KR102496420B1 - Wallpaper and floor panel with excellent radon blocking effect - Google Patents

Abstract

The present invention relates to wallpaper and flooring materials for shielding radon, and it is possible to provide a sheet for shielding radon that improves radon gas particle blocking ability by heat-sealing metal powder of fine particles to a conventional material exhibiting gas barrier properties and moisture barrier properties. there is.
In addition, the radon shielding sheet of the present invention further includes a silicone coating layer and can be adhered for a long time to floors or walls used in the manufacture or construction of conventional building materials, providing wallpaper and flooring that can maintain a safe indoor environment from radon. can

Description

Wallpaper and flooring for radon shielding {WALLPAPER AND FLOOR PANEL WITH EXCELLENT RADON BLOCKING EFFECT}

The present invention relates to wallpaper and flooring for radon shielding. More specifically, to provide a radon shielding sheet that prevents radon gas particles from passing by heat-sealing fine-particle metal powder to a material exhibiting conventional gas barrier and moisture barrier properties, for radon shielding with excellent radon shielding function. Wallpaper and flooring can be provided.

It is known that about 50% of the annual natural radiation dose of the amount of radiation exposed to the human body is caused by radon, one of radioactive substances. Radon is one of the natural radionuclides that exist in the natural environment. It is a colorless and odorless inert gas that is produced by the decay of uranium several times and is contained in rocks, soil, or building materials. Most of the radiation exposure of the human body by radon is 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 building floors and basement walls, water pipes, and gas pipes. do. In particular, when a building is constructed in soil where a large amount of radon is emitted, radon is accumulated in the basement of the building, and when the accumulated radon is introduced into the building, radon is present in the air at a high concentration.

When radon accumulates above the environmental standard for a long period of time, high-energy alpha particles emitted during the alpha decay process of Po-214 and Po-218, which are the decay products of radon inhaled into the human lung, are released into the lung tissue (lung). It also destroys basal cells and causes lung cancer. For reference, it is known that about 19,000 people die from lung cancer caused by radon every year in the United States. Accordingly, the World Health Organization (WHO) and the US Environmental Protection Agency (EPA) define it as the main cause of lung cancer after smoking, and the WHO recommends an indoor radon concentration of 2.7 pCi/L. The recommended indoor radon concentration is 4.0 pCi/L.

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

In addition, recently, as the functionality of indoor insulation materials, finishing materials, and eco-friendly building materials has been maximized, the indoor environment has become highly airtight and highly degraded, contributing greatly to preventing loss of cooling and heating energy. 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 increases.

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

An object of the present invention is 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 capable of long-term adhesion by attaching the radon shielding sheet of the present invention to floors or walls used in the manufacture or construction of conventional building materials, which can maintain 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 for forming metal powder on one surface of a base film and an inorganic powder layer for forming 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 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 silicon coating layer on one surface of the metal sheet layer.

The silicone coating layer is formed by applying a silicone coating liquid to one surface of the metal sheet layer, and the silicone coating liquid includes polysiloxane, silicone oil represented by Formula 1 below, 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 by including the radon shielding sheet.

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

A panel according to another embodiment of the present invention is manufactured by 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 examples. This embodiment is provided to more completely explain the present invention to those skilled in the art. Accordingly, the formation of elements in the figures has been exaggerated to emphasize clearer description.

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

The metal sheet layer is to form metal powder on one side of the base film, and uses an inorganic material having a dense particle structure to prevent radon radiation from being emitted through the body.

The inorganic powder layer is to form inorganic powder on one surface of the metal sheet layer, to exhibit an antibacterial effect against bacteria (S.mutans, etc.) while blocking gaseous radon such as radon gas generated from contamination of the structure. .

The base film is polyvinyl alcohol (PVA), and the base film is a material having gas barrier properties and moisture barrier properties, and is defined as including all types of materials that can be used by those skilled in the art. do.

In addition, the radon shielding sheet of the present invention is defined as including all forms that can be used by those skilled in the art in the form of a sheet, film, and mat according to the use environment.

The metal sheet layer is formed by thermal fusion with 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 may be used without limitation as long as it includes 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 may include one or more metals selected from boron, preferably titanium.

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

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 antibacterial property of the inorganic powder itself against bacteria (S.

More preferably, the inorganic powder includes 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, the interaction of the powders constituting the inorganic powder can greatly increase antibacterial and fouling resistance beyond simple combination, and when it is applied and used as an inorganic powder layer, it can have fouling resistance.

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

The radon shielding sheet of the present invention is to apply a silicone coating liquid to one surface of the metal sheet layer, that is, to the surface on which the metal powder is not formed on the base film, the silicone coating liquid is coated to prevent the occurrence of a lifting phenomenon during adhesion will be.

The silicone coating solution includes polysiloxane, silicone oil represented by Formula 1 below, 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 alkenylpolysiloxane, hydrogenated polysiloxane, and mixtures thereof, and is preferably an alkenylpolysiloxane, but is not limited to the above examples.

The catalyst is a platinum catalyst, but is not limited to the examples and can be used without limitation.

Preferably, the silicone coating solution may include 1 to 15 parts by weight of silicone oil, 0.5 to 1 part 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 the silicone coating liquid is coated and used within the above range, it is possible to form an adhesive layer with minimized peeling 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 applying the silicone coating solution.

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 shielding sheet of the present invention is pressed and adhered, the bonding strength between the silicone coating layer and the adhesive layer of the present invention increases, preventing lifting during adhesion. It can be done, and it is to ensure that 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 Formula 2; Epoxy curing agent, phenoxy resin and inorganic filler:

[Formula 2]

here,

n is an integer from 1 to 10;

Since the epoxy compound further includes a norbornane group in addition to the epoxy group, it has excellent heat resistance and can improve adhesiveness.

Specifically, as the epoxy curing agent, an amine-based 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 desirable to do

In view of the fact that the radon shielding sheet of the present invention is used by being adhered to the floor or wall used in the manufacture or construction of building materials, in order to improve the required heat resistance, incombustibility, and adhesiveness, a phenol-based curing agent having a nitrogen atom may be used, and more specifically, 4,4'-diaminodiphenyl sulfone may be used.

The phenoxy resin is used for the purpose of assisting film formation to maintain the adhesive composition in a solid state at room temperature, and specifically includes novolak-type phenoxy resin, naphthalene-type phenoxy resin, biphenyl-type phenoxy resin, and the like. can These may be used independently or may be used combining plurality. The weight average molecular weight of the phenoxy resin is preferably 30,000 to 70,000. These phenoxy resins are used to keep the adhesive composition in a solid state at room temperature. Moreover, in order to prevent unexpected hardening by reaction from occurring, 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. Heat resistance can be improved by using the inorganic filler as one component of the adhesive layer.

The adhesive layer preferably includes an epoxy compound represented by Formula 1 below, 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 In the case of the above range, excellent heat resistance, incombustibility and adhesiveness may be exhibited.

In general, the interior or exterior finish 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 use environment.

Wallpaper according to another embodiment of the present invention is manufactured by 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 in various shapes and materials.

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

The floor mat is in the form of a flooring material formed on the floor, and includes an elastic mat, a kitchen mat, an exercise mat, a playroom mat, a non-slip floor mat, and a cushion mat.

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

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

The radon shielding wallpaper and flooring of the present invention may include a radon shielding sheet that improves radon gas particle blocking ability by heat-sealing metal powder of fine particles to a conventional material exhibiting gas barrier properties and moisture barrier properties.

In addition, the radon shielding sheet of the present invention further includes a silicone coating layer and can be adhered for a long time to floors or walls used in the manufacture or construction of conventional building materials, providing wallpaper and flooring capable of maintaining a safe indoor environment from radon. can

Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention may be embodied in many 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 silicone oil represented by Formula 1, 1 part by weight of silicone surfactant, 1 part by weight of silane coupling agent, and 0.01 part by weight of 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.

[Production Example 2: Preparation of adhesive composition]

An epoxy compound represented by Formula 2 below; 4,4'-diaminodiphenyl sulfone; a triazine structure-containing phenol novolak resin having a weight average molecular weight of 50,000; And talc was mixed 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 an 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 curing agent 0.5 One 3 5 7 phenoxy resin 5 10 30 50 70 inorganic filler 0.5 One 3 5 7

(unit weight parts)

[Production Example 3: Production of radon shielding sheet]

In order to confirm the effect of the radon shielding sheet of the present invention, radon shielding sheets (RW1 to RW10) were prepared by configuring each of the following steps.

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

Thereafter, an inorganic powder layer was formed (RW1) by applying an inorganic powder containing 45 parts by weight of titanium oxide and 45 parts by weight of aluminum oxide with respect to 100 parts by weight of cerium oxide on one surface on which the titanium powder was formed.

Manufacture of sheet RW2 for radon shielding

It was prepared in the same manner as RW1, except that the titanium powder had an average diameter of 8 μm.

Manufacture of radon shielding sheet RW3

It was prepared in the same manner as RW1, except that the titanium powder had an average diameter of 18 μm.

Manufacture of radon shielding sheet RW4

It was prepared in the same manner as RW1, except that the titanium powder had an average diameter of 20 μm.

Manufacture of radon shielding sheet RW5

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

Manufacture of radon shielding sheet RW6

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

Manufacture of radon shielding sheet RW7

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

Manufacture of sheet RW8 for radon shielding

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

Manufacture of radon shielding sheet RW9

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

Manufacture of radon shielding sheet RW10

RW10 was prepared in the same manner as RW7, except that the 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 using a radon reduction efficiency evaluation device (EHS Research Institute) 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 metal sheet layers thermally welded using titanium having average particle diameters of 5 μm and 20 μm, metal sheet layers thermally welded using titanium having average particle diameters of 8 μm and 18 μm Compared to the included RW2 to RW3 and RW5 to RW10, it was confirmed that the radon reduction efficiency was greatly reduced.

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

[Experimental Example 2: Adhesion Evaluation]

In order to confirm the evaluation of the adhesiveness of the radon shielding sheet according to the present invention, an evaluation was conducted as to whether or not a lifting phenomenon occurred after attaching the sheet to the wall.

The occurrence of lifting when attaching the sheet is a part that is directly connected to the heat resistance of the sheet and the adhesive layer, and can be easily confirmed with the naked eye, and the sheet with the lifting phenomenon cannot be used as a defective product.

In order to conduct an objective evaluation, 20 radon shielding sheets of RW1 to RW10 were attached to the wall used for building construction, and it was confirmed whether the lifting phenomenon occurred, and the number of sheets with lifting phenomenon was less than 1 The case was indicated by X, the case of 1 to 5 was indicated by △, and the case of more than 5 was indicated by O.

RW1 RW2 RW3 RW4 RW5 RW6 RW7 RW8 RW9 RW10 Excitation 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; RW3 and RW10 confirmed that the lifting phenomenon occurred in excess of 5.

In the case of RW5 to RW9 including the adhesive layer by the adhesive composition of ADC1 to ADC3, the lifting phenomenon occurred in less than 5, but considering the production efficiency, RW5 to RW6 show 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 without forming the silicone coating liquid of the present invention, compared to RW7 forming the silicone coating liquid, 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, which can prevent the lifting phenomenon during sheet bonding, and it was confirmed that the bonding strength is excellent even during bonding.

[Experimental Example 3: Heat Resistance Evaluation]

In order to confirm the heat resistance evaluation of the radon shielding sheet according to the present invention, after exposure to 260 ° C. of soldering heat for 180 seconds, whether or not a swelling phenomenon occurred (heat resistance test for soldering heat according to JIS C6484) was conducted.

When swelling occurred, it was marked as O, and when it did not occur, it was marked as X.

RW1 RW2 RW3 RW4 RW5 RW6 RW7 RW8 RW9 RW10 Occurrence of swelling O O O O X X X X X O

As shown in Table 4, no swelling occurred in RW5 to RW9 as a result of the heat resistance test. In other experimental results, it was visually confirmed that swelling occurred.

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

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

The radon shielding sheets RW7 and RW8 having the radon shielding function of the present invention, whose excellent effect was confirmed through Experimental Examples 1 to 3, were attached to the wall of a building to evaluate indoor air quality.

Permeability (%), barrier property (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, Hyundai L&C's 'Hyundai Window Film (a functional product with improved solar light shielding function and heat blocking performance based on sputter technology and nano ceramic inorganic compound coating method)' was used and expressed as an index as shown in Table 5 below,

For comparison, the effect of the 'Hyundai Window Film' product was compared by putting it as an index of 5. In the case of radon, ES 02901.1c radon continuous measurement method 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 have confirmed excellent effects through Experimental Examples 1 to 3, have an excellent effect on indoor air quality compared to the control even when attached to the wall of a building and used Confirmed.

Although the 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 of those skilled in the art using the basic concept of the present invention defined in the following claims are also made according to the present invention. falls within the scope of the rights of

Claims (9)

A metal sheet layer forming metal powder on one side of the base film; and
The metal sheet layer is a radon shielding sheet including an inorganic powder layer forming an inorganic powder on one surface,
The radon shielding sheet further includes a silicon coating layer on one surface of the metal sheet layer,
The silicone coating layer is formed by applying a silicone coating liquid to one surface of the metal sheet layer,
The silicone coating solution includes polysiloxane, silicone oil represented by Formula 1 below, a silicone surfactant, a silane coupling agent, and a catalyst,
The radon shielding sheet further includes an adhesive layer on one side of the silicone coating layer,
The adhesive layer includes an epoxy compound represented by Formula 2, an epoxy curing agent, a phenoxy resin, and an inorganic filler.
Sheets for radon shielding:
[Formula 1]

[Formula 2]

here,
p and q are integers from 1 to 100;
s is an integer from 1 to 10,
n is an integer from 1 to 10; According to claim 1,
The base film is polyvinyl alcohol (PVA)
Radon shielding sheet. According to claim 1,
The metal sheet layer is formed by thermal fusion with metal powder containing titanium (Ti) powder,
The average particle diameter of the metal powder is 8μm to 18μm
Radon shielding sheet. According to claim 1,
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.
Radon shielding sheet. delete delete Claims 1 to 4, comprising a radon shielding sheet according to any one of the preceding
wallpaper. Claims 1 to 4, comprising a radon shielding sheet according to any one of the preceding
floor mat. Claims 1 to 4, comprising a radon shielding sheet according to any one of the preceding
panel.