KR20240015779A - Recycled material processed products using plastic waste as raw materials and manufacturing method therefor - Google Patents

Abstract

The present invention collects and shreds plastic waste, mixes base resin with the shredded waste, adds a hardener, and cures it at a certain curing temperature. Through centrifugation, the waste is evenly dispersed within the base resin, so that it is not discarded. It relates to an upcycling material made from plastic waste as a raw material and a method of manufacturing the same, which not only allows the use of waste, but also improves aesthetics by uniformly dispersing shredded material within the base resin.

Description

Recycled material processed products using plastic waste as raw materials and manufacturing method therefor}

The present invention relates to upcycling materials and their manufacturing methods. More specifically, plastic waste is collected and shredded, a base resin is mixed with the shredded waste, a hardener is added, and cured at a certain curing temperature, and centrifugal processing is performed. Upcycling materials made from plastic waste that allow waste to be uniformly dispersed within the base resin, allowing the use of discarded waste, as well as improving aesthetics by uniformly dispersing shredded material within the base resin. It's about the manufacturing method.

[R&D project that supported this invention]

[ Name of Ministry ] Ministry of Environment

[Research Management Institute] Korea Environmental Industry Association

[Research project name] Upcycling industry development support project

[Research project name] Commercialization of upcycling materials using cosmetic bottle waste as the main raw material

[Host research institute] Tecoplus Co., Ltd.

[Research period] 2022.05.01~2022.11.30

The Korean Cosmetic Association and the Ministry of Environment are discussing the ‘2030 Cosmetics Plastic Initiative’ and are preparing various measures such as the ‘Empty Bottle Collection Campaign’ to achieve 10% collection of empty cosmetic bottles by 2025. A recent characteristic is that the driving force behind this change is being activated primarily by consumers outside the company, not inside the company. In particular, people in their 10s to 30s, who are the main consumers of cosmetics, consider corporate social and environmental responsibility very important and use it as a major criterion for purchasing products and preferring brands. Changes in consumers' perception of companies wanting to be responsible for the environment will become a driving force in the development and commercialization of more and more eco-friendly materials in the future.

Approximately 90% of empty cosmetic bottles collected after use are wastes with oily contents that make it difficult to process them into recycled plastic or are made of composite materials such as metal/glass bonded together. Recently, PE and PP materials in cosmetic containers have been washed to create recycled materials, but issues of environmental pollution arising from the cleaning process and off-flavor issues due to cosmetic residue remain. The cosmetics industry is struggling to find ways to upcycle and reuse empty cosmetic bottle collections, but the need for new upcycled materials is also high as companies are deeply concerned as this is not possible through the general plastic recycling process.

These materials are made primarily from non-renewable plastic waste generated in the cosmetics industry. More than 90% of cosmetic containers are made of composite materials and cannot be recycled due to contamination, so there is a high need for solutions not only in cosmetics companies but also in society. These materials are upcycling materials that can be used in various downstream industries such as cosmetic containers, clothing, fashion, interior design, and household goods through minimal processing by utilizing plastic waste generated in the cosmetics industry.

'OTHER' grade materials containing various materials cannot be re-extruded because the physical and thermal properties of the materials used are different. Therefore, it cannot be recycled and is incinerated/landfilled, or there is no special use plan other than mixing it with less than 5% of building materials such as cement. In addition, since various colors of general plastic recycled resin are mixed during the re-extrusion process, there is a problem in that only black or dull gray colors are possible, resulting in poor aesthetics.

When the most commonly used PP and PET are extruded together, the -CH3 group and -COOH group of PP have different functional groups and the interfacial bonding force is low, so compatibility is very low. If you force it into the form of a pellet and use it, peeling or breaking may occur in the molded product. In addition, the melting points are different for each material, so when working at high temperatures, PP, PE, etc. with low melting points carbonize, while when working at low temperatures, PET, ABS, etc. with high melting points do not melt and are discharged in a lumpy state, which is normal. Pellet production is impossible. In addition, layer separation occurs during the grinding and mixing process due to the different specific gravity of each material, which makes it impossible to form consistent physical properties because the blend ratio of the materials input into the extruder is different each time. In addition, there are problems such as distortion and numerical instability of the produced products due to differences in shrinkage rates. Additionally, when two types of resins are mixed, voids are generated due to differences in shrinkage rate during the solidification process, making normal pellet formation impossible.

Therefore, there is a growing need for a process that can recycle waste plastic without a re-extrusion process, which not only enables carbon reduction and environmental pollution reduction, but also establishes a manufacturing method for products with excellent physical properties and aesthetics. This is necessary.

Republic of Korea Patent Publication No. 10-2021-0096363 (published on 2021.08.05.), “Method for manufacturing waste plastic recycled moldings with excellent hardness and strength”

In order to solve the above problems, the present invention collects and shreds plastic waste, mixes base resin with the shredded waste, adds a hardener, and cures it at a certain curing temperature. However, through centrifugal processing, the waste is not contained in the base resin. The purpose is to provide an upcycling material and manufacturing method made from plastic waste that can utilize discarded waste by uniformly dispersing it, as well as improve aesthetics by uniformly dispersing shredded material in the base resin. There is.

In order to achieve the above object, the present invention includes a waste collection and shredding step (S10) of collecting and shredding plastic waste; In the waste collection and shredding step (S10), base resin is mixed with the shredded waste, a hardener is added and cured at a certain curing temperature, and the waste is dispersed within the base resin through centrifugal processing to produce an upcycling material. Centrifugal separation step (S20); An upcycling material sheet manufacturing step (S30) of cutting the upcycling material produced in the centrifugal separation step (S20) to produce an upcycling material sheet; And, a polishing step (S40) of manufacturing an upcycling material processed product by polishing the upcycling material sheet manufactured in the upcycling material sheet manufacturing step (S30). Manufacture of an upcycling material processed product using plastic waste as a raw material, including a. Provides a method.

In addition, the non-recyclable plastic waste collected and shredded in the waste collection and shredding step (S10) is characterized by having a relatively high melting point compared to the curing temperature of the base resin so as not to melt in the centrifugal processing step (S20). do.

In addition, the base resin in the centrifugal processing step (S20) is an unsaturated polyester resin, and the unsaturated polyester resin is polystyrene, polyvinyl toluene, polyallyl ether, polydiacrylate, polymethyl methacrylate, poly It is characterized in that it is at least one selected from vinyl toluene, polyvinyl acetate, polyethylene glycol diacrylate, and dimethyl phthalate.

In addition, the centrifugal processing step (S20) includes a first base resin application step (S21) of mixing and applying a base resin and a hardener to the centrifugal processing equipment; A mixed resin application step (S22) in which a mixed resin obtained by mixing the shredded waste prepared in the waste collection and crushing step (S10) and the base resin is applied to the base resin applied in the first base resin application step (S21). ; It is characterized by comprising a secondary base resin application step (S23) of applying the base resin to the mixture of the crushed waste and base resin applied in the mixing application step (S22).

In addition, the present invention provides a processed product made of upcycling material using plastic waste as a raw material, which is manufactured through the above manufacturing method.

The upcycling material made from plastic waste according to the manufacturing method of the present invention collects and shreds plastic waste, mixes base resin with the shredded waste, adds a hardener, and cures at a certain curing temperature through centrifugal processing. , It is useful in terms of waste resource utilization as waste is dispersed uniformly within the base resin, making it possible to utilize discarded waste. Of course, the aesthetics are increased by ensuring that the shredded material is uniformly dispersed within the base resin.

Figure 1 is a flow chart showing a manufacturing method of upcycling material processing products using plastic waste as a raw material according to the present invention.
Figure 2 is a flow chart showing a specific manufacturing method of upcycling material processing products using plastic waste as a raw material according to the present invention.
Figure 3 is a photograph showing centrifugal separation processing equipment in the centrifugal separation processing step (S20) of the method of manufacturing upcycling material processed products using plastic waste as a raw material according to an embodiment of the present invention.
Figure 4 is a photograph showing the appearance of the upcycling material manufactured through the centrifugal separation process step (S20) of the method for manufacturing upcycling material processed products using plastic waste as a raw material according to an embodiment of the present invention.
Figure 5 is a photograph showing the appearance of an upcycling material sheet manufactured through the upcycling material sheet manufacturing step (S30) of the method for manufacturing upcycling material processed products using plastic waste as a raw material according to an embodiment of the present invention.
Figure 6 is a photograph showing the appearance of a processed upcycling material product manufactured through the polishing step (S40) of the manufacturing method of an upcycling material processed product using plastic waste as a raw material according to an embodiment of the present invention.

The following detailed description of the present invention is an embodiment in which the present invention can be practiced and refers to the accompanying drawings, which are shown as examples of the corresponding embodiments. These embodiments are described in sufficient detail to enable any person skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different from one another but are not necessarily mutually exclusive. For example, specific shapes, structures and characteristics described herein may be implemented in one embodiment without departing from the spirit and scope of the invention. Additionally, it should be understood that the location or arrangement of individual components within each described embodiment may be changed without departing from the spirit and scope of the invention.

Accordingly, the detailed description set forth below is not intended to be taken in a limiting sense, and the scope of the invention is limited only by the appended claims together with all equivalents to what those claims would assert if properly described. Similar reference numbers in the drawings refer to identical or similar functions across various aspects.

The terms used in the present invention are general terms that are currently widely used as much as possible while considering the function in the present invention, but this may vary depending on the intention or precedent of a person working in the art, the emergence of new technology, etc. In addition, in certain cases, there are terms arbitrarily selected by the applicant, and in this case, the meaning will be described in detail in the description of the relevant invention. Therefore, the terms used in the present invention should be defined based on the meaning of the term and the overall content of the present invention, rather than simply the name of the term.

In the present invention, when a part “includes” a certain component, this means that, unless specifically stated to the contrary, it does not exclude other components but may further include other components.

Hereinafter, the method for manufacturing an upcycling material using plastic waste according to the present invention will be described in detail.

The method of manufacturing an upcycling material processed product using plastic waste as a raw material according to the present invention includes a waste collection and shredding step (S10) of collecting and shredding plastic waste; In the waste collection and shredding step (S10), base resin is mixed with the shredded waste, a hardener is added and cured at a certain curing temperature, and the waste is dispersed within the base resin through centrifugal processing to produce an upcycling material. Centrifugal separation step (S20); An upcycling material sheet manufacturing step (S30) of cutting the upcycling material produced in the centrifugal separation step (S20) to produce an upcycling material sheet; and a polishing step (S40) of manufacturing an upcycling material processed product by polishing the upcycling material sheet manufactured in the upcycling material sheet manufacturing step (S30).

First, the waste collection and shredding step (S10) is performed.

In the waste collection and shredding step (S10), the waste is collected and shredded to produce shredded waste.

Meanwhile, it is appropriate that the plastic waste collected and shredded in the waste collection and shredding step (S10) have a relatively high melting point compared to the curing temperature of the base resin so that it does not melt in the centrifugal processing step (S20). More specifically, it is appropriate that the plastic waste has a melting point higher than 25 to 75°C, which is the curing temperature of the base resin in the centrifugal processing step (S20). This applies to most plastic waste, and specific examples include PE, PP, PET, PETG, PS, PVC, and ABS.

For the plastic waste collected and shredded in the waste collection and shredding step (S10), using non-recyclable materials will be superior in utilizing waste resources. In terms of resource utilization, it is desirable to use plastic waste collected and shredded in the waste collection and shredding step (S10), as it is made of composite materials or is in a state where recycling is impossible due to contamination by cosmetics or food. something to do..

As plastic waste that cannot be recycled, retort food/sunscreen packaging materials that require barrier properties, cosmetic containers with metal/mirrors, etc. are classified as 'OTHER' recycling grade, and 'OTHER' grade plastic waste is collected. Even if it is available, applicable products are extremely rare, and processing through the extrusion process is impossible, so it is disposed of through landfill or incineration. Meanwhile, materials with excellent recycling properties such as PE, PP, and ABS are also used in less than 30% of products with low added value due to problems such as lower physical properties, color restrictions, and off-flavor compared to new materials.

Plastic waste collected and shredded in the waste collection and shredding step (S10) may include empty plastic bottles, plastic dust, and defective products from production process printing.

In the case of empty plastic bottles, the percentage of recycled bottles out of all collected bottles is very low at less than 10%, and PETG and composite material collections are difficult to dispose of at a cost to a waste disposal company.

In the case of plastic dust, defective products from the injection process such as cosmetic containers or food containers are shredded and reused depending on the type of material. Pieces less than 0.5 cm in diameter generated during the shredding process are difficult to reuse, so they are called a type of plastic dust. The dust is being disposed of.

Production process printing defective products refer to defective products that are discarded because ink, etc. is applied to defective products in the printing and post-processing stages after molding, making them difficult to reuse.

Next, a centrifugation step (S20) is performed.

In the centrifugal processing step (S20), the base resin is mixed with the waste shredded in the waste collection and crushing step (S10) and a hardener is added to cure the waste at a certain curing temperature. This is processed to disperse to produce upcycling materials.

It is appropriate that the centrifugal processing step (S20) is centrifuged using centrifugal processing equipment at a temperature of 25 to 75°C and a rotation speed of 100 to 300 rpm for 20 to 30 minutes.

It is appropriate that the base resin in the centrifugal processing step (S20) is an unsaturated polyester resin. The unsaturated polyester resin is preferably at least one selected from polystyrene, polyvinyltoluene, polyallyl ether, polydiacrylate, polymethyl methacrylate, polyvinyltoluene, polyvinyl acetate, polyethylene glycol diacrylate, or dimethyl phthalate. do.

The curing agent can be any commercially available curing agent as long as it can cure unsaturated polyester resin. For example, it may be one or more selected from the group consisting of amine-based compounds, imidazole-based compounds, phenol-based compounds, phosphorus-based compounds, acid anhydride-based compounds, isocyanate compounds, epoxy compounds, aziridine compounds, and metal chelate compounds. More specific examples include methyl ethyl ketone peroxide (MEK-PO), cyclohexanone peroxide (CHPO), benzoyl peroxide (BPO), and t-butyl peroxy benzoate ( Examples include TBPB: t-butylperoxybenzoate).

Meanwhile, a colorant may be added to the base resin in the centrifugal processing step (S20) to change the color of the base resin. That is, both a hardener and a colorant may be added to the base resin in the centrifugal processing step (S20). The colorant can be obtained through commercial purchase, and various colorants may be applied depending on the desired color.

In the centrifugal processing step (S20), the mixed resin obtained by mixing the crushed waste and the base resin can be centrifugally processed through centrifugal processing equipment while adding a hardener and a colorant.

As shown in FIG. 3, the centrifugal processing equipment has a cylindrical shape with an empty interior. Resin, hardener, etc. are applied to the inner wall of the centrifugal processing equipment and rotated at high speed to mix the contents. It is a device. In addition, it is appropriate that the centrifugal processing equipment has a heat generation function and can be set to a desired temperature.

Meanwhile, the centrifugal processing step (S20) improves processability through a manufacturing process of applying the resin into a centrifugal separator to form a layer, and can help to uniformly distribute the shredded waste contained in the base resin. .

Accordingly, the centrifugal processing step (S20) includes a first base resin application step (S21); Mixed resin application step (S22); Second base resin application step (S23); And it may include a centrifugal processing equipment driving step (S24). That is, in the centrifugal processing step (S20), the physical properties of the finished product and the degree of dispersion of the shredded waste can be optimized through the process of applying resin in 3 to 4 layers within the centrifugal processing equipment.

More specifically, the centrifugal processing step (S20) includes a first base resin application step (S21) of mixing and applying a base resin and a hardener to centrifugal processing equipment; A mixed resin application step (S22) in which a mixed resin obtained by mixing the shredded waste prepared in the waste collection and crushing step (S10) and the base resin is applied to the base resin applied in the first base resin application step (S21). ; And it may include a secondary base resin application step (S23) of applying the base resin to the mixture of the crushed waste and base resin applied in the mixing application step (S22). Next, a centrifugal processing equipment driving step (S24) is performed to manufacture upcycling materials. It is appropriate that the centrifugal processing equipment driving step (S24) is operated at a speed of 100 to 300 rpm for 20 to 30 minutes at a temperature of 25 to 75°C through the centrifugal processing equipment.

After performing the centrifugal processing step (S20), as shown in FIG. 4, upcycling material is manufactured, and the crushed waste is uniformly distributed within the base resin.

Next, the upcycling material sheet manufacturing step (S30) is performed.

In the upcycling material sheet manufacturing step (S30), the upcycling material manufactured in the centrifugal separation step (S20) is cut to produce an upcycling material sheet.

Specifically, in the upcycling material sheet manufacturing step (S30), the upcycling material manufactured in the centrifugal separation step (S20) is cut into approximately 60 cm in width and 120 cm in length, and as shown in FIG. 5, the upcycling material is Manufacture sheets.

In addition, in the upcycling material sheet manufacturing step (S30), the sheet cut to 60 cm in width and 120 cm in length is cut again to achieve a shape suitable for the final product.

Next, a polishing step (S40) is performed.

In the polishing step (S40), the upcycling material sheet manufactured in the upcycling material sheet manufacturing step (S30) is polished to manufacture an upcycling material processed product.

Specifically, the polishing step (S40) may involve performing a total of two polishing operations, including primary polishing and secondary polishing.

The polishing step (S40) may be an operation to smooth the surface by grinding the crushed pieces protruding outward after cutting the upcycling material.

After performing the polishing step (S40), as shown in FIG. 6, a finished upcycling material processed product with a smooth surface can be obtained.

Accordingly, the present invention also provides processed upcycling material products made from plastic waste, which are manufactured through the above manufacturing method.

Hereinafter, we will examine in detail the effects of processed upcycling materials made from plastic waste according to the manufacturing method of the present invention through the following examples, comparative examples, and experimental examples.

Example 1. Made from plastic waste Upcycling materials Manufacture of processed products

A processed upcycling material product was manufactured using the plastic waste of Example 1 as a raw material according to the manufacturing process below.

The waste collection and shredding step (S10): PETG waste bottles were collected and shredded to produce shredded waste.

First base resin application step (S21): Polystyrene (base resin), methyl ethyl ketone peroxide (curing agent), and colorant were mixed and applied to the inner peripheral surface of the centrifugal processing equipment.

Mixed resin application step (S22): Mixing the shredded waste produced in the waste collection and crushing step (S10) and polystyrene (base resin) on top of the base resin applied in the first base resin application step (S21). A mixed resin was applied.

Second base resin application step (S23): Polystyrene (base resin) was applied once again on top of the mixed resin mixed with the shredded waste and polystyrene (base resin) applied in the mixing application step (S22).

Centrifugal processing equipment operation step (S24): Upcycling materials were manufactured by operating the centrifugal processing equipment at a temperature of 50°C and a speed of 200 rpm.

Upcycling material sheet manufacturing step (S30): The manufactured upcycling material was cut into 60cm wide and 120cm long to manufacture an upcycling material sheet, and then cut again into a circular shape to take the shape of a button.

Polishing step (S40): The upcycling material sheet cut in the upcycling material sheet manufacturing step (S30) is polished to form a button hole, and the crushed pieces protruding outward are ground to produce a button-shaped upcycling material. Processed products were manufactured.

Example 2 to 5 and Comparative example 1 to 4. Upcycling material processed products made from plastic waste under different processing conditions

The same process as Example 1 was performed, but the processing conditions were different as shown in Tables 1 and 2, and processed products of Examples 2 to 5 and Comparative Examples 1 to 4 were manufactured.

The waste collection and shredding step (S10): PETG waste bottles were collected and shredded to produce shredded waste.

First base resin application step (S21): Polystyrene (base resin), methyl ethyl ketone peroxide (curing agent), and colorant were mixed and applied to the inner peripheral surface of the centrifugal processing equipment.

Mixed resin application step (S22): Mixing the shredded waste produced in the waste collection and crushing step (S10) and polystyrene (base resin) on top of the base resin applied in the first base resin application step (S21). A mixed resin was applied.

Second base resin application step (S23): Polystyrene (base resin) was applied once again on top of the mixed resin mixed with the shredded waste and polystyrene (base resin) applied in the mixing application step (S22).

Centrifugal processing equipment operation step (S24): Upcycling materials were manufactured by operating the centrifugal processing equipment under the temperature conditions in Table 1 and the speed conditions in Table 2.

Upcycling material sheet manufacturing step (S30): The manufactured upcycling material was cut into 60cm wide and 120cm long to manufacture an upcycling material sheet, and then cut again into a circular shape to take the shape of a button.

Polishing step (S40): The upcycling material sheet cut in the upcycling material sheet manufacturing step (S30) is polished to form a button hole, and the crushed pieces protruding outward are ground to produce a button-shaped upcycling material. Processed products were manufactured.

Centrifugal processing equipment processing temperature
(℃) Centrifugal processing equipment processing speed
(rpm) Comparative Example 1 15℃ 200rpm Example 2 25℃ 200rpm Example 1 50℃ 200rpm Example 3 75℃ 200rpm Comparative example 2 85℃ 200rpm

Centrifugal processing equipment processing temperature
(℃) Centrifugal processing equipment processing speed
( rpm ) Comparative Example 3 50℃ 50rpm Example 4 50℃ 100rpm Example 1 50℃ 200rpm Example 5 50℃ 300rpm Comparative example 4 50℃ 350rpm

Comparative example 5. Step (S21) Made from omitted plastic waste Upcycling materials Manufacture of processed products

Step (S21) of Comparative Example 5 was omitted according to the manufacturing process below. Processed upcycling materials were manufactured using plastic waste as a raw material.

The waste collection and shredding step (S10): PETG empty bottles were collected and shredded to produce shredded waste.

Mixed resin application step (S22): A mixed resin mixed with polystyrene (base resin) and the shredded waste prepared in the waste collection and crushing step (S10) was applied to the inner peripheral surface of the centrifugal processing equipment.

Second base resin application step (S23): Polystyrene (base resin) was applied once again on top of the mixed resin mixed with the shredded waste and polystyrene (base resin) applied in the mixing application step (S22).

Centrifugal processing equipment operation step (S24): Upcycling materials were manufactured by operating the centrifugal processing equipment at a temperature of 50°C and a speed of 200 rpm.

Upcycling material sheet manufacturing step (S30): The manufactured upcycling material was cut into 60cm wide and 120cm long to manufacture an upcycling material sheet, and then cut again into a circular shape to take the shape of a button.

Polishing step (S40): The upcycling material sheet cut in the upcycling material sheet manufacturing step (S30) is polished to form a button hole, and the crushed pieces protruding outward are ground to produce a button-shaped upcycling material. Processed products were manufactured.

Comparative example 6. Made using plastic waste as a raw material, omitting step (S23) Upcycling materials Manufacture of processed products

Step (S23) of Comparative Example 6 was omitted according to the manufacturing process below. Processed upcycling materials were manufactured using plastic waste as a raw material.

The waste collection and shredding step (S10): PETG waste bottles were collected and shredded to produce shredded waste.

First base resin application step (S21): Polystyrene (base resin), methyl ethyl ketone peroxide (curing agent), and colorant were mixed and applied to the inner peripheral surface of the centrifugal processing equipment.

Mixed resin application step (S22): Mixing the shredded waste produced in the waste collection and crushing step (S10) and polystyrene (base resin) on top of the base resin applied in the first base resin application step (S21). A mixed resin was applied.

Centrifugal processing equipment operation step (S24): Upcycling materials were manufactured by operating the centrifugal processing equipment at a temperature of 50°C and a speed of 200 rpm.

Upcycling material sheet manufacturing step (S30): The manufactured upcycling material was cut into 60cm wide and 120cm long to manufacture an upcycling material sheet, and then cut again into a circular shape to take the shape of a button.

Polishing step (S40): The upcycling material sheet cut in the upcycling material sheet manufacturing step (S30) is polished to form a button hole, and the crushed pieces protruding outward are ground to produce a button-shaped upcycling material. Processed products were manufactured.

Experiment example 1. Check physical properties

For the upcycling material processed products manufactured in Examples 1 to 5 and Comparative Examples 1 to 6, tensile strength, flexural strength, flexural modulus, and impact strength were confirmed.

The tensile strength measurement method is to make a dumbbell-shaped measurement specimen in accordance with ASTM D 638 (Standard Test Method for Tensile Properties of Plastics) and apply a load (N) in the tensile direction until the specimen breaks, using a universal strength tester. Tensile strength was measured. Through this, the tensile strength (MPa) of the measured specimen was calculated by dividing the maximum load (N) value by the cross-sectional area (m ² ) of the initial specimen.

The impact strength measurement method is to create a notch-shaped measurement specimen in accordance with ASTM D 256 (Standard Test Method for Tensile Properties of Plastics) and use an Izod impactor to obtain the impact strength value. was measured.

Flexural strength and flexural modulus were measured based on ASTM D 790 (Standard Test Method for Tensile Properties of Plastics). The results of the physical properties measured using this measurement method are shown in Table 3 below.

Tensile strength (MPa) Flexural strength (MPa) Flexural modulus (MPa) Impact strength (J/m) Example 1 29 37 3002 68 Example 2 28 35 2994 66 Example 3 27 36 2989 65 Example 4 24 33 2845 62 Example 5 25 32 2873 63 Comparative Example 1 12 12 107 15 Comparative example 2 17 18 2363 35 Comparative example 3 18 17 2434 32 Comparative example 4 19 18 2447 32 Comparative Example 5 11 11 102 12 Comparative Example 6 18 18 2346 32

As a result, compared to Comparative Examples 1 to 6, the processed products of Examples 1 to 5 had an improvement effect in tensile strength (MPa), an effect in increasing flexural strength (MPa), an effect in increasing flexural modulus (MPa), and an impact strength (J/m). ) was found to have an improvement effect.

In Comparative Example 1, the molding temperature was too low at 15°C, so curing did not occur properly, and the physical properties were so poor that it was difficult to maintain the shape. In Comparative Example 2, the molding temperature was too high at 85°C, resulting in shredded material. The waste began to deform and its physical properties tended to be somewhat low. In Comparative Examples 3 and 4, the processing speed of the centrifugal processing equipment was outside the range of 100 to 300 rpm, showing somewhat low physical properties.

In the case of Comparative Example 5, the mixed resin application step (S22), in which polystyrene (base resin), methyl ethyl ketone peroxide (curing agent), and colorant are mixed and applied to the inner peripheral surface of the centrifugal processing equipment, was omitted, so curing did not occur properly. The physical properties were so poor that it was difficult to maintain its shape.

In the case of Comparative Example 6, secondary base resin application in which polystyrene (base resin) is once again applied on top of the mixed resin mixed with the shredded waste and polystyrene (base resin) applied in the mixing application step (S22). Step (S23) was omitted, and the physical properties tended to be somewhat lower than those of Examples 1 to 5.

Experiment example 2. Check the degree of dispersion of crushed pieces

For a number of upcycling material processed products manufactured in Examples 1 to 5 and Comparative Examples 1 to 6, the degree of dispersion of crushed pieces was confirmed.

100 samples of buttons manufactured in Examples 1 to 5 and Comparative Examples 1 to 6 were inspected, and the number of processed products with 10 to 30 broken pieces dispersed, the number of processed products with less than 10 broken pieces dispersed, The number of processed products with more than 30 crushed pieces dispersed was confirmed and shown in Table 4 below.

Number of workpieces with less than 10 shredded pieces Number of processed products with 10 to 30 shredded pieces dispersed Number of processed products dispersed with more than 30 shredded pieces Example 1 One 98 One Example 2 One 97 2 Example 3 One 97 2 Example 4 6 87 7 Example 5 6 88 6 Comparative Example 1 18 65 17 Comparative example 2 20 64 16 Comparative Example 3 33 32 35 Comparative Example 4 35 33 32 Comparative Example 5 4 42 54 Comparative Example 6 Three 44 53

As a result, Examples 1 to 5 showed the highest number of processed products with 10 to 30 crushed pieces dispersed, and through this, the upcycling material processed products made from plastic waste according to the manufacturing method according to the present invention were, It was found that the degree to which the crushed pieces were dispersed was uniform.

In contrast, in the processed products of Comparative Examples 1 to 6, which were processed by omitting some processes or changing conditions, it was confirmed that the crushed pieces were not evenly distributed.

Meanwhile, the processed products in which 10 to 30 crushed pieces obtained in each of Examples 1 to 5 and Comparative Examples 1 to 6 were dispersed were evaluated by an expert to evaluate whether the crushed pieces were appropriately spaced and dispersed within the base resin. The degree of dispersion and aesthetics were evaluated using a 5-point scale, and the average values are shown in Table 5 below.

dispersibility
(average evaluation score) aesthetics
(average evaluation score) Example 1 4.8 4.8 Example 2 4.6 4.6 Example 3 4.6 4.6 Example 4 4.4 4.4 Example 5 4.4 4.4 Comparative Example 1 2.4 1.6 Comparative example 2 2.2 1.2 Comparative example 3 2.6 1.8 Comparative example 4 2.6 1.8 Comparative Example 5 2.2 1.4 Comparative Example 6 2.4 1.2

As a result, it was confirmed that the degree of dispersion of the crushed pieces was different even among the processed products in which 10 to 30 pieces were dispersed. In Examples 1 to 5, the broken pieces were appropriately spaced and dispersed within the base resin. In the case of Comparative Examples 1 to 6, dispersibility was found to be low, with the crushed pieces appearing on one side, and it was confirmed that aesthetics was correspondingly poor.

conclusion.

Through the above Experimental Examples 1 and 2, it was confirmed that the upcycling material processed products made from plastic waste manufactured according to the manufacturing method of the present invention had excellent physical properties and the degree of dispersion of the shredded waste was excellent.

Through Experimental Example 1, the upcycling material processed products made from plastic waste manufactured according to the manufacturing method of the present invention have the effect of improving tensile strength (MPa), increasing flexural strength (MPa), increasing flexural modulus (MPa), It was confirmed that there was an effect of improving the impact strength (J/m), but if some processes were omitted or the processing conditions were outside the numerical range, the tensile strength (MPa), flexural strength (MPa), flexural modulus (MPa), and impact strength It was confirmed that the back appeared low.

Through Experimental Example 2, the number of upcycled materials processed using plastic waste as a raw material manufactured according to the manufacturing method of the present invention had a constant number of crushed wastes per processed product, and the degree of dispersion of the crushed waste within the base resin was also uniform. Therefore, the aesthetics were excellent. However, if some processes are omitted or the processing conditions are outside the numerical range, the number of shredded waste per processed product varies greatly, and the degree of dispersion of the shredded waste within the base resin is also uneven, resulting in poor aesthetics. I was able to.

Accordingly, the present invention collects and shreds plastic waste, mixes base resin with the shredded waste, adds a hardener, and cures it at a certain curing temperature, and centrifugally processes it so that the waste is evenly dispersed within the base resin. , It is useful in terms of waste resource utilization as it can utilize discarded waste. Of course, it has excellent physical properties and is a novel waste resource utilization processed product and manufacturing method that improves aesthetics by uniformly dispersing shredded material within the base resin, making it a plastic product. It is stated that the upcycling material processed products and their manufacturing methods using waste as raw materials have been developed.

Although the present invention has been described with the accompanying drawings, this comparative example, which includes the gist of the present invention, is only one example among various embodiments, and is intended to enable those skilled in the art to easily implement the invention. It is clear that the present invention is not limited to the embodiments described above. Accordingly, the scope of protection of the present invention should be interpreted in accordance with the following claims, and all technical ideas within the equivalent scope by change, substitution, substitution, etc. without departing from the gist of the present invention are subject to the rights of the present invention. will be included In addition, it is clarified that some of the configurations in the drawings are provided in an exaggerated or reduced form compared to the actual figure for the purpose of explaining the configuration more clearly.

(S10): Waste collection and shredding phase
(S20): Centrifugal processing step
(S21): First base resin application step
(S22): Mixed resin application step
(S23): Second base resin application step
(S24): Centrifugal processing equipment operation stage
(S30): Manufacturing step of cut upcycling material sheet
(S40): Polishing step

Claims (5)

Waste collection and shredding step (S10) of collecting and shredding plastic waste;
In the waste collection and shredding step (S10), base resin is mixed with the shredded waste, a hardener is added and cured at a certain curing temperature, and the waste is dispersed within the base resin through centrifugal processing to produce an upcycling material. Centrifugal separation step (S20);
An upcycling material sheet manufacturing step (S30) of cutting the upcycling material produced in the centrifugal separation step (S20) to produce an upcycling material sheet;
A polishing step (S40) of manufacturing an upcycling material processed product by polishing the upcycling material sheet manufactured in the cut upcycling material sheet manufacturing step (S30); Manufacturing method.
According to paragraph 1,
The plastic waste shredded in the waste collection and shredding step (S10) is used as a raw material, characterized in that it has a relatively high melting point compared to the curing temperature of the base resin so as not to melt in the centrifugal processing step (S20). Method for manufacturing processed products from upcycled materials.
According to paragraph 1,
A method of manufacturing a processed upcycling material product using plastic waste as a raw material, characterized in that the base resin in the centrifugal processing step (S20) is an unsaturated polyester resin.
The centrifugal processing step (S20) includes a first base resin application step (S21); Mixed resin application step (S22); Second base resin application step (S23); and a centrifugal separation equipment driving step (S24).
An upcycling material processed product using plastic waste as a raw material, characterized in that it is manufactured through the manufacturing method of claim 1.