JP2006142292A - Coating method of tile and tile having surface coated with silver powder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coating method using a synthetic resin mixed with silver powder via ultrasonic waves in which a phenomenon that nano-silver particles are crushed in a process for mixing them with the resin comprising a thermoplastic resin is prevented, in which the nano-silver particles having higher specific gravity than the resin comprising the thermoplastic resin are prevented from precipitating and in which time required to mix the nano-silver particles with the resin comprising the thermoplastic resin by ultrasonic dispersion is reduced through a dilution process. <P>SOLUTION: The coating method using the synthetic resin mixed with the silver powder via ultrasonic wave comprises a mixing process in which the resin comprising the thermoplastic resin is mixed with nano-silver powder by dispersion using a ultrasonic distributor to prepare a mixture, a pumping process in which the mixture is periodically pumped in order to prevent precipitation of the nano-silver powder out of the mixture after the mixing process due to the difference in specific gravity between the nano-silver powder and the resin comprising the thermoplastic resin and a coating process in which the mixture after the pumping process is applied onto a surface of a tile. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a tile coating method for coating a silver powder mixed synthetic resin manufactured using ultrasonic waves. More specifically, the process of mixing nanosilver with a resin to which a thermoplastic material is added is performed by an ultrasonic dispersion method. The present invention relates to a method for coating a tile. The present invention further relates to a tile coated with a silver dust mixed synthetic resin by this tile coating method.

  As industrialization progresses, interest in health is increasing due to the sequelae of industrialization. In general, silver has treasure value, but in modern times it is environmentally friendly, non-toxic when used in small quantities, combined performance such as antibacterial, bactericidal, antifungal, deodorizing, far-infrared emission and electromagnetic wave shielding In addition, it is a material that has a long-lasting performance and is beneficial to the human body and the natural environment. Due to the characteristics of silver, silver has recently been used in the manufacture of home appliances, cosmetics, bottom materials and the like.

  There are two methods for applying such silver to daily products. Among them, the first method is a method of impregnating the inner surface of the product with silver powder, and the second method is a method of coating the surface of the product with silver powder.

  In the case of the first method in which the inner surface of the product is impregnated with silver, the silver component does not flow out to the outside, but the function of silver is not exposed to the outside. Two methods are common.

  As a technique for coating silver on the surface of a product, there is a technique disclosed in Patent Document 1. This Patent Document 1 discloses a composition comprising a hot melt polyurethane resin and nano- or micronized silver particles. Of the entire film composition, the content of hot-melt polyurethane is 70 to 98% by weight, silver The content of the particle colloid is 20 to 200 ppm. When this is coated on the product surface, it is environmentally friendly and harmless to the human body. However, when the nano silver powder is mixed with the hot melt polyurethane resin, the silver powder component and the hot melt polyurethane resin are not uniformly mixed. Therefore, when the composition is coated on the surface of the product, the silver component is not on the surface of the product. There is a problem that it is not uniformly coated.

Patent Document 2 discloses a technique for ultrasonically dispersing and mixing an organosilicon compound with a filler and a solvent. However, in Patent Document 2, there is a difference in specific gravity between the solvent and the organosilicon compound. Thus, there is a problem that the problem that the organosilicon compound is precipitated cannot be solved. Moreover, in the case of the said patent document 2, in order to mix an organosilicon mixture and a solvent uniformly, there existed a problem which requires a separate filler.
Republic of Korea Published Patent No. 2003-0036490 Korean Published Patent No. 2002-0028026

  The present invention has been made in view of such problems. An object of the present invention is to prevent a phenomenon in which nano silver particles are destroyed during the process of adding and mixing nano silver powder to a resin to which a thermoplastic material is added.

  The present invention also prevents precipitation of nanosilver particles having a specific gravity higher than that of a resin to which a thermoplastic material is added in a mixture in which a resin to which a thermoplastic material is added and nanosilver are mixed by ultrasonic dispersion. For other purposes.

  Another object of the present invention is to shorten the mixing time for mixing the resin to which the thermoplastic material is added and nano silver by ultrasonic dispersion by providing a dilution process.

  In order to solve the above-mentioned problems, according to one aspect of the present invention, a mixing process of forming a mixture by dispersing and mixing nano silver powder with a resin added with a thermoplastic material using an ultrasonic disperser; In order to prevent the nanosilver from precipitating due to the difference in specific gravity between the nanosilver powder that has undergone the process and the resin to which the thermoplastic material is added, the pumping process that periodically pumps and the mixture that has undergone the pumping process are mixed with the tile surface. There is provided a method for coating a tile, characterized in that it comprises a coating process.

  The mixing ratio of the nanosilver and the resin to which the thermoplastic material is added is preferably about 1: 500 in weight ratio.

  The method further includes a dilution process of adding 5 times by weight a resin added with the same thermoplastic material used in the mixing process to the mixture formed by the mixing process before the pumping process. (Claim 3).

  In the resin to which the thermoplastic material is added, it is desirable that the thermoplastic material is 30 to 35% by weight and the resin is 65 to 70% by weight.

  The thermoplastic material is preferably any one of acrylic, vinyl, PVC, and UV coating liquid.

  According to the present invention as described above, first, nanosilver particles are destroyed by performing a process of adding and dispersing and mixing nanosilver to a resin to which a thermoplastic material is added, using an ultrasonic dispersing device. When preventing the phenomenon and coating the product surface, the unique functions of nano silver can be maximized.

  Second, the phenomenon that nano silver particles are precipitated due to the difference in specific gravity between the resin added with a thermoplastic material and the nano silver particles, which is a problem when the mixture mixed by ultrasonic dispersion is coated on the product surface for a long period of time. Can be prevented by periodically circulating (pumping) with a circulation pump.

  Thirdly, generally, when mixing resin and nano silver particles by ultrasonic dispersion, a considerable amount of work time is required.In the present invention, first, after mixing the resin and nano silver particles with an ultrasonic disperser, Furthermore, there is an effect that the ultrasonic dispersion treatment time can be shortened by further adding and diluting a resin of the same material as the resin to which the thermoplastic material to be subjected to ultrasonic treatment is added 5 times by weight.

  Fourthly, the present invention can give a three-dimensional effect to the surface of the tile, shield static electricity and electromagnetic waves generated from the surface of the tile, and maximize the antibacterial effect.

  The production method of the present invention includes UV coating, PVC top coating, floor finish, wallpaper, clothes, textile, PU, PP, ABS, wood (MDF), HDF, wrapping paper, transfer paper, textile transfer, interior film Although it can be applied to sheets and plastics, the preferred embodiment of the present invention will be described in detail by applying to tiles.

  According to the present invention, the coated tile is periodically mixed to form a mixture by ultrasonically dispersing nanosilver powder and resin with an ultrasonic disperser, and to prevent the phenomenon of nanosilver precipitation. The method includes a pumping process for pumping and a coating process for coating the tile surface with the mixture supplied by the pumping process. The coating is desirably performed by a method in which the mixture is placed in a T-die and passed through a pair of compression rollers.

  In the present invention, in the process of mixing nanosilver with a resin to which a thermoplastic material is added, the solvent is defined as a resin to which a thermoplastic material is added, and the solute is defined as nanosilver particles. As the nano silver, a product of NTBase Co., Ltd. can be used. This nano silver is a fine one having a size of 50 nm or less, and has the product characteristics shown in Table 1.

  The resin is preferably a resin produced in nature, not a chemically synthesized resin, and is preferably non-crystalline or non-volatile, soluble in alcohol or ether, but insoluble in water. Can be used. In the present invention, a thermoplastic material is added to the resin. As the thermoplastic material, it is desirable to use any one selected from acrylic, vinyl, PVC, and UV coating liquid.

  As described above, in the resin to which the thermoplastic material is added, the concentration of the thermoplastic material is preferably 30 to 35% by weight. When the concentration is 30% or less, there is a problem that the viscosity is too low to easily peel off from the tile surface. When the concentration is 35% or more, the viscosity is too high to coat the tile surface. This is because there is a problem that becomes difficult.

  As described above, nano silver and thermoplastic resin added are ultrasonically dispersed and mixed with an ultrasonic disperser, compared to the conventional case where nano silver particles and resin are physically mixed. Since the fine powder is not destroyed, the unique function of nano silver can be exhibited.

  After passing through the mixing process, the mixture is periodically circulated by a pump for a period of time (pumping) in order to prevent a phenomenon that nanosilver is precipitated due to a difference in specific gravity between the nanosilver particles and the resin added with the thermoplastic material. Is desirable. In the present invention, as a pumping device used to prevent the phenomenon of nanosilver precipitation, a circulation pump normally used in the industrial field is used, and the cycle of operation of the circulation pump is nanosilver powder and thermoplasticity. Although it varies depending on the amount of resin to which the material is added, it is usually operated with a circulation pump for 5 to 20 minutes.

  In the present invention, an ultrasonic dispersion device for mixing nanosilver powder and resin is an apparatus that uses ultrasonic waves to be ejected. This apparatus is disclosed in Korean Patent No. 10-357638. For example, a nano silver powder and a resin with a thermoplastic material added are dispersed with an ultrasonic disperser at room temperature (25 ° C.) and atmospheric pressure (1 atm), and dispersed with an ultrasonic disperser and coated on the tile surface. The conditions for this are normal temperature (25 ° C.) and atmospheric pressure (1 atm). The pump is preferably circulated for about 5 minutes after mixing for 1 hour with an ultrasonic disperser.

As mentioned above, if the tile surface is coated with a mixture of nano-silver mixed with a resin added with thermoplastic material by ultrasonic dispersion mixing process, electrostatic attenuation, electromagnetic shielding, surface sterilization, antibacterial, and deodorizing functions can be demonstrated. It is. When the surface of the tile was coated with a mixture in which nano silver was mixed by an ultrasonic dispersion mixing process on a resin to which a thermoplastic material was added, and the electrical resistance of the surface was measured, the surface resistance was 10 ³ to Since it was 10 ¹³ Ω / cm ² , it was found that it was effective in preventing static electricity.

  In addition, in order to reduce the working time of the ultrasonic dispersion mixing process, first, a mixture of a resin added with a thermoplastic material and nano silver is ultrasonically dispersed at a weight ratio of about 500: 1, and then the pumping process is performed. It is desirable to add and dilute the same resin as that used in the ultrasonic dispersion process 5 times as much as the resin and nanosilver mixture before.

  Therefore, the mixing ratio of the nano silver and the resin to which the thermoplastic material is added is preferably about 1: 2500 by weight. According to the ultrasonic dispersion mixing according to the present invention, the nanosilver fine powder is not destroyed, and the nanosilver is uniformly mixed in the resin. it can.

  An antibacterial experiment on tiles manufactured by the coating method of the present invention was conducted at the Korea Chemical Research Institute as follows.

1. Antibacterial experiment method (1) Experimental equipment: Clean Bench (SAMKI TECH, Republic of Korea)
Colony Counter (Tokutomo Chemical, South Korea)
Incubator (Memmert, Germany)
(2) Test strain: EScherichia coli ATCC 25922
Staphylococcus aureus ATCC 6538

(3) Test method After culturing the bacteria, the bacteria were diluted with an agar medium diluted 20 times so as to be 1 to 5 × 10 ⁵ cells / ml and used as an inoculum. Each sample is put in a sterilized petri, and 0.4 ml of the inoculum is inoculated on the sample. The sample is covered with a covering film, and then incubated at 35 ° C. for 24 hours. The bacteria adhering to the sample and the coating film were sufficiently washed out in the Petri dish by neutralization, and the number of bacteria was measured from the washed solution. The coating film used was a Stomacher 400 poly sterilization bag. The number of bacteria was calculated by multiplying the number of bacteria on the medium by the dilution factor.
2. Results of antibacterial experiment (unit: pieces / sample)

3. Experimental Results The test samples showed a high decrease rate of 99.9% or more after 24 hours against the gram-negative bacterium O. and S. aureus. That is, when the synthetic resin containing nano silver by ultrasonic dispersion of the present invention is coated on the tile surface, after 24 hours elapses against the gram-negative bacterium, gonococcus and gram-positive bacterium, Staphylococcus aureus, It has the effect of reducing 99.9% or more.

Further, when silver powder is included on the tile surface or the tile inner surface by a conventional method, the surface resistance is 10 ¹³ to 10 ¹⁵ Ω / cm ² , but the tile is coated by the coating method according to the present invention. In this case, since the surface resistance is 10 ³ to 10 ¹¹ Ω / cm ² , there is an excellent effect in preventing static electricity.

  The tile surface is preferably coated by the method of the present invention as described above. However, a desirable tile as used in the present invention is a gravure printing process of 5 degrees or more in order to express the three-dimensional feeling of the carpet. It is manufactured through. More specifically, the gravure printing process is performed five times or more in order to express the three-dimensional feeling of the carpet, the portion where the overlapping pattern is printed is a blank portion, and the hair pattern portion is expressed to express individual hair. Printing, printing a duplicate pattern part on the blank part of the hair pattern part, printing a hair pattern part on the duplicate pattern part, and printing a complementary pattern part to make use of the three-dimensional effect (printing film) Using the printing film produced in the production stage), a number of interleaving paper sets in which the lower film, the intermediate film, the printing film, the transparent film, and the embossed pattern for the unevenness of the carpet are sequentially laminated are stacked and pressed. It is manufactured by a construction method including an interleaf sheet stage.

  Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

  In FIG. 1 and FIG. 2, the manufacturing process (S10) of the printing film which comprises the core of this invention consists of using a gravure printing method. Gravure printing is a type of intaglio printing, and the outline of intaglio printing is as follows. Intaglio printing has a lower printing plate surface area than the printing plate surface, and there are engraving intaglio printing and gravure printing as a method of printing with ink accumulated in this portion.

  Engraving intaglio printing is a method of engraving a pattern on a printing plate by hand to make an intaglio, and gravure printing makes a photo or text as a manuscript and creates a corresponding image line with a large number of fine indentations. It is a method to make. Engraving intaglio printing is slow and suitable for low-volume production, but gravure printing is fast and suitable for mass printing. These plate making methods, printing machines, printing inks, and the like are different from each other, and the characteristics and applications of printed matter are also different from each other.

  Engraving intaglio printing is a method of engraving directly on the printing plate material, that is, engraving intaglio using an engraving knife, dry point method of engraving shallowly with a dry point needle, etc. There are etching intaglio plates, such as an etching method and an aquat tint method, in which a plate metal is exposed after the anticorrosion film is scraped using, and a corrosive solution is poured onto the metal to corrode the metal to form an intaglio. Printing by the dry point method gives a printed matter that gives a sharp and firm feeling, and printing by the etching method or the aqua tint method gives a soft feeling, but these two methods may be used in combination.

  In the production of tiles to be coated according to the present invention, it is desirable that the process of producing a printing film undergoes a gravure printing process (S10 in FIG. 1) of 5 degrees or more in order to express the three-dimensional feeling of the carpet. First, as shown in FIG. 1 and FIG. 2, in order to express individual hair while placing a blank portion 31 </ b> A in a portion of a printed film 30 made of a synthetic resin, particularly PVC, on which overlapping patterns are printed. The first hair pattern portion 31 of the hue is printed (S11).

  Next, an overlapping pattern portion 33A having another hue and pattern (for example, a circle, a rectangle, a star shape, an animal shape, a motivated content, a masterpiece) is printed on the blank portion 31A of the hair pattern portion 31 ( S13) Further, the second hair pattern portion 35A is printed on the overlapping pattern portion 33A (S15).

  The terms “first” and “second” in relation to the hair pattern are sections for convenience, and the hair pattern can be printed several times as necessary. For example, as shown in FIG. 2, in the overlapping pattern portion 33A, a portion 33B where two circles overlap can be printed twice in order to more effectively express the fact that the circles overlap. .

  That is, the overlapping portion 33B of the two circles is left empty when the first overlapping pattern portion 33A and the hair pattern portion 35A are printed, and is further overlapped with the overlapping circle portion by the paint and the etching plate whose brightness and saturation are adjusted. The pattern part 33B can be printed, and the hair pattern part 35B can be printed. Such complex multi-stage gravure printing is appropriately selected and used in consideration of efficiency for cost.

  Then, in order to produce carpets that actually provide carpets with different hues and shades of light reflected by light reflections, the complementary pattern is printed on the carpet. (S17). Such complementary pattern portion printing can be repeated two or more times. The printed film 30 completed through such a process is heat-pressed with another film in order to insert the paper on the tile (S20).

  At this time, as shown in FIG. 3, the lower film 10 for protection, the intermediate film 20 for maintaining the tile shape and some buffering effect, the manufactured printing film 30, and the transparency for protecting the printing film Finally, the embossed pattern plate 50 on which irregularities corresponding to the hair pattern of the carpet are formed is used.

  In connection with the slip sheet step (S20), the present invention aims to improve the simplicity and productivity of the process, so that the lower film 10, the intermediate film 20, the printing film 30, the transparent film 40, and the embossed pattern plate. 50 is put into an interleaf sheet and a large number of sheets are stacked and put into a heating press apparatus.

  Furthermore, in order to further increase the productivity, in the present invention, the embossed pattern plate 50 is used in which both sides are unevenly processed, and two adjacent slip sheet sets S share one embossed pattern plate 50. A laminated sheet set S of multiple layers, for example, 5 to 10 sets, can be heated and pressed to form tiles in a tile so as to have a laminated structure symmetrical to the form.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a synthetic resin tile that utilizes the three-dimensional effect of a carpet, and can be applied to a coating method of silver powder mixed synthetic resin using ultrasonic waves that can shield static electricity and electromagnetic waves and achieve an antibacterial effect. is there.

It is process drawing which shows the manufacturing method of the tile by this invention. It is the schematic which shows the manufacturing process of the printing film by this invention. It is sectional drawing which shows the interleaving process of the tile by this invention.

Explanation of symbols

10 Lower film 20 Intermediate film 30 Print film 31, 35A, 35B Hair pattern part 31A Blank part 33A, 33B Duplicate pattern part 40 Transparent film 50 Embossed pattern plate

Claims (8)

A mixing process in which nano silver powder is dispersed and mixed with an ultrasonic dispersing device into a resin to which a thermoplastic material is added, and a mixture is formed,
A pumping process of periodically pumping in order to prevent a phenomenon in which nanosilver is precipitated due to a difference in specific gravity between the nanosilver powder that has undergone the mixing process and a resin to which a thermoplastic material is added,
A coating process for coating the tile surface with the mixture that has undergone the pumping process,
A method of coating a tile, comprising:   The tile coating method according to claim 1, wherein a mixing ratio of the nano silver powder and the resin to which the thermoplastic material is added is about 1: 500 by weight.   Before the pumping process, a dilution process is further performed in which the resin formed by the mixing process is added with a resin added with the same thermoplastic material as that used in the mixing process and diluted by 5 times. The tile coating method according to claim 2, further comprising:   The tile coating method according to claim 1, wherein the resin to which the thermoplastic material is added includes 30 to 35% by weight of thermoplastic material and 65 to 70% by weight of resin.   5. The tile coating method according to claim 1, wherein the thermoplastic material is any one of acrylic, vinyl, PVC, or UV coating liquid. The tile is
In order to express the three-dimensional feeling of the carpet, the gravure printing process is performed five times or more, the portion where the overlapping pattern is printed is set as a blank portion, the hair pattern portion is printed to express individual hair, and the hair Uses a printed film manufactured by a method consisting of a process of printing a duplicate pattern part on the blank part of the pattern part, printing a hair pattern part on the duplicate pattern part, and printing a complementary pattern part to make use of the three-dimensional effect. And
Manufactured by a method comprising an interleaving stage in which a plurality of interleaving paper sheets in which a lower film, an intermediate film, the printing film, a transparent film, and an embossed pattern plate for carpet unevenness are sequentially laminated are pressed. The method for coating a tile according to claim 1.   In the interleaving step, the embossed pattern slab is processed with both sides uneven, and the two interleaving paper sets have a symmetrical laminated structure in a form sharing one embossed pattern stencil. The method for coating a tile according to claim 6. A tile coated by the tile coating method according to any one of claims 1 to 4, wherein the tile surface has an electric resistance of 10 ³ to 10 ¹¹ Ω / cm ^2. Tiles coated on the surface.

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