Steam channel type modified asphalt waterproofing membrane

Abstract

The utility model provides a kind of steam passage type modified asphalt waterproof roll, belong to waterproof roll technical field, this steam passage type modified asphalt waterproof roll includes from top to bottom: surface isolation layer, first modified asphalt layer, reinforcing base layer, second modified asphalt layer, steam barrier, self-adhesive modified asphalt layer;Among them, the width of steam barrier is less than the width of self-adhesive modified asphalt layer, self-adhesive modified asphalt layer is composed of multiple mutually spaced asphalt strips, the asphalt strip at both ends is bonded with second modified asphalt layer as lap edge, steam barrier is located in the middle of lap edge, and any adjacent two asphalt strips and steam barrier form channel for discharging water vapor.

Description

Technical Field

[0001] This utility model belongs to the field of waterproof membrane technology, and in particular relates to a steam channel type modified bitumen waterproof membrane. Background Technology

[0002] Roof waterproofing and insulation structures, from bottom to top, mainly consist of two forms: structural layer (base layer) - insulation layer - waterproof layer - protective layer, and structural layer - waterproof layer - insulation layer - protective layer. When waterproof membranes and insulation layers are used in combination, indoor water vapor, under saturated vapor pressure, often penetrates the insulation layer through the structural layer, reducing the insulation performance. Furthermore, the long-term impact of water vapor on the waterproof layer causes it to peel off and accelerate aging. Additionally, when cracks exist in the structural layer, the structure of the traditional waterproof membrane is damaged, further exacerbating the impact of indoor water vapor on the membrane, causing blistering, aging, and even cracking. Utility Model Content

[0003] To address the aforementioned technical problems, a vapor channel type modified bitumen waterproof membrane is provided. By employing an extensible vapor barrier layer and designing the vapor channel structure, the problems of blistering and peeling, aging, and structural layer cracking that lead to a decline in the vapor barrier and waterproof performance of the waterproof membrane due to water vapor can be solved. The technical solution provided by this utility model is as follows.

[0004] According to an embodiment of this utility model, a vapor channel type modified bitumen waterproof membrane, from top to bottom, includes: a surface isolation layer, a first modified bitumen layer, a reinforcing base layer, a second modified bitumen layer, a vapor barrier layer, and a self-adhesive modified bitumen layer; wherein, the width of the vapor barrier layer is smaller than the width of the self-adhesive modified bitumen layer, the self-adhesive modified bitumen layer is composed of multiple bitumen strips spaced apart from each other, the bitumen strips at both ends serve as overlapping edges and are bonded to the second modified bitumen layer, the vapor barrier layer is located in the middle of the overlapping edges, and any two adjacent bitumen strips and the vapor barrier layer form a channel for venting water vapor.

[0005] In some embodiments of the utility model, the steam channel type modified bitumen waterproof membrane further includes: a silicone-coated isolation base film bonded to the self-adhesive modified bitumen layer.

[0006] In some embodiments of the utility model, the surface isolation layer, the first modified asphalt layer, the reinforced base layer, the second modified asphalt layer, and the self-adhesive modified asphalt layer have the same width.

[0007] In some embodiments of the utility model, the width of the silicone-coated isolation base film is 30mm-50mm wider than the width of the self-adhesive modified bitumen layer.

[0008] In some embodiments of the utility model, the width of the overlapping edge is 5-12cm, the width of the asphalt strips between the overlapping edges is the same or different and is 5-10cm each independently, and the spacing between the asphalt strips is 5-10cm.

[0009] In some embodiments of the utility model, the total thickness of the steam channel type modified bitumen waterproof membrane is 3.5-5.5 mm.

[0010] In some embodiments of the utility model, the vapor barrier is an extended film with a thickness of 0.3-0.5 mm.

[0011] In some embodiments of the utility model, the thickness of the first modified asphalt layer and the second modified asphalt layer may be the same or different, with a thickness of 1.0 mm to 2.5 mm; the thickness of the self-adhesive modified asphalt layer is 0.6 mm to 1.0 mm.

[0012] In some embodiments of the utility model, the thickness of the silicone-coated isolation substrate is 25-45 μm.

[0013] In some embodiments of the utility model, the vapor barrier is selected from any one of polypropylene or polyethylene films.

[0014] Based on the above technical solution, the steam-channel type modified bitumen waterproof membrane provided by this utility model has at least the following beneficial effects:

[0015] (1) In the technical solution of this utility model, a vapor barrier is used. On the one hand, it can block the transmission of water vapor from the structural layer (i.e. the base layer) to the modified asphalt layer above, thus solving the problems of blistering, peeling and aging of traditional waterproof membranes due to water vapor. On the other hand, when the structural layer cracks or undergoes other deformations, the waterproof membrane can still maintain good waterproof and vapor barrier performance by utilizing the good extensibility of the vapor barrier, thus extending the life of the waterproof membrane.

[0016] (2) In the technical solution of this utility model, the vapor barrier layer in the waterproof membrane is set between the overlapping edges and the overlapping edges are bonded to the second modified bitumen layer, which can improve the waterproof performance of the waterproof membrane. At the same time, the overlapping edges are used to achieve the bonding of any two adjacent waterproof membranes.

[0017] (3) In the technical solution of this utility model, the self-adhesive modified bitumen layer is composed of multiple bitumen strips spaced apart from each other. Any two adjacent bitumen strips and the vapor barrier layer form a channel for venting water vapor, which can timely vent water vapor transmitted from the structural layer to the waterproof membrane, reduce the impact of water vapor on the waterproof membrane and prevent the modified bitumen layer from being eroded by water vapor, solve the problems of blistering, peeling and aging of the waterproof membrane, and extend the service life of the waterproof membrane. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the structure of the steam channel type modified bitumen waterproof membrane in this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the steam channel type modified bitumen waterproof membrane in this utility model for discharging water vapor.

[0020] [Attached image labels]

[0021] 1-Surface isolation layer, 2-First modified asphalt layer, 3-Reinforced base layer, 4-Second modified asphalt layer, 5-Vacuum barrier layer, 6-Self-adhesive modified asphalt layer, 601-Asphalt strip, 7-Channel, 8-Silicone-coated isolation base film. Detailed Implementation

[0022] The embodiments of the present invention will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In the following detailed description, numerous specific details are set forth to provide a comprehensive understanding of the embodiments of the present invention for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the present invention.

[0023] Common problems encountered when using conventional waterproof membranes and insulation boards in combination include: 1) Indoor water vapor, under vapor pressure, penetrates into the insulation layer through the gaps in the structural board. Water's thermal conductivity is about 20 times that of air, and the presence of a large amount of water will severely reduce the insulation performance of the insulation layer; 2) The vapor pressure formed by accumulated water after exposure to sunlight will increase the impact on the upper waterproof layer, causing problems such as blistering, peeling, and accelerated aging; 3) The thermal bridging effect generated by water vapor will increase the roof's energy consumption burden and reduce living comfort; 4) Waterproof membranes are mainly bonded to the substrate with full adhesion. This method can effectively improve the overall waterproof performance of the roof, but it can also cause structural damage to the membrane due to cracking and deformation of the substrate; 5) The membrane is also subject to indoor vapor pressure, resulting in problems such as blistering and fatigue aging.

[0024] Currently, conventional waterproof membranes, including modified bitumen waterproof membranes, cannot effectively remove water vapor. Setting up a vapor barrier on the structural layer is a common solution, but it still cannot remove the vapor.

[0025] To address the problems of current waterproof membranes being susceptible to water vapor during use, leading to blistering, peeling, aging, and loss of waterproofing function due to the inability to effectively expel steam, and the issue of structural layer cracking or deformation rendering the waterproof membrane unusable, this invention provides a vapor channel type modified bitumen waterproof membrane. The design of the waterproof membrane's structure resists deformation of the structural or insulation layers, allows water vapor to escape from the insulation board, and isolates the waterproof membrane from water vapor erosion, thus extending the membrane's service life.

[0026] Specifically, Figure 1 This is a structural schematic diagram of the steam-channel type modified bitumen waterproof membrane in this utility model. Figure 2 This is a schematic diagram of the structure of the steam channel type modified bitumen waterproof membrane in this utility model for discharging water vapor.

[0027] like Figures 1-2 As shown, the vapor channel type modified bitumen waterproof membrane, from top to bottom, includes: a surface isolation layer 1, a first modified bitumen layer 2, a reinforcing base layer 3, a second modified bitumen layer 4, a vapor barrier layer 5, and a self-adhesive modified bitumen layer 6; wherein, the width of the vapor barrier layer 5 is smaller than the width of the self-adhesive modified bitumen layer 6, the self-adhesive modified bitumen layer 6 is composed of multiple bitumen strips 601 spaced apart from each other, the bitumen strips 601 at both ends serve as overlapping edges and are bonded to the second modified bitumen layer 4, the vapor barrier layer 5 is located in the middle of the overlapping edges, and any two adjacent bitumen strips 601 and the vapor barrier layer 5 form a channel 7 for venting water vapor.

[0028] In the embodiments of this utility model, a vapor barrier layer 5 is employed. On the one hand, it can prevent water vapor from being transmitted from the structural layer (i.e., the base layer) or the insulation layer to the upper modified bitumen layer, solving the problems of blistering, peeling, and aging of traditional waterproof membranes due to water vapor. On the other hand, the good extensibility of the vapor barrier layer 5 allows the waterproof membrane to maintain good waterproof and vapor-barrier performance, extending its lifespan and solving the problem of waterproof membranes failing to waterproof and becoming unusable due to cracking of the structural layer. By employing the extensible vapor barrier layer 5 and coordinating it with a vapor channel structure design, water vapor in the insulation layer or structural layer can be discharged in a timely manner, preventing water vapor from eroding the upper modified bitumen layer. The overlapping edge structure design further enhances the waterproof performance.

[0029] According to the embodiments of this utility model, continuing as follows: Figure 1As shown, the steam-channel type modified bitumen waterproof membrane also includes a silicone-coated release liner 8 bonded to the self-adhesive modified bitumen layer 6. This release liner 8 is primarily used to protect the waterproof membrane from damage and to prevent it from sticking during winding and transportation. It can be removed during construction. In this invention, the silicone-coated release liner 8 can be any one of polyethylene terephthalate (PET), polyethylene (PE), or polypropylene (PP). Furthermore, the width of the silicone-coated release liner 8 is 30mm-50mm wider than the width of the self-adhesive modified bitumen layer 6 to facilitate easy removal during construction.

[0030] According to an embodiment of the present invention, the surface isolation layer 1, the first modified asphalt layer 2, the reinforced base layer 3, the second modified asphalt layer 4, and the self-adhesive modified asphalt layer 6 have the same width.

[0031] According to an embodiment of this utility model, the surface isolation layer 1 can be made of any one of the following materials: fine sand, low-density polyethylene (LDPE) film, or silicone-coated isolation film. Its main function is to isolate the waterproof membrane, preventing it from sticking together during winding and transportation, and preventing damage to the modified asphalt layer. When the surface isolation layer 1 is made of a thin film material, its thickness is 10-15 μm.

[0032] According to embodiments of this utility model, the first modified bitumen layer 2 and the second modified bitumen layer 4 are mainly used for waterproofing and are the main waterproofing layers in the waterproof membrane. In this utility model, the first modified bitumen layer 2 and the second modified bitumen layer 4 can be SBS (styrene-butadiene-styrene) modified bitumen or other modified bitumen. The SBS modified bitumen layer can be obtained by modifying the bitumen with an SBS modifier, or by modifying the bitumen with other modifiers; the specific modifier is not limited in detail here. It should be noted that the modified bitumen used in this utility model has good high-temperature resistance and anti-aging properties. Further, the composition and / or thickness of the first modified bitumen layer 2 and the second modified bitumen layer 4 may be the same or different, with a thickness of 1.0mm-2.5mm, preferably 1.5mm-2.5mm. It is a high-temperature resistant modified bitumen with a heat resistance ≥90℃ and a cohesive strength ≥1.5N / mm, to meet the waterproofing requirements of the waterproof membrane. For example, the thickness of the first modified asphalt layer 2 is 1.0 mm, and the thickness of the second modified asphalt layer 4 is 1.5 mm; or the thickness of the first modified asphalt layer 2 is 2.5 mm, and the thickness of the second modified asphalt layer 4 is 1.5 mm.

[0033] According to an embodiment of this utility model, the reinforcing base layer 3 is disposed between the first modified bitumen layer 2 and the second modified bitumen layer 4, which can play a reinforcing role, effectively reducing the damage to the waterproof membrane caused by base layer cracking when the membrane is laid on the structural layer or insulation layer, and improving the ability of the modified bitumen waterproof membrane to resist external force damage. The material of the reinforcing base layer 3 can be selected from any one of polyester base, glass fiber base, or glass fiber reinforced polyester base, and the tensile strength meets the performance requirements of GB 18242-2008 "Elastomer Modified Bitumen Waterproof Membrane", which can effectively reduce the damage to the waterproof membrane caused by base layer cracking when the waterproof membrane is laid on the structural layer or insulation layer.

[0034] According to an embodiment of this utility model, the vapor barrier layer 5 is an extensible film, primarily imparting extensibility to the waterproof membrane, enabling it to adapt to deformation or cracking of the structural layer or insulation layer, thus ensuring the waterproof performance of the waterproof membrane. In this utility model, the extensible film of the vapor barrier layer 5 is selected from either polypropylene or polyethylene. Furthermore, this vapor barrier layer 5 can also block the impact and influence of the lower insulation layer or interior structural layer on the upper modified asphalt layer under the action of water vapor pressure, reducing the aging rate of the modified asphalt and extending its service life.

[0035] According to an embodiment of this utility model, a self-adhesive modified bitumen layer 6 is provided below the vapor barrier layer 5 for bonding with the insulation board or roof structural layer. The self-adhesive modified bitumen layer 6 consists of multiple spaced-apart bitumen strips 601. The bitumen strips 601 at both ends serve as overlap edges and are bonded to the second modified bitumen layer 4. Any two adjacent bitumen strips 601 between the overlap edges form a channel 7 with the vapor barrier layer 5 for venting water vapor. In this utility model, the self-adhesive modified bitumen layer 6 adopts a strip design, with the width of the bitumen strips 601 at both ends serving as overlap edges being 5-12cm, preferably 10cm, for overlapping between two sheets of waterproof membrane. By setting the bitumen layer between the overlap edges into multiple arrayed bitumen strips 601, it is easier to form a channel 7 for venting steam between the bitumen strips 601 between the overlap edges and the vapor barrier layer 5, maintaining a dynamic balance between the waterproof insulation system and the surrounding environment, improving the safety and durability of the roof waterproof insulation system; it can also promptly vent water vapor accumulated in the insulation layer or structural layer (such as...). Figure 2As shown, this reduces the impact on the surface modified bitumen layers (such as the first modified bitumen layer 2 and the second modified bitumen layer 4), extending the service life of the waterproof membrane. The bitumen strips 601 between the overlapping edges have widths of 5-10 cm each, either the same or different, and the spacing between the bitumen strips 601 is 5-10 cm. Furthermore, in this embodiment, the vapor barrier layer 5 is disposed between the overlapping edges and its width is smaller than that of the self-adhesive modified bitumen layer 6. The structural design of directly bonding the overlapping edges of the self-adhesive modified bitumen layer 6 to the second modified bitumen layer 4, while allowing water vapor to escape, also helps to further improve the waterproof sealing performance of the vapor channel type modified bitumen waterproof membrane through the overlapping edge design.

[0036] According to embodiments of this utility model, the thickness of the first modified bitumen layer 2 and the second modified bitumen layer 4 may be the same or different, ranging from 1.0mm to 2.5mm, preferably 1.5mm to 2.5mm, to ensure waterproof performance; the thickness of the reinforcing base layer 3 is 0.3-0.35mm, providing certain support, strength, and hardness for the waterproof membrane; the thickness of the vapor barrier layer 5 is 0.3mm-0.5mm, making it less prone to breakage and possessing good deformation capacity; the thickness of the self-adhesive modified bitumen layer 6 is 0.6mm-1.0mm, enabling adhesion to the structural layer or insulation layer and preventing it from easily falling off; the thickness of the silicone-coated isolation membrane 8 is 25-45μm, protecting the waterproof membrane while facilitating removal during construction. Therefore, the total thickness of the vapor channel type modified bitumen waterproof membrane of this utility model is 3.5-5.5mm.

[0037] The following detailed description of the structure and effects of the steam-channel type modified bitumen waterproof membrane of this utility model, with reference to specific embodiments, is provided below.

[0038] Example 1

[0039] Adopting such Figure 1 The structure shown is used to manufacture a vapor channel type modified bitumen waterproof membrane. The surface isolation layer 1 is made of LDPE film with a thickness of 10μm. The first modified bitumen layer 2 and the second modified bitumen layer 4 are made of the same material, SBS modified bitumen, with a high temperature resistance of 90℃ and a thickness of 1.0mm each. The reinforcing base layer 3 uses 250g polyester, with a tensile strength ≥800N / 50mm and an elongation ≥40%. The vapor barrier layer 5 is a PE film with a thickness of 20μm. The self-adhesive modified bitumen layer 6 meets the performance requirements of Type I of GB 23441-2009 "Self-adhesive Polymer Modified Bitumen Waterproof Membrane", with a coating thickness of 0.8mm. The width of the two ends (i.e., the overlap edges) of the self-adhesive modified bitumen strip 601 is 10cm, the width of the middle bitumen strip 601 is 5~10cm, and the spacing between any two adjacent bitumen strips 601 forming the channel 7 is 5cm. The silicone-coated isolation base film is a 35μm thick PE silicone-coated isolation film. Therefore, the total thickness of the steam-channel type modified bitumen waterproof membrane is 4.0 mm.

[0040] Example 2

[0041] Adopting such Figure 1 The structure shown is used to fabricate a vapor channel type modified bitumen waterproof membrane. The upper surface of the waterproof membrane (i.e., surface isolation layer 1) is a layer of 70-mesh fine sand. The first modified bitumen layer 2 and the second modified bitumen layer 4 are made of the same material, SBS modified bitumen, with a high temperature resistance of 105℃. The thickness of the first modified bitumen layer 2 is 1.2mm (increasing the thickness increases the embedding of the fine sand and improves its adhesion), and the thickness of the second modified bitumen layer 4 is 1.0mm. The reinforcing base layer 3 uses 250g polyester, with a tensile strength ≥800N / 50mm and an elongation ≥40%. The vapor barrier layer 5 is a PP film with a thickness of 20μm. The self-adhesive modified bitumen layer 6 conforms to GB standards. According to the performance requirements of Type I of 23441-2009 "Self-adhesive Polymer Modified Bituminous Waterproofing Membrane", the coating thickness is 0.8mm, the width of the two ends (i.e., the overlap edge) of the self-adhesive modified bituminous strip 601 is 10cm, the width of the middle bituminous strip 601 is 5~10cm, and the spacing of the channel 7 formed between any two adjacent bituminous strips 601 is 5cm; the material of the silicone-coated isolation membrane 8 is a 30μm thick PP silicone-coated isolation membrane. Therefore, the total thickness of the vapor channel type modified bituminous waterproofing membrane is 5.0mm.

[0042] Furthermore, the water vapor transmission rate and elongation of the steam channel type modified bitumen waterproof membrane in the above embodiments were tested, and the specific test results are shown in Table 1.

[0043] Table 1

[0044]

[0045] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A steam-channel type modified bitumen waterproof membrane, characterized in that, The steam-channel type modified bitumen waterproof membranes described above include: Surface isolation layer, first modified asphalt layer, reinforced base course, second modified asphalt layer, vapor barrier layer, self-adhesive modified asphalt layer; The width of the vapor barrier layer is smaller than the width of the self-adhesive modified asphalt layer. The self-adhesive modified asphalt layer is composed of multiple asphalt strips spaced apart from each other. The asphalt strips at both ends serve as overlapping edges and are bonded to the second modified asphalt layer. The vapor barrier layer is located in the middle of the overlapping edges, and any two adjacent asphalt strips form a channel with the vapor barrier layer for the discharge of water vapor.

2. The steam-channel type modified bitumen waterproof membrane according to claim 1, characterized in that, Also includes: A silicone-coated release film bonded to the self-adhesive modified bitumen layer.

3. The steam-channel type modified bitumen waterproof membrane according to claim 2, characterized in that, The surface isolation layer, the first modified asphalt layer, the reinforced base layer, the second modified asphalt layer, and the self-adhesive modified asphalt layer have the same width.

4. The steam-channel type modified bitumen waterproof membrane according to claim 3, characterized in that, The width of the silicone-coated isolation base film is 30mm-50mm wider than the width of the self-adhesive modified asphalt layer.

5. The steam-channel type modified bitumen waterproof membrane according to claim 1, characterized in that, The width of the overlapping edge is 5-12cm, the width of the asphalt strips between the overlapping edges is the same or different and is 5-10cm each, and the spacing between the asphalt strips is 5-10cm.

6. The steam-channel type modified bitumen waterproof membrane according to claim 2, characterized in that, The total thickness of the steam-channel type modified bitumen waterproof membrane is 3.5-5.5 mm.

7. The steam-channel type modified bitumen waterproof membrane according to claim 1 or 6, characterized in that, The vapor barrier is an elongated film with a thickness of 0.3-0.5 mm.

8. The steam-channel type modified bitumen waterproof membrane according to claim 6, characterized in that, The first modified asphalt layer and the second modified asphalt layer may have the same or different thicknesses, ranging from 1.0 mm to 2.5 mm. The thickness of the self-adhesive modified asphalt layer is 0.6mm-1.0mm.

9. The steam-channel type modified bitumen waterproof membrane according to claim 2 or 6, characterized in that, The thickness of the silicon-coated isolation substrate is 25-45 μm.

10. The steam-channel type modified bitumen waterproof membrane according to claim 7, characterized in that, The vapor barrier is selected from either polypropylene or polyethylene film.

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