KR100957049B1 - Cork board and method for preparing the same - Google Patents

Abstract

PURPOSE: A cork board and a manufacturing method thereof are provided to completely remove fine cork dust remaining in a groove formed on the surface of the cork without damaging to the cork, ad to improve values of the cork. CONSTITUTION: A manufacturing method of a cork board includes the following steps: applying a cork object on one side of the both sides of a substrate; brushing and polishing the surface of the cork object; removing fine cork dust by air vacuum adsorption on a plurality of grooves by counter-rotating and rotating of coater; coloring a metaphysical groove through compression and impregnation by a roll coater; and passing the object through an embossing roller.

Description

TECHNICAL FIELD [0001] The present invention relates to a cork board material,

The present invention is advantageous for human health and indoor hygiene by utilizing a multi-functional cork. It is applicable to housing, commercial interior space and various furniture storage space as well as a variety of ultra-modern interior effects as well as hygienic healthy living space and household goods storage space And a method for producing the same.

Cork is a porous cell formed in the epidermis, cortex, primary skin, and secondary skin of the cork oak bark, with about 42 million honeycomb-like porous cells per 1 cm 3, and its chemical composition is cellulosic And is a natural substance containing mostly fatty acids and small amounts of lignin, ash, resin and carbohydrate. The characteristic of a cork made of a porous cell is impermeable, flexible and flexible compartment, and the liquid can not penetrate the aggregate to such an extent that it does not penetrate even 10% diluted boiling hydrochloric acid. It is chemically inert and is not damaged by weak acids, weak bases or most organic solvents. Conventional cork functions have been used for applications such as main water bottle caps, shoeprints, memo pans, bowl rests, marine safety suits, soundproof walls, etc. by utilizing functions of sound insulation, sound absorption, elasticity, heat insulation and flexibility.

The cork wallpaper used in the past has been coated with adhesive on the printed backing paper. The cork wallpaper has been fired by a band knife from a block of a certain size that has been fired by open and compression, and passively stacked a piece of cork veneer (190 mm × 190 mm) After curing, drying and aging, the cork surface was evenly trimmed, cut and packed using a grinding roller with abrasive paper.

The cork wallpaper produced is of natural color and texture. It has some advantages such as high quality, no burning, no toxic gas, but the color of the cork surface is dull brown, the interior is dark and the grooves of cork veneer are so big And it was felt that there was a sense of heterogeneity and frequent tearing of the white paper due to the pattern connection or overlapping and deep grooves caused frequent defects and the production amount was also limited. In addition, the white pigment is applied by using the printing roller, but the amount absorbed by the cork itself is high, but it is not colored in the numerous metaphysical deep grooves of the cork surface, and the natural cork pattern is concealed and the background is dark brown. It is difficult to obtain additional prints. Also, depending on the brownness of the background, it is difficult to print due to poor smoothness on the connection part of the cork pattern and the cork pattern. In the case of using in the room, problems such as frequent cleaning due to continuous extraction of fine cork powder There was an inconvenience.

Conventional furniture storage materials have a harmful odor, a dull texture, and a humidity control function when they are laminated on both sides or one side of a sheet, such as a printed vinyl sheet, a sheet impregnated with melamine resin, Problems such as bacteria, insect habit, inconvenience, and environmental damage were large.

In the patent application No. 10-0222241 (filed on September 2, 1999) of the present applicant, cork is used as a constituent element to utilize the advantages of cork having functions of soundproofing, sound absorption and elasticity Discloses a method for producing a cork paneling material having far-infrared radiation ability, sterilization, insect resistance, antifungal and deodorizing ability.

The cork sheet-like material disclosed in this patent document is obtained by adhering a cork pattern or a cork plate to a plate material and polishing a cork surface, and then, by using a soft acrylic UV paint, numerous metaphysical grooves peculiar to the cork pattern are repeatedly rotated , The grooves are flatly coated at a time, dried with ultraviolet rays, and then re-coated and repainted.

The cork sheet material manufactured through these processes has various advantages such as durability and abrasion resistance but there is a problem of excessive coating cost and a problem of partially disappearing or remarkably reducing the greatest merit of cork and a simple dark brown, The problem with the environment was still not overcome.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art, and it is an object of the present invention to provide a cork screen which has many metaphysical grooves of a cork surface without damaging a cork- Namely, it is an object of the present invention to provide a cork substrate material in which ultrafine powder (particles) caught in fine pore grooves between particles and pores of a cork surface itself formed of porous cells are not derived.

Further, another object of the present invention is to provide a cork cork which is more advantageous for human health and indoor hygiene by coloring the cork uniformly, and is also various and ultra-modern, The present invention is to provide a cork board material having economical price due to mass production and quality improvement without any inconvenience in expressing bright colors and use.

In order to achieve the above and other objects,

(a) applying an adhesive to one or both sides of a base material of a cork plate material, adhering the cork pattern paper by thermocompression bonding, polishing and brushing the cork pattern paper surface;

(b) removing the fine cork powder in a plurality of metaphysical grooves formed on the surface of the cork pattern by air vacuum adsorption after the step (a);

(c) cleaning the plurality of metaphysical grooves formed on the surface of the cork pattern paper from the step (b) by forward rotation and reverse rotation of a dehydrated soft cloth or a sponge-attached crawler after soaking in a solvent, Removing fine cork powder remaining in a plurality of metaphysical grooves formed on the surface of the cork pattern paper; And

(d) The metaphysical grooves are colored with a coloring composition by press-impregnation with roll coater, or even colored with a coloring composition free of calcium carbonate as a filler in a coloring composition, and then printed or top coated with a gravure printing roller or spray And passing the embossing roller through the emboss roller.

In the present invention, the substrate of the cork plate material used in step (a) is selected from the group consisting of wood plate, metal plate, inorganic plate, gypsum board, paper board, nonwoven board, woven board and synthetic board.

In the present invention, in the step (a), the cork pattern paper may be mixed with a drum mold or a rectangular frame at a weight of 80 kg to 600 kg / m ³ in which cork particles having an adhesive mixed therein are 0.1 mm to 5 mm or 0.1 mm It is preferable to use a cork fleece which is compressed to 0.5 mm to 2 mm in a block formed by compression and heat drying.

In the present invention, the cork coating composition used in step (a) comprises 40 to 70% by weight of cork powder and 30 to 60% by weight of natural latex based on the total weight of the cork coating composition. Alternatively, the cork coating composition used in step (a) may comprise 35-50 wt.% Cork powder, 25-35 wt.% Resin, 10-25 wt.% Aqueous alcohol, water 6 To 2% by weight of a pigment, 0.1 to 0.5% by weight of an emulsifier, 0.1 to 0.5% by weight of a dispersing agent and 0.1 to 0.5% by weight of an antifoaming agent.

In the present invention, in the step (a), the polishing is preferably carried out with a # 150 to # 600 polishing by a sander.

In the present invention, the coloring composition comprises 28 to 45% by weight of resin, 12 to 25% by weight of aqueous alcohol, 16 to 22% by weight of liquid germanium, 20 to 35% by weight of calcium carbonate based on the total weight of the coloring composition, 0.1 to 0.5% by weight of a dispersant, 0.1 to 0.5% by weight of a defoamer, and 0.1 to 0.5% by weight of a thickener.

According to another aspect of the present invention,

(a) applying a cork coating composition to either or both sides of a base material of a cork plate material, followed by drying, polishing and brushing;

(b) after the step (a), removing cork powder in a plurality of metaphysical grooves formed on the surface of the cork coating composition layer by air vacuum adsorption;

(c) washing the plurality of metaphysical grooves formed on the surface of the cork composition layer from the step (b) by forward rotation and reverse rotation of a dehydrated soft cloth or a sponge-attached cota after wetting with a solvent Removing fine cork powder remaining in a plurality of metaphysical grooves formed on a surface of the cork composition layer;

(d) The metaphysical grooves are colored with a coloring composition by press-impregnation with roll coater, or even colored with a coloring composition free of calcium carbonate as a filler in a coloring composition, and then printed or top coated with a gravure printing roller or spray And passing the embossing roller through the emboss roller.

In the present invention, the substrate of the cork plate material used in step (a) is selected from the group consisting of wood plate, metal plate, inorganic plate, gypsum board, paper board, nonwoven board, woven board and synthetic board.

In the present invention, the cork coating composition used in step (a) comprises 40 to 70% by weight of cork powder and 30 to 60% by weight of natural latex based on the total weight of the cork coating composition. Alternatively, the cork coating composition used in step (a) may comprise 35-50 wt.% Cork powder, 25-35 wt.% Resin, 10-25 wt.% Aqueous alcohol, water 6 To 2% by weight of a pigment, 0.1 to 0.5% by weight of an emulsifier, 0.1 to 0.5% by weight of a dispersing agent and 0.1 to 0.5% by weight of an antifoaming agent.

In the present invention, the cork coating composition used in step (a) comprises 40 to 70% by weight of cork powder and 30 to 60% by weight of natural latex based on the total weight of the cork coating composition. Alternatively, the cork coating composition used in step (a) may comprise 35-50 wt.% Cork powder, 25-35 wt.% Resin, 10-25 wt.% Aqueous alcohol, water 6 To 2% by weight of a pigment, 0.1 to 0.5% by weight of an emulsifier, 0.1 to 0.5% by weight of a dispersing agent and 0.1 to 0.5% by weight of an antifoaming agent.

In the present invention, in the step (a), the polishing is preferably carried out with a # 150 to # 600 polishing by a sander.

In the present invention, the coloring composition comprises 28 to 45% by weight of resin, 12 to 25% by weight of aqueous alcohol, 16 to 22% by weight of liquid germanium, 20 to 35% by weight of calcium carbonate based on the total weight of the coloring composition, 0.1 to 0.5% by weight of a dispersing agent, 0.1 to 0.5% by weight of an antifoaming agent and 0.1 to 0.5% by weight of a thickening agent.

Further, the present invention provides a cork material comprising a cork object and a coloring composition layer laminated on one or both sides of the cork object, wherein a metaphysical groove formed on the surface of the cork object is filled with the coloring composition, Lt; RTI ID = 0.0 > cork < / RTI >

By virtue of the present invention, the residual fine cork powder in the numerous metaphysical grooves of the cork surface is completely removed, and the deep color of the fine grooves is uniformly colored or filled with the flat material by the coloring composition, The problem of inconvenience was removed when using color and appearance, and subsequent processes such as printing for expressing design in various cultures and times were smooth and mass production, quality improvement, and economic price were executed.

As shown in Table 1 above, it has a far-infrared radiation ability equivalent to that of the elvan, and has antibacterial and antifungal properties as shown in Tables 2 to 4. As can be seen from Table 1, , And the deodorizing ability is excellent.

In addition, it has the ability of automatic adjustment of the four seasons humidity, the cement poison and the cold air cut, the amorphous whole, the cooling and heating fuel saving effect, and the flame retardant effect by the addition of flame retardant. It is a beneficial invention to create hygienic healthy housing, commercial living space and living room storage space.

The term "metaphysical grooves " as used herein should be understood to include both fine tortuous grooves between cork particles and particles and ultrafine pore grooves of cork surface itself formed of porous cells.

Hereinafter, the present invention will be described more specifically with reference to the accompanying drawings.

FIG. 2 is a cross-sectional view of a cork plate prepared according to an embodiment of the present invention. FIG. 3 is a cross-sectional view of a cork panel manufactured according to an embodiment of the present invention. Fig. 4 is a view showing a state in which a coloring composition is applied to a cork pattern layer without a press-impregnation step as in the present invention, and Fig. 5 Fig. 6 is a graph showing the emissivity of a cork plate material produced by the present invention, Fig. 7 is a graph showing the emissivity of a cork sheet material produced by the present invention Fig. 3 is a graph showing the radiant energy of the cork plate-like material produced by the present invention.

The cork cork and cork pattern plate are appropriately arranged on the one side of the substrate of the cork plate material, and the cork pattern and the cork pattern plate are suitably arranged. Then, the pressure is adjusted to 10 to 5 kgf / cm ^{3 with} a hot press at a temperature of 60 to 110 ° C for 2 to 6 minutes The cork coating composition is coated on one side of the substrate by a roll coating method to a predetermined thickness of 0.2 mm to 0.6 mm and dried at a temperature of 100 ° C to 140 ° C by a hot air dryer to be aged. It is possible to remove debris by brushing with irregular cork surface by using sander with abrasive paper # 150 ~ 600 by soft pressing, thermal drying and swelling of cork particles, etc., and then brushing with a soft brush, A fine groove formed between the cork particle and the particle and an ultrafine cork powder caught in the pore of the cork itself are removed by an air vacuum adsorption method and are dipped in a solvent, and then a dehydrated soft cloth, a sponge- The coloring composition is completely removed by using the forward rotation and the reverse rotation of the cork, and the cork surface is impregnated with the roller by impregnation of the rollers to the inside of the metaphysical grooves of the cork surface to form a flat color, or calcium carbonate as a filler in the coloring composition is removed, It is possible to selectively color the inside of the groove evenly depending on the use of the product and the subsequent process. The colored cork surface is printed or top coated with a gravure printing roller or a spray method, dried by hot air, and then passed through an emboss roller.

The cork pattern paper and the cork patterned fingerboard used in the above are mixed in a drum-shaped frame or a rectangular frame with the cork particles having an adhesive mixed therein of Ø 0.1 to 5 mm or 0.1 mm to 80 kg to 600 kg / m ³ , It can be obtained by keeping 0.5mm ~ 2mm in the block which is compressed and thermally dried.

The cork coating composition according to any one of claims 1 to 3, wherein the cork coating composition comprises 40 to 70% by weight of cork powder and 30 to 60% by weight of natural latex, 35 to 50% by weight of cork powder, 25 to 35% Wherein the coloring composition and the printing composition are provided in the form of a mixture of 25% by weight, 6 to 12% by weight of water, 2 to 10% by weight of a pigment, 0.1 to 0.5% by weight of an emulsifier, 0.1 to 0.5% By weight of a resin, 28 to 45 wt% of a resin, 12 to 25 wt% of an aqueous alcohol, 16 to 22 wt% of liquid germanium, 20 to 35 wt% of calcium carbonate, 2 to 10 wt% of a pigment, 0.1 to 0.5 wt% 0.1 to 0.5% by weight, and a thickener in an amount of 0.1 to 0.5% by weight

The resin may be used either singly or in the form of a mixture of acrylic resin, urethane resin, PE, EVA and epoxy resin.

The particle size of the cork powder is preferably 10 to 160 mesh, and 50 mesh is suitable.

When it is desired to have flame retardancy, a flame-retarded plate substrate may be used, and at least one of cork coating composition, aluminum hydroxide, antimony oxide, fluorine series and chlorine series may be added to the coloring and printing composition.

The substrate of the cork plate material is wood plate material (PB, MDF, plywood, etc.), metal plate material, inorganic plate material, gypsum board, paper, nonwoven fabric,

The results of the emissivity and radiant energy of the cork panel specimens prepared as described above were as follows.

This experiment was carried out at 40 ° C and the results were compared with black body using FT-IR spectrometer. The emissivity and radiant energy are also shown graphically in Figs. 6 and 7. Fig. In Fig. 7, the upper graph line is the ideal black body, that is, 100% absorption, 100% of the radiation, and the lower line is the absorption radiation of the test body.

Also, a test piece of a cork plate-like material manufactured by the above method was prepared and subjected to antibacterial test, antifungal test and deodorization test.

Antibacterial test

Escherichia coli was cultured on cork substrate, and the number of bacteria was measured with time and compared with the number of bacteria measured in the absence of sample (blank).

Table 2 shows the results of the same test using Pseudomonas aeruginosa .

Antifungal test

Table 3 shows the results of culturing the strains mixed with fungus Aspergillus niger, Peniccillium pinophilum and Chaetomium globosum for 4 weeks in the cork substrate.

In Table 3, the numerical value 0 indicates that the growth of bacteria in the sample can not be recognized.

Deodorization test

Table 4 shows the results of measurement of the gas concentration with time in the gas detection tube using ammonia gas and the cork plate as the sample.

Also, the concentrations measured in the blank (blank) state are shown together.

From the results of Tables 1 to 4, it can be seen that even after coloring the cork fleck using the coloring composition, there is almost no change in the characteristics of the cork itself.

3 to 5 illustrate a situation that can occur in a number of metaphysical grooves formed on the surface of cork paper or cork coating composition layer when the process according to the present invention is not partially carried out.

FIG. 3 is a view showing a state in which a colored composition is applied to a cork pattern layer without an air vacuum adsorption process and a cleaning process as in the present invention, and since fine cork powder remains in all the HA, HB, and HC holes, There is a risk of dispersion of cork powder.

FIG. 4 is a view showing a state in which a coloring composition is applied to a cork pattern layer without a press-impregnation process as in the present invention. In the case of HB which is a general hole and HB which is a long hole, a coloring composition is filled, There is a possibility that coke powder may be generated due to long-term use in the case of an HC hole in which the penetration of the coloring composition is difficult because the inlet is small.

5 shows a state in which a coloring composition is applied to a cork pattern layer after the process according to the present invention is applied. Even though the HC hole is filled with a coloring composition due to a pressure impregnation process, It is expected that there will be little generation of flour.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. It can be understood that it is possible.

1 is a process diagram showing two methods of manufacturing according to a preferred embodiment of the present invention.

2 is a cross-sectional view of a cork plate manufactured by an embodiment of the present invention.

3 is a view showing a state in which a coloring composition is applied to a cork pattern layer without an air vacuum adsorption process and a cleaning process as in the present invention.

Fig. 4 is a view showing a state in which a colored composition is applied to a cork pattern layer without a press-impregnation process as in the present invention.

Figure 5 is a diagrammatic representation of a coloring composition applied to a cork pattern layer after being processed by the process according to the invention.

6 is a graph showing the emissivity of a cork plate-like material produced by the present invention.

7 is a graph showing radiant energy of a cork plate-like material produced by the present invention.

Description of the Related Art

100 - wall 110 - wall base layer

120 - Adhesive layer 130 - Cork pattern layer (or cork coating composition layer)

140 - Coloring composition layer 150 - Printing layer

160 - Top Coating and Embossed Layer

Claims (12)

(a) polishing and brushing the surface of the cork object after applying a cork object to either or both sides of the base material of the cork material; (b) removing fine cork powder in a plurality of metaphysical grooves formed on the surface of the cork object by air vacuum adsorption after the step (a); (c) cleaning the plurality of metaphysical grooves formed on the surface of the cork object from the step (b) by forward rotation and reverse rotation of a dehydrated soft cloth or a sponge-attached crawler after soaking in a solvent, Removing fine cork powder remaining in a plurality of metaphysical grooves formed in the object; And (d) coving the metaphysical grooves with a coloring composition by press roll impregnation with a coloring composition, uniformly coloring and then passing the embossing roller after printing or top coating with a gravure printing roller or spray, A method for manufacturing a base material. delete The cork material according to claim 1, wherein the cork object of step (a) is a cork pattern, and after applying an adhesive to one or both sides of the base material of the cork sheet material, the cork pattern paper is thermo- And polishing and brushing the surface of the cork material. The method of claim 1, wherein the cork material of step (a) is a layer of cork coating composition, the cork coating composition is applied to either or both sides of a substrate of a cork plate material, And brushing the cork material. The method of claim 1, wherein the substrate of the cork plate material used in step (a) is selected from the group consisting of a wood plate, a metal plate, an inorganic plate, a gypsum board, a paper board, a nonwoven board, ≪ / RTI > The cork pattern according to claim 3, wherein the cork pattern is a mixture of cork particles having a diameter of 0.1 mm to 5 mm mixed with an adhesive and having a weight of 80 kg to 600 kg / m ³ mixed into a drum frame or a rectangular frame, Characterized in that the cork paper cloth is a cork pattern paper which is kept at 0.5 mm to 2 mm in the width direction. 5. The method according to claim 4, wherein the cork coating composition comprises 40 to 70% by weight of cork powder and 30 to 60% by weight of natural latex based on the total weight of the cork coating composition. The composition of claim 4, wherein the cork coating composition comprises 35-50 wt.% Cork powder, 25-35 wt.% Resin, 10-25 wt.% Aqueous alcohol, 6-12 wt.% Water, , 2 to 10% by weight of a pigment, 0.1 to 0.5% by weight of an emulsifier, 0.1 to 0.5% by weight of a dispersing agent and 0.1 to 0.5% by weight of an antifoaming agent. 4. The method according to claim 3, wherein in step (a), the polishing is carried out with a polishing machine # 150 to # 600 using a sander on the surface of the cork pattern layer. The method according to claim 1, wherein the solvent used in step (b) is water, alcohol, or thinner. The coloring composition of claim 1, wherein the coloring composition comprises 28 to 45 wt% of resin, 12 to 25 wt% of aqueous alcohol, 16 to 22 wt% of liquid germanium, 20 to 35 wt% of calcium carbonate, And 0.1 to 0.5% by weight of a defoaming agent, and 0.1 to 0.5% by weight of a thickening agent, based on the total weight of the cork material. A cork sheet prepared by the method of claim 1, which is formed by a cork object and a coloring composition layer applied and laminated on one or both sides of the cork object, wherein a metaphysical groove formed on the surface of the cork object is filled with the coloring composition Overhead.

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