KR100457720B1 - Flooring material having beneficial functions by applying a photo-catalyst to a surface processing layer - Google Patents

Abstract

PURPOSE: A flooring material with added photo-catalyst is provided to improve pollution resistance and wear resistance by thinly layering a surface processing agent and exposing the photo-catalyst to the surface and to obtain anti-bacteria, deodorization, organic matter dissolution, and anion generation effects at the same time. CONSTITUTION: In a multi-stage layered flooring material, a titanium dioxide or zinc oxide photo-catalyst is crushed into fine particles of 0.01¯100nm and added into an outermost surface processing layer of the flooring material at 1¯10wt%. The activation of the photo-catalyst is maximized by increasing a specific surface area and the transparency of the flooring material is not reduced by crushing the photo-catalyst into fine particles. The flooring material is composed of a base layer(1), an upper layer(2), a printing layer(3), a transparent upper layer(4), a surface processing layer(5), and a lower layer(6).

Description

Photocatalyst added flooring

The present invention is beneficial to the human body having an antibacterial function, an organic decomposition function, an odor and odor removal function, and an anion generating function, which are inherent functions of the photocatalyst, by mixing and stacking a photocatalyst active by light on the surface treatment layer, which is the top layer of the flooring material. It is about flooring.

Conventional flooring material mainly used the method of adhesive construction of the same material as the traditional hanji to the building floor, but with the development of technology, it is easy to install and developed a flooring using a plastic material having a variety of patterns and colors, recently Various functions such as antibacterial, deodorant, and far-infrared radiators have been added to flooring materials to produce products that meet the various needs of consumers.

However, the flooring material having various functions at the same time has a lot of difficulties, such as precipitation occurs in the manufacturing process, causing physical properties such as lowering of transparency and thermal deformation, or rising costs at a relatively high cost.

Looking at the fragmentary example of the flooring having such a function, the flooring having an antimicrobial function is generally laminated by adding organic and inorganic antimicrobial agent to one layer of the vinyl flooring sheet. The harmful ingredients are eluted to the surface and come into contact with the skin or vaporize to contaminate the air in the living space. Therefore, people living in the space are inhaled and cause disease to the human body. It is relatively expensive, and when applied to the surface treatment layer of the flooring, precipitation occurs in the manufacturing process and transparency has sometimes decreased. In addition, in the case of ceramics in which negative ions are generated, most of them are radioactive, which is harmful to the human body when exposed for a long time.

In addition, most flooring materials remove organic materials by wiping off contaminants. If these organic materials are not removed for a long time, they may damage the flooring itself or cause odors, and may cause insects or insects to gather. The ability to decompose has been required.

The present invention has been made to solve the problems of the conventional flooring as described above, the object of the present invention can be manufactured using the conventional flooring manufacturing technology and construction technology as it is, there is no toxicity harmless to the human body, antibacterial It provides a flooring that is beneficial to the human body, which has all of its functions, its ability to decompose organic matter, remove odors and odors, and generate negative ions.

1 is a cross-sectional view of a warning line flooring having a surface treatment layer and an upper layer to which a photocatalyst is added;

2 is a cross-sectional view of a heavy-duty flooring material having a surface treatment layer to which a photocatalyst is added and a chip layer in which chips are scattered on the substrate layer;

3 is a cross-sectional view of a heavy walking flooring having a surface treatment layer to which a photocatalyst is added and a transparent upper layer in which chips are stacked;

4 is a cross-sectional view of a tile-based flooring composed of a multilayer laminate having a surface treatment layer added with a photocatalyst.

**** Description of the symbols for the main parts of the drawings ****

1. Base layer 2. Top layer 3. Printing layer

4. Transparent upper layer 5. Surface treatment layer 6. Lower layer

7. Chip 8. Backing Layer

As a result of research to develop a flooring material which can achieve the above object, it is possible to efficiently absorb energy from light by adding a photocatalyst to the surface treatment layer of the flooring material, and to treat the surface material without impairing the properties or transparency of the flooring material. The present invention has been completed by developing a flooring material which can improve fouling resistance and abrasion resistance of a flooring material possessing a layer, and simultaneously provide antibacterial or deodorizing function, organic material decomposition function, and anion generating function, which are inherent functions of a photocatalyst.

The photocatalyst used in the present invention is a type of catalyst having a function of receiving light to decompose organic materials, and when absorbing energy such as lighting or sunlight in a room, the photocatalyst generates ionized oxygen molecules, that is, active oxygen, which are organic materials. Because it oxidizes and so on, the microorganism sterilizes or decomposes organic substances to deodorize to remove inherent odors and odors. In addition, the anion formed during the reaction forms another anion or radical, and the generated anion increases the activity of the cells constituting the biological tissue, and the metabolism of electrolytes and waste products takes place actively at the cell membrane boundary. It can make a beneficial living environment.

Such photocatalysts can be mainly obtained by pulverizing titanium or zinc-based oxides or organic or metal-based oxides. Examples of such photocatalysts include TiO ₂ and ZnO, and their uses include wastewater treatment, air purification systems and outdoor signage. It is applied to building materials to prevent contamination of structures, ceramics for refractory or odor removal, refractories, and products that remove pollution by giving hydrophilicity to indoor or outdoor glass or signs.

However, the first example of applying the photocatalyst to a flooring material is the present invention. In particular, in the present invention, a titanium oxide or zinc oxide-based photocatalyst may be formed into particles of several nanometers (nm) in order to facilitate workability in applying the photocatalyst to the flooring material. By pulverizing to increase the specific surface area to maximize the catalytic activity and to reduce the particle size to reduce the transparency. That is, in the present invention, the titanium oxide-based or zinc oxide-based photocatalyst is pulverized into fine particles of 0.01 to 100 nm, and the specific surface area is increased to maximize the catalytic activity, and by adding 1 to 10% by weight, sufficient precipitation can be achieved. This can be prevented from occurring, and since the particles are made small, the transparency of the transparent upper layer of the flooring material can be prevented from decreasing.

The flooring material to which the photocatalyst according to the present invention is applied may be produced by the same process as the manufacturing process of a general flooring material, which will be described in detail with reference to the drawings attached to the present invention as an example of a general household flooring material.

In the flooring according to the present invention as shown in Figure 1, the base layer 1 is 100 parts by weight of PVC paste resin, 40 to 70 parts by weight of plasticizer, stabilizer 1 to 3 parts by weight, filler in a glass fiber mat made of a nonwoven fabric It is prepared by impregnating 50 to 200 parts by weight.

Laminating the upper layer (2) on the base layer, the laminating method is a method of coating using a well-known knife coater, river coater, bar coater, screen coater, etc. and then sufficiently gelling using a gelling drum or oven at 140 ~ 170 ℃ In addition, lamination can be performed by rolling a sheet using a calendar or by extrusion using a tee (T) die to produce a sheet.

The upper layer is 100 parts by weight of PVC paste resin, 40 to 70 parts by weight of plasticizer, 1 to 3 parts by weight of stabilizer, 1 to 5 parts by weight of foaming agent, 10 to 50 parts by weight of filler, 1 to 5 parts by weight of zinc-based accelerator, In the mixer with impeller, the sol (SOL) processing method of mixing for 10 to 40 minutes and keeping the internal temperature below 40 ° C, 100 parts by weight of PVC straight resin, 40 to 70 parts by plasticizer, 1 to 3 parts by stabilizer, 1 to 5 parts by weight of the blowing agent, 10 to 50 parts by weight of the filler, 1 to 5 parts by weight of the zinc-based accelerator, quantitatively mixed, mixed for 5 to 20 minutes in a super mixer, and rolled in calender or extruded in TiDy You can get it.

In this way, various patterns and colors can be printed (3) on the semi-finished product obtained by laminating the upper layer (2) on the base layer (1), and the printing uses known gravure printing, offset printing, and rotary screen printing. The ink used may be applied by mixing 10 to 40 parts by weight of a PVC copolymer, 30 to 70 parts by weight of an organic solvent, and 0.1 to 20 parts by weight of an undispersed organic or inorganic pigment, by mixing in a high speed mixer.

When the printing is completed by the above process, the transparent upper layer 4 is laminated on the printed upper part. The transparent upper layer may absorb 100 parts by weight of PVC paste resin, 40 to 70 parts by weight of plasticizer, and 1 to 3 parts by weight of stabilizer. 0.1 to 1 parts by weight of the ultraviolet absorber can be mixed in a mixer with a high-speed impeller, such as the upper layer for 10 to 40 minutes and sol (SOL) processing method to maintain the internal temperature below 40 ℃, 100 parts by weight of PVC straight resin, 40 to 70 parts by weight of plasticizer, 1 to 3 parts by weight of stabilizer, 0.1 to 1 part by weight of UV absorber are mixed and mixed in a super mixer for 5 to 20 minutes, then rolled in a calendar or extruded in a Ti-die to obtain a sheet. It can be laminated by a method of heating and plywood it.

After the transparent upper layer 4 is laminated, the bottom layer 6 is laminated and foamed as shown in FIG. 1 to give cushioning properties to the flooring material. The lower layer applied at this time is 100 parts by weight of PVC paste resin and 30 to 70 parts by weight of plasticizer. , 1 to 3 parts by weight of stabilizer, 1 to 5 parts by weight of foaming agent, 10 to 50 parts by weight of filler, 1 to 5 parts by weight of zinc-based accelerator, quantitatively mixed and mixed for 10 to 40 minutes in a mixer with a high speed impeller, and the internal temperature is 40 ℃ SOL processing method to keep below, 100 parts by weight of PVC straight resin, 40 to 70 parts by weight of plasticizer, 1 to 3 parts by weight of stabilizer, 1 to 5 parts by weight of blowing agent, 10 to 50 parts by weight of filler, zinc-based 1 to 5 parts by weight of accelerator is added and mixed in a super mixer for 5 to 20 minutes, and rolled in a calendar or extruded in a die sheet to obtain a foamed form at 190 to 250 ° C, or a non-foamed sheet layer. It is possible to laminate.

In the following process, the surface treatment layer 5 is laminated. The surface treatment paint applied here may be an ultraviolet curable paint or a thermosetting water-soluble paint. Examples thereof include a polyacryl, polyurethane, and polycarbonate ultraviolet curable paint. Use a thermosetting water-soluble paint. 0.01 to 100nm of finely ground photocatalyst is added to the paint to make it disperse well, and then it is coated with photocatalyst by the method of roll coating, air knife coating, sponge roll coating, reverse roll coating, etc. By laminating and hardening, a warning line flooring material with a photocatalyst can be obtained. By applying the photocatalyst finely in the range of 0.01 to 100 nm, transparency of the flooring material can be maintained, and also in the range of 1 to 10 wt%, sufficient dispersion can be achieved in the paint.

In addition, the present invention is a heavy walking flooring material that forms a predetermined pattern on the chip by pressing and using a press roll in a state in which the amorphous or amorphous chip 7 is dispersed and heated on the base layer 1 as shown in FIG. After spreading the chip on the transparent upper layer (4), by attaching the back layer (8) consisting of a non-woven fabric or a non-foamed sheet at the bottom end, a heavy walking flooring material for construction in a large amount of walking, surface treatment layer (5), transparent as shown in FIG. The present invention can also be applied to tile floors composed of an upper layer 4, a printing layer 3, an upper layer 2, a base layer 1, and a back layer 8.

Test Example

In order to confirm the effect of the present invention, a product coated with a UV paint containing 4% titanium oxide having a photocatalytic function (example) and a product coated with a general UV paint on the semi-finished product obtained by the above manufacturing process (comparative example) The test was conducted in the following manner.

<Test method>

1. Production of specimen

UV without photocatalyst added to the same thickness as the specimen (Example) of FIG. 1 structure in which a UV paint obtained by dispersing a photocatalyst of about 15 μm (micron) was well deposited on a semi-finished product obtained by a sol coating process among the flooring manufacturing methods. A specimen (comparative example) in which paints were laminated was produced.

2. Test requirements

In order to compare the effect of the photocatalyst with respect to all the following test procedures, 1mW / cm 2 ultraviolet rays were irradiated under the same conditions, and the test was performed to observe the degree.

3. Test method

1) Decolorization degree of iodine tincture: In order to observe the decomposition of organic substances contacted by the active oxygen generated when ultraviolet light is irradiated to the photocatalyst, after about 6 hours with iodine buried in the product of the above Examples and Comparative Examples After washing with water to be uniformly contaminated, and then irradiated with ultraviolet light of 1mW / ㎠ to determine the degree of discoloration after 24 hours. The greater the degree of discoloration of the iodine tincture, the better the organic resolution.

2) Degree of anion generation: Anion measuring device in a constant temperature and constant humidity room of about 20 ㎥ (formed by applying DC voltage to the suction pipe when suctioning ions in the air at a constant flow rate, forming an electrostatic field of radiation Anion measuring equipment designed to obtain the number of anions by the current value and flow rate of the ammeter generated by the deflection of ions in the air sucked into the air, and keep the distance from the specimen constant. In order to keep the concentration constant, each test was ventilated and suctioned to make the number of negative ions less than 100 ion / cc, and the negative ions were calculated (the number of negative ions generated every minute was measured for 30 minutes and averaged. Calculation).

3) hydrophilic properties; The specimens were placed on a flat, uneven bottom, and the same amount of distilled water was dropped thereon to compare the size of the water film formed.

4) antibacterial effect; After inoculating the Examples and Comparative Examples with the test bacteria, a certain amount of the inoculum was intimately adhered between the specimen and the specimen, and then the cultured bacteria were extracted and the number of bacteria present in the extract was measured. The comparative example of non-comparative product was measured by the pressure-adherence method comparing the bacterial reduction rate (the number of bacteria is calculated by multiplying the number of bacteria on the medium by the dilution factor).

Announcement of use: E. coli (Escherichia coli ATTCC25922)

Culture: Measure the bacteria after 24 hours incubation at 25 ℃

Specimen: 5 × 6 cm, N number = 3 pairs

The test results are shown in Table 1 below.

Table 1

Test Items Comparative example Example Decolorization of iodine tincture Slightly discolored Fully discolored Negative ions 178 ion / cc 225 ion / cc Hydrophilic properties usually Excellent Antibacterial test (bacteria reduction rate) 19.8% 99.5%

As shown in the results of Table 1, the product of the embodiment according to the present invention is completely decolorized of the iodine tincture by the photocatalyst when irradiated with ultraviolet light, a lot of negative ions are generated, the surface is changed to hydrophilic, antibacterial properties It was found to be excellent.

Similar results were obtained when 71.5 mW / cm 2 fluorescent lamps were irradiated under the same conditions, indicating that the photocatalyst reacts efficiently in ordinary household fluorescent lamps.

The flooring according to the present invention in which the photocatalyst is mixed and laminated on the surface treatment layer may be manufactured by a conventional flooring manufacturing process, and the photocatalyst may be efficiently absorbed from light by applying the photocatalyst to the surface treatment layer, which is the uppermost layer. Since the photocatalyst is easily exposed to the surface, the efficiency is maximized to improve the fouling resistance and wear resistance of the flooring material, and also has the effect of antibacterial, deodorization, organic matter decomposition and anion generation by the photocatalyst.

In addition, the flooring material of the present invention increases the specific surface area by crushing and adding a titanium oxide or zinc oxide-based photocatalyst into particles of about 0.01 to 100 nm in order to facilitate processability, thereby maximizing the catalytic activity and decreasing the transparency of the flooring material because the photocatalyst particles are small. It does not have the advantage.

Claims (3)

In the flooring laminated in a multi-layer, characterized in that 1 to 10% by weight of the surface treatment agent is added to the surface treatment layer which is the top layer of the flooring material by grinding titanium oxide or zinc oxide photocatalyst into 0.01 ~ 100nm fine particles Flooring. The flooring material of claim 1, wherein the flooring material is a warning line flooring material consisting of a base layer, an upper layer, a printing layer, a transparent upper layer, a surface treatment layer, and a lower layer. The flooring material of claim 1, wherein the flooring material is a heavy walking flooring material comprising a base layer, a chip layer, or a transparent upper layer containing a chip, a surface treatment layer, and a backing layer.