Pre-laid waterproof coiled material and waterproof coiled material lap joint structure

Abstract

The utility model discloses a pre-laid waterproof coiled material and a waterproof coiled material lap joint structure, wherein the pre-laid waterproof coiled material does not contain a reserved long edge lap joint edge and can be bonded with post-pouring concrete. The waterproof coiled material comprises an anti-sticking and anti-sticking layer, an anti-sticking hot melt adhesive layer, a waterproof main body layer, a self-adhesive layer and a release film layer which are arranged in sequence; the anti-sticking hot melt adhesive layer is completely covered by the anti-sticking layer; the anti-sticking hot melt adhesive layer and the self-sticking adhesive layer are respectively and independently made of modified asphalt mastic; or the anti-sticking hot melt adhesive layer and the self-sticking adhesive layer are respectively and independently made of non-asphalt base adhesive. Compared with the prior art, the anti-sticking and anti-sticking layer of the waterproof roll is not provided with a reserved long-edge self-sticking overlapping edge area, the problem of special treatment of the overlapping edge does not need to be considered in the production process, the release film of the overlapping edge does not need to be additionally torn off in the construction process, the laying direction and position of the roll do not need to be specially designed in the construction process, and the construction efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of waterproof roll materials, and more specifically, relates to a pre-laid waterproof roll material and a waterproof roll material overlap structure which can be bonded to post-cast concrete and does not contain a reserved long side overlap edge. Background Art

[0002] Rolls that can be bonded to post-cast concrete usually have a reserved self-adhesive lap edge area in the long direction of the roll, which has a different initial adhesion from the large surface area that can be bonded to post-cast concrete (such as Figure 1 and 2 The overlapping edge area is required to have good initial adhesion, and it is required that after the release film in this area is torn off, it can be bonded to the long side of another roll material to form a complete and continuous waterproof system; the area bonded to the post-poured concrete is required to have no adhesion or very weak adhesion to other contact objects before pouring concrete, so as not to affect the movement of construction personnel and equipment on the roll material. This requires that the long side overlapping area and the area bonded to the post-poured concrete be processed separately during the production process, and during the construction process, the two rolls are required to be aligned on the long sides to ensure that the reserved overlapping edge is fully bonded to the bonded area, that is, the long side without the reserved overlapping edge must overlap and bond with the long side with the reserved overlapping edge to form overlapping edge bonding (such as Figure 4 The short side overlap area also needs to be specially processed for overlap (for example, using double-sided tape for overlap). This roll material structure makes the roll material production process complicated and requires a high degree of construction accuracy. Summary of the invention

[0003] The utility model aims to provide a pre-laid waterproofing membrane which can be bonded to post-cast concrete and does not contain a reserved long side overlap. The waterproofing membrane has no reserved long side self-adhesive overlap area on the anti-adhesive layer. There is no need to consider the special treatment of the overlap during the production process, and there is no need to tear off the overlap release film during the construction process. There is no need to specially design the membrane laying direction and position during the construction process, thereby improving the construction efficiency.

[0004] In order to achieve the above-mentioned object, the utility model provides a pre-laid waterproofing membrane without a reserved long side overlap edge that can be bonded to post-cast concrete, the waterproofing membrane comprising: an anti-adhesive layer, an anti-adhesive hot melt adhesive layer, a waterproof main body layer, a self-adhesive layer and a release film layer arranged in sequence;

[0005] The anti-adhesive hot melt adhesive layer is completely covered by the anti-adhesive anti-adhesive layer;

[0006] The materials of the anti-stick hot melt adhesive layer and the self-adhesive layer are independently modified asphalt adhesive; or the materials of the anti-stick hot melt adhesive layer and the self-adhesive layer are independently non-asphalt-based adhesive.

[0007] like Figure 1 and 2 As shown, the anti-sticking hot melt adhesive layer is not completely covered by the anti-sticking anti-sticking layer, and a reserved long side overlapping area is also provided on the anti-sticking hot melt adhesive layer, and an overlapping side release film is directly provided on the reserved long side overlapping area; however, compared with the prior art, in the present invention, the anti-sticking hot melt adhesive layer is completely covered by the anti-sticking anti-sticking layer.

[0008] In the utility model, the materials of the anti-stick hot melt adhesive layer and the self-adhesive layer are each independently modified asphalt adhesive or each independently non-asphalt-based adhesive; the materials of the anti-stick hot melt adhesive layer and the self-adhesive layer can have long-term compatibility, and there will be no decrease in the cohesion of the adhesive layer due to the migration of small molecules, thereby reducing the peel strength of the overlapping edges.

[0009] The peel strength of the overlapped edge of the utility model is tested according to the GB 328.21 test method after being heat treated at 70° C. for 14 days after bonding, and the average force is greater than 0.8 N / mm.

[0010] According to the utility model, preferably, the material of the anti-sticking and anti-adhesive layer is selected from water-based polyurethane coating, water-based acrylic coating, water-based polyvinyl acetate coating or silane-modified polymer coating.

[0011] According to the utility model, preferably, the corona value of the anti-sticking and anti-adhesive layer is higher than 38 dynes.

[0012] According to the utility model, preferably, the thickness of the anti-sticking and anti-adhesive layer is 0.5-500 microns, more preferably 0.5-100 microns, and most preferably 0.5-50 microns.

[0013] In the present invention, preferably, the gram weight range of the anti-sticking and anti-adhesive layer is 0.5g / sqm-500g / sqm; more preferably, it is 5g / sqm-200g / sqm.

[0014] In the utility model, the waterproof main body layer provides physical strength, toughness and a continuous waterproof layer for the coiled material. The waterproof main body layer has a flat surface and can be a homogeneous film or a multi-layer composite film selected from blown film, cast film, extruded sheet, woven material, non-woven fabric and laminated fabric. Preferably, when the waterproof main body layer is a single-layer homogeneous film, the material of the single-layer homogeneous film is a polyolefin homopolymer, a polyolefin copolymer, an ethylene-vinyl acetate copolymer, polyvinyl chloride, polyester, polyamide or polyurethane;

[0015] When the waterproof main layer is a multi-layer composite film, the material of each layer of the multi-layer composite film is independently polyolefin homopolymer, polyolefin copolymer, ethylene-vinyl acetate copolymer, polyvinyl chloride, polyester, polyamide or polyurethane.

[0016] In the present invention, when the waterproof main body layer is a multi-layer composite film, the materials of each layer of the multi-layer composite film can be the same or different.

[0017] In the present invention, preferably, the waterproof main body layer is a single-layer homogeneous film, and the material of the single-layer homogeneous film is polyethylene.

[0018] In the present invention, the weight average molecular weight of polyethylene is preferably 50,000 to 8,000,000; the higher the molecular weight, the better the impact resistance of the polyolefin material.

[0019] According to the utility model, preferably, the thickness of the waterproof main body layer is 0.05-2.0 mm, preferably 0.1-1.5 mm.

[0020] According to the utility model, preferably, the non-asphalt-based adhesive is a styrene block copolymer hot melt pressure-sensitive adhesive, butyl adhesive, acrylic pressure-sensitive adhesive, silane-modified polymer pressure-sensitive adhesive or polyurethane pressure-sensitive adhesive;

[0021] The modified asphalt adhesive is a polymer modified asphalt self-adhesive adhesive.

[0022] In the present invention, the modified asphalt adhesive can be any conventional modified asphalt adhesive with self-adhesive properties in the art, for example, it can be a polymer modified asphalt self-adhesive adhesive prepared according to the method of the embodiment of CN101121874A.

[0023] According to the utility model, preferably, the thickness of the anti-adhesive hot melt adhesive layer and the self-adhesive layer are independently 0.1-1.5 mm.

[0024] The roll material of the utility model can be fully bonded or partially bonded to the base layer or another waterproof layer. At the same time, the overlapping edges are bonded to each other by a self-adhesive layer and an anti-adhesive layer. This bonding method is suitable for long-side overlap, short-side overlap and detailed overlap areas. The roll material can also be directly cut into any shape for repair or cover use.

[0025] In the utility model, the anti-sticking and anti-adhesive layer also has the following performance characteristics: it can be bonded with post-cast concrete, has no cracking after being exposed to sunlight, is resistant to being stepped on by construction workers, does not stick to feet when stepped on, is resistant to hydrolysis, and after being bonded with post-cast concrete, can withstand long-term immersion in water and maintain good bonding performance.

[0026] In the present invention, preferably, a coating-specific film is optionally provided on the anti-sticking and anti-adhesive layer, and a release coating is optionally provided between the anti-sticking and anti-adhesive layer and the coating-specific film.

[0027] In the present invention, as a preferred embodiment, the preparation method of the waterproof coiled material of the present invention is as follows:

[0028] (1) Extruding the main waterproof layer.

[0029] (2) The anti-sticking coating is pre-coated on a coating-specific film by spraying, roller coating or blade coating. The coating-specific film can be at least one homogeneous film or a multi-layer composite film selected from polyethylene, polypropylene, polyvinyl chloride, copolymers of vinyl acetate and olefins, polyethylene terephthalate, polyamide, non-woven fabrics, and paper.

[0030] (3) The coating-specific film may have a release coating or may not have a release coating on the side coated with the anti-sticking and anti-adhesive coating.

[0031] (4) The anti-stick hot melt adhesive layer is coated on one side (side A) of the waterproof main layer, and then the pre-coated anti-stick anti-adhesive layer is directly pasted on the anti-stick hot melt adhesive layer. The coating special film can be separated from the coating or not.

[0032] (5) The self-adhesive layer is coated on the release film, and then the self-adhesive layer is laminated with the other side (side B) of the waterproof main body layer with the anti-adhesive layer to form the composite waterproof roll material of the utility model.

[0033] Another aspect of the present invention provides a waterproof roll material overlap structure, the waterproof roll material overlap structure comprising at least two overlapped waterproof roll materials;

[0034] Wherein, the self-adhesive layer of any one of the waterproof rolls is overlapped on the anti-adhesive layer of the adjacent waterproof roll.

[0035] In the present invention, preferably, the overlapping waterproof coiled materials are overlapped at long sides or overlapped at short sides.

[0036] According to the utility model, preferably, the overlapping width of two adjacent waterproof membranes is greater than 8 cm.

[0037] In the utility model, the anti-sticking and anti-sticking layer can be bonded to the self-adhesive layer, and the bonding mechanism can be that the self-adhesive layer wets the anti-sticking and anti-sticking coating to form a good bond therewith, or the self-adhesive layer infiltrates the anti-sticking and anti-sticking coating, and the self-adhesive layer further penetrates and forms an integral bond with the anti-sticking hot melt adhesive layer. Both bonding structures have the characteristics of anti-lateral water leakage and good bonding performance after long-term immersion in water.

[0038] The two long sides of the coiled material of the utility model have the same structure. When overlapping, any long side of one coiled material and any long side of another coiled material are bonded to form an overlapping edge. During the construction process, there is no need to specially design the laying direction and position of the coiled material. As long as the two coiled materials have a sufficient width overlap area (the overlap width is preferably more than 8 cm), they can be bonded to form an overlapping area.

[0039] The technical solution of the utility model has the following beneficial effects: the waterproofing roll material of the utility model can simplify the production process and improve production efficiency. During the construction process, no other auxiliary materials (such as double-sided tape, single-sided tape and cover strip) are required to complete the entire construction, and there is no need to remove the additional overlapping edge release film (referring to Figure 1 , 2 , 4, number 6), there is no need to consider the direction and position of the unrolling start of the coil, the two long sides of the coil have the same structure, and when overlapping, any long side of one coil is bonded to any long side of the other coil to form an overlapping edge. During the construction process, there is no need to specially design the laying direction and position of the coil, as long as the two coils have a sufficient width overlap area, they can be bonded to form an overlapping area; simplifying the construction process.

[0040] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0042] Figure 1 A schematic diagram of a prior art three-layer waterproofing membrane with long-side overlapping edges is shown.

[0043] Figure 2 A schematic diagram of a prior art five-layer waterproofing membrane with long-side overlapping edges is shown.

[0044] Figure 3 A schematic diagram of a pre-laid waterproof membrane bonded to post-cast concrete without a reserved long-side overlap according to an embodiment of the utility model is shown.

[0045] Figure 4 A schematic diagram of overlapping of a five-layer waterproof membrane with long overlapping edges in the prior art is shown.

[0046] Figure 5 A schematic diagram of the overlap of a pre-laid waterproof membrane that can be bonded to post-cast concrete and does not contain a reserved long-side overlap edge according to an embodiment of the utility model is shown.

[0047] Description of reference numerals:

[0048] 1. Anti-sticking layer 2. Anti-sticking hot melt adhesive layer 3. Waterproof main layer 4. Self-adhesive layer 5. Release film layer 6. Overlap edge release film DETAILED DESCRIPTION

[0049] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0050] In the following examples and comparative examples, the polymer-modified asphalt self-adhesive is a polymer-modified asphalt self-adhesive prepared according to the method of Example 1 of CN101121874A.

[0051] Examples 1-4

[0052] like Figure 3 As shown, this embodiment provides a pre-laid waterproofing membrane that can be bonded to post-cast concrete without a reserved long side overlap, and the waterproofing membrane comprises: an anti-adhesive layer 1, an anti-adhesive hot melt adhesive layer 2, a waterproof main body layer 3, a self-adhesive layer 4 and a release film layer 5 arranged in sequence; the anti-adhesive hot melt adhesive layer 2 is completely covered by the anti-adhesive layer 1; the material and thickness of the anti-adhesive hot melt adhesive layer 2 and the self-adhesive layer 4 are specifically shown in Table 1;

[0053] The material of the anti-sticking and anti-adhesive layer 1 is water-based polyurethane coating, specifically Oriental Yuhong GES-W308 single-component water-based polyurethane; the corona value of the anti-sticking and anti-adhesive layer is 42 dynes; and the thickness of the anti-sticking and anti-adhesive layer is 40 microns.

[0054] The waterproof main body layer 3 is a single-layer homogeneous film, and the material of the single-layer homogeneous film is high-density polyethylene; the thickness of the waterproof main body layer 3 is 0.8 mm.

[0055] The specific preparation process is as follows:

[0056] Extruded waterproof main body layer 3, 0.8mm high-density polyethylene sheet.

[0057] The commercially available water-based paint Oriental Yuhong GES-W308 single-component water-based polyurethane was selected. The coating weight was 50g / square meter; it was coated on a special coating film;

[0058] The anti-stick hot melt adhesive layer 2 is coated on one side (denoted as side A) of the waterproof main layer 3, and then the pre-coated anti-stick anti-adhesive layer 1 is directly pasted on the anti-stick hot melt adhesive layer 2, and finally the coating special film is separated from the anti-stick anti-adhesive layer.

[0059] The self-adhesive layer 4 is coated on a 0.03 mm thick PET release film 5 coated with silicone oil on one side, and then the self-adhesive layer 4 is composited with the other side (denoted as side B) of the waterproof main layer 3 with an anti-sticking layer to form a composite waterproof roll with a five-layer structure.

[0060] Comparative Example 1

[0061] The preparation method of this comparative example is the same as that of Example 1, the only difference being that the material of the self-adhesive layer is polymer-modified asphalt self-adhesive with a thickness of 0.5 mm; see Table 1 for details.

[0062] Comparative Example 2

[0063] The preparation method of this comparative example is the same as that of Example 4, except that the material of the anti-adhesive hot melt adhesive layer is butyl rubber and the thickness is 0.3 mm; see Table 1 for details.

[0064] Table 1

[0065]

[0066]

[0067] Test Case

[0068] The performance of the above embodiments and comparative examples were tested, and the specific test results are shown in Table 2;

[0069] Among them, according to the national standard GB / T 23457-2017 test method, the bonding with the post-cast concrete (no treatment, heat treatment, UV treatment, immersion treatment) and the peeling strength after immersion in water with the post-cast concrete for 28 days were tested.

[0070] Overlap edge bonding strength test method:

[0071] No treatment: self-adhesive layer is bonded to anti-sticking layer, the bonding area is 50mm*75mm, bonding and curing is carried out at 23℃ for 24h, and the test is carried out according to GB 328.21 test method, and the average force is recorded.

[0072] Heat treatment: The self-adhesive layer is bonded to the anti-adhesive layer, with a bonding area of ​​50mm*75mm. The bonded sample is then placed in a 70℃ oven for 14 days. After being taken out, it is placed at 23℃ room temperature for 24 hours. The test is performed according to the GB 328.21 test method, and the average force is recorded.

[0073] Water immersion treatment: The self-adhesive layer is bonded to the anti-adhesive layer, with a bonding area of ​​50mm*75mm. The bonded sample is then immersed in water for 14 days, taken out and placed at room temperature of 23℃ for 24 hours, and tested according to the test method of GB 328.21, and the average force is recorded.

[0074] Table 2

[0075]

[0076]

[0077] It can be seen from the test results in Table 2 that the self-adhesive layer and the reverse-adhesive hot melt adhesive layer of Examples 1-3 are both polymer self-adhesives with good compatibility. The bonding performance is good after no treatment, heat treatment and 14 days of immersion in water after the overlapping edges are bonded. The reverse-adhesive hot melt adhesive layer and the self-adhesive layer of Comparative Examples 1 and 2 are polymer adhesive and polymer modified asphalt self-adhesive, respectively. The initial bonding strength and bonding strength after immersion in water are both more than 1N / mm, and the bonding strength after heat treatment is lower than 1N / mm, which is manifested as the oil in the polymer modified asphalt self-adhesive migrates to the polymer adhesive, dissolving the polymer adhesive and sharply reducing the cohesive force, resulting in a lower peel force. The self-adhesive layer and the reverse-adhesive hot melt adhesive layer of Example 4 are both polymer modified asphalt, which have good compatibility.

[0078] From the above results, it can be seen that in order to ensure the peel strength of the overlapping edge bonding and the reliability of the waterproof system, the selection of the self-adhesive layer and the reverse-adhesive hot-melt adhesive layer needs to be verified in the early stage of product design to ensure good compatibility between the two.

[0079] Example 5

[0080] like Figure 5 As shown, this embodiment provides a waterproof roll overlapping structure, which comprises two overlapping waterproof rolls of embodiment 1;

[0081] Wherein, the self-adhesive layer 4 of any one of the waterproof rolls is overlapped on the anti-adhesive layer 1 of the adjacent waterproof roll.

[0082] The overlapping width of two adjacent waterproof membranes is more than 8 cm.

[0083] Usually, during the overlapping construction, the release film layer 5 of the waterproof roll material overlapping with the anti-sticking and anti-adhesive layer 1 is removed to expose the self-adhesive layer 4 to achieve overlapping.

[0084] The various embodiments of the utility model have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A pre-laid waterproofing membrane, which does not contain a reserved long side overlap edge and can be bonded to post-cast concrete, characterized in that: The waterproof coiled material comprises: an anti-adhesive layer, an anti-adhesive hot melt adhesive layer, a waterproof main body layer, a self-adhesive layer and a release film layer which are arranged in sequence; The anti-adhesive hot melt adhesive layer is completely covered by the anti-adhesive anti-adhesive layer; The materials of the anti-stick hot melt adhesive layer and the self-adhesive layer are independently modified asphalt adhesive; or the materials of the anti-stick hot melt adhesive layer and the self-adhesive layer are independently non-asphalt-based adhesive.

2. The waterproof coiled material according to claim 1, characterized in that: The material of the anti-sticking and anti-adhesive layers is selected from water-based polyurethane coatings, water-based acrylic coatings, water-based polyvinyl acetate coatings or silane-modified polymer coatings.

3. The waterproof coiled material according to claim 1, characterized in that: The corona value of the anti-sticking layer is higher than 38 dynes.

4. The waterproof coiled material according to claim 1, characterized in that: The thickness of the anti-sticking layer is 0.5-500 microns.

5. The waterproof coiled material according to claim 1, characterized in that: When the waterproof main body layer is a single-layer homogeneous film, the material of the single-layer homogeneous film is polyolefin homopolymer, polyolefin copolymer, ethylene-vinyl acetate copolymer, polyvinyl chloride, polyester, polyamide or polyurethane; When the waterproof main layer is a multi-layer composite film, the material of each layer of the multi-layer composite film is independently polyolefin homopolymer, polyolefin copolymer, ethylene-vinyl acetate copolymer, polyvinyl chloride, polyester, polyamide or polyurethane.

6. The waterproof coiled material according to claim 1, characterized in that: The thickness of the waterproof main body layer is 0.05-2.0 mm.

7. The waterproof coiled material according to claim 1, characterized in that: The non-asphalt-based adhesive is a styrene block copolymer hot melt pressure-sensitive adhesive, butyl adhesive, acrylic pressure-sensitive adhesive, silane-modified polymer pressure-sensitive adhesive or polyurethane pressure-sensitive adhesive; The modified asphalt adhesive is a polymer modified asphalt self-adhesive adhesive.

8. The waterproof coiled material according to claim 1, characterized in that: The thickness of the anti-adhesive hot melt adhesive layer and the self-adhesive layer are independently 0.1-1.5 mm.

9. A waterproof roll material overlap structure, characterized in that: The waterproof roll overlapping structure comprises at least two overlapping waterproof rolls according to any one of claims 1 to 8; Wherein, the self-adhesive layer of any one of the waterproof rolls is overlapped on the anti-adhesive layer of the adjacent waterproof roll.

10. The waterproof coiled material overlap structure according to claim 9, characterized in that: The overlapping width of two adjacent waterproof membranes is more than 8 cm.

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