KR102241430B1 - Method for preparing film and film with excellent radon blocking effect - Google Patents

Abstract

The present invention relates to a film having a radon shielding function and a manufacturing method thereof. The ability to shield radon gas particles can be improved by thermally bonding fine metal powder to a conventional material exhibiting gas barrier properties and moisture barrier properties. In addition, by applying a silicone coating solution to the other side of a surface on which the metal powder is sealed with the heat, it is possible to adhere for a long time to the floor or wall used in the manufacture or construction of conventional building materials, thereby maintaining a safe indoor environment from radon.

Description

Film having radon shielding function and its manufacturing method {METHOD FOR PREPARING FILM AND FILM WITH EXCELLENT RADON BLOCKING EFFECT}

The present invention relates to a film having a radon shielding function and a method of manufacturing the same. In more detail, it relates to a film having excellent radon shielding function and a manufacturing method thereof by thermally fusion bonding a metal powder of fine particles to a material exhibiting conventional gas barrier properties and moisture barrier properties to prevent the radon gas particles from passing through.

In general, the human body is exposed to natural radiation existing in nature during normal times, and the natural radiation includes alpha rays, beta rays, and gamma rays emitted from radioactive isotopes present in the atmosphere, soil or rocks, etc. There is a cosmic ray that is irradiated to the human body along with it.

In addition, the human body is exposed to artificial radiation (radiation from all products such as electronic products such as medical radiation, TVs, fluorescent lamps, computers, machinery, and transportation means), in addition to the natural radiation.

Since such radiation has various effects on the human body, the International Atomic Energy Agency has set a recommended value of 3 mSv per year (unit of radiation exposure dose), and accordingly, in Korea, a radiation safety guide allowance is set to prevent exposure to more than 1 mSv per year. I'm doing it.

In particular, the radiation of alpha radiation by radon gas contained in the air, which accounts for 50% or more of the amount of radiation received by humans among the natural radiation described above, is specially managed. Although the radon concentration varies from country to country, ^{it is recommended to keep it below approximately 60-200 Bq/m 3} , and the Republic of Korea currently designates the radon concentration as 4 pCi/l (148 Bq/m ³ ) as a recommended indoor air quality standard.

Radon (Rn) is an inert gaseous element that emits strong radiation, and it refers to a substance produced through radium (Ra) in the radioactive decay chain of uranium and thorium. Radon is released from radium, a precursor contained in soils composed of granite, phosphorite, limestone, metamorphic rocks and soil, and the US Environmental Protection Agency warns that inhalation of radon is the second leading cause of lung cancer after smoking.

Meanwhile, radon gas, which is the main cause of radiation exposure to the general public, continuously moves to the ground through soil or gravel surrounding the building, which penetrates into the interior through the space of the building or the pores of concrete. Likewise, radon penetrating from the surrounding soil is a major cause of indoor radon, and construction materials such as concrete, gypsum board, gravel, and brick are also contaminants of indoor radon.

In addition, since radon is well soluble in water, it may be introduced into the room through the movement of groundwater, and the movement of the room through the water penetrates due to the capillary phenomenon or water pressure through the pores of the concrete, and the indoor temperature is high or the indoor pressure The lower this is, the more radon gas is introduced into the room.

In various construction materials such as cement and concrete, there is a potential risk of releasing not only radon, but also various harmful substances such as volatile organic substances, inorganic gases, and heavy metals on their own. The indoor environment can deteriorate. Due to this, despite the decrease in the smoking population, the lung cancer mortality rate is on the rise.

The configuration of a conventional PSD (Passive Sub-slab Depressurization) radon emission system is to forcibly exhaust radon accumulated in the soil under the building by installing an exhaust pipe under the slab of a building and installing an exhaust fan in the exhaust pipe. .

The exhaust fan allows a low-pressure space to be formed between the slab and the soil through forced exhaust so that radon from the soil is moved to the low-pressure space of the building floor through the gravel layer, and the moved radon gas is passed through an exhaust pipe connected to the roof of the building. It is exhausted to the outside.

However, the above-described ASD radon discharging device can be installed only in newly constructed buildings, so there is a limitation in technology application, and it is difficult to secure a space for inhaling radon by being buried in the soil. There is a problem that radon leaks or the soil collapses when vibration occurs due to the operation of the suction fan, which may damage the device.

In addition, there is a problem that foreign substances such as gravel or soil are introduced together with radon, which may cause failure of devices such as exhaust fans, and it is difficult to combine and separate, so that it cannot be moved to another place and reinstalled.

Therefore, there is a need to develop a realistic and easy-to-disseminate technology so that radon can be blocked smoothly without damaging the building due to radon reduction construction, aesthetic problems, and cost burdens.

(Patent Document 1) KR 10-2019-0102968 A

An object of the present invention is to provide a film having a radon shielding function and a method of manufacturing the same so that radon gas particles do not pass.

Another object of the present invention is to provide a film capable of maintaining a safe indoor environment from radon by including a silicone coating solution that can be adhered to a floor or wall used in the manufacture or construction of conventional building materials for a long time.

In order to achieve the above object, a method of manufacturing a film having a radon shielding function according to an embodiment of the present invention includes: 1) forming a metal layer on one surface of a base film; And 2) forming a contamination-resistant layer on one surface on which the metal layer is formed.

The base film is polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polypropylene (PP), polystyrene (PS), polyamide (PA), polycarbonate (PC), It is any one selected from the group consisting of polyacrylonitrile (PAN), polyimide (PI), polyvinyl alcohol (PVA), ethylene vinyl alcohol (EVOH), and polyvinylidene chloride (PVDC).

The metal layer is formed by thermal welding with a metal powder selected from the group consisting of aluminum (Al) powder, aluminum alloy powder, and mixtures thereof, and the average particle diameter of the metal powder is 8 μm to 18 μm.

The contamination resistant layer is fine powder shungite, fine powder illite, fine powder zeolite, fine powder elvan stone, fine powder bentonite, fine powder diatomaceous earth, fine powder germanium, fine powder loess, fine powder alum, fine powder jade. And an inorganic powder selected from the group consisting of a mixture thereof is applied.

After step 2), 3) corona discharge treatment on the other side of the base film on which the metal layer is formed, and applying a silicone coating solution; It includes.

The silicone coating solution contains 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 film having a radon shielding function according to an embodiment of the present invention is manufactured by the method of manufacturing the film having the radon shielding function.

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

The 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. Therefore, the formation of elements in the drawings has been exaggerated to emphasize a clearer description.

A method of manufacturing a film having a radon shielding function according to an embodiment of the present invention includes: 1) forming a metal layer on one surface of a base film; And 2) forming a contamination-resistant layer on one surface on which the metal layer is formed.

The step 1) is to form a metal layer on one side of the base film, and use an inorganic material having a dense particle structure to prevent the shape of radon radiation from radiating through the body.

In the step 2), an anti-pollution layer is formed on one surface where the metal layer is formed. It blocks gaseous radon such as radon gas generated by contamination of the structure while exhibiting an antibacterial effect against bacteria (S. mutans, etc.). will be.

The base film is polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polypropylene (PP), polystyrene (PS), polyamide (PA), polycarbonate (PC), Any one selected from the group consisting of polyacrylonitrile (PAN), polyimide (PI), polyvinyl alcohol (PVA), ethylene vinyl alcohol (EVOH), and polyvinylidene chloride (PVDC), the base film is a gas As a material having barrier properties and moisture barrier properties, it is defined as including all types of materials that can be used by those with ordinary knowledge in the field.

The polyethylene (PE) material is a heat-resistant material and is widely used in kitchen utensils, is easy to process, and is used in various product lines, and is also a main raw material for PET bottles. In addition, discoloration hardly occurs even when exposed to sunlight for a long time, and as a relatively safe material, it is widely used in children's toys.

In addition, polyethylene (PE, Polyethylene) materials can be divided into high density, low density, medium density, ultra high density, and ultra low density depending on the density. The low density polyethylene film layer (LDPE, Low Density Polyethylene) is manufactured by polymerizing ethylene. As a synthetic resin, it is a transparent solid (density of 0.91~0.94) at room temperature and has low crystallization, so it has excellent processability, flexibility, and transparency, so it is used as a raw material for agricultural and packaging transparent films, wire coverings, and various wraps.

Preferably, the base film of the present invention is made of polyvinyl alcohol (PVA) and ethylene vinyl alcohol (EVOH).

The metal layer is formed by thermal welding with a metal powder selected from the group consisting of aluminum (Al) powder, aluminum alloy powder, and mixtures thereof, and the average particle diameter of the metal powder is 8 μm to 18 μm.

In the case of aluminum (Al), its structure is dense and sturdy, thereby improving durability and improving impact resistance. In addition, it is possible to block the emission of radon radioactivity with the metal layer of the present invention due to high durability and high repulsion and resistance to external stimuli.

In particular, an aluminum alloy in which copper is added to aluminum (Al) can be rapidly cooled at a high temperature and left at a calm temperature to be prepared, and through this, it can have very strong strength (aging hardening).

In addition, the average particle diameter of the aluminum is 8 μm to 18 μm, and when the average particle diameter of the aluminum is less than 8 μm, it is difficult to treat the surface of the formed metal layer, and when it exceeds 18 μm, the aluminum is hardened and the radon rosewood ability is lowered. Can be.

The contamination resistant layer is fine powder shungite, fine powder illite, fine powder zeolite, fine powder elvan stone, fine powder bentonite, fine powder diatomaceous earth, fine powder germanium, fine powder loess, fine powder alum, fine powder jade. And an inorganic powder selected from the group consisting of a mixture thereof is applied.

It is preferably illite, but is not limited to the above example.

The fine powder referred to in the present invention refers to crushing by a ball mill, jet mill, or other pulverizing device, or manufactured to have the properties of a fine powder during the synthesis process, and the fine powder is defined as having an average particle diameter of 100 μm or less.

The šœgait in the present invention is calculated as a layer (up to 2 m thick) or a lenticular body among shales with low denaturation of small graphite microcrystals from the Jatulian era in Shunga near the northern part of the Karelia Ladoga in Russia. . It is black like pitch, dense, opaque, metallic luster. It is soft. Hardness 2.5. d 1.75~1.80, making graphite acid from concentrated nitric acid without melting in a fire zone.

Illite in the present invention has a chemical composition of (K,H ₃ O)Al ₂ (Si,Al) ₄ O ₁₀ (H ₂ O,OH) ₂ . In terms of chemical composition, some are close to muscovite mica, but relatively SiO ₂ , MgO, H ₂ O are high, and K ₂ O is low. It is a series of minerals such as hundreds of mica (水白雲母). Hardness 1 to 2, specific gravity 2.6 to 2.9. The cleavage is complete, and the streak color is white, and there is a earthy gloss. There is a view that it is not an independent mineral in terms of its chemical composition or crystal structure, but a mixed mineral containing other components. It is produced in aluminum-rich heterogeneous or tuff-like sedimentary rocks, and is produced as a metamorphic mineral of a hydrothermal mineral bedrock.

Zeolite in the present invention is also referred to as a tombstone. There are many types, but they have a lot in common, such as the point of having a lot of water content, the properties of crystals, and the acid phase. The hardness does not exceed 6, and the specific gravity is about 2.2. It is generally colorless, transparent or white translucent. When heated with a blowpipe, it boils and becomes bulging, so it got this name. Most types dissolve in hydrochloric acid and are often glued, but few types do not dissolve in hydrochloric acid. As the main types, there are Bangbistone, Fisheye Stone, Chabazite, Soda Stone, Heullandite, Steelbite, Lomontite, and Innessite. It is produced from voids or fissures of basic igneous rocks such as basalt or tuff, and sometimes exists as a secondary mineral among granite and gneiss. In addition, it may be produced in gold or other veins. In the crystal structure, the bonds of each atom are loose, and even if the moisture filling between them is released by high heat, the skeleton remains intact, so other particulate matter can be adsorbed. Using this property, it is used as an adsorbent, and it is used as a molecular sieve that separates fine particles of different sizes.

Elvan stone referred to in the present invention is known as a term used in Chinese herbal medicine, and belongs to granites when classified geologically. It is the same as quartz porphyry, feldspar porphyry, and granite porphyry, and the name of the rock coincides with quartz-monzonite. Quartz and feldspar are densely mixed. Yellowish white, light yellowish brown, light gray, dark green or light green rocks with red dots or white dots evenly mixed together are like rice balls made of barley, so the name Elvan Stone was given. The main components are silicic anhydride and aluminum oxide, and it contains a small amount of iron oxide. Known as the yellowish white elvan stone, it was previously used as an anti-inflammatory agent to treat skin diseases such as swelling or boils on the back and a filter to purify pills. According to Donguibogam, its nature is sweet, warm, and non-poisonous. It is composed of 30,000 to 150,000 holes per 1 cm ^3, so it has strong adsorption and contains about 25,000 kinds of inorganic salts. It is also used as a harmful metal removal agent because it exchanges ions with heavy metals, and it is known to emit far-infrared rays when heat is applied to this rock. Because of this characteristic, it is used in various industrial sectors such as jjimjilbang, tableware, and medical equipment.

Benzoite in the present invention contains quartz, feldspar, zeolite, and the like in many cases. The color is white, gray, light brown, light green, etc. It has pearl gloss, lead gloss, and is produced as a dense mass with a sense of fat, which is similar to the properties of montmorillonite, such as swelling by adsorbing water and having clear cation exchange properties. Tuff and vitreous rhyolite are deteriorated. Its use is very wide, and it is also used as the main component of Isu for petroleum refinery, as a binder for castings, as a mixture of raw materials for ceramics, and as a base for ointments. The name comes from the strata of Wyoming, the United States, where it was discovered.

Diatomaceous earth referred to in the present invention is mainly made of silicic acid (SiO2), and has a white or grayish white color. It is light and soft enough to smear powder when you touch it with your fingers. Because it is a fine porous material, it has strong absorbency and is a poor conductor of heat. Diatomaceous earth in our country is calculated as soil within the tertiary or fourth stratum. During the third period of the ancient period of our country, fault movements in the northeast to northeast directions occurred, and earth-zone sedimentary basins were formed in several places. The Yeongil Basin, the Earth Zone between Gilju and Myeongcheon, the Earth Zone between Seoul and Wonsan, and the Tuman River Basin were formed, and the third base was deposited there. When sedimentary layers were formed, diatoms were deposited in small shallow lakes or freshwater basins in various places to form deposits. Among these sedimentary basins, diatomaceous earth in Yeongil Bay is the largest in diatomite deposits, and is found intensively in Wolseong and Yeongil, Gyeongsangbuk-do. In addition, in North Korea, Haenghyeon-ri, Munsan-myeon, Anbyeon-gun, Anbyeon-gun, Namsan-ri, Anbyeon-myeon, Anbyeon-gun, Hamgyeongbuk-do, Hoemun mine, Bupyeong-dong, Junam-myeon, Gyeongseong-gun, Gyeongseong-gun, Hoemun mine, Ungpyeong-myeon, Gilju-gun, Sanbon mine, Myeongcheon-gun, Myeongcheon-gun Seomyeon, Baekrok mine, Gangwon-do The production centers of Sephori, Gosaph-myeon, Pyeonggang-gun are known. The development of diatomaceous earth as a deposit in Korea began in 1941 when it was incorporated as a designated legal mineral under the'Chosun Mining Ordinance'. Since then, domestic diatomite deposits have been discovered in various places, and in particular, diatomaceous earth produced in Iil-ri, Yangbuk-myeon, Wolseong-gun, Gyeongsangbuk-do, is said to have been used as a raw material for the manufacture of Asahi stoves in Japan at Nodong-ri, Gyeongju. In recent years, it is used as a refractory material, and because of its strong absorption, it is mostly used as a filter material for purification of industrial water, water, pharmaceuticals, and food. In addition, it is used as a filler for plastics and paper, adsorbent for dynamite, hemostatic agent, and a mixture of cement.

Germanium in the present invention has an element symbol Ge, an atomic number of 32, and an atomic weight of 72.59±3. Its existence was predicted by D. I. Mendeleev in 1871 and called Ekasil. However, it was discovered in Ag GeS by German chemist C. A. Binkler in 86 and named after the German Latin name ``Germania''. Since it is similar to silicon, it is widely present by substituting with silicon in the silicate in the crust. Also, it is contained in sulfide minerals or coal containing copper or zinc, but there are very few minerals based on germanium.

The alum stone referred to in the present invention is also referred to as alum stone. The chemical composition is KAl ₃ (SO ₄ ) ₂ (OH) ₆ . It appears as a hexagonal plate-like or impression-shaped crystal, and is usually a lump or granular shape. Hardness 3.5 to 4, specific gravity 2.6 to 2.9. Crystalline ones have a complete split on the bottom, and a pearly luster on the split side. The odd ones are not glossy. It is white, gray, and sometimes red, yellow, or reddish brown. Streak color is white. Insoluble in hydrochloric acid, soluble in potassium hydroxide or hot sulfuric acid. It is produced in volcanic rock areas that have undergone hydrothermal alteration.

The term jade in the present invention refers to dense, hard, transparent, beautifully shiny, polished and glossy. Mineralogically, purgatory is a type of amphibole, and jadeite is a type of alkali pyrite. Purgatory is often milky white, and there are also green, yellow, and red, and jadeite is green and white. There are various names depending on the color, but white jade and jade are typical. It has been cherished in the East since ancient times, and has been handcrafted and used as decorative stone and jadeite. Purgatory is produced as veins in crystalline schist or gneiss in Turkey and elsewhere, and in the contact zone of granite in northeast China. Jadeite is produced by forming veins in serpentine in Myanmar, and is also produced in Yunnan, China and Tibetan Highlands. Although jade in the narrow sense refers to jade, the present invention is not limited thereto, and jade in the present invention is defined as including all of the jade in the broad sense described above.

Preferably, the inorganic powder may be heat-treated by mixing with a solution containing any one selected from the group consisting of strontium ions (Sr2+), calcium ions (Ca2+), and magnesium ions (Mg2+), and mixtures thereof.

When the inorganic powder is mixed with the solution containing the ions and subjected to heat treatment, the inorganic powder itself may have excellent antibacterial, that is, stain resistance, against bacteria (S. mutans, etc.).

More preferably, the inorganic powder may be heat-treated by mixing with a solution containing strontium ions (Sr2+) and calcium ions (Ca2+). In the case of the above range, the fouling resistance of the inorganic powder itself increases.

More preferably, the inorganic powder includes fine powder zeolite, and 20 to 60 parts by weight of fine powder shungite, 20 to 60 parts by weight of fine powder illite, based on 100 parts by weight of the zeolite. 20 to 60 parts by weight, fine powder bentonite 20 to 60 parts by weight, fine powder diatomaceous earth 50 to 100 parts by weight, fine powder germanium 10 to 20 parts by weight, fine powder ocher 10 to 20 parts by weight, fine powder alum stone 10 to 20 parts by weight and fine powder jade ( 10 to 20 parts by weight of jade) may be included, and may be heat treated by mixing with a solution containing strontium ions (Sr2+) and calcium ions (Ca2+).

In the case of the above range, antibacterial and fouling resistance can be greatly increased more than a simple combination due to the interaction of the powders constituting the inorganic powder, and when applied and used, it can have fouling resistance.

The film having a radon shielding function of the present invention includes the steps of 2) after the step, 3) corona discharge treatment on the other side of the base film on which the metal layer is formed, and applying a silicone coating solution; It includes.

The step 3) is to apply a silicone coating solution to the other side of the base film on which the metal layer is formed in step 2), that is, the side where the metal layer is not formed on the base film. Is not to do it.

The silicone coating solution contains 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 alkenylpolysiloxane, hydrogen polysiloxane, and mixtures thereof, preferably alkenylpolysiloxane, but is not limited to the above examples.

The catalyst is a platinum catalyst, but it is not limited to examples, and all 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 parts by weight of silicone surfactant, 1 to 5 parts by weight of silane coupling agent, and 0.01 to 0.05 parts by weight of catalyst, based on 100 parts by weight of polysiloxane. .

When the silicone coating solution is coated and used within the above range, an adhesive layer with minimal peel force and silicon transfer amount can be formed.

More preferably, the film having a radon shielding function of the present invention comprises the steps of: after step 3), forming an adhesive layer on the surface to which the silicone coating solution is applied; It may further include.

When an adhesive layer is further formed on the surface to which the silicone coating solution of step 3) is applied, when it is bonded by pressing it, the bonding strength between the silicone coating solution and the adhesive layer increases, so that it is possible to prevent a lifting phenomenon during bonding, and even when bonding for a long time. It is to have excellent adhesion.

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

[Formula 2]

here,

n is an integer from 1 to 10.

The epoxy compound further includes a nobonane group in addition to the epoxy group, so that heat resistance is excellent and adhesiveness can be improved.

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 it.

It is used as an adhesive layer of a film having a radon shielding function, but in consideration of the fact that the film having a radon shielding function of the present invention is adhered to a floor or wall used for manufacturing or construction of a building material, the required heat resistance, incombustibility, In order to improve adhesion, a phenolic 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 supporting film formation to maintain the adhesive composition in a solid state at room temperature, and specifically, novolac-type phenoxy resin, naphthalene-type phenoxy resin, biphenyl-type phenoxy resin, etc. I can. These may be used individually or may be used in combination of a plurality. It is preferable that the weight average molecular weight of the phenoxy resin is 30,000 to 70,000. These phenoxy resins are used to maintain the adhesive composition in a solid state at room temperature. In addition, in order to prevent unexpected hardening from occurring due to the reaction, the phenoxy resin is more preferably an unmodified one.

Specifically, the inorganic filler may be silica, alumina, talc, mica, sericite, magnesium hydroxide, or the like, 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 comprises an epoxy compound represented by the following Formula 1, and 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. Includes. In the case of the above range, excellent heat resistance, incombustibility, and adhesion may be exhibited.

The film having a radon shielding function according to an embodiment of the present invention is manufactured by the method of manufacturing the film having the radon shielding function.

The film having a radon shielding function of the present invention and a method of manufacturing the same can improve radon gas particle barrier performance by thermally fusion bonding fine particles of metal powder to a material exhibiting conventional gas barrier properties and moisture barrier properties.

In addition, by applying a silicone coating solution to the other side of the surface on which the metal powder is thermally fused, it is possible to adhere for a long time to the floor or wall used in the manufacture or construction of conventional building materials, thereby maintaining a safe indoor environment from radon.

1 is a photograph showing a process of forming a metal layer by a method of manufacturing a film having a radon shielding function according to an embodiment of the present invention.
2 is a process for confirming the radon shielding effect of a film having a radon shielding function according to an embodiment of the present invention.
3 is a process of measuring indoor air quality by attaching a film having a radon shielding function according to an embodiment of the present invention to a wall of a building.
4 is a photograph of a prototype film having a radon shielding function according to an embodiment of the present invention.

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

[Production Example 1: Preparation of mixed inorganic powder dispersion]

Based on 100 parts by weight of zeolite, 45 parts by weight of fine powder, 45 parts by weight of fine powder illite, 45 parts by weight of fine elvan stone, 45 parts by weight of fine powder bentonite, 80 parts by weight of fine powder diatomaceous earth, 15 parts by weight of fine powder germanium, 15 parts by weight of fine powder loess Inorganic powder containing 15 parts by weight of parts, fine powder alum stone and 15 parts by weight of fine powder jade was prepared.

Thereafter, the inorganic powder was mixed with a solution containing strontium ions (Sr2+) and calcium ions (Ca2+), heat-treated for 1 hour, and then purified water was mixed.

[Production Example 2: Preparation of silicone coating liquid]

With respect to 100 parts by weight of alkenylpolysiloxane, 10 parts by weight of a silicone oil represented by the following formula (1), 1 part by weight of a silicone surfactant, 1 part by weight of a silane coupling agent, and 0.01 part 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.

[Production Example 3: Preparation of adhesive composition]

An epoxy compound represented by the following formula (2); 4,4'-diaminodiphenyl sulfone; A triazine structure-containing phenol novolac 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 noblock 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 is 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 weight part)

[Production Example 4: Preparation of a film having a radon shielding function]

In order to confirm the effect of the film having a radon shielding function of the present invention, each step was configured in the same manner as in Table 2 below to prepare a film (RS1 to RS10) having a radon shielding function.

Specifically, aluminum powder having an average particle diameter of 5 μm on one surface of a polyvinyl alcohol (PVA) base film was thermally fused at 140° C. for 2 minutes to form a metal layer. Thereafter, the inorganic powder dispersion of Preparation Example 1 was applied to one surface on which the metal layer was formed to form a fouling-resistant layer (RS1).

Preparation of RS2 film

The aluminum powder was prepared in the same manner as RS1, except that an average diameter of 8 μm was used.

Preparation of RS3 film

It was prepared in the same manner as RS1, except that the aluminum powder was used with an average diameter of 18 μm.

Preparation of RS4 film

The aluminum powder was prepared in the same manner as RS1, except that the average diameter was 20 μm.

Preparation of RS5 film

Aluminum powder having an average particle diameter of 8 μm on one surface of a polyvinyl alcohol (PVA) base film was thermally fused at 140° C. for 2 minutes to form a metal layer. Thereafter, the inorganic powder dispersion of Preparation Example 1 was applied on one surface of the metal layer to form a contamination-resistant layer, and corona discharge treatment was performed on the other surface of the base film on which the metal layer was formed, and the silicone coating solution prepared in Preparation Example 2 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 3 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 RS6 film

RS6 film was prepared in the same manner as RS5, except that ADC2 was used instead of ADC1.

Preparation of RS7 film

RS7 film was prepared in the same manner as RS5, except that ADC3 was used instead of ADC1.

Preparation of RS8 film

An RS8 film was prepared in the same manner as RS5, except that ADC4 was used instead of ADC1.

Preparation of RS9 film

RS9 film was prepared in the same manner as RS5, except that ADC5 was used instead of ADC1.

Preparation of RS10 film

An RS10 film was prepared in the same manner as RS7, except that a silicone coating layer was not formed.

RS1 RS2 RS3 RS4 RS5 RS6 RS7 RS8 RS9 RS10 S1 O O O O O O O O O O S2 O(5μm Al) O
(8μm Al) O
(18μm Al) O
(20μm Al) O
(8μm Al) O
(8μm Al) O
(8μm Al) O
(8μm Al) O
(8μm Al) O
(8μm Al) S3 O O O O O O O O O O S4 - - - - O O O O O - S5 - - - - O(ADC1) O (ADC2) O
(ADC3) O
(ADC4) O
(ADC5) O
(ADC3)

[Experimental Example 1: Radon shielding effect]

In order to check the radon shielding effect of the films (RS1 to RS10) having a radon shielding function according to the present invention, the barrier material performance was measured with a radon reduction efficiency evaluation device (EHS Research Institute) according to ISO/DIS 11665-10 standard. It was evaluated by proceeding together.

The results are shown in Table 3 below.

RS1 RS2 RS3 RS4 RS5 RS6 RS7 RS8 RS9 RS10 Radon reduction efficiency 30 97 80 55 98 98 99 99 98 97

(unit: %)

According to Table 3, in the case of RS1 and RS4 including a metal layer heat-sealed using aluminum (Al) having an average particle diameter of 5 μm and 20 μm, heat-sealed using aluminum (Al) having an average particle diameter of 8 μm and 18 μm. Compared to RS2 to RS3 and RS5 to RS 10 including the metal layer, it was confirmed that the radon reduction efficiency was significantly reduced.

It was confirmed that the radon shielding effect was excellent when the metal layer was heat-sealed using aluminum (Al) having an average particle diameter of 8 μm and 18 μm.

[Experimental Example 2: Evaluation of adhesiveness]

In order to confirm the evaluation of the adhesion of the film having a radon shielding function according to the present invention, an evaluation was conducted on whether or not a lifting phenomenon occurred after attaching the film.

When the film is attached, it is a part that is directly connected to the heat resistance of the film and the heat resistance of the adhesive layer and can be easily checked with the naked eye, and the film with the lifting phenomenon cannot be used as a defective product.

In order to conduct an objective evaluation, 20 films having a radon shielding function of RS1 to RS10 were attached to the wall used for construction, and it was checked whether a lifting phenomenon occurred, and the number of films in which the lifting phenomenon occurred was 1 If there are fewer than one, it is expressed as X, if it is 1 to 5, it is expressed as △, and if it is more than five, it is expressed as O.

RS1 RS2 RS3 RS4 RS5 RS6 RS7 RS8 RS9 RS10 Occurrence of lifting O △ O △ △ △ X X △ O

According to Table 4, RS7 to RS8 including the adhesive layer by the adhesive composition of ADC3 to ADC4 did not have one lifting phenomenon when the film was attached, but RS1 and RS3 did not include an adhesive layer or coated with a silicone coating solution. And it was confirmed that the lifting phenomenon occurs in more than 5 RS10.

In the case of RS5 to RS9 including the adhesive layer by the adhesive composition of ADC1 to ADC3, there was a lifting phenomenon of 5 or less, but when considering production efficiency, it will be said that RS5 to RS6 exhibits a high defect rate with a defect rate of up to 25%. .

In addition, when comparing the case of RS7 and RS10 containing the same adhesive composition ADC3, compared to RS7 forming the silicone coating solution, in the case of RS10 not forming the silicone coating solution of the present invention, more than 5 lifting phenomenon occurs. Confirmed.

It was confirmed that the bonding strength between the silicone coating solution and the adhesive layer of the present invention is increased, so that the lifting phenomenon can be prevented during adhesion, and the adhesion is excellent even during adhesion.

[Experimental Example 3: Heat resistance evaluation]

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

If swelling occurred, it was marked as O, and if it did not occur, it was marked as X.

RS1 RS2 RS3 RS4 RS5 RS6 RS7 RS8 RS9 RS10 Occurrence of swelling O O O O X X X X X O

As shown in Table 5, in RS5 to RS9, swelling did not occur as a result of the heat resistance test. In other experimental results, it was confirmed visually that swelling occurred.

Through the above experiment, it means that the heat resistance of the film having a radon shielding function of the present invention is comprehensively affected by the formation of the silicone release layer and the configuration of the adhesive layer.

[Experimental Example 4: Performance evaluation of a film having a radon shielding function]

The films RS7 and RS8 having a radon shielding function of the present invention, which confirmed excellent effects through Experimental Examples 1 to 3, were attached to a building wall as shown in FIG. 3 to evaluate indoor air quality.

Air quality performance indicators include permeability (%), barrier properties (Bq/m ³ ), formaldehyde (mg/m·h), toluene (mg/m·h), TVOC (mg/m·h) and radon reduction efficiency ( %), and using Hyundai L&C's'Hyundai Window Film (a functional product with improved sun-shielding function and heat-blocking performance)' of Hyundai L&C (sputtering technology and nano ceramic inorganic compound coating method as a source), as shown in Table 6 below. As shown in the index, for comparison, the effect of the'Hyundai Window Film' product was set as an index of 5 and compared. In the case of radon, ES 02901.1c continuous measurement of radon in indoor air was used.

The results are shown in Table 6 below.

control RS7 RS8 Performance evaluation 5 8 9

(Unit: index)

As shown in Table 6, the films RS7 and RS8 having a radon shielding function of the present invention, which 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 a building wall. It was confirmed to be affected.

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 by those skilled in the art using the basic concept of the present invention defined in the following claims are also present. It belongs to the scope of rights of

Claims (7)

1) forming a metal layer on one side of the base film; And
2) forming an anti-pollution layer on one surface of the metal layer; Including,
After step 2) above,
3) corona discharge treatment on the other side of the base film on which the metal layer is formed, and applying a silicone coating solution,
The silicone coating solution contains polysiloxane, a silicone oil represented by the following formula (1), a silicone surfactant, a silane coupling agent, and a catalyst.
Method for producing a film having a radon shielding function:
[Formula 1]

here,
p and q are integers from 1 to 100,
s is an integer from 1 to 10. The method of claim 1,
The base film is polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polypropylene (PP), polystyrene (PS), polyamide (PA), polycarbonate (PC), Any one selected from the group consisting of polyacrylonitrile (PAN), polyimide (PI), polyvinyl alcohol (PVA), ethylene vinyl alcohol (EVOH), and polyvinylidene chloride (PVDC)
A method of manufacturing a film having a radon shielding function. The method of claim 1,
The metal layer is formed by thermal welding with a metal powder selected from the group consisting of aluminum (Al) powder, aluminum alloy powder, and mixtures thereof,
The average particle diameter of the metal powder is 8μm to 18μm
Method for producing a film having a radon shielding function. The method of claim 1,
The contamination resistant layer is fine powder shungite, fine powder illite, fine powder zeolite, fine powder elvan stone, fine powder bentonite, fine powder diatomaceous earth, fine powder germanium, fine powder loess, fine powder alum, fine powder jade, and Inorganic powder selected from the group consisting of a mixture thereof is applied
Method for producing a film having a radon shielding function. delete delete Manufactured by the manufacturing method according to claim 1.
Film with radon shielding function.

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