Carbon-containing water-dispersible polyurethane antistatic coating composition
Patent Information
- Application Number
- KR1020260144763
- Authority / Receiving Office
- KR · KR
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2026-08-04
- Publication Date
- 2026-09-21
- Estimated Expiration
- 2046-04-15
Smart Images
Figure 112026095045331-PAT00001_ABST
Abstract
Description
Technology Field
[0001] The present invention relates to a carbon-containing water-dispersible polyurethane antistatic coating composition, and more specifically, to a carbon-containing water-dispersible polyurethane antistatic coating composition designed to immediately restore fabric damage of an aged measuring instrument protective bag on-site and to safely protect expensive internal precision instruments by lowering the surface resistance value to form an electrostatic shielding layer. Background Technology
[0003] The background field of this invention is maintenance and functional fabric coating technology for protective bags used to store and transport precision measuring equipment and instruments. Precision measuring instruments are designed so that their internal circuits and sensors are highly vulnerable to external shocks, moisture, and especially minute electrostatic discharges. When transporting or storing such expensive equipment in industrial sites or outdoors, dedicated protective bags made of high-density foam and special functional fabrics are essential for protecting the devices. In their initial state, instrument protective bags feature a water-repellent coating and anti-static treatment on the outer surface of the fabric, providing excellent protective performance that perfectly shields the internal equipment from the external environment. However, prolonged use of the bags in harsh industrial environments inevitably leads to fabric deterioration due to exposure to ultraviolet rays, continuous physical friction, and contact with moisture and chemicals. Consequently, the fabric surface discolors or whitening occurs, not only damaging the aesthetics but also significantly degrading the most critical functions: moisture resistance and anti-static properties. In particular, bags that have lost their electrostatic shielding performance transmit static electricity generated by friction in winter or dry environments directly into the interior, becoming a critical cause of fatal damage and irreversible malfunctions in precision measuring instrument circuits. Conventionally, when a bag deteriorated due to aging, it was necessary to either discard the entire expensive bag and purchase a new one, or commission experts from the manufacturer to undergo a complex recoating process, which consumed enormous costs and time. Some simple fabric sprays or polishes sold on the market only provide temporary color restoration or shallow water-repellent effects, and have distinct technical limitations in that they cannot form a functional film that fundamentally shields static electricity by lowering electrical resistance.In addition, the tools for workers to immediately mix the coating solution on-site and apply it with consistent quality were not systematized and were fragmented, so when a non-expert general user performed maintenance work, the coating film would clump thickly or leave severe brush marks, which actually damaged the appearance and flexibility of the bag.
[0004] Meanwhile, the aforementioned background technology is technical information that the inventor possessed for the derivation of the present invention or acquired during the process of deriving the present invention, and it cannot necessarily be considered publicly known technology disclosed to the general public prior to the filing of the present invention. Prior art literature
[0006] Korean Registered Patent No. 10-1818751 (Registered Jan. 09, 2018) Korean Registered Patent No. 10-1804895 (Registered Nov. 28, 2017) The problem to be solved
[0007] The problem that the present invention aims to solve is to provide an integrated portable coating kit that allows a user to directly restore the exterior of a bag and immediately impart anti-static and moisture-proof performance on-site without separate equipment, in order to resolve the issues of fabric damage and degradation of electrostatic shielding performance that occur when a protective bag for expensive precision measuring instruments deteriorates due to long-term use.
[0008] In addition, the present invention aims to provide an optimized customized mixing and application device that maximizes on-site portability through the systematic storage of components and enables even non-experts to easily adjust the ratio of the coating solution to ensure uniform application quality without streaks.
[0009] The technical problems of the present invention are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art from the description below. means of solving the problem
[0011] A carbon-containing water-dispersible polyurethane antistatic coating composition according to one embodiment of the present invention comprises: a coating liquid concentrate container for forming an electrostatic shielding layer by restoring the fabric of a precision measuring instrument protective bag and reducing the surface resistance value; a metering dilution container equipped with a metering scale so that a user can directly adjust the concentration of the coating liquid according to the fabric condition of the precision measuring instrument protective bag; a fine sprayer for receiving the coating liquid diluted from the metering dilution container and spraying it onto a target area of the precision measuring instrument protective bag; a flat-shaped application brush made of natural bristles to minimize hair marks and form a uniform coating film in accordance with the natural drying characteristics of the coating liquid; and a storage case with a hard case structure that protects the interior from external impact and forms a plurality of mounting grooves for components by custom-cutting high-density foam inside.
[0012] In one embodiment, the coating solution may be a composition in which the fine carbon powder and natural black pigment are dispersed using the water-dispersible polyurethane (PUD) as a base.
[0013] In one embodiment, the fine carbon powder can form an electrostatic shielding layer by penetrating the surface and micropores of the precision measuring instrument protective bag fabric upon application to form a continuous conductive network, thereby reducing the surface resistance value of the precision measuring instrument protective bag fabric to the anti-static standard range of 10^5 to 10^9 Ω / sq.
[0014] In one embodiment, the natural black pigment can physically conceal whitening or discoloration caused by aging and UV exposure of the precision measuring instrument protective bag fabric, thereby restoring the appearance and providing color uniformity.
[0015] In one embodiment, the solid content of the entire composition of the coating solution is controlled to maximize film bonding strength without compromising the original flexibility of the precision measuring instrument protective bag fabric after application, and the particle size of the fine carbon powder and natural black pigment can be controlled to a micro-unit or smaller so that they can smoothly penetrate to the core without blocking the pores of the precision measuring instrument protective bag fabric.
[0016] In one embodiment, the coating solution can support multi-mode coating that varies the penetration and coating methods depending on the fabric material of the target precision measuring instrument protective bag by adjusting the mixing ratio using the metering dilution container.
[0017] In one embodiment, the multi-mode coating includes a first mode that strengthens internal bonding by maximizing liquid penetration into internal pores of the fabric by lowering the dilution concentration of the coating solution when the fabric material is a textile fiber, and a second mode that forms an external protective layer by maximizing bonding strength and film-forming strength on the surface of the fabric by increasing the dilution concentration of the coating solution when the fabric material is polyurethane (PU), polyvinyl chloride (PVC), or synthetic leather, so that a fabric-customized coating can be performed according to the user's selection.
[0018] In one embodiment, the metering dilution container is formed of a transparent or translucent material that allows the level of the internal contents to be visually identified, and the outer surface may be provided with a precision metering scale to numerically check the input volume of the coating solution and the dilution solution (water).
[0019] In one embodiment, the metering dilution container may be configured to induce a high-concentration formulation with a higher proportion of the coating solution concentrate for areas where the fabric of the precision measuring instrument protection bag is extremely aged or severely damaged, and a low-concentration formulation with a lower proportion of the concentrate for general surface maintenance areas, so that the user can intuitively adjust the formulation ratio according to the degree of damage to the fabric on-site.
[0020] In one embodiment, the metering dilution container allows the dilution process to be reproduced under the same conditions as the previous operation through the mixing ratio quantified on the precision metering scale during a large-area repetitive coating operation where additional coating liquid is required, thereby preventing variations in coating quality, including the thickness of the coating film, electrostatic shielding rate, and drying speed, across the entire coating area and maintaining the same quality.
[0021] A carbon-containing water-dispersible polyurethane antistatic coating composition according to another embodiment of the present invention may further include an automatic application device that is attached to a precision measuring instrument protective bag and automatically rubs the coating liquid sprayed onto the fabric surface to apply it uniformly.
[0022] In one embodiment, the automatic dispensing device comprises: an installation frame installed along each edge of the original surface of a precision measuring instrument protective bag to which a coating liquid is to be applied; a first rail extending in the front-rear direction along one side and the other side of the installation frame; a second rail connected so that one side and the other side can slide along the first rail in the front-rear direction; a slider sliding in the left-right direction along the second rail; a pressure lifting cylinder installed upright below the slider to drive extension and contraction; a rotary drive motor installed below the pressure lifting cylinder to provide rotational driving force; an eccentric rotating plate formed in the shape of a circular flat plate and installed by axial coupling to the drive shaft of the rotary drive motor, wherein the drive shaft of the rotary drive motor is installed eccentrically from the center and rotates while in close contact with the original surface; an installation groove formed in a recess on the bottom surface of the eccentric rotating plate that is seated on the original surface; a rotating disc formed in the shape of a circular flat plate having an opening in the center and installed to be rotatable inside the installation groove; and a disc rotation driving unit that drives the rotating disc to rotate in the forward or reverse direction. It may include an auxiliary spray nozzle installed on the inner side of the above-mentioned installation groove, exposed through the central opening of the above-mentioned rotating disc, and spraying additional coating liquid onto the surface of the fabric; and a variable coating unit installed on the lower side of the above-mentioned rotating disc, which applies coating liquid to the surface of the fabric while rotating in close contact with the surface of the fabric.
[0023] In one embodiment, the variable coating unit comprises: a cylindrical pipe-shaped guide outer wall installed along the lower edge of the rotating disc; a cylindrical pipe-shaped guide inner wall installed along the lower side of the rotating disc, spaced apart from the guide outer wall in the direction of the center of the rotating disc; a porous coating pad inserted and installed in the space between the guide outer wall and the guide inner wall so as to be exposed to the lower side of the space between the guide outer wall and the guide inner wall, and which rubs and applies a coating liquid to the surface of the surface while rotating in a state of being seated in close contact with the surface of the surface; a hollow groove extended along the upper side of the porous coating pad so as to expose the bottom surface of the rotating disc; a cylindrical pipe-shaped first guide tube installed along the outer surface of the hollow groove; a cylindrical pipe-shaped second guide tube installed along the inner surface of the hollow groove; and a first vertical lifting rail installed upright with a plurality of them spaced apart at regular intervals along the inner surface of the first guide tube. A second vertical lifting rail installed upright with a plurality of them spaced apart at regular intervals along the outer surface of the second guide tube; a lifting compression ring formed in a donut-shaped circular flat plate corresponding to the shape of the space between the first guide tube and the second guide tube, guided by the first vertical lifting rail and the second vertical lifting rail, and moving up and down between the first guide tube and the second guide tube; a plurality of foldable pressure links, each having a first link frame installed connected to the lower side of the guide outer wall and a second link frame installed connected to the lower side of the guide inner wall, connected so as to be foldable in an "ㅅ" shape and positioned between the first guide tube and the second guide tube, wherein as the lifting compression ring descends, the first link frame and the second link frame unfold to become a straight line, thereby compressing the porous coating pad located below them and adhering it to the original surface; and a compression driving ring formed in a circular ring shape and connected so as to be rotatable along the bottom surface of the rotating disc.It may include: a plurality of compression drive cams spaced apart and installed along the lower side of the compression drive ring and rotating together with the compression drive ring; a plurality of cam followers spaced apart and installed along the upper side of the lifting compression ring, which are pushed downward by the compression drive cams to move the lifting compression ring downward; and a ring rotation drive unit that rotates the compression drive ring. Effects of the invention
[0025] The carbon-containing water-dispersible polyurethane antistatic coating composition according to the present invention penetrates deep into the pores of aged fabric through a coating solution in which water-dispersible polyurethane (PUD) and fine carbon powder are combined to form a continuous conductive network, thereby providing the effect of perfectly restoring the electrostatic shielding performance of the bag surface and perfectly protecting sensitive precision measuring instruments inside from fatal electrical shock.
[0026] In addition, by providing a functional composition containing natural black pigment along with a dedicated flat brush, even a non-professional can restore the appearance of bags severely whitened or discolored by UV rays or friction to a smooth and uniform like-new look without brush marks, offering high aesthetic satisfaction and the benefits of extended product lifespan.
[0027] In addition, since a precision dilution container equipped with measuring scales and a fine sprayer are configured as a single kit, even general users can intuitively and accurately adjust the concentration of the coating solution according to the condition and extent of damage of the bag fabric, providing excellent work convenience that enables the formation of a consistent and high-quality coating film even during large-area work.
[0028] Finally, by adopting a hard case structure with high-density foam cut to fit the shape of the internal components, it not only safely protects chemical solutions and glass containers from external impacts but also allows all components necessary for bag maintenance to be conveniently carried at once like a suitcase, effectively realizing an immediate total care solution regardless of location or environment.
[0029] The effects of the present invention are not limited to those mentioned above, and various effects may be included within the scope obvious to a person skilled in the art from the contents described below. Brief explanation of the drawing
[0031] FIG. 1 is a diagram showing the schematic configuration of a carbon-containing water-dispersible polyurethane antistatic coating composition according to one embodiment of the present invention. FIG. 2 is a flowchart illustrating a coating method using a carbon-containing water-dispersible polyurethane antistatic coating composition according to one embodiment of the present invention. FIG. 3 is a drawing showing another embodiment of a carbon-containing water-dispersible polyurethane antistatic coating composition according to the present invention. Figure 4 is a drawing showing the automatic dispensing device of Figure 3. Figures 5 and 6 are drawings showing the variable coating portion of Figure 4. Specific details for implementing the invention
[0032] The following detailed description of the invention refers to the accompanying drawings, which illustrate specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that various embodiments of the invention are different but need not be mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in relation to one embodiment. It should also be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. Accordingly, the following detailed description is not intended to be limiting, and the scope of the invention is limited only by the appended claims, including all equivalents to those claimed therein, provided appropriately described. Similar reference numerals in the drawings refer to the same or similar functions across various aspects.
[0033] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings.
[0034] FIG. 1 is a diagram showing the schematic configuration of a carbon-containing water-dispersible polyurethane antistatic coating composition according to one embodiment of the present invention.
[0035] Referring to FIG. 1, a carbon-containing water-dispersible polyurethane antistatic coating composition (10) according to one embodiment of the present invention comprises a coating liquid concentrate container (100-1, 100-2), a metering dilution container (200-1, 200-2), a fine sprayer (300), a brush for application (400), and a storage case (500).
[0036] The coating liquid concentrate container (100) serves to contain and store the coating liquid for the purpose of restoring the fabric of the precision measuring instrument protection bag (1) and forming an electrostatic shielding layer by reducing the surface resistance value. It is made of a sealed structure that completely blocks contact with external air so that the water-dispersible polyurethane concentrate contained inside does not harden or its physical properties deteriorate even during long-term storage.
[0037] In one embodiment, the coating solution comprises water-dispersible polyurethane (PUD), fine carbon powder, and natural black pigment.
[0038] The coating solution is a functional composition in which fine carbon powder and natural black pigment are dispersed in precise proportions on a water-dispersible polyurethane (PUD) base; it is a key material that chemically regenerates damaged fabrics based on excellent adhesion and flexibility while adopting an eco-friendly water-based method.
[0039] Fine carbon powder penetrates deep into the surface and micropores of the precision instrument protective bag fabric when applied, forming a continuous conductive network, thereby effectively reducing the surface resistance of the precision instrument protective bag fabric to the anti-static standard range of 10^5 to 10^9 Ω / sq, forming an electrostatic shielding layer, and protecting sensitive instruments from electric shock.
[0040] Natural black pigment physically conceals whitening or discoloration caused by aging and UV exposure of precision instrument protective bag fabrics, restoring appearance and color uniformity, and unlike artificial compound dyes, restores natural black aesthetics without damaging the fabric's inherent texture.
[0041] The coating solution itself is adjusted to an optimal solid content of the entire composition to maximize film bonding strength without compromising the original flexibility of the precision instrument protective bag fabric after application, and the particle size of the fine carbon powder and natural black pigment is finely controlled to the micro-level or smaller so that it can smoothly penetrate deep into the fabric without clogging the pores of the precision instrument protective bag fabric.
[0042] A coating solution according to one embodiment of the present invention having the composition described above has the advantage of achieving high-performance coating quality that simultaneously satisfies visual resilience and functional electrostatic suppression by allowing micro-sized conductive particles to form a stable shielding network inside the fabric, going beyond simple surface coloring.
[0043] The metering dilution container (200) is equipped with a metering scale so that the user can directly adjust the concentration of the coating solution according to the condition of the fabric of the precision measuring instrument protection bag, thereby supporting the immediate and accurate performance of a customized mixture with an optimized concentration on-site, tailored to the degree of aging or material characteristics of the target bag.
[0044] In one embodiment, the metering dilution container (200) includes a precision metering scale.
[0045] The metering dilution container (200) is formed with a body made of a transparent or translucent material that allows the level of the internal contents to be intuitively identified by visual inspection, and the outer surface is provided with a precision metering scale in the form of printing or engraving to clearly numerically confirm the input volume of the coating solution concentrate and the dilution solution (water).
[0046] The precision weighing scale provides a reference point that allows users to intuitively adjust the mixing ratio on-site without complex calculations, based on the degree and area of fabric damage. This is achieved by inducing a high-concentration formulation with a higher proportion of the undiluted coating solution for areas of the precision measuring instrument protective bag where the fabric is extremely aged or severely damaged, and a low-concentration formulation with a lower proportion of the undiluted solution for areas requiring general surface maintenance.
[0047] In addition, the metering dilution container (200) enables the dilution process to be repeated under conditions exactly identical to the previous operation based on the mixing ratio quantified on the precision metering scale during a large-area repeated coating operation where additional coating liquid is required, thereby preventing deviations in coating quality, including the thickness of the coating film, electrostatic shielding rate, and drying speed, across the entire coating area and maintaining consistent quality even when the work is divided into multiple steps.
[0048] A metering dilution container (200) according to one embodiment of the present invention having the configuration described above provides convenience so that even a non-expert general user can immediately perform professional-level, consistent functional coating liquid formulation on-site, and provides a pivotal effect of maximizing the reliability of the entire kit by preventing cracking or stickiness defects of the coating film caused by ratio failure in advance.
[0049] The micro sprayer (300) is intended to receive the coating liquid that has been diluted in the metering dilution container (200) and spray it onto the target area of the precision measuring instrument protection bag. By atomizing the coating liquid through a pumping action, it allows the liquid to reach the surface of the fabric widely and evenly without clumping, thereby providing a basic step for forming a uniform coating film.
[0050] The application brush (400) is provided in a flat shape made of natural bristles to minimize hair marks and form a uniform coating film in accordance with the natural drying characteristics of the coating liquid, and evenly spreads fine droplets sprayed through the fine sprayer (300) into the surface and pores of the fabric to complete a smooth texture so as not to feel unnatural after drying.
[0051] The storage case (500) is made of a hard case structure that firmly protects the interior from external impact and has multiple seating grooves formed by custom-cut high-density foam inside to allow components to be seated without shaking, thereby preventing collision damage between components when the user moves to the site and allowing all tools required for work to be carried at once.
[0052] A carbon-containing water-dispersible polyurethane antistatic coating composition (10) according to one embodiment of the present invention having the composition described above exhibits an excellent effect of immediately restoring the appearance of a bag protecting expensive measuring equipment to like-new condition on-site without the need for separate external requests or specialized facilities when the bag becomes old, while simultaneously providing new electrostatic shielding and moisture-proof functions to extend the lifespan of the bag and safely protect the internal equipment.
[0054] Meanwhile, as shown in FIG. 1, the coating liquid concentrate container (100) and the metering dilution container (200) may be provided in multiple quantities, such as ‘100-1, 100-2’ and ‘200-1, 200-2’, respectively, corresponding to the type of coating liquid applied or the quantity (capacity) required for the operation.
[0055] Specifically, when multiple types of coating liquids with different compositions or characteristics are required simultaneously because the fabric materials of different parts of the protective bag for the precision measuring instrument (e.g., the fabric fiber material of the main body and the synthetic leather material of the corner finishing part) are mixed, the user can store each different liquid independently without mixing through two or more coating liquid liquid containers (100-1, 100-2).
[0056] In addition, since multiple metering dilution containers (200-1, 200-2) are provided, when a large amount of coating solution is required to restore a large-area bag or to work on multiple bags continuously, a coating solution for the first mode and a coating solution for the second mode, having different dilution concentrations, can be separated, metered, and prepared simultaneously.
[0057] The container configuration (100-1, 100-2, 200-1, 200-2) provided in this manner, which is equipped with two or more containers, fundamentally eliminates the inconvenience and time delay of having to wash one container and remix it to a different concentration during operation, and provides the advantageous effect of maximizing the field work efficiency and continuity of the multi-mode coating aimed at in the present invention.
[0059] A carbon-containing water-dispersible polyurethane antistatic coating composition (10) according to one embodiment of the present invention having the configuration described above may further include a kit manual (700) and a coating fusion (800).
[0060] The kit manual (700) is a visual guide that provides detailed usage procedures and mixing guides so that even non-expert general users can perform bag restoration and coating work immediately and accurately on-site without separate training.
[0061] In one embodiment, the kit manual (700) is stored on one side inside the storage case (500) and specifies the optimal dilution ratio of a multi-mode coating, which varies the penetration and film formation methods of the coating liquid depending on the fabric material (textile fiber, polyurethane, polyvinyl chloride, synthetic leather, etc.) and aging state of the precision measuring instrument protection bag, using intuitive charts and numbers.
[0062] The kit manual (700) contains step-by-step instructions, along with illustrations, on how to read the precision measuring scale of the measuring dilution container (200) and mix, the appropriate spraying distance and angle of the fine sprayer (300), and how to finish the coating liquid without streaks using the application brush (400) and the application cloth (800).
[0063] The kit manual (700) having the configuration described above plays a pivotal role in preventing defects such as cracking or stickiness of the coating film caused by failure in mixing the coating liquid, regardless of the operator's skill level, and in helping to achieve excellent and uniform electrostatic shielding performance and appearance restoration quality over the entire coating area.
[0064] The coating cloth (800) is a multi-purpose functional cloth provided to pre-treat the surface of the fabric to an optimal state before and after coating and to smoothly finish the surface after the coating solution is applied.
[0065] In one embodiment, the coating cloth (800) can be used for pre-cleaning purposes to maximize the surface adhesion and penetration of the coating liquid by removing fine dust or foreign substances attached to the surface of the precision measuring instrument protective bag without scratching before applying the coating liquid.
[0066] Additionally, the coating cloth (800) is used for a finishing purpose to buff the thickness of the coating film by gently wiping away and absorbing any residue of the coating liquid that is locally clumped or excessively applied on the surface of the fabric immediately after the coating work using the fine sprayer (300) and the coating brush (400).
[0067] In particular, the coating film (800) is preferably made of a lint-free or microfiber material with a dense woven structure that does not generate lint. This is to fundamentally prevent fine fiber strands or dust from being mixed in during the drying and forming process of the coating film, thereby physically breaking or damaging the conductive network (electrostatic shielding layer) formed by the fine carbon powder.
[0068] The coating cloth (800) having the configuration described above complements the physical limitations of the coating brush (400), helps the coating liquid adhere uniformly even in curved or narrow gap areas, and provides an excellent effect of maximizing the aesthetic satisfaction of the restored bag to the level of a new product.
[0070] A multi-mode coating using a carbon-containing water-dispersible polyurethane antistatic coating composition (10) according to one embodiment of the present invention having the configuration described above may include a first mode and a second mode.
[0071] Multi-mode coating supports actively varying the penetration and coating methods according to the fabric material of the target precision measuring instrument protective bag by adjusting the mixing ratio using a metering dilution container (200), and provides flexible applicability that can cover all types of bag fabrics with a single product family of coating liquids.
[0072] The first mode is a fiber-specific low-concentration penetration coating method that, when the fabric material is a textile fiber, lowers the dilution concentration of the coating solution to increase the fluidity of the liquid and maximizes the liquid penetration power into the internal pores of the fabric, thereby densely strengthening the internal bonds between the fiber strands.
[0073] The second mode is a high-concentration film coating method that forms a sturdy external protective layer defending against external contamination and scratches by maximizing the bonding strength and film-forming ability of the fabric surface through a relatively higher dilution concentration of the coating solution, reflecting the characteristic of low surface porosity when the fabric material is polyurethane (PU), polyvinyl chloride (PVC), or synthetic leather.
[0074] A multi-mode coating according to one embodiment of the present invention having the configuration described above enables optimal restoration and protection performance on both fabric and synthetic leather materials, which have completely different physical properties, solely through a precise dilution ratio control mechanism with water without complex additional chemical additives, thereby significantly improving the commercial viability and economic efficiency of the product.
[0076] FIG. 2 is a flowchart illustrating a coating method using a carbon-containing water-dispersible polyurethane antistatic coating composition according to one embodiment of the present invention.
[0077] Referring to FIG. 2, a coating method using a carbon-containing water-dispersible polyurethane antistatic coating composition according to one embodiment of the present invention comprises a coating liquid metering step (S110), a coating liquid dilution step (S120), a sprayer preparation step (S130), a coating liquid spraying step (S140), a coating liquid application step (S150), and a coating drying finishing step (S160).
[0078] The coating solution metering step (S110) is a step of preparing by taking out the coating solution concentrate container (100), the metering dilution container (200), and the kit manual (700) from the storage case (500). First, the user refers to the kit manual (700) to determine the fabric material (textile, polyurethane, synthetic leather, etc.) and the degree of aging of the target precision measuring instrument protective bag. Afterward, the coating solution concentrate container (100) is opened, and the concentrate containing water-dispersible polyurethane (PUD), fine carbon powder, and natural black pigment is poured into the metering dilution container (200). At this time, the exact volume of concentrate required for the work area is visually confirmed and precisely measured through the precision metering scale provided on the outer surface of the metering dilution container (200).
[0079] The coating solution dilution step (S120) is a step in which a diluent (water) is added to the measured concentrate to form a mixture at an optimal concentration. In this step, a multi-mode coating mixture tailored to the target fabric is performed. If the fabric is a textile fiber, it is diluted in a first mode by increasing the proportion of water to lower the concentration in order to maximize penetration into the internal pores of the fabric. On the other hand, if the material is polyurethane (PU) or synthetic leather, it is mixed in a second mode by increasing the proportion of the concentrate to maximize surface film formation. The mixture is shaken and stirred sufficiently inside a measuring dilution container (200) to ensure that the concentrate and water are completely mixed.
[0080] The sprayer preparation step (S130) is a step of preparing for the full-scale spraying operation by transferring the diluted customized coating solution into a fine sprayer (300). The mixed coating solution is poured into the container of the fine sprayer (300), and the pump head is securely fastened. At the same time, a pre-cleaning operation is performed by lightly wiping away dust or contaminants from the surface of the bag to be coated using a coating cloth (800), thereby creating an optimal condition for the coating solution to adhere perfectly to the surface.
[0081] The coating liquid spraying step (S140) is a step of positioning a prepared micro sprayer (300) over the area of the bag to be restored and spraying the coating liquid through a pumping action. The micro sprayer (300) atomizes the coating liquid to help it reach the surface of the fabric widely and evenly without the liquid clumping thickly or running down. For areas where whitening is severe or discolored due to aging, the liquid is sprayed over a certain distance to ensure that the pigment is sufficiently applied.
[0082] The coating liquid application step (S150) is a key step in which sprayed coating liquid droplets are evenly spread onto the surface of the fabric and into the micropores using an application brush (400). A flat-shaped application brush (400) made of natural bristles is lightly held and rubbed back and forth along the grain of the fabric. Through this physical brushing process, micro-sized fine carbon powder penetrates deep into the fabric structure to stably form a continuous conductive network (electrostatic shielding layer), while at the same time, natural black pigment naturally conceals scratches and discoloration.
[0083] Here, another embodiment of the coating liquid application step (S150) can be performed in a mechanical and automated manner using an automatic application device (600) described later. Instead of the user manually operating the application brush (400), the coating liquid application process proceeds systematically by operating the automatic application device (600) after firmly mounting the installation frame (601) along the edge of the original surface of the precision measuring instrument protection bag.
[0084] Specifically, at this stage, the automatic dispensing device (600) covers the entire area of the bag surface without any dead zones by smoothly sliding the slider (604) along the first rail (602) and the second rail (603) in the forward, backward, left, and right directions (XY axis direction). At this time, the pressure lifting cylinder (605) expands and contracts in accordance with the thickness or texture of the fabric, thereby precisely controlling the vertical contact pressure applied to the fabric surface by the porous dispensing pad (615) attached to the bottom according to the situation.
[0085] In particular, during the coating process, the operation of the rotary drive motor (606) and the eccentric rotation plate (607) causes the porous coating pad (615) to move in an irregular elliptical trajectory while in close contact with the surface of the fabric, generating a multi-directional friction effect similar to rubbing with a human hand. Independently, the disc rotation drive unit (610) actively rotates the rotating disc (609) to generate additional spin friction force, thereby effectively untangling the fiber tissue. Through this XY-axis sliding and composite eccentric rotation mechanism, micro-unit carbon powder within the coating liquid is evenly and forcibly penetrated deep into the micropores of the fabric without leaving mechanical marks.
[0086] In addition, if the coating liquid on the surface of the fabric dries prematurely due to continuous frictional heat during the application process, additional coating liquid is immediately sprayed onto the target area from the auxiliary spray nozzle (611) exposed through the opening of the rotating disc (609) to prevent frictional damage and maintain an optimal moist application environment.
[0087] As a result, another embodiment of the coating liquid application step (S150) utilizing an automatic application device (600) not only significantly reduces physical fatigue of the user when working on a large bag area, but also provides an excellent effect of mechanically controlling the variation in coating film thickness that may inevitably occur during manual work, thereby achieving consistent and perfect electrostatic shielding performance and moisture-proof film as if worked by a professional.
[0088] The coating drying finishing step (S160) is a step in which, after the work using the application brush (400) is finished, the surface is finally finished using the application cloth (800) and air-dried. The surface of the fabric is lightly buffed with the application cloth (800) to gently wipe away any excess coating liquid or fine brush marks remaining on the surface that have not fully permeated, thereby uniformly flattening the thickness of the coating film. Afterward, it is dried at room temperature in accordance with the natural drying characteristics of the coating liquid. Once drying is complete, the bag can be used immediately while maintaining the original flexibility of the fabric, and the moisture-proof and anti-static functions (10^5 to 10^9 Ω / sq) are perfectly restored, and the entire process is completed.
[0090] FIG. 3 is a drawing showing another embodiment of a carbon-containing water-dispersible polyurethane antistatic coating composition according to the present invention.
[0091] Referring to FIG. 3, a carbon-containing water-dispersible polyurethane antistatic coating composition (20) according to another embodiment includes a coating liquid concentrate container (100), a metering dilution container (200), a fine sprayer (300), a brush for application (400), a storage case (500), and an automatic application device (600).
[0092] Here, the coating liquid concentrate container (100), metering dilution container (200), fine sprayer (300), application brush (400), and storage case (500) are identical to the components of FIG. 1, so their descriptions are omitted to avoid duplication of descriptions.
[0093] The automatic coating device (600) is attached to a precision measuring instrument protective bag and performs the function of automatically rubbing the coating liquid sprayed onto the surface of the fabric to apply it uniformly, and helps to ensure consistent quality even during large-area work by mechanically controlling the variation in coating film thickness that may occur due to manual work.
[0094] A carbon-containing water-dispersible polyurethane antistatic coating composition (20) according to another embodiment having the composition described above can significantly reduce user fatigue and force the coating liquid to penetrate deep into the fabric at a constant pressure, thereby providing an excellent effect of maximizing the uniformity of moisture resistance and electrostatic shielding performance to a professional level.
[0096] Figure 4 is a drawing showing the automatic dispensing device of Figure 3.
[0097] Referring to FIG. 4, the automatic dispensing device (600) includes an installation frame (601), a first rail (602), a second rail (603), a slider (604), a pressurized lifting cylinder (605), a rotary drive motor (606), an eccentric rotating plate (607), an installation groove (608), a rotating disc (609), a disc rotation driving unit (610), an auxiliary spray nozzle (611), and a variable dispensing unit (612).
[0098] The installation frame (601) is firmly installed along each edge of the original surface of the precision measuring instrument protection bag (1) to which the coating liquid is to be applied, providing a stable overall support base that allows automatic application mechanisms to move.
[0099] Meanwhile, the above-mentioned installation frame (601) can be provided with a modular clamp structure that can be selectively attached to and adjusted in size on the edge of the bag, so that it can be universally applied to various sizes of precision measuring instrument protection bags (1) and at the same time increase the convenience of the worker.
[0100] As a specific embodiment, the lower ends of the four vertical supports supporting the installation frame (601) are each provided with a 'detachable clamping part' that is connected to and separated from the upper aluminum rim or corner guard of the precision measuring instrument protection bag (1) by a press fit or pressure method.
[0101] The above detachable clamping part may be configured to include a 'C' or 'L' shaped fixing bracket that wraps around and settles the outer edge of the bag (1), and a tightening dial (or quick release lever) that penetrates the outer side of the fixing bracket and is screw-coupled, and generates a fixing force by strongly pressing the side of the edge according to the rotation operation of the operator.
[0102] At this time, it is preferable to attach an elastic friction pad made of rubber, urethane, or silicone material to the surface that comes into direct contact with the edge of the bag (1) on the inner side of the fixed bracket. This not only fundamentally prevents the expensive bag aluminum frame or fabric from being crushed or scratched due to the pressure of the tightening dial, but also simultaneously performs the role of a damper that absorbs fine vibrations of the equipment generated during the coating process.
[0103] Additionally, the horizontal rail members constituting the horizontal and vertical lengths of the installation frame (601) may be formed of a sliding double-tube structure or an aluminum profile assembly structure that is inserted and externally inserted so as to be extended or shortened to match the horizontal and vertical lengths of the precision measuring instrument protection bag (1).
[0104] This detachable and variable configuration helps the worker to immediately assemble the installation frame (601) to the specifications of the target bag (1) at the site and securely fasten it without the need for separate hand tools. Furthermore, it provides maximized field usability by supporting strong lateral vibrations caused by the complex eccentric rotation and sliding of the variable coating part (612) during coating application without shaking, thereby perfectly ensuring uniformity of the coating film thickness, and allowing the clamp to be quickly released and compactly separated for storage in the storage case (500) after the work is finished.
[0105] The first rail (602) is formed to extend long in the forward and backward direction along one side and the other side of the installation frame (601) and smoothly and stably guides the forward and backward movement path of the second rail (603) to be described later.
[0106] The second rail (603) is connected so that one side and the other side can slide along the first rail (602) in the forward and backward directions, thereby granting the coating module a wide degree of freedom of movement in the X-axis direction.
[0107] The slider (604) slides smoothly in the left and right directions along the second rail (603) and forms a movement trajectory in the Y-axis direction, helping to cover the entire area of the bag surface without any dead zones.
[0108] The pressure lifting cylinder (605) is installed upright on the lower side of the slider (604) and drives to expand and contract according to the thickness or texture of the fabric, thereby precisely controlling the vertical contact pressure applied by the coating units coupled to the lower side to the fabric surface (1a) according to the situation.
[0109] The rotary drive motor (606) is installed on the lower side of the pressurized lifting cylinder (605) and transmits a strong and continuous rotational driving force to the lower eccentric rotating plate (607) to generate the main power for the coating operation.
[0110] The eccentric rotating plate (607) is formed in the shape of a circular flat plate and is installed by axial coupling to the drive shaft of the rotary drive motor (606), but the drive shaft of the rotary drive motor (606) is installed eccentrically from the center and rotates in an irregular elliptical trajectory while in close contact with the original surface (1a), thereby generating a multi-directional friction effect similar to rubbing with a human hand.
[0111] The installation groove (608) is formed by spatially recessing the bottom surface of the eccentric rotating plate (607) that is seated on the original surface (1a), providing a space in which the rotating disc (609) and various internal parts can be embedded and mounted without interference.
[0112] The rotating disc (609) is formed in the shape of a circular flat plate with an opening in the center and is installed to be rotatable inside the installation groove (608), and serves as a base that directly supports the variable coating part (612) at the bottom.
[0113] The disc rotation drive unit (610) actively rotates the disc (609) in the forward or reverse direction to generate an additional independent spin friction force distinct from eccentric rotation, thereby effectively untangling the tangled fiber tissue.
[0114] The auxiliary spray nozzle (611) is installed inside the installation groove (608) and is exposed downward through the central opening of the rotating disc (609), spraying additional coating liquid onto the original surface (1a) where the coating process is performed to prevent the liquid from drying prematurely due to frictional heat.
[0115] The variable coating unit (612) is installed on the lower side of the rotating disc (609) and rotates while in perfect contact with the original surface (1a), spreading the coating liquid evenly deep into the fine pores of the original surface (1a) to complete the functional coating film without gaps.
[0116] An automatic coating device (600) according to one embodiment of the present invention having the configuration described above provides an optimal friction mechanism that combines a linear movement XY-axis sliding structure and an irregular rotation structure using an eccentric motor to induce carbon powder to penetrate uniformly between fabric fibers and form a perfect conductive network without leaving mechanical marks.
[0118] Figures 5 and 6 are drawings showing the variable coating portion of Figure 4.
[0119] Referring to FIGS. 5 and 6, the variable coating unit (612) includes a guide outer wall (613), a guide inner wall (614), a porous coating pad (615), a hollow groove (616), a first guide tube (617), a second guide tube (618), a first vertical lifting rail (619), a second vertical lifting rail (620), a lifting compression ring (621), a first link frame (622), a second link frame (623), a foldable pressure link (624), a compression drive ring (625), a compression drive cam (626), a cam follower (627), and a ring rotation drive unit (628).
[0120] The guide outer wall (613) is installed in a cylindrical pipe shape along the lower edge of the rotating disc (609) and serves as an outer housing that safely protects the internal lifting parts from external impact and contaminants.
[0121] The guide inner wall (614) is spaced apart from the guide outer wall (613) in the direction of the center of the rotating disc (609) and installed in a cylindrical pipe shape along the lower side of the rotating disc (609) to partition an independent annular space inside to accommodate a porous coating pad (615).
[0122] The porous coating pad (615) is installed so as to be exposed to the lower side of the space between the guide outer wall (613) and the guide inner wall (614), and rotates while in close contact with the original surface (1a) while containing fine pores, so as to gently rub and absorb the coating liquid onto the original surface (1a) and apply it without scratching.
[0123] The hollow groove (616) is formed to extend inward along the upper side of the porous coating pad (615) so that the bottom surface of the rotating disc (609) is exposed, thereby securing a driving clearance that allows the pressure link and cam structure to move up and down without physical interference.
[0124] The first guide tube (617) is formed in the shape of a cylindrical pipe installed along the outer surface of the hollow groove (616) and provides an outer reference guide surface so that the lifting compression ring (621) can descend without error.
[0125] The second guide tube (618) is formed in the shape of a cylindrical pipe installed along the inner surface of the hollow groove (616) and provides an inner reference guide surface of the lifting compression ring (621) to balance the lifting motion.
[0126] The first vertical lifting rail (619) is installed upright at regular intervals along the inner surface of the first guide tube (617), thereby precisely ensuring the straightness of the outer downward path of the lifting compression ring (621).
[0127] The second vertical lifting rail (620) is installed upright at regular intervals along the outer surface of the second guide tube (618) so that the lifting compression ring (621) is guided to descend smoothly while maintaining a horizontal position.
[0128] The lifting compression ring (621) is formed in a donut-shaped circular flat plate shape corresponding to the shape of the space between the first guide tube (617) and the second guide tube (618), is guided to the first vertical lifting rail (619) and the second vertical lifting rail (620), moves up and down between the first guide tube (617) and the second guide tube (618), and transmits physical pressure to the link structure.
[0129] The foldable pressure link (624) is configured such that the first link frame (622), which is connected to the lower side of the guide outer wall (613), and the second link frame (623), which is connected to the lower side of the guide inner wall (614), are connected and arranged so that they can be folded in an S shape. As the lifting compression ring (621) descends, the first link frame (622) and the second link frame (623) spread out widely to form a straight line, thereby expanding and compressing the porous coating pad (615) located below it to adhere even more strongly to the original surface (1a).
[0130] The compression drive ring (625) is formed in the shape of a circular ring and is connected and installed so as to rotate independently along the bottom surface of the rotating disc (609) to form a continuous trajectory plate for cam operation.
[0131] A plurality of compression drive cams (626) are spaced apart along the lower side of the compression drive ring (625) and rotate together with the compression drive ring (625) to generate sequential compression force for each part of the porous coating pad (615).
[0132] A number of cam followers (627) are spaced apart along the upper side of the lifting compression ring (621) and serve as a key mechanical medium that converts horizontal rotational motion into vertical compression motion by periodically pushing downwards by the bending of the compression drive cam (626) to move the lifting compression ring (621) downwards.
[0133] The ring rotation drive unit (628) rotates the compression drive ring (625) to apply power so that the user can electrically control the tapping cycle and pressure intensity of the porous coating pad (615) according to the degree of damage or material characteristics of the bag fabric.
[0134] A variable coating unit (612) according to one embodiment of the present invention having the configuration described above exhibits an advanced effect of completing a zero-defect electrostatic shielding layer by perfectly penetrating PUD particles into the fabric without clumping of the coating liquid, even in difficult areas such as corners of a bag, by exquisitely combining a cam drive and a foldable link structure to variably control the adhesion strength and vibration of the coating pad in real time.
[0136] Referring to FIGS. 5 and FIGS. 6, the specific operating mechanism of the coating liquid application by the variable application unit (612) is described as follows.
[0137] First, when the coating liquid application process begins, the variable application unit (612) is installed on the lower side of the rotating disc (609) and is in perfect contact with the original surface (1a) to begin rotational movement. At this time, the porous application pad (615) performs the role of primarily spreading the sprayed coating liquid by gently rubbing the original surface (1a) while holding fine pores.
[0138] Simultaneously with this basic rotation, the ring rotation drive unit (628) operates to independently rotate the compression drive ring (625). As the compression drive ring (625) rotates, the compression drive cam (626), which is installed at regular intervals on the lower side, rotates together with it, and the curved surface of the compression drive cam (626) periodically pushes the cam follower (627) downward.
[0139] As the cam follower (627) descends, the lifting compression ring (621) coupled thereto descends under the precise guidance of the first vertical lifting rail (619) and the second vertical lifting rail (620). When the lifting compression ring (621) descends, the first link frame (622) and the second link frame (623) of the foldable pressure link (624), which were waiting folded into an "S" shape at the bottom, are subjected to pressure and spread out widely to form a straight line.
[0140] The expansion force generated as the foldable pressure link (624) unfolds in this manner strongly compresses the porous coating pad (615) located at the bottom vertically downward, and as a result, causes the porous coating pad (615) to adhere even more strongly to the original surface (1a). That is, the horizontal rotational movement is converted into a periodic vertical compression movement (tapping), thereby variably controlling the adhesion strength and physical vibration of the coating pad in real time.
[0141] Meanwhile, as the porous coating pad (615) repeatedly undergoes continuous friction and strong vertical compression to forcibly penetrate the coating liquid, frictional heat is inevitably generated on the surface of the fabric, which may cause the coating liquid to dry out prematurely.
[0142] To prevent such problems, an auxiliary spray nozzle (611) installed inside the installation groove (608) and exposed through the central opening of the rotating disc (609) operates in conjunction. The auxiliary spray nozzle (611) immediately sprays additional coating liquid into the center of the original surface (1a) where the coating process is performed to replenish moisture, thereby preventing physical damage to the original surface due to excessive friction and continuously maintaining an optimal moist coating environment where coating liquid particles can penetrate smoothly.
[0143] As a result, the periodic forced compression application mechanism through the cam and foldable link structure of the variable application unit (612) and the real-time coating liquid replenishment mechanism of the auxiliary spray nozzle (611) are organically combined, thereby producing an advanced effect of perfectly penetrating water-dispersible polyurethane (PUD) and fine carbon powder particles deep inside the micropores of the fabric without clumping of the coating liquid, even in difficult areas such as the corners of a bag that are curved or have steps, thereby completing a defect-free electrostatic shielding layer.
[0145] The embodiments described above are for illustrative purposes only, and those skilled in the art will understand that the embodiments described above can be easily modified into other specific forms without altering the technical concept or essential features of the embodiments described above. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. For example, each component described as a single unit may be implemented in a distributed manner, and components described as distributed may likewise be implemented in a combined form.
[0147] The scope of protection sought through this specification is defined by the claims set forth below rather than by the detailed description above, and should be interpreted to include all modifications or variations derived from the meaning and scope of the claims and the concept of equivalents. Explanation of the symbols
[0149] 10, 20: Carbon-containing water-dispersible polyurethane antistatic coating composition 100: Container of undiluted coating solution 200: Metering dilution container 300: Fine mist sprayer 400: Application brush 500: Storage case 600: Automatic dispensing device
Claims
Claim 1 A coating solution concentrate container for forming an electrostatic shielding layer by restoring the fabric of a precision measuring instrument protective bag and reducing surface resistance; a metering dilution container equipped with a metering scale so that the user can directly adjust the concentration of the coating solution according to the fabric condition of the precision measuring instrument protective bag; and a fine sprayer for receiving the coating solution diluted from the metering dilution container and spraying it onto a target area of the precision measuring instrument protective bag; a flat-shaped application brush made of natural bristles to minimize hair marks and form a uniform coating film in accordance with the natural drying characteristics of the coating solution; and a storage case with a hard case structure that protects the interior from external impact and has multiple mounting grooves formed by custom-cut high-density foam inside for mounting components.It further comprises, wherein the coating solution is a composition in which fine carbon powder and natural black pigment are dispersed using water-dispersible polyurethane (PUD) as a base, and the fine carbon powder penetrates the surface and micropores of the precision instrument protective bag fabric upon application to form a continuous conductive network, thereby reducing the surface resistance value of the precision instrument protective bag fabric to the anti-static standard range of 10^5 to 10^9 Ω / sq to form an electrostatic shielding layer, and the coating solution supports multi-mode coating that varies the penetration and coating methods according to the fabric material of the target precision instrument protective bag by adjusting the mixing ratio using the metering dilution container, and the multi-mode coating includes a first mode that strengthens internal bonding by maximizing liquid penetration into the internal pores of the fabric by lowering the dilution concentration of the coating solution when the fabric material is textile fiber, and a dilution of the coating solution when the fabric material is polyurethane (PU), polyvinyl chloride (PVC), or synthetic leather A carbon-containing water-dispersible polyurethane antistatic coating composition in which a fabric-customized coating is performed according to the user's selection, including a second mode for forming an external protective layer by maximizing the bonding strength and film-forming ability of the fabric surface by increasing the concentration. Claim 2 delete Claim 3 A carbon-containing water-dispersible polyurethane antistatic coating composition according to claim 1, wherein the metering dilution container is formed of a transparent or translucent material that allows the level of the internal contents to be visually identified, and the outer surface is equipped with a precision metering scale for numerically verifying the input volume of the coating liquid and the dilution liquid (water); through the precision metering scale, a high-concentration formulation with a higher ratio of the coating liquid concentrate is induced for areas where the fabric of the precision measuring instrument protection bag is extremely aged or severely damaged, and a low-concentration formulation with a lower ratio of the concentrate is induced for general surface maintenance areas, thereby allowing the user to intuitively adjust the mixing ratio according to the degree of fabric damage on-site; and when performing a large-area repetitive coating operation requiring the manufacture of additional coating liquid, the dilution process can be reproduced under the same conditions as the previous operation through the mixing ratio quantified on the precision metering scale, thereby preventing deviations in coating quality, including the thickness of the coating film, electrostatic shielding rate, and drying speed, across the entire coating area and maintaining the same quality.
Citation Information
Patent Citations
Looks press packed bale with antistatic function
CN205993849U
Wood graining process and kit
US20040115350A1