KR100723221B1 - Conductive marble flooring and method of making the same by continuous process - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conductive flooring material and a method of manufacturing the same, and to a manufacturing method having a relatively low manufacturing cost by producing a continuous method, and more particularly, to a conductive flooring containing a conductive carbon black exhibiting a marble effect and a method of manufacturing the same.

The flooring material of the present invention not only contains conductive carbon black uniformly and can be manufactured with a variety of marble flooring materials, but also has a conductive conductivity that is stable on the upper and lower sides compared to the conventional method by back printing the conductive carbon black ink on the back surface. By imparting it can be made so that there is no change in conductivity according to the wear of the product, it is possible to manufacture long and tile type.

Conductive, Carbon Black, Uniform Layer, Polyvinyl Chloride, Marble Flooring

Description

Conductive marble flooring and manufacturing method by the continuous method thereof {Conductive marble flooring and method of making the same by continuous process}

1 is a front view of a conductive marble flooring material provided with a marble manufactured by the continuous method according to the present invention

Figure 2 is a cross-sectional view of a conductive marble flooring material with a conductive carbon ink back printed on the back of the product produced according to another aspect of the present invention.

<Description of the symbols for the main parts of the drawings>

1: Marble shape imparted from conductive carbon black sheet

2: marble shape imparted from the first monochrome sheet

3: marble shape imparted from the second monochrome sheet

4: conductive carbon ink layer

5: conductive marble sheet

The present invention relates to a conductive flooring material of the present invention and a method for manufacturing the same, and more particularly, to a conductive flooring material containing a carbon black provided with marble and composed of one uniform layer, and a method for manufacturing the same by a continuous method. .

In general, a flooring material having a conductive function is expressed as an electrical resistance value, and according to NFPA's 99 regulation, the surface and volume resistance is set to 10,000 to 1,000,000 Ohm. In particular, in places where problems may occur due to electrostatic disturbances, such as semiconductor assembly plants, it is prescribed that the above quality requirements can be used only.

In the conventional method of manufacturing a conductive tile including conductive carbon black, a vinyl chloride sheet is first manufactured, and then cut or pulverized into a chip, and then the conductive carbon black is coated on the vinyl chloride resin chip surface. The conductive carbon black coated chips are placed in a mold of a certain shape and heated and pressed using a press to prepare a block composed of one homogeneous layer including the conductive carbon black. Slicing the block to a certain thickness (sanding) to the sanding (sanding) of the surface and the back, thereby completing the conductive flooring material.

In order to realize the conductive effect of the conductive flooring material, the conductive carbon blacks must be connected to each other. In general, domestically manufactured by an intermittent process using a mold press. That is, the conventional conductive flooring material is manufactured in an intermittent process, there was a restriction in the improvement of productivity and the appearance effect.

In view of the conventional technical problems, the present invention provides a relatively inexpensive manufacturing cost compared to the conventional intermittent process in terms of productivity by manufacturing in a continuous method, and the marble effect is provided to enable a beautiful appearance compared to the conventional conductivity. An object of the present invention is to provide a long sheet and tile type flooring and a method of manufacturing the same.

Another object of the present invention is to provide a conductive long marbling flooring material and a method for manufacturing a stable conductive function compared to that produced by the conventional intermittent process by coating (ink) to give a conductive function on the back of the product To provide.

The present invention to achieve the above object, a) manufacturing a sheet containing a conductive carbon black, b) manufacturing two monochromatic sheets for the marble giving the same or different colors, c) the a) conductive B) pulverizing the sheet containing carbon black and the two sheets of marble for imparting marble; and d) arranging and calendering the chips pulverized in c), wherein each of the steps is performed in a continuous process. It provides a method for producing a conductive long marble flooring, characterized in that performed.

In another aspect, the present invention provides a conductive long marble flooring material made of a uniform layer containing a conductive carbon black and endowed with a marble effect prepared according to the manufacturing method.

In the conductive long marble flooring material according to the present invention, it is preferable that the conductive carbon ink is back printed on the back of the product so as to secure conductivity in upper and lower portions of the product and there is no change in conductivity due to wear of the product.

According to a preferred embodiment of the present invention, in the step c), the sheet containing the conductive carbon black of step a) and the two marble granting monochromatic sheets of step b) are first laminated and then ground. Plywood is a necessary process to realize unique marble and stable conductivity.

In the continuous process according to the present invention, the process of crushing, arranging, and calendering a chip including a sheet for marbling and a sheet including carbon black in advance is performed in a mold using a conventional mold press. This is different from the interrupting process, which comes out one mold at a time.

The flooring material of the present invention is a conductive flooring material composed of one uniform layer from the surface to the back surface produced by the continuous method, and various marble effects are provided.

In the conventional mold press method, a solid sheet without a marble (or a solid sheet with a simple marble) is pulverized, coated with conductive carbon black, and processed and sliced using a mold press. The marble effect cannot be compared with the use of one or two types of marble applying sheets as in the present invention.

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

1 is a front view of a conductive marble flooring material provided with a marble manufactured by a continuous method according to the present invention, and a conductive marble sheet manufactured by grinding and calendering two monochromatic sheets for marble application and a sheet containing conductive carbon black ( 5) a marble pattern (1) imparted from the conductive carbon black sheet and a marble pattern (2,3) imparted from the first and second monochromatic sheets are contained to form a uniform layer.

FIG. 2 is a cross-sectional view of a conductive marble flooring material having a conductive carbon ink back printed on a back surface of a product according to another aspect of the present invention, wherein the conductive carbon ink layer 4 is formed on a rear surface of the conductive marble sheet 5 of FIG. The conductivity is given to.

Looking at the manufacturing method of the floor decoration according to the present invention in detail as follows.

First, the vinyl chloride sheet containing conductive carbon black includes 100 parts by weight of vinyl chloride resin having a polymerization degree of 700 to 1,200, 5 to 40 parts by weight of dioctylphthalate (DOP) as a plasticizer, 1 to 10 parts by weight of epoxy resin, 4 to 15 parts by weight of barium-zinc compound, 0.1 to 2 parts by weight of phosphorus compound, 0.2 to 5 parts by weight of glycerin as antioxidant, 0.2 to 10 parts by weight of stearic acid, calcium carbonate as filler 100 to 600 parts by weight, and 20 to 100 parts by weight of conductive carbon black are blended in a ribbon blender for 12 to 20 minutes in a ribbon blender. Mixer: 150 to 250 at a temperature of 150 to 210 ° C. in a batch kneader in which raw materials are mixed and kneaded under high pressure by two specially shaped rotors in a closed space. After kneading and gelling for a second, it is refined in a mixing roll at 140 to 170 ° C. for about 1 to 3 minutes, and the heat-softened compound is calendered at a temperature of 100 to 170 ° C. It is made by rolling into a sheet having a thickness of 0.5 to 3 mm, and the vinyl chloride resin sheet thus completed is prepared in rolls or plates.

The first and second vinyl chloride monochromatic sheets for imparting marble are 100 parts by weight of vinyl chloride resin having a polymerization degree of 800 to 1,200, 5 to 40 parts by weight of dioctylphthalate as a plasticizer, 1 to 10 parts by weight of epoxy resin, and barium- 4 to 15 parts by weight of zinc compound, 0.1 to 2 parts by weight of phosphorus compound, 0.2 to 5 parts by weight of glycerin as antioxidant, 0.2 to 10 parts by weight of stearic acid, 100 to 600 parts by weight of filler calcium carbonate, and 20 to 80 parts by weight of pigment The parts were blended in a ribbon blender for 12 to 20 minutes, kneaded and gelled for 150 to 250 seconds at a temperature of 150 to 210 ° C. in a half-barrier mixer, and then refined at 140 to 170 ° C. for about 1 to 3 minutes on a mixing roll and plate A first softened compound is prepared, and the second compound is heat-softened in a plate form using the same pigment as the compound but using a different pigment.

In the above process, even if a single compound is used without using two kinds of pigments, conductivity may be imparted, and thus the final product may be imparted with a monotone carbon black.

The vinyl chloride sheet containing the first and second compounds and the carbon black prepared in advance is ground in a grinder in a weight ratio (40/40/20 wt%). At this time, the grinding ratio can be adjusted, the diameter of the ground chip is suitable 5 to 20 mm. The chip grinding process may be cut to a size of 5 to 20 mm using a cutting machine in addition to the grinder.

At this time, it is preferable to laminate the conductive sheet and two kinds of monochrome sheets before grinding. In the plywood step, three unwinders each contain a vinyl chloride sheet containing conductive carbon black, a first vinyl chloride monochromatic sheet for marble supply, and a second vinyl chloride monochrome sheet containing carbon black. It is prepared to come inside the sandwich structure (sand witch), and then integrated (plywood) using a plywood drum (plywood) and wound (winding). This process is also possible by press.

Looking at the step of arranging and calendering the pulverized chip, the pulverized chip is sprayed on an oven conveyer, heated to 150 to 250 ° C. and rolled with calender to impart a marble effect of 0.5 to 4 mm thick. The prepared conductive vinyl chloride sheet.

In the marble sheet manufacturing process, when the temperature of the rolled calendar is lower than 100 ° C., the marble does not extend in the longitudinal direction, and when it is higher than 130 ° C., the marble sheet extended in the longitudinal direction can be obtained.

Before winding the elongated sheet prepared above in a roll shape, it is possible to impart stable conductivity by back printing on the back surface using a conductive ink. The back side ink is vinyl chloride (90 wt%) and vinyl acetate (vinyl acetate, 10 wt%) 11 to 25 parts by weight copolymer, acryl resin (40 wt%) methyl ethyl ketone ( methyl ethyl ketone (60 wt%), 8 to 20 parts by weight of acrylic resin, 70 to 100 parts by weight of methyl ethyl ketone, 2 to 6 parts by weight of cellulose acetate butylate as a blocking agent, heat resistant It can be prepared by mixing 2 to 6 parts by weight of the barium-zinc compound as a stabilizer and 7 to 13 parts by weight of the conductive carbon.

The long sheet manufactured as described above can secure a beautiful appearance by sanding the surface as needed.The process is completed after cutting and inspecting and packing to a suitable size using a punching type cutting machine after back printing. do.

EXAMPLE

1. Preparation of Vinyl Chloride Sheet Containing Conductive Carbon Black

100 parts by weight of vinyl chloride resin having a degree of polymerization of 1,000, 20 to 40 parts by weight of dioctylphthalate as a plasticizer, 1 to 10 parts by weight of epoxy resin, 4 to 8 parts by weight of barium-zinc compound as heat stabilizer, 0.5 to 2 parts by weight of phosphorus compound , 2 to 5 parts by weight of glycerin as an antioxidant, 3 to 10 parts by weight of stearic acid, 400 to 500 parts by weight of filler calcium carbonate, and 40 to 45 parts by weight of conductive carbon black for 15 minutes (± 3 minutes) in a ribbon blender. After kneading and gelling for 180 (± 20 seconds) seconds at a temperature of 170 ° C. (± 10 ° C.) in a half-barrier mixer, and then refining it with a mixing roll, and heating the softened compound to 130 ° C. (± 20 ° C.) temperature It was rolled with a calender to prepare a 0.8 mm (± 0.2 mm) thick sheet and wound up with a roll.

2. Preparation of Vinyl Chloride Sheet for Marble

100 parts by weight of vinyl chloride resin having a degree of polymerization of 1,000, 20 to 40 parts by weight of dioctylphthalate as a plasticizer, 5 to 10 parts by weight of epoxy resin, 4 to 8 parts by weight of barium-zinc compound as heat stabilizer, 0.5 to 2 parts by weight of phosphorus compound , 2 to 5 parts by weight of glycerin as antioxidant, 3 to 10 parts by weight of stearic acid, 400 to 500 parts by weight of filler calcium carbonate, and 50 to 60 parts by weight of pigment for 15 minutes (± 3 minutes) in a ribbon blender, and After kneading and gelling for 180 (± 20 seconds) seconds at a temperature of 170 ° C. (± 10 ° C.) in a vari mixer, the mixture was refined with a mixing roll and heat-softened into a plate to prepare a first compound. On the other hand, the 2nd compound was manufactured using only a pigment by the same prescription as a 1st compound.

3. Each sheet is plywood and pulverized, arranged into chips and calendered

The vinyl chloride sheets containing the first and second compounds and carbon black were laminated using a plywood drum, and then ground to a weight ratio of 40/40/20 wt% and a diameter of 5 to 20 mm using a mill. The ground chip was sprayed on an oven conveyer, heated to 200 (± 20 ° C), and rolled with a calendar to prepare a conductive vinyl chloride sheet having a marble effect of 0.5 to 4 mm thick.

4. Process of back printing using conductive carbon ink

Before winding the prepared long sheet, a backside was printed using a conductive ink to impart stable conductivity. The ink used for the back side was 11 to 15 parts by weight of VYNS-3 (Union Carbide, USA) copolymer of vinyl chloride (90 wt%) and vinyl acetate (10 wt%), and an acrylic resin (acryl resin, 8 to 16 parts by weight of acrylic resin A-101 (Mitsubishi Rayon, Japan) made by dissolving 40 wt%) in methyl ethyl ketone (60 wt%), 70 to 80 parts by weight of methyl ethyl ketone, and an antiblocking agent 2 to 4 parts by weight of phosphorus cellulose acetate butyrate, 2 to 4 parts by weight of a barium-zinc compound, which is a heat stabilizer, and 7 to 9 parts by weight of conductive carbon.

5. The process of cutting to tile type

After back printing the prepared long sheet was cut to a suitable size using a perforated cutting machine, the inspection and packaging were completed.

Long sheet and tile produced through the above embodiment was able to work in a continuous process, it was possible to give a marble effect as shown in FIG.

Electrical properties of the conductive long sheets and tiles prepared in the above examples are shown in the table below.

division Example flooring standard Test Methods Electrical resistance Surface-surface 100,000 ~ 300,000 Ω 25,000 ~ 1,000,000 Ω ASTM F150, NFPA99 (100V, 500V) Surface-ground 70,000 ~ 300,000 Ω 25,000 ~ 1,000,000 Ω Static electricity generation 0.4 kV (walking) 0.5 kV (drag) Within 3.5 kV AATCC-134 Electrostatic dissipation 0.02 sec (drag) Within 0.5 sec Federal Method 101-4046

As a result of conducting the test as shown in Table 1 for the flooring manufactured in the above example, it was confirmed that the conductivity is good, and it was relatively inexpensive compared to the intermittent process in terms of manufacturing cost by the continuous method. In addition, by back printing the conductive carbon black ink on the back side (back printing) as compared to the conventional method ensures the conductivity of the upper and lower parts and can be manufactured in a long and tile type without a change in conductivity according to the wear of the product.

Claims (5)

a) preparing a sheet containing conductive carbon black, b) preparing two monochromatic sheets for marble supply having the same color or different colors; c) pulverizing the sheet containing the conductive carbon black of step a) and the two monochromatic sheets for marble feeding, and b); d) arranging and calendering the chips ground in step c), The method of manufacturing a conductive long marble flooring, characterized in that each step is carried out by a continuous method. The method of claim 1, further comprising e) back printing the conductive carbon ink on the back surface of the long sheet which has passed the d). The method of claim 1, wherein the sheet containing the conductive carbon black of step a) in step c) is first laminated with a sandwich structure positioned between the two marbled monochromatic sheets of step b), and then pulverized. Method of producing a conductive long marble flooring material. A conductive long marble flooring material prepared according to the method of claim 1, comprising a conductive carbon black and a uniform layer imparted with a marble effect, manufactured by a continuous method. The conductive long marble flooring material according to claim 4, wherein the conductive carbon ink is back printed on the back surface.

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