Multi-purpose Composite Waterproofing Sheet

Abstract

The present invention relates to a multi-purpose composite waterproof sheet, characterized by comprising: a non-woven fabric layer (10) exposed to the outside at the top layer; a PET film layer (20) formed on the bottom surface of the non-woven fabric layer (10); a foam layer (30) formed on the bottom surface of the PET film layer (20); a butyl layer (40) formed on the bottom surface of the foam layer (30); and a release layer (60) attached to the butyl layer (40) in a releaseable manner.

Description

Technology Field

[0001] The present invention relates to a multi-purpose composite waterproofing sheet, and more specifically, to a multi-purpose composite waterproofing sheet that enables easy installation regardless of humidity and temperature environments and possesses strong mechanical strength, thermal insulation, and weather resistance. Background Technology

[0002] Generally, since the roofs of buildings are always exposed to the environment, separate waterproofing methods are implemented to prevent water from seeping in due to rain or snow.

[0003] Among waterproofing methods, the waterproofing sheet method is a technique that forms a waterproof layer on a building roof by spreading out a waterproofing sheet of a specific size, made primarily from rubber, asphalt, or polyvinyl chloride resin, and attaching it with an adhesive. This waterproofing sheet method is one of the widely used waterproofing methods today because it has the advantages of being relatively simple to install and shortening the construction period.

[0004] The waterproofing sheets used in the above waterproofing sheet method are manufactured in advance at the factory in the form of rolls with a fixed width and length to facilitate on-site construction and handling, and are then spread out at regular intervals on the roof surface for installation.

[0005] At this time, in order to handle the connection between a waterproof sheet and another waterproof sheet, another waterproof sheet is overlapped by a certain width or more with the waterproof sheet installed on the building substrate, and various joining methods are applied depending on the material of the waterproof sheet to ensure that the overlap joint has watertightness.

[0006] For example, in the case of rubberized asphalt waterproofing sheets, a method of heat-fusion is adopted by heating and melting the overlapping parts using a heating device such as a torch, and in the case of synthetic resin or synthetic rubber waterproofing sheets, methods of bonding using adhesive or adhesive tape (EPDM sheets, PVC sheets, TPO sheets, etc.), welding using a solvent (PVC sheets), or hot-air welding using a hot-air welding machine are used.

[0007] However, when waterproofing is performed using the above method, a dead space occurs between the overlapping joints of the waterproofing sheet and another waterproofing sheet, making it difficult to ensure watertightness, and in particular, there was no way to verify whether the overlapping joints were properly constructed.

[0008] Furthermore, when joining the joints of waterproofing sheets using heat or solvents, the molten sheet develops shrinkage (stress) as it hardens, which increases the likelihood of long-term durability issues and depends on the skill level of the worker.

[0009] In addition, when external pressure or impact is continuously applied, damage occurs in specific areas, and when it rains or snows in this state, water can seep into the damaged areas and penetrate the roof surface. In this case, when the rain stops and the temperature rises, the water that has penetrated the roof surface evaporates to generate water vapor. This generated water vapor causes an air pocket phenomenon that lifts the waterproofing sheet from the roof surface, and the air pockets cause the entire surface of the waterproofing layer to become convex, leading to damage to the waterproofing layer even by weak impacts and drastically weakening the waterproofing capacity. The problem to be solved

[0010] The present invention was created to solve the above-mentioned problems and aims to provide a multi-purpose composite waterproof sheet that can maintain long-term durability by easily joining mutually overlapping parts and simultaneously connecting them firmly.

[0011] Another objective of the present invention is to provide a multi-purpose composite waterproof sheet that can prevent air pocket phenomena while remaining undamaged by externally applied pressure or impact by forming a composite waterproof layer with high mechanical strength, hardness, and wear resistance.

[0012] Another objective of the present invention is to provide a multi-purpose composite waterproofing sheet that can be installed without being affected by changes in temperature and humidity environments such as spring, summer, autumn, and winter, and can be used immediately after installation. means of solving the problem

[0013] To achieve the above objectives, the multi-purpose composite waterproof sheet according to the present invention comprises: a non-woven fabric layer (10) exposed to the outside at the top layer; a PET film layer (20) formed on the bottom surface of the non-woven fabric layer (10); a foam layer (30) formed on the bottom surface of the PET film layer (20); a butyl layer (40) formed on the bottom surface of the foam layer (30); and a release layer (60) attached to the butyl layer (40) in a releaseable manner.

[0014] In the present invention, the nonwoven fabric layer (10) further comprises a grid layer (11) made of HDPE (high-density polyethylene) and a friction layer (12) formed by dispersing fine silica particles on the upper surface.

[0015] In the present invention, the foam layer (30) is made of foamed EVA (Ethylene-Vinyl Acetate) resin.

[0016] In the present invention, the butyl layer (40) comprises butyl rubber (IIR: Isobutyllene Isoprene Rubber), polybutylene, petroleum resin, a softener (paraffin oil), an antioxidant, a UV stabilizer, a non-flammable filler composition, a flame retardant, ceramic powder, cellulose fibril granules, an antioxidant, and an antifungal agent.

[0017] In the present invention, the butyl layer (40) is implemented by mixing 100 parts by weight of butyl rubber, 80 to 160 parts by weight of polybutene, 80 to 160 parts by weight of petroleum resin, 60 to 100 parts by weight of softener, 3 to 7 parts by weight of antioxidant, 3 to 7 parts by weight of UV stabilizer, 80 to 160 parts by weight of non-flammable filler, 6 to 10 parts by weight of flame retardant, 2 to 10 parts by weight of ceramic powder, 1 to 3 parts by weight of cellulose fibril granules, 1 to 3 parts by weight of antioxidant, and 1 to 3 parts by weight of antifungal agent.

[0018] In the present invention, a reinforcing layer (50) for reinforcement is further included between the foam layer (30) and the butyl layer (40), and the reinforcing layer (50) is manufactured in a manner similar to a rice sack by forming HDPE (high-density polyethylene) into a tape shape and then weaving it by crossing it in the horizontal and vertical directions. Effects of the invention

[0019] The composite waterproof sheet (100) according to the present invention can be installed without being affected by temperature and humidity environments such as spring, summer, autumn, and winter, and due to the self-fusion properties of butyl rubber, the seams between the composite waterproof sheet and other waterproof composite sheets become bonded like a single plate over time, thereby enabling perfect waterproofing.

[0020] In addition, by having a non-woven fabric layer (10), a foam layer (30), and a butyl layer (40), noise and vibration are absorbed to reduce upper noise, and excellent thermal insulation and heat shielding effects are exhibited, so that the inside of the building can maintain an appropriate temperature even if the external temperature in summer or winter rises or falls excessively, thereby saving energy.

[0021] In addition, the composite waterproofing sheet (100) is resistant to acids and bases and has weather resistance that prevents discoloration or structural aging caused by ultraviolet rays, and does not chemically deteriorate over time, so it can maintain excellent mechanical properties such as impact resistance, crack resistance, and wear resistance, thereby increasing the durability of the constructed roof surface (R). Brief explanation of the drawing

[0022] FIG. 1 is a perspective view of a multi-purpose composite waterproof sheet according to the present invention. FIG. 2 is a drawing for explaining the composition by extracting the nonwoven fabric layer of FIG. 1, FIG. 3 is a drawing for explaining that butyl capsules are dispersed in the foam layer of FIG. 1. Specific details for implementing the invention

[0023] Hereinafter, a multi-purpose exposed composite waterproof sheet according to the present invention will be described in detail with reference to the attached drawings.

[0024] In the following, terms described as "upper" or "upper" may include not only those directly above in contact but also those above without contact. Terms such as "first," "second," etc., may be used to describe various components, but the components should not be limited by these terms. Terms are used solely for the purpose of distinguishing one component from another. A singular expression includes a plural expression unless the context clearly indicates otherwise. Furthermore, when a part is described as "comprising" a component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. Additionally, terms such as "...part," "module," etc., as used in the specification refer to a unit that performs at least one function or operation. Where an embodiment can be implemented differently, a specific process sequence may be performed differently from the order described. For example, two processes described consecutively may be performed substantially simultaneously or proceed in the reverse order of description.

[0025] FIG. 1 is a perspective view of a multi-purpose composite waterproof sheet according to the present invention, FIG. 2 is a drawing for explaining the composition of the non-woven fabric layer of FIG. 1, and FIG. 3 is a drawing for explaining that butyl capsules are dispersed in the foam layer of FIG. 1.

[0026] The multi-purpose composite waterproof sheet (100) according to the present invention is characterized by comprising: a non-woven fabric layer (10) exposed to the outside at the top layer; a PET film layer (20) formed on the bottom surface of the non-woven fabric layer (10); a foam layer (30) formed on the bottom surface of the PET film layer (20); a butyl layer (40) formed on the bottom surface of the foam layer (30); a reinforcing layer (50) formed between the foam layer (30) and the butyl layer (40) for reinforcement; and a release layer (60) attached to the butyl layer (40) in a releaseable manner.

[0027] The non-woven fabric layer (10) is made of polyester (PET) material and reinforces the composite waterproof sheet (100) and improves tensile strength, thereby acting as a frame to prevent it from tearing easily even under impact from the external environment and increasing durability. In addition, it prevents deformation by suppressing the composite waterproof sheet (100) from shrinking or expanding even with large temperature changes, and cushions cracks that occur on the building base surface to prevent the composite waterproof sheet (100) from bursting.

[0028] The nonwoven fabric layer (10) further includes a grid layer (11) made of HDPE (high-density polyethylene) as shown in FIG. 2, and a friction layer (12) implemented by dispersing fine silica particles on the upper surface.

[0029] The grid layer (11) is manufactured by molding an HDPE resin containing a UV stabilizer. Through this grid layer (11), the nonwoven fabric layer (10) maintains a composition that is safe against ultraviolet rays even when exposed to the outside, and is reinforced so that it is not easily damaged by external impact.

[0030] Additionally, the friction layer (12) further includes a friction layer (12) with increased roughness by dispersing and fixing fine silica particles on the upper surface of the nonwoven fabric layer (10). The friction layer (12) is implemented by spraying silica particles together with hot air at a temperature of 240 to 245°C, which is approximately 10°C lower than the melting temperature (250°C to 260°C) of PET on the upper surface of the nonwoven fabric layer (10), and in this process, the silica particles are fused and fixed to the upper surface of the nonwoven fabric layer (10) which melts instantly. This friction layer (12) prevents accidents where the installer slips on the sheet even in rainy or humid weather.

[0031] The PET film layer (20) is formed on the bottom surface of the nonwoven fabric layer (10) and acts as a frame, reinforcing the composite waterproof sheet (100) so that it is not damaged by external impacts applied through the nonwoven fabric layer (10), and providing high tensile strength so that the composite waterproof sheet (100) is not torn by most physical stimuli.

[0032] Meanwhile, an aluminum deposition layer (21) is formed in the direction of the nonwoven fabric layer (10) on the PET film layer (20). The aluminum deposition layer (21) reflects sunlight that partially transmits through the nonwoven fabric layer (10) and minimizes the conduction of heat from sunlight to the foam layer (30).

[0033] The foam layer (30) is a foam in which fine closed-cells are formed inside the foam, and it acts as an insulating material that blocks heat transfer, significantly lowers the water absorption rate, and strengthens the moisture blocking function to alleviate condensation on the building base surface caused by temperature differences. In addition, due to its unique cushioning function, it absorbs external shocks applied from above and protects the butyl layer (40) and the building base surface from physical shocks that occur, especially during construction or maintenance. Furthermore, it is much more flexible than a general sheet, so even if rough irregularities or cracks occur on the building base surface, the composite waterproofing sheet (100) does not get damaged and maintains its shape.

[0034] The foam layer (30) is made of foamed EVA (Ethylene-Vinyl Acetate) resin. When the foam layer (30) is made of EVA, it has properties similar to rubber, so it has excellent shock absorption and good resilience to return to its original state, so it has high durability and does not harden even at low temperatures and maintains flexibility. In addition, it is resistant to ultraviolet rays (UV) so it does not easily crack or discolor when exposed to sunlight, and it has good resistance to seawater, oil, and acidic components so it withstands harsh environments well.

[0035] Meanwhile, as shown in FIG. 3, a plurality of butyl capsules (31) filled with liquid butyl are dispersed and embedded in the foam layer (30). Even if the sheet is punctured by a nail or damaged by a sharp object while installing the composite waterproof sheet (100), the capsules burst and immediately fill the gaps, thereby preventing leakage at the source.

[0036] The butyl layer (40) comprises butyl rubber (IIR: Isobutyllene Isoprene Rubber), polybutylene, petroleum resin, a softener (paraffin oil), an antioxidant, a UV stabilizer, a non-flammable filler composition, a flame retardant, ceramic powder, cellulose fibril granules, an antioxidant, and an antifungal agent.

[0037] This butyl layer (40) is composed of 100 parts by weight of butyl rubber, 80 to 160 parts by weight of polybutene, preferably 120 parts by weight, 80 to 160 parts by weight of petroleum resin, preferably 120 parts by weight, 60 to 100 parts by weight of a softener, preferably 80 parts by weight, 3 to 7 parts by weight of an antioxidant, preferably 5 parts by weight, and 3 to 7 parts by weight of a UV stabilizer, preferably 5 parts by weight, 80 to 160 parts by weight of a non-flammable filler, preferably 120 parts by weight, 2 to 10 parts by weight of a flame retardant, preferably 6 parts by weight, 6 to 10 parts by weight of ceramic powder, preferably 8 parts by weight, 1 to 3 parts by weight of cellulose fibril granules, preferably 2 parts by weight, and 1 to 3 parts by weight of an antioxidant, preferably 2 parts by weight, and 1 to 3 parts by weight of an antifungal agent.

[0038] Butyl rubber is produced by copolymerizing a small amount of isoprene with isobutylene; as an inert rubber with a long-chain structure, it maintains airtightness and water resistance as a basic elastomer.

[0039] Polybutene is a very sticky transparent liquid that acts as a softener to loosen the stiffness of the butyl layer (40), while also adding a moist stickiness that does not dry out.

[0040] The petroleum resin strengthens the initial adhesion and retention of the butyl layer (40). The softener provides flexibility to the butyl layer (40) and improves low-temperature workability. The antioxidant and UV stabilizer enable the prevention of deterioration and long-term durability of the butyl layer.

[0041] The non-flammable filler, which controls the viscosity of the butyl layer (40) and reinforces the tensile strength, comprises silicon dioxide, calcium carbonate, aluminum hydroxide, and carbon black. This non-flammable filler composition is composed of 100 parts by weight of silicon dioxide, 150 to 250 parts by weight of calcium carbonate, 110 to 210 parts by weight of aluminum hydroxide, and 60 to 140 parts by weight of carbon black.

[0042] Flame retardants suppress the combustion of the butyl layer in the event of a fire, while simultaneously preventing or minimizing the generation of toxic gases even when exposed to flames.

[0043] The ceramic powder is combined with a flame retardant to increase the flame retardancy of the butyl layer (40), and is implemented by mixing alkali silicate powder, potassium silicate, and sodium silicate in a composition ratio of 1:1:1. When the composite waterproofing sheet (100) is installed on a sloping roof surface, this ceramic powder imparts thixotropy that prevents the butyl layer (40) from melting and flowing down even if the roof surface is heated during the summer.

[0044] Cellulose fibril granules are obtained by mechanically processing pulp from wood or non-wood materials to obtain pulp powder, extracting cellulose aggregates from the pulp powder, and then mechanically crushing and sieving the lump-shaped cellulose aggregates to obtain particles with a size of 30 to 100 μm. Cellulose fibril granules have very high mechanical strength and a tensile modulus of elasticity of 100 to 160 GPa, which is similar to that of steel or Kevlar, so they can increase the tensile strength of the butyl layer (40), and because they are hydrophilic, they absorb fine moisture that may occur on the building substrate.

[0045] The antifungal agent prevents mold from growing on the butyl layer (40) due to various humidity causes in the surrounding environment, even after a long period of time.

[0046] With the above-described composition and composition ratio, the self-fusion properties are highlighted, and as time passes, the seams between the composite waterproofing sheet (100) and other composite waterproofing sheets become bonded together like a single plate. Even if damaged, a self-healing effect can be expected, and the structure maintains its shape without breaking even with minute movements or cracks.

[0047] The reinforcing layer (50) is formed between the foam layer (30) and the butyl layer (40) to prevent the composite waterproofing sheet (100) of the present invention from being damaged when it is severely bent for installation on building corners or severely sloped parts. To this end, the reinforcing layer (50) is manufactured in a manner similar to a rice sack by forming HDPE (high-density polyethylene) into a tape shape and then weaving it by crossing it in the horizontal and vertical directions.

[0048] In this way, the composite waterproof sheet (100) according to the present invention can be installed without being affected by temperature and humidity environments such as spring, summer, autumn, and winter, and due to the self-fusion properties of butyl rubber, the seams between the composite waterproof sheet and other waterproof composite sheets become bonded like a single plate over time, thereby enabling perfect waterproofing.

[0049] In addition, by having a non-woven fabric layer (10), a foam layer (30), and a butyl layer (40), noise and vibration are absorbed to reduce upper noise, and excellent thermal insulation and heat shielding effects are exhibited, so that the inside of the building can maintain an appropriate temperature even if the external temperature in summer or winter rises or falls excessively, thereby saving energy.

[0050] In addition, the composite waterproofing sheet (100) is resistant to acids and bases and has weather resistance that prevents discoloration or structural aging caused by ultraviolet rays, and does not chemically deteriorate over time, so it can maintain excellent mechanical properties such as impact resistance, crack resistance, and wear resistance, thereby increasing the durability of the constructed roof surface (R). Explanation of the symbols

[0051] 10 ... non-woven fabric layer 11 ... grid layer 12 ... friction layer 20 ... PET film layer 21 ... aluminum deposition layer 30 ... foam layer 31 ... butyl capsule layer 40 ... butyl layer 50 ... reinforcement layer 60 ... irregular layer

Claims

Claim 1 A multi-purpose composite waterproof sheet comprising: a non-woven fabric layer (10) exposed to the outside from the top layer; a PET film layer (20) formed on the bottom surface of the non-woven fabric layer (10); a foam layer (30) formed on the bottom surface of the PET film layer (20); a butyl layer (40) formed on the bottom surface of the foam layer (30); and a release layer (60) attached to the butyl layer (40) in a releaseable manner, wherein the foam layer (30) is made of foamed EVA (Ethylene-Vinyl Acetate) resin. Claim 2 A multi-purpose composite waterproof sheet according to claim 1, wherein the non-woven fabric layer (10) further comprises a grid layer (11) made of HDPE (high-density polyethylene) and a friction layer (12) formed by dispersing fine silica particles on the upper surface. Claim 3 delete Claim 4 A multi-purpose composite waterproof sheet according to claim 1, wherein the butyl layer (40) comprises butyl rubber (IIR: Isobutyllene Isoprene Rubber), polybutylene, petroleum resin, a softener (paraffin oil), an antioxidant, a UV stabilizer, a non-flammable filler composition, a flame retardant, ceramic powder, cellulose fibril granules, an antioxidant, and an antifungal agent. Claim 5 A multi-purpose composite waterproof sheet according to claim 4, wherein the butyl layer (40) is implemented by mixing 100 parts by weight of butyl rubber, 80 to 160 parts by weight of polybutene, 80 to 160 parts by weight of petroleum resin, 60 to 100 parts by weight of softener, 3 to 7 parts by weight of antioxidant, 3 to 7 parts by weight of UV stabilizer, 80 to 160 parts by weight of non-flammable filler, 6 to 10 parts by weight of flame retardant, 2 to 10 parts by weight of ceramic powder, 1 to 3 parts by weight of cellulose fibril granules, 1 to 3 parts by weight of antioxidant, and 1 to 3 parts by weight of antifungal agent. Claim 6 A multi-purpose composite waterproof sheet according to claim 1, further comprising a reinforcing layer (50) formed between the foam layer (30) and the butyl layer (40) for reinforcement, wherein the reinforcing layer (50) is manufactured in a manner similar to a rice sack by forming HDPE (high-density polyethylene) into a tape shape and then weaving it in a cross-sectional and longitudinal direction.

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