weight of hot air-dried waste plastic powder and 5 to 10% by weight of waste paper powder, Stirring; Introducing the stirred mixture into a mold, pressurizing the mixture at a temperature of 150 to 250 DEG C by using hydraulic pressure; And cooling the molded body in a water bath maintained at 10 to 20 ° C for 30 to 60 minutes in order to prevent deformation due to heat shrinkage of the press-molded molding.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a seedling box using waste plastics and waste paper,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a seedling box using waste plastics and waste paper, and more particularly, The present invention relates to a method of manufacturing a seedling box using waste plastics and waste paper which can minimize deformation due to factors.

Generally, wastes such as waste plastics, waste paper, and the like are increasing exponentially every year. Various methods for preventing waste of resources and pollution of the natural environment are being developed by separately collecting and recycling the waste to effectively treat the waste.

Recently, it is recommended to recycle waste plastics for agricultural materials from the environmental aspect.

On the other hand, one of the agricultural materials, which is one of the agricultural materials, puts the soil inside, then seeds the rice seedlings in the upper part of the soil, replaces water on the top of the rice seeds and then supplies water at a proper temperature and temperature. It is a tool used to cultivate rice by using rice paddy to rice field.

An example of such a technique is disclosed in Japanese Patent Application Laid-Open No. 10-0411726.

The unit cell is formed with a plurality of unit cells which are separated from each other on the bottom surface by a plurality of ribs protruding from the bottom surface at regular intervals and at least one hole is formed in the unit cell, And the holes formed in each of the holes are formed with holes of different sizes at regular intervals.

However, according to the conventional art constructed as described above, since it is made of a plastic material, it is easily deformed by the influence of temperature, moisture, sunlight and the like, and the dropping of the bottom plate is caused by the load of the nutrient filler filled with the ground, There is a problem that it is difficult to maintain. In addition, there has been a problem in that cost and environmental pollution are generated when a seedling that is difficult to be reused due to deformation or the like is collected and discarded.

KR 10-0411726 B1 (December 05, 2003)

The object of the present invention is to solve the above-mentioned problems, and it is an object of the present invention to provide a waste plastics and waste paper which are recyclable waste plastics and waste paper and are eco-friendly and blended with additives including waste paper to improve heat resistance and durability And to provide a method for manufacturing a seedling box using the same.

It is another object of the present invention to provide a method of manufacturing a seedling box using waste plastics and pulverized paper, which can greatly reduce the cost of producing seedlings due to recycling of waste plastics and waste paper, and can move the seedlings box easily due to its light weight.

In order to accomplish the above object, a method of manufacturing a seedling box using waste plastics and waste paper according to the present invention comprises the steps of: collecting collected waste plastics and waste paper to prepare a raw material and removing impurities remaining in the raw material; Crushing the raw material from which the impurities have been removed to a size of 3 to 5 cm using a crusher; Milling the pulverized raw material to a size of 1 to 2 mm using a pulverizer; Drying the pulverized waste plastic powder and pulverized paper powder at 40 to 60 ° C for 15 to 30 minutes with hot air; A mixture of 3 to 5% by weight of an epoxy resin, 1 to 5% by weight of an ultraviolet screening agent and 1 to 5% by weight of a binder was mixed with 80 to 85% by weight of hot air-dried waste plastic powder and 5 to 10% by weight of waste paper powder, Stirring; Introducing the stirred mixture into a mold, pressurizing the mixture at a temperature of 150 to 250 DEG C by using hydraulic pressure; And cooling the molded body in a water bath maintained at 10 to 20 ° C for 30 to 60 minutes in order to prevent deformation due to heat shrinkage of the press-molded molding.

Further, the method further comprises a step of vacuum-compressing the press-molded product in a state where the molded product is put in a vacuum compressor, and compressing the compressed product so that voids are not generated when the mixture is bonded by decompression through a vacuum compressor.

The waste plastic may be any one of high density polyethylene, low density polyethylene, polypropylene, and polyethylene.

Further, the ultraviolet screening agent is characterized by being any one of titanium oxide, octocrylene, butylmethoxydibenzoylmethane, benzotriazole and synoxate.

Further, the binder is characterized by being one of aluminum oxide and silica.

As described above, the method of manufacturing a seedling box using waste plastics and waste paper according to the present invention is environment-friendly because waste plastics and waste paper can be recycled, and waste plastics are mixed with additives including waste paper to improve heat resistance and durability, It has an effect of preventing development or deformation.

In addition, resource recycling significantly reduces the manufacturing cost of the nursery mothers, greatly reducing the burden on the farmhouse, and facilitating the movement of the nursery mothers.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process diagram showing a method of manufacturing a seedling box using waste plastics and waste paper according to the present invention. FIG.
2 is a perspective view showing a seedling using a waste plastic and waste paper according to the present invention.
3 is a plan view showing a seedling using waste plastics and waste paper according to the present invention.
FIG. 4 is a sectional view showing a seedling using waste plastics and waste paper according to the present invention. FIG.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a process diagram showing a method of manufacturing a seedling box using waste plastics and waste paper according to the present invention.

As shown in FIG. 1, the method of manufacturing a seedling box using waste plastics and waste paper according to the present invention includes a step of sorting raw materials and removing impurities (S100), a raw material crushing step (S200), a raw material crushing step (S300) (S400), a mixture stirring step (S500), a press molding step (S600), and a molding cooling step (S700).

First, in the step of sorting the raw materials and removing impurities (S100), collected waste plastic and waste paper are sorted into raw materials and impurities remaining in the raw materials are removed.

In the step of selecting the raw materials and removing the impurities (S100), waste plastics and waste paper which are used and discarded are collected and those usable as raw materials are selected.

Although waste plastics differ in kind and content depending on the place and time of occurrence, most of waste plastics that are incinerated or buried contain more than 30% of soil, glass, metal and nonmetal.

Here, the waste plastic is preferably any one of high density polyethylene, low density polyethylene, polypropylene and polyethylene. In particular, when the waste plastic is used as a raw material, the above materials may be used singly or in a mixture of one or more.

Examples of the high-density polyethylene include water bottles, detergent bottles, edible bottles, milk containers, juice containers, yogurt and margarine containers, cereal containers, and trash containers.

Examples of the low-density polyethylene material include plastic, film can, and the like.

Examples of the polypropylene material include general plastic containers, lock & lock containers, and drinking water boxes.

Examples of the polyethylene material include a ketchup container, a salad dressing container, and the like.

There are other materials such as polyvinyl chloride (gas hose, pvc), polystyrene (styrofoam container, egg transparent container, toy), polycarbonate (spoon, water bottle, etc.) It is preferable to exclude it.

On the other hand, the discarded paper may be a newspaper, a magazine, a leftover wrapping paper, a printed paper, a writing paper, a textbook, etc. discarded at home or office, and the discarded paper used in the present invention is not particularly limited to the above.

In the process of selecting the waste plastics and waste paper, the non-impurities are first selected, and the impurities are washed and dried to remove impurities.

In order to use the waste plastic as a raw material, the waste plastic is sorted and separated according to the exact material, and the foreign substance must be removed through a cleaning operation.

Particularly, in order to increase the cleaning efficiency in the process of washing the waste plastic, when the cleaning agent is added, a detergent which is harmless to the human body and not harmful to the use should be used.

The step of washing foreign matters from the waste plastics is an important step that determines the state of the final raw material, and is generally performed by spraying water or flowing the raw material in the water tank.

In the present invention, there is a dry cleaning method in which impurities are removed by rubbing at a high speed, but a wet cleaning method is applied because oil or beverage residue is not completely removed.

Meanwhile, before crushing and finely pulverizing the waste plastic washed through the raw material sorting and impurity removing step (S100), a refrigerator using a hydrogen alloy which uses ground water as a cooling heat source and waste heat generated from various apparatuses of the factory as a heat source And cooling the waste plastics through the heat exchanger.

The refrigerator utilizes the principle of absorbing the surrounding heat during the processing of the hydrogen-containing alloy. The characteristics of the hydrogen alloy, the use of the factory waste heat and the ground water save power consumption compared to the conventional refrigerator, It is eco-friendly because it does not use freon gas as it uses energy.

The waste heat is generated by the waste heat generated from various devices of the plant, and the ground waste is used as the cooling heat source. The waste plastic is cooled at a low temperature and then pulverized to produce waste plastic powder And the production cost and the maintenance cost can be minimized.

In the raw material crushing step (S200), the raw materials from which the impurities have been removed are each crushed to a size of 3 to 5 cm using a crusher.

That is, the waste plastics and the waste paper, which have been sorted or removed from the impurities, are sorted into the crusher (not shown) through the separation of the raw materials and the step of removing impurities (S100) and crushed to a size of 3 to 5 cm, And crushed to a size of 4 cm.

In the raw material pulverization step (S300), the pulverized raw material is pulverized to a size of 1 to 2 mm using a pulverizer.

That is, each of the waste plastics and waste paper, which have been crushed to a predetermined size through the raw material crushing step (S200), are put into respective crushers (not shown) and finely crushed to a size of 1 to 2 mm.

Meanwhile, an operation of separating foreign matter such as metal remaining in the pulverized waste powder and pulverized paper powder through the raw material pulverization step (S300) is performed.

An electromagnet may be installed on an upper portion of the belt conveyor to which the waste plastic powder and the waste paper powder are fed and supplied so that the metal can be attached and recovered with a strong magnetic force. This magnetic force selection step can be repeatedly performed until the metal is separated and recovered.

By separating and recovering the metal contained in the waste plastics powder and the waste paper powder through the magnetic force selecting step, it is possible to prevent the physical property change of the raw material or the occurrence of defects in the molding step.

In the hot air drying step (S400), the fine pulverized waste plastic powder and pulverized paper powder are subjected to hot air drying at a temperature of 40 to 60 DEG C for 15 to 30 minutes.

The pulverized waste plastic powder and pulverized paper powder must be free of moisture in order to be used without any problem in the molding process and affect the heat temperature when moisture is present and hinder melting, which has a fatal effect on the molding.

Therefore, the waste plastic powder and the pulverized paper powder formed in powder form through the raw material pulverization step (S300) are put into a hot-air dryer (not shown), followed by hot air drying at a temperature of 40 to 60 DEG C for 15 to 30 minutes, And the moisture contained in the pulverized powder is removed.

In the mixture stirring step S500, 3 to 5% by weight of an epoxy resin, 1 to 5% by weight of an ultraviolet screening agent, 1 to 5% by weight of a binder %, And the mixture is stirred using a stirrer.

That is, the epoxy resin, the ultraviolet screening agent, and the binder are mixed with the waste plastic powder and the waste paper powder through which the moisture is removed through the hot air drying step (S400), and then the mixture is added to a separate stirrer (not shown)

If the content of the waste plastic powder is less than 80% by weight, heat resistance and durability are deteriorated. If the amount of the waste plastic powder is more than 85% by weight, bonding properties with other raw materials are deteriorated.

If the content of the waste paper powder is less than 5% by weight, the strength characteristics of the molded article are deteriorated. If the amount of the waste paper powder is more than 10% by weight, there is a possibility of deformation due to deformation due to difference in shrinkability.

The epoxy resin is added for the purpose of improving the adhesive force, and hardly shrinks upon curing and is excellent in the filling property of the pores.

When the content of the epoxy resin is less than 3% by weight, the adhesiveness is deteriorated. When the content is more than 5% by weight, the effect of recycling is decreased and the mechanical properties are deteriorated.

The ultraviolet screening agent is added to prevent the seedling from being deteriorated by ultraviolet rays, and is preferably composed of a polymer having an azo group and a benzene group.

The ultraviolet screening agent is preferably composed of any one of titanium oxide, octocrylene, butylmethoxydibenzoylmethane, benzotriazole and synoxate.

If the content of the ultraviolet screening agent is less than 1 wt%, the ultraviolet ray blocking effect hardly occurs. If the content of the ultraviolet screening agent is more than 5 wt%, the mechanical properties are deteriorated and the manufacturing cost is increased.

The binder is for improving durability and is preferably made of any one of aluminum oxide and silica.

If the content of the binder is less than 1% by weight, the binding force between the waste plastic powder and the waste paper powder decreases. If the content of the binder exceeds 5% by weight, only the cost of the raw material is added but the effect of improved durability is not obtained.

In order to improve the physical properties of the waste plastics and the waste paper, the above-mentioned composition was used in the manufacturing process. No harmful substances such as organotin compounds, lead compounds and cadmium compounds were added.

On the other hand, in the press molding step (S600), the agitated mixture is put into a molding die, and the mixture is pressurized by using hydraulic pressure at a temperature of 150 to 250 ° C.

That is, the mixture is agitated through the mixing agitation step (S500) and the mixture is put on a mold for casting box for seedling box molding on a hydraulic press and heated under pressure at a temperature of 150 to 250 ° C.

In step S700, the molded product is cooled in a water bath maintained at 10 to 20 ° C for 30 to 60 minutes in order to prevent deformation due to heat shrinkage of the molded product.

At this time, when the molded product is put in a water tank, it is cooled in a state fixed to a mold of a seedling box provided separately in the water tank, thereby preventing the deformed shape of the food animal by heat shrinkage.

Meanwhile, in the method of producing a seedling box using waste plastic and waste paper according to the present invention, the press-molded product is vacuum-compressed in a state of being put in a vacuum compressor (not shown) So as not to cause a problem.

The vacuum pressure reduction system is such that the press-molded workpiece is put into a vacuum compressor before being cooled, vacuum-pressed, and pressed and bonded to the mixture by reduced pressure.

When such a vacuum depressurization method is performed so as to prevent pores from occurring during bonding between the mixtures, not only the hardness and strength of the food seedling are improved but also the epoxy resin stably penetrates into the mixture.

Hereinafter, the present invention will be described in detail with reference to examples. However, the following examples are illustrative of the present invention, and the present invention is not limited to the following examples.

[Example 1]

The collected waste plastic and waste paper were sorted, pulverized and dried by hot air drying to produce waste plastics powder and waste paper powder.

3% by weight of an epoxy resin, 4% by weight of an ultraviolet screening agent and 3% by weight of a binder were added to 80% by weight of the produced waste plastic powder and 10% by weight of waste paper powder, and stirred to prepare a mixture.

The mixture was introduced into a molding die and subjected to pressure molding through a hydraulic press to produce a molding.

The molded product was cooled in a water bath for 50 minutes to prepare a seedling box (Figs. 2 to 4).

[Example 2]

The collected waste plastic and waste paper were sorted, pulverized and dried by hot air drying to produce waste plastics powder and waste paper powder.

5% by weight of an epoxy resin, 3% by weight of an ultraviolet ray blocking agent and 2% by weight of a binder were added to 80% by weight of the produced waste plastic powder and 10% by weight of waste paper powder, and the mixture was stirred to prepare a mixture.

The mixture was introduced into a molding die and subjected to pressure molding through a hydraulic press to produce a molding.

The molded product was cooled in a water bath for 50 minutes to prepare a nursery.

[Comparative Example 1]

A nursery of polypropylene manufactured and sold by Nasan Plastics Co., Ltd. was purchased and prepared.

The following experimental examples show experimental results comparing the characteristics of the embodiment of the present invention with the characteristics of the first comparative example in order to more easily grasp the characteristics of the first and second embodiments of the present invention.

[Experimental Example 1] Drop test

In order to compare the physical characteristics of the seedling box prepared in Example 1 and the seedling box prepared in Comparative Example 1 with the seedling box prepared in Example 1 and Comparative Example 1 according to the above-described Example 1 and Example 2 The dropping test by the KS G 3211 was performed on the prepared seedlings, and the results are shown in Table 1 below.

division Example 1 Example 2 Comparative Example 1 Cracks and cracks occur none none none

As shown in Table 1 above, the seedling box prepared according to Examples 1 and 2 and the seedling prepared according to Comparative Example 1 did not crack or break due to the drop test.

[Experimental Example 2]

The seedling box prepared according to the above-described Example 1 and Example 2 and the seedlings prepared according to Comparative Example 1 were turned upside down on a flat soil bottom, and 200 g of steel balls were weighed at a height of 40 cm, And the cracks and cracks were observed after the free fall in the center portion twice. The results are shown in Table 2 below.

division Example 1 Example 2 Comparative Example 1 Cracks and cracks occur none none none

As shown in Table 2 above, the seedling box prepared according to Examples 1 and 2 and the seedling prepared according to Comparative Example 1 did not crack or break due to the fall impact test.

[Experimental Example 3] Heat resistance test

The seedling box prepared according to Example 1 and Example 2 described above and the seedling prepared by Comparative Example 1 were kept at a temperature of about 60 ° C for one hour and taken out and left to stand for 30 minutes in a state filled with the soil, And the results are shown in Table 3 below.

division Example 1 Example 2 Comparative Example 1 Whether or none none Slight deflection at the center of the floor

As shown in Table 3, the nursery dogs prepared according to Examples 1 and 2 were not deformed by the heat resistance test, but the nursery bed prepared according to Comparative Example 1 showed a slight sagging at the center of the bottom I could.

[Experimental Example 4] Low temperature drop test

The seedling box prepared according to Examples 1 and 2 described above and the seedling prepared according to Comparative Example 1 were left at -20 ° C for 1 hour and taken out immediately and dropped freely from the 1.5 m height to a flat concrete floor repeatedly and horizontally And cracks and cracks were visually confirmed. The results are shown in Table 4 below.

division Example 1 Example 2 Comparative Example 1 Cracks and cracks occur none none none

As shown in Table 4 above, the seedling box prepared according to Examples 1 and 2 and the seedling prepared according to Comparative Example 1 did not crack or break due to the low temperature drop test.

[Experimental Example 5]

In order to compare the specific gravity of the seedling box prepared according to the above-described Example 1 and Example 2 and the seedling box prepared in Comparative Example 1, the seedling box prepared according to the above-described Example 1 and Example 2 and Comparative Example 1 Were tested by KS M 3016 (plastic density and specific gravity test method), and the results are shown in Table 5 below.

division Example 1 Example 2 Comparative Example 1 Specific gravity (g / cm3) 0.98 0.97 0.96

As shown in Table 5 above, the weight of the nursery produced according to Examples 1 and 2 was slightly higher than that of the nursery boxes prepared by Comparative Example 1, but it was 0.90 g / cm 3 or more, which is the quality regulation range.

As a result, compared with the seedling box prepared according to Comparative Example 1, the seedling produced according to Example 1 and Example 2 had no significant difference in terms of strength from the viewpoint that cracking and cracking did not occur, but temperature and load It was found that the rate of occurrence of deflection was superior to that of the seedling box prepared in Comparative Example 1.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art without departing from the scope of the present invention. The scope of the invention should therefore be construed in light of the claims set forth to cover many of such variations.

Claims (5)

Collecting the collected waste plastics and waste paper to prepare a raw material, and removing impurities remaining in the raw material;
Crushing the raw material from which the impurities have been removed to a size of 3 to 5 cm using a crusher;
Milling the pulverized raw material to a size of 1 to 2 mm using a pulverizer;
Drying the pulverized waste plastic powder and pulverized paper powder at 40 to 60 ° C for 15 to 30 minutes with hot air;
A mixture of 3 to 5% by weight of an epoxy resin, 1 to 5% by weight of an ultraviolet screening agent and 1 to 5% by weight of a binder was mixed with 80 to 85% by weight of hot air-dried waste plastic powder and 5 to 10% by weight of waste paper powder, Stirring;
Introducing the stirred mixture into a mold, pressurizing the mixture at a temperature of 150 to 250 DEG C by using hydraulic pressure; And
Cooling the molded body in a water bath maintained at 10 to 20 ° C for 30 to 60 minutes to prevent deformation due to heat shrinkage of the press-molded body;
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Further comprising a step of vacuum-compressing the press-molded workpiece in a state where it is put in a vacuum compressor, and compressing the press-molded product so as not to generate a gap when the mixture is bonded by decompression through a vacuum compressor,
Before crushing and pulverizing the waste plastic washed through the raw material sorting and the impurity removing step, the waste plastic is supplied through the refrigerator using the hydrogen alloy, which uses the ground water as the cooling heat source and the waste heat generated from the various devices of the plant as the heat source, Further comprising a step of cooling,
When the molded product is put into a water tank in the mold cooling step, it is cooled in a state in which it is fixed to a mold of a seedling box type provided in a water tank,
The waste plastic,
High-density polyethylene, low-density polyethylene, polypropylene, and polyethylene,
The UV-
Titanium oxide, octocrylene, butylmethoxydibenzoylmethane, benzotriazole, and synoxate,
Wherein the binder comprises:
Aluminum oxide, and silica. ≪ RTI ID = 0.0 > 8. < / RTI > delete delete delete delete

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