KR20220096688A - Wallpaper and floor panel with excellent radon blocking effect - Google Patents

Abstract

The present invention relates to wallpaper and a flooring material for shielding radon, and provides a sheet for shielding radon which improves radon gas particle blocking performance by heat-sealing metal powder of fine particles to a conventional material exhibiting gas barrier properties and moisture barrier properties. In addition, the sheet for shielding radon of the present invention further includes a silicone coating layer to adhere to floors or walls used in manufacturing or construction of conventional building materials for a long time, so that provided are wallpaper and a flooring material that can maintain a safe indoor environment from radon.

Description

Radon shielding wallpaper and flooring {WALLPAPER AND FLOOR PANEL WITH EXCELLENT RADON BLOCKING EFFECT}

The present invention relates to radon shielding wallpaper and flooring. More specifically, to provide a radon shielding sheet that prevents the passage of radon gas particles by thermally fusion of fine particles of metal powder to a material exhibiting gas barrier properties and moisture barrier properties, which has excellent radon shielding function. Wallpaper and flooring can be provided.

It is known that about 50% of the annual natural radiation dose among the radiation doses exposed to the human body is due to radon, one of the radioactive substances. Radon is one of the natural radionuclides that exists in the natural environment. It is a colorless, odorless, inert gas that is produced by the decay of uranium several times and contained in rocks, soil, or building materials. Most of the human exposure to radiation by radon comes from the air.

Radon is mainly generated from soil, rocks, groundwater, building materials (gypsum board, etc.), and LNG gas (liquefied natural gas), and enters the indoor environment through cracks in the building floor and basement walls, water pipes, and gas pipes. do. In particular, when a building is constructed on soil that emits a lot of radon, radon is accumulated in the basement of the building, and when the accumulated radon flows into the building, radon is present in a high concentration in the internal air.

When radon is accumulated above the environmental standard for a long period of time, the high-energy alpha particles released during the alpha decay process of Po-214 and Po-218, which are decay products of radon inhaled into the lungs of the human body, are released into the lung base tissue. basal cells), leading to lung cancer. For reference, in the United States, it is known that about 19,000 people die each year from lung cancer caused by radon. Accordingly, the World Health Organization (WHO) and the US Environmental Protection Agency (EPA) stipulate that it is the second leading cause of lung cancer after smoking, and the WHO recommends an indoor radon concentration of 2.7 pCi/L. An indoor radon concentration of 4.0 pCi/L is recommended.

Most of the radon reduction technologies commonly used so far are technologies related to ventilation systems for emitting radon. However, since radon is introduced through cracks and crevices in buildings from the soil, there is a problem in that there is a limit to radon reduction through ventilation systems.

In addition, in recent years, as the functionality of indoor insulation, finishing materials, and eco-friendly building materials has been maximized, the indoor environment has greatly contributed to preventing the loss of heating and cooling energy due to high airtightness and high thermal degradation. Since the discharge is blocked, radon contained in the indoor air cannot escape to the outside, so there is a problem in that the concentration of radon contained in the indoor air is increased.

(Patent Document 1) KR 10-2019-0116973 B1

It is an object of the present invention to provide a radon shielding sheet having a radon shielding function to prevent radon gas particles from passing through.

Another object of the present invention is to further include a silicone coating layer that can be adhered for a long time by adhering the radon shielding sheet of the present invention to a floor or wall used in the manufacture or construction of conventional building materials, thereby maintaining a safe indoor environment from radon. To provide wallpaper and flooring.

In order to achieve the above object, a radon shielding sheet according to an embodiment of the present invention includes a metal sheet layer forming a metal powder on one surface of a base film and an inorganic powder layer forming an inorganic powder on one surface of the metal sheet layer do.

The base film is polyvinyl alcohol (PVA).

The metal sheet layer is formed by thermal fusion with a metal powder containing titanium (Ti) powder, and the average particle diameter of the metal powder is 8 μm to 18 μm.

The inorganic powder layer is coated with an inorganic powder selected from the group consisting of boron nitride, cerium oxide, titanium oxide, talc, aluminum oxide, iron oxide, mica, and mixtures thereof.

The radon shielding sheet further includes a silicone coating layer on one surface of the metal sheet layer.

The silicone coating layer is formed by applying a silicone coating solution to one surface of the metal sheet layer, and the silicone coating solution includes polysiloxane, a silicone oil represented by the following Chemical Formula 1, a silicone surfactant, a silane coupling agent, and a catalyst:

[Formula 1]

here,

p and q are integers from 1 to 100,

s is an integer from 1 to 10;

Wallpaper according to another embodiment of the present invention is manufactured including the radon shielding sheet.

The floor mat according to another embodiment of the present invention is manufactured including the radon shielding sheet.

A panel according to another embodiment of the present invention is manufactured including the radon shielding sheet.

Hereinafter, the present invention will be described in more detail.

Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the following embodiments. This example is provided to more completely explain the present invention to those of ordinary skill in the art. Accordingly, the formation of elements in the drawings has been exaggerated to emphasize a clearer description.

A radon shielding sheet according to an embodiment of the present invention includes a metal sheet layer forming a metal powder on one surface on a base film; and an inorganic powder layer forming an inorganic powder on one surface of the metal sheet layer.

The metal sheet layer is to form a metal powder on one side of the base film, and to prevent the phenomenon of radon radiation penetrating the body and radiating by using an inorganic material with a dense particle structure.

The inorganic powder layer is to form an inorganic powder on one surface of the metal sheet layer, and to show an antibacterial effect against bacteria (S. mutans, etc.) while blocking gaseous radon such as radon gas caused by contamination of structures .

The base film is polyvinyl alcohol (PVA), and the base film is a material having gas barrier properties and moisture barrier properties. do.

In addition, the radon shielding sheet of the present invention is defined as including all types that can be used by a person skilled in the art as a sheet type, a film type, a mat type, etc. depending on the usage environment.

The metal sheet layer is formed by thermal fusion with a metal powder containing titanium (Ti) powder, and the average particle diameter of the metal powder is 8 μm to 18 μm.

The metal sheet layer can be used without limitation as long as it contains a metal having excellent shielding properties against radon gas and harmful gases, for example, stainless steel, aluminum, titanium, zirconium, scandium, chromium, nickel, molybdenum, tungsten, and one or more metals selected from boron, preferably titanium.

In addition, the average particle diameter of titanium is 8 μm to 18 μm. When the average particle diameter of titanium is less than 8 μm, corona treatment of the surface of the formed metal sheet layer is difficult, and when it exceeds 18 μm, titanium is hardened and radon rosewood performance may be reduced.

The inorganic powder layer is coated with an inorganic powder selected from the group consisting of boron nitride, cerium oxide, titanium oxide, talc, aluminum oxide, iron oxide, mica, and mixtures thereof.

When the inorganic powder is used as the inorganic powder layer of the present invention, the inorganic powder itself may have excellent antibacterial properties against bacteria (S. mutans, etc.), that is, contamination resistance.

More preferably, the inorganic powder contains 20 to 60 parts by weight of titanium oxide and 20 to 60 parts by weight of aluminum oxide based on 100 parts by weight of the cerium oxide.

In the case of the above range, antibacterial and stain resistance can be greatly increased beyond a simple combination due to the interaction of the powders constituting the inorganic powder.

The radon shielding sheet further includes a silicone coating layer by applying a silicone coating solution after corona discharge treatment on one surface of the metal sheet layer.

The radon shielding sheet of the present invention is to apply a silicone coating solution to one side of the metal sheet layer, that is, to the side where the metal powder is not formed on the base film. will be.

The silicone coating solution includes polysiloxane, a silicone oil represented by the following formula (1), a silicone surfactant, a silane coupling agent, and a catalyst:

[Formula 1]

here,

p and q are integers from 1 to 100,

s is an integer from 1 to 10;

The polysiloxane is selected from the group consisting of alkenylpolysiloxanes, hydrogenated polysiloxanes, and mixtures thereof, and is preferably alkenylpolysiloxane, but is not limited thereto.

The catalyst is a platinum catalyst, but it is not limited to examples and any of them may be used without limitation.

Preferably, the silicone coating solution may include 1 to 15 parts by weight of silicone oil, 0.5 to 1 parts by weight of a silicone surfactant, 1 to 5 parts by weight of a silane coupling agent, and 0.01 to 0.05 parts by weight of a catalyst based on 100 parts by weight of polysiloxane. .

When used by coating the silicone coating solution within the above range, it is possible to form an adhesive layer with a minimized peel force and silicone transfer amount.

More preferably, the radon shielding sheet of the present invention may further include an adhesive layer on the surface of the silicone coating layer to which the silicone coating layer is applied after the silicone coating solution is applied.

When an adhesive layer is further included on the surface of the silicone coating layer to which the silicone coating solution is applied, when the radon shield sheet of the present invention is pressed and adhered, the bonding force between the silicone coating layer and the adhesive layer of the present invention is increased, thereby preventing the lifting phenomenon during adhesion It can be done, and the adhesive strength is excellent even when bonding for a long time.

The adhesive layer of the present invention is an epoxy compound represented by the following formula (2); Epoxy curing agents, phenoxy resins and inorganic fillers include:

[Formula 2]

here,

n is an integer from 1 to 10;

The epoxy compound further includes a norbornane group in addition to the epoxy group, so that it has excellent heat resistance and can improve adhesion.

The epoxy curing agent, specifically, as the epoxy curing agent, an amine curing agent, a guanidine-based curing agent, an imidazole-based curing agent, a phenol-based curing agent, and an acid anhydride-based curing agent may be used, and more specifically, a phenol-based curing agent containing a nitrogen atom is used. It is preferable to do

The radon shielding sheet of the present invention is a phenolic curing agent having a nitrogen atom in order to improve the required heat resistance, incombustibility, and adhesion in consideration of the fact that it is used by being attached to a floor or wall used in the manufacture or construction of a building material. may be used, and more specifically, 4,4'-diaminodiphenyl sulfone may be used.

The phenoxy resin is used for the purpose of assisting in film formation to maintain the adhesive composition in a solid state at room temperature, and specifically, a novolac-type phenoxy resin, a naphthalene-type phenoxy resin, a biphenyl-type phenoxy resin, etc. can These may be used independently and may be used combining plurality. It is preferable that the weight average molecular weight of a phenoxy resin is 30,000-70,000. These phenoxy resins are used to maintain the adhesive composition in a solid state at room temperature. Moreover, in order to prevent unexpected hardening from occurring by reaction, as a phenoxy resin, an unmodified thing is more preferable.

As the inorganic filler, silica, alumina, talc, mica, sericite, magnesium hydroxide, etc. may be used, but preferably talc may be used. By using the inorganic filler as one component of the adhesive layer, heat resistance can be improved.

The adhesive layer preferably includes an epoxy compound represented by the following formula (1), based on 100 parts by weight of the epoxy compound, 1 to 5 parts by weight of an epoxy curing agent, 10 to 50 parts by weight of a phenoxy resin, and 1 to 5 parts by weight of an inorganic filler include When according to the above range, excellent heat resistance, incombustibility and adhesion may be exhibited.

In general, the interior or exterior finishing of a building wall may be made of various materials such as stone, plaster, tile, wood panel, steel panel, gypsum board, wallpaper and flooring depending on the aesthetics of the interior of the building or the environment of use.

Wallpaper according to another embodiment of the present invention is manufactured including the radon shielding sheet.

The wallpaper is configured for aesthetics and safety in the interior of a building, and includes laminated wallpaper, silk wallpaper, and fabric wallpaper in which fabrics are laminated as various shapes and materials.

The floor mat according to another embodiment of the present invention is manufactured including the radon shielding sheet.

The floor mat is a type of flooring configured on the floor, and includes an elastic mat, a kitchen mat, an exercise mat, a playroom mat, a non-slip floor pad and a cushion mat.

A panel according to another embodiment of the present invention is manufactured including the radon shielding sheet.

The panel of the present invention aims to provide a building panel having an excellent radon shielding function in a building panel in which a plurality of panels are fixed to a wall and assembled with each other, and a temporary wall for building interior, office partition, hospital partition and includes partitions.

The radon shielding wallpaper and flooring of the present invention may include a radon shielding sheet that improves the radon gas particle blocking ability by thermally bonding fine metal powder to a material exhibiting gas barrier properties and moisture barrier properties in the prior art.

In addition, the radon shielding sheet of the present invention further includes a silicone coating layer, so that it can be adhered for a long time to the floor or wall used in the manufacture or construction of conventional building materials. can

Hereinafter, embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily carry out the present invention. However, the present invention may be embodied in several different forms and is not limited to the embodiments described herein.

[Preparation Example 1: Preparation of silicone coating solution]

Based on 100 parts by weight of alkenylpolysiloxane, 10 parts by weight of a silicone oil represented by the following Chemical Formula 1, 1 part by weight of a silicone surfactant, 1 part by weight of a silane coupling agent, and 0.01 parts by weight of a platinum catalyst were diluted in water to prepare a silicone coating solution.

[Formula 1]

here,

p is an integer of 50,

q is an integer of 15,

s is an integer of 10.

[Preparation Example 2: Preparation of adhesive composition]

an epoxy compound represented by the following formula (2); 4,4'-diaminodiphenyl sulfone; a phenol novolac resin containing a triazine structure having a weight average molecular weight of 50,000; and talc to prepare an adhesive composition.

The content ratio of the adhesive composition is shown in Table 1 below. The phenol novolak resin, talc and 4,4'-diaminodiphenyl sulfone were purchased and used, and the epoxy compound represented by Formula 2 was also purchased and used, and the weight average molecular weight was 8,800 to 22,000:

[Formula 2]

here,

n is an integer of 10.

ADC1 ADC2 ADC3 ADC4 ADC5 epoxy compound 100 100 100 100 100 hardener 0.5 One 3 5 7 phenoxy resin 5 10 30 50 70 inorganic filler 0.5 One 3 5 7

(unit parts by weight)

[Production Example 3: Preparation of sheet for radon shield]

In order to confirm the effect of the radon shielding sheet of the present invention, each of the following steps was configured to prepare a radon shielding sheet (RW1 to RW10).

Specifically, a metal sheet layer was formed by heat-sealing titanium powder having an average particle diameter of 5 μm on one surface of a polyvinyl alcohol (PVA) base film at 140° C. for 2 minutes.

Thereafter, an inorganic powder layer comprising 45 parts by weight of titanium oxide and 45 parts by weight of aluminum oxide was applied to the surface on which the titanium powder was formed, based on 100 parts by weight of cerium oxide to form an inorganic powder layer (RW1).

Manufacture of sheet RW2 for radon shielding

Except that the titanium powder was used to have an average diameter of 8 μm, it was prepared in the same manner as in RW1.

Manufacture of sheet RW3 for radon shielding

The titanium powder was prepared in the same manner as RW1, except that the average diameter was 18 μm.

Manufacture of sheet RW4 for radon shielding

Except that the titanium powder was used to have an average diameter of 20 μm, it was prepared in the same manner as in RW1.

Preparation of sheet RW5 for radon shielding

A metal sheet layer was formed by heat-sealing titanium powder having an average particle diameter of 8 μm on one surface of a polyvinyl alcohol (PVA) base film at 140° C. for 2 minutes. Then, an inorganic powder layer is formed by applying an inorganic powder comprising 45 parts by weight of titanium oxide and 45 parts by weight of aluminum oxide to 100 parts by weight of cerium oxide on one surface of the metal sheet layer, and corona discharge on the other surface of the metal sheet layer. After treatment, the silicone coating solution prepared in Preparation Example 1 was applied. Thereafter, it was dried at 1140° C. and heat-treated at 220° C. for 8 seconds to form a silicone coating layer.

ADC1 prepared in Preparation Example 2 was applied to the silicone coating layer to a thickness of 50 μm, dried at 100° C. for 2 minutes, and then dried at 150° C. for 2 minutes to form an adhesive layer.

Preparation of radon shielding sheet RW6

RW6 was manufactured in the same manner as RW5, except that ADC2 was used instead of ADC1.

Manufacture of sheet RW7 for radon shielding

RW7 was manufactured in the same manner as RW5, except that ADC3 was used instead of ADC1.

Preparation of radon shielding sheet RW8

RW8 was prepared in the same manner as RW5, except that ADC4 was used instead of ADC1.

Preparation of sheet RW9 for radon shielding

RW9 was prepared in the same manner as RW5, except that ADC5 was used instead of ADC1.

Manufacture of sheet RW10 for radon shielding

RW10 was prepared in the same manner as RW7, except that a silicone coating layer was not formed.

[Experimental Example 1: Radon shielding effect]

In order to confirm the radon shielding effect of the radon shielding sheets (RW1 to RW10) according to the present invention, the performance of the barrier material was evaluated with a radon reduction efficiency evaluation device (EHS Technology Research Center) according to the ISO/DIS 11665-10 standard.

The results are shown in Table 2 below.

RW1 RW2 RW3 RW4 RW5 RW6 RW7 RW8 RW9 RW10 Radon Reduction Efficiency 30 97 81 55 98 98 99 99 98 96

(unit: %)

According to Table 2, in the case of RW1 and RW4 including a metal sheet layer heat-sealed using titanium having an average particle diameter of 5 μm and 20 μm, a metal sheet layer heat-sealed using titanium having an average particle diameter of 8 μm and 18 μm was obtained. Compared to RW2 to RW3 and RW5 to RW10, it was confirmed that the radon reduction efficiency was significantly reduced.

It was confirmed that the radon shielding effect was excellent when a metal sheet layer heat-sealed using titanium having an average particle diameter of 8 μm and 18 μm was included.

[Experimental Example 2: Adhesion evaluation]

In order to confirm the evaluation of the adhesiveness of the radon shielding sheet according to the present invention, it was evaluated whether a lifting phenomenon occurred after attaching the sheet to the wall,

When the sheet is attached, the lifting phenomenon is directly connected to the heat resistance of the sheet and the heat resistance of the adhesive layer, and it can be easily checked with the naked eye.

In order to proceed with the objective evaluation, 20 each of RW1 to RW10 radon shielding sheets were attached to the wall used for building construction, and it was checked whether the lifting phenomenon occurred, and the number of sheets on which the lifting phenomenon occurred was less than one. Cases were indicated by X, in the case of 1 to 5, by △, and in the case of more than 5 by O.

RW1 RW2 RW3 RW4 RW5 RW6 RW7 RW8 RW9 RW10 Lifting occurs O △ O △ △ △ X X △ O

According to Table 3, RW7 to RW8 including an adhesive layer made of the adhesive composition of ADC3 to ADC4 did not cause any lifting when attached to a wall, but RW1 did not include an adhesive layer or did not apply a silicone coating solution, In RW3 and RW10, it was confirmed that the lifting phenomenon occurred in excess of five.

In the case of RW5 to RW9 including the adhesive layer by the adhesive composition of ADC1 to ADC3, the lifting phenomenon occurred to 5 or less, but considering the production efficiency, RW5 to RW6 showed a high defect rate of up to 25%. .

In addition, when comparing the cases of RW7 and RW10 containing the same adhesive composition ADC3, in the case of RW10 that does not form the silicone coating solution of the present invention, compared to RW7 forming the silicone coating solution, more than 5 lifting phenomena occur. confirmed that.

This increases the bonding strength between the silicone coating layer and the adhesive layer of the present invention, and thus it is possible to prevent a lifting phenomenon when bonding the sheet, and it was confirmed that the adhesive strength is excellent even during bonding.

[Experimental Example 3: Heat resistance evaluation]

In order to confirm the evaluation of the heat resistance of the radon shielding sheet according to the present invention, after exposure to soldering heat of 260° C. for 180 seconds, the occurrence of swelling (heat resistance test for soldering heat according to JIS C6484) was conducted.

If swelling occurred, it was indicated by O, and if it did not occur, it was indicated by X.

RW1 RW2 RW3 RW4 RW5 RW6 RW7 RW8 RW9 RW10 bloating occurs O O O O X X X X X O

As shown in Table 4, in RW5 to RW9, swelling did not occur as a result of the heat resistance test. In other experimental results, it was visually confirmed that swelling occurred.

Through the above experiment, it means that the heat resistance of the radon shielding sheet of the present invention is comprehensively affected by the formation of the silicone release layer and the composition of the adhesive layer.

[Experimental Example 4: Performance evaluation of radon shielding sheet]

The indoor air quality was evaluated by attaching the radon shielding sheets RW7 and RW8 having the radon shielding function of the present invention, which confirmed the excellent effect through Experimental Examples 1 to 3, to the wall of the building.

Permeability (%), barrier properties (Bq/m ³ ), formaldehyde (mg/mh), toluene (mg/mh), TVOC (mg/mh), and radon reduction efficiency (%) were evaluated as performance indicators of air quality. As a control, using Hyundai L&C's 'Hyundai Window Film (a functional product with improved sun-shielding function and heat-blocking performance based on sputtering technology and nano-ceramic inorganic compound coating method as a source)', the index is shown in Table 5 below.

For comparison, the effect of the 'Hyundai Window Film' product was compared with an index of 5. For radon, ES 02901.1c continuous measurement of radon in indoor air was used.

The results are shown in Table 5 below.

control RW7 RW8 performance evaluation 5 8 9

(Unit: Index)

As shown in Table 5, the radon shielding sheets RW7 and RW8 of the present invention, which confirmed the excellent effect through Experimental Examples 1 to 3, have an excellent effect on indoor air quality compared to the control, even when attached to a building wall and used. Confirmed.

Although preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims are also provided. is within the scope of the

Claims (9)

a metal sheet layer forming a metal powder on one surface of the base film; and
an inorganic powder layer forming an inorganic powder on one surface of the metal sheet layer; containing
Sheets for radon shielding. According to claim 1,
The base film is polyvinyl alcohol (PVA)
Sheets for radon shielding. According to claim 1,
The metal sheet layer is formed by thermal fusion with a metal powder containing titanium (Ti) powder,
The average particle diameter of the metal powder is 8 μm to 18 μm
Sheets for radon shielding. According to claim 1,
The inorganic powder layer is that an inorganic powder selected from the group consisting of boron nitride, cerium oxide, titanium oxide, talc, aluminum oxide, iron oxide, mica, and mixtures thereof is applied
Sheets for radon shielding. According to claim 1,
The radon shielding sheet further comprises a silicone coating layer on one surface of the metal sheet layer
Sheets for radon shielding. 6. The method of claim 5,
The silicone coating layer is formed by applying a silicone coating solution to one surface of the metal sheet layer,
The silicone coating solution includes polysiloxane, a silicone oil represented by the following Chemical Formula 1, a silicone surfactant, a silane coupling agent, and a catalyst.
Sheets for radon shielding:
[Formula 1]

here,
p and q are integers from 1 to 100,
s is an integer from 1 to 10; A radon shielding sheet comprising the sheet according to any one of claims 1 to 6
wallpaper. A radon shielding sheet comprising the sheet according to any one of claims 1 to 6
floor mat. A radon shielding sheet comprising the sheet according to any one of claims 1 to 6
panel.