KR102216859B1 - Waterproof sheet with excellent radon blocking effect - Google Patents

Abstract

The present invention is a release film; A coating material layer laminated on the release film; And a transparent film layer laminated on the coating material layer. Including, the coating material layer, 64 to 110 parts by weight of asphalt, 0.92 to 3.8 parts by weight of styrene butadiene styrene rubber, 30 to 50 parts by weight of photosensitive resin, thickening stabilizer based on 100 parts by weight of aluminum powder obtained by drying aluminum hydroxide 2.4 to 5 parts by weight, 1.6 to 2 parts by weight of curing accelerator, 0.3 to 0.44 parts by weight of polypropylene fiber, 0.24 to 0.36 parts by weight of silica metal, 3 to 4.6 parts by weight of dolomite, 70 to 90 parts by weight of calcium carbonate and 70 to 120 parts by weight of filler It relates to a waterproof sheet having excellent radon blocking effect including parts by weight.

Description

Waterproof sheet with excellent radon blocking effect

The present invention relates to a waterproof sheet having excellent radon blocking effect.

Recently, in order to improve the urban ecosystem and urban environment, there are a lot of projects to create rooftop greening or indoor gardens of buildings.This means that rooftop greening and indoor gardening are the restoration of soil ecosystem, energy saving for heating and cooling, mitigation of urban heat islands, urban This is because it has various advantages in environmental and economic aspects, such as flood prevention, air purification, water purification, noise reduction, urban landscape improvement, and durability improvement of buildings.

However, one of the reasons why roof greening is not activated despite the many advantages of roof greening is that a problem occurs in waterproofing of buildings due to damage to the waterproofing layer as the roots of plants penetrate into the floor. In other words, it is a big problem that the roots of plants planted on the roof or indoors penetrate the waterproof sheet and damage to the waterproof layer under the waterproof sheet, causing a problem in waterproofing.

In order to solve the above problems, a lot of research and development are being conducted, and waterproofing as in Patent Document 1, "Complex waterproofing using a waterproof sheet and a waterproof sheet, construction method of a complex waterproof structure" (Registration Patent No. 10-0872127) And a composite sheet for waterproofing was invented, but over time, a phenomenon of lifting or peeling occurred in a gap formed in the overlapping part of the sheet or at the junction of the waterproof sheet, and the plant roots penetrated through such gaps or junctions, and the waterproofing and waterproofing layer was still damaged. There is a problem that becomes.

On the other hand, radon is a natural radioactive substance, which is a colorless, odorless, and tasteless gas that exists everywhere on Earth. The World Health Organization (WHO) estimates that 3-14% of lung cancer incidences in the world are caused by radon, and it is defined as a major cause of lung cancer.

An object of the present invention is to provide a waterproof sheet having excellent radon blocking effect by laminating a waterproof coating material and a transparent film.

Meanwhile, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned are clearly to those of ordinary skill in the technical field to which the present invention belongs from the following It will be understandable.

The waterproof sheet having excellent radon blocking effect according to the present invention includes a release film; A coating material layer laminated on the release film; And a transparent film layer laminated on the coating material layer. Including, the coating material layer, 64 to 110 parts by weight of asphalt, 0.92 to 3.8 parts by weight of styrene butadiene styrene rubber, 30 to 50 parts by weight of photosensitive resin, thickening stabilizer based on 100 parts by weight of aluminum powder obtained by drying aluminum hydroxide 2.4 to 5 parts by weight, 1.6 to 2 parts by weight of curing accelerator, 0.3 to 0.44 parts by weight of polypropylene fiber, 0.24 to 0.36 parts by weight of silica metal, 3 to 4.6 parts by weight of dolomite, 70 to 90 parts by weight of calcium carbonate and 70 to 120 parts by weight of filler Includes parts by weight.

The transparent film layer is a polyester resin including polyethylene terephthalate (PET), polyethylene naphthalate (PEN) and polybutylene terephthalate (PBT), polyolefin including polypropylene (PP) and polystyrene (PS) Resin, polyamide (PA) including nylon-6 and nylon-66, polycarbonate (PC), polyacrylonitrile (PAN), polyimide (PI), coated polyethylene terephthalate (PVA-PET, PVDC) -PET, EVOH-PET), ethylene vinyl alcohol (EVOH), and a transparent film containing at least one of polyvinylidene chloride (PVDC); It may include.

The coating material layer is laminated on the release film, the adhesive layer containing copper powder, the core material layer laminated on the adhesive layer, the core material layer, and asphalt with respect to 100 parts by weight of aluminum powder obtained by drying aluminum hydroxide 64 to 110 parts by weight, 0.92 to 3.8 parts by weight of styrene butadiene styrene rubber, 30 to 50 parts by weight of photosensitive resin, 2.4 to 5 parts by weight of thickening stabilizer, 1.6 to 2 parts by weight of curing accelerator, 0.3 to 0.44 parts by weight of polypropylene fiber, It may include a waterproof layer including 0.24 to 0.36 parts by weight of silica metal, 3 to 4.6 parts by weight of dolomite, 70 to 90 parts by weight of calcium carbonate, and 70 to 120 parts by weight of a filler, and a strength reinforcing layer laminated on the waterproof layer.

The waterproof layer may further include 10 to 60 parts by weight of an adsorbent based on 100 parts by weight of the aluminum powder.

The adsorbent may be characterized in that at least one selected from activated carbon and zeolite.

The adhesive layer is made of an adhesive composition comprising a process oil, a modifier, an adhesion reinforcing agent, a heat resistance reinforcing agent, a compatibilizer, and copper powder, and the modifier is SBS (Styrene-Butadiene-Styrene), SIS (Styrene-Isoprene- Styrene), SB (Styrene Butadiene), SBR (Styrene-Butadiene Rubber), SEBS (Styrene ethylene butadiene styrene), and EVA (Ethylene vinyl acetate) may be at least one selected from the group consisting of.

The core material layer is at least one selected from the group consisting of polyethylene (PE) woven fabric, polypropylene (PP) woven fabric, polypropylene (PP) nonwoven fabric, high density polyethylene (HDPE) woven fabric, high density polyethylene (HDPE) nonwoven fabric, and polyester nonwoven fabric. Can be

According to an embodiment of the present invention, it is possible to simultaneously implement radon shielding and waterproofing functions by coating the surface of a structure to prevent the emission of pollutants, and by improving the environment of domestic houses that exceed the radon standard The quality of life can be improved by reducing the incidence of lung cancer.

On the other hand, the effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art from the following description. I will be able to.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. 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 embodiment is provided to more completely describe the present invention to those with average knowledge in the art. Therefore, the shape of the element in the drawings has been exaggerated to emphasize a clearer description.

The configuration of the invention for clarifying the solution to the problem to be solved by the present invention will be described in detail with reference to the accompanying drawings based on a preferred embodiment of the present invention, but the same in assigning reference numerals to the components of the drawings For the components, even if they are on different drawings, the same reference numerals are given, and it should be noted in advance that components of other drawings may be referred to when necessary when describing the drawings.

The waterproof sheet having excellent radon blocking effect according to an embodiment of the present invention includes a coating material layer laminated on the release film; And a transparent film layer laminated on the coating material layer. Including, the coating material layer, 64 to 110 parts by weight of asphalt, 0.92 to 3.8 parts by weight of styrene butadiene styrene rubber, 30 to 50 parts by weight of photosensitive resin, thickening stabilizer based on 100 parts by weight of aluminum powder obtained by drying aluminum hydroxide 2.4 to 5 parts by weight, 1.6 to 2 parts by weight of curing accelerator, 0.3 to 0.44 parts by weight of polypropylene fiber, 0.24 to 0.36 parts by weight of silica metal, 3 to 4.6 parts by weight of dolomite, 70 to 90 parts by weight of calcium carbonate and 70 to 120 parts by weight of filler It may include parts by weight.

In addition, the coating material layer is laminated on the release film, the adhesive layer containing copper powder; A center material layer laminated on the adhesive layer; A waterproof layer laminated on the center material layer; A strength reinforcing layer laminated on the waterproof layer; Includes.

The release film protects the adhesive layer, and various release films such as polypropylene (PE) film, silicone film, EPDM ethylene propylene diene monomer (M-class) film, etc. can be used.

The adhesive layer is laminated on the top of the release film, functions as a waterproof layer, and at the same time contains copper powder, so that the anti-rust effect can be exhibited. After the release film is removed, it can be attached to the test site. The adhesive layer may be made of an adhesive composition comprising a process oil, a modifier, an adhesive strength reinforcing agent, a heat resistance reinforcing agent, a compatibilizer, and copper powder.

Petroleum-based, coal-based, and vegetable-based oils can be used as the process oil, and aromatic, naphthenic, and paraffinic can be used as petroleum-based and coal-based oils. As vegetable oils, linseed oil, soybean oil, linseed oil, Rice bran oil can be used, and one or two or more selected from the process oils specified above can be used.

It is preferable that the process oil is contained in an amount of 40 to 60% by weight based on 100% by weight of the total adhesive composition. If the process oil is less than 40% by weight, the viscosity of the waterproof layer becomes too high, making workability uncomfortable and poor fluidity, and if it exceeds 60% by weight, the viscosity decreases and the effects of other ingredients are reduced, making it impossible to secure enough physical properties of the product and heat-resistant flow This is because stability and adhesion are also weak, making it difficult to use as a waterproofing material.

The modifier may be rubber, a thermoplastic elastomer, or a mixture thereof, and specifically, SBS (Styrene-Butadiene-Styrene), SIS (Styrene-isoprene-Styrene), SB (Styrene Butadiene), SBR (Styrene-Butadiene Rubber), SEBS (Styrene ethylene butadiene styrene), EVA (Ethylene vinyl acetate), APP, etc. can be used alone or in combination of two or more.

It is preferable that the modifier is included in 5 to 15% by weight based on the total 100% by weight of the adhesive composition. If the content of the modifier is less than 5% by weight, elasticity, durability, and fluid resistance cannot be sufficiently exhibited, and if it exceeds 15% by weight, the overall viscosity of the waterproof layer increases, causing inconvenience in workability, resulting in an increase in unit cost. As a result, product competitiveness is deteriorated.

Adhesion reinforcing agent is to increase the tensile strength and film strength while reinforcing the adhesive strength of the adhesive layer. Petroleum resin (C5, C9, C5-C9 copolymerization, hydrogenated), natural resin (rosin ester), coumarone resin, polybutene One or two or more selected from among them may be used. It is preferable that the adhesion reinforcing agent is included in 20 to 40% by weight based on 100% by weight of the total adhesive composition. If it is less than 20% by weight, the adhesive strength with the adherend and the center material layer may decrease, which may cause waterproof construction defects.If it exceeds 40% by weight, the strength is high and the physical properties become hard at high temperatures and the elasticity decreases, causing the adhesive layer to break. There are problems such as cracking and the like.

The heat resistance reinforcing agent is for improving the heat resistance of the adhesive layer, and may be used alone or in combination of two or more of paraffin wax, amide wax, polypropylene wax, polyethylene wax, oxide wax, and natural wax. It is preferable that the heat resistance reinforcing agent is included in 5 to 10% by weight based on 100% by weight of the total adhesive composition. If it is less than 5% by weight, the function as a heat-resistant reinforcing agent cannot be exhibited, and if it exceeds 10% by weight, a film is formed on the product surface, resulting in deterioration of adhesion and adhesion performance with the adherend.

The compatibilizer serves to improve the strength of the adhesive layer by making the material bond in the adhesive layer smooth. As the compatibilizer, a known compatibilizer such as an acid-based material may be used, and it is preferable that 0.1 to 3% by weight is included with respect to 100% by weight of the total adhesive composition. If it is less than 0.1% by weight, the performance as a crosslinking role between substances cannot be exhibited, and if it is more than 3% by weight, the cost increases.

Copper powder can control the growth of the root meristematic tissue and can impart a rooting effect to the adhesive layer. Although the copper layer may be laminated as an independent layer for the anti-fogging effect, it is preferable to add it in the form of copper powder as in the present invention. In other words, if the copper layer is laminated on the outside, it may be damaged or corroded, or may be detached (peeled) from the composite sheet, and in this case, the composite sheet will not be able to exhibit the anti-rust effect at all. Therefore, it is recommended to add copper powder to the inside of the adhesive layer. It is preferable from the viewpoint of exerting a rooting effect. It is preferable that the copper powder is contained in an amount of 1 to 3% by weight based on 100% by weight of the total adhesive composition. If it is less than 1% by weight, it is difficult to achieve the anti-rust effect, and if it is more than 3% by weight, there is a concern that the composition ratio of the entire adhesive composition is changed and the dispersibility of the adhesive composition is deteriorated, thereby deteriorating the mechanical properties of the adhesive layer.

The core material layer is laminated on the top of the adhesive layer, and is to increase the durability of the composite sheet and the binding power of the material.Polyethylene (PE) woven fabric, polypropylene (PP) woven fabric, polypropylene (PP) non-woven fabric, high-density polyethylene (HDPE) woven fabric , At least one selected from the group consisting of high-density polyethylene (HDPE) nonwoven fabric and polyester nonwoven fabric may be used.

Here, the waterproof layer is laminated on the core material layer, and based on 100 parts by weight of aluminum powder obtained by drying aluminum hydroxide, 64 to 110 parts by weight of asphalt, 0.92 to 3.8 parts by weight of styrene butadiene styrene rubber, 30 to 50 parts by weight of photosensitive resin, viscosity stability 2.4 to 5 parts by weight of an agent, 1.6 to 2 parts by weight of a hardening accelerator, 0.3 to 0.44 parts by weight of polypropylene fiber, 0.24 to 0.36 parts by weight of silica metal, 3 to 4.6 parts by weight of dolomite, 70 to 90 parts by weight of calcium carbonate, and 70 to a filler It may contain 120 parts by weight.

In addition, the waterproof layer may further include 10 to 60 parts by weight of an adsorbent based on 100 parts by weight of the aluminum powder.

The adsorbent may be included in one or more selected from talc, calcium carbonate, penzil, and fumed silica.

In addition, the waterproof layer is laminated on the top of the core material layer and can be manufactured by mixing SBS (Styrene-Butadiene-Styrene) compound and copper powder, and is intended to improve the elasticity of the sheet and improve the efficiency of water permeability. Used. The SBS compound may be a linear type SBS (Linear Type SBS) or a radial type SBS (Radial Type SBS). Copper powder can be used to exert anti-rust effect, as in the above-described adhesive layer.

The strength reinforcing layer is used for reinforcing strength by being laminated on the waterproof layer, and an aluminum layer may be used. Specifically, the strength reinforcing layer prevents fracture of the composite sheet and increases the tensile strength and resistance of the composite sheet. In addition, it is possible to prevent a change in the shrinkage rate of the composite sheet due to temperature changes such as seasonal changes.

에서 급랭시켜 평온에 방치하여 제조할 수 있고, 이를 통해 매우 강한 강도(시효경화)를 가질 수 있다. 이때, 구리는 알루미늄합금 전체 100 중량%에 대해서 1~5 중량% 포함되는 것이 바람직하다. 구리가 1 중량% 미만이면, 방근 효과를 달성하기 힘들고, 5 중량%를 초과하면 내식성이 저하되고, 연신율이 낮아져 생산성이 떨어질 수 있다.In one embodiment, the strength reinforcing layer may be an aluminum alloy layer prepared by adding copper to aluminum. If an aluminum alloy layer containing copper is used as the strength reinforcing layer, a layer containing copper can be constructed in three steps (strength reinforcing layer, waterproof layer, and adhesive layer), and excellent anti-dust effect by copper can be achieved. By increasing the strength of aluminum, it can also have the effect of protecting the composite sheet. Aluminum alloy with copper added to aluminum is high temperature (500~510

It can be rapidly cooled in and left to stand at calm, and through this, it can have very strong strength (aging hardening). At this time, it is preferable that copper is included in an amount of 1 to 5% by weight based on 100% by weight of the total aluminum alloy. When the content of copper is less than 1% by weight, it is difficult to achieve the anti-rust effect, and when it exceeds 5% by weight, corrosion resistance decreases, elongation decreases, and productivity may decrease.

In addition, a small amount of magnesium may be added to the aluminum alloy in order to change some properties depending on the construction location of the composite sheet. That is, if 0.5 to 2.5% by weight of magnesium is further included with respect to 100% by weight of the total aluminum alloy, an aluminum alloy having further improved strength can be manufactured.

The transparent film layer is laminated on top of the strength reinforcing layer, and includes polyethylene terephthalate (PET), polyethylene (PE), high density polyethylene (HDPE), linear low density polyethylene (LLDPE), ethylene vinyl acetate (EVA), and polyvinyl chloride (PVC). ) And at least one selected from the group consisting of an olefin-based thermoplastic elastomer (TPO).

Next, a method of manufacturing a waterproof sheet having excellent radon blocking effect will be described. In describing this, for convenience of explanation, a waterproof sheet having excellent radon blocking effect is described as an example, but is not limited thereto. In addition, descriptions of the overlapping parts will be omitted.

2 is a flow chart schematically showing a method of manufacturing a waterproof sheet having excellent radon blocking effect according to an embodiment of the present invention. Referring to FIG. 2, a method of manufacturing a waterproof sheet having excellent radon blocking effect according to an embodiment of the present invention includes: a first step of laminating an adhesive layer including copper powder on a release film; A second step of laminating a center material layer on the adhesive layer; A third step of laminating a waterproof layer including copper powder on the core material layer; A fourth step of laminating a strength reinforcing layer on the waterproof layer; And a fifth step of laminating a transparent film layer on the strength reinforcing layer. This

The invention not only can effectively block penetration by water (rainwater, groundwater, etc.), but also has a waterproof layer containing copper powder and an adhesive layer to prevent the roots of plants planted from being settled during artificial reforestation, resulting in damage to the structure. It has an effect that can prevent the phenomenon of becoming.

사이의 프로세스 오일에 개질재를 투입하여 용해(제1-1단계)시키고, 다음으로 접착력 보강제, 내열성 보강제 및 구리 분말을 투입하여 용해 및 분산(제1-2단계)한 후, 상용화제를 투입하여 용해 및 분산(제1-3단계)시킨다. 제조된 분산물은 이형필름에 코팅하여 점착층을 형성(제1-4단계)한다.The first step is to form an adhesive layer containing copper powder on the release film, and the adhesive layer is the first step of dissolving a modifier in the process oil, an adhesion reinforcing agent in the process oil in which the modifier is dissolved, heat resistance. Step 1-2 of preparing a dispersion by dissolving and dispersing by adding a reinforcing agent and copper powder, step 1-3 of dissolving and dispersing by adding a compatibilizer to the dispersion, and a dispersion in which the compatibilizer is dispersed is a release film It may include a 1-4 step of coating on. Specifically, 140-200

A modifier is added to the inter-process oil to dissolve (Step 1-1), and then an adhesion enhancer, heat resistance enhancer, and copper powder are added to dissolve and disperse (Step 1-2), and then a compatibilizer is added. To dissolve and disperse (step 1-3). The prepared dispersion is coated on a release film to form an adhesive layer (steps 1-4).

At this time, steps 1-4 of coating the dispersion on the release film may be performed by at least one of a slot spray method, a spray method, a roller coating method, and a curtain-flow coating method.

The slot injection method uses special mechanical equipment consisting of a gear pump, hot melt hose, slot head, slot nozzle, supply and control system. In this method, a gear pump is used to move the compound to a hot melt hose, and then the compound collected in the slot head is adjusted by a power supply and control system, and then sprayed and applied by a slot nozzle.

The supply and control system can adjust setting values and parameters to optimize the coverage and quality of the object, and at this time, the distance between the slot nozzle and the release film is 100 μm or less, and the coating is coated in contact with the coated surface. The slot spraying method enables uniform coating and does not cause any loss during spraying.

The spray method is one of the most widely known coating methods, and its composition is typically composed of a booth, a spray nozzle, an air hose, an air transformer, and a compressor. The material lowered to a low viscosity by a heating machine is supplied to a spray nozzle through a pressure supply device such as a pressure tank or a pump, and then sprayed through a small hole in each nozzle tip using a high pressure compressor to coat it. The pattern size or spraying speed can be controlled using a pressure control device to minimize overspray, and the coating speed is high, so productivity is improved, and uniform coating is possible, resulting in high arrival efficiency.

The roller coating method is a method in which the sheet moves between rollers and is coated. It is a coating method suitable for flat plates. A compound is placed between two rollers and is coated on a roller by rotation. It is attached to the release film. At this time, the thickness of the coating film becomes thicker or thinner depending on the speed of the release film, the viscosity of the material, and the distance between the roller and the release film. The advantage of this method is that the material is less wasted and the coating speed is fast.

The curtain-flow coating method consists of a conveyor, a pressure valve, a pump, a filter, and a tank. The pressurized material is coated in the form of a thin film of a certain width by continuously flowing down from the top in the form of curtains from several nozzles through the gap in the slit state, and passing the conductor through the conveyor below.

All remaining substances flowing down while adhering to the object are recovered and automatically circulated from the container to the pump head. The advantage of this method is that the loss of material is very small, the coating speed is fast, and the thickness of the coating film is uniform.

Steps 2 to 5 are steps of sequentially laminating the above-described core material layer, the waterproof layer including copper powder, the strength reinforcing layer, and the transparent film layer on the adhesive layer coated on the release film.

The detailed description above is illustrative of the present invention. In addition, the above description shows and describes preferred embodiments of the present invention, and the present invention can be used in various other combinations, modifications and environments. That is, changes or modifications may be made within the scope of the concept of the invention disclosed in the present specification, the scope equivalent to the disclosed contents, and/or the skill or knowledge of the art. The above-described embodiments describe the best state for implementing the technical idea of the present invention, and various changes required in the specific application fields and uses of the present invention are possible. Therefore, the detailed description of the invention is not intended to limit the invention to the disclosed embodiment. In addition, the appended claims should be construed as including other embodiments.

Claims (6)

Release film;
A coating material layer laminated on the release film; And
A transparent film layer laminated on the coating material layer; Including,
The coating material layer,
Including an adhesive layer, a core material layer and a waterproof layer,
The waterproof layer is 64 to 110 parts by weight of asphalt, 0.92 to 3.8 parts by weight of styrene butadiene styrene rubber, 30 to 50 parts by weight of photosensitive resin, 2.4 to 5 parts by weight of thickening stabilizer, based on 100 parts by weight of aluminum powder obtained by drying aluminum hydroxide, 1.6 to 2 parts by weight of a curing accelerator, 0.3 to 0.44 parts by weight of polypropylene fibers, 0.24 to 0.36 parts by weight of silica metal, 3 to 4.6 parts by weight of dolomite, 70 to 90 parts by weight of calcium carbonate, and 70 to 120 parts by weight of a filler,
The waterproof layer is a waterproof sheet having excellent radon blocking effect further comprising copper powder.
The method of claim 1,
The transparent film layer,
Polyester resin including polyethylene terephthalate (PET), polyethylene naphthalate (PEN) and polybutylene terephthalate (PBT), polyolefin resin including polypropylene (PP) and polystyrene (PS), nylon-6 And polyamide (PA), polycarbonate (PC), polyacrylonitrile (PAN), polyimide (PI) including nylon-66, coated polyethylene terephthalate (PVA-PET, PVDC-PET, EVOH-PET) ), a transparent film comprising at least one of ethylene vinyl alcohol (EVOH) and polyvinylidene chloride (PVDC); An excellent waterproof sheet containing radon blocking effect.
The method of claim 2,
The coating material layer,
An adhesive layer laminated on the release film and comprising copper powder,
A center material layer laminated on the adhesive layer,
Laminated on the core layer, and based on 100 parts by weight of aluminum powder obtained by drying aluminum hydroxide, 64 to 110 parts by weight of asphalt, 0.92 to 3.8 parts by weight of styrene butadiene styrene rubber, 30 to 50 parts by weight of photosensitive resin, 2.4 to thick stabilizer 5 parts by weight, 1.6 to 2 parts by weight of a curing accelerator, 0.3 to 0.44 parts by weight of polypropylene fiber, 0.24 to 0.36 parts by weight of silica metal, 3 to 4.6 parts by weight of dolomite, 70 to 90 parts by weight of calcium carbonate and 70 to 120 parts by weight of a filler A waterproof layer comprising, and
A waterproof sheet having an excellent radon blocking effect including a strength reinforcing layer laminated on the waterproof layer.
The method of claim 3,
The waterproof layer is
A waterproof sheet having excellent radon blocking effect further comprising 10 to 60 parts by weight of an adsorbent based on 100 parts by weight of aluminum powder.
The method of claim 4,
The adsorbent is a waterproof sheet excellent in radon blocking effect, characterized in that at least one selected from activated carbon and zeolite.
The method of claim 2,
The adhesive layer,
It is made of an adhesive composition comprising a process oil, a modifier, an adhesion enhancer, a heat resistance enhancer, a compatibilizer, and copper powder,
The modifier is,
SBS (Styrene-Butadiene-Styrene), SIS (Styrene-Isoprene-Styrene), SB (Styrene Butadiene), SBR (Styrene-Butadiene Rubber), SEBS (Styrene ethylene butadiene styrene) and EVA (Ethylene vinyl acetate) At least one of the waterproof sheets with excellent radon blocking effect.

The center material layer,
At least one selected from the group consisting of polyethylene (PE) woven fabric, polypropylene (PP) woven fabric, polypropylene (PP) non-woven fabric, high-density polyethylene (HDPE) woven fabric, high-density polyethylene (HDPE) non-woven fabric, and polyester non-woven fabric has a radon blocking effect. Excellent waterproof sheet.