KR102450377B1 - Multi-purpose mattress including graphene composite molded body - Google Patents

Abstract

It relates to a multi-purpose mattress including a graphene composite molded body, and more specifically, the graphene composite molded body includes graphene dispersed in a polymer resin, and the graphene composite molded body is a filtering process for discharging foreign substances to the outside. Because it is manufactured, it is characterized in that it has excellent antibacterial, antibacterial, deodorizing rate for harmful gas, antistatic, far-infrared emission, UV blocking rate, tensile strength and elongation characteristics.

Description

Multipurpose mattress including graphene composite molded body {MULTI-PURPOSE MATTRESS INCLUDING GRAPHENE COMPOSITE MOLDED BODY}

The present invention relates to a multi-purpose mattress including a graphene composite molded body, and more particularly, the graphene composite molded body includes graphene dispersed in a polymer resin, and the graphene composite molded body is a filtering that discharges foreign substances to the outside. Because it is manufactured through a process, a multi-purpose mattress including it is characterized by having excellent antibacterial, sterilizing, deodorizing rate for harmful gas, antistatic, far-infrared emission, UV blocking rate, tensile strength and elongation characteristics.

Polymers are easy to mold, have excellent chemical resistance, and are light, so they are applied in various fields such as automobile parts, electrical and electronic parts, building materials and packaging materials. However, due to the basic characteristics of insulating properties, problems may occur due to discharge, suction, and repulsion after static electricity generated by friction or the like is generated. Dispersion or radiation characteristics of static electricity that removes or neutralizes static electricity generated are required. In this regard, an ESD (electrostatic discharge) polymer is an electrically conductive polymer material having electrostatic radiation properties while maintaining basic properties as a polymer by various methods. The ESD polymer has a surface resistance of about 10 ^4-10 Ω/sq and has a static dissipation property that radiates static electricity generated during friction.

Regarding the method of using the conductive filler, carbon black and carbon fiber are the most widely used among the conductive fillers, but there is a problem in that they are not satisfactory in terms of performance. Recently, carbon nanotube materials have been spotlighted as fillers in terms of conductivity performance, but there are difficulties in dispersion technology, and even if dispersed, carbon nanotube particles have a strong tendency to agglomerate with each other. There are problems in that it is very difficult to maintain acidity and the performance of electrostatic properties is not sufficiently expressed due to lack of adhesion between the matrix resin and the carbon nanotubes.

In order to solve this problem, many papers and patents on chemical transformation and dispersion of carbon nanotubes have been published or published so far. For the dispersion of carbon nanotubes, not only research papers stating that the dispersion can be simply increased for physical treatment, but also methods for preparing carbon nanotube dispersions using ultrasonication and surfactants have been suggested, but only one step is sufficient to disperse It did not work, and the dispersion stability was also exposed. In particular, in these methods, when other additives are added, the dispersion system is disturbed and the carbon nanotubes tend to agglomerate with each other, and these methods do not exhibit uniform dispersibility when mixed with the resin, thereby reducing electrical and physical properties. have a problem

On the other hand, recently, interest in using graphene, which exhibits 13 times less resistivity and 100 times higher sieve resistance than carbon nanotubes, has increased. Graphene is in the spotlight as a new conductive filler due to the above characteristics. However, the graphene also exhibits a problem of low solubility and dispersibility due to the strong van der Waals force and π-π interaction in the plate-like structure made of pure carbon.

Therefore, while the present inventors were studying to solve the above problems, graphene and a polymer resin were mixed, extruded, and then a filtering process of discharging foreign substances contained therein was performed to obtain a graphene composite molded body. In the case of manufacturing, graphene is stably dispersed in a polymer resin, and it has been found that a mattress including the same can have excellent properties, thereby completing the present invention.

In this regard, Korean Patent Registration No. 10-1406597 discloses a method for manufacturing a graphene-polymer resin composite powder and fiber.

The present invention has been devised to solve the problems of the prior art, and an object of the present invention is to provide a multi-purpose mattress including a graphene composite molded body having a three-dimensional structure.

Another object of the present invention is to provide a method for manufacturing the graphene composite molded body.

As a technical means for achieving the above-described technical problem, one aspect of the present invention is,

As a multi-purpose mattress including a graphene composite molded body having a three-dimensional structure formed to have elasticity, the graphene composite molded body provides a multi-purpose mattress comprising graphene and a polymer resin.

The graphene composite molded body having the three-dimensional structure may have a network type, a cross-link type, a radial type, a net type, or a branch type.

The graphene may include a material selected from the group consisting of multilayer nanographene, nanographene plate-shaped powder, nanographene ribbon, functional graphene, graphene oxide, and combinations thereof.

The polymer resin is polyethylene (polyethylene, PE), polyvinyl chloride (PVC), polyethylene terephthalate (PET), polyolefin elastomer (POE), polypropylene (polypropylene, PP), Polyamide (PA), polycarbonate (PC), polybutylene terephthalate (PBT), ABS resin (acrylonitrile butadiene styrene copolymer), polyacetal (polyacetal), polyoxymethylene (POM) ), polyetherimide, polyurethane (PU), and a polymer resin selected from the group consisting of combinations thereof.

The content of the graphene may be 0.001 parts by weight to 5 parts by weight based on 100 parts by weight of the polymer resin.

The multi-purpose mattress may have a triboelectricity of 250 V or less with respect to the cotton fabric measured by KS K 0555 (2015, method B).

The multi-purpose mattress may have a triboelectricity of 100 V or less for the blanket measured by KS K 0555 (2015, method B).

The multi-purpose mattress may have a bacteriostatic reduction rate of 80% or more after 18 hours for Staphylococcus aureus or klebsiella pneumoniae, respectively.

The multi-purpose mattress may further include an outer shell surrounding the outer surface of the graphene composite molded body.

In addition, another aspect of the present invention,

A method of manufacturing the graphene composite molded body, comprising: mixing graphene and a polymer resin; extruding the mixture; and filtering the foreign substances contained in the extruded mixture by discharging to the outside.

The extrusion may be performed using an extruder using a screw.

The filtering may be performed using a filter installed on the outer circumferential surface of the screw and having a fine passage through which foreign substances pass.

The foreign material may include a material selected from the group consisting of gas, water vapor, low molecular weight chemicals, and combinations thereof.

In addition, another aspect of the present invention,

As the manufacturing method of the multi-purpose mattress, the step of extruding the graphene composite molded body using an extrusion head; transforming the extruded graphene composite molded body into a spring shape; and cutting the modified graphene composite molded body; provides a method for manufacturing a multi-purpose mattress comprising a.

The extrusion head includes a raw material input unit into which the graphene composite molded body is input; and an extrudate discharging unit through which the extruded graphene composite molded body is discharged, wherein the extruded discharging unit may include a tube and a vertically movable mandrel pin installed on the upper portion of the tube.

As described above, in the graphene composite molded article according to the present invention, foreign substances such as gas, water vapor, and low molecular chemical substances contained in graphene and molten polymer resin are removed, so that graphene and polymer resin are interfacing without adding a compatibilizer or coupling agent. Since they are not separated from each other, they have excellent mechanical properties.

In addition, since the graphene composite molded article as described above has excellent antibacterial, bactericidal, deodorizing rate for harmful gas, antistatic, far-infrared emission, tensile strength and elongation characteristics, it may have very excellent efficacy when used in a mattress.

1 is a photograph showing a mattress manufactured according to an embodiment of the present invention.
Figure 2 is a schematic diagram showing a mattress including a shell according to an embodiment of the present invention.
3 is a flowchart illustrating a method of manufacturing a graphene composite molded body according to an embodiment of the present invention.
4 is a schematic view showing an apparatus for manufacturing a graphene composite molded body according to an embodiment of the present invention.
5 is a schematic view showing a cross section of a hole plate according to an embodiment of the present invention.
6 is a schematic view showing a cross-section of a cutting part according to an embodiment of the present invention.
7 is a schematic diagram showing a mattress manufacturing process according to an embodiment of the present invention.
8A and 8B are schematic views showing an extrusion head according to an embodiment of the present invention, respectively.
9a to 9c are schematic views showing an extrudate discharging unit according to an embodiment of the present invention, respectively.
10 and 11 are schematic views each showing a deformation process of an extrudate according to an embodiment of the present invention.
12 and 13 are photographs showing the antibacterial performance of the graphene composite molded body according to an experimental example of the present invention, respectively.
14 is a graph showing the deodorization rate of the graphene composite molded body according to an experimental example of the present invention.
15 is a photograph showing the antifungal performance of the graphene composite molded body according to an experimental example of the present invention.

Hereinafter, the present invention will be described in more detail. However, the present invention may be embodied in various different forms, and the present invention is not limited by the embodiments described herein, and the present invention is only defined by the claims to be described later.

In addition, the terms used in the present invention are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the entire specification of the present invention, 'including' any component means that other components may be further included, rather than excluding other components, unless otherwise stated.

The first aspect of the present application is

As a multi-purpose mattress including a graphene composite molded body 1 having a three-dimensional structure formed to have elasticity, the graphene composite molded body 1 provides a multi-purpose mattress comprising graphene and a polymer resin.

Hereinafter, a multi-purpose mattress according to the first aspect of the present application will be described in detail with reference to FIGS. 1 and 2 .

In one embodiment of the present application, the multi-purpose mattress may include a graphene composite molded body 1 having a three-dimensional structure formed to have elasticity. In this case, as shown in FIG. 1 , the graphene composite molded body 1 may be formed as one or a plurality of filaments, and the filaments may be entangled to form a three-dimensional structure. In this case, the graphene composite molded body 1 having the three-dimensional structure may have a network-type, cross-linked, radial, net or branched shape, and preferably exhibits excellent elasticity by having a network-like shape. can On the other hand, the graphene composite molded body 1 having the three-dimensional structure may be a molded body in the form of a three-dimensional structure by melting the graphene composite molded body prepared according to the second and third aspects of the present application, which will be described later. have. That is, the graphene composite molded body is primarily a mixture of graphene and a polymer resin, and may be obtained in a form cooled after melting or in a pellet form, and a three-dimensional structure by reprocessing the obtained graphene composite molded body as described above. It may be molded into On the other hand, the specific manufacturing method of the graphene composite molded body will be described in more detail in the second and third aspects of the present application below.

In one embodiment of the present application, the multi-purpose mattress includes the graphene composite molded body 1 having a three-dimensional structure formed to have the same elasticity as described above, so that it is light and has excellent elasticity and restoring force, and cushioning or comfort is maximized. it could be In addition, it is possible to prevent the propagation of bacteria such as mold due to very good air permeability, and may be easily washed and dried. In this case, the mattress may be preferably used as a bed mattress or a sheet interior material such as a car or an airplane, but is not limited thereto, and in general, if the mattress can be applied, there may be no limitation in its use.

In one embodiment of the present application, the graphene composite molded body 1 having the three-dimensional structure may include graphene and a polymer resin, and more specifically, include graphene in a dispersed form in the polymer resin. can In this case, the graphene may include a material selected from the group consisting of multilayer nanographene, nanographene plate-like powder, nanographene ribbon, functional graphene, graphene oxide, and combinations thereof. In addition, the polymer resin is polyethylene (poly ethylene, PE), polyvinyl chloride (PVC), polyethylene terephthalate (polyethylene terephthalate, PET), polyolefin elastomer (polyolefin elastomer, POE), polypropylene (polypropylene, PP) ), polyamide (PA), polycarbonate (PC), polybutylene terephthalate (PBT), ABS resin (acrylonitrile butadiene styrene copolymer), polyacetal (polyacetal), polyoxymethylene , POM), polyetherimide (polyetherimide), polyurethane (polyurethane, PU), and may include a polymer resin selected from the group consisting of combinations thereof.

In one embodiment of the present application, the content of the graphene may be 0.001 parts by weight to 5 parts by weight based on 100 parts by weight of the polymer resin, preferably 0.005 parts by weight to 1 parts by weight, more preferably 0.01 parts by weight to 0.1 parts by weight. At this time, when the content of the graphene is less than 0.001 parts by weight compared to 100 parts by weight of the polymer resin, the graphene content is too small, and the graphene composite molded body or multi-purpose mattress including the same may not have excellent characteristics inherent in graphene, When it exceeds 5 parts by weight, the content of the polymer resin may be relatively small, and the dispersion stability of graphene dispersed in the polymer resin may be reduced. According to an embodiment of the present application, the weight mixing ratio of the mixed graphene and the polymer resin may be about 0.05: 99.95.

In one embodiment of the present application, the multi-purpose mattress may have a triboelectricity of 250 V or less for the cotton fabric measured by KS K 0555 (2015, method B), and by KS K 0555 (2015, method B) The measured triboelectricity with respect to the blanket may be 100 V or less. In addition, according to an embodiment of the present application, the multi-purpose mattress may have a triboelectric electrification of about 200 V for the cotton fabric measured by KS K 0555 (2015, method B), and in KS K 0555 (2015, method B). It may be that the triboelectricity for the blanket measured by the method is about 76 V. That is, as described above, the multi-purpose mattress may exhibit low triboelectricity by including the graphene composite molded body 1, and thus may exhibit an excellent antistatic effect.

In one embodiment of the present application, the multi-purpose mattress may have a bacteriostatic reduction rate of 99% or more, preferably about 99.9%, after 18 hours for Staphylococcus aureus or klebsiella pneumoniae. it could be This may be because the multi-purpose mattress includes the graphene composite molded body 1, so it may exhibit an excellent antibacterial effect, and accordingly, it is possible to prevent the growth of bacteria harmful to the human body, so that it is possible for the user to provide a cleaner mattress. can

In one embodiment of the present application, the multi-purpose mattress may further include an outer shell 5 surrounding the outer surface of the graphene composite molded body 1 . In this case, the shell 5 may be a part in direct contact with the user's skin, using a known shell 5 made of a soft material. Meanwhile, the surface of the outer shell 5 may be surface-treated with an antibacterial agent, and the antibacterial agent may contain, for example, titanium powder, aluminum powder or silver powder. In addition, macrolide-based, aminoglycoside-based, cephem-based, penicillin-based, chitosan-based, chitin-based, hyaluronic acid-based, alginic acid-based, carrageenan-based, xanthan-based, gellan-based, amino acid-based or protein-based natural antibacterial agents, quinolones , sulfonamide, diimidine, bisphenol, guanidine, biguanide, imidazolium, hexidine, sulfanilic acid, salicylic acid, aminobenzoic acid, hydantoin or imidazolidinone. At least one of a synthetic antibacterial agent, an antifungal agent and an antiviral agent may be contained.

The second aspect of the present application is

As a method for manufacturing a graphene composite molded body according to the first aspect of the present application, the method comprising: mixing graphene and a polymer resin; extruding the mixture; and filtering the foreign substances contained in the extruded mixture by discharging to the outside.

The third aspect of the present application is

a hopper 10 for accommodating a mixture of graphene and polymer resin; an extruder connected to the hopper 10 and using a screw 30 for extruding a mixture of graphene and polymer resin accommodated in the hopper 10; and a filter 50 installed at the distal end of the extruder, wherein the filter 50 is installed on the outer circumferential surface of the screw 30, and a fine passage through which foreign substances pass is formed. manufacturing equipment is provided.

Hereinafter, a method for manufacturing a graphene composite molded body according to the second aspect of the present application and an apparatus for manufacturing a graphene composite molded body according to the third aspect of the present application will be described in detail with reference to FIGS. 3 to 6 . At this time, FIG. 3 is a flowchart showing a method of manufacturing the graphene composite molded body, and FIGS. 4 to 6 are schematic views showing an apparatus for manufacturing the graphene composite molded body. The method of manufacturing a graphene composite molded body according to the second aspect of the present application is It may be manufactured using the apparatus for manufacturing a graphene composite molded body according to the third aspect of the present application. On the other hand, since the manufacturing apparatus of the graphene composite molded body shown in FIGS. 4 to 6 is only one embodiment, it is understood that some forms of deformation or substitution of components are included within the scope that does not impair the scope of the present invention. should be In addition, in the present specification, "graphene composite molded body" may mean a mixture of graphene and polymer resin after filtering to be described later, and may mean a mixture molded in the form of pellets, which is a subsequent step. On the other hand, the “three-dimensional graphene composite molded body” according to the first aspect of the present application may refer to a molded body formed into a three-dimensional structure by melting the “graphene composite molded body”.

First, in one embodiment of the present application, the method of manufacturing the graphene composite molded body may include a step of mixing graphene and a polymer resin.

In one embodiment of the present application, the form of the graphene may be liquid graphene or graphene in powder form, and the types include multilayer nanographene, nanographene plate-like powder, nanographene ribbon, and functional graphene. It may include a material selected from the group consisting of fin, graphene oxide, and combinations thereof. In addition, the graphene may be nano graphene formed in a nano size, and thus the size of the graphene may be less than 1 μm. In this case, the graphene may preferably be a liquid graphene using multi-layered nano graphene or graphene oxide, and the multi-layered nano graphene may have the form of 1 to 5 layers as a two-dimensional structure. On the other hand, when the graphene is liquid graphene, a liquid additive may be mixed with the graphene raw material, and the liquid additive may use a conventional additive without limitation as long as it can dissolve graphene smoothly.

In one embodiment of the present application, the polymer resin is polyethylene (polyethylene, PE), polyvinyl chloride (PVC), polyethylene terephthalate (PET), polyolefin elastomer (POE), Polypropylene (PP), polyamide (PA), polycarbonate (PC), polybutylene terephthalate (PBT), ABS resin (acrylonitrile butadiene styrene copolymer), polyacetal , polyoxymethylene (POM), polyetherimide (polyetherimide), polyurethane (polyurethane, PU), and may include a polymer resin selected from the group consisting of combinations thereof, preferably the polymer resin is Polyethylene (PE), polyvinyl chloride (PVC), polyethylene terephthalate (PET), polyolefin elastomer (POE), polypropylene (PP) or polyamide (polyamide) , PA). On the other hand, the mixing of the graphene and the polymer resin may be performed by impregnating or coating the graphene in the polymer resin, and the content of the mixed graphene is 0.001 parts by weight to 5 parts by weight based on 100 parts by weight of the polymer resin. It may be one, preferably 0.005 parts by weight to 1 parts by weight, more preferably 0.01 parts by weight to 0.1 parts by weight. At this time, when the content of the mixed graphene is less than 0.001 parts by weight relative to 100 parts by weight of the polymer resin, the graphene composite molded article prepared because the content of graphene is too small may not have excellent characteristics inherent in graphene, When the amount is exceeded, the content of the polymer resin is relatively small, so that there may be a problem that the graphene is not smoothly dispersed in the polymer resin.

In one embodiment of the present application, the mixing of the graphene and the polymer resin comprises the steps of preparing a liquid graphene oxide by mixing the graphene oxide with a liquid additive; mixing the polymer resin into the liquid graphene oxide; and drying the mixture. In this case, the drying may be performed at a temperature of about 80 °C to 120 °C. That is, the mixture of graphene and polymer resin mixed as described above may have a moisture content of about 15 wt% or less because the drying step is performed. Extrusion may not be performed smoothly.

In one embodiment of the present application, the mixture of graphene and polymer resin mixed as described above may be accommodated in the hopper 10 as shown in FIG. 4 , and the mixture accommodated in the hopper 10 is then transferred to an extruder It may be conveyed to perform extrusion.

Next, in one embodiment of the present application, the method for producing the graphene composite molded body comprises the steps of extruding the mixture; and filtering the foreign substances contained in the extruded mixture by discharging to the outside.

In one embodiment of the present application, referring to FIG. 4 , the extrusion may be preferably performed using an extruder using a screw 30 . At this time, the upper part of one side of the extruder may be connected to the lower surface of the hopper 10 for accommodating the mixture, and the mixture supplied from the hopper 10 is transferred into one side of the extruder and extruded in the other direction of the extruder. it may be On the other hand, in addition to the mixture of the graphene and the polymer resin, the extruder may be additionally supplied with a base polymer, auxiliary materials, additives, and the like to be extruded together. To this end, the base polymer accommodating hopper 12, the auxiliary material accommodating hopper 14 and the additive accommodating hopper 16 may be additionally installed so that each raw material can be supplied along the extrusion direction of the extruder. In this regard, the base polymer accommodating hopper 12 is connected to the graphene and polymer resin accommodating hopper 10, and accordingly, the mixture of graphene and polymer resin and the base polymer are mixed together into the extruder. it could be

In one embodiment of the present application, the base polymer and the auxiliary material may be selected and supplied with an appropriate material to satisfy the physical properties of the product to be manufactured. In addition, the additive may include a reinforcing agent, a filler, and the like, and may include, for example, glass fiber (GF) or carbon fiber (CF). That is, the base polymer, auxiliary materials and additives may be added in a small amount to satisfy the physical properties of the graphene composite molded body to be manufactured, and the type or content of the added material is appropriately selected and added for the physical properties to be achieved. it could be

In one embodiment of the present application, the extruder includes a body 20 having a passage through which a mixture of graphene and polymer resin moves therein; a screw 30 accommodated in the internal mixture moving passage of the body 20 and extruding the mixture into the hole plate 80 and the cutting part 90 while mixing and melting the mixture supplied from the hopper 10; a heater 40 installed on the outer circumferential surface of the body 20 to heat and melt the mixture; a filter 50 for discharging foreign substances generated from the mixture melted by the heater 40 to the outside; and a head 70 positioned at an end of the body 20 . On the other hand, the foreign material may include a material selected from the group consisting of gas, water vapor, low molecular weight chemicals, and combinations thereof, and the physical properties or properties of the graphene composite molded body manufactured by removing such foreign materials are remarkably excellent. it could be In this case, the low molecular weight chemical substance may be, for example, stearic acid, an oligomer, a trigomer, etc., and such substances are harmful to the human body, and the graphene composite manufactured by removing it The molded body may be harmless to the human body.

In one embodiment of the present application, to describe the filter 50 in more detail, the filter 50 is a plurality of donut-shaped vent rings 52 stacked in the axial direction of the screw 30 . As a structure, between the adjacent vent ring 52 and the vent ring 52 may be one in which a foreign material passes and a fine passage through which the molten mixture does not pass is formed radially. Therefore, the molten mixture moves in the direction of the head 70 along the movement passage by the rotation of the screw 30, and the foreign material passes through the micro passage and is collected in the gas collection space 51, and then the first and second discharge pipes It may be discharged to the outside by the vacuum pump 62 via (60, 61). In this case, it may be preferable to connect a pipe through which external air is introduced in the middle of the first and second discharge pipes 60 and 61 so that foreign substances discharged from the filter 50 are discharged more rapidly. To this end, one end of the air suction pipe 63 through which external air is introduced is connected in the middle of the first and second discharge pipes 60 and 61, and an air filter 64 is installed at the other end of the air suction pipe 63 to install external air. It blocks the inhalation of foreign substances, and the second discharge pipe 61 and the air suction pipe 63 may be arranged in the same straight line and the first discharge pipe 60 may be connected in a right angle direction.

The foreign material discharge system configured as described above forms a negative pressure in the first discharge pipe 60 based on Bernoulli's theorem while external air passes through the air intake pipe 63 and the second discharge pipe 61 at a high speed, so gas The foreign substances collected in the collecting space 51 can be quickly discharged to the outside. In FIG. 4 , a vacuum pump 62 is installed at the downstream end of the second discharge pipe 61 to discharge gas and water vapor, but instead of installing the vacuum pump 62, the air suction pipe 63 is located at the upstream end. It is also possible to install a blower at the (upstream end), and the negative pressure is formed in the first discharge pipe 60 in the same principle as above by the blowing of the blower, so that foreign substances in the gas collection space 51 can be quickly discharged to the outside, , in this case, the blower does not come in direct contact with the foreign material, so there is an advantage in that the blower can be prevented from being corroded by the foreign material. In addition, as another method of rapidly discharging foreign substances, an air inlet 53 may be installed on the outer wall of the filter 50 so that the gas collection space 51 of the filter 50 communicates with external air. The air introduced into the gas collection space 51 through the air inlet 53 passes between the outer peripheral surface of the vent ring 52 constituting the gas collection space 51 and the outer wall of the filter 50 at a high speed to pass the first and second The first discharge pipe 60 ), a negative pressure is formed in the micro passage of the vent ring 52 on the same principle as the negative pressure is formed in the vent ring 52, so that foreign substances generated from the molten mixture can quickly pass through the micro passage and be discharged to the outside. At this time, the first discharge pipe 60 and the air inlet 53 are installed at the farthest position from each other, that is, opposite to each other based on the axial direction and the circumferential direction of the filter 50, so that the entire micro passage of the vent ring 52 is located. It is desirable to create a negative pressure.

Although FIG. 4 shows a single screw extrusion device having one screw 30, it is also possible to use a twin screw extrusion device having two screws 30, and although not shown in FIG. A device for removing organic compounds in foreign substances in accordance with environmental standards may be separately provided.

Next, in one embodiment of the present application, the method for producing the graphene composite compact includes the steps of filtering; Thereafter, the step of molding the mixture in the form of pellets; may further include.

In one embodiment of the present application, the molding may be performed by the hole plate 80 and the cutting unit 90 shown in FIGS. 4 to 6 . In this case, one surface of the hole plate 80 may be attached to the end of the head 70 , and the cutting part 90 may be attached to the other surface of the hole plate 80 . Specifically, the mixture of graphene and polymer resin ejected through the outlet 75 of the head 70 may be in a molten state. Accordingly, the mixture in the molten state as described above may be ejected to the cutting unit 90 through the plurality of holes 85 formed in the hole plate 80 as shown in FIG. 5 . In this case, the cutting unit 90 may include a cutter 92 rotating along a central axis therein, and a cooling water transfer pipe 95 for supplying and discharging cooling water therein is installed on the outer surface. can That is, the mixture ejected through the hole plate 80 may be cut and molded in the form of pellets by the cutter 92, and since the temperature is lowered by the coolant at the same time as cutting, the mixture in the molten state is rapidly It may be hardening.

In one embodiment of the present application, the mixture molded in the form of pellets as described above may be stored in a product (graphene composite molded body) storage hopper (not shown), and may be shipped after molding into a mattress. This will be described in more detail below.

In one embodiment of the present application, the graphene composite molded article prepared as described above can exhibit excellent properties inherent in the raw material because foreign substances such as gas, water vapor, and low molecular weight chemicals are removed, and graphene and polymer resin are interfacing with each other. They are not separated from each other and may be very stable.

In one embodiment of the present application, the graphene composite molded body may have a tensile strength of 57 Mpa to 100 Mpa and an elongation of 165% to 190%, thereby having very excellent mechanical properties. In addition, in addition to the above mechanical properties, it may have excellent antibacterial, bactericidal, antistatic or far-infrared emission characteristics.

The fourth aspect of the present application is

As a method of manufacturing a multi-purpose mattress according to the first aspect of the present application, the step of extruding the graphene composite molded body using an extrusion head (200); transforming the extruded graphene composite molded body into a spring shape; and cutting the modified graphene composite molded body; provides a method for manufacturing a multi-purpose mattress comprising a.

Hereinafter, a method of manufacturing a multi-purpose mattress according to the fourth aspect of the present application will be described in detail with reference to FIGS. 7 to 11 . At this time, FIG. 7 is a schematic diagram showing the mattress manufacturing process, FIG. 8 is a schematic diagram showing an extrusion head, FIG. 9 is a schematic diagram showing an extrudate discharging part, and FIGS. 10 and 11 are schematic diagrams showing the deformation process of the extrudate, respectively. On the other hand, since each drawing shown in FIGS. 7 to 11 is only one embodiment, it should be understood that some form of modification or substitution of components is included within a range that does not impair the scope of the present invention. In addition, it should be understood that the graphene composite molded body that has undergone the cutting step is a multi-purpose mattress.

First, in one embodiment of the present application, the method for manufacturing the multi-purpose mattress may include a step of extruding the graphene composite molded body using the extrusion head 200 .

In one embodiment of the present application, referring to FIG. 7 , the graphene composite molded body is stored in the raw material input loader 100 before being input to the extrusion head 200 , and then moved to the raw material input hopper 150 . , which may be supplied to the extrusion head 200 . At this time, referring to FIGS. 8A and 8B , the extrusion head 200 includes a raw material input unit 210 into which the graphene composite molded body is input; and an extrudate discharge unit 220 through which the extruded graphene composite molded body is discharged. On the other hand, the raw material input unit 210 may be formed on one side of the extrusion head 200, is formed in the form of a hole (hole) is a graphene composite molded body through the hole into the extrusion head (200) may be input. In addition, the graphene composite molded body injected into the extrusion head 200 is subjected to an extrusion process, and then the extruded graphene composite molded body is discharged to the outside of the extrusion head 200 through the extrudate discharge unit 220 it could be

In one embodiment of the present application, referring to FIGS. 9A to 9C , the extrudate discharge unit 220 includes a tube 240 and a vertically movable mandrel pin 230 installed on the upper portion of the tube 240 . may include. In this case, the tube 240 and the mandrel pin 230 may be formed in plurality, and the mandrel pin 230 may be inserted into the upper portion of the tube 240 . On the other hand, the cross section of the tube 240 may have various mold structures such as square, rectangular, circular, hexagonal, octagonal, and the like, and the overall appearance of the tube 240 is a solid type (Fig. It may be installed in the form of a tube type forming a tube (FIG. 9b) or a tube partition wall type having a partition wall formed inside the tube (FIG. 9c). At this time, when the tube partition wall type is employed, the introduction of bacteria and contamination into the tube 240 may be prevented, and the tube 240 has an outer diameter of about 1 mm to 3 mm, and an inner diameter of about 1 mm to 2 It may be formed in mm. In this case, the inner diameter may be adjustable in units of 0.1 mm. On the other hand, the extrudate discharge unit 220 may preferably have a production capacity of discharging about 150 kg of the graphene composite molded body per hour, and for this, the tube 240 and the mandrel pin 230 The number of may be appropriately adjusted.

Next, in one embodiment of the present application, the method for manufacturing the multi-purpose mattress may include: transforming the extruded graphene composite molded body into a spring shape.

In one embodiment of the present application, referring to FIG. 10A , the deformation of the graphene composite molded body into a spring shape may be performed using the heater rod 250 . Specifically, by providing a temperature difference by installing two heater rods 250 having different temperatures in the tube 240 of the extrudate discharge unit 220, the graphene composite molded body discharged may be transformed into a coil spring shape. . In addition, referring to FIG. 10B in addition to the above method, the transformation of the graphene composite molded body into a spring shape may be performed using a hot air blower 260 and a cold blower 265 . In this case, the graphene composite formed body discharged by giving a temperature difference by simultaneously supplying the hot air discharged from the hot air blower 260 and the cold air discharged from the cooling fan 265 to the discharged graphene composite formed body may be to transform the discharged graphene composite shaped body into a coil spring shape. have. Meanwhile, referring to FIGS. 11A to 11C , the transformation of the graphene composite molded body into a spring shape may be performed using a roller 270 and an interface between air and water. In this case, the discharged graphene composite molded body may be supplied between two adjacent rollers 270, at this time, an air atmosphere is formed in the upper part, and a water atmosphere is formed in the lower part, and water is supplied through the interface between air and water. Twist may occur in the graphene composite molded body to be used. That is, the graphene composite molded body in which the twist is generated as described above may be heat-sealable with an interior spring structure.

Next, in one embodiment of the present application, the manufacturing method of the multi-purpose mattress comprises the steps of drying or cooling the modified graphene composite molded body; and planarizing.

In one embodiment of the present application, referring to FIG. 7 , the drying or cooling may be performed in the drying unit 300 or the cooling unit 300, respectively, and the graphene composite molded body is transformed into a spring shape. Depending on the process used, the drying or cooling process may be selectively performed. That is, when the transformation into the spring form is performed using the roller 270 and the interface between air and water, a drying process may be performed to remove the water soaked in the graphene composite compact, and the heater rod 250 ) or when the deformation is performed using hot/cold air, the cooling process may be performed.

Next, in one embodiment of the present application, the method for manufacturing the multi-purpose mattress includes cutting the modified graphene composite molded body.

In one embodiment of the present application, referring to FIG. 7 , the cutting may be performed by the first cutting unit 500 and the second cutting unit 600 , and in the cutting units 500 and 600 , each vertical A cutting process and a horizontal cutting process may be performed. In this case, the order of the vertical cutting process and the horizontal cutting process is not particularly limited, and the vertical and horizontal cutting processes may be simultaneously performed in one cutting unit.

Next, in one embodiment of the present application, the manufacturing method of the multi-purpose mattress comprises the steps of transferring the cut graphene composite molded body; and loading.

In one embodiment of the present application, referring to FIG. 7 , the graphene composite molded body (multipurpose mattress) that has undergone the cutting process may be transported to the loading unit 800 through the conveying unit 700 to be tray-loaded. After that, the graphene composite molded body (multipurpose mattress) loaded on the tray may be moved to the material loading device.

Hereinafter, embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily carry out the present invention. However, the present invention may be embodied in several different forms and is not limited to the embodiments described herein.

Example One. graphene complex molded body Produce ( graphene 0.05 wt% / PET 99.95 wt% )

In order to prepare a graphene composite molded body using the manufacturing method of FIG. 3 and the manufacturing apparatus of FIG. 4, first, multilayered nanographene was mixed with a liquid additive to obtain liquid multilayered nanographene. Thereafter, by mixing polyethylene terephthalate (PET) with the obtained liquid multilayer nanographene, impregnation and coating processes were performed. At this time, the weight mixing ratio of the graphene and PET was 0.05 wt%: 99.95 wt%. Then, after drying the mixture of graphene and PET, it was put into the manufacturing apparatus of FIG. 2 to perform an extrusion process, and the extruded mixture was molded to obtain a graphene composite molded body in the form of pellets.

Example 2. graphene complex molded body Produce ( graphene oxide 0.05 wt% / PET 99.95 wt% )

A graphene composite molded body in the form of pellets was obtained in the same manner as in Example 1, except that nano graphene oxide was used instead of multi-layered nano graphene.

Example 3. graphene complex molded body Produce ( graphene 0.05 wt% / PP 99.95 wt% )

In Example 1, a graphene composite molded body in the form of pellets was obtained using the same method except that a polypropylene (PP) melt-blown nonwoven fabric (60 g/m ² ) was used instead of PET.

Example 4. graphene complex molded body Produce ( graphene 0.1 wt% / pp 99.9 wt% )

A graphene composite molded body in the form of pellets was obtained in the same manner as in Example 3, except that the weight mixing ratio of graphene and PP was changed to 0.1 wt%: 99.9 wt%.

Experimental example One. triboelectricity evaluation

In order to evaluate the triboelectricity of the graphene composite molded body prepared in Example 1, triboelectricity was measured for scrim and blanket according to KS K 0555 (2015, method B) and shown in Table 1 below, At this time, the test conditions were 20±2℃, 40±2%R.H., 400 r/min.

[Table 1]

As shown in Table 1, it was confirmed that the graphene composite molded article prepared according to an embodiment of the present invention exhibited low triboelectricity, and from this, it was confirmed that it had an excellent antistatic effect.

Experimental example 2. radiant energy evaluation

In order to evaluate the far-infrared emissivity and radiant energy of the graphene composite molded body prepared in Example 1, it was commissioned by the Korea Far Infrared Association, and the experiment was conducted, and the results are shown in Table 2 below. The measurement method was measured based on KFIA-FI-1005, the wavelength was 5 to 20 μm, and the temperature was measured based on 37°C.

[Table 2]

As shown in Table 2, the graphene composite molded body prepared according to an embodiment of the present invention has an emissivity of 0.894 and a radiation energy emission amount of 3.45 x 10 ² W/m ² μm in a wavelength range of 5 to 20 μm. I was able to confirm that I had. Therefore, it was confirmed that the graphene composite molded article had excellent far-infrared emissivity and radiant energy emission.

Experimental example 3. Evaluation of UV protection performance

In order to evaluate the UV blocking performance of the graphene composite molded body prepared in Example 1, UV blocking rates of UV-A (315-400 nm) and UV-B (290-315 nm) based on KS K 0850:2014 and UV protection factor (UPF) were measured, and the results are shown in Table 3 below. At this time, a UV Transmittance Analyzer was used as a test device, and a Xenon Arc was used as a light source.

[Table 3]

As shown in Table 3, it was confirmed that the graphene composite molded article prepared according to an embodiment of the present invention exhibited an excellent UV blocking rate and UV blocking index, and from this, it was confirmed that it had excellent UV blocking performance.

Experimental example 4. Antibacterial performance evaluation

In order to evaluate the antibacterial performance of the graphene composite molded body prepared in Examples 1 and 2, an experiment was conducted based on KS K 0693:2016 by requesting the FITI Test Research Institute, and the results are shown in Table 4 and FIG. Examples 1) and 13 (Example 2) are respectively shown. The strains used at this time were Staphylococcus aureus (Staphylococcus aureus), Klebsiella pneumoniae (Pneumococcus pneumoniae), and 0.05% nonionic surfactant (snogen) was used for the inocula as a nonionic surfactant. An attached white cloth for fastness was used.

[Table 4]

As shown in Table 4 and FIGS. 12 (Example 1) and 13 (Example 2), the graphene composite molded articles prepared in Examples 1 and 2 all showed a high bacteriostatic reduction rate, especially in Example 1 The prepared graphene composite molded article exhibited a bacteriostatic reduction rate of 99.9%, confirming that the antibacterial performance was very good.

Experimental example 5. Deodorization rate evaluation

In order to evaluate the deodorization rate for ammonia and acetic acid of the graphene composite molded body prepared in Example 1 at all times, an experiment was conducted based on FTM-5-2: 2004, the gas detection tube method, and the results are shown in Table 5 below. . At this time, the measurement time was set to after the lapse of 2 hours, and the deodorization rate was calculated using Equation 1 below.

[Equation 1]

Deodorization rate (%) = [(blank concentration)-(sample concentration)/(blank concentration)] × 100

In this case, in Equation 1, the blank concentration is a concentration measured in the absence of a sample, and the sample concentration means a concentration measured in the presence of a graphene composite molded body.

[Table 5]

As shown in Table 5, the graphene composite molded article prepared in Example 1 was confirmed to have excellent deodorization rates of about 20% and 60% for ammonia and acetic acid for 2 hours, respectively.

On the other hand, in order to evaluate the deodorization rate for ammonia of the graphene composite molded body prepared in Example 2, an experiment was conducted based on KFIA-FI-1004 by requesting the KIFA Korea Far Infrared Application Evaluation Institute, and the results are shown in Table 6 and It is shown in Figure 14, respectively.

[Table 6]

As shown in Table 6 and FIG. 14, it was confirmed that the graphene composite molded body prepared in Example 2 had a very good deodorization rate for ammonia.

Experimental example 6. anti-fungal performance evaluation

In order to analyze the antifungal performance of the graphene composite molded body prepared in Examples 3 and 4 at all times, the mold resistance performance analysis (ASTM G-21) was performed at the request of KIFA Korea Far Infrared Application Evaluation Institute, respectively, at the same time as the mold for 4 weeks. The culture was analyzed for the propagation of the fungus. The results are shown in Table 7 and Figure 15, respectively.

[Table 7]

As shown in Table 7 and Figure 15, it was confirmed that there was no growth of mold even when the mold was cultured in the graphene composite molded body prepared in Examples 3 and 4, and thus it was confirmed that it had excellent anti-fungal performance. .

Above, the present invention has been described in detail with preferred embodiments with reference to the drawings, but the scope of the technical idea of the present invention is not limited to these drawings and examples. Accordingly, various modifications or equivalent ranges of embodiments may exist within the scope of the technical spirit of the present invention. Therefore, the scope of the technical idea according to the present invention should be interpreted by the claims, and the technical idea within the equivalent or equivalent scope should be interpreted as belonging to the scope of the present invention.

1: Graphene composite molded body 5: Outer shell
10: hopper for receiving graphene and polymer resin
12: base polymer accommodating hopper 14: sub material accommodating hopper
16: additive receiving hopper 20: body
30: screw 40: heater
50: filter 51: gas collection space
52: vent ring 53: air intake
60: first discharge pipe 61: second discharge pipe
62: vacuum pump 63: air intake pipe
64: air filter 70: head
75: outlet 80: hole plate
85: hole 90: cutting part
92: cutter 95: coolant transfer pipe
100: raw material input loader 150: raw material input hopper
200: extrusion head 210: raw material input unit
220: extrudate discharge unit 230: mandrel pin
240: tube 250: heater rod
260: hot fan 265: cold fan
270: roller 300: drying unit, cooling unit
400: flattening unit 500: first cutting unit
600: second cutting unit 700: transfer unit
800: loading unit

Claims (15)

As a multipurpose mattress comprising a graphene composite molded body of a three-dimensional structure formed to have elasticity,
The graphene composite molded body is to include graphene and a polymer resin,
The graphene composite molded body,
mixing graphene and a polymer resin;
extruding a mixture of the mixed graphene and polymer resin; and
Filtering by discharging foreign substances contained in the extruded mixture to the outside; will be prepared according to the manufacturing method of the graphene composite molded body comprising,
The graphene is multi-layered nano-graphene, nano-graphene plate-shaped powder, nano-graphene ribbon, functional graphene, graphene oxide, and a multi-purpose mattress comprising a material selected from the group consisting of combinations thereof.
According to claim 1,
Graphene composite molded body of the three-dimensional structure is a multi-purpose mattress that has the form of a network, cross-linked, radial, net or branched.
delete According to claim 1,
The polymer resin is polyethylene (polyethylene, PE), polyvinyl chloride (PVC), polyethylene terephthalate (PET), polyolefin elastomer (POE), polypropylene (polypropylene, PP), Polyamide (PA), polycarbonate (PC), polybutylene terephthalate (PBT), ABS resin (acrylonitrile butadiene styrene copolymer), polyacetal (polyacetal), polyoxymethylene (POM) ), polyetherimide (polyetherimide), polyurethane (polyurethane, PU) and a multipurpose mattress comprising a polymer resin selected from the group consisting of combinations thereof.
According to claim 1,
The content of the graphene is a multipurpose mattress that is 0.001 parts by weight to 5 parts by weight relative to 100 parts by weight of the polymer resin.
According to claim 1,
The multi-purpose mattress is a multi-purpose mattress that has a triboelectricity of 250 V or less for the cotton fabric measured by KS K 0555 (2015, method B).
According to claim 1,
The multi-purpose mattress is a multi-purpose mattress that has a triboelectricity of 100 V or less for the blanket measured by KS K 0555 (2015, method B).
According to claim 1,
The multi-purpose mattress is a multi-purpose mattress that has a bacteriostatic reduction rate of 80% or more after 18 hours for Staphylococcus aureus or klebsiella pneumoniae.
According to claim 1,
The multi-purpose mattress is a multi-purpose mattress further comprising an outer skin surrounding the outer surface of the graphene composite molded body.
delete According to claim 1,
The extrusion is a multipurpose mattress that is performed using an extruder using a screw.
12. The method of claim 11,
The filtering is installed on the outer circumferential surface of the screw, multipurpose mattress that is performed using a filter formed with a fine passage through which foreign substances pass.
According to claim 1,
The foreign material is a multipurpose mattress comprising a material selected from the group consisting of gas, water vapor, low molecular weight chemicals, and combinations thereof.
As a method for manufacturing a multipurpose mattress according to claim 1,
extruding the graphene composite molded body using an extrusion head;
transforming the extruded graphene composite molded body into a spring shape; and
cutting the deformed graphene composite compact;
A method of manufacturing a multi-purpose mattress comprising a.
15. The method of claim 14,
The extrusion head includes a raw material input unit into which the graphene composite molded body is input; and
an extrudate discharge unit to which the extruded graphene composite molded body is discharged;
including,
The method of manufacturing a multipurpose mattress that the extrudate discharge unit comprises a tube and a mandrel pin movable up and down installed on the upper part of the tube.

Images