Thermoplastic sealing device with improved barrier properties

Abstract

The present invention relates to a sealing device (1) comprising a polymer waterproof layer (2) and a barrier composite layer (3), said barrier composite layer (3) comprising a polymer bonding layer (4), a metal or polymer barrier layer (5), and a polymer protective layer (6). The invention also relates to a method of manufacturing the sealing device and to a roofing system comprising a roofing mat (10) and a sealing device (1) adhered to the surface of the roofing mat (10).

Description

Technical Field

[0001] This invention relates to the field of waterproofing above-ground and underground building structures using impermeable thermoplastic sealing devices. In particular, this invention relates to thermoplastic waterproofing and roofing membranes used to seal building substrates to prevent leaks. Background Technology

[0002] In the construction industry, polymer sheets, commonly referred to as membranes, are used to protect underground and above-ground structures (such as basements, tunnels, and flat and low-sloping roofs) from seepage water. For example, membranes are applied to prevent water from entering through cracks in concrete structures caused by building settlement, load shifting, or concrete shrinkage. Waterproofing roofing membranes for flat and low-sloping roof structures can be provided as single-layer or multi-layer membrane systems. In a single-layer system, the roof substrate is covered with a roofing membrane consisting of a single waterproof layer, which can be reinforced with reinforcing layers such as fiber materials. In a multi-layer system, a roofing membrane consisting of multiple waterproof layers of different or similar materials is used. Compared to multi-layer membranes, single-layer membranes have the advantage of lower production costs, but they are also less resistant to mechanical damage caused by perforation by sharp objects.

[0003] Common materials used for waterproofing and roofing membranes include plastics, particularly thermoplastics such as plasticized polyvinyl chloride (p-PVC), thermoplastic olefins (TPE-O, TPO), and elastomers such as ethylene-propylene diene monomer (EPDM) rubber. Bituminous materials are also used to provide membranes because they offer good resistance to environmental factors and relatively low cost compared to thermoplastic polymers. Bituminous compositions are typically modified with synthetic polymers to increase UV resistance, toughness, and flexibility at low temperatures. The membranes are usually delivered to the construction site in rolls or unrolled and cut into suitable sheets for bonding to the surface of the substrate to be waterproofed. Depending on the installation location, the substrate on which the membrane is adhered can consist of a variety of materials. The substrate can be, for example, concrete, metal, or wood panels, or it can include cover plates and / or insulation panels and / or existing waterproofing or roofing membranes.

[0004] Waterproofing and roofing membranes can be adhered to substrates using several techniques, such as contact bonding or the use of self-adhesive films. In contact bonding, the surfaces of the membrane and the substrate are first coated with a solvent- or water-based contact adhesive, and then the adhesive films are bonded together. The volatile components of the contact adhesive are “flash-evaporated” to provide a partially dried adhesive film before the membrane comes into contact with the substrate surface. The main disadvantages of contact bonding involve a slower installation process compared to self-adhesive films, significant emissions of volatile compounds in the case of solvent-based adhesives, and limited application at low temperatures in the case of water-based contact adhesives.

[0005] Self-adhesive films comprise a pre-applied layer of adhesive composition coated on the film surface. Typically, the pre-applied adhesive layer is also covered with a release film to prevent premature unwanted adhesion and protect the adhesive layer from moisture, dirt, and other environmental factors. In use, the release film is removed, and the film is secured to the substrate without the use of additional adhesive. Self-adhesive films with a pre-applied adhesive layer covered by a release film are also known as "peel-and-adhesion films."

[0006] In some cases, chemical migration from the adhesive layer into the membrane can be a significant problem, especially for TPO-based roofing films. For example, in contact bonding cases, solvent-based adhesives are applied directly to the backing layer of the film, and volatile compounds can migrate from the adhesive composition into the polymer matrix of the film, leading to a shortened lifespan. The nonwoven layer of a fleece / felt backing can serve as a barrier against compound migration in roofing films, but its protective capability is only partial due to the porous structure of the nonwoven fabric. Another disadvantage of fleece and felt backing films compared to bare backing films is their higher production cost. Self-adhesive films contain a factory-applied adhesive layer on the lower surface of the film. This adhesive layer can be butyl rubber-based or asphalt-based, and may contain various chemical compounds that can migrate from the adhesive layer into the film. Accelerated aging tests using a QUVB tester have shown that the adhesive layer of some commercially available TPO-based self-adhesive films contains components that will migrate into the film, thus increasing the rate of aging.

[0007] Therefore, there is still a need for novel TPO-based membranes with improved barrier properties to prevent the migration of chemicals from the environment into the membrane material. Invention Overview

[0009] The object of the present invention is to provide a sealing device with improved barrier properties against the migration of chemical compounds, which is suitable for waterproofing substrates to resist water penetration.

[0010] The subject of this invention is the sealing device as defined in claim 1.

[0011] Surprisingly, it has been found that sealing devices comprising a polymer waterproofing layer and a barrier composite layer can solve or at least mitigate problems associated with prior art sealing devices used for waterproofing substrates, wherein the barrier composite layer comprises a polymer bonding layer, a barrier layer, and a polymer protective layer, wherein the barrier composite layer covers the bottom surface of the polymer waterproofing layer.

[0012] One advantage of the sealing device of the present invention is that it can achieve improved resistance to chemical compound migration, particularly compared to prior art waterproofing and roofing membranes, without significantly increasing the production and raw material costs of the sealing device. Another advantage of the present invention is that the sealing device can be manufactured by thermally laminating the components together instead of using adhesives, which enables a simplified production process and improves production efficiency.

[0013] Other aspects of the invention are set forth in the other independent claims. Preferred aspects of the invention are set forth in the dependent claims.

[0014] Brief description of the attached figures

[0015] Figure 1 A cross-section of a sealing device (1) comprising a polymer waterproof layer (2) and a barrier composite layer (3) covering the lower main surface of the polymer waterproof layer is shown. The barrier composite layer comprises a polymer bonding layer (4), a barrier layer (5) and a polymer protective layer (6), wherein the polymer bonding layer (4) is disposed between the polymer waterproof layer (2) and the barrier layer (5).

[0016] Figure 2 It shows Figure 1 The cross-section of the sealing device (1) further includes a connecting layer (7) disposed between the barrier layer (5) and the polymer connecting layer (4).

[0017] Figure 3 It shows Figure 1 The cross-section of the sealing device (1) further includes a fiber material layer (8) fully embedded in the polymer waterproof layer (2) and an adhesive layer (9) covering the lower main surface of the polymer protective layer (6).

[0018] Figure 4 A cross-section of a roofing system is shown, which includes a roofing pad (10) and a surface adhered to the roofing pad (10) via an adhesive layer (9). Figure 1 The sealing device (1).

[0019] exist Figures 1 to 4 The thickness ratio of each layer is not a true ratio. In particular, the ratio of the thickness of the polymer waterproof layer (2) to the thickness of each layer of the barrier composite layer (3) is actually much higher than the stated ratio. Figure 1-4 The ratio shown. Invention Details

[0021] The subject of this invention is a sealing device (1) comprising:

[0022] i. A polymer waterproof layer (2), comprising at least one polymer P1 and having an upper main surface and a lower main surface,

[0023] ii. A barrier composite layer (3), said barrier composite layer covering at least a portion of the lower main surface of the polymer waterproof layer, wherein said barrier composite layer comprises:

[0024] a) A polymer linker layer (4) comprising at least one polymer P2,

[0025] b) Barrier layer (5), and

[0026] c) Polymer protective layer (6), wherein

[0027] The polymer bonding layer (4) is disposed between the polymer waterproof layer (2) and the barrier layer (5), wherein the barrier layer (5) is a metal barrier layer or a polymer barrier layer comprising at least one polymer P3 selected from ethylene-vinyl alcohol and polyamide, and the polymer protective layer (6) comprises at least one polymer P4 selected from polyester, polyamide and polycarbonate.

[0028] Substances whose names begin with "poly" are substances that, in form, contain two or more functional groups per molecule that appear in their name. For example, polyols are compounds having at least two hydroxyl groups. Polyethers are compounds having at least two ether groups.

[0029] The term "polymer" refers to a collection of chemically homogeneous macromolecules produced by polymerization reactions (addition polymerization, addition polymerization, condensation polymerization), wherein the macromolecules differ in their degree of polymerization, molecular weight, and chain length. The term also includes derivatives of the collection of said macromolecules produced by polymerization reactions, i.e., compounds obtained by reactions such as addition or substitution of functional groups in a predetermined macromolecule, which may be chemically homogeneous or chemically heterogeneous.

[0030] The term "melting temperature" refers to the temperature at which a material undergoes a transition from a solid to a liquid state. Melting temperature (T0) m The measurement is preferably performed by differential scanning calorimetry (DSC) according to ISO 11357-3 using a heating rate of 2 °C / min. Measurements can be performed using a Mettler Toledo DSC 3+ apparatus, and T... m The value can be determined from the measured DSC curve using DSC software. When the measured DSC curve shows several peak temperatures, the first peak temperature from the lower temperature side of the thermogram is taken as the melting temperature (T). m ).

[0031] The term "glass transition temperature" (T) gThe glass transition temperature (G) represents the temperature above which the polymer component becomes soft and flexible, and below which it becomes hard and glassy. The glass transition temperature is preferably determined by dynamic mechanical analysis (DMA), using an applied frequency of 1 Hz and a strain level of 0.1% as the peak value of the measured loss modulus (G”) curve.

[0032] The "amount or content of at least one component X" in the composition, such as "amount of at least one polymer P1," refers to the sum of the individual amounts of all polymers P1 contained in the composition. Furthermore, if the composition contains 20% by weight of at least one polymer P1, the sum of the amounts of all polymers P1 contained in the composition equals 20% by weight.

[0033] The term "room temperature" refers to a temperature of 23°C.

[0034] The sealing device of the present invention comprises a polymer waterproof layer and a barrier composite layer, the barrier composite layer comprising a polymer bonding layer, a barrier layer, and a polymer protective layer. The term "layer" in this disclosure refers to a sheet-like element having an upper main surface and a lower main surface, a width defined between longitudinally extending edges, and a thickness defined between the upper and lower main surfaces. Preferably, the layer has a length and width greater than the thickness of the layer by at least 5 times, more preferably at least 15 times, and even more preferably at least 25 times. The term "polymer layer" refers to a layer comprising a continuous phase composed of one or more polymers.

[0035] Preferably, the barrier composite layer covers at least 50% of the lower main surface area of ​​the polymer waterproof membrane, more preferably at least 65%, even more preferably at least 75%, and still more preferably at least 85% by weight. Preferably, the barrier composite layer is absent from narrow sections (also known as selvedges) near the longitudinal edge of the lower main surface of the polymer waterproof membrane. These selvedges, with a width of 25-150 mm, preferably 35-100 mm, can exist on the surface of the polymer waterproof membrane to allow for overlapping portions to be sealed by thermal welding and adhesive bonding.

[0036] Preferably, both the polymer waterproofing layer and the polymer bonding layer are polyolefin-based layers. The term "polyolefin" in this disclosure refers to homopolymers and copolymers obtained by polymerizing olefins optionally with other types of comonomers.

[0037] According to one or more embodiments, at least one polymer P1 and P2 are selected from ethylene copolymers, polyethylene, propylene copolymers and polypropylene.

[0038] Suitable polyethylenes for use as at least one polymer P1 and P2 include very low-density polyethylene, low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, high-density polyethylene and ultra-high molecular weight polyethylene, especially low-density polyethylene, linear low-density polyethylene, medium-density polyethylene and high-density polyethylene.

[0039] Suitable ethylene copolymers include ethylene and one or more C3-C 20 α-olefin monomers, particularly one or more of propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-decene, 1-dodecene and 1-hexadecene, in random and block copolymers, preferably comprising at least 60% by weight, more preferably at least 65% by weight, of ethylene-derived units, based on the weight of the copolymer.

[0040] Suitable ethylene random copolymers include, for example, ethylene-based plastomers, which may be marketed, for example, under trade names. Obtained through commercial purchase, such as EG 8100G, EG 8200G, SL8110G, KC 8852G, VP 8770G and PF 1140G (all from Dow Chemical Company); by product name Purchased commercially, such as Exact Exact Exact 3131、 4049、 4053 5371 and 8203 (all from Exxon Mobil); and by product name Commercially available (from Borealis AG) and ethylene-based polyolefin elastomers (POEs), which may be marketed, for example, under the trade name Engage. Acquired through commercial purchase, such as Engage Engage Engage 8003 8100 8480 8540, Engage 8440 8450 8452, 8200 and Engage (All from Dow Chemical Company)

[0041] Suitable ethylene-α-olefin block copolymers include ethylene-based olefin block copolymers (OBCs), which may be marketed, for example, by trade name Obtained through commercial purchase, such as 9100 9107 9500 9507 and 9530 (all from Dow Chemical Company).

[0042] Other suitable ethylene copolymers include copolymers of ethylene and vinyl acetate. Suitable ethylene and vinyl acetate copolymers include those containing 4-90% by weight, preferably 6-80% by weight, and more preferably 8-70% by weight, based on the weight of the copolymer. Suitable ethylene and vinyl acetate copolymers are commercially available, for example under trade names. (From Exxon Mobil), by product name (From Repsol Quimica SA), by product name (from Arkema Functional Polyolefins), under trade name (From Eni Versalis SpA.) and by product name (Originated from Arlanxeo GmbH)

[0043] Suitable polypropylenes include, for example, isotactic polypropylene (iPP), syndiotactic polypropylene (sPP), and homopolymer polypropylene (hPP).

[0044] Suitable propylene copolymers include propylene-ethylene random and block copolymers, as well as propylene copolymers with one or more C4-C copolymers. 20 α-olefin monomers, particularly one or more random and block copolymers of 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-decene, 1-dodecene and 1-hexadecene, preferably comprising at least 60 wt%, more preferably at least 65 wt%, based on the weight of the copolymer.

[0045] Suitable propylene random and block copolymers can be, for example, marketed under trade names. And Versify (from Dow Chemical Company) and by product name (Originally purchased from Exxon Mobil)

[0046] Other suitable propylene copolymers include multiphase propylene copolymers. These are multiphase polymer systems comprising a highly crystalline base polyolefin and a low-crystallinity or amorphous polyolefin modifier. The multiphase morphology consists of a matrix phase primarily composed of the base polyolefin and a dispersed phase primarily composed of the polyolefin modifier. Suitable commercially available multiphase propylene copolymers include reactor blends of the base polyolefin and the polyolefin modifier, also known as “in-situ TPO” or “reactor TPO” or “impact copolymer (ICP)”. These are typically prepared by sequential polymerization, wherein the matrix phase component is prepared in a first reactor and transferred to a second reactor, in which the dispersed phase component is prepared and incorporated as a domain into the matrix phase. Multiphase propylene copolymers comprising polypropylene homopolymer as the base polymer are generally referred to as “multiphase propylene copolymers (HECO)”, while multiphase propylene copolymers comprising polypropylene random copolymer as the base polymer are generally referred to as “multiphase propylene random copolymers (RAHECO)”. The term “multiphase propylene copolymer” in this disclosure includes multiphase propylene copolymers of the HECO and RAHECO types.

[0047] Suitable multiphase propylene copolymers include reactor-produced TPO and soft TPO produced using LyondellBasell's Catalloy process technology, which can be marketed under various trade names. and Obtained through commercial purchase, such as CA 10A CA 12A and CA 60A and Hifax CA 212A. Other suitable multiphase propylene copolymers are available by trade name. (Originated commercially from Borealis Polymers, for example) SD233CF.

[0048] Preferably, at least one polymer P1 accounts for at least 25% by weight of the total weight of the polymer waterproof layer, more preferably at least 35% by weight, more preferably at least 45% by weight, and even more preferably at least 55% by weight.

[0049] According to one or more embodiments, the polymer waterproofing layer also contains at least one flame retardant FR.

[0050] At least one flame retardant FR is preferably selected from magnesium hydroxide, aluminum trihydride, antimony trioxide, ammonium polyphosphate, and melamine-, melamine resin-, melamine derivative-, melamine-formaldehyde-, silane-, siloxane-, and polystyrene-coated ammonium polyphosphate.

[0051] Other suitable flame retardants used as at least one flame retardant FR include, for example, 1,3,5-triazine compounds, such as melamine, meliamine, melon, cyanuramide, cyanuramide, 2-ureidomelamine, acetylguanidine, benzoguanidine, diaminophenyltriazine, melamine salts and adducts, melamine cyanurate, melamine borate, melamine orthophosphate, melamine pyrophosphate, bismelamine pyrophosphate and melamine polyphosphate, oligomeric and polymeric 1,3,5-triazine compounds and polyphosphates of 1,3,5-triazine compounds, guanine, piperazine phosphate, piperazine polyphosphate, ethylenediamine phosphate, pentaerythritol, borophosphate, 1,3,5-trihydroxyethyl isocyanurate, 1,3,5-triglycidyl isocyanurate, triallyl isocyanurate and derivatives of the above compounds.

[0052] Suitable flame retardants can be, for example, by trade name and (All from Albemarle) and by product name (from Clariant) (from Phos-Check) and FR (Originated from Budenheim) Purchased commercially.

[0053] According to one or more embodiments, the at least one flame retardant FR accounts for 2.5-60% by weight of the total weight of the polymer waterproof layer, preferably 5-55% by weight, more preferably 10-50% by weight.

[0054] In addition to at least one polymer P1 and at least one flame retardant FR, the polymer waterproofing layer may also contain auxiliary components such as UV and heat stabilizers, antioxidants, plasticizers, fillers, dyes, pigments such as titanium dioxide and carbon black, matting agents, antistatic agents, impact modifiers, biocides, and processing aids such as lubricants, slip agents, anti-blocking agents, and denestaids. Based on the total weight of the polymer waterproofing layer, the total amount of these auxiliary components preferably does not exceed 55% by weight, more preferably not more than 45% by weight, and even more preferably not more than 35% by weight.

[0055] The thickness of the polymer waterproofing layer is preferably no more than 5 mm, more preferably no more than 3.5 mm, and even more preferably no more than 3 mm. According to one or more embodiments, the thickness of the polymer waterproofing layer is 0.25-5 mm, preferably 0.5-3.5 mm, more preferably 0.75-3 mm, even more preferably 0.85-2.5 mm, and still more preferably 1-2.5 μm. The thickness of the polymer layer of the sealing device can be determined using the measurement method defined in DIN EN 1849-2.

[0056] There are no strict limitations on the width and length of the polymer waterproofing layer, and these depend on the intended use of the sealing device. The terms "width" and "length" refer to two vertical dimensions measured in the horizontal plane of the first and second primary surfaces of the sheet element. Typically, the "width" of the sheet element is smaller than its horizontal dimension. Therefore, the "width" of the polymer waterproofing layer refers to the secondary dimension measured in the horizontal plane of the polymer waterproofing layer in a direction perpendicular to its length.

[0057] For example, the sealing device can be provided in the form of a narrow strip, wherein the width of the polymer waterproof layer is, for example, in the range of 10-500 mm, such as 50-350 mm, particularly 75-250 mm. The sealing device can also be provided in the form of a wide sheet, wherein the width of the polymer waterproof layer is, for example, in the range of 0.75-5 m, such as 1-3.5 m, particularly 1-2.5 m.

[0058] The sealing device of the present invention is typically provided in the form of a prefabricated product, which is delivered to the construction site in roll form, and then the roll is unrolled and cut to provide a sheet-like product with a length several times its width.

[0059] According to one or more embodiments, the sealing device is a waterproof or roofing membrane, preferably a roofing membrane, wherein the width of the polymer waterproof layer is in the range of 0.5-5m, more preferably 0.75-3.5m, even more preferably 1-3m, and still more preferably 1.5-2.5m.

[0060] Preferably, at least one polymer P2 accounts for at least 35% by weight of the total weight of the polymer binder layer, more preferably at least 50% by weight, more preferably at least 65% by weight, even more preferably at least 75% by weight, and still more preferably at least 85% by weight. According to one or more embodiments, at least one polymer P2 accounts for 50-95% by weight of the total weight of the polymer binder layer, preferably 65-95% by weight, more preferably 75-95% by weight.

[0061] At least one polymer, P1 and P2, are preferably compatible with each other.

[0062] The term "compatible" should be understood to mean that the properties of a blend composed of at least one polymer, P1, and P2, are not inferior to those of the individual polymer components. Preferably, at least one polymer, P1, and P2 are at least partially miscible with each other. The term "miscible" should be understood to mean that a polymer blend composed of at least one polymer, P1, and P2, has a negative Gibbs free energy and heat of mixing. Polymer blends composed of completely miscible polymers tend to have a single glass transition point, which can be measured using dynamic mechanical thermodynamic analysis (DMTA). The glass transition point can be determined, for example, as the peak of a measured tanδ curve (the ratio of storage modulus to loss modulus).

[0063] According to one or more embodiments, the at least one polymer P1 comprises at least 25% by weight, preferably at least 50% by weight, more preferably at least 75% by weight, of at least one ethylene-based polymer P11 based on the total weight of the at least one polymer P1, and the at least one polymer P2 comprises at least 25% by weight, preferably at least 50% by weight, more preferably at least 75% by weight, of at least one ethylene-based polymer P21 based on the total weight of the at least one polymer P2. Generally, the expression "at least one component X comprises at least one component XN", such as "at least one polymer P1 comprises at least one ethylene-based polymer P11", should be understood to mean that, in the context of this disclosure, the corresponding layer comprises one or more ethylene-based polymers P11 as representatives of at least one polymer P1.

[0064] According to one or more other embodiments, at least one polymer P1 comprises at least 25% by weight, preferably at least 50% by weight, more preferably at least 75% by weight of at least one propylene-based polymer P12 based on the total weight of at least one polymer P1, and at least one polymer P2 comprises at least 25% by weight, preferably at least 50% by weight, more preferably at least 75% by weight of at least one propylene-based polymer P22 based on the total weight of at least one polymer P2.

[0065] The terms “ethylene-based polymer” and “propylene-based polymer” in this disclosure refer to polymers that respectively contain more than 50% by weight, preferably more than 55% by weight, of ethylene or propylene-derived units.

[0066] The thickness of the polymer bonding layer is preferably no greater than 500 μm, more preferably no greater than 400 μm, and even more preferably no greater than 300 μm. According to one or more embodiments, the thickness of the polymer bonding layer is in the range of 5-450 μm, preferably 15-350 μm, more preferably 25-300 μm, even more preferably 35-250 μm, and still more preferably 50-200 μm.

[0067] According to one or more embodiments, at least a portion of the lower main surface of the polymer waterproofing layer is directly connected to the surface of the polymer bonding layer.

[0068] In the context of this disclosure, the term "direct connection" should be understood to mean that there is no other layer or material between the two layers, and that the opposing surfaces of the two layers are directly bonded or adhered to each other. In the transition region between the two layers, the materials forming the layers may also be mixed together.

[0069] According to one or more embodiments, a polymer bonding layer is thermally laminated to at least a portion of the lower main surface of the polymer waterproofing layer in a manner that provides a direct bond between the polymer bonding layer and the polymer waterproofing layer. The terms "thermal lamination" or "thermal bonding" in this disclosure refer to a method of bonding individual layers together by applying heat and pressure without the use of adhesives, such that the layers remain adhered to each other when the pressure is removed.

[0070] The barrier composite layer also includes a barrier layer, which may be a metal barrier layer or a polymer barrier layer containing at least one polymer P3, and a polymer protective layer containing at least one polymer P4.

[0071] According to a first preferred embodiment, the barrier layer is a metal barrier layer, and at least one polymer P4 is selected from polyester, polyamide, and polycarbonate.

[0072] The metal barrier layer is preferably a metallized plastic film or a metal film, more preferably an aluminum or aluminum alloy film, and even more preferably an aluminum film. The thickness of the metal barrier layer is preferably no more than 100 μm, more preferably no more than 50 μm, and even more preferably no more than 25 μm. According to one or more embodiments, the thickness of the metal barrier layer is 1-50 μm, preferably 1.5-35 μm, more preferably 2.5-25 μm, and even more preferably 2.5-15 μm.

[0073] The polymer bonding layer and the metal barrier layer may be directly or indirectly bonded to each other on at least a portion of their opposing main surfaces, and the polymer protective layer and the metal barrier layer may be directly or indirectly bonded to each other on at least a portion of their opposing main surfaces. The term "indirect bonded" in the context of this disclosure should be understood to mean that these layers are bonded to each other via a bonding layer (e.g., an adhesive layer).

[0074] According to one or more embodiments, the polymer connecting layer and the metal barrier layer are indirectly connected to each other on at least a portion of their opposing main surfaces, and / or the polymer protective layer and the metal barrier layer are indirectly connected to each other on at least a portion of their opposing main surfaces.

[0075] According to one or more embodiments, a metal barrier layer has been bonded to at least a portion of the lower main surface of a polymer bonding layer and / or a polymer protective layer has been bonded to at least a portion of the lower main surface of a metal barrier layer.

[0076] The term "adhesive lamination" refers to a method of bonding individual layers together using an adhesive composition. Suitable adhesives for bonding the layers of a barrier composite to each other include, for example, one-component and two-component polyurethane and epoxy adhesives, non-reactive and reactive hot melt adhesives, and acrylic adhesives.

[0077] The polymer protective layer comprises at least one polymer P4 selected from polyester, polyamide, and polycarbonate. The protective layer is used to improve the barrier layer's resistance to environmental factors such as prolonged exposure to UV radiation, temperature fluctuations, scaling, and mechanical shock.

[0078] Suitable polyesters for use as at least one polymer P4 include polyethylene terephthalate (PET) and polybutylene terephthalate (PBT).

[0079] Particularly suitable poly(ethylene terephthalate) for use as at least one polymer P4 has:

[0080] - A high content of polyethylene terephthalate units, for example at least 90% by weight, preferably at least 95% by weight, more preferably at least 97.5% by weight, based on the weight of polyethylene terephthalate, and / or

[0081] - A low content of dioxyethylene terephthalate units, for example, not exceeding 10% by weight, preferably not exceeding 5% by weight, more preferably not exceeding 2.5% by weight, based on the weight of polyethylene terephthalate, and / or

[0082] - Melting temperature at or above 200°C, preferably at or above 225°C, more preferably at or above 250°C (T m The melting temperature (T) m The temperature was determined by differential scanning calorimetry (DSC) at a heating rate of 2 °C / min according to ISO 11357-3 standard.

[0083] Suitable poly(ethylene terephthalate) can be, for example, marketed under a trade name (From Goodyear Chemical Company); Product Name (from Celanese); and the product name is... (Originated from DuPont)

[0084] Suitable polyamides for use as at least one polymer P4 include aromatic and aliphatic crystalline and semi-crystalline polyamides. Amorphous polyamides are generally not preferred. The term "amorphous polyamide" herein refers to a polyamide lacking a crystalline melting point (T0) determined by differential scanning calorimetry (DSC) or an equivalent technique. m Amorphous polyamides are different from crystalline or semi-crystalline polyamides, such as nylon 6 and nylon 12.

[0085] Suitable polyamides include, for example, nylon 6 (PA6), synthesized via ring-opening polymerization of caprolactam; nylon 6-6 (PA66), synthesized via condensation polymerization of hexamethylenediamine and adipic acid; and nylon 12 (PA 12), synthesized via condensation polymerization of ω-aminolauric acid or via ring-opening polymerization of laurolactam. Bioplastic polyamides, such as nylon 11, synthesized via polymerization of 11-aminoundecanoic acid, are also suitable.

[0086] Suitable polyamides can be, for example, by trade name (From EMS Chemie) Purchased commercially, for example G16 and G21 are copolyamides containing both linear aliphatic units and cyclic aromatic components; marketed under trade names... (From Gabriel Performance Products), such as Obtained from 100 commercial purchases, it is an aliphatic polyamide; obtained under the trade name Rilsan (from Arkema), for example... TMNO TLD, BMNO TLD and AMNO TLD; and product name (Originated from Evonik) Purchased from a retailer.

[0087] The term "polycarbonate" in this disclosure refers to a polymer comprising the same or different carbonate units, or a copolymer comprising the same or different carbonate units and one or more units other than carbonate units, such as homopolymer carbonate, copolymer carbonate, and thermoplastic polyester carbonate. Suitably, polycarbonate can be obtained, for example, by reacting a bisphenol compound with a carbonate compound such as phosgene, or by a melt re-esterification method of diphenyl carbonate or dimethyl carbonate.

[0088] Suitable polycarbonates for use as at least one polymer P4 include linear and branched polycarbonates preferably having a weight-average molecular weight (Mw) in the range of 10,000-75,000 g / mol, more preferably 10,000-50,000 g / mol, and even more preferably 15,000-40,000 g / mol, wherein Mw is preferably determined by measuring the relative solution viscosity in dichloromethane or in an equal weight mixture of phenol / o-dichlorobenzene calibrated by light scattering.

[0089] Suitable polycarbonates can be, for example, by trade name (from SABIC) (from Covestro) and (Originated from Plaskolite) Purchased commercially.

[0090] According to a second preferred embodiment, the barrier layer is a polymer barrier layer comprising ethylene-vinyl alcohol as at least one polymer P3, wherein at least one polymer P4 is selected from polyester and polyamide, and the barrier composite layer further comprises a connecting layer disposed between the polymer barrier layer and the polymer connecting layer.

[0091] The term "ethylene-vinyl alcohol (EVOH)" in this invention refers to a copolymer of vinyl alcohol and ethylene. Suitable ethylene-vinyl alcohols can be obtained, for example, by hydrolysis of ethylene-vinyl acetate copolymers or by a chemical reaction of ethylene monomers with vinyl alcohols.

[0092] Suitable ethylene-vinyl alcohols for use as at least one polymer P3 have:

[0093] - A molar content of 10-75 mol%, preferably 15-65 mol%, of ethylene comonomer, and / or

[0094] - In cases where ethylene-vinyl alcohol has been obtained by hydrolysis of ethylene-vinyl acetate copolymer, the degree of hydrolysis is at least 35%, preferably at least 50%, and more preferably at least 75%.

[0095] Suitable ethylene-vinyl alcohols may be marketed, for example, under trade names. (from Mitsubishi Chemicals) and (Originated from Kuraray) Purchased from a retailer.

[0096] In an embodiment where the barrier layer is a polymer barrier layer comprising ethylene-vinyl alcohol as at least one polymer P3, a bonding layer is arranged between the polymer barrier layer and the polymer bonding layer to enable the polymer barrier layer to be bonded to the polymer bonding layer by means of thermal lamination.

[0097] Suitable polymers for use in the bonding layer include, for example, maleic anhydride-functionalized polyolefins, such as maleic anhydride-grafted homopolymers, and copolymers of ethylene and propylene.

[0098] According to one or more embodiments, the connecting layer comprises at least one maleic anhydride-grafted polyolefin, preferably selected from the group consisting of maleic anhydride-grafted polyethylene and maleic anhydride-grafted polypropylene.

[0099] Preferably, at least one maleic anhydride-grafted polyolefin accounts for at least 35% by weight of the total weight of the binder layer, more preferably at least 50% by weight, more preferably at least 75% by weight, and even more preferably at least 85% by weight.

[0100] According to one or more embodiments, the thickness of the bonding layer is 1-15% of the total thickness of the barrier composite layer, preferably 1-10%, more preferably 1.5-7.5%, and even more preferably 2-5%.

[0101] The thickness of the bonding layer is preferably no more than 75 μm, more preferably no more than 50 μm, and even more preferably no more than 35 μm. According to one or more embodiments, the thickness of the polymer barrier layer is 0.5-65 μm, preferably 1-50 μm, more preferably 1.5-25 μm, even more preferably 1.5-20 μm, and even more preferably 2-10 μm.

[0102] Preferred polyesters and polyamides used as at least one polymer P4 have been discussed above.

[0103] According to a third preferred embodiment, the barrier layer is a polymer barrier layer comprising polyamide as at least one polymer P3, wherein at least one polymer P4 is polyester, and the barrier composite layer further comprises a connecting layer disposed between the barrier layer and the polymer connecting layer.

[0104] Preferred embodiments of the preferred polyamide used as at least one polymer P3, the preferred polyester used as at least one polymer P4, and the connecting layer have been discussed above.

[0105] The thickness of the polymer barrier layer is preferably no more than 350 μm, more preferably no more than 250 μm, and even more preferably no more than 150 μm. According to one or more embodiments, the thickness of the polymer barrier layer is 1-300 μm, preferably 2.5-200 μm, more preferably 5-150 μm, even more preferably 10-100 μm, and still more preferably 10-50 μm.

[0106] The thickness of the polymer protective layer is preferably no more than 250 μm, more preferably no more than 150 μm, and even more preferably no more than 100 μm. According to one or more embodiments, the thickness of the polymer barrier layer is 1-150 μm, preferably 2.5-100 μm, more preferably 5-100 μm, and even more preferably 10-50 μm.

[0107] The polymer barrier layer and the polymer protective layer may be directly or indirectly connected to each other on at least a portion of their opposing main surfaces.

[0108] According to one or more embodiments, the polymer barrier layer and the polymer protective layer are directly connected to each other on at least a portion of their opposing main surfaces.

[0109] According to one or more embodiments, the polymer protective layer is thermally laminated to at least a portion of the lower main surface of the polymer barrier layer in a manner that provides direct adhesion between the polymer protective layer and the polymer barrier layer.

[0110] According to one or more embodiments, the sealing device further includes a fibrous material layer fully embedded in the polymer waterproofing layer and / or a second polymer waterproofing layer covering at least a portion of the upper main surface of the polymer waterproofing layer. The expression "fully embedded" means that the fibrous material layer is completely covered by the matrix of the polymer waterproofing layer.

[0111] When sealing devices are exposed to changing environmental conditions, especially large temperature fluctuations, fiber material layers can be used to ensure mechanical stability.

[0112] The term "fibrous material" herein refers to a material composed of fibers, which include, for example, organic, inorganic, or synthetic organic materials or are composed of them. Examples of organic fibers include, for example, cellulose fibers, cotton fibers, and protein fibers. Particularly suitable synthetic organic materials include, for example, homopolymers and copolymers of polyester, ethylene, and / or propylene, viscose, nylon, and polyamides. Fiber materials composed of inorganic fibers are also suitable, particularly those composed of metal or mineral fibers, such as glass fibers, aramid fibers, wollastonite fibers, and carbon fibers. Inorganic fibers (which have been, for example, surface-treated with silane) may also be suitable. Fiber materials can comprise short fibers, long fibers, spun fibers (yarns), or filaments. Fibers can be aligned or stretched. It may also be advantageous for fiber materials to consist of fibers of different types in geometry and composition.

[0113] Preferably, the fibrous material layer is selected from nonwoven fabrics, woven fabrics, and loosely woven fabrics.

[0114] The term "nonwoven fabric" as used herein refers to a material composed of fibers bonded together by chemical, mechanical, or thermal bonding methods, and which is neither woven nor knitted. Nonwoven fabrics can be produced, for example, by using carding or needle-punching processes, in which the fibers are mechanically entangled to obtain the nonwoven fabric. In chemical bonding, chemical adhesives such as bonding materials are used to hold the fibers together in the nonwoven fabric.

[0115] The term "laid scrim" in this disclosure refers to a web-like nonwoven product composed of at least two sets of parallel yarns (also called weft and warp yarns) that are overlapped and chemically bonded to each other. The yarns of a nonwoven scrim are typically arranged toward each other at an angle of 60–120° (e.g., 90 ± 5°), thus forming gaps that occupy more than 60% of the total surface area of ​​the laid scrim. Typical materials for laid scrims include metal fibers, inorganic fibers, particularly glass fibers, and synthetic organic fibers, particularly polyester, polypropylene, polyethylene, and polyethylene terephthalate (PET).

[0116] According to one or more embodiments, the fiber material layer is a nonwoven fabric, which preferably has a density of no more than 350 g / m². 2 The mass per unit weight is preferably no more than 300 g / m². 2 According to one or more embodiments, the fiber material layer is a nonwoven fabric with a density of 15-300 g / m². 2 The preferred mass per unit area is 20-250 g / m². 2 More preferably 25-200g / m 2 Even better, 30-150g / m 2 .

[0117] Preferably, the nonwoven fabric comprises synthetic organic and / or inorganic fibers. Particularly suitable synthetic organic fibers for nonwoven fabrics include, for example, polyester fibers, polypropylene fibers, polyethylene fibers, nylon fibers, and polyamide fibers. Particularly suitable inorganic fibers for nonwoven fabrics include, for example, glass fibers, aramid fibers, wollastonite fibers, and carbon fibers.

[0118] According to one or more embodiments, the nonwoven fabric of the fiber material layer has synthetic organic fibers as the main fiber component, preferably selected from polyester fibers, polypropylene fibers, polyethylene fibers, nylon fibers, and polyamide fibers. According to one or more other embodiments, the nonwoven fabric of the fiber material layer has inorganic fibers as the main fiber component, preferably selected from glass fibers, aramid fibers, wollastonite fibers, and carbon fibers, more preferably glass fibers.

[0119] The second polymer waterproofing layer may have the same or different composition as the polymer waterproofing layer. According to one or more embodiments, the second polymer waterproofing layer comprises at least 25% by weight, preferably at least 35% by weight, more preferably at least 45% by weight, and even more preferably at least 55% by weight of at least one polymer P1 based on the total weight of the second polymer waterproofing layer.

[0120] The polymer waterproofing layer and the second polymer waterproofing layer may be directly or indirectly connected to each other on at least a portion of their opposing main surfaces. According to one or more embodiments, the polymer waterproofing layer and the second polymer waterproofing layer are directly connected to each other on at least a portion of their opposing main surfaces.

[0121] Furthermore, it is preferable that the sealing device exhibits an impact resistance of 200-1500 mm as measured according to EN 12691:2005; and / or a longitudinal and transverse tensile strength of at least 5 MPa as measured according to DIN ISO 527-3 at 23°C; and / or a longitudinal and transverse elongation at break of at least 300% as measured according to DIN ISO 527-3 at 23°C; and / or a water resistance of 0.6 bar for 24 hours as measured according to EN 1928B; and / or a maximum tear strength of at least 100 N as measured according to EN 12310-2.

[0122] According to one or more embodiments, the sealing device further includes a pressure-sensitive adhesive covering at least a portion of the lower main surface of the polymer protective layer.

[0123] The term "pressure-sensitive adhesive" in this disclosure refers to a viscoelastic material that adheres immediately to virtually any type of substrate upon application of slight pressure and is permanently tacky. The tack of the adhesive layer can be measured, for example, as loop tack. Preferably, the loop tack of the pressure-sensitive adhesive composition on a glass plate, measured at 23°C, is at least 2.5 N / 25 mm, more preferably at least 5 N / 25 mm, and more preferably at least 10 N / 25 mm. The loop tack can be measured using "FINAT Test Method No. 9 (FTM9)" as defined in the FINAT Technical Handbook, 9th edition, published in 2014.

[0124] Suitable pressure-sensitive adhesive layers include, for example, water-based, solvent-based, hot-melt, and crosslinked pressure-sensitive adhesives, such as UV-cured pressure-sensitive adhesives. The term "hot-melt pressure-sensitive adhesive (HM-PSA)" in this disclosure refers to a solvent-free pressure-sensitive adhesive applied in melt form.

[0125] Suitable pressure-sensitive adhesives include those based on acrylic polymers, styrene block copolymers, amorphous polyolefins (APO), amorphous poly-α-olefins (APAO), vinyl ether polymers, bitumen, and elastomers, such as styrene-butadiene rubber (SBR), ethylene propylene diene monomer (EPDM) rubber, butyl rubber, polyisoprene, polybutadiene, natural rubber, polychloroprene rubber, ethylene-propylene rubber (EPR), nitrile rubber, acrylic rubber, ethylene-vinyl acetate rubber, and silicone rubber. In addition to the polymers mentioned above, suitable pressure-sensitive adhesives typically contain one or more additional components, including, for example, tackifying resins, waxes, and additives such as UV light absorbers, UV stabilizers and heat stabilizers, optical brighteners, pigments, dyes, and drying agents.

[0126] According to one or more preferred embodiments, the pressure-sensitive adhesive layer is composed of an acrylic pressure-sensitive adhesive. The term "acrylic pressure-sensitive adhesive" in this disclosure refers to a pressure-sensitive adhesive composition comprising one or more acrylic polymers as the main polymer component.

[0127] Suitable acrylic pressure-sensitive adhesives include, for example, water-based acrylic pressure-sensitive adhesives, solvent-based acrylic pressure-sensitive adhesives, hot melt acrylic pressure-sensitive adhesives (HM-PSA), and UV-curable acrylic pressure-sensitive adhesives.

[0128] Preferably, the pressure-sensitive adhesive layer covers at least 50% of the area of ​​the lower main surface of the polymer protective layer, more preferably at least 75%, even more preferably at least 85%, and still more preferably at least 95% by weight. According to one or more embodiments, the pressure-sensitive adhesive layer substantially covers the entire area of ​​the lower main surface of the polymer protective layer, for example, at least 97.5% of the area of ​​the lower main surface of the polymer protective layer, preferably at least 99%.

[0129] The pressure-sensitive adhesive layer can exist on the lower main surface of the polymer protective layer in the form of a continuous or discontinuous adhesive layer. The term "continuous adhesive layer" in this disclosure refers to a layer consisting of a single region coated with an adhesive composition, while the term "discontinuous adhesive layer" refers to a layer consisting of two or more regions coated with an adhesive composition, these regions not connected to each other to form a continuous layer. According to one or more embodiments, the pressure-sensitive adhesive layer is a continuous adhesive layer.

[0130] The preferred thickness of the pressure-sensitive adhesive layer depends on the detailed composition of the adhesive. According to one or more embodiments, the pressure-sensitive adhesive layer has a thickness of 25-500 μm, preferably 50-350 μm, more preferably 75-300 μm, even more preferably 100-250 μm, particularly 100-200 μm, and / or at least 75 g / m², as measured using the measurement method defined in EN 1849-2:2019. 2 Preferably at least 100g / m 2 More preferably at least 125g / m 2 For example, 100-1000g / m 2 The coating weight is preferably 125-750 g / m². 2 More preferably 150-500g / m 2 Even better, 150-350g / m 2 .

[0131] According to one or more embodiments, the sealing device further includes a release film covering at least a portion of the outer main surface of the pressure-sensitive adhesive layer away from the lower main surface of the polymer protective layer. Preferably, the pressure-sensitive adhesive layer and the release film are directly bonded to each other on at least a portion of their opposing main surfaces. The release film can be used to prevent premature unwanted adhesion and protect the pressure-sensitive adhesive layer from moisture, dirt, and other environmental factors. When the sealing device is provided in roll form, the release film allows for easy unfolding without the adhesive adhering to the back of the sealing device. The release film can be cut into multiple sections to allow partial separation from the adhesive layer.

[0132] Suitable materials for release films include kraft paper, polyethylene-coated paper, silicone-coated paper, and polymer films, such as polyethylene, polypropylene, and polyester films coated with a polymer release agent selected from silicone, silicone urea, urethane, wax, and long-chain alkyl acrylate release agents.

[0133] Unless otherwise stated, the preferred options given above for polymer waterproofing layers, barrier composite layers, fiber material layers, and pressure-sensitive adhesive layers also apply to all aspects of this invention.

[0134] Another subject of the present invention is a method for producing the sealing device of the present invention, the method comprising the following steps:

[0135] I) Provides a polymer waterproof layer (2) and a barrier composite layer (3), and

[0136] II) The barrier composite layer (3) is laminated to the lower main surface of the polymer waterproof layer (2).

[0137] The steps of providing the barrier composite layer may include providing a polymer bonding layer, optional connecting layer, barrier layer, and polymer protective layer, and bonding these layers together. The bonding of the individual layers of the barrier composite layer can be performed using any conventional techniques known to those skilled in the art, such as thermal melting, thermal lamination, or adhesive lamination. The composite barrier layer is preferably bonded to the lower main surface of the polymer waterproofing layer using a thermal lamination method.

[0138] Further details of the method for producing the sealing device depend on the implementation of the sealing device, and in particular on the type of each layer of the barrier composite layer.

[0139] For example, when the barrier layer is a metal barrier layer, the step of providing the barrier composite layer may include bonding the polymer linking layer, the metal barrier layer, and the polymer protective layer to each other using adhesive lamination methods. Alternatively, the metal barrier layer may first be bonded to the polymer protective layer using adhesive lamination methods, and then the polymer linking layer may be coated onto the opposite surface of the metal barrier layer by film casting.

[0140] In the case of a polymer barrier layer, the step of providing the barrier composite layer may include co-extruding a composition of a polymer connecting layer, a bonding layer, a polymer barrier layer, and a polymer protective layer to obtain a composite barrier layer. The barrier composite layer is then laminated to the lower main surface of the polymer waterproof layer using a thermal lamination method.

[0141] In cases where the sealing device includes a pressure-sensitive adhesive layer, the method for manufacturing the sealing device includes an additional step III of applying a pressure-sensitive adhesive composition to the lower main surface of the polymer protective layer.

[0142] Pressure-sensitive adhesive compositions can be applied to the lower main surface of a polymer protective layer using any conventional technique, such as slot die coating, extrusion coating, roll coating, direct gravure coating, offset gravure coating, reverse gravure roll coating, powder dispersion, or spray coating techniques.

[0143] According to one or more embodiments, the method for producing a sealing device includes an additional step IV of winding the composite element obtained in step II) or III) into a roll.

[0144] Another subject of the invention is a roofing system comprising a roofing pad (10) and a sealing device (1) of the invention, which is adhered to the surface of the roofing pad (10) by means of mechanical or adhesive bonding.

[0145] According to one or more embodiments, the roof lining includes a cover plate and / or insulation panels.

[0146] Preferably, the insulation board comprises at least one foam board with a closed-cell structure. Suitable foam boards with closed-cell structures include molded expanded polystyrene (EPS) foam boards, extruded expanded polystyrene (XPS) foam boards, polyurethane foam boards (PUR) and polyisocyanurate (PIR) foam boards.

[0147] There is no particular limitation on the thickness of the insulation board, but it is preferable that the insulation board has a thickness of 5-500 mm, preferably 10-350 mm, or even more preferably 25-150 mm, determined by the measurement method defined in DIN EN 1849-2 standard.

[0148] According to one or more embodiments, the insulation panel includes at least one foam panel with a closed-cell structure, selected from the group consisting of molded expanded polystyrene (EPS) foam panels, extruded expanded polystyrene (XPS) foam panels, polyurethane foam panels (PUR) and polyisocyanurate (PIR) foam panels, preferably having a density of 10-150 g / L, more preferably 15-100 g / L, and even more preferably 25-75 g / L.

[0149] Insulation panels can be fixed to roof substrates, such as roof panels, using any suitable fastening means, such as by using adhesive bonding or mechanical fastening.

[0150] According to one or more embodiments, the roof lining includes a cover plate.

[0151] Suitable cover plates include, for example, gypsum board, fiber-reinforced gypsum board, wood fiberboard, cement board, high-density (compressed) polyisocyanurate board, perlite board, bitumen board, mineral fiberboard, and plywood or oriented strand board. The cover plate may also be used in place of the insulation board.

[0152] According to one or more embodiments, the roof lining comprises an insulation panel and a cover plate, wherein the cover plate is located between the sealing device and the insulation panel. The cover plate can be secured to the insulation panel using any suitable fastening means, such as by using adhesive bonding or mechanical fastening.

[0153] According to one or more embodiments, the roof system further includes a vapor control layer disposed on the bottom side of the roof lining opposite one side of the sealing device.

[0154] The vapor control layer is impermeable to liquids but at least partially permeable to water vapor. According to one or more embodiments, the vapor control layer has an equivalent air layer thickness (Sd value) for water vapor diffusion of no more than 100 m, preferably no more than 50 m, as measured according to the method defined in ISO 1931.

[0155] According to one or more other embodiments, the vapor control layer has variable water vapor diffusion resistance. In these embodiments, the vapor control layer has lower water vapor diffusion resistance at higher ambient relative humidity and higher water vapor diffusion resistance at lower ambient relative humidity. For example, the Sd value of the vapor control layer can be in the range of 0.5-20 m at 80% relative humidity, preferably in the range of 1-10 m, and in the range of 25-100 m at 20% relative humidity, preferably in the range of 35-65 m.

[0156] The composition of the vapor control layer is not particularly limited. Preferably, the vapor control layer comprises at least a polymer selected from polyethylene (PE), polypropylene (PP), ethylene-vinyl acetate copolymer (EVA), ethylene-α-olefin copolymer, ethylene-propylene copolymer, polyvinyl chloride (PVC), ethylene-acrylic acid copolymer, polyurethane, polyester, copolyester, polyether ester, polystyrene (PS), polyethylene terephthalate (PET), polyamide (PA), copolyamide, and ionomers. The term "ionomer" refers to a polymer containing ionic groups, which are carboxylates, such as ammonium carboxylates, alkali metal carboxylates, alkaline earth carboxylates, transition metal carboxylates, and / or combinations of such carboxylates. Such polymers are typically prepared by partially or completely neutralizing the carboxyl groups of a precursor or parent polymer into an acid copolymer, for example, by reacting with a base.

[0157] Preferably, the vapor control layer has a thickness of 5-500 μm, more preferably 25-350 μm, or even more preferably 50-250 μm and / or 25-500 g / m². 2 More preferably 50-350g / m 2 , or even better, 75-250g / m 2 The mass per unit.

[0158] According to one or more embodiments, the sealing device is adhered to the surface of the roofing pad via an adhesive layer.

[0159] According to one or more embodiments, at least 50%, preferably at least 75%, and most preferably at least 85% of the area of ​​the lower main surface of the polymer protective layer is adhered to the surface of the roofing mat by an adhesive layer. According to one or more embodiments, the entire area of ​​the lower main surface of the polymer protective layer is adhered to the surface of the roofing mat by an adhesive layer. Example

[0160] Sample preparation

[0161] The first exemplary sealing device has the following configuration:

[0162] i. A polymer waterproof layer reinforced with polyester sparse fabric, the waterproof layer having a thickness of 1.2 mm ( TM-12), and

[0163] ii. A barrier composite layer comprising:

[0164] a) A polyethylene layer with a thickness of 100 μm.

[0165] b) Aluminum foil with a thickness of 7 μm, and

[0166] c) A 12 μm thick poly(ethylene terephthalate) layer.

[0167] A first exemplary sealing device is prepared by bonding layers a) to c) together using an adhesive lamination method, and then bonding the resulting barrier composite layer to the lower main surface of the polymer waterproof layer via a polyethylene layer using a thermal lamination method.

[0168] The second exemplary sealing device has the following configuration:

[0169] i. A polymer waterproof layer reinforced with polyester sparse fabric, the waterproof layer having a thickness of 1.2 mm ( TM-12), and

[0170] ii. A barrier composite layer comprising:

[0171] a) A polyethylene layer with a thickness of 85 μm.

[0172] b) An EVOH layer with a thickness of 12 μm, and

[0173] c) A 50 μm thick poly(ethylene terephthalate) layer.

[0174] A 3 μm thick bonding layer is arranged between the polyethylene layer a) and the EVOH layer b).

[0175] A second exemplary sealing device is prepared by co-extruding layers a) to c) and a connecting layer, and then by using a thermal lamination method to bond the resulting barrier composite layer to the lower main surface of the polymer waterproof layer via a polyethylene layer.

[0176] Then, a layer of butyl adhesive is coated on the lower main surface of the polymer protective layer, with a coating amount of 400 g / m². 2 The butyl adhesive contains butyl resin, tackifying resin, processing oil, liquid rubber, and filler. The adhesive and mechanical properties of the resulting sealing device are then tested.

[0177] In the reference embodiment, a sealing device with a polymer waterproof layer that does not contain a barrier composite layer is used.

[0178] Table 1 shows the adhesive peel resistance and low-temperature flexibility when peeled from the TPO film.

[0179] 180° shear and peel strength

[0180] A 50×250mm sample was cut from the test sealing device and bonded to a TPO film using a butyl adhesive layer. Peel resistance was then measured. All tests were conducted at 23±2°C with a peel angle of 180°. Peel resistance measurements were performed according to EN 12316.

[0181] Low temperature flexibility

[0182] Low-temperature flexibility was measured according to EN 495-5 standard. In the measurement, the sample of the tested sealing device was bent at -40°C, and then visually analyzed for the presence of cracks in the polymer layer.

[0183]

Claims

1. A sealing device (1), said sealing device being a waterproof membrane or roofing membrane, comprising: i. A polymer waterproof layer (2), comprising at least one polymer P1 and having an upper main surface and a lower main surface, ii. A barrier composite layer (3), said barrier composite layer covering at least a portion of the lower main surface of the polymer waterproof layer, wherein said barrier composite layer comprises: a) A polymeric linking layer (4) comprising at least one polymer P2, said polymeric linking layer (4) having a thickness in the range of 15 μm to 350 μm. b) Barrier layer (5), and c) Polymer protective layer (6), wherein The polymer bonding layer (4) is disposed between the polymer waterproof layer (2) and the barrier layer (5), wherein the barrier layer (5) is a metal barrier layer or a polymer barrier layer comprising at least one polymer P3 selected from ethylene-vinyl alcohol and polyamide, and the polymer protective layer (6) comprises at least one polymer P4 selected from polyester, polyamide and polycarbonate.

2. The sealing device according to claim 1, wherein the polymer waterproof layer (2) and the polymer connecting layer (4) are polyolefin-based layers.

3. The sealing device according to claim 1, wherein the at least one polymer P1 and P2 are selected from ethylene copolymers, polyethylene, propylene copolymers and polypropylene.

4. The sealing device according to any one of claims 1 to 3, wherein the at least one polymer P1 accounts for at least 35% of the total weight of the polymer waterproof layer (2).

5. The sealing device according to any one of claims 1 to 3, wherein the at least one polymer P1 accounts for at least 45% of the total weight of the polymer waterproof layer (2).

6. The sealing device according to any one of claims 1 to 3, wherein the polymer waterproof layer (2) has a thickness in the range of 0.25 mm to 5.0 mm.

7. The sealing device according to any one of claims 1 to 3, wherein the polymer waterproof layer (2) has a thickness in the range of 0.5 mm to 3.5 mm.

8. The sealing device according to any one of claims 1 to 3, wherein the at least one polymer P2 accounts for at least 50% of the total weight of the polymer bonding layer (4).

9. The sealing device according to any one of claims 1 to 3, wherein the at least one polymer P2 accounts for at least 65% of the total weight of the polymer bonding layer (4).

10. The sealing device according to any one of claims 1 to 3, wherein the polymer bonding layer (4) has a thickness in the range of 35 μm to 250 μm.

11. The sealing device according to any one of claims 1 to 3, wherein the polymer bonding layer (4) has been thermally laminated to at least a portion of the lower main surface of the polymer waterproof layer (2) in a manner that provides a direct bond between the polymer bonding layer (4) and the polymer waterproof layer (2).

12. The sealing device according to any one of claims 1 to 3, wherein the barrier layer (5) is a metal barrier layer, or The barrier layer (5) is a polymer barrier layer containing ethylene-vinyl alcohol as the at least one polymer P3, the at least one polymer P4 being selected from polyester and polyamide, and the barrier composite layer (3) further includes a connecting layer (7) disposed between the barrier layer (5) and the polymer connecting layer (4), or The barrier layer (5) is a polymer barrier layer containing polyamide as the at least one polymer P3, the at least one polymer P4 is polyester, and the barrier composite layer (3) further includes a connecting layer (7) disposed between the barrier layer (5) and the polymer connecting layer (4).

13. The sealing device according to claim 12, wherein the barrier layer (5) is an aluminum or aluminum alloy film.

14. The sealing device according to claim 12, wherein, The connecting layer (7) contains at least one maleic anhydride-grafted polyolefin.

15. The sealing device according to claim 14, wherein the maleic anhydride-grafted polyolefin is selected from the group consisting of maleic anhydride-grafted polyethylene and maleic anhydride-grafted polypropylene.

16. The sealing device according to claim 12, wherein the thickness of the metal barrier layer is in the range of 1-50 μm.

17. The sealing device according to claim 16, wherein the thickness of the metal barrier layer is in the range of 1.5-35 μm.

18. The sealing device according to claim 12, wherein the polymer barrier layer has a thickness in the range of 1-300 μm.

19. The sealing device according to claim 12, wherein the polymer barrier layer has a thickness in the range of 2.5-200 μm.

20. The sealing device according to claim 12, wherein the thickness of the polymer protective layer (6) is 1-150 μm.

21. The sealing device according to claim 20, wherein the thickness of the polymer protective layer (6) is 2.5-100 μm.

22. The sealing device according to any one of claims 1 to 3 further comprises a fiber material layer (8) completely embedded in the polymer waterproof layer (2) and / or a second polymer waterproof layer (2') covering at least a portion of the upper main surface of the polymer waterproof layer (2).

23. The sealing device according to claim 22, wherein the fiber material layer (8) is selected from nonwoven fabrics, and the nonwoven fabric comprises inorganic and / or organic fibers.

24. The sealing device according to any one of claims 1 to 3 further comprises a pressure-sensitive adhesive layer (9) covering at least a portion of the lower main surface of the polymer protective layer (6).

25. A method for producing a sealing device (1) according to any one of claims 1 to 24, the method comprising the following steps: I) Provides a polymer waterproof layer (2) and a barrier composite layer (3), and II) The barrier composite layer (3) is laminated to the lower main surface of the polymer waterproof layer (2).

26. A roofing system comprising a roofing pad (10) and a sealing device (1) according to any one of claims 1-24, the sealing device (1) being adhered to the surface of the roofing pad (10) by means of mechanical or adhesive bonding.

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