KR102193679B1 - Filament composition for 3d printer, manufacturing method of filament using filament composition for 3d printer, filament thereby, sheets and fabrics using the same - Google Patents

Abstract

The present invention provides: a filament composition for a 3D printer comprising 5 to 20 parts by weight of nanocarbon-metal hybrid particles based on 100 parts by weight of a thermoplastic elastomer (TPE); a filament manufacturing method using the filament composition; a filament manufactured thereby; and plates and fabrics manufactured by using the filament. When the filament for a 3D printer according to the present invention is used, it is possible to output plates and fabrics having excellent insulation and thermal conductivity.

Description

Filament composition for 3D printer, filament manufacturing method using filament composition, filament manufactured thereby, plate and fabric manufactured using filament {FILAMENT COMPOSITION FOR 3D PRINTER, MANUFACTURING METHOD OF FILAMENT USING FILAMENT COMPOSITION FOR 3D PRINTER, FILAMENT THEREBY, SHEETS AND FABRICS USING THE SAME}

The present invention relates to a filament composition for a 3D printer, a filament manufacturing method using a filament composition, a filament manufactured thereby, a plate material and a fabric manufactured using the filament, and more particularly, 3D including nano carbon-metal hybrid particles It relates to a printer filament composition, a filament manufacturing method using the filament composition, a filament manufactured thereby, a plate material and a fabric manufactured using the filament.

A 3D (3-Dimension) printer is an equipment that produces a real three-dimensional shape based on the input 3D drawing as it is to print a type or picture. Recently, 3D printing technology has become a very hot issue, and it is expanding to the fields of automobiles, medical care, arts, and education, and is widely used for making various models.

The principle of 3D printers can be divided into cutting type and stacking type, and most of 3D printers that are actually applied are stacked type without material loss.

There are about 20 methods that use the stacking principle, but the most commonly used methods are SLA (Stereolithography Apparatus), FDM (Fused Deposition Modeling) or FFF (Fused Filament Fabrication), and SLS (Selective Laser Sintering) methods. .

In the case of SLA, a laser beam is projected into a water tank containing a liquid photocurable resin to form a shape, and an epoxy-type photopolymer, a photocurable resin, is mainly used.

On the other hand, FDM (or FFF), which is a method in which the input filament-like material is ejected in a molten state from the nozzle of the printer moving in the X, Y, and Z axes, is shaped in three dimensions, uses thermoplastic plastic as the main material.

On the other hand, SLS implements 3D printing by selectively sintering a water tank containing powdery materials such as metal, plastic, and ceramic powder.

Among the three methods, the FDM method, which uses a thermoplastic plastic in the form of a filament, is the most widely popular because the price of a 3D printer is relatively inexpensive and printing speed is faster than other methods. In general, the FDM method has excellent bed adhesion and interlayer adhesion when forming 3D sculptures, and because of its good shape stability, polylactic acid (PLA), ABS (Acrylonitrile Butadiene Styrene), HDPE, and polycarbonate ( Materials such as polycarbonate and PC) are usefully used.

However, the above materials do not have elasticity, so they are disadvantageous for making educational models or toys, and have disadvantages in that odors may occur or components harmful to the human body may appear when making sculptures.

Republic of Korea Patent Publication No. 10-2017-0060373 (published on January 1, 2017)

An object of the present invention is to provide a filament composition for a 3D printer capable of manufacturing a plate and fabric having excellent insulation and thermal conductivity using a 3D printer.

In addition, another object of the present invention is to provide a filament manufacturing method using the filament composition and a filament manufactured thereby.

Another object of the present invention is to provide a plate and fabric using the filament.

The problem to be solved by the present invention is not limited to the problem(s) mentioned above, and another problem(s) that is not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the present invention provides a filament composition for a 3D printer, comprising 5 to 20 parts by weight of nano-carbon-metal hybrid particles, based on 100 parts by weight of a thermoplastic elastomer (TPE). .

The thermoplastic elastomer (TPE) may be a polyester-based thermoplastic elastomer (TPEE).

The nano-carbon-metal hybrid particles may be graphene-aluminum hybrid particles.

The nano-carbon-metal hybrid particles may have a particle size of 10 to 200 μm.

The graphene-aluminum hybrid particle may be a mixture of graphene and aluminum in a weight ratio of 1:9 to 3:7.

The graphene-aluminum hybrid particles may be prepared using aluminum having a particle size of 5 to 50 μm.

The graphene-aluminum hybrid particle may be prepared using graphene having a size of 5 to 10 μm and a thickness of 3 to 10 nm.

The present invention also comprises the steps of preparing a thermoplastic elastomer (TPE); Preparing nanocarbon-metal hybrid particles; Preparing a mixture by mixing 5 to 20 parts by weight of the nano-carbon-metal hybrid particles with respect to 100 parts by weight of the thermoplastic elastomer (TPE); And extruding the mixture to prepare a filament; It provides a method for manufacturing a filament for a 3D printer comprising a.

In addition, the present invention is prepared by extruding a filament composition for a 3D printer, wherein the filament composition for a 3D printer includes 5 to 20 parts by weight of nano-carbon-metal hybrid particles based on 100 parts by weight of a thermoplastic elastomer (TPE). It provides a filament for a 3D printer, characterized in that.

The filament may have a diameter of 1.0 to 3.0 mm.

The filament may have a Shore D hardness of 55 to 60.

The present invention also provides a sheet material manufactured by a 3D printer using a filament containing 5 to 20 parts by weight of nano-carbon-metal hybrid particles based on 100 parts by weight of a thermoplastic elastomer (TPE).

The present invention also provides a fabric manufactured by a 3D printer using a filament containing 5 to 20 parts by weight of nano-carbon-metal hybrid particles based on 100 parts by weight of a thermoplastic elastomer (TPE).

When the filament for a 3D printer according to the present invention is used, it is possible to output plate materials and fabrics having excellent insulation and thermal conductivity.

As described above, the plate and fabric according to the present invention have excellent insulation and thermal conductivity, and thus can be easily used for temperature control devices and fibers.

The effects of the present invention are not limited to the above effects, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a flowchart of a method for manufacturing a filament composition for a 3D printer according to an embodiment of the present invention.
2 is a flowchart of a method for manufacturing a filament for a 3D printer according to an embodiment of the present invention.
3 is a graph showing the thermal conductivity of filaments prepared according to Examples and Comparative Examples of the present invention.

In the following description, it should be noted that only parts necessary to understand the embodiments of the present invention will be described, and descriptions of other parts may be omitted without distracting the gist of the present invention.

The terms or words used in the specification and claims described below should not be construed as being limited to a conventional or dictionary meaning, and the inventor is appropriate as a concept of terms in order to describe his own invention in the best way. It should be interpreted as a meaning and concept consistent with the technical idea of the present invention on the basis of the principle that it can be defined. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only preferred embodiments of the present invention, and do not represent all the technical spirit of the present invention, and various equivalents that can replace them at the time of application And it should be understood that there may be variations.

The term "thermo plastic elastomer (TPE)" of the present invention refers to a material that has both the elasticity of the existing rubber and the processability of the thermoplastic resin, as a representative example of a styrenic block copolymer (SBC) , Olefin-based (thermo plastic olefinic elastomer, TPO), urethane-based (thermo plastic polyurethane, TPU), amide-based (thermo plastic polyamide, TPAE), polyester-based (thermo plastic polyester elastomer, TPEE), and the like.

The term "extruder" of the present invention refers to a device that melts raw materials and injects them into a mold to shape them into a desired shape, and hot melt extrusion (HME) technology is used to manufacture filaments for 3D printers of the FDM method. Is used. When manufacturing a functional filament, an additive suitable for its function must be uniformly dispersed in the filament, and the filament is ejected through a hole having a small diameter while the polymer and the additive are heated and mixed uniformly. The plastic injection machine used in the present invention may use any of the commercially available products.

The term "three-dimension printer" of the present invention refers to an equipment for manufacturing a three-dimensional object by processing and laminating materials such as liquid, powder-type resin, and metal, and according to one specific example, resin extrusion molding It may be a 3D printer of the (fused deposition modeling, FDM) method. "Resin extrusion molding method" refers to a method in which a thermoplastic material in the form of a filament is melted in a nozzle and output in the form of a thin film. The nozzle radiates high heat enough to melt the plastic, and the emitted plastic is cured at room temperature. .

The term "filament" of the present invention refers to a material for a 3D printer in the shape of a thread that is injected through an injection machine based on a thermoplastic resin or a thermoplastic elastomer.

Hereinafter, the present invention will be described in detail.

Filament composition and manufacturing method thereof

According to an aspect of the present invention, there is provided a filament composition for a 3D printer of a method in which a thermoplastic elastomer (TPE) is melted and laminated (FDM method).

The filament composition may include 5 to 20 parts by weight of nano-carbon-metal hybrid particles based on 100 parts by weight of a thermoplastic elastomer (TPE). When the content of the nano-carbon-metal hybrid particles is less than 5, thermal conductivity may be low, and when the content of the nano-carbon-metal hybrid particles is more than 20, electrical insulation cannot be maintained.

The thermoplastic elastomer (TPE) is a component that imparts elasticity and flexibility in the filament composition for 3D printers, and is a styrene-based (thermo plastic styrenic block copolymer, SBC), an olefin-based (thermo plastic olefinic elastomer, TPO), It may be one or more selected from the group consisting of urethane-based (thermo plastic polyurethane, TPU), amide-based (thermo plastic polyamide, TPAE), and polyester-based (thermo plastic polyester elastomer, TPEE), and specifically, polyester-based thermoplastic elastomer. (thermo plastic polyester elastomer, TPEE), and more specifically, it may be a thermoplastic polyether ester elastomer.

The nano-carbon-metal hybrid particle is a component for improving insulation and thermal conductivity in the filament composition for a 3D printer, and specifically, the nano-carbon-metal hybrid particle may be a graphene-aluminum hybrid particle.

The graphene-aluminum hybrid particles of graphene and aluminum may be mixed in a weight ratio of 1:9 to 3:7, specifically in a weight ratio of 3:7. When the graphene-aluminum hybrid particles are mixed at the weight ratio, thermal conductivity can be maximized while maintaining insulation.

The aluminum may be a component for improving insulation and thermal conductivity properties.

On the other hand, the aluminum has excellent thermal conductivity, and since the aluminum has a core-shell structure by forming an oxide film in air, there is an effect of excellent electrical insulation.

The aluminum may be prepared using aluminum having a particle size of 5 to 50 μm.

Specifically, aluminum may be prepared using aluminum having a particle size of 5 to 50 μm and various particle sizes. When aluminum having various particle sizes within 5 to 50 μm is used, voids between particles are reduced, and thus thermal conductivity is excellent.

When the particle size of the aluminum is less than 5 μm, graphene cannot be surrounded and embedded in the aluminum particles, and when the particle size of aluminum is more than 50 μm, the graphene is completely embedded in aluminum to form a thermal conductivity path between particles. Can not.

The graphene may be a component for improving thermal conductivity.

The graphene may be prepared using graphene having a size of 5 to 10 μm and a thickness of 3 to 10 nm.

Specifically, graphene may be prepared by using a mixture of thin graphene having a thickness of 4 to 5 nm and thick graphene having a thickness of 10 nm. When thin graphene and thick graphene are used together, thin graphene has great flexibility to form a thermal link, and thick graphene has less deterioration due to phonon boundary scattering, so thermal conductivity can be further increased. have.

When the size of the graphene is less than 5 μm, phonon scattering may increase, and when the size of graphene is more than 10 μm, the aggregation of graphene may increase.

When the thickness of the graphene is less than 3 nm, aggregation may occur, and when the thickness of the graphene is more than 10 nm, the aspect ratio decreases, so that the increase rate of thermal conductivity may decrease.

The graphene-aluminum hybrid particles may have a particle size of 10 μm to 200 μm. When the particle size of the graphene-aluminum hybrid particle is less than 10 μm, interfacial thermal resistance may be increased by forming many thermal resistance junctions, and when the particle size of the graphene-aluminum hybrid particle is more than 200 μm, the filament composition Since the internal particles are not evenly dispersed, the mechanical properties of the filament may be weakened, and problems such as clogging of the nozzle may occur when printing to a 3D printer.

On the other hand, the filament composition for the 3D printer is to prepare a thermoplastic elastomer (thermo plastic elastomer, TPE); Preparing nanocarbon-metal hybrid particles; And mixing the thermoplastic elastomer (thermo plastic elastomer, TPE) and nano-carbon-metal hybrid particles; may be prepared including.

1 is a flowchart of a method for manufacturing a filament composition for a 3D printer according to an embodiment of the present invention.

Referring to FIG. 1, first, a thermoplastic elastomer (TPE) is prepared (S10).

The thermoplastic elastomer (TPE) is a component that imparts elasticity and flexibility in the filament composition for 3D printers, and is a styrene-based (thermo plastic styrenic block copolymer, SBC), an olefin-based (thermo plastic olefinic elastomer, TPO), It may be one or more selected from the group consisting of urethane-based (thermo plastic polyurethane, TPU), amide-based (thermo plastic polyamide, TPAE), and polyester-based (thermo plastic polyester elastomer, TPEE), and specifically, polyester-based thermoplastic elastomer. (thermo plastic polyester elastomer, TPEE)), and more specifically, it may be a thermoplastic polyether ester elastomer.

Next, nano-carbon-metal hybrid particles are prepared (S20).

The nano-carbon-metal hybrid particle is a component for improving insulation and thermal conductivity in the filament composition for a 3D printer, and specifically, the nano-carbon-metal hybrid particle may be a graphene-aluminum hybrid particle.

The graphene-aluminum hybrid particles,

1) preparing graphene;

2) preparing aluminum; And

3) mixing the graphene and aluminum to ball mill; may be prepared including.

First, step 1) prepares graphene.

The graphene is a component for improving thermal conductivity, and may be prepared including an electrochemical peeling method.

The graphene may have a size of 5 to 10 μm and a thickness of 3 to 10 nm.

Specifically, the graphene may be a mixture of thin graphene having a thickness of 4 to 5 nm and thick graphene having a thickness of 10 nm. When thin graphene and thick graphene are used together, thin graphene has great flexibility to form a thermal link, and thick graphene has less deterioration due to phonon boundary scattering, so thermal conductivity can be further increased. have.

When the size of the graphene is less than 5 μm, phonon scattering may increase, and when the size of graphene is more than 10 μm, the aggregation of graphene may increase.

When the thickness of the graphene is less than 3 nm, aggregation may occur, and when the thickness of the graphene is more than 10 nm, the aspect ratio decreases, so that the increase rate of thermal conductivity may decrease.

Step 2) prepares aluminum.

The aluminum is a component for improving insulation and thermal conductivity properties, and may have a particle size of 5 to 50 μm.

On the other hand, the aluminum has excellent thermal conductivity, and since the aluminum has a core-shell structure by forming an oxide film in air, there is an effect of excellent electrical insulation.

Specifically, the aluminum may use aluminum having various particle sizes within a particle size of 5 to 50 μm. When aluminum having various particle sizes within 5 to 50 μm is used, voids between particles are reduced, and thus thermal conductivity is excellent.

When the particle size of the aluminum is less than 5 μm, graphene cannot be surrounded and embedded in the aluminum particles, and when the particle size of aluminum is more than 50 μm, the graphene is completely embedded in aluminum to form a thermal conductivity path between particles. Can not.

Step 3) is a ball mill by mixing the graphene and the aluminum.

The graphene and the aluminum may be mixed in a weight ratio of 1:9 to 3:7, specifically in a weight ratio of 3:7. When the graphene and the aluminum are mixed at the weight ratio, thermal conductivity can be maximized while maintaining insulation.

Before mixing the graphene and the aluminum, the graphene may be subjected to ultrasonic treatment for 0.5 to 2 hours, specifically for 1 hour, and then mixed with aluminum. When the graphene is ultrasonicated for 0.5 to 2 hours, graphene having a thin thickness may be prepared.

The graphene and the aluminum were mixed in a weight ratio of 1:9 to 3:7, specifically a weight ratio of 3:7, and then ball-milled with a stainless ball at 200 to 300 rpm, specifically 250 rpm to form graphene-aluminum particles. Can be manufactured.

The ball milling may be performed for 3 to 7 hours, specifically for 5 hours.

When the graphene and aluminum are ball milled, when the ball milling speed is less than 200 rpm, the graphene and aluminum cannot be hybridized, and when the ball mill speed is more than 300 rpm, the aluminum particle size increases and the graphene particle size is As a result, the thermal conductivity may be lowered.

When the graphene and aluminum are ball milled, when the ball milling time is less than 3 hours, the graphene and aluminum cannot be hybridized, and when the ball milling time is more than 7 hours, the aluminum particle size increases and the graphene particle size May decrease and the thermal conductivity may be lowered.

At this time, the graphene-aluminum particles are made of graphene-aluminum particles in which the graphene and aluminum are mixed and ball milled, aluminum is cold pressed, so that the graphene is enclosed in the aluminum particles and buried.

The prepared graphene-aluminum hybrid particles may have a particle size of 10 μm to 200 μm. When the particle size of the graphene-aluminum hybrid particle is less than 10 μm, interfacial thermal resistance may be increased by forming many thermal resistance junctions, and when the particle size of the graphene-aluminum hybrid particle is more than 200 μm, the filament composition Since the internal particles are not evenly dispersed, the mechanical properties of the filament may be weakened, and problems such as clogging of the nozzle may occur when printing to a 3D printer.

Next, the thermoplastic elastomer (TPE) and nano-carbon-metal hybrid particles are mixed (S30).

The S30 may be a step of preparing a filament composition for a 3D printer by mixing 5 to 20 parts by weight of the nano-carbon-metal hybrid particles with respect to 100 parts by weight of a thermoplastic elastomer (TPE).

Mixing of the thermoplastic elastomer (TPE) and nanocarbon-hybrid particles may be performed in a high-speed mixer.

When the content of the nano-carbon-metal hybrid particles is less than 5, thermal conductivity may be low, and when the content of the nano-carbon-metal hybrid particles is more than 20, electrical insulation cannot be maintained.

Filament and its manufacturing method

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

Referring to Figure 2, the 3D printer filament manufacturing method comprises the steps of preparing a thermoplastic elastomer (TPE); Preparing nanocarbon-metal hybrid particles; Preparing a mixture by mixing the thermoplastic elastomer (TPE) and the nano-carbon-metal hybrid particles; And extruding the mixture to prepare a filament; may include.

First, a thermoplastic elastomer (TPE) is prepared (S100).

The thermoplastic elastomer (TPE) is a component that imparts elasticity and flexibility in the filament composition for 3D printers, and is a styrene-based (thermo plastic styrenic block copolymer, SBC), an olefin-based (thermo plastic olefinic elastomer, TPO), It may be one or more selected from the group consisting of urethane-based (thermo plastic polyurethane, TPU), amide-based (thermo plastic polyamide, TPAE), and polyester-based (thermo plastic polyester elastomer, TPEE), and specifically, polyester-based thermoplastic elastomer. (thermo plastic polyester elastomer, TPEE)), and more specifically, it may be a thermoplastic polyether ester elastomer.

Next, nano-carbon-metal hybrid particles are prepared (S200).

The nano-carbon-metal hybrid particle is a component for improving insulation and thermal conductivity in the filament composition for a 3D printer, and specifically, the nano-carbon-metal hybrid particle may be a graphene-aluminum hybrid particle.

The graphene-aluminum hybrid particles,

1) preparing graphene;

2) preparing aluminum; And

3) mixing the graphene and aluminum to ball mill; may be prepared including.

First, step 1) prepares graphene.

The graphene is a component for improving thermal conductivity, and may be prepared including an electrochemical peeling method.

The graphene may have a size of 5 to 10 μm and a thickness of 3 to 10 nm.

Specifically, the graphene may be a mixture of thin graphene having a thickness of 4 to 5 nm and thick graphene having a thickness of 10 nm. When thin graphene and thick graphene are used together, thin graphene has great flexibility to form a thermal link, and thick graphene has less deterioration due to phonon boundary scattering, so thermal conductivity can be further increased. have.

When the size of the graphene is less than 5 μm, phonon scattering may increase, and when the size of graphene is more than 10 μm, the aggregation of graphene may increase.

When the thickness of the graphene is less than 3 nm, aggregation may occur, and when the thickness of the graphene is more than 10 nm, the aspect ratio decreases, so that the increase rate of thermal conductivity may decrease.

Step 2) prepares aluminum.

The aluminum is a component for improving insulation and thermal conductivity properties, and may have a particle size of 5 to 50 μm.

On the other hand, the aluminum has excellent thermal conductivity, and since the aluminum has a core-shell structure by forming an oxide film in air, there is an effect of excellent electrical insulation.

Specifically, the aluminum may use aluminum having various particle sizes within a particle size of 5 to 50 μm. When aluminum having various particle sizes within 5 to 50 μm is used, voids between particles are reduced, and thus thermal conductivity is excellent.

When the particle size of the aluminum is less than 5 μm, graphene cannot be surrounded and buried, and when the particle size of aluminum is more than 50 μm, graphene is completely buried in aluminum and thus the thermal conductivity path between particles cannot be formed. .

Step 3) is a ball mill by mixing the graphene and the aluminum.

The graphene and the aluminum may be mixed in a weight ratio of 1:9 to 3:7, specifically in a weight ratio of 3:7. When the graphene and the aluminum are mixed at the weight ratio, thermal conductivity can be maximized while maintaining insulation.

Before mixing the graphene and the aluminum, the graphene may be subjected to ultrasonic treatment for 0.5 to 2 hours, specifically for 1 hour, and then mixed with aluminum. When the graphene is ultrasonicated for 0.5 to 2 hours, graphene having a thin thickness may be prepared.

The graphene and the aluminum are mixed in a weight ratio of 1:9 to 3:7, specifically 3:7, and then ball-milled with a stainless ball at 200 to 300 rpm, specifically 250 rpm to form graphene-aluminum particles. Can be manufactured.

The ball milling may be performed for 3 to 7 hours, specifically for 5 hours.

When the graphene and aluminum are ball milled, when the ball milling speed is less than 200 rpm, the graphene and aluminum cannot be hybridized, and when the ball mill speed is more than 300 rpm, the aluminum particle size increases and the graphene particle size is As a result, the thermal conductivity may be lowered.

When the graphene and aluminum are ball milled, when the ball milling time is less than 3 hours, the graphene and aluminum cannot be hybridized, and when the ball milling time is more than 7 hours, the aluminum particle size increases and the graphene particle size May decrease and the thermal conductivity may be lowered.

At this time, when the graphene-aluminum particles are mixed with the graphene and aluminum and ball milled, aluminum is cold-pressed, so that the graphene is enclosed and buried in the aluminum particles to produce graphene-aluminum particles.

The prepared graphene-aluminum hybrid particles may have a particle size of 10 μm to 200 μm. When the particle size of the graphene-aluminum hybrid particle is less than 10 μm, interfacial thermal resistance may be increased by forming many thermal resistance junctions, and when the particle size of the graphene-aluminum hybrid particle is more than 200 μm, the filament composition Since the internal particles are not evenly dispersed, the mechanical properties of the filament may be weakened, and problems such as clogging of the nozzle may occur when printing to a 3D printer.

Next, a mixture is prepared by mixing the thermoplastic elastomer (TPE) and nano-carbon-metal hybrid particles (S300).

The S300 may be a step of preparing a filament composition for a 3D printer by mixing 5 to 20 parts by weight of the nano-carbon-metal hybrid particles with respect to 100 parts by weight of a thermoplastic elastomer (TPE).

Mixing of the thermoplastic elastomer (TPE) and nanocarbon-hybrid particles may be performed in a high-speed mixer.

When the content of the nano-carbon-metal hybrid particles is less than 5, thermal conductivity may be low, and when the content of the nano-carbon-metal hybrid particles is more than 20, electrical insulation cannot be maintained.

Next, the mixture is extruded to prepare a filament (S400).

The S400 may be a step of manufacturing a filament by extruding the mixture prepared in S300, specifically, a filament composition for a 3D printer.

The thermoplastic elastomer (TPE) included in the mixture may be in the form of a pellet.

In an embodiment of the present invention, the extrusion temperature may be higher than or equal to the melting point of the mixture.

The filament is manufactured by an extrusion process of the mixture, and in order for the mixture to be extruded through an extruder, the mixture must be introduced into the nozzle of the extruder in a molten state. Therefore, the extrusion temperature may be higher than the melting point of the mixture.

When extruding the filament composition in the S400, the extruded thermoplastic elastomer and the nano-carbon-metal hybrid particles in the form of pellets are put into an extruder and extruded, and the extruded filament is pelletized again, and the extrusion can be repeated. , Can be specifically repeated 3 times.

In the S400, the extrusion speed may be 600 to 650 mm/min, specifically 650 mm/min, and the extrusion temperature may be 240 to 250 °C, specifically 245 °C.

The diameter of the filament may be 1.0 mm to 3 mm. The filament is a filament used in the FDM-3D printer, and the FDM-3D printer has a smaller diameter of the filament than a general 3D printer, and may be specifically 1.75 mm.

On the other hand, the present invention provides a filament manufactured by the filament manufacturing method for the 3D printer.

The filament is used as a raw material for 3D printers, just as ink is used as a raw material in an inkjet printer.

The filament for the FDM-3D printer is prepared by extruding a filament composition for a 3D printer, and the filament composition for a 3D printer is based on 100 parts by weight of a thermoplastic elastomer (TPE), nanocarbon-metal hybrid particles 5 to 20 It may include parts by weight.

The filament may have a diameter of 1.0 to 3.0 mm, and specifically 1.75 mm.

When the diameter of the filament is less than 1.0 mm, the filament breaks during 3D printing, and when the diameter of the filament exceeds 3.0 nm, the filament cannot be loaded into the 3D printer.

The filament may have a Shore D hardness of 55 to 60. If the filament's Shore D hardness is less than 55, its flexural modulus or flexural strength may be low, so durability may be weak. .

Plate and fabric

According to another aspect of the present invention, the present invention provides a plate made of a 3D printer by extruding a filament composition for a 3D printer to produce a filament, and using the filament.

In addition, the present invention provides a fabric produced by a 3D printer by extruding a filament composition for a 3D printer to produce a filament, and using the filament.

The filament for the 3D printer may include 5 to 20 parts by weight of nano-carbon-metal hybrid particles based on 100 parts by weight of a thermoplastic elastomer (TPE).

Plates and fabrics manufactured using the 3D printer according to the present invention have excellent thermal conductivity and insulation properties, and thus can be applied to temperature control devices and fibers.

Hereinafter, examples will be described in detail to illustrate the present invention in detail. However, the embodiments according to the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. Embodiments of the present invention are provided to more completely describe the present invention to those of ordinary skill in the art.

Example

<Example>

1. Preparation of graphene-aluminum hybrid particles

First, graphene was prepared using an electrochemical peeling method. After arranging graphite as a working electrode and stainless steel as a counter electrode, 0.3M (NH ₄ ) ₂ SO ₄ solution was used as an electrolyte. Each electrode was immersed in the electrolyte and the distance between the electrodes was maintained at 2 cm, and a DC voltage of +10V was applied to the graphite electrode for 30 minutes to peel the graphite, followed by filtering and washing using a vacuum filtration device.

Graphene-aluminum hybrid particles were prepared using ball milling. The prepared graphene was put in ethanol and subjected to ultrasonic treatment for 1 hour, and then aluminum and stainless balls were added to the ethanol containing the graphene. Ball milling was performed at 250 rpm for 5 hours. At this time, the ratio of graphene and aluminum is 1:9, 2:8, and 3:7, respectively, and graphene-aluminum hybrid particles of Al ₉ @Graphene ₁ , Al ₈ @Graphene ₂ , Each of Al ₇ @Graphene ₃ was prepared.

Meanwhile, the Al ₉ , Al ₈ , In Al ₇ 9, 8, 7 means the ratio of aluminum in the graphene-aluminum hybrid particle, Graphene ₁ , Graphene ₂ , In Graphene ₃ , 1, 2, and 3 mean the ratio of graphene in the graphene-aluminum hybrid particle.

2. Preparation of filament composition for 3D printer

Thermoplastic polyether ester elastomer (TPEE, TREL 5550, Samyang) 100 parts by weight, the graphene-aluminum hybrid particles prepared in 1. above (Al ₉ @Graphene ₁ , Al ₈ @Graphene ₂ , Al ₇ @Graphene ₃ ) 5 parts by weight, 10 parts by weight, 15 parts by weight, 20 parts by weight of graphene-aluminum hybrid particles were added to a high-speed mixer, and graphene-aluminum particles were mixed with different contents of Al ₉ @Graphene ₁ / TPEE, Al ₈ @Graphene ₂ /TPEE, Each of Al ₇ @Graphene ₃ /TPEE was prepared.

3. Filament manufacturing

The mixture prepared in 2. above was extruded at 245° C. through a small extruder of a lab scale to prepare filaments having a diameter of 1.75 mm, respectively.

4. Plate and fabric manufacturing

FDM-3D printer (Single plus, Cubicon) was used to prepare a plate and fabric from the filament prepared in 3. above.

Comparative example

<Comparative Example 1>

1. Preparation of filament composition for 3D printer

Prepared aluminum. Al/TPEE was prepared by putting 20 parts by weight of the aluminum particles and 100 parts by weight of a thermoplastic polyester elastomer (TPEE, TREL 5550, Samyang) in a high-speed mixer.

2. Filament manufacturing

The Al/TPEE prepared in <Comparative Example 1> 1. was extruded at 245° C. through a small extruder of a lab scale to prepare a filament having a diameter of 1.75 mm.

3. Plate and fabric manufacturing

Plates and fabrics were prepared in the same manner as in <Example> 4.

<Comparative Example 2>

1. Preparation of graphene and aluminum mixture

Graphene was prepared in the same manner as in <Example> 1. The prepared graphene and aluminum were simply mixed in a ratio of 3:7 to prepare a mixture of Al ₇ +Graphene ₃ .

2. Preparation of filament composition for 3D printer

100 parts by weight of a thermoplastic polyether ester elastomer (TPEE, TREL 5550, Samyang), 20 parts by weight of the graphene and aluminum mixture (Al ₇ +Graphene ₃ ) prepared in <Comparative Example 2> 1. ₇ +Graphene ₃ /TPEE was prepared.

3. Filament manufacturing

The Al ₇ +Graphene ₃ /TPEE prepared in <Comparative Example 2> 2. was extruded at 245° C. through a small extruder of a lab scale to prepare a filament having a diameter of 1.75 mm.

4. Plate and fabric manufacturing

Plates and fabrics were prepared in the same manner as in <Example> 4.

Experimental example

<Experimental Example 1> Measurement of thermal conductivity

The thermal conductivity of the filaments according to Examples and Comparative Examples of the present invention was measured.

Thermal conductivity was measured with a hot disk, TPS 2500s. The results are shown in FIG. 3.

As can be seen in FIG. 3, it was confirmed that the example of the present invention has superior thermal conductivity compared to the comparative example.

<Experimental Example 2> Volume resistance measurement

The volume resistance of the filaments according to Examples and Comparative Examples of the present invention was measured.

Volume resistance was measured by (ASTM D257, Hiresta-UX MCP-HT800, Mitsubishi chemical analysistech Co., Ltd. Table 1 shows the results.

As can be seen in Table 1, in the case of the embodiment of the present invention, by using graphene-aluminum hybrid particles, unlike graphene and aluminum mixture in which graphene and aluminum are simply mixed (Comparative Example 2), electrical insulation is maintained. I could confirm that.

Until now, the filament composition for a 3D printer according to the present invention, a filament using a filament composition, and a specific embodiment of the plate and fabric manufactured using the filament have been described, but various implementations within the limit not departing from the scope of the present invention It is obvious that transformation is possible.

Therefore, the scope of the present invention is limited to the described embodiments and should not be defined, and should be defined by the claims and equivalents as well as the claims to be described later.

That is, it should be understood that the above-described embodiments are illustrative in all respects and not limiting, and the scope of the present invention is indicated by the claims to be described later rather than the detailed description, and the meaning and scope of the claims and All changes or modified forms derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

Claims (13)

Based on 100 parts by weight of thermoplastic elastomer (TPE),
Including 5 to 20 parts by weight of nano-carbon-metal hybrid particles,
The nano-carbon-metal hybrid particles are graphene-aluminum hybrid particles,
The graphene-aluminum hybrid particle is a 3D printer filament composition, characterized in that graphene and aluminum are mixed in a weight ratio of 1:9 to 3:7.
The method of claim 1,
The thermoplastic elastomer is a polyester-based thermoplastic elastomer (TPEE) filament composition for a 3D printer.
delete The method of claim 1,
The nano-carbon-metal hybrid particle is a 3D printer filament composition having a particle size of 10 to 200 μm.
delete The method of claim 1,
The graphene-aluminum hybrid particles are filament compositions for 3D printers that are manufactured using aluminum having a particle size of 5 to 50 μm.
The method of claim 1,
The graphene-aluminum hybrid particles have a size of 5 to 10 μm and a thickness of 3 to 10 nm of graphene is prepared using a 3D printer filament composition.
Preparing a thermoplastic elastomer (TPE);
Preparing nanocarbon-metal hybrid particles;
Preparing a mixture by mixing 5 to 20 parts by weight of the nano-carbon-metal hybrid particles with respect to 100 parts by weight of the thermoplastic elastomer (TPE); And
Including; extruding the mixture to produce a filament
The nano-carbon-metal hybrid particles are graphene-aluminum hybrid particles,
The graphene-aluminum hybrid particle is a method of manufacturing a filament for a 3D printer, characterized in that graphene and aluminum are mixed in a weight ratio of 1:9 to 3:7.
Prepared by extruding the filament composition for 3D printer
The filament composition for a 3D printer includes 5 to 20 parts by weight of nano-carbon-metal hybrid particles, based on 100 parts by weight of a thermoplastic elastomer (TPE),
The nano-carbon-metal hybrid particles are graphene-aluminum hybrid particles,
The graphene-aluminum hybrid particle is a 3D printer filament, characterized in that graphene and aluminum are mixed in a weight ratio of 1:9 to 3:7.
The method of claim 9,
The filament is a 3D printer filament having a diameter of 1.0 to 3.0 mm.
The method of claim 9,
The filament is a 3D printer filament that has a Shore D hardness of 55 to 60.
Including 5 to 20 parts by weight of nano-carbon-metal hybrid particles, based on 100 parts by weight of a thermoplastic elastomer (TPE),
The nano-carbon-metal hybrid particles are graphene-aluminum hybrid particles,
The graphene-aluminum hybrid particle is a plate made of a 3D printer using a filament, characterized in that graphene and aluminum are mixed in a weight ratio of 1:9 to 3:7.
Including 5 to 20 parts by weight of nano-carbon-metal hybrid particles, based on 100 parts by weight of a thermoplastic elastomer (TPE),
The nano-carbon-metal hybrid particles are graphene-aluminum hybrid particles,
The graphene-aluminum hybrid particle is a fabric manufactured by a 3D printer using a filament, characterized in that graphene and aluminum are mixed in a weight ratio of 1:9 to 3:7.

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