KR102534064B1 - Wallpaper with air purification function - Google Patents

Abstract

In the present invention, a purifying layer capable of purifying air is formed on a sheet for wallpaper, and the purifying layer includes a purifying composition containing calcium chloride, copper chloride, and iron salt. It relates to a wallpaper having an air purifying function.

Description

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

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

In the environment we live in, the air is polluted by volatile organic compounds (VOCs; hereinafter referred to as 'VOCs') and various bacteria and fungi, and people spend most of the day indoors, but indoor environmental pollution There is a significant lack of awareness about the risk to the human body according to outdoor pollution, and it is difficult to remove volatile organic compounds indoors, and it is easy to create an environment in which bacteria and molds easily propagate.

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

In particular, benzene is a carcinogenic substance that causes leukemia and lymphoma, and toluene and xylene are known to damage the kidneys and liver and cause brain dysfunction when habitually inhaled (MOBachmann and JE Myers, Soc Sci Med 40, 245, 1995) These days, in the case of the United States and Japan, the environment-friendly regulation of these substances is implemented by the system called "Pollutant Release and Transfer Register (PRTR)" to discharge, move, and register environmental pollutants in their countries. By enacting the law, the European Union is managing through the REACH system applied since 2004, and Korea also manages volatile organic compounds through related laws, but it is difficult to evaluate the emission concentration of hazardous substances or research on reducing them. Countermeasures are still insufficient.

In addition, air pollution caused by bacteria and fungi causes odors in clothes and interior products that are widely used in real life, causing a lot of discomfort.

In addition, the sick house syndrome, which has been continuously reported in the media recently, is caused by the release of harmful substances such as volatile organic compounds from building materials such as wallpaper, furniture, and flooring, which lowers indoor air quality, causing serious harm not only to adults but also to children with weak physical resistance. are giving

Therefore, in recent years, public interest in the improvement of air quality has been increasing, and this social atmosphere requires eco-friendly products that are harmless to the human body and are pleasant for daily necessities as well as the surrounding living environment.

In general, wallpaper is used in a manner in which a wall of a building is formed with paper applied to the inner wall or ceiling of a building, a plastering operation is performed to smooth the surface, and the wallpaper is applied to the plastered wall to finish the interior.

Recently, in order to solve the above problems such as volatile organic compounds and bacteria, products with air purification, antibacterial, and deodorizing functions are being released. Korean Patent No. 1729364 uses porous clay minerals coated with photocatalysts. Wallpaper that effectively improves indoor air quality through porous clay minerals that are contained in wallpaper and have excellent pollutant adsorption capacity has been disclosed, and Korean Patent Registration No. 1133969 discloses that it can be used as a light source of not only sunlight but also incandescent and fluorescent lights indoors. An air purifying wallpaper capable of sufficiently exhibiting a photocatalytic action is disclosed.

Although the wallpaper as described above has an effect of removing harmful substances from the air through a photocatalyst, the photocatalyst has a low organic material adsorption rate, and air purification using the clay mineral takes too long time, so it is difficult to see a great effect in practice.

In addition, there is a problem in that light energy is required for the air purification function, so that no function can be performed in a dark night or in an empty room for a long time.

Therefore, there is an urgent need to develop a wallpaper that can effectively remove volatile organic compounds in the air and rapidly remove odors and causes of odors, and can be used indoors.

The present invention was invented to solve the problems of the prior art as described above, and has a high stability and high air purification function to decompose volatile organic compounds, remove the fundamental cause of odor, and suppress the growth of various bacteria. It is an object of the present invention to provide a wallpaper having a purification function.

In the present invention, a purifying layer capable of purifying air is formed on a sheet for wallpaper, and the purifying layer includes a purifying composition containing calcium chloride, copper chloride, and iron salt. A wallpaper having an air purifying function is provided.

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

In addition, the purifying 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 purifying composition provides a wallpaper having an air purifying function, characterized in that it has a pH of 4.0 to 8.0 and has high liquid stability without forming precipitate at 0 to 80 ° C.

In addition, the purifying layer provides a wallpaper having an air purifying function, characterized in that formed by coating or spraying a mixture of a purifying 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 eliminating the decomposition of volatile organic compounds and fundamental causes of odor, and suppressing the habitat of various bacteria.

In addition, the cleaning composition contained in the wallpaper of the present invention has high stability, so that precipitation does not occur, resulting in high manufacturing processability.

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

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. First of all, it should be noted that in the drawings, the same components or parts are denoted by the same reference numerals as much as possible. In describing the present invention, detailed descriptions of related known functions or configurations are omitted in order not to obscure the gist of the present invention.

As used herein, the terms 'about', 'substantially', and the like are used in a sense at or approximating that number when manufacturing and material tolerances inherent in the stated meaning are given, and are intended to convey an understanding of the present invention. Accurate or absolute figures are used to help prevent exploitation by unscrupulous infringers of the disclosed disclosure.

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

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

The wallpaper sheet 100 may be any sheet that can be used as a wallpaper, and preferably any one of paper, fabric, knitted fabric, and nonwoven fabric.

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

The purification composition included in the purification layer 200 provides functions of decomposing volatile organic compounds and removing odors.

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

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 in water, and the amount of calcium chloride, copper chloride, and iron salt in water is adjusted in the raw material mixing step. add

The calcium chloride, copper chloride, and iron salt contained in the purification composition each have a deodorizing ability and a decomposition ability of volatile organic compounds, and each has an excellent ability to remove a specific deodorizing substance and a specific volatile organic compound.

As the copper chloride, monovalent copper chloride (I), divalent copper chloride (II), and the like may be used, and it is preferable to use divalent copper chloride (II).

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

When the calcium chloride, copper chloride, and iron salt of the purification composition are added in an amount less than the above content range, air purifying performance and deodorizing function may be deteriorated. At high temperatures, precipitates are generated in the composition, which can deteriorate manufacturing processability when forming a purification layer on wallpaper.

When the copper chloride content is high, the air purifying function and deodorizing function increase, but since yellowing may occur in the purifying composition or wallpaper containing the purifying composition, it is necessary to adjust the content according to the place and purpose of use, and general white However, when producing light-colored wallpaper, it would be preferable to use less than 2% by weight.

Chlorinated substances contained in the purification composition decompose volatile organic compounds (VOCs) and harmful substances in the air through oxidation with Mcl ₂ (M is a transition metal such as Mn, Zn, Cu, etc.), which is an active ingredient of multi metal sol, It acts directly on harmful bacteria to break down cell membranes and has a mechanism to eliminate harmful bacteria by interfering with their electron transport system.

That is, the Mcl ₂ dissolves the cell membrane of harmful bacteria, acts with intracellular enzymes, blocks the metabolic function of nutrients, that is, the inflow and outflow of nutrients, and prevents the respiratory function of harmful bacteria, so that intracellular APT (adenosine triphosphate) It kills harmful bacteria by suppressing their production and destroying growth and regeneration ability.

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

[Ammonia decomposition mechanism]

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

Mcl ₂ is a highly electropositive metal that causes a reduction reaction that generates hydrogen (H) from water molecules in the air and reacts with ammonia (2NH ₃ ) gas to produce Ammonium Chloride (NH ₄ cl), an odorless ammonium salt. to remove odors.

[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, and is converted into harmless component Bicarbonate (bicarbonate), which decomposes HCHO (formaldehyde). do

Glycine may be further added as a buffering agent to increase reaction stability in the reaction step in the raw material mixing 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 sequestering agent to a composition in which raw materials are mixed.

In the catalyst mixing step, imidazole as a catalyst, formic acid as a pH adjusting agent, and EDTA-2Na dihydrate as a sequestering agent for metal ions may be used.

It would be preferable to add 0.3 to 2 parts by weight of the catalyst, pH adjusting agent, and metal ion blocking agent to 100 parts by weight of water, respectively.

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

The cooling step is a step of leaving the reaction-completed composition at room temperature or cooling it at a low temperature.

After the cooling step, it will be possible to perform an inspection step of dropping sodium hydroxide and inspecting the amount of precipitate produced.

The pH of the purifying composition of the present invention prepared as described above is preferably formed at 4.0 to 8.0, and precipitation may occur when the pH of the purifying composition of the present invention is less than 4.0 or exceeds 8.0.

If precipitation occurs in the purification composition, the process of forming a purification layer containing the purification composition on wallpaper may be deteriorated, and air purification performance may be deteriorated. will have to be manufactured.

The purifying composition of the present invention prepared as described above may be mixed with a binder and then coated or sprayed on a wallpaper sheet to form a purifying layer.

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

The adjustment ratio of the cleaning composition and the binder may be adjusted by coating or spraying, but after mixing the cleaning composition and the binder at a weight ratio of 10:90 to 30:70, the cleaning composition and the binder are coated on one side of the wallpaper sheet to form the cleaning layer 200. will be able to do

When a pattern designed on the wallpaper sheet is formed, a purification layer may be formed after the designed pattern is formed by printing or the like, or a pattern may be formed after the purification layer is formed.

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

It will be possible to form an adhesive sheet by forming an adhesive layer on the wallpaper having an air purifying function according to the present invention as described above.

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

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

▣ Measurement method

For all evaluations, the manufactured wallpaper was prepared as a sample and evaluated. If a control group was needed, a paper sheet for wallpaper with a basis weight of 90 gsm without any treatment was used as a control group, and the evaluation was conducted in a test environment of a temperature of 20 ° C and a humidity of 65% R.H. .

1. Deodorization evaluation

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

2. Evaluation of removal of volatile organic compounds

(1) Evaluation of formaldehyde removal

* Measured through the gas detection tube method, measured by injecting 20 μg/mL of formaldehyde (HCHO) into a 1000 mL container

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

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

(2) Evaluation of removal of other volatile organic compounds

* Measured through the GC (gas chromatography) method, put a 10 cm X 5 cm sample in a 500 ml Erlenmeyer flask, add volatile organic compounds of which the initial concentration was adjusted, seal, and after sampling in Syringe after 2 hours, GC measurement Measure the concentration of volatile organic compounds

3. Antimicrobial evaluation

* Antibacterial activity was evaluated by measuring the bacteriostatic reduction rate after culturing Staphylococcus aureus (ATCC 6538) and Klebsiella pneumoniae (ATCC 4352) for 6 hours, 12 hours, and 18 hours.

◎ Purification composition preparation examples 1 to 3

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

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

The reaction step was reacted while stirring at 60 ° C. for 120 minutes, and the cleaning composition of the present invention was prepared in a cooling step in which the reaction was completed and 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 Test

The purification composition prepared above was stored in a thermostat at the set temperature for 7 days, and then visually observed to confirm the state of the precipitate, and it is shown in Table 2. (X: no precipitate, ○: precipitate generated)

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, no precipitate was generated in the temperature range of 0 to 80 ° C, but in Preparation Example 3, a precipitate was generated at less than 0 ° C or above 50 ° C, and calcium chloride dihydrate, chlorinating agent It can be seen that the stability of the composition is improved when the mobile dihydrate and iron salt are contained in the range of 1 to 9 wt% of calcium chloride dihydrate, 0.1 to 9 wt% of cupric chloride dihydrate, and 0.1 to 3 wt% of iron salt, respectively.

◎ Example of a wallpaper having an air purifying function

The above-prepared purifying composition (Preparation Example 1) was mixed with an acrylic binder in a weight ratio of 20:80, and a purifying layer was formed by coating through printing on a paper sheet for wallpaper having a basis weight of 90 gsm to form a wallpaper having an air purifying function according to the present invention. was manufactured.

▣ Deodorization evaluation test

The deodorization of the wallpaper having the air purifying function prepared above was evaluated and shown in Table 3. As a control, a paper sheet for wallpaper having a basis weight of 90 gsm without any treatment was used.

division Initial (ppm) After 2 hours (ppm) Decrease rate (%) hydrogen sulfide gas Example 4.0 ≤0.08 98 control group 4.0 3.8 5 pyridine gas Example 12 ≤1.0 91 control group 12 7.5 37.5 ammonia gas Example 100 4.8 95 control group 100 79 21 acetic acid gas Example 30 2.9 90.3 control group 30 23 23.3 trimethylamine gas Example 30 0.9 97 control group 30 27 10 isovaleric 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 an air purifying function of the present invention shows a 99% reduction rate for hydrogen sulfide gas and trimethylamine gas, and 90% for pyridine gas, ammonia gas, acetic acid gas, isovaleric acid gas, indole gas, and Nonenal gas. It can be seen that the deodorization property is very excellent by showing a reduction rate of % or more.

▣ Volatile Organic Compound Decomposition Test

1. Measurement of formaldehyde removal rate

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

hour control group 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 an air purifying function of the present invention has a very high formaldehyde removal efficiency of 95% or more after 90 minutes, which is a very high value compared to the control group.

2. Measurement of other volatile organic compound removal rates

Table 5 shows the removal rate of volatile organic compounds other than formaldehyde through the prepared wallpaper having an air purifying function and the control group of the deodorization evaluation experiment.

matter control group
(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 an air purifying function of the present invention has a lower concentration of volatile organic compounds than the control, and it can be seen that the wallpaper having an air purifying function of the present invention effectively decomposes volatile organic compounds.

▣ Antibacterial evaluation test

The antibacterial properties of the wallpaper having an air purifying function prepared above were evaluated and are shown in Table 6.

strain incubation time Example Staphylococcus aureus 6 hours later 75.3% after 12 hours 90.4% 18 hours later 99.9% pneumococci 6 hours later 70.1% after 12 hours 91.1% 18 hours later 99.9%

As shown in Table 6, it can be seen that the wallpaper having an air purifying function of the present invention has excellent antibacterial properties.

Claims (5)

A purification layer capable of purifying the air is formed on the wallpaper sheet,
The purification layer includes a purification composition containing calcium chloride, copper chloride, and iron salt,
The purification composition contains 7 to 9% by weight of calcium chloride, 1 to 3% by weight of copper chloride, and 0.1 to 1% by weight of iron salt in water, has a pH of 7.0 to 7.3, and has high liquid stability at 0 to 80 ° C. Wallpaper having an air purifying function, characterized in that. According to claim 1,
Wallpaper having an air purifying function, characterized in that the sheet for wallpaper is any one of paper, woven fabric, knitted fabric, and non-woven fabric. delete delete According to claim 1,
Wallpaper having an air purifying function, characterized in that the purifying layer is formed by coating or spraying a mixture of a purifying composition and a binder.

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