KR102523995B1 - Exposed waterproof sheet - Google Patents

Abstract

The present invention relates to an exposed waterproof sheet, and more specifically, to an exposed waterproof sheet with excellent tensile strength and a low elongation rate. The exposed waterproof sheet comprises: an asphalt compound layer which is attached to a construction surface; and a mesh network which is formed of glass fiber, and is attached to the asphalt compound layer.

Description

Exposed waterproof sheet {EXPOSED WATERPROOF SHEET}

The present invention relates to an exposed-type waterproof sheet, and more particularly, to an exposed-type waterproof sheet having excellent tensile strength and low elongation.

If water leakage occurs in a building structure that is exposed to the external environment, such as a roof of a building, an underground parking lot, or a bridge, the deterioration of the building structure not only significantly reduces the life span of the structure, but also causes serious problems in safety. can

Waterproof construction means a construction act to prevent the inflow of water from the outside in order to suppress the occurrence of the above problems.

Conventionally, a method of applying a waterproofing liquid such as urethane to the construction surface has been used for waterproof construction. However, since the thickness of the waterproof layer is non-uniform according to the shape of the construction surface, recently, waterproof construction of constructing a waterproof sheet on the roof of a building has been performed.

Waterproof construction in which such a waterproof sheet is installed on the roof, etc. is divided into non-exposed waterproof construction in which the waterproof method is applied inside the finishing surface of the building, and exposed waterproof sheet in which the waterproof sheet is exposed by attaching the waterproof sheet to the finished surface (construction surface) do.

In addition, waterproof construction using waterproof sheets includes overlapping waterproof construction in which adjacent waterproof sheets are overlapped and non-overlapping waterproof construction in which neighboring waterproof sheets are attached so that they do not overlap (Patent No. 10-2222268 (hereinafter referred to as Patent No. 10-2222268). see prior art)).

Meanwhile, recently, in order to utilize the rooftop space of a building, a rooftop park or a smoking space is being installed.

Therefore, a lot of people use the rooftop of a building, and the above-described prior art is deformed or damaged, and problems such as not maintaining the waterproof function for a long time are occurring.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an exposed type waterproof sheet having excellent tensile strength and low elongation, which is more durable.

Another object of the present invention is to provide an exposed waterproof sheet that can effectively maintain its shape.

Another object of the present invention is to provide an exposed waterproof sheet capable of reducing glare.

The present invention for the purpose of solving the above problems has the following configuration and characteristics.

An asphalt compound layer attached to the construction surface; and a mesh network formed of glass fibers and attached to the asphalt compound layer.

In addition, the mesh network may further include a reflective layer embedded in and attached to the asphalt compound layer, including aluminum, and provided on an upper portion of the asphalt compound layer.

In addition, a first film layer including high-density polyethylene (HDPE) and provided on the reflective layer, polyethylene terephthalate (PET) and high-density polyethylene (HDPE) provided on the first film layer, and the polyethylene terephthalate A second film layer provided on the upper portion of the rate may be included.

The present invention having the above constitution and characteristics has an effect of excellent tensile strength and excellent durability due to low elongation.

In addition, the present invention has an effect that the shape can be effectively maintained.

In addition, the present invention has an effect of reducing glare.

1 is a cross-sectional view for explaining an exposed waterproof sheet according to an embodiment of the present invention.
2 is a plan view for explaining a mesh network.
3 is a diagram for explaining an additional embodiment of the present invention.

Since the present invention can have various changes and various forms, the implementation examples (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to a specific form disclosed, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and scope of the present invention.

Terms used in this specification are only used to describe a specific embodiment (aspect, aspect, aspect) (or embodiment), and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as ~comprising~ or ~consisting of are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

~First~, ~Second~, etc. described in this specification will only be referred to to distinguish different components from each other, regardless of the manufacturing order, and the names in the detailed description and claims of the invention may not match.

Throughout the present specification, when a part is said to be "connected" to another part, this includes not only the case of being "directly connected" but also the case of being "indirectly connected" with another element intervening therebetween. do.

1 is a cross-sectional view for explaining an exposed waterproof sheet according to an embodiment of the present invention. 2 is a plan view for explaining a mesh network.

The exposed waterproof sheet (S) according to an embodiment of the present invention is attached to the surface of a concrete building to add waterproofness, but to improve durability, and will be referred to as 'this sheet' hereinafter for convenience of description.

1 and 2, this sheet (exposed waterproof sheet (S) according to an embodiment of the present invention) includes an asphalt compound layer (1) and a mesh network (4).

The asphalt compound layer (1) is attached to the top of the construction surface (C). Here, the upper side (top, upper surface, etc.) means the upper side (upper, upper surface, etc.) with reference to FIG. 1, and the lower side (lower, lower surface, etc.) The same applies in the following description.

The asphalt compound layer 1 is for realizing a self-adhesive waterproof sheet having self-adhesive performance, and a material having self-adhesive and waterproof properties is used.

Illustratively, the asphalt compound layer 1 may include asphalt, exemplarily 15 to 45% by weight of asphalt, 5 to 10% by weight of blown asphalt, and a low-temperature / catalytically reacted tackifier 15 mainly composed of isoprene It may consist of a high-viscosity asphalt adhesive obtained by melting, mixing and dispersing about 25% by weight, 10 to 15% by weight of a thermoplastic elastomer, and 25 to 35% by weight of a filler at 180 to 210°C.

Components constituting the above asphalt compound layer 1 have been described as examples, and various components including asphalt may be replaced or added to the above components as long as they have waterproof properties.

The mesh network 4 is a network formed of glass fibers 4a. The glass fiber 4a is made into a thin and long fiber by melting glass. In general, the glass fiber 4a heats one end of a glass rod, pulls it, and winds it around a rotating drum to make it like a fiber.

These glass fibers are resistant to high temperatures, do not burn well, have no water absorption, and have little hygroscopicity. In addition, since it is chemically durable, it does not corrode, and in particular, it has strong strength and low elongation.

As described above, the mesh network 4 is manufactured in the form of a net by weaving glass fibers 4a. As described above, the mesh network 4 has excellent strength (eg, tensile strength) and low elongation.

As described above, since the asphalt compound layer 1 itself has adhesiveness, the mesh network 4 can be attached to the asphalt compound layer 1.

Although this sheet will be described in more detail in the description below, a reflective layer 2 may be provided on the asphalt compound layer 1, and a coating layer 3 to be described later may be provided on the reflective layer 2 (coating layer 3). ) and the reflective layer 2 can be mutually attached by a commonly used adhesive). Even if the reflective layer (2) and the coating layer (3) are provided on the upper part of the asphalt compound layer (1), when the sheet is installed on the roof of a building and many people step on it, it is stretched and deformed or damaged, so that the function of the sheet (waterproof) There is a problem that this long-term maintenance is not possible.

At this time, the sheet includes a mesh network 4 adhered to the asphalt compound layer 1, and the mesh network 4 includes glass fibers 4a having excellent strength and low elongation, so that the tensile strength of the sheet There is an advantage in that durability of the present sheet can be improved by improving strength and effectively suppressing elongation of the asphalt compound layer 1 in particular. Through this, the waterproof function of this sheet can be maintained for a longer period of time.

In addition, since the above-described glass fiber 4a has good heat and sound insulation properties, it is possible to reduce the cooling cost of a building by imparting heat insulation properties by the mesh network 4, and has an advantage of having excellent sound insulation properties.

Referring to FIGS. 1 and 2 , the mesh network 4 may be embedded and attached to the asphalt compound layer 1 .

Illustratively, when the asphalt compound layer 1 has good flowability in a high temperature state, the mesh network 4 may be inserted so as to be buried in the asphalt compound layer 1.

Through this, compared to when the mesh network 4 is attached to the surface (eg, the upper surface) of the asphalt compound layer 1, the mesh network 4 and the upper portion of the asphalt compound layer 1 in contact with the upper part and the mesh The lower portion of the asphalt compound layer 1 in contact with the lower portion of the net 4 is suppressed from being stretched, so that deformation of the present sheet can be more effectively suppressed.

As another example, the mesh network 4 may be attached to the upper surface of the asphalt compound layer 1, but as described above, the mesh network 4 is more preferably embedded in the asphalt compound layer 1.

Referring to FIGS. 1 and 2 , the sheet includes aluminum and may include a reflective layer 2 provided on the asphalt compound layer 1 .

For example, the reflective layer 2 is made of aluminum, and the aluminum may be in the form of a foil (aluminum foil).

When the aluminum foil is irradiated with visible light, the electrons of aluminum are immediately absorbed and emitted as photons after being excited above the Fermi level. Since the light absorption is usually within 0.1 micrometer, it is preferable that the thickness of the reflective layer 2 (length in the vertical direction relative to FIG. 1) is greater than 0.1 micrometer.

Aluminum emits light of the same wavelength after being absorbed by the metal. The light reflectance of the reflective layer 2 including aluminum may be illustratively about 90 to 95%, and the rest disappears as heat.

Gold and copper do not emit absorbed light at the same wavelength, but only emit light at a specific wavelength, whereas the reflective layer 2 including aluminum emits white light at almost the same wavelength and frequency as described above. It emits and has excellent reflective properties.

In this way, the present sheet includes the asphalt compound layer 1, is easy to install by self-attaching, and has waterproof performance. In addition, as described above, by including the reflective layer 2 containing aluminum, it reflects light to minimize heat absorption due to light absorption, thereby minimizing the temperature rise due to light absorption of the building to which this sheet is attached. there is.

That is, through this, there is an advantage that energy required for cooling can be minimized.

Referring to FIGS. 1 and 2 , this sheet may include a coating layer 3 provided on the reflective layer 2 .

In more detail, the coating layer 3 may include a first film layer 31 including the high density polyethylene (HDPE) and provided on the reflective layer 2 . The first film layer 31 may be made of the high-density polyethylene and a functional additive (G) to be described later.

High-density polyethylene is polyethylene having a density of 0.95 or higher with few branches and high crystallinity. Industrial production methods include a low-pressure method using an alkylaluminum-titanium halide as a catalyst (Ziegler method) and a medium-pressure method using a silica-alumina-chromia catalyst (Philips method). It is the counterpart of low-density polyethylene.

The high-density polyethylene described above is a non-toxic, eco-friendly plastic in which environmental hormones are not detected, and has excellent hardness, mechanical strength, heat resistance, and the like.

In addition, the coating layer 3 may include polyethylene terephthalate 32 (polyethylene terephthalate, PET, PET layer) provided on the first film layer 31 .

The above-described PET has a low water absorption rate, adds waterproofness to the base sheet 1, and has chemical resistance to acid. In addition, PET has high strength, high hardness, and excellent wear resistance.

In addition, the coating layer 3 is provided on top of the polyethylene terephthalate 32 and may include a second film layer 33 including high-density polyethylene. The second film layer 33 may be made of the high-density polyethylene described above.

The high-density polyethylene included in the second film layer 33 has a structure corresponding to that of the high-density polyethylene included in the first film layer 31, and is replaced with a more detailed description of the high-density polyethylene of the first film layer 31. do it with

In this way, the present sheet includes a coating layer 3 composed of a first film layer 31, polyethylene terephthalate 32, and a second film layer 33, thereby enhancing the waterproof function and at the same time relatively soft material The shape of the reflective layer 2 including the phosphorus asphalt compound layer 1 and the aluminum foil can be effectively maintained.

In particular, there is an advantage in that the polyethylene terephthalate 32 has excellent high strength, high hardness, and excellent abrasion resistance, so that damage to the sheet can be suppressed and warping of the sheet can be effectively suppressed.

In addition, it was said that each of the above-described first film layer 31 and second film layer 33 includes high-density polyethylene, and high-density polyethylene is matte unlike low-density polyethylene (LDPE), which is glossy, so that glare by the sheet can be further reduced. There is an advantage to being able to

Therefore, this sheet can further reduce the occurrence of glare, and has the advantage that it can be easily used in green parks, rooftops of buildings where smoking spaces, etc. are installed.

Meanwhile, referring to FIGS. 1 and 3 , the first film layer 31 includes 1.0 parts by weight of a functional additive (G) based on 100 parts by weight of high-density polyethylene.

The functional additive (G) contains 0.1 part by weight of a heat buffer (G2) containing hexadecane and polyester, compared to 0.2 part by weight of an inner covering material (G1) containing aluminum (or made of aluminum) 0.3 parts by weight of a sound absorbing material (G3) (or made of polyester), 0.2 parts by weight of an anionic polymer material (G4) containing p-styrenesulfonic acid (SSNa), spring steel (including or made of spring steel) 0.2 parts by weight of an elastic body (G5).

The endothelial material (G1) has a spherical shape surrounding the heat buffer material (G2), and the sound absorbing material (G3) surrounds the endothelial material (G1) but has an outer surface having a concave-convex shape in which hemispherical peaks and valleys are repeated, and the anionic The polymer material (G4) is provided in the valley of the sound absorbing material (G3), the sound absorbing material (G3) includes an insertion groove recessed inward from the floor so that the inner end of the elastic body (G5) is inserted, and the elastic body ( G5) has a coil shape and has an inner end inserted into the insertion groove so as to be provided on the outside of the sound absorbing material G3.

Here, the inner side means the center side of the unit (GU) described later of the functional additive (G), and the outer side means the radial direction from the center side.

Referring to FIG. 3, describing the functional additive (G) in more detail, the endothelial material (G1) has a spherical shape, is made of aluminum, and has an accommodation space in which an anionic polymer material (G4) to be described later is accommodated. is formed

It is preferable to include 0.2 parts by weight of the inner cover material (G1). If the inner cover material (G1) exceeds 0.2 parts by weight, the weight of the functional additive (G) is excessively increased to decrease dispersibility, and 0.2 parts by weight If it is less than that, there is a concern that the heat buffer G2 may be lost because the heat buffer G2 to be described later cannot be sufficiently covered.

The sound absorbing material (G3) is provided outside the endothelial material (G1) and includes polyester to absorb sound waves. As described above, the outer surface (surface) of the sound absorbing material G3 has a concavo-convex shape in which hemispherical peaks and valleys are repeated, and since it has a large contact area with sound waves, the sound absorption performance is further improved.

The sound absorbing material (G3) includes 0.3 parts by weight. If the amount of the sound absorbing material (G3) is less than 0.3 parts by weight, the sound absorption performance of the functional additive (G) is lowered, and if it exceeds 0.3 parts by weight, the weight of the functional additive (G) is excessively increased to increase the functional additives. The dispersibility of (G) may be reduced.

As described above, since the inner covering material G1 is provided inside the sound absorbing material G3, sound waves passing through the sound absorbing material G3 are reflected by the inner covering material G1, and thus the sound absorption material G3 It can be absorbed inside.

The heat buffer G2 is filled in the accommodation space formed inside the inner covering material G1, and may include hexadecane as described above.

Hexedecane (C16H34) is a Phase Change Material (PCM) with a melting point of about 18.2°C.

Phase change materials are energy storage materials that can actively store and release heat without external factors in the form of latent heat without temperature change when the phase changes according to the surrounding temperature.

In general, when a phase change occurs, latent heat, which is heat entering and leaving without a temperature change, has a significantly higher calorific value than sensible heat, which is heat entering and exiting with a temperature change without accompanying a phase change. Using this feature, it can be used to store a high amount of thermal energy or to maintain temperature.

In order to change the above melting point, the heat buffer (G2) includes undecane, dodecane, tridecane, tetradecane, pentadecane, and hexadecane in addition to hexedecane. At least one of hexadecane, heptadecane, octadecane, nonadecane, eicosane, and triacontane may be further included. The melting point of the thermal buffer material (G2) may be adjusted within the range of 15 to 25 ° C., which is room temperature.

The heat buffer G2 may serve to maintain the temperature of the inner covering material G1. Therefore, it is possible to suppress cracking caused by expansion of the heat buffer G2 at a high temperature or contraction at a low temperature.

Therefore, it is possible to maintain the sound absorbing performance of the functional additive (G) even when the temperature changes by suppressing the loss of the heat buffer (G2) due to cracking of the inner covering material (G1) and suppressing the decrease in sound and acoustic wave reflectivity.

In addition, the endothelial material (G1) and the sound absorbing material (G3) exchange with the heat buffer (G2), resulting in heat exchange with the high density polyethylene (GS) of the heat buffer (G2) and the first film layer (31). By doing so, it can play a role of suppressing cracks, damage, deformation, etc. caused by contraction and expansion of high-density polyethylene (GS) due to temperature change.

As described above, 0.1 part by weight of the thermal buffering material (G2) may be included. When less than 0.1 part by weight of the thermal buffering material (G2) is used, the inner covering material (G1) is heated to a specific temperature (eg, 15 to 25° C. or about 18.2° C.) ℃) cannot be effectively suppressed, and when the heat buffer G2 exceeds 0.1 part by weight, there is a problem that it cannot be accommodated in the accommodation space of the above-described endothelial material G1.

As described above, the anionic polymer material (G4) may include p-styrenesulfonic acid, and may further include a hydrogel pre-polymer.

The anionic polymer material (G4) may be a mixture of p-styrenesulfonic acid and a hydrogel pre-polymer (1:19 ratio) and UV curing.

The anionic polymer material G4 described above is provided on the outside of the sound absorbing material G3.

The anionic polymer material (G4) is preferably included in an amount of 0.2 parts by weight. If less than 0.2 parts by weight is used, the negative charge is not sufficient, and if it exceeds 0.2 parts by weight, the weight of the functional additive (G) is excessively increased to improve dispersibility. There is a problem with lowering it.

A plurality of units (GU) of the functional additive (G) may be included (mixed) in high-density polyethylene. In the process of application, a plurality of units (GU) are mutually pushed by an electrostatic repulsive force between the plurality of units (GU) in high-density polyethylene. ) can improve their dispersibility.

As described above, the anionic polymer material (G4) may be provided in the trough of the sound absorbing material (G3), through which collision between neighboring units (GU) or collision with other materials (impurities, etc.) of high-density polyethylene is suppressed. Thus, damage to the anionic polymer material (G4) can be suppressed.

The elastic body (G5) is provided on the outside (outer surface, surface) of the sound absorbing material (G3), and includes spring steel.

As described above, the sound absorbing material G3 includes an insertion groove recessed inward from the outer surface of the floor, and the inner end of the elastic body G3 is inserted into the insertion groove to be stably structurally fixed.

As described above, the elastic body G3 has a coil shape and is provided at the outer end of the floor of the sound absorbing material G3 to add elasticity to the unit body GU.

Therefore, in the process of agitating the first film layer 31 including the plurality of units GU, the damage of the units GU due to the collision of neighboring units GU is suppressed, and the coil-shaped elastic body G5 As is compressed and elastically restored, the dispersibility of the units GU in the first film layer 31 may be improved by allowing neighboring units GU to move away from each other. It is in a liquid or semi-solid state and can be cured after stirring or after being applied to polyethylene terephthalate (32)

The present invention described above with reference to the accompanying drawings can be variously modified and changed by those skilled in the art, and these modifications and changes should be construed as being included in the scope of the present invention.

Exposed waterproof sheet: S
Asphalt compound layer: 1 Reflective layer: 2
Coating layer: 3 First film layer: 31
Polyethylene terephthalate: 32 Second film layer: 33
Mesh net: 4 Fiberglass: 4a
Construction surface: 4a

Claims (4)

An asphalt compound layer attached to the construction surface; and
a mesh network formed of glass fibers and attached to the asphalt compound layer;
including,
The mesh network is embedded and attached to the asphalt compound layer,
Including aluminum, and further comprising a reflective layer provided on the asphalt compound layer,
A first film layer including high-density polyethylene (HDPE) and provided on top of the reflective layer, polyethylene terephthalate (PET) and high-density polyethylene (HDPE) provided on top of the first film layer and the polyethylene terephthalate Further comprising a coating layer including a second film layer provided on the top,
The coating layer is a translucent material,
The first film layer includes 1 part by weight of a functional additive (G) based on 100 parts by weight of the high-density polyethylene,
The functional additive (G) is,
0.1 part by weight of thermal buffer material (G2) containing hexadecane, 0.3 part by weight of sound absorbing material (G3) containing polyester, p-styrenesulfonic acid, compared to 0.2 part by weight of inner skin material (G1) containing aluminum 0.2 parts by weight of an anionic polymer material (G4) containing (p-styrenesulfonic acid, SSNa) and 0.2 parts by weight of an elastic body (G5) containing spring steel,
The endothelial material (G1) has a spherical shape surrounding the heat buffer material (G2), and the sound absorbing material (G3) surrounds the endothelial material (G1) but has an outer surface having a concave-convex shape in which hemispherical peaks and valleys are repeated, and the anionic The polymer material (G4) is provided in the valley of the sound absorbing material (G3), the sound absorbing material (G3) includes an insertion groove formed recessed inward from the floor so that the inner end of the elastic body (G5) is inserted, and the elastic body ( G5) is a coil shape and an exposed waterproof sheet, characterized in that the inner end is inserted into the insertion groove and provided outside the sound absorbing material (G3). delete delete delete

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