KR102119878B1 - Manufacturing method of marine antifouling and low friction film utilizing fine protuberance and riblet structure - Google Patents

Abstract

The present invention relates to an antifouling low-friction film for ships adopting fine protuberances and a riblet structure, which can save fuel by reducing frictional resistance with the riblet structure while performing eco-friendly and efficient prevention of contamination. In a film wherein a self-lubricating material and an antibacterial substance are added as an auxiliary means to thermoplastic urethane, a kind of thermoplastic elastomer with excellent high tensile strength and abrasion resistance, riblet-type fine protuberances with upper ends curved like shark scales are formed instead of upright protrusions, which are intended to reduce frictional resistance by generating micro vortices but may rather increase the frictional resistance due to friction with the water. The antifouling efficiency is low in a gap between the riblet-type fine protuberances with large protuberances in thickness and height because there is a space for larvae of marine organisms to implant themselves. Thus, in a blank space without riblet-type fine protuberances, ultra-fine protuberances, which are smaller in thickness and height than the riblet-type protuberances, are concurrently formed on the entire surface of the film for physical antifouling.

Description

Antifouling and low friction film for ships using ultrafine protrusions and riblet structure and its manufacturing method{MANUFACTURING METHOD OF MARINE ANTIFOULING AND LOW FRICTION FILM UTILIZING FINE PROTUBERANCE AND RIBLET STRUCTURE}

The present invention relates to an antifouling and low friction film for ships using an ultrafine protrusion and a riblet structure and a method for manufacturing the same, more specifically, applying two types of biomimetic techniques, but first applying the Lotus Effect. The applied ultra-fine protrusions are molded on the film to have anti-fouling function, preventing marine organisms from attaching to the lower hull of the ship, and second, a riblet type similar to the shark scale's riblet structure (形) Anti-fouling and low-friction film for ships with ultra-fine protrusions and riblet structure that can reduce fuel by reducing frictional resistance with water when sailing a ship by simultaneously forming micro-protrusions on a film formed with ultra-fine protrusions. It relates to a manufacturing method.

In general, most of the ships are operated in a state where the lower part of the hull is submerged in water or moored, and some of the offshore structures are installed in a state submerged in water.

In addition, various marine organisms live in the sea, and as time elapses, various marine organisms are attached to a ship or marine structure and inhabit.

Currently, self-polishing Copolymer (SPC) is used to prevent fuel loss and protect the hull by increasing frictional resistance with water when sailing the ship by attaching fish and seaweed, including barnacles, marine organisms, to the hull below the ship's waterline. type) Anti-fouling paint is applied.

However, such self-wearing antifouling paints require environmentally friendly antifouling because harmful chemicals that are peeled off due to wear are harmful to the marine environment.

In addition, a method of painting a low friction antifouling paint on a ship's hull is also used, but this is a method in which the coating surface is lubricated with low friction so that the attachment slips off and the marine organisms attached to the surface of the hull being anchored can be sailed by the ship. At this time, it does not deviate from the low speed, but when it sails at a certain speed or higher, it slips off the hull, resulting in fuel loss when sailing at a low speed of the ship. There are only.

Republic of Korea Patent Publication No. 10-2011-0023607 Republic of Korea Patent Publication No. 10-2014-0076995

The present invention is an ultra-fine protrusion to which the lotus effect, which is a biomimetic technology, is applied to the physical antifouling, and at the same time, it is a hydrodynamically generated micro-vortex with a riblet-type micro-protrusion applied with the riblet structure of a shark scale. Manufactured by adding antibacterial materials as a self-lubricating material and an auxiliary means for antifouling in order to reduce frictional resistance to save fuel and to provide lubricity to the surface of a film made of flexible thermoplastic synthetic resin, thermoplastic elastomer or rubber. To form the riblet-type micro-protrusions in a uniform arrangement on the surface of the film, and to prevent the adhesion of marine organism larvae, which are the size of µm, in the blank space without the riblet-type microprotrusions, a plurality of ultra-fine particles smaller than the riblet-type microprotrusion The purpose of this is to provide an antifouling and low friction film for ships and a method of manufacturing the same, with the application of ultra-fine protrusions and a riblet structure capable of uniformly forming protrusions and applying adhesive to the back of the film to adhere to the hull below the ship's waterline. There is this.

That is, the present invention is applied to the lotus leaf effect to form an ultra-fine protrusion having a smaller size than the larvae of marine organisms on the surface of the film, thereby providing space for the larvae to implant, thereby providing eco-friendly antifouling and shark scales in a physical way. By applying the riblet structure of, it forms a riblet-type micro-protrusion on the surface of the film and simultaneously applies ultra-fine protrusions and riblet structures that can reduce fuel consumption by reducing frictional resistance due to the occurrence of micro-vortices. The purpose is to provide an antifouling and low friction film for a ship and its manufacturing method.

In addition, the present invention has an anti-fouling function by simultaneously forming ultra-fine protrusions and riblet-type fine protrusions on a film in the same mold, preventing marine organisms from adhering to the bottom of the ship's waterline, and reducing frictional resistance with water when sailing the ship. Anti-fouling and low-friction film for ships using ultra-fine protrusions and riblet structures that can reduce the fuel at the same time and implement ultra-fine projections and riblet structures that can attach films to the hull to reduce eco-friendly anti-fouling and hydrodynamic friction resistance. Its purpose is to provide a method of manufacturing.

And as a non-powered ship, manufacturing of anti-fouling and low-friction films for ships using ultra-fine protrusions that can improve anti-fouling function by attaching a film formed only with ultra-fine protrusions to a barge ship or stationary marine structure with a slow ship speed. The purpose is to provide a method.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those skilled in the art from the following description. There will be.

In order to achieve the above object, the antifouling and low friction film for ships to which the ultrafine protrusions and riblet structures of the present invention are applied include a film 100 to which a self-lubricating substance and an antibacterial substance are added to adhere to the hull under the ship's waterline;

On the surface of the film 100, a plurality of upright riblet microprojections 200 protrude on the surface, and the upper end of the upright riblet microprojection 200 is shark scales as shown in FIG. 1 in a subsequent softening process. It is bent in the same direction and transformed into a riblet-shaped structure. Due to the characteristics of flexible and elastic materials, vibration occurs due to friction with water, thereby increasing the antifouling efficiency through unstable conditions and self-cleaning of the hull surface, and turning The micro vortex generated in the gap between the riblets is a riblet-type micro-protrusion 300 that reduces frictional resistance hydrodynamically;

To prevent the larvae of marine organisms from implanting on the surface of the film 100, the ultra-fine protrusions (400, 500) are projected to be smaller in size than the riblet-type fine protrusions 300 in a uniform size and uniform arrangement for antifouling. It characterized in that it comprises ultra-fine projections (400, 500).

And the method of manufacturing the antifouling and low friction film for ships using the ultrafine protrusions and riblet structure of the present invention prevents marine organisms from attaching to the ship's hull, and generates hydrodynamic micro-vortices to reduce frictional resistance during navigation. In order to reduce fuel, a flexible plastic resin, a thermoplastic elastic body, or a rubber, a self-lubricating material and an antimicrobial material are added to the surface of the film 100 to reduce frictional resistance. At the same time, the microprotrusions 200 for the riblets are small in size compared to the microprotrusions 200 for the riblets so as to prevent larvae of marine organisms from implanting in spaces with large gaps between them (400, 500). On the outer circumferential surface of the roll-shaped mold 700, a groove 701 for forming micro-protrusions for riblets is provided at regular intervals for forming the micro-projection 200 for riblets, and the groove 701 for micro-protrusion molding for riblets is formed. Mechanical with a uniform size and uniform arrangement by the roll-shaped mold 700 provided with the ultra-fine protrusion forming groove 702 for forming the ultra-fine protrusions 400 and 500 between the fine protrusion forming grooves 701 for the let The upper protrusion of the erect type riblet 200 is bent in the same direction as the shark scale in the softening process, which is a post-process of molding, by deforming the upper part of the protrusion into a curved riblet type fine protrusion 300 structure. It is characterized in that it simultaneously performs the physical antifouling function by the ultra fine protrusions 400 and 500 and the frictional resistance reduction function by the riblet type fine protrusion 300.

In addition, the present invention is characterized by forming only a very fine protrusion (400, 500) for antifouling on a barge and a stationary offshore structure, where the ship speed is not fast as a non-powered ship.

In addition, the ultra-fine protrusions 400 and 500 for anti-fouling are selected from any one of an independent columnar ultra-fine protrusion 400 or a rod-like ultra-fine protrusion 500 connected in a horizontal and vertical grid shape, the height of the protrusion, the thickness of the pillar, or the rod. The thickness of is 5 ~ 40㎛, the spacing between the ultra-fine protrusions and ultra-fine protrusions is characterized in that 0.5 ~ 20㎛ to prevent the implantation of marine life larvae.

In addition, for reducing the frictional resistance, the upright micro-projection 200 for a riblet is shaped like a pillar with a thickness of 900 µm or less and a height of 2.0 mm or less with a height higher than that of the ultra-fine protrusions 400 and 500, in a softening process. The upper part of the micro-protrusion for the riblet is bent in the same direction as the shark scale to deform into the riblet-type micro-protrusion 300 structure, and the bend with a height of less than 1000㎛ is a property of material having flexibility and elasticity and friction with water Due to the vibration caused by the unstable state of the hull surface and self-cleaning to increase the anti-fouling efficiency, micro-vortices generated in the gap between the riblet-type fine protrusions 300 and the protrusions 300 can reduce frictional resistance hydrodynamically. It is characterized by a structure.

On the other hand, the softening process of the present invention is a process of bending the upper end of the protrusion in an upright state in order to transform the fine protrusion 200 for an upright riblet into a riblet structure, and heating the projection as shown in FIG. 6 within the softening temperature range below the melting point. After that, through a cooled guider mold 710 having a plate or roll-type release property set to a constant height as shown in FIG. 7 to cool at the same time as bending, the upper end of the protrusion is bent to have a riblet-type structure. It is characterized by.

In addition, the material of the film 100 in which the ultrafine protrusions 400 and 500 and the riblet-type fine protrusions 300 are molded are flexible thermoplastic resins, elastic thermoplastic elastomers, and natural or synthetic rubbers that can be softened by heat. Any one material selected from among, the self-lubricating material to lubricate the surface of the film 100 to increase the antifouling efficiency, and to increase the ship's ship speed, molybdenum disulfide (MoS2), tungsten disulfide (WS2), graphite (Graphite) ), Hexagonal boron nitride (h-BN) or talc (Talc) of one of the fine powder of the solid lubricant is added as an additive, the antibacterial substance is silver (Ag), copper (Cu), zinc (Zn) or silver (Ag), copper (Cu), zinc (Zn) compound containing an antibacterial agent in a fine powder or a zeolite (Zeolite), hydrophobicized for water repellency, characterized in that one or two or more of the antibacterial agents are added do.

In addition, the arrangement of the riblet-type fine protrusions 300 is characterized in that they are arranged in a honeycomb pattern structure in order to maintain a regular spacing between grid patterns or neighboring protrusions.

In addition, the film 100 of the present invention is a plurality of connected to the hull in the vertical direction and the left and right direction is attached to the adhesive, but the connection portion of each film 100 is a close contact of the film to increase the adhesive strength and water tightness due to the increased adhesive area The bottom surface of the stairs is in close contact with each other by using a stepped structure as a boundary surface, and it is characterized in that a film 900 for connection of thickness 1/2 of the film 100 is adhered to the film connection groove portion 800 which is an upper space between the boundary surfaces.

The antifouling and low friction film for ships using the ultrafine protrusions and riblet structure according to the present invention and its manufacturing method apply the lotus leaf effect to form the ultrafine protrusions smaller in size than the larvae of marine organisms on the surface of the film to form larvae. By not providing this implantable space, it is possible to prevent fuel loss due to frictional resistance that is proportional to the antifouling efficiency at the same time as eco-friendly antifouling in a physical way and to prevent the loss of fuel. It is effective to reduce the fuel of the ship by reducing the frictional resistance by hydrodynamically forming the rat-like micro-protrusions on the surface of the film.

In addition, the present invention has an antifouling function by simultaneously forming ultra-fine protrusions and riblet-type fine protrusions on the film in the same mold, thereby preventing marine organisms from attaching to the bottom of the ship's waterline, and reducing frictional resistance with water when sailing the ship. Two functions that can reduce fuel can be implemented at the same time, and the film can be attached to the hull to reduce the frictional resistance with eco-friendly antifouling and hydrodynamics.

In addition, the present invention is an eco-friendly material excellent in high tensile strength and abrasion resistance, and a self-lubricating material is added to thermoplastic urethane, which is a thermoplastic elastic material, and an antibacterial material is added as a secondary means of antifouling. By forming micro-protrusions and riblet-type micro-protrusions that reduce the frictional resistance of the ship dynamically, it is possible to save fuel by improving ship speed with eco-friendly antifouling function and at the same time reducing friction resistance, and as an environmentally friendly work process compared to antifouling coating method. The durability is improved, which is an economically useful effect.

In addition, the present invention is a film and the material of ultra-fine protrusions and riblet-type fine protrusions are thermoplastic elastic synthetic resins or rubbers having elasticity, so the vibration effect between the ultra-fine protrusions and the riblet-type fine protrusions is high, so the self-cleaning effect is high and applied to the hull. It has the effect of attenuating the vibration caused by the turbulence and the impact of the wave,

1 is an exemplary view showing a riblet structure of a shark scale.
Figure 2 is a process diagram showing the manufacturing method of the antifouling and low friction film for ships using the ultra-fine protrusions and riblet structure according to the present invention.
Figure 3 is an exemplary view showing a process for softening the surface by spraying heated air on the surface of the film according to the present invention.
Figure 4 is an exemplary view showing a state of simultaneously forming a fine projection for the upright riblet and ultra-fine projections using a roll-shaped mold on the surface of the film according to the present invention.
Figure 5 is an exemplary view showing a state in which the microscopic projections and ultra-fine projections for upright riblets are formed on the surface of the film according to the present invention.
Figure 6 is an exemplary view showing a state of softening below the melting point by heating the micro-protrusion portion for the riblets molded on the surface of the film according to the present invention.
7 is an exemplary view showing a state in which the film according to the present invention is passed through a roll-type guider mold or a plate-shaped mold to bend and cool the upper end of the fine protrusions for riblets.
Figure 8 is an exemplary view showing a completed state of the pillar-shaped ultra-fine protrusions independent of the riblet-type microscopic projections with the upper end curved on the surface of the film according to the present invention.
9 is an exemplary view showing a riblet-type micro-projection curved at the upper end of the film according to the present invention and a rod-shaped ultra-fine projection connected in a lattice shape.
Figure 10 is an exemplary view showing a state in which micro-vortex is generated by the riblet-type micro-protrusions on the surface of the film according to the present invention.
11 is an exemplary view showing a state in which a riblet-type micro-projection with an upper end curved on a surface of a film according to the present invention is arranged in a grid.
Figure 12 is an exemplary view showing a state in which the riblet-type fine protrusions are arranged in a honeycomb shape between the columnar ultrafine protrusions independent of the surface of the film according to the present invention.
Figure 13 is an exemplary view showing a state in which the riblet-type fine protrusions are arranged in a honeycomb shape between the rod-shaped ultra-fine protrusions connected in a lattice form to the surface of the film according to the present invention.
14 is an exemplary view showing a connection state of a film according to the present invention.

If described in detail with reference to the accompanying drawings, preferred embodiments of the present invention.

The antifouling and low friction film for ships using the ultrafine protrusions and riblet structure according to the present invention is provided with a film 100 that is attached to the hull under the ship's waterline by adding a self-lubricating material and an antibacterial material, and the film 100 On the surface of the erect type riblet micro-projection 200 protrudes, the upper end of the micro-projection 200 for the upright riblet is bent in the same direction as the shark scale as shown in FIG. 1, and transformed into a riblet-type structure. As a characteristic of a material having flexibility and elasticity, vibration occurs due to friction with water, thereby increasing the anti-fouling efficiency due to the unstable state and self-cleaning of the hull surface, and as shown in FIG. 10, micro vortices generated in the gap between the protrusions Is provided with a riblet-type micro-protrusion 300 that reduces the frictional resistance hydrodynamically, because the larvae of marine organisms can be implanted in the space with a large gap between the riblet-type micro-protrusions 300. Compared to the micro-protrusion 300, the micro-protrusions 400 and 500 are provided with a small size and uniformly arranged to protrude.

And the manufacturing method of the antifouling and low friction film for ships using the ultrafine protrusions and riblet structure according to the present invention is a step of preparing a film 100 material to which a self-lubricating material and an antibacterial material are added as shown in FIG. (S100), forming the film 100 material into a flat film (S200), heating the surface of the flat film 100 to a melting point or less using a heated air sprayer 600 as shown in FIG. 3 to soften it (S300), using a sheet making machine (sheet making M/C, roll mold 700) as shown in FIG. 4, superfine protrusions 400 and 500 and fine protrusions for upright riblets on the top of the flat film 100 whose surface is softened (200) forming step (S400), the step of softening by heating the upper part of the molded upright riblet (for) microprojection (200) below the melting point (S500), ultrafine projections (400, 500) and upright rib The step (S600), the surface of the film is simultaneously cooled while bending the top of the micro-projection 200 for the riblet by passing the film 100 with the softened portion 200 for the let through the roll-type guider mold 710 or the plate-shaped mold (S600) The step (S700) for completing the ultra-fine protrusions 400 and 500 and the riblet-shaped fine protrusions 300 is included.

In addition, since it is technically impossible to implement the ultra-fine protrusions 400 and 500 and the riblet-type fine protrusions 300 formed in a uniform size and uniform arrangement as described above by the coating method, the ultra-fine protrusions 400 as in the present invention , 500) and the riblet-type micro-protrusions 300 are made of a film 100 precisely molded by a mold, and it is only possible to adhere to the hull.

The present invention is a self-lubricating material made of a flexible thermoplastic resin, thermoplastic elastomer or rubber as a material to prevent marine organisms from adhering, and to generate fuel microdynamically to reduce frictional resistance during sailing to reduce fuel. As shown in FIG. 4, the surface of the film 100 to which the antimicrobial material has been added has an independent columnar ultrafine protrusion forming groove 702 and an upright riblet forming fine protrusion forming groove 701 as shown in FIG. For the reduction of frictional resistance by using the roll-type mold 700, the upright type micro-projection 200 for the riblet and the space between the micro-projection 200 for the riblet are spaced so that larvae of marine organisms cannot be implanted. In order to form the micro-protrusion for the riblet to form the micro-protrusion 200 for the riblet on the outer circumferential surface of the roll-shaped mold 700 in order to form the ultra-fine protrusions 400 and 500 having a smaller size than the micro-protrusion 200 for the riblet. The grooves 701 are provided at regular intervals, and the ultra-fine protrusions for forming the ultra-fine protrusions 400 and 500 between the grooves 701 for forming the fine protrusions for the riblet and the grooves 701 for the fine protrusions for the riblet are formed. Formed by a roll-shaped mold 700 provided with a forming groove 702 is mechanically formed in a uniform size and uniform arrangement, and the fine protrusions 200 for the upright riblets are formed as shown in FIGS. In the softening process, which is a subsequent process of heating, the upper part of the fine protrusion 200 for the upright riblet is heated and softened, and the rolled guider mold 710 is bent in the same direction as the shark scale to deform the upper part of the protrusion into a curved riblet structure. By doing so, the physical antifouling function by the independent columnar ultrafine protrusions 400 shown in FIG. 8 or the rod-like ultrafine protrusions 500 connected in a lattice shape shown in FIG. 9 and frictional resistance caused by the riblet type fine protrusions 300 The reduction function is performed simultaneously.

That is, the projections molded on the film 100 of the present invention are two types of ultra-fine projections 400 and 500 and riblet-type micro-projections 300 with curved upper portions of the projections, each of which has a constant size and arrangement of roughness and projections. This uniform, molded in the same mold can simultaneously increase the efficiency of antifouling and frictional resistance reduction.

In addition, the ultra-fine protrusions 400 and 500 for antifouling may be selected from independent columnar ultra-fine protrusions 400 or rod-like ultra-fine protrusions 500 connected in a horizontal and vertical grid shape as illustrated in FIGS. 8 and 9. The height of the hanaro projection and the thickness of the pillar or the thickness of the rod is 5 to 40 µm, and the spacing between the ultra-fine protrusions and the ultra-fine protrusions is preferably 0.5 to 20 µm to prevent the implantation of marine organism larvae. The microscopic projections (400, 500) are micrometers (µm) in size, and the gap between the small surface area and the protrusions is smaller than the size of the larvae of marine organisms, so that they do not provide the space needed for the larval implantation. Preventing implantation can prevent physical contamination.

On the other hand, as shown in FIG. 10, small vortices, which are micro-vortices generated in the gaps between the riblet-type micro-protrusions 300, act as a breakwater between the turbulence of the outer wall of the hull, thereby reducing frictional resistance hydrodynamically. Since the speed of the ship is increased like a shark, a certain gap should be maintained between the riblet-type micro-projection 300 whose curved upper part is curved and the neighboring riblet-type micro-projection 300.

Therefore, for reducing frictional resistance, the upright micro-projection 200 for riblets has a columnar shape of 900 µm or less and a height of 2.0 mm or less, which is higher than that of ultra-fine projections. The upper end of the shark is bent in the same direction as the scales to be transformed into the structure of the riblet-type micro-protrusion 300, and the height of the riblet-type micro-protrusion 300 curved to less than or equal to 1000 µm is a property of material having flexibility and elasticity. Vibration is generated due to friction with the unstable surface of the hull and self-cleaning improves the antifouling efficiency.

In addition, the ultra-fine vortices generated between the ultra-fine protrusions 400 and 500 and the protrusions 400 and 500 have a small vortex effect, but micro-vortices generated in a certain gap between the riblet-type fine protrusions 300 and the protrusions 300. The vortex effect is large, so it is desirable to perform a structure that can increase the effect of reducing frictional resistance hydrodynamically.

That is, the independent riblet-type micro-projections 300 spaced apart as described above generate micro-vortices in the gap and vibrate by friction with water, so that the surface of the hull becomes an unstable state for larvae of marine organisms to implant, and the magnetism caused by vibration The anti-fouling efficiency can be increased by the cleaning effect.

On the other hand, the applicant has invented the Republic of Korea Patent Registration No. 2024243 (name: manufacturing method of low friction antifouling lining for ships and offshore structures).

However, the microprotrusion of the low friction antifouling lining as described above protrudes upright from the surface of the film to bend the top by friction with water, but rather increases the frictional resistance, and has a wide gap between the protrusions and protrusions, resulting in low antifouling efficiency. There was.

For example, when only small fine protrusions are present, the antifouling function is excellent, but the efficiency of reducing the frictional resistance due to the riblet structure is little, and when only the riblet type fine protrusions are present, the frictional resistance reduction function is excellent due to the generation of fine vortex. However, since the spacing between the large-sized riblet-type fine protrusions is larger than that of the ultra-fine protrusions, the antifouling efficiency is lowered.

Therefore, in order to coexist the two types of protrusions according to the present invention, the ultra-fine protrusions 400 and 500 and the riblet-type fine protrusions 300, they must be molded in the same mold, and the spaces between the riblet-type fine protrusions 300 are rippled. It is possible to simultaneously perform anti-fouling and friction resistance reduction functions by uniformly arranging and forming ultra-fine protrusions 400 and 500 that are relatively smaller in size than the rat-like fine protrusions 300.

Specifically, the thickness of the riblet-type microscopic projections 300 is thicker and higher than that of the ultra-fine projections 400 and 500, and the upper portion of the riblet-shaped microscopic projections 300 is independent of the curved space and the riblet-type microscopic projections ( 300) The entire surface of the film 100 is formed by uniformly forming small micro-protrusions 400 and 500 in such a space because the gaps are wide due to the need for a constant gap between each other to provide a space for larvae to implant. In the anti-fouling function can be prevented from occurring.

In addition, when the upper portion of the riblet-type fine protrusion 300 is not bent and exists in an upright state, the thickness and height of the protrusion are larger than those of the ultra-fine protrusions 400 and 500, thereby increasing frictional resistance due to friction with water when sailing a ship. Because it is a factor that must be bent in the same direction as the shark scales as shown in FIGS. 7, 8 and 9, the riblet structure of the shark scales as shown in FIG. 1 is effective in generating micro-vortex while reducing frictional resistance.

On the other hand, the material of the film 100 in which the riblet-type fine protrusions 300 and ultra fine protrusions 400 and 500 of the present invention are molded is a material having high tensile strength and abrasion resistance, and is a flexible nylon and polyester. ), and a thermoplastic resin such as TPU (Thermo Plastic Urethane), which is preferably molded from one material selected from heat-deformable natural or synthetic rubber.

The softening process of the present invention is a softening process shown in FIG. 3 for forming a projection on a flat film, and a process of bending the upper end of the protrusion in an upright state in order to transform the upright type micro-projection 200 for a riblet into a riblet-type structure. As shown in FIGS. 6 and 7, after heating and softening the fine protrusions 200 for the riblets within a softening temperature range below the melting point, a cooled guider mold having a release property of a plate or roll type set to a constant height ( 710) to pass through and cool at the same time by bending, the upper end of the projection is bent to a certain height to have a structure of a riblet-type micro-projection 300.

And ultra-fine protrusions (400, 500) and riblet-type fine protrusions (300) lubricate the surfaces of the film (100) to be molded to increase antifouling efficiency and to increase the ship's ship's speed. It is preferred to add as a additive one of molybdenum (MoS2), tungsten disulfide (WS2), graphite (Graphite), hexagonal boron nitride (h-BN) or talc (Talc) solid lubricant fine powder.

In addition, the antimicrobial substance is an auxiliary means in addition to the ultra-fine protrusions 400 and 500 and the riblet-type fine protrusions 300 that are physically soiled for antifouling of marine organisms. The antibacterial agents are silver (Ag), copper (Cu), and zinc (Zn). ) Or silver (Ag), copper (Cu), zinc (Zn) compound of fine powder or zeolite (Zeolite) containing an antibacterial agent, hydrophobic for water repellent function, and adding one or two or more of the antibacterial agent It is preferred.

The material of the film 100 in which the ultrafine protrusions 400, 500 and the riblet-type fine protrusions 300 are molded according to the present invention are excellent in high tensile strength and abrasion resistance, so that the self-lubricating material and the antibacterial material are added or removed. There is little concern about pollution of the marine environment due to, and the surface hardness of the antifouling paint is relatively high, so there is a high risk of pollution of the marine environment due to peeling.

And if the material is an elastic material such as TPU (thermoplastic urethane) or rubber, which is a kind of thermoplastic elastic body, the protruding part increases the vibration due to friction with water and has a high self-cleaning effect, and turbulence and tampering applied to the hull Elastomeric material attenuates the impact caused by the effect.

Mechanical molding of the film 100 according to the present invention is made by any one method selected from a method of calendar forming machine (Sheet making M/C, that is, calendar M/C, roll mold 700), vacuum molding, and heat compression molding, The mold is manufactured by laser, etching and discharge processing.

In addition, the ultra-fine protrusions 400 and 500 and the fine protrusions 200 for the riblets are simultaneously molded in the same mold, and the fine protrusions 200 for the riblets that are formed in an upright state are bent in a later process to bend the upper portion of the protrusions. It is transformed into a riblet-type fine protrusion 300.

The post-process is a softening process as described above, as shown in FIGS. 6 and 7, after heating the fine projections 200 for the riblets in an upright state to a softening temperature range below the melting point, there is a release property, and is constant as a cooling state. It is a process of transforming into a riblet-type micro-protrusion 300 which is curved at the same time by bending and cooling at the same time as it passes through a plate-shaped or roll-shaped guider mold 710 set at a height, wherein the micro-protrusion 200 for the riblet is a second It is higher than the height of the fine protrusions 400 and 500 so that it can be selectively bent.

The heating method of the softening process for forming the projections on the flat film 100 and the softening process for bending the erect projections as described above is non-contact, spraying of heated air, heating using radiant heat, and roll type for heat conduction by contact It is preferable to conduct heating by passing through a heating device, and selecting one of the heating methods.

The ultra-fine protrusions 400 and 500 of the present invention are spaced apart from each other and are formed as bar-types (Bar type, 500) as independent protrusions 400 or grid-like protrusions, but the height of the protrusions and the thickness of the pillars or the The thickness is 5~40㎛, and the space between the ultra-fine protrusions and the ultra-fine protrusions is 0.5~20㎛, minimizing the space where the larvae of marine organisms can be implanted, and uniformly sized and uniformly arranged on the entire surface of the film 100 It is molded with a furnace, and one of a column or a rod is selected.

In addition, the fine projection 200 for the riblet is a column shape, the size is different depending on the resistance of the water for each position of the hull, the thickness of the pillar is 900㎛ or less, the height is 2.0mm or less, the upper end of the projection in the softening process, which is a post process It is desirable to bend and transform into a riblet-type fine protrusion 300 having a height of 1000 µm or less.

Then, the microscopic projections 400 and 500 are uniformly arranged on the entire surface of the film 100, the riblet-type micro-projection 300 is formed, the arrangement is as shown in Figures 8, 9 or 12, 13 It is arranged in a honeycomb pattern structure in order to make the spacing between grid patterns or neighboring protrusions constant, and it is preferable to select one of them and perform it.

On the other hand, the film 100 of the present invention, as shown in FIG. 14, a plurality of the hulls are arranged in a vertically and horizontally connected direction to be adhered with an adhesive, but the connection portion of each film 100 is strengthened in adhesion and watertightness due to an increase in the adhesive area In order to increase the contact surface of the film 100 in close contact with each other by using a stepped structure, the lower ends of the steps are in close contact with each other, and the upper space between the interface is provided with a film connecting groove 800 to connect 1/2 of the thickness of the film 100 The adhesive film and the watertightness can be improved by adhering the molten film 900 to the film connecting groove portion 800.

The antifouling and low friction film for ships using the ultrafine protrusions and riblet structure of the present invention and its manufacturing method apply the lotus leaf effect to form an ultrafine protrusion having a smaller size than the larvae of marine organisms on the surface of the film. By not providing a space for the larvae to implant, it is possible to prevent fuel loss due to frictional resistance that is proportional to the antifouling efficiency at the same time as eco-friendly antifouling in a physical way, and by applying the shark scale riblet structure. By forming the riblet-type micro-protrusions on the surface of the film, the frictional resistance can also be reduced hydrodynamically to save fuel for the ship. It prevents marine organisms from attaching to the bottom of the ship's waterline and can reduce the frictional resistance with water when sailing the ship, and can simultaneously implement two functions that can save fuel. It is possible to reduce the mechanical frictional resistance.

In the foregoing, although specific embodiments of the present invention have been described and illustrated, the present invention is not limited to the described embodiments, and it is common knowledge in the field of this technology that various modifications and modifications can be made without departing from the spirit and scope of the present invention. It is obvious to those who have it. Therefore, such modifications or variations should not be individually understood from the technical spirit or viewpoint of the present invention, and the modified embodiments should belong to the claims of the present invention.

100: film
200: fine projection for riblets
300: riblet-type fine protrusions
400: independent columnar ultrafine projection
500: rod-shaped ultra-fine protrusions connected in a grid shape
600: heated air sprayer
700: roll mold
701: Groove for micro-protrusion molding for riblets
702: Pillar type ultra-fine protrusion forming groove
710: Roll-type guider mold
800: film connecting groove
900: Connection film

Claims (11)

A film 100 to which a self-lubricating material and an antibacterial material are added and adhered to the hull under the ship's waterline;
A fine protrusion 200 for an upright riblet protrudes on the surface of the film 100, and the upper end of the fine protrusion 200 for an upright riblet is bent in the same direction as a shark scale in a softening process, which is a post-process, to form a riblet-type structure. As it is a material with flexibility and elasticity, vibration occurs due to friction with water, thereby increasing the antifouling efficiency due to the unstable condition and self-cleaning of the hull surface, and micro-vortex generated in the gap between the protrusions is hydrodynamically A riblet-type fine protrusion 300 that reduces frictional resistance;
The space between the riblet-type micro-protrusions 300 on the surface of the film 100 is larger than that of the riblet-type micro-protrusions 300 in a uniform size and uniform arrangement for antifouling so that the larvae of marine organisms cannot be implanted in a space with a large space between them. It includes ultra-fine projections (400, 500) protruding small,
The film 100 is disposed on the hull by connecting a plurality of up and down, left and right directions with adhesive, and the connecting portion of each film 100 is stepped on the interface of the film that is in close contact to enhance adhesion and increase water tightness due to an increase in the adhesive area. Ultra-fine protrusions characterized by adhering a connection film 900 of 1/2 thickness of the film 100 to the film connecting groove portion 800, which is the upper space between the boundary surfaces, in close contact with each other with a structure. Antifouling and low friction film for ships using the riblet structure.
delete To prevent marine organisms from adhering to the ship's hull, and generate hydrodynamic micro-vortices to reduce frictional resistance during sailing to reduce fuel, flexible thermoplastic resins, thermoplastic elastomers, or rubbers are used as self-lubricating materials and In order to reduce frictional resistance on the surface of the film 100 to which an antibacterial substance is added, larvae of marine organisms may be implanted in a space with a large gap between the fine protrusions 200 for riblets and the fine protrusions 200 for riblets at the same time. Micro-protrusions for riblets for forming micro-protrusions for riblets 200 on the outer circumferential surface of the roll-shaped mold 700 in order to form ultra-fine projections 400 and 500 having a smaller size than anti-reflection micro-protrusions 200 Forming grooves 701 are provided at regular intervals, and for forming ultra-fine protrusions 400 and 500 between the rib-forming micro-protrusion molding groove 701 and the riblet micro-protrusion molding groove 701 The micro-protrusion forming groove 702 is mechanically molded in a uniform size and uniform arrangement by the roll-shaped mold 700 provided, and the upright riblet micro-protrusion 200 is formed of a protrusion in a softening process, which is a post process of molding. By bending the upper end in the same direction as the shark scale, the upper end of the projection is deformed into a curved rib-shaped micro-protrusion 300 structure, resulting in physical antifouling function by the ultra-fine projections 400 and 500 and friction by the riblet-type micro-protrusion 300 Anti-fouling for ships using ultra-fine protrusions and riblet structures characterized in that only the ultra-fine protrusions (400, 500) are molded for anti-fouling on the barge and stationary offshore structures, which simultaneously perform the function of reducing resistance. And a method of manufacturing a low friction film.
The method according to claim 3, wherein the ultra-fine protrusions (400, 500) for antifouling
The height of the protrusion, the thickness of the pillar, or the thickness of the rod is 5 to 40㎛, and the ultrafine protrusion and the second are selected from the independent columnar ultrafine protrusions 400 or the rod-like ultrafine protrusions 500 connected in a horizontal and vertical grid shape. The gap between the fine protrusions is 0.5 to 20㎛ to prevent the formation of marine larvae. The method for manufacturing a ship's antifouling and low friction film using an ultrafine protrusion and a riblet structure.
The method according to claim 3, The fine projections for upright riblets for reducing the frictional resistance 200
The columnar shape is 900 µm or less, and the height is 2.0 mm or less, and is molded to have a higher height than the ultra-fine protrusions. In the softening process, the upper part of the fine protrusions 200 for the riblets is bent in the same direction as the shark scales, thereby forming the riblet-type fineness. The protrusion 300 is transformed into a structure, and the protrusion curved to a height of 1000 µm or less is a property of a material having flexibility and elasticity, and vibration occurs due to friction with water, thereby increasing the antifouling efficiency through unstable conditions and self-cleaning of the hull surface. , The micro-vortex generated in the gap between the riblet-type micro-projection 300 and the projection 300 is a structure capable of reducing frictional resistance hydrodynamically, the ship's antifouling for ships using the ultra-fine projection and the riblet structure. And a method of manufacturing a low friction film.
The method according to claim 3, The softening process is a process of bending the upper end of the protrusion in an upright state in order to deform the microscopic projection 200 for the riblet-shaped upright type into a riblet-shaped structure, and after heating the protrusion within the softening temperature range below the melting point to soften it. , Ultra-fine protrusions characterized by having a riblet-type structure by passing the cooled guider mold (710) having a plate or roll-shaped release property set at a constant height and simultaneously bending and cooling, thereby bending the upper end of the protrusion to a constant height. And a method for manufacturing a ship's antifouling and low friction film using a riblet structure.
The method according to claim 3, The ultra-fine projections (400, 500) and the material of the film 100 is formed of the riblet-type micro-projection (300) is a flexible thermoplastic resin, elastic thermoplastic elastomer, natural softenable by heat A method for manufacturing an antifouling and low friction film for ships using an ultrafine protrusion and a riblet structure, characterized in that it is any one material selected from rubber or synthetic rubber.
The method according to claim 3, The self-lubricating material to lubricate the surface of the film 100 to increase the antifouling efficiency, and to increase the ship's ship speed molybdenum disulfide (MoS2), tungsten disulfide (WS2), graphite (Graphite), hexagonal system A method for manufacturing an antifouling and low friction film for ships using an ultrafine protrusion and a riblet structure, characterized in that one of the fine particles of a solid lubricant of boron nitride (h-BN) or talc is added as an additive.
The method according to claim 3, The antibacterial material is silver (Ag), copper (Cu), zinc (Zn) or silver (Ag), copper (Cu), zinc (Zn) compound of fine powder or zeolite (Zeolite) contains an antibacterial agent And, it is hydrophobic for the water repellent function, and a method for manufacturing an antifouling and low friction film for ships using an ultrafine protrusion and a riblet structure, characterized in that one or two or more of the antibacterial agents are added.
The method according to claim 5, The arrangement of the riblet-type micro-protrusions (300) Ultra-fine projections, characterized in that arranged in a honeycomb (honey comb pattern) structure in order to make the spacing of the grid pattern or neighboring projections constant And a method for manufacturing a ship's antifouling and low friction film using a riblet structure.
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