KR100935712B1 - Polyurethane waterproof membrane structure using thermoplastic polyurethane film, and construction method thereof - Google Patents

Abstract

PURPOSE: A polyurethane waterproof membrane structure using a TPU film and a construction method thereof are provided to prevent the TPU film from exfoliating or getting torn by external force. CONSTITUTION: A construction method of a polyurethane waterproof membrane structure using a TPU film is as follows. Urethane primer(10) is spread out on a concrete bottom(1). A polyurethane resin coating layer(20) is formed by spreading liquefied urethane resin on the urethane primer. A TPU film(30) is laminated on the urethane membrane. A polyurethane resin coating layer(40) is formed on the TPU film by spreading the liquefied urethane resin and hardening.

Description

Polyurethane coating film waterproof structure using TPM film and construction method thereof {POLYURETHANE WATERPROOF MEMBRANE STRUCTURE USING THERMOPLASTIC POLYURETHANE FILM, AND CONSTRUCTION METHOD THEREOF}

The present invention relates to a polyurethane coating waterproof structure using a TPU film and a method for constructing such a waterproof structure, and more particularly, to a thermoplastic polyurethane (TPU ') film having excellent elongation in a liquid urethane coating waterproofing process. The present invention relates to a waterproof construction method that can achieve perfect waterproof performance even when cracking of concrete floor and upper concrete occurs. It has perfect adhesiveness with the lower body, high compliance with the movement of the lower body, resistance to external impact, easy construction of narrow or complex parts, and excellent durability and ease of repair.

Watertight construction is performed to form an impermeable waterproof layer on the surface of the structure in order to prevent moisture from penetrating the inside, such as the roof, floor, underground parking lot of the building, the joint of the building, and the like. Depending on the part to be waterproofed and the base materials such as reinforced concrete, lightweight concrete, ALC, PC, etc., depending on the ground condition or the waterproofing material, there are some differences in the structure and construction method. The most commonly used methods are asphalt waterproofing method, sheet waterproofing method, coating film waterproofing method and the like, and recently, a composite waterproofing method suitable for a situation such as a combination lamination method of these is applied.

Asphalt waterproofing method has been used for the longest time, many inconveniences in construction and recently used a ready-made asphalt sheet, but the problem of the self-cracking of the waterproof coating due to the temperature difference still remains.

Sheet waterproofing method is a method of manufacturing a synthetic rubber and the like in the form of a sheet having a predetermined thickness and width to adhere to the waterproof surface at the construction site to form a waterproof layer. This method is easy to implement the required physical properties through the various laminated structure in the manufacturing of the sheet, and the convenient construction, but difficult to construct a complex part, difficult to repair part, it is difficult to achieve the perfect water tightness at the joint between sheets, There is a problem that the sealing operation of the joints of the liver is performed by hand one by one. Recently, a variety of methods have been proposed for the complete watertightness of the seam between sheets, and the development of encouraging works continues. On the other hand, in this method, once the swelling phenomenon occurs, there is a problem that the coating film is damaged and the waterproof function is lost due to repeated shrinkage and expansion caused by the temperature difference. In addition, the overall weight increase is also pointed out as a problem.

There are several coating waterproofing methods depending on the type of material, and urethane waterproofing is typical. The urethane waterproofing method cleans up the floor to be constructed, applies primer to it, and penetrates the floor sufficiently to dry. Then, the liquid urethane resin is applied to the bottom surface to dry and harden to form a urethane coating film of a certain thickness. In this way, there is a relatively good adhesion to the concrete surface and excellent elasticity has the advantage that can maintain a certain degree of waterproof performance against the cracks of the base. In addition, it is relatively easy to construct a narrow place or a complex site, seamless construction is possible, as well as relatively easy to repair.

However, it is difficult to fundamentally solve the cracks of the lower surface because it is a method that adheres completely to the floor surface. If severe temperature changes, moisture evaporation of concrete, and cracks of floor concrete occur, swelling may occur as in the sheet method. There is a problem that the coating film is damaged and is continuously lifted up. In particular, in places such as parking lots, the urging of the urethane coating film occurs quickly due to repeated loads, and thus there is a problem of short waterproof life.

In addition, since the coating is applied in a liquid state in the working phenomenon because the flow is good, the coating film thickness may be uneven due to the bending of the bottom surface, the thickness of the coating film should be sufficiently formed, but there is a problem that is not easy. Usually, the urethane waterproofing agent is applied on the primer and then repeatedly applied to form the required thickness. At this time, the urethane waterproofing agent is first applied, the non-woven fabric, glass fiber, PE, etc. are laminated thereon, and the urethane waterproofing agent is applied again. Also used. The nonwoven fabric is used for the purpose of forming the thickness of the urethane waterproofing agent and the purpose of the reinforcing material, and they are poor in elongation and poor in tear strength, thereby causing damage or tearing due to repeated external force. In addition, the compatibility with polyurethane is not good, the problem of peeling off due to external force has emerged. At present, the urethane waterproofing layer or the reinforcing material layer can be used if only the requirements for each of them are provided and pass the standard, but when used in a manner of laminating them, there is no standard for evaluating the laminated layers as a whole. It is used without any sanction even though there may be a problem of peeling off the poor properties.

In addition, the difficulty in waterproofing the high occurrence rate of defects, such as inclined roof trench junction portion, rooftop junction portion, wall connection portion is still a problem.

The present invention has been made in view of the above problems of the urethane coating waterproofing method, lowers the incidence of defects due to the ground cracks of the bottom surface close contact type, the compatibility between the laminated urethane layer is not good due to peeling each other by external force To solve the problem of tearing, and to provide a waterproof structure and a construction method that can facilitate the construction of parts that are not easy to build, such as walls difficult to form a coating film thickness. In other words, it has a perfect adhesion to the lower body, high compliance with the movement of the lower body, resistance to external impact, easy construction of narrow or complex parts, excellent durability and easy to repair polyurethane structure And to provide a waterproof construction method using the same. In addition, to apply the present invention to achieve the watertightness of the inter-sheet joint in the sheet waterproofing method.

The present invention for this purpose in the waterproof construction method to form a waterproof layer on the concrete floor or wall (hereinafter referred to as 'concrete floor') of the construction structure so that no leakage occurs inside the structure, i) a urethane primer on the concrete floor Applying a; Ii) applying and curing a liquid urethane resin on the urethane primer; Iii) laminating a TPU film on top of the urethane coating film; Iii) coating and curing the liquid urethane resin on the TPU film upper portion; waterproof construction method comprising a. Alternatively, in the above method, the TPU film is directly attached to the upper layer of the primer without applying the liquid urethane resin and the liquid urethane resin is applied to the upper portion to cure or the liquid urethane resin is not applied to the upper portion of the TPU film. It can also be simplified. In addition, the coating of the liquid urethane resin may be repeated one or more times to form a desired thickness. In another aspect, the present invention provides a waterproof structure including a waterproof layer implemented by the construction method.

The present invention is a waterproof construction method of forming a waterproof layer on the concrete floor or wall (hereinafter referred to as 'concrete floor') of the construction structure so that no leakage occurs inside the structure, i) a cracked part or disappearance of the concrete floor Finding a portion; Ii) arranging by forming a cutting groove having a predetermined depth in the crack or missing portion; Iii) filling a urethane sealant into the cutting groove; Iii) laminating the TPU film on top of the urethane sealant; can be utilized for repairing the defect as a waterproof construction method comprising a.

The present invention provides a waterproof construction method to form a waterproof layer on the connection construction site having a high rate of water-resistant defects, such as inclined roof trench junction, rooftop junction, wall connection portion, ⅰ) in the waterproof construction method to prevent leakage into the structure; Filling a urethane sealant; Ii) laminating the TPU film on the urethane sealant; may be utilized for waterproofing the connection construction site by a waterproof construction method comprising a.

The present invention is a waterproof construction method for forming a waterproof layer on the joint portion formed between the waterproof sheet when installing the waterproof sheet on the concrete floor of the construction structure so that no leakage into the structure, i) the joint between the waterproof sheet Laminating the TPU film over the site; Waterproof construction method, characterized in that it comprises a can be utilized for the waterproofing of the inter-sheet connection.

In another aspect, the present invention provides a waterproof structure implemented by including the waterproofing layer for the above-described repair site, the connection construction site, the inter-sheet connection site. That is, an object selected from the group consisting of a urethane primer layer or coating film for waterproofing concrete, a urethane sealant for filling defects, and a waterproof sheet for waterproofing concrete; And, TPU film laminated on the object; And it provides a waterproof structure comprising a urethane coating film formed by coating and curing on the TPU film.

The urethane waterproof structure and construction method of the present invention lowers the incidence of defects due to the ground cracks of the bottom contact surface such as cracks, and solves the problem of peeling or tearing each other by external force due to poor compatibility between the laminated urethane layers. To provide a waterproof structure and a construction method that can facilitate the construction of parts that are not easy to construct. In other words, it has a perfect adhesion to the lower body, high compliance with the movement of the lower body, resistance to external impact, easy construction of narrow or complex parts, excellent durability and easy to repair polyurethane structure And to provide a waterproof construction method using the same. Moreover, it can apply and implement this invention at the time of the process of the inter-sheet joint of a sheet waterproofing method.

Hereinafter, the present invention will be described in more detail, and in describing the present invention, detailed descriptions of related well-known technologies or well-known structures will be omitted in order not to obscure the subject matter of the present invention.

The present invention is to achieve an improvement in the polyurethane coating waterproofing method and the polyurethane coating waterproof structure. As mentioned above, the polyurethane coating waterproofing method has many advantages, but it is difficult to solve the ground cracks due to the method of close contact with the floor surface. If large, the swelling phenomenon can occur as in the sheet method, the urethane coating film is damaged, and there is a problem that it is continuously lifted. These problems arise because of lack of adhesion or compatibility between layers.

First of all, the problem of the urethane coating waterproof structure caused by cracking of the lower limb is solved by applying a TPU film made of a raw material of the same type of polyurethane resin to the existing urethane coating waterproofing. TPU (thermoplastic polyurethane) film is a rubber-elastomer having a urethane bond in its molecular structure as an addition reaction of isocyanate and polyol and refers to a linear polymer. Due to the elasticity in the middle region of rubber and plastic, it has high resilience, mechanical stiffness, wear resistance, oil resistance, chemical resistance and cold resistance. In addition, since it is easy to blend with other resins, some other resins may be mixed in pellet form to use a molding machine of a general thermoplastic resin. Because of its properties as an elastomer, it is not torn or cracked by any external force, and also has excellent compatibility or adhesion with urethane sealant. Even if an increase occurs, this change can be accommodated to some extent. The TPU film according to the present invention may include not only 100% pure TPU, but also a film drawn by mixing a mixture of other PEs in a pellet form and the like, but does not impair compatibility with other layers of polyurethane material. In addition, mixed use will be possible within the range which does not significantly impair the elongation of TPU, and use within this range is within the scope of the technical idea of the present invention.

On the other hand, the urethane coating waterproofing method is applied in a liquid phase in the working phenomenon because the flow is good, the coating film thickness may be uneven due to the bending of the bottom surface, the thickness of the coating film should be sufficiently formed, but there is a problem that is not easy, 2 In the case of the liquid type, if a field worker makes a mistake in mixing and mixing a main agent and a curing agent, or fails to manage moisture in the lower limbs, bubbles may occur and fail to form a normal coating film. At present, it is mentioned that concrete cutting or fine cracking part uses V-cutting to reinforce the waterproof coating, and then sealant is applied, and then a non-woven fabric, glass fiber, PE, etc. are laminated and urethane waterproofing is applied again. It was. By the way, such a nonwoven fabric does not have good elongation property and tear strength is bad, and damage or tearing generate | occur | produce by repeated external force. Recently, due to such drawability problems, there are cases where an insulating film made of polyethylene is used. However, even in this case, the insulating film is peeled off under various external conditions and various bad conditions, thereby causing a problem in waterproofing, because compatibility with polyurethane is not good. In other words, the delamination phenomenon occurs over time, and the problem that the generated part is transferred to another part more quickly occurs.

Therefore, the present invention is to laminate the TPU film after forming the primary polyurethane coating film and to form a secondary polyurethane coating film, to make a structure that can compensate for the disadvantages of the liquid polyurethane coating film TPU film excellent in elongation of the concrete It is to achieve perfect waterproof performance against cracks or external forces. TPU film not only has excellent compatibility between polyurethane coatings, but also has a very good stretching force so as not to lose its waterproofing properties under adverse conditions.

1 is a view for explaining a waterproof structure for a concrete floor in one embodiment of the present invention shows a waterproof structure of the most basic form of the present invention. After the bottom of the concrete floor (1) is cleaned up, the basic urethane primer (10) is applied. Thereafter, the liquid urethane resin is applied and cured to form the polyurethane resin coating layer 20. Thereafter, the TPU film 30 is laminated on the urethane coating film. When laminating the TPU film, the joints are stacked to overlap each other, and the overlapping portions may be attached to each other with an adhesive urethane resin. Thereafter, the liquid urethane resin is applied and cured again to form another polyurethane resin coating layer 40. Although not shown in the drawings, the protective mortar, the pressing mortar, or the urethane top coating layer may be formed thereon, or other treatments may be applied. An important key point of the present invention is to laminate a TPU film between the polyurethane resin coating layers, and to have a waterproof structure including such a waterproof layer.

If referring to the modification, in the above structure, it may be applied except the polyurethane resin coating layer of the lower portion of the TPU film, or may be applied in an exposed type except the polyurethane resin coating layer of the upper.

In addition, the said polyurethane resin coating-film layers 20 and 40 can also be repeatedly performed once or more as needed. This is to adjust the thickness of the coating film according to the characteristics of the factory.

Of course, it is also possible to repeat the construction of the structure.

Figure 2 is an embodiment of the present invention, a view for explaining the waterproof structure for the loss portion of the concrete floor, when the repair or repair work on the concrete floor portion, can be applied during the loss portion treatment.

First, find the concrete floor (2) with a loss or loss of part, and in order to properly fill the part, to arrange a cutting groove of a certain depth, and the like. The urethane sealant 50 is filled in the cutting groove portion. Urethane sealant in the present invention is considered to mean a filler of a urethane material inclusive. In addition, the coating of the urethane primer for adhesion between the lower portion of the concrete and the urethane sealant, such as the burned-out portion, may be carried out even if not mentioned, and detailed descriptions thereof will be omitted so as not to obscure the essential points of the present invention. In the conventional method, reinforcing fabric such as glass fiber woven fabric or synthetic nonwoven fabric is used, but it is not preferable due to the above-mentioned problems, and in the present invention, after filling, the TPU film is used to cover the loss part. Of course, on top of that, it is possible to form a waterproof structure as described in Figure 1, or may form a conventional conventional urethane coating waterproof structure, the key point in the treatment of the loss or defect generation portion, Figure 2 It includes the structure of the form described in.

Although this type of structure may seem very simple, it provides a very effective waterproof structure, which is very compatible with the layers by using the same material, and due to the elasticity of the TPU, it is very responsive to external force action. Interpreted as In the prior art, in the case of laminating a relatively large number of layers of different materials, interlaminar peeling may be noticeable and construction may be inconvenient, but in the case of the present invention, the convenience of construction is, of course, simple but effective. There is prominence.

On the other hand, the specification of the TPU used in the present invention is preferably at least 450% elongation in the experiment based on KSF 3211, tensile strength 4 or more (N / mm ² ), tear strength 2 or more, SHORE A hardness 80 ~ 90 This is preferred. In general, since the TPU film satisfies the above conditions, the technical idea of the present invention is not unambiguous, although the specification is not limited thereto. I want to.

Figure 3 is an embodiment of the present invention, a view for explaining a waterproof structure for the waterproofing of the connection portion, such as the wall surface, the bent or narrow portion, with respect to the part difficult to apply the general sheet waterproofing method It is for demonstrating the case where the TPU film of this invention is used. The factory may be a connection construction site with high occurrence rate of waterproof defects such as a slope roof trench junction, a rooftop junction, and a wall joint.

Connecting parts such as walls 3 are vulnerable to waterproofing. Conventionally, such a part is applied by applying a reinforcement cloth, or further, an inclined slab or rooftop joint is constructed by using an insulating tape under the reinforcement cloth. As mentioned above, these parts are often peeled off or damaged by external forces, and thus cannot be recommended. In the present invention, the urethane sealant 50 is filled in the connection construction site and the like, and the TPU film 30 is laminated thereon. As mentioned above, it is of course possible to apply a urethane primer or the like to enhance adhesion before urethane sealant treatment. The key point of the present invention is to use a TPU, rather than a conventional reinforcement, after treating the urethane sealant, to provide a waterproof structure comprising such a structure. Therefore, it is apparent to those skilled in the art that forming a urethane coating film after lamination of the TPU film, and then pressing mortar or the like, or selecting an unexposed or exposed form can be modified as necessary by those skilled in the art. Therefore, a conventional coating film waterproofing structure may be provided after the basic treatment, and it is preferable to provide a urethane coating film / TPU film / urethane coating film in the form described above. On the other hand, if the place is an inclined slab, it may be finished with a TPU film, which is considered as deformable by those skilled in the art.

Figure 4 is an embodiment of the present invention, a view for explaining an example applied to the waterproofing of the seam between sheets when using a waterproof sheet. Although the drawings are slightly exaggerated, the key point is that the TPU film 30 is laminated on the inter-sheet connection.

In the sheet waterproofing method, the connection form or method between the sheets 60 becomes a very important problem. This is because the incidence of defects in the connection part is high. When the sheets and the sheets overlap, the conventional form is to improve the manner of bonding, or to leave a little space between the filling and filling the reinforcement cloth over them again. The present invention has a structure in which the TPU film 30 is laminated on the connection part between sheets regardless of the conventional overlapping method or floating form. Preferably, the finish on the top of the TPU film is a urethane coating. In addition, in the composite construction form of the urethane coating film / sheet lamination / urethane coating film, the sheet is also considered to be preferable to use a TPU film for the inter-sheet joint portion.

Hereinafter, the present invention will be described in more detail based on the following examples. However, the following examples are only for illustrating the present invention, and the present invention is not limited to the following examples and may be changed to other embodiments equivalent to substitutions and equivalents without departing from the technical spirit of the present invention. Will be apparent to those of ordinary skill in the art.

Example 1

In the present embodiment, the form of FIG. 1 and FIG. 2 were to be tested in combination, and the test was performed by forming a waterproof layer structure on the concrete floor together with the treatment of the defects. A concrete plate having a width of 40 cm and a thickness of 7 cm is prepared to form a V cut having a depth of 10 mm of 15 cm. In addition, a 10 mm diameter hole was drilled and this part was left unfilled. Then, the urethane sealant is injected into the cutting groove and filled, and the TPU is cut and laminated to sufficiently cover the sealant thereon. On top of that, Kolon's urethane primer (product name KUT-11) is applied in an amount of 0.3 kg / m ² . After about 2 hours, Kolon's non-tar urethane (KUT-80NT & KUT-82NT) was coated with about 3 Kg / m ² , and Kolon's Koniella film (KONY-ELLAS-200 film; TPU) was applied on the cured coating film. )). Kolon's non-tar urethane (KUT-80NT & KUT-82NT) is applied to about 1.5Kg / m ² to complete the waterproof layer.

Comparative Example 1

In Example 1, the epoxy is injected into the cutting groove, the nonwoven fabric is laminated, and the waterproof layer is completed as in Example 1.

Comparative Example 2

In Comparative Example 1, the nonwoven fabric is used instead of the TPU in the urethane waterproofing layer to complete the waterproofing layer.

Comparative Example 3

In Example 1, the polyethylene insulating film is used instead of the TPU in the urethane waterproofing layer to complete the waterproofing layer.

Comparative Example 4

In Example 1, the waterproof layer is completed using a polyethylene insulation film instead of a TPU on the urethane sealant layer.

Test Example 1

After curing at room temperature, nitrogen pressure was applied through the hole in the bottom of the plate, and it was examined whether the phenomenon of lifting occurred. And a part of the waterproof layer was cut and the elongation rate was examined. In addition, the interlayer peeling was examined.

This is shown in Table 1.

division Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Lifting none Occur Occur none Occur Elongation (%) 580 520 2 19 530 Peel off none Presence (some) existence existence Presence (some)

In the case of Example 1 and Comparative Example 3, in which the flaw-producing part was treated with a urethane sealant and laminated with a TPU film, there was no lifting phenomenon, and in the case of Comparative Example 4, the lifting phenomenon was used. The compatibility between materials can be seen as an important factor, which shows that it is very effective to use TPU film in the basic treatment part of defect repair. In addition, in the case of Example 1 did not occur peeling phenomenon between the waterproof layer, it can also be seen that the compatibility between the material used is an important factor. On the other hand, although not specified in the table, in Comparative Example 1 and Comparative Example 4, the peeling phenomenon between the urethane / TPU / urethane is inadequate, and the peeling phenomenon with the base layer which repaired the defect was knocked out, so that the waterproof layer has excellent elongation rate. In the case of using the TPU film, it can be seen that the adaptability to external force is excellent, and the compatibility between materials is excellent only when the compatibility between materials is excellent.

Similar results were found in the connection method between the wall, the connection part, and the waterproof sheet.

1 is a view for explaining a waterproof structure for the concrete floor in one embodiment of the present invention,

Figure 2 is an embodiment of the present invention, a view for explaining a waterproof structure for the loss of the concrete floor,

Figure 3 is an embodiment of the present invention, a view for explaining a waterproof structure for waterproofing the connection portion, such as the wall surface,

Figure 4 is an embodiment of the present invention, when the waterproof sheet is used to show an example applied to the waterproofing of the joint between the sheets between the slightly exaggerated display.

<Brief Description of Drawings>

1, 2, 3: concrete floor, or flaw occurs on the floor, or wall

10: urethane primer 20, 40: urethane resin coating layer

30: TPU film 50: urethane sealant layer

60: sheet

Claims (9)

In the waterproof construction method of forming a waterproof layer on top of a concrete floor or wall (hereinafter referred to as 'concrete floor'), If there is no crack or loss on the concrete floor, Applying a urethane primer to the concrete floor; Forming a first urethane resin coating layer by coating and curing a liquid nontar urethane resin on the urethane primer; Stacking a TPU film on top of the first urethane resin coating layer so that the joints of the TPU film overlap each other and attaching the overlapping portions to an adhesive urethane resin; And Through the main treatment process comprising the step of forming a second urethane resin coating layer by coating and curing the liquid non-tar urethane resin on the TPU film, If there is a crack or disappearance on the concrete floor, Arranging by forming a cutting groove having a predetermined depth in the crack or missing portion; Applying a urethane primer to the cutting groove; And Polyurethane coating film waterproof construction method using a TPU film after the pretreatment process comprising the step of filling the urethane sealant in the cutting groove is coated with the urethane primer. delete delete delete delete delete delete delete In the waterproof structure to form a waterproof layer on top of a concrete floor or wall (hereinafter referred to as 'concrete floor'), A cutting groove having a predetermined depth is formed in the cracked or missing portion of the concrete floor, and the urethane primer layer 10 is formed by applying a urethane primer to the concrete floor and the cutting groove; A urethane sealant filled in the cutting groove to which the primer is applied; A first urethane resin coating layer 20 formed by applying and curing a liquid non-tar urethane resin on the urethane sealant; Stacking a TPU film on the first urethane resin coating layer 20, wherein the joints of the TPU film overlap each other, and attaching the overlapping portions to the first urethane resin coating layer 20 using an urethane resin capable of bonding; And Polyurethane coating film waterproof structure using a TPU film, characterized in that it comprises a; a second urethane resin coating layer 40 formed by applying and curing the liquid non-tartar urethane resin on the TPU film layer 30.

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