KR102034513B1 - Waterproofing seat with minimal air-pocket generation and waterproofing method usign the same - Google Patents

Abstract

The present invention relates to a waterproof seat with minimal air pocket generation and a construction method using the same and, more specifically, to a waterproof seat, which comprises: a lower nonwoven layer; a PVC intermediate layer laminated on the lower nonwoven layer; a polyester fabric layer having a lattice mesh structure and laminated on the upper surface of the PVC intermediate layer; and an upper nonwoven layer laminated on the upper surface of the fabric layer, wherein a hollow glass bubble is included in the PVC intermediate layer, and to a construction method using the same.

Description

Waterproof seat with minimal air pocket and construction method using same {WATERPROOFING SEAT WITH MINIMAL AIR-POCKET GENERATION AND WATERPROOFING METHOD USIGN THE SAME}

The present invention relates to a waterproof sheet and a construction method using the same to minimize the generation of air pockets, and more particularly, the lower non-woven fabric layer, the PVC intermediate layer laminated on the lower nonwoven fabric layer, laminated on the upper surface of the PVC intermediate layer and lattice-type netting It is composed of a polyester fabric layer having a structure and an upper non-woven fabric layer laminated on the upper surface of the fabric layer, and the waterproof sheet and a construction method using the same, characterized in that the hollow glass bubble is contained inside the PVC intermediate layer. .

In general, waterproof construction is essential for the rooftop or parking lot of a building structure to prevent leakage due to rainfall. There are various kinds of waterproofing methods are used, mainly used for waterproofing the mortar liquid, waterproofing water-soluble or useful coating, asphalt waterproofing and waterproof sheet.

Among them, the waterproof sheet is manufactured to a certain standard based on synthetic rubber, synthetic resin, or rubberized asphalt with excellent elasticity, and it is installed on the base surface where waterproofing is required to form a waterproofing layer, so that the construction is relatively in comparison with other construction methods. It is one of the waterproofing methods that are widely used today because of its simple and short construction period.

Such a waterproof sheet is manufactured to have a predetermined width and length in advance in the factory, and is wound on a roll, so that the waterproof sheet is rolled up at a predetermined interval on the base surface while winding the waterproof sheet during installation. Particularly, when the construction area is large, several waterproof sheets are overlapped with each other to facilitate construction and handling in the field, and in this case, a connection part between the sheets occurs. This connection part is the most vulnerable part of the waterproof sheet, and if its treatment is not appropriate, leakage occurs through this part, which leads to a waterproof defect.

In addition, the waterproof sheet should be manufactured to have a certain level of thickness for ease of storage and construction, as it is a sheet-type waterproofing material rather than a liquid form, and thus has a disadvantage in that a lot of weight and cost are high.

Therefore, by reducing the weight of the waterproof sheet while maintaining the performance of the waterproof sheet, it is necessary to develop a waterproof sheet that can reduce the manufacturing cost and at the same time facilitate transport, storage and construction to minimize the connection area for a large area. It was.

In addition, the existing waterproof sheet is generally finished with a urethane or the like after the waterproof sheet construction, at this time, the air pocket is generated as the solvent vaporizes during the curing of the urethane, etc., which causes leakage or cracks There was this.

Therefore, it is necessary to develop a waterproof sheet that can minimize the leakage or cracking problems caused by the air pocket by allowing the bubbles generated during the urethane curing process to properly escape to the outside.

Republic of Korea Patent Publication No. 10-1727716

The present invention is to solve the problems as described above, by reducing the weight while maintaining the thickness and performance of the waterproof sheet as it is, the waterproof sheet that can be easy to construct and handle the waterproof sheet and at the same time lower production and construction cost It is an object to provide a construction method using the same.

In addition, an object of the present invention is to provide a waterproof sheet and a construction method using the same so that bubbles generated during the urethane curing process to properly escape to the outside to minimize the problem of water leakage or cracks caused by the air pocket.

These and other objects and advantages of the present invention will become apparent from the following description of preferred embodiments.

In order to achieve the above object, the present invention provides a lower nonwoven fabric layer, a PVC interlayer laminated on the lower nonwoven fabric layer, a fabric layer made of a polyester material having a lattice mesh structure and laminated on the upper surface of the PVC interlayer, and the fabric layer. The upper non-woven fabric layer is laminated on the upper surface, the PVC interlayer provides a waterproof sheet, characterized in that it comprises a hollow glass bubble.

The PVC interlayer, based on 100 parts by weight of the total PVC interlayer, excluding the glass bubbles, preferably 5 to 10 parts by weight of glass bubbles, the glass bubble has a diameter of 10 to 30㎛ and porosity of 30 to 90% It is desirable to have.

In addition, the glass bubble may be generally used all of the commercially available glass bubbles, preferably glass bubbles surface-treated by silicone oil may be used to further increase the miscibility.

In this case, the silicone oil may be used a variety of commercially available silicone oil, specifically, dimethyl silicone oil (dimethyl silicone oil), methylphenol silicone oil (methylphenol silicone oil), methyl hydrogen silicone (methyl hydrogen silicone oil), amino modified silicone oil, epoxy modified silicone oil, carboxyl modified silicone oil, carbinol modified silicone oil, polyether modified silicone oil, alkyl modified silicone oil, fluorine modified silicone oil and the like can be used.

The viscosity of the silicone oil is not particularly limited, but is preferably 20 to 500 cSt, and the method of surface treatment with the silicone oil is not particularly limited, and after dissolving the silicone oil in a solvent such as toluene, A wet method of dispersing the glass bubble and evaporating the solvent to attach the silicone oil to the glass bubble surface, or a dry method of spraying the silicone oil on the glass bubble to attach the silicone oil to the glass bubble surface and performing a predetermined heat treatment may be used. have.

In addition, the intermediate layer is made of 100 parts by weight of PVC, in order to increase the flexibility and elasticity of the sheet itself, and to prevent cracking due to the glass bubble, it may further include 10 to 30 parts by weight of the soft polymer, glass bubble is In order to minimize the outflow from the interlayer, it may further comprise 5 to 10 parts by weight of cyclodextrin.

Meanwhile, the upper or lower nonwoven layer may include particulate activated carbon dispersed in and adsorbed on the nonwoven fabric to prevent static electricity and impart flame retardancy to the sheet. At this time, the non-woven fabric layer preferably includes a heat sealable fiber to prevent separation of activated carbon and thermal bonding with other layers, and for a sufficient heat seal effect, the content ratio of long fibers and heat sealable fibers Is preferably from 10: 1 to 5: 1 (w / w).

The heat-sealable fiber may be one obtained by melt kneading and spinning an amorphous polyester-based polymer and an amorphous polyetherimide-based polymer in a ratio of 2: 1 to 1: 2, and those which are not stretched after spinning may be used. It is desirable to

In addition, the fabric layer formed on top of the intermediate layer is to use a fabric surface treated by immersing in an antistatic composition comprising conductive polymer colloid particles, two or more surfactants, water and a polar solvent in order to minimize the antistatic desirable.

On the other hand, in order to achieve the above object, the present invention comprises the steps of forming a primer layer on the base surface, forming a primary urethane coating film on the primer layer, the first or second on the primary urethane coating film It provides a waterproof method comprising the step of laying a waterproof sheet of claim and the step of forming a secondary urethane coating film on the waterproof sheet.

Waterproof sheet of the present invention can reduce the weight while maintaining the thickness and performance of the general waterproof sheet as it is, it is possible to ease the construction and handling of the waterproof sheet and at the same time lower the production and construction cost. In addition, due to the hollows formed in the sheet, a thermal insulation effect can also be obtained additionally.

In addition, the waterproof sheet of the present invention can minimize the problem of water leakage or cracks caused by the air pocket by allowing the bubbles generated in the urethane curing process to properly exit to the outside.

Hereinafter, the present invention will be described in detail with reference to embodiments of the present invention. These examples are only presented by way of example only to more specifically describe the present invention, it will be apparent to those skilled in the art that the scope of the present invention is not limited by these examples. .

Also, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and in the case of conflict, the specification including definitions The description of will prevail.

The waterproof sheet of the present invention is laminated on the lower nonwoven fabric layer, the PVC intermediate layer laminated on the lower nonwoven fabric layer, the upper surface of the PVC intermediate layer and a polyester fabric layer having a lattice mesh structure and the upper surface of the fabric layer Consists of an upper nonwoven layer, the PVC interlayer is characterized in that it comprises a hollow glass bubble.

The waterproof sheet includes glass bubbles in the intermediate layer, thereby reducing the weight of the entire waterproof sheet and at the same time obtaining a heat insulating effect. At this time, the PVC intermediate layer, it is preferable to include 5 to 10 parts by weight of the glass bubble, based on 100 parts by weight of the total PVC interlayer except glass bubble. When the content of the glass bubble is less than 5 parts by weight, a sufficient weight loss and adiabatic effect can be obtained, and if it exceeds 10 parts by weight, the strength and elasticity of the waterproof sheet may be reduced.

In addition, the glass bubble preferably has a diameter of 10 to 30㎛ and porosity of 30 to 90%. If the size of the glass bubble exceeds 30㎛ the overall elasticity and stability is lowered, if less than 10㎛ it is difficult to expect the weight loss and insulation effect due to the use of the glass bubble. In addition, when the porosity of the glass bubble exceeds 90%, the stability of the glass bubble is lowered, if less than 30% it is difficult to expect a functional effect due to the use of the glass bubble.

In addition, the glass bubble may be generally used a variety of commercially available glass bubbles, preferably glass bubbles surface-treated with silicone oil may be used to further increase the miscibility.

In this case, the silicone oil may be used a variety of commercially available silicone oil, specifically, dimethyl silicone oil (dimethyl silicone oil), methylphenol silicone oil (methylphenol silicone oil), methyl hydrogen silicone (methyl hydrogen silicone oil), amino modified silicone oil, epoxy modified silicone oil, carboxyl modified silicone oil, carbinol modified silicone oil, polyether modified silicone oil, alkyl modified silicone oil, fluorine modified silicone oil and the like can be used.

Although the viscosity of the said silicone oil is not specifically limited, It is preferable to use the thing of 20-500 cSt, and the method of surface treatment by a silicone oil is not specifically limited. For example, a wet method of dissolving a silicone oil in a solvent such as toluene and then dispersing the glass bubble in the solvent and evaporating the solvent to attach the silicone oil to the surface of the glass bubble, or spraying the silicone oil on the glass bubble to glass bubble A dry method of attaching the silicone oil to the surface and performing a predetermined heat treatment may be used.

The content of the silicone oil adhering to the glass bubble surface is preferably 2 to 4 parts by weight based on 100 parts by weight of the glass bubble. If smaller than this, it is difficult to play a role of increasing the degree of miscibility, and if larger than this, the glass bubble may have an effect of aggregation.

In addition, the intermediate layer is made of 100 parts by weight of PVC, in order to increase the flexibility and elasticity of the sheet itself, and to prevent cracking due to the glass bubble, it may further include 10 to 30 parts by weight of the soft polymer. The soft polymer may be a variety of materials that can impart flexibility and elasticity to the intermediate layer, but is preferably ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, butane diol, neopentyl glycol, pentanediol , Polyester resins obtained by condensation reaction of diols such as hexanediol and dibasic acids such as adipic acid, succinic acid and terephthalic acid may be used.

When the content of the soft polymer polymer is too small, the splitting of the intermediate layer due to the glass bubble may occur, and when too much, the adhesive force or the fixing force of the glass bubble may decrease.

On the other hand, in order to minimize the outflow of the glass bubble from the intermediate layer, the intermediate layer may further comprise 5 to 10 parts by weight of cyclodextrin. The cyclodextrin is a cyclic compound composed of a glucose group as a repeating unit, which forms a complex with glass bubble and other additives such as the soft polymer polymer, and immobilizes the additives by immobilizing the additives by hydrogen bonding, etc. It is possible to minimize spills and impart stability to the sheet itself.

As the cyclodextrin, various cyclodextrins commercially available may be used, and in one embodiment, 2,3,6-tri-O-naphthoyl-beta-cyclodextrin may be used.

On the other hand, the non-woven fabric layer formed under the intermediate layer serves to provide a thermal insulation effect to the sheet and to facilitate the heat bonding with other waterproofing material, a general long fiber nonwoven fabric of polyester or polypropylene may be used.

In order to prevent static electricity and impart flame retardancy to the sheet, the nonwoven fabric layer may be a form in which particulate activated carbon is dispersed and adsorbed inside the nonwoven fabric. At this time, the non-woven fabric layer preferably contains a certain amount of heat-sealing fibers to prevent the separation of activated carbon and thermal bonding with other layers, and for sufficient heat sealing effect, the heat-sealing fibers of the entire nonwoven fabric It is preferable that 10-25 weight% is included. The heat-sealable fiber may be one obtained by melt kneading and spinning an amorphous polyester-based polymer and an amorphous polyetherimide-based polymer in a ratio of 2: 1 to 1: 2, and those which are not stretched after spinning may be used. It is desirable to

In order to increase the tensile strength of the sheet and to impart breathability, the intermediate layer is formed of a polyester fabric layer having a lattice mesh structure. An upper nonwoven layer is formed on the fabric layer as described below, and a urethane coating film is formed thereon, whereby an air pocket generated as the urethane coating film is cured falls out through the space formed between the intermediate layer, the fabric layer, and the nonwoven layer. Will go out.

In this case, in order to minimize the antistatic, the fabric layer is preferably formed by using a surface-treated fabric immersed in the antistatic composition.

The antistatic composition may be used in a variety of products, in one embodiment it is preferable to use a composition comprising a conductive polymer colloidal particles, two or more surfactants, water and a polar solvent. When the fabric is treated using the composition, adsorption is performed in a state in which the conductive polymer is laminated on the inside and the surface of the fabric, and according to the principle that static electricity is self-discharged due to the low surface resistance of the conductive polymer, You can give a function.

The conductive polymer colloidal particles are in a state in which materials are dispersed in particles larger than atoms or small molecules, and a polar solvent such as water may be used as a solvent, and once prepared in a stable colloidal particle state, may be mixed indefinitely with water. .

The conductive polymer is not particularly limited, but may be used alone or two or more of polyaniline, polypyrrole, polythiophene, poly (P-phenylene), poly (P-phenylenevinylene) and derivatives thereof. The average molecular weight is preferably 20,000 to 1,000,000. When the molecular weight is in the above range, the conductive polymer tends to be in a colloidal state and is excellent in dispersibility. The conductive polymer colloidal particles are preferably present in the total composition of 0.5 to 30% by weight.

The solvent in the composition is not particularly limited as long as it is a solvent capable of dissolving or swelling at least part of the conductive polymer. The content of water and polar solvent may be determined as needed, for example, the weight ratio of water and polar solvent may be 100: 1 to 100: 50.

The said surfactant forms electroconductive polymer micelle in aqueous solution, and 2 or more types are used. As the surfactant, nonionic surfactants, anionic surfactants, cationic surfactants, amphoteric surfactants, and the like may be used, and it is preferable that 0.9 to 5% by weight of the total composition is contained. Increasing the amount more than necessary reduces the conductivity, and when the amount of the surfactant is too small, re-agglomeration and precipitation of the conductive polymer may occur.

The upper nonwoven fabric layer is formed on the fabric layer to prevent the urethane applied on the waterproof sheet from penetrating between the fabric layers, and serve to make a space for the air pockets to be released as the urethane coating is cured later.

In this case, a spunbond nonwoven fabric may be used as the upper nonwoven fabric layer, and a nonwoven fabric of general polyester or polypropylene material may be used in the same manner as the lower nonwoven fabric described above.

Like the lower nonwoven fabric layer, the nonwoven fabric layer may be a form in which particulate activated carbon is dispersed and adsorbed in the nonwoven fabric to prevent static electricity and impart flame retardancy to the sheet. At this time, it is also possible to use a non-woven layer containing a certain amount of heat-sealing fibers, so as to prevent the release of activated carbon and thermal bonding with other layers.

Each layer constituting the above-described waterproof sheet of the present invention may be manufactured by hot rolling after lamination in turn. On the other hand, the waterproof method using the waterproof sheet of the present invention is a step of forming a primer layer on the base surface, the step of forming a primary urethane coating film on the primer layer, the waterproof sheet of the present invention described above on the primary urethane coating film It may include the step of forming and forming a secondary urethane coating film on the waterproof sheet.

Looking at the waterproof method of the present invention in more detail, first prepare and clean the base surface. The base surface may be a base surface of the concrete floor. The base surface should be flat and dry without unevenness, water gradient should be formed in the drain direction, and dust and contaminants, etc., which hinder the adhesion of the waterproofing material, should be cleaned.

Next, a primer layer is formed on the base surface as needed. The primer is evenly applied to the entire part to be waterproofed and then dried to form a primer layer. As the primer, a urethane primer and / or an acrylic primer may be used.

Next, the first urethane coating film is applied on the primer layer, and the waterproof sheet of the present invention is constructed on the first urethane coating film, and these two steps may be performed at the same time. That is, while forming a primary urethane coating film, a waterproof sheet can be constructed at the same time.

At this time, a plurality of waterproof sheets are covered to overlap the joints. Since the waterproof sheet is formed in the form of a sheet and is attached to the primary urethane coating film, the connection portion may occur between the sheet and the sheet, and the connection portion may improve the watertightness of the joint by performing the overlapping joint construction. The overlap width of the waterproof sheet joint is preferably 60 to 80 mm. In addition, it is preferable to construct a waterproof sheet at a portion of the wall or pillar contacting the vertical surface at intervals of 5 to 10 mm from the vertical surface.

Then, reinforcing the joint and the end and the corner portion of the waterproof sheet. In this reinforcement step, the overlapping joint of the waterproof sheet is reinforced by using a floor reinforcing tape. The reinforcing tape is attached to the upper part of the joint, and then urethane is applied to the upper part of the joint. On the other hand, the end portion and the corner portion of the waterproof sheet is reinforced using a thermoplastic urethane (TPU: Thermoplastic Poly Urethane) reinforcing tape, a urethane sealant is used as the adhesive.

Since the TPU film has excellent abrasion resistance, flexibility and high tensile strength, and also has excellent adhesion to urethane, it is preferable to finish the TPU film at the overlapping seam or the end and the corner of the waterproof sheet.

When the joint and corner reinforcement is completed, a second urethane is applied to the entire upper surface of the waterproof sheet to form a secondary urethane coating film. At this time, the silica sand may be evenly sprayed to prevent slipping.

In the exposure method, after the secondary urethane coating film is cured, a top coat layer is formed on the secondary urethane coating film. In the exposure method, since the secondary urethane coating film is exposed to the outside, a top coat layer is formed to protect the secondary urethane coating film. As the top coat layer, urethane-based and / or acrylic resins may be used, and urethane-based resins are preferably used.

In the non-exposure method, after the secondary urethane coating film is cured, a protective mortar layer may be formed on the upper portion of the secondary urethane coating film, and then a plain concrete layer may be formed on the protective mortar layer. Mortar is a mixture of cement, lime, sand and / or water, kneaded, and plain concrete refers to concrete that is not reinforced with steel or other reinforcements such as steel. The secondary urethane coating film is not exposed by the protective mortar layer and the bare concrete layer formed thereon.

On the other hand, the waterproofing method for the vertical surface such as the wall surface or the pillar is similar to the waterproofing method for the base surface described above, the primer layer, urethane sealant layer, TPU reinforcing tape, urethane coating film, top coat layer is formed sequentially from the vertical surface can do.

In the present specification, only a few examples of various embodiments performed by the present inventors are described, but the technical idea of the present invention is not limited thereto, but may be variously modified and implemented by those skilled in the art.

Claims (3)

delete delete Forming a primer layer on the base surface; Forming a primary urethane coating on the primer layer; Laying a waterproof sheet on the primary urethane coating film; And forming a secondary urethane coating film on the waterproof sheet.
The waterproof sheet is a lower nonwoven fabric layer, a PVC intermediate layer laminated on the lower nonwoven fabric layer, a polyester fabric layer laminated on the upper surface of the PVC intermediate layer and having a lattice mesh structure and an upper nonwoven layer laminated on the upper surface of the fabric layer. It consists of
The PVC intermediate layer is waterproof, characterized in that it comprises a glass bubble of 5 to 10 parts by weight of the hollow form, based on 100 parts by weight of the total PVC interlayer except glass bubble.