KR20200033231A - Wallpaper with air purification function - Google Patents

Abstract

The present invention relates to wallpaper with an air purification function which forms a purification layer capable of purifying air in a wallpaper sheet, wherein the purification layer comprises a purification composition containing calcium chloride, copper chloride, and iron salt.

Description

Wallpaper with air purification function {WALLPAPER WITH AIR PURIFICATION FUNCTION}

The present invention relates to a wallpaper having an air purifying function, and specifically, to a wallpaper having an air purifying function capable of purifying air by removing volatile organic compounds and odors in the air.

The environment in which we live is polluted with volatile organic compounds (VOCs; Volatile Organic Compounds, hereinafter referred to as 'VOCs') and various bacteria and fungi, and people spend most of the day indoors, but indoor pollution According to the situation, the human body's risk is much less recognized than outdoor pollution, and it is difficult to remove volatile organic compounds indoors, and it is easy to create an environment in which bacteria and fungi are easy to reproduce.

The volatile organic compounds (VOCs) include benzene, toluene, xylene, and the like, and they can cause mutations and cancer even in very small amounts.

In particular, benzene is a carcinogen and is a substance that induces leukemia and lymphoma. Toluene and xylene are known to cause damage to the kidneys and liver as well as brain dysfunction when habitually inhaled (MOBachmann and JE) Myers, Soc Sci Med 40, 245, 1995) These days, environmentally friendly regulations for these substances are conducted in the United States and Japan by implementing a system called "Pollutant Release and Transfer Register (PRTR)" to release, transfer and register environmental pollutants in the country. By legislation, the EU has been managed through the REACH system, which has been applied since 2004, and our country also manages volatile organic compounds through relevant regulations, but it is also used The countermeasures against Korea are still insufficient.

In addition, air pollution caused by bacteria and fungi causes a lot of unpleasant sensations by generating odors in clothing and interior products that are frequently used in real life.

In addition, recently reported to the media, the sick house syndrome is a serious harm to adults as well as physically resistant children, as harmful substances such as volatile organic compounds are dissipated from building materials such as wallpaper, furniture, flooring, etc. Giving.

Therefore, in recent years, the improvement of air quality has increased the public interest, and this social atmosphere demands environmentally friendly products that are pleasant to the daily necessities as well as comfortable and harmless to the human body.

In general, wallpaper was used as a method of plastering the surface of a building in a state of forming a wall of a building with paper applied to the inner wall or ceiling of a building, and finishing the interior by applying wallpaper on the plastered wall surface.

Recently, to solve the above-mentioned problems of volatile organic compounds and bacteria, a product has been released that gives functionalities such as air purification, antibacterial, and deodorizing to the wallpaper. In Korean Patent Registration No. 1729364, porous clay mineral coated with a photocatalyst has been released. A wallpaper that effectively improves indoor air quality through a porous clay mineral that is excellent in adsorbing pollutants by incorporating it in the wallpaper has been disclosed, and Korean Patent Registration No. 1133969 discloses a light source with a weak amount of light, such as incandescent lamps and fluorescent lamps, as well as sunlight. An air purifying function wallpaper capable of sufficiently exhibiting a photocatalytic action is disclosed.

The wallpaper as described above has an effect of removing harmful substances from the air through a photocatalyst, but the photocatalyst has a low adsorption rate of organic matter, and air purification using the clay mineral takes too long, so it is difficult to actually see a large effect.

In addition, there is a problem in that light energy is required for the air purification function, so that it cannot function in a dark night or an empty room for a long time.

Therefore, it is urgent to develop a wallpaper that can be used indoors while being able to effectively remove volatile organic compounds in the air and quickly remove odors and causes of odors.

The present invention was invented to solve the problems of the prior art as described above. It has high stability and decomposes volatile organic compounds with a high air purifying function, removes the root cause of odor, and can suppress various bacterial habitats. It is an object to provide a wallpaper having a purification function.

In the present invention, a purification layer capable of purifying air is formed on a sheet of wallpaper, and the purification layer includes a purification composition containing calcium chloride, copper chloride, and iron salt. It provides a wallpaper having a feature of air purification.

In addition, the sheet for the wallpaper provides a wallpaper having an air purification function, characterized in that any one of paper, fabric, knitted fabric, non-woven fabric.

In addition, the purification composition provides a wallpaper having an air purifying function characterized in that water contains 1 to 9% by weight of calcium chloride, 0.1 to 9% by weight of copper chloride, and 0.1 to 3% by weight of iron salt.

In addition, the purification composition has a pH of 6.0 ~ 8.0, provides a wallpaper having an air purification function characterized in that the liquid stability is high, no precipitate is formed at 0 to 80 ℃.

In addition, the purification layer provides a wallpaper having an air purification function characterized by being formed by coating or spraying a mixture of a purification composition and a binder.

As described above, the wallpaper having an air purifying function according to the present invention contains a composition formed of an inorganic material, thereby removing radical causes of decomposition and odor of volatile organic compounds and suppressing various bacteria.

In addition, the purification composition contained in the wallpaper of the present invention has a high stability, so precipitation is not generated, and thus, the manufacturing processability is high.

1 is a process diagram showing a method of manufacturing a purification composition according to the present invention.
2 is a view showing a cross-section of a wallpaper having an air purifying function according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that, among the drawings, the same components or parts indicate the same reference numerals as possible. In describing the present invention, detailed descriptions of related known functions or configurations will be omitted so as not to obscure the subject matter of the present invention.

As used herein, the terms 'about', 'substantially', etc. are used in or at a value close to that value when manufacturing and substance tolerances specific to the stated meaning are presented, and the understanding of the invention To aid, accurate or absolute figures are used to prevent unconscionable abusers from unduly using the disclosed disclosure.

1 is a process diagram showing a method of manufacturing a purification composition according to the present invention, Figure 2 is a view showing a cross-sectional view of the wallpaper having an air purifying function according to the present invention.

The present invention relates to a wallpaper having an air purification function in which a purification layer 200 capable of purifying air is formed on a sheet 100 for wallpaper as shown in FIG. 2.

The sheet for wallpaper 100 may be used as any sheet paper that can be used as wallpaper, it will be preferable to be any one of paper, fabric, knitted fabric, non-woven fabric.

The purification layer 200 is a layer containing a purification composition containing calcium chloride, copper chloride, and iron salt.

Through the purification composition included in the purification layer 200, functions of decomposing volatile organic compounds and removing odors are provided.

The purification composition is prepared by including a raw material mixing step, a catalyst mixing step, a reaction step, and a cooling step, as shown in FIG. 1.

The purification composition of the present invention contains 1 to 9% by weight of calcium chloride, 0.1 to 9% by weight of copper chloride, and 0.1 to 3% by weight of iron salt. Is added.

The calcium chloride, copper chloride, and iron salts contained in the purification composition have deodorizing properties and decomposition ability of volatile organic compounds, respectively, and are excellent in removing specific deodorizing substances and specific volatile organic compounds.

The copper chloride may be monovalent copper (I) chloride, divalent copper (II) chloride, or the like, and divalent copper (II) chloride may be preferably used.

The calcium chloride, copper chloride, and iron salts may use hydrates to increase the solubility of water.

When the calcium chloride, copper chloride, iron salt of the purification composition is added below the content range, air purification performance and deodorization function may be deteriorated, and when it exceeds the content range, low temperature below 0 ° C or 40 ~ 80 ° C When the precipitate is generated in the composition at a high temperature of, it is possible to reduce the manufacturing processability when forming a purification layer on the wallpaper.

When the content of copper chloride is high, the air purifying function and deodorizing function are increased, but yellowing may occur in the purifying composition or wallpaper containing the purifying composition, so it is necessary to adjust the content according to the place of use and purpose of use. However, it is preferable to use 2% by weight or less when manufacturing a light colored wallpaper.

Chloride substances contained in the purification composition decompose volatile organic compounds (VOCs) and harmful substances in the air through oxidizing action with Mcl ₂ (M is a transition metal such as Mn, Zn, Cu), which is an active component of multi metal sol, It has a mechanism to decompose cell membranes by acting directly on harmful bacteria and disinfecting the electron transport system of harmful bacteria.

In other words, the Mcl ₂ melts the cell membrane of harmful bacteria and works with enzymes in the cell to block the metabolic function of nutrients, that is, the influx and discharge of nutrients, and prevents the breathing function of harmful bacteria, thereby causing intracellular APT (adenosine triphosphate, adenosine triphosphate) It inhibits production, destroys growth stop and regeneration ability, and kills harmful bacteria.

In addition, Mcl ₂ is a strong reactive substance that fundamentally removes harmful gas components by decomposing or changing odor components and neutral odor components into odorless compounds through chemical reactions such as oxidation, reduction and neutralization with basic odor components and neutral odor components. Is done.

[Ammonia decomposition mechanism]

2NH ₃ + H ₂ + Mcl ₂ → 2NH ₄ cl (ammonium chloride) + M

Mcl ₂ is a metal with a very high electropositivity, and causes a reduction reaction that generates hydrogen (H) from water molecules in the air, and reacts with ammonia (2NH ₃ ) gas to make ammonium salt, an odorless ammonium salt, Ammonium Chloride (NH ₄ cl) To remove malodor.

[Formaldehyde decomposition mechanism]

HCHO (formaldehyde) + Mcl ₂ → HCO ₃ (Bicarbonate) + M + H ₂ ↑

Mcl ₂ causes a reduction reaction that generates hydrogen (H) from water molecules in the air. At this time, it reacts with formaldehyde gas, which is a neutral odor, to convert into bicarbonate (bicarbonate), a harmless component, to decompose HCHO (formaldehyde). Do it.

In the raw material mixing step, glycine may be further added as a buffering agent in order to increase reaction stability in the reaction step.

When adding the glycine, it will be preferable to add 0.5 to 2 parts by weight to 100 parts by weight of water.

The catalyst mixing step is a step of further adding a catalyst, a pH adjusting agent, and a metal ion blocker to the composition in which the raw materials are mixed.

In the catalyst mixing step, it may be possible to use imidazole as a catalyst, formic acid as a pH regulator, and EDTA-2Na dihydrate as a metal ion blocker.

The catalyst, pH adjusting agent, and metal ion blocker will preferably add 0.3 to 2 parts by weight to 100 parts by weight of water, respectively.

The reaction step is a step of reacting a composition in which a raw material and a catalyst are mixed at 40 to 80 ° C. for 90 to 150 minutes, and it is important to stably stir during the reaction so that the composition can stably react.

The cooling step is a step in which the reaction-completed composition is left at room temperature or cooled under low temperature.

After the cooling step, it may be possible to conduct a inspection step of dropping sodium hydroxide and inspecting the amount of precipitates generated.

The purification composition of the present invention prepared as described above is preferably formed to a pH of 4.0 to 8.0. When the pH of the purification composition of the present invention is less than 4.0 or exceeds 8.0, precipitation may occur.

When precipitation occurs in the purification composition, the process of forming a purification layer containing the purification composition on the wallpaper may be reduced, and air purification performance may be reduced, so that the purification composition is not precipitated during manufacturing and storage of the purification composition. Will have to be manufactured.

The purification composition of the present invention prepared as described above may be mixed with a binder and then coated or sprayed onto a sheet of wallpaper for forming a purification layer.

As the binder, any of the binders harmless to the human body can be used, and various binders may be used depending on the purpose of use, such as an acrylic binder or a urethane binder, and it will be preferable to use Butyl Acrylate and Polyoxyethylene.

The adjustment ratio of the purification composition and the binder may be adjusted according to coating or spraying, but after mixing the purification composition and the binder in a weight ratio of 10:90 to 30:70, coating on one surface of the sheet for wallpaper forms a purification layer 200. You can do it.

In the case of forming a designed pattern on the sheet for wallpaper, a purified layer may be formed after the designed pattern is formed by printing or the like, or a pattern may be formed after forming the purified layer.

Alternatively, when the designed pattern is formed by printing, the pattern and the purification layer may be simultaneously formed by including a purification composition in a pigment for printing.

An adhesive layer may be formed on the wallpaper having the air purifying function according to the present invention as described above to form an adhesive sheet paper.

The adhesive layer may be formed by coating an adhesive used for wallpaper.

Hereinafter, an example of a method for manufacturing a wallpaper having an air purifying function according to the present invention is shown, but the present invention is not limited to the examples.

▣ Measurement method

All evaluations were performed by preparing the prepared wallpaper as a sample, and when a control group was required, a paper sheet for wallpaper with a basis weight of 90 gsm, which was not treated, was used as a control, and evaluated in a test environment at a temperature of 20 ° C and a humidity of 65% RH. .

1. Deodorization evaluation

* Measured by the method specified in the SEK mark mark textile product certification standard

2. Evaluation of removal of volatile organic compounds

(1) Formaldehyde removal evaluation

* Measured through the gas detection tube method, and injected with 20 μg / mL of formaldehyde (HCHO) into a 1000 mL container and measured.

-Test environment: temperature 20 ℃, humidity 65% R.H.

-Removal rate (%) = [(Blank gas concentration-Sample gas concentration) / Blank gas concentration] X100

(2) Other volatile organic compound removal evaluation

* As measured by gas chromatography (GC), a sample of 10 cm X 5 cm is placed in a 500 ml Erlenmeyer flask, sealed with a volatile organic compound whose initial concentration is adjusted, sealed, and sampled in Syringe after 2 hours, followed by GC measurement. Measure the concentration of volatile organic compounds

3. Antibacterial evaluation

* Antibacterial evaluation was performed by measuring Staphylococcus aureus (ATCC 6538) and pneumococcal Klebsiella pneumoniae (ATCC 4352) by measuring the reduction rate of bacterium after 6, 12 and 18 hours incubation.

◎ Purification Composition Preparation Examples 1 to 3

In the raw material mixing step, water was added as shown in Table 1 along with calcium chloride dihydrate, divalent copper chloride dihydrate, and iron salt.

In the catalyst mixing step, imidazole as a catalyst, formic acid as a pH regulator, and EDTA-2Na dihydrate as a metal ion blocker were further added to the composition in which the raw materials were mixed, and 0.8 parts by weight of 100 parts by weight of water was added.

The reaction step was reacted with stirring at 60 ° C for 120 minutes, and the reaction was completed and the purification composition of the present invention was prepared as a cooling step left at room temperature. The pH of the prepared purification composition is shown in Table 1.

division Preparation Example 1 Preparation Example 2 Preparation Example 3 Calcium chloride (% by weight) 7 10 15 Divalent copper chloride (% by weight) One 3 9 Iron salt (% by weight) 0.1 One 4 Composition pH 7.0 7.3 7.5

▣ Purification composition stability evaluation experiment

The purified composition prepared above was stored in a thermostat at a set temperature for 7 days and visually observed to confirm the state of the sediment and shown in Table 2. (X: No sediment, ○: Sediment generation)

Temperature (℃) Preparation Example 1 Preparation Example 2 Preparation Example 3 -One X X ○ 30 X X X 40 X X X 50 X X ○ 60 X X ○ 70 X X ○ 80 X X ○ 90 X ○ ○

As shown in Table 2, in the case of Preparation Examples 1 and 2, precipitates were not generated in the temperature range of 0 to 80 ° C, but in Preparation Example 3, precipitates were generated below 0 ° C or above 50 ° C. It can be seen that the stability of the composition is improved when the mobile dihydrate and the iron salt are contained in the range of 1 to 9% by weight of the calcium chloride dihydrate, 0.1 to 9% by weight of the copper chloride dihydrate, and 0.1 to 3% by weight of the iron salt, respectively.

◎ Wallpaper example with air purification function

The purification composition prepared in the above (Preparation Example 1) and an acrylic binder are mixed in a weight ratio of 20:80 and a purification layer is formed by coating on a paper sheet for wallpaper having a basis weight of 90 gsm to form a purification layer, so that the wallpaper has an air purifying function according to the present invention. Was prepared.

▣ Deodorization evaluation experiment

Table 3 shows the deodorizing properties of the wallpaper having the air purifying function prepared above. As a control, a paper sheet for wallpaper having a basis weight of 90 gsm, which was not treated, was used.

division Initial (ppm) 2 hours later (ppm) Decrease rate (%) Hydrogen sulfide gas Example 4.0 ≤0.08 98 Control 4.0 3.8 5 Pyridine gas Example 12 ≤1.0 91 Control 12 7.5 37.5 Ammonia gas Example 100 4.8 95 Control 100 79 21 Acetic acid gas Example 30 2.9 90.3 Control 30 23 23.3 Trimethylamine gas Example 30 0.9 97 Control 30 27 10 Isogilacetic acid gas Example 97% reduction after 2 hours Indole gas Example 95% reduction after 2 hours Nonenal gas Example 95% reduction after 2 hours

As shown in Table 3, the wallpaper having the air purifying function of the present invention has a hydrogen sulfide gas and a trimethylamine gas showing 99% reduction, and pyridine gas, ammonia gas, acetic acid gas, isogilacetic acid gas, indole gas, and Nonenal gas are all 90 It can be seen that the deodorizing property is very excellent by showing a reduction rate of% or more.

▣ Experiment for decomposition of volatile organic compounds

1. Measurement of formaldehyde removal rate

The formaldehyde removal rate was measured through the control of the wallpaper and the deodorization evaluation experiment having the air purification function prepared above and is shown in the table.

time Control Example 30 minutes 0% 85% 60 minutes 0% 90% 90 minutes 5% 95% or more 120 minutes 5% 95% or more

As shown in Table 4, it can be seen that the wallpaper having the air purifying function of the present invention has a very high value compared to the control group, and the formaldehyde removal efficiency is very good with a formaldehyde removal rate of 95% or more after 90 minutes.

2. Measurement of removal rate of other volatile organic compounds

The removal rate for volatile organic compounds other than formaldehyde is measured and shown in Table 5 through the control of the wallpaper and deodorization evaluation experiments having the air purification function prepared above.

matter Control
(ppb) Example
(ppb) 2-Butene 12.1 1.8 Acetonitrile 17.6 3.2 2-Methyl-2-propanol 2.9 0.3 Butanal 0.5 0 2-Butanone 3.7 0.6 Ethyl Acetate 2.2 0.3 Trichloromethane 1.8 0.4 Tetrahydro-Furan 2.1 0.4 2-Cyclopropyl-propane 1.1 0.1 Benzene 0.8 0 1,3,5-Trioxane 12.2 10.2 Methyl-Urea 335.1 0 N, N-Dimethyl-Formamide 9.6 2.4 2,4-Dimethyl-Hexane 3.5 0.3 N, N-Dimethyl-Acetamide 65.1 0.5 o-Xylene 4.6 0.4 Propylene Carbonate 6.0 0.3 2-Ethyl-1-hexanol 6.1 3.0

As shown in Table 5, the wallpaper having the air purifying function of the present invention has a lower concentration of volatile organic compounds than the control group, and it can be seen that the wallpaper having the air purifying function of the present invention effectively decomposes the volatile organic compounds.

▣ Antibacterial evaluation experiment

It is shown in Table 6 by evaluating the antibacterial properties for the wallpaper having the air purification function prepared above.

Strain Incubation time Example Staphylococcus aureus After 6 hours 75.3% 12 hours later 90.4% 18 hours later 99.9% Pneumococcal After 6 hours 70.1% 12 hours later 91.1% 18 hours later 99.9%

As shown in Table 6, it can be seen that the wallpaper having the air purifying function of the present invention has excellent antimicrobial properties. After 12 hours, the antibacterial property is 90% or more, and after 18 hours, it can be seen that the antibacterial property is excellent.

Claims (5)

A purification layer capable of purifying air is formed on the sheet of wallpaper.
The purification layer is a wallpaper having an air purifying function, characterized in that it comprises a purification composition containing calcium chloride, copper chloride, and iron salt. According to claim 1,
The wallpaper for the wallpaper is an air purifying function, characterized in that any one of paper, fabric, knitted fabric, non-woven fabric. According to claim 1,
The purification composition is a wallpaper having an air purification function, characterized in that the water contains 1 to 9% by weight of calcium chloride, 0.1 to 9% by weight of copper chloride, and 0.1 to 3% by weight of iron salt. According to claim 1,
The purification composition has a pH of 6.0 ~ 8.0, wallpaper having an air purification function, characterized in that the liquid stability is high, no precipitate is formed at 0 to 80 ℃. According to claim 1,
The purification layer is a wallpaper having an air purification function, characterized in that formed by coating or spraying a mixture of a purification composition and a binder.

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