KR20190097431A - Method for manufacturing artificial wood with coffee deposits and production thereof - Google Patents

Abstract

The present invention relates to a method for producing artificial wood using coffee grounds, which is a technology for producing eco-friendly building materials, and a product thereof. More specifically, the present invention relates to a method for producing artificial wood using coffee grounds and a product thereof, wherein the method comprises: a primary drying step of drying coffee grounds to have the water content of 5% at a drying temperature of 80 to 100°C; a secondary drying step of drying the first-dried coffee grounds to have the water content of 0.1 to 0.5%; a step of preparing a pellet material by weighing and mixing the second-dried coffee grounds and additive materials for pellet production; a step of extruding the pellet materials to produce pellets; and a step of extrusion molding a product by adding a foaming agent to the pellets.

Description

Manufacture method of artificial wood using coffee grounds and products thereof {METHOD FOR MANUFACTURING ARTIFICIAL WOOD WITH COFFEE DEPOSITS AND PRODUCTION THEREOF}

The present invention relates to a method for manufacturing artificial wood using coffee grounds, and to a product thereof. More specifically, the artificial ground using coffee grounds, which can be used as building materials, interior materials, eco-friendly building finishes, and high-strength structural materials, has coffee as a main component. The present invention relates to a method for producing wood and to a product thereof.

In general, natural wood is a useful material for human resources both in the East and the West, and is widely used in various fields including crafts, architecture, and civil engineering.

However, the rapidly increasing demand for natural timber has resulted in a shortage of timber supply and almost dependent on imports. In particular, timber is a limited natural resource, it is not enough to meet the rapidly increasing demand in terms of environmental protection and conservation. Accordingly, various natural wood substitutes or new materials are being developed as artificial materials.

Eco-friendly or eco-building materials may refer to eco-friendly building materials with low generation of harmful substances and eco-friendly and low energy building materials technology that minimizes the generation of environmental load (CO2) and energy consumption.

In particular, eco-friendly building materials are developed with high thermal efficiency, high functionality, and environmentally friendly building materials to reduce CO2 emissions, reduce energy consumption, and secure indoor comfort in the construction materials industry. Thermal efficiency shell technology, high performance windows and the like.

For example, Patent Document 1 according to the prior art is known heat insulating material and a method for producing a heat insulating material made of coffee grounds and waste paper sludge. However, the patent document 1 may be used only as a packaging material or a heat insulating material as a molding, but has a disadvantage in that structural strength and durability such as wood may be used as a structural material, a building interior material or a building exterior material.

In addition, Patent Document 2 discloses a method of manufacturing a block board for interior using a coffee powder and a technology of a block board for interior manufacturing thereby. However, Patent Document 2 does not quickly control the water content in the coffee sludge heating and grinding step, it does not provide a way to produce a large amount of environmentally friendly building materials in the later step, and the strength and durability as a structural material using artificial wood There is no weight reduction plan, and there is a problem of rising manufacturing cost.

In addition, the technology using the coffee powder or coffee grounds of the prior art has a disadvantage that the handling is very difficult because the weight is heavy compared to the volume simply by adding the synthetic resin material.

Korea Patent Publication No. 10-2016-0010072 (2016.01.06.) Korea Patent Registration No. 10-1733306 (2017.04.27.)

It is an object of the present invention to provide a method for producing artificial wood using coffee grounds having environmentally friendly, high strength, mass production, relatively light weight, and high strength.

According to one aspect of the invention, the first drying step of drying the coffee grounds to a water content of 5% at a drying temperature of 80 ℃ ~ 100 ℃; A second drying step of drying the coffee grounds first dried to a water content of 0.1 to 0.5%; Preparing a pellet material by weighing and mixing the secondary dried coffee grounds and the additive material for pellet production; Extruding the pellet material to produce pellets; And extruding the product by adding a blowing agent to the pellets. A method of manufacturing artificial wood using coffee grounds may be provided.

In addition, before the first drying step, the collected coffee grounds may further include a step of removing foreign matters through a filtering device having a filtering network and an electromagnet.

In addition, the primary drying step, by operating a plurality of heaters in the interior of the primary drying apparatus for drying the coffee grounds, and spraying the dry air toward the coffee grounds through a nozzle arranged between the heaters The process may further include, wherein the air dryer has a lower absolute humidity than air in the primary drying apparatus, lowers the dew point temperature in the primary drying apparatus, and then exhausts the exhaust apparatus installed in the primary drying apparatus. Can be discharged to the outside.

In addition, the secondary drying step, the first dried coffee grounds may be heated at a drying temperature 100 ℃ ~ 130 ℃.

In addition, in the preparing of the pellet material, based on the weight percent (wt%), the coffee dregs 51 to 70 wt% of the second drying; And 30 to 40 wt% of a thermoplastic resin selected from polypropylene, polyethylene, and polyethylene terephthalate, 2 to 6 wt% of an acrylic processing aid, 0.5 to 1 wt% of a silicone dispersant, and 0.1 to 1 rosin powder as the additive material for pellet production. 0.5 wt% can be mixed with each other to become a pellet material.

In addition, in the step of preparing the pellets, the pellet material may be made into pellets at an extrusion temperature of 170 ℃ to 230 ℃ through an extruder of the pellet manufacturing apparatus.

In addition, in the step of extruding the product, a foaming agent of 0.05 to 1 wt% content is included in the pellet, the foaming agent and the pellet is extruded at an extrusion temperature of 170 ℃ to 230 ℃, the artificial wood which is the product to be produced Can be.

According to another aspect of the present invention, an article made by the method of manufacturing artificial wood using the above-mentioned coffee grounds may be provided.

In addition, the product is artificial wood, coffee grounds 51 to 70 wt%; 30 to 40 wt% of any one of a thermoplastic resin selected from polypropylene, polyethylene, and polyethylene terephthalate; 2 to 6 wt% acrylic processing aid; Silicone dispersant 0.5-1 wt%; Rosin powder 0.1-0.5 wt%; And 0.05 to 1 wt% of a blowing agent.

According to an aspect of the present invention, a method of manufacturing artificial wood using coffee grounds and a product thereof can replace wood, which is a limited natural resource, by using a large amount of coffee grounds, which are almost discarded after coffee extraction, as a main raw material. It is possible to reduce the weight while increasing the rigidity, there is an advantage that can be manufactured for structural materials, reinforcement materials and interior materials.

According to an aspect of the present invention, a method of manufacturing artificial wood using coffee grounds and a product thereof include more than half of recycled coffee grounds, that is, it can be used as a main raw material. By adjusting it, there is an advantage to maximize the quality of the raw material formulation and extrusion product at the time of manufacture.

The manufacturing method of the artificial wood using the coffee grounds of the present invention and a product thereof are prepared by measuring and mixing coffee grounds and additional materials as a pellet material, and then preparing pellets, and then adding a blowing agent to the manufactured pellets by extrusion. By manufacturing, there is an advantage that can produce a large amount of high-quality artificial wood.

The method of manufacturing artificial wood using coffee grounds according to an aspect of the present invention, and a product thereof, have an advantage of manufacturing a more environmentally friendly building material by using foreign materials, metals, and the like separated from coffee grounds.

The method of manufacturing artificial wood using coffee grounds according to an aspect of the present invention and its products are environmentally friendly materials that do not detect foreign matters and metals, and can be applied to buildings for residential use, even when disposed of after use. Secondary environmental pollution can be reduced.

1 is a process chart according to the manufacturing method of artificial wood using coffee grounds according to an embodiment of the present invention.
2 is a flow chart of the manufacturing method shown in FIG.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the present embodiments are intended to complete the disclosure of the present invention, and the general knowledge in the art to which the present invention pertains. It is provided to fully convey the scope of the invention to those skilled in the art, and the invention is defined by the description of the claims.

Meanwhile, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, “comprises” and / or “comprising” refers to the presence of one or more other components, steps, operations and / or elements in the components, steps, operations and / or elements mentioned. Or does not exclude the addition. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the drawings, Figure 1 is a process chart according to the manufacturing method of artificial wood using coffee grounds according to an embodiment of the present invention.

Referring to Figure 1, the manufacturing method of the present invention by removing the foreign matter or metal from the coffee grounds and drying the coffee grounds of even particles passed through the filter net in multiple stages, the production can be used to adjust the moisture content to an optimized value It can be realized by the device 10.

For example, the manufacturing apparatus 10 includes a filtration apparatus 100, a primary drying apparatus 200, a secondary drying apparatus 300, a material mixing apparatus 400, a pellet manufacturing apparatus 500, and a foam extrusion apparatus 600. It may include.

The filtering device 100 may be a device capable of filtering and discharging the metal material from the coffee grounds collected by the magnetic force of the electromagnet from the water-containing mixture, or filtering foreign matter through the filter net.

The primary drying apparatus 200 may have a device configuration for rapidly drying coffee grounds from which foreign matters and metals have been removed through the filtering device 100.

Since coffee grounds may have various moisture characteristics as dried or unspecified states according to the collection situation, it is possible to quickly make them at a moisture content suitable for the manufacture of the artificial wood of the present invention to secure economical economics of manufacturing. Is required.

To this end, the primary drying apparatus 200 is basically an in-line type device equipped with a conveying equipment, and has a drying efficiency of 1 hour per ton, up to 5% moisture content at 80 ℃ ~ 100 ℃ during the first drying of coffee grounds There may be.

In particular, the primary drying apparatus 200 is an inline type drying furnace, and includes a plurality of heaters 210 disposed above or below in the traveling direction in which coffee grounds are conveyed. In addition, the primary drying apparatus 200 is arranged between the heaters 210, the nozzle 220 for spraying the dry air, the air cooling device 230 for supplying the dry air to be supplied to the nozzle 220, It may include an exhaust device 240 for discharging or venting the internal air of the primary drying device 200 to the outside.

The heater 210 may be an electric resistance heating apparatus, a heating means for generating radiant heat, or the like, and may be provided in various shapes and numbers to correspond to the size and capacity of the apparatus.

The nozzle 220 is manufactured to inject dry air from the upper or lower portion of the coffee grounds toward the coffee grounds or toward the space where the coffee grounds move, and may be connected to the air cooling device 230 through a pipe. .

The air cooling device 230 may include a compressor, a storage tank, a safety valve, a heat exchanger, and a pipe, and may remove moisture from air supplied from the storage tank toward the nozzle 220 and serve to create a dry air. have.

The exhaust device 240 may include a duct connected to the inside and the outside of the drying furnace of the primary drying device 200 and an air exhauster installed at the end of the duct.

The primary drying apparatus 200 supplies the heat of the heater 210 and the dry air of the nozzle 220 at the same time to coffee grounds and is discharged by the exhaust device 240, thereby maximizing the drying efficiency.

In particular, the dry air may have a lower absolute humidity than air inside the primary drying apparatus 200, and after the dew point temperature of the primary drying apparatus 200 is lowered, the primary drying apparatus 200 may be lowered. It may be discharged to the outside through the exhaust device 240 installed in.

Therefore, the moisture content of the first dried coffee grounds can be more precisely controlled while passing through the secondary drying device (300).

The secondary drying apparatus 300 may be an apparatus for drying coffee grounds via the primary drying apparatus 200 to 100% or less of a water content at 100 ° C to 130 ° C. The secondary drying apparatus 300 may be configured similarly to the configuration of the primary drying apparatus 200 or may simply be a drying furnace having a heating means and a transfer means.

The material mixing device 400 may be a metered dose mixer for measuring and mixing secondary dried coffee grounds and thermoplastic resins, processing aids, dispersants, and rosin powder.

Through the manufacturing apparatus 10, the present invention measures and mixes thermoplastic resins, processing aids, dispersants and rosin powders in coffee grounds with a water content of 0.1 to 0.5%, and then kneads and extrudes pellets, After the addition of a blowing agent to the pellets it can have a feature that can be produced by extrusion molding the product.

In particular, since the artificial wood, which is a product of the present invention using coffee grounds having a water content of 0.5% or less and foreign substances and metals removed, is extruded using pellets and foaming agents, it is bulk evacuated and lightweight. It is possible to exhibit contrast high strength properties.

That is, the present invention may be a lightweight artificial wood that is manufactured through a foam extrusion process by mixing thermoplastic resin and foaming agent with coffee grounds discarded as garbage in daily life.

In particular, the present invention contains not less than just a portion of coffee grounds in the manufacture of artificial wood, but contains more than half of coffee grounds relative to the total weight percent (wt%), while maximizing the recycling efficiency of coffee grounds, Compared with the building materials of general wood, there is an advantage that it can have a structural feature of light weight and high strength.

For example, the components of the artificial wood of the present invention has 51 to 70% by weight (wt%) of coffee grounds. Here, when the coffee grounds are 50wt% or less, the characteristics as artificial wood may not be activated, and when 70wt% or more, structural strength may be lowered and manufacturing production efficiency may be lowered. Therefore, the value of 51 to 70% by weight of the component ratio of coffee grounds can enable high strength and low weight artificial wood extrusion by using coffee grounds processed to have a water content of 0.1 to 0.5% through primary and secondary drying. A quantitative characteristic value that can produce a significantly new and significantly superior effect, which can be meaningful (e.g., critical) in relation to the moisture content of coffee grounds, the main raw material of artificial wood, and can be appropriately selected by those skilled in the art. Maybe not.

The components of the artificial wood of the present invention are made of pellets by mixing additional materials for producing pellets with coffee grounds, and then composed of optimized components that can be extruded together with foams.

In one embodiment, the additive material and coffee grounds for pellet production may be metered and mixed by the material mixing device (400). In particular, the additive material for pellet production includes 30 to 40 wt% of thermoplastic resin selected from polypropylene, polyethylene, and polyethylene terephthalate, 2 to 6 wt% of acrylic processing aid, 0.5 to 1 wt% of silicone dispersant, and rosin powder And 0.1 to 0.5 wt%.

At this time, when the content of the thermoplastic resin is 30 wt% or less, the force that binds the coffee grounds to each other is drastically lowered, pellet production and foam extrusion may be very difficult, on the contrary, if the content is 40 wt% or more, the production cost is higher As it may rise, problems with product quality related to texture, strength, and weight as artificial wood may occur, and thus may have a critical meaning.

The pellet may then be produced by the pellet manufacturing apparatus 500. Pellet manufacturing apparatus 500 is a kneader 510 for first kneading the raw materials supplied from the material mixing device 400, and pellets while heating the raw material supplied from the kneader 510 to a temperature of 170 ℃ to 230 ℃ Extruder 520 to be extruded, and the cutter 530 is installed in front of the extrusion nozzle of the extruder 520 to cut the pellet extrudate to the pellet specification.

The pellets made from the pellet manufacturing apparatus 500 may be supplied toward the foam extrusion apparatus 600 through a feeder or a conveying apparatus.

The foam extrusion apparatus 600 may be supplied with pellets and a foaming agent to perform foam extrusion molding to make artificial wood. Here, the blowing agent is 0.05 to 1 wt%, which may mean a thermally expandable blowing agent in which a low boiling hydrocarbon is placed in a polymer shell. Thermally expandable blowing agents may be various types of materials generally known, and therefore may not be limited to particular products.

That is, the artificial wood 800 manufactured by the manufacturing method according to the present invention can be made by the manufacturing method described below, wherein coffee grounds 51 to 70 wt%, polypropylene, polyethylene, polyethylene terephthalate of 30 to 40 wt% of any selected thermoplastic resin, 2 to 6 wt% of acrylic processing aid, 0.5 to 1 wt% of silicone dispersant, 0.1 to 0.5 wt% of rosin powder, and 0.05 to 1 wt% of blowing agent. Can be.

Hereinafter, a method of manufacturing artificial wood using coffee grounds according to the present invention.

1 and 2, the coffee grounds are performed through the above-described filtration device 100, and the metal material or foreign matter is removed through step S100, and then supplied to the primary drying device 200. Can be.

In the step S100 of removing the foreign matter, the filtering network may be a means for filtering coffee ground particles having a size of 10 to 50 mesh (eg, a sieve having 10 to 50 eyes between 1 inch in a standard plane of a plane).

A conveyor belt or a powder transfer device is further installed between the filtration device 100 and the primary drying device 200, so that a method of manufacturing artificial wood may be performed by an automated process.

The filtered coffee grounds are subjected to the first drying step (S200) of drying the coffee grounds up to 5% water content at a drying temperature of 80 ℃ ~ 100 ℃. At this time, the plurality of heaters 210 are operated inside the primary drying apparatus 200 for drying the coffee grounds, and the dry air is directed toward the coffee grounds through the nozzles 220 arranged between the heaters 210. The process of spraying is done. That is, using the heat of the heater 210 and the dry air of the nozzle 220, since the dry air efficiently controls the dew point of the moisture generated from the coffee grounds, the drying speed and throughput can be maximized compared to the general drying furnace.

And, in order to more precisely control the moisture content, the secondary drying step (S300) for drying the first dried coffee grounds to a water content of 0.1 to 0.5% may be carried out. In the second drying step (S300) by heating the first dried coffee grounds at a drying temperature of 100 ℃ ~ 130 ℃, it is possible to make a raw material required for pellet production.

Thereafter, the step S400 of preparing the pellet material may be performed by weighing and mixing the secondary dried coffee grounds and the additional material for preparing the pellets.

Based on weight percent (wt%), the main material for making pellets may be 51 to 70 wt% of the primary and secondary dried coffee grounds.

In addition, the additive material for producing pellets is 30 to 40 wt% of any one selected from polypropylene, polyethylene and polyethylene terephthalate, 2 to 6 wt% of acrylic processing aid, 0.5 to 1 wt% of silicone dispersant, and 0.1 to 0.5 rosin powder. wt%.

The main material and additional material for producing such pellets are mixed with each other in a weighed state to become pellet materials, and then can be quantitatively supplied or introduced into the pellet manufacturing apparatus 500.

The pellet manufacturing apparatus 500 may perform a step (S500) of extruding the pellet material, cutting, and removing the moisture of the pellet to prepare the pellet. For example, in the step of preparing the pellets (S500), the pellet material may be made into pellets at an extrusion temperature of 170 ℃ to 230 ℃ through the extruder 520 of the pellet manufacturing apparatus 500.

The pellets thus produced are fed into the foam extrusion apparatus 600.

The foam extrusion apparatus 600 extrudes a product by adding a blowing agent to a pellet. For example, in the step of extrusion molding, a foaming agent in a content of 0.05 to 1 wt% is included in the pellet, and the foaming agent and the pellet are extruded at an extrusion temperature of 170 ° C. to 230 ° C., so that a product artificial wood 800 may be manufactured.

Here, the artificial wood 800 may have a variety of shapes and standards, such as square, channel type to correspond to the cross-sectional shape of the extrusion nozzle of the foam extrusion apparatus 600.

Artificial wood 800 can compensate for many of the various shortcomings of natural wood.

That is, natural wood can be fire resistant, very expensive, have limited resource use, have high elastic deformation (e.g. warping or bending due to moisture), high corrosiveness, and relatively low durability due to deformation and alteration. have.

On the other hand, since the artificial wood 800 is relatively lightweight as 70% of the weight of the natural wood through the foam molding, it may be very easy to transport, handle, and manage.

In addition, the artificial wood 800 can perform environmental protection, natural wood resource protection by recycling coffee grounds, can be applied to the building of residential use, and then discarded after use as an environmentally friendly material, resulting in 2 The secondary environmental pollution can be reduced.

Artificial wood 800 has a strength and durability more than 1.2 times than natural wood, the utilization is very high, there is an advantage that can maximize the performance of the building material.

For example, as a comparative example, pine, which is a natural wood, has a longitudinal compressive strength of 430 kg / cm 2, while the artificial wood 800 manufactured by the present invention has a relatively superior strength as the longitudinal compressive strength of 516 kg / cm 2.

In addition, natural wood may include a water content of 10 to 20% by itself, and when exposed to moisture or moisture, its water content increases, making it unsuitable for use or having a very poor adhesive performance.

On the contrary, the artificial wood 800 of the present invention is lightly foamed and molded, and is very resistant to moisture, including thermoplastic resins and natural rosin components, and ensures stability according to building construction, and adheres to interior and exterior materials or decks. It can be utilized as a construction material, the occurrence of bending deformation due to moisture can be suppressed, there is an advantage to secure the adhesive performance.

In addition, the manufacturing method of the artificial wood using the coffee grounds of the present invention and its products to remove moisture from the collected coffee grounds quickly and precisely to have a moisture content of the raw material required for the artificial wood, while exhibiting sufficient strength as an artificial wood In addition, the time and cost required for the manufacture of artificial wood can be reduced.

100: filter device 200: primary drying device
300: secondary drying device 400: material mixing device
500: pellet manufacturing apparatus 600: foam extrusion apparatus

Claims (9)

A first drying step of drying coffee grounds to a water content of 5% at a drying temperature of 80 ° C. to 100 ° C .;
A second drying step of drying the coffee grounds first dried to a water content of 0.1 to 0.5%;
Preparing a pellet material by weighing and mixing the secondary dried coffee grounds and the additive material for pellet production;
Extruding the pellet material to produce pellets; And
Method of producing artificial wood using coffee grounds, comprising; extruding the product by adding a blowing agent to the pellet.
The method of claim 1,
Before the first drying step,
The collected coffee grounds are filtered through a filtering device having a filtering net and an electromagnet, and the method for producing artificial wood using coffee grounds further comprising the step of removing foreign substances.
The method of claim 1,
The first drying step,
Operating a plurality of heaters inside the primary drying apparatus for drying the coffee grounds, and spraying a dry air toward the coffee grounds through nozzles arranged between the heaters,
The dry air is lower than the absolute humidity of the air inside the primary drying device, the dew point temperature of the inside of the primary drying device is lowered, and then discharged to the outside through the exhaust device installed in the primary drying device Method for producing artificial wood using the coffee grounds characterized in that.
The method of claim 1,
The secondary drying step,
The first dried coffee grounds manufacturing method of artificial wood using coffee grounds, characterized in that for heating at a drying temperature of 100 ℃ ~ 130 ℃.
The method of claim 1,
In the step of preparing the pellet material,
51 to 70 wt% of the coffee grounds secondary dried by weight percent (wt%); And
As the additive material for pellet production, 30 to 40 wt% of a thermoplastic resin selected from polypropylene, polyethylene, and polyethylene terephthalate, 2 to 6 wt% of an acrylic processing aid, 0.5 to 1 wt% of a silicone dispersant, and 0.1 to 0.5 rosin powder A method for producing artificial wood using coffee grounds, characterized in that wt% is mixed with each other to form a pellet material.
The method of claim 5,
In the step of preparing the pellets,
The pellet material is a method for producing artificial wood using coffee grounds, characterized in that the pellet is made into pellets at an extrusion temperature of 170 ℃ to 230 ℃ through an extruder of the pellet manufacturing apparatus.
The method of claim 6,
In the step of extruding the product,
A foaming agent of 0.05 to 1 wt% content is included in the pellets, and the foaming agent and pellets are extruded at an extrusion temperature of 170 ° C to 230 ° C, so that the artificial wood, which is the product, is made of artificial wood using coffee grounds. Manufacturing method.
An article made by the method for producing artificial wood using the coffee grounds according to any one of claims 1 to 7.
The method of claim 8,
Artificial wood, which is the manufactured product,
Coffee grounds 51 to 70 wt%;
30 to 40 wt% of any one of a thermoplastic resin selected from polypropylene, polyethylene, and polyethylene terephthalate;
2 to 6 wt% acrylic processing aid;
Silicone dispersant 0.5-1 wt%;
Rosin powder 0.1-0.5 wt%; And
0.05 to 1 wt% blowing agent; manufactured by the manufacturing method of artificial wood using coffee grounds comprising a.

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