TPO composite waterproof coiled material

Abstract

The invention relates to the field of waterproof coiled materials, and discloses a TPO composite waterproof coiled material, which comprises a surface layer structure and an inner layer structure, the inner layer structure comprises a TPO material layer, an aerogel layer and an adhesive layer which are sequentially arranged in a stacked mode, and the breadth of the aerogel layer is smaller than that of the TPO material layer so that side edges can be reserved on the two sides of the TPO material layer. The surface layer structure is a polymer film layer and is positioned on the surface of one side of the inner layer structure; and the polymer film layer covers the two side edges of the TPO material layer in the inner layer structure and covers the adhesive layer. The TPO composite waterproof coiled material can effectively reduce the contact probability of the inner layer structure and the external environment, so that the overall durability of the product is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of waterproofing membranes, in particular to a TPO composite waterproofing membrane. BACKGROUND

[0002] TPO material is a thermoplastic polyolefin elastomer material. Due to the simple structure of the molecular chain and the low content of tertiary carbon, it not only has good chemical stability, but also has good processing performance of plastic, and the processing and molding of TPO material can be realized by using conventional equipment.

[0003] The above excellent performance makes TPO material a new type of material with good application prospect. At present, TPO material is widely used in many scenes in the waterproofing field, one of which is roof waterproofing.

[0004] With the development of the photovoltaic industry and the promulgation and implementation of GB 55030-2022, clear requirements are put forward for the flame retardant performance of TPO waterproofing membranes. In addition, with the continuous improvement of market demand, the requirements for roof waterproofing are also getting higher and higher, such as requiring waterproofing while achieving thermal insulation function, etc.

[0005] However, TPO material itself is a flammable material, and the TPO waterproofing membranes on the market currently need to be used in combination with rock wool and other materials during construction, which is relatively complex.

[0006] In addition, TPO waterproofing membranes are used outdoors and exposed to light, air, heat and other environmental factors, and the material is prone to aging.

[0007] CN207362130U discloses a TPO waterproofing membrane with heat insulation function. The TPO waterproofing membrane includes a TPO material layer, an upper hot melt adhesive layer, a heat insulation adhesive blanket layer, a lower hot melt adhesive layer and a separation film layer arranged in sequence. The waterproofing membrane provided by the prior art has both waterproofing and heat insulation functions, but in the face of outdoor use environment, small molecules inside the adhesive layer of the waterproofing membrane are prone to be precipitated, resulting in a decrease in the adhesive ability of the adhesive layer and the structure between different layers is prone to fall off.

[0008] Therefore, it is of great significance to develop a TPO waterproofing membrane that is easy to construct and has good flame retardant, thermal insulation and aging resistance performance. SUMMARY

[0009] The purpose of the present application is to overcome the problems of complex construction and poor aging resistance of the waterproofing membrane in the prior art.

[0010] In order to achieve the above purpose, the present application provides a TPO composite waterproofing membrane, which comprises a surface layer structure and an inner layer structure.

[0011] The inner layer structure comprises a TPO material layer, an aerogel layer and a viscose layer which are sequentially stacked, the width of the aerogel layer and the viscose layer is equal, and the width of the aerogel layer is smaller than the width of the TPO material layer so that side edges are left on both sides of the TPO material layer;

[0012] The surface layer structure is a polymer film layer which is located on one side surface of the inner layer structure, and the polymer film layer covers the two side edges of the TPO material layer in the inner layer structure and covers the viscose layer; the edge of the polymer film layer which is attached to the TPO material layer is provided with a texture structure, and the texture structure comprises at least two textures.

[0013] Preferably, the width of the aerogel layer is 97%-99% of the width of the TPO material layer.

[0014] Preferably, the thickness of the TPO material layer is 0.6-1.5mm, and the thickness of the aerogel layer is 0.5-2mm.

[0015] Preferably, the thickness of the viscose layer is 0.15-0.25mm, and the thickness of the polymer film layer is 0.02-0.5mm.

[0016] Preferably, the texture structure comprises a first texture and a second texture which is distributed in an axial symmetry around the first texture as a central axis.

[0017] Preferably, the second texture is in a continuous zigzag distribution.

[0018] Preferably, the second texture comprises a plurality of circular arc units which are arranged in a circular arc shape, and adjacent circular arc units are sequentially connected.

[0019] Preferably, the aerogel layer is a silica aerogel felt.

[0020] Preferably, the material forming the viscose layer is a hot melt adhesive layer and / or a butyl adhesive layer.

[0021] Preferably, the width of the TPO material layer is 1990-2010mm.

[0022] The application uses a TPO material layer as a main material, realizes organic attachment through a viscose layer and an aerogel layer with heat preservation performance, and externally assists a polymer film layer as a high-temperature resistant protective layer, and the two side edges of the TPO material layer are provided with a texture structure, thereby realizing the fusion bonding of the polymer film layer and the TPO material layer.

[0023] The TPO composite waterproof membrane provided by this invention is easy to construct and can effectively reduce the probability of contact between the components in its internal structure and water vapor, oxygen and other substances in the air, thereby improving the flame retardant, heat insulation and aging resistance of the TPO composite waterproof membrane.

[0024] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the cross-sectional structure of a preferred TPO composite waterproof membrane provided by the present invention;

[0026] Figure 2 This is a schematic diagram of the texture structure of a preferred TPO composite waterproof membrane provided by the present invention.

[0027] Figure 3 This is a schematic diagram of the texture structure of another preferred TPO composite waterproof membrane provided by the present invention.

[0028] Explanation of reference numerals in the attached figures

[0029] 1. TPO material layer; 2. Aerogel layer; 3. Adhesive layer; 4. Polymer film layer; 5. Texture structure; 51. First texture; 52. Second texture. Detailed Implementation

[0030] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0031] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0032] As mentioned above, see Figures 1-3 The present invention provides a TPO composite waterproof membrane, which includes a surface structure and an inner structure;

[0033] The inner layer structure includes a TPO material layer 1, an aerogel layer 2, and an adhesive layer 3 stacked sequentially. The widths of the aerogel layer 2 and the adhesive layer 3 are equal, and the width of the aerogel layer 2 is smaller than the width of the TPO material layer 1 so that the TPO material layer 1 has side edges on both sides.

[0034] The surface structure is a polymer film layer 4, located on one side surface of the inner layer structure; and the polymer film layer 4 covers the two sides of the TPO material layer 1 in the inner layer structure and covers the adhesive layer 3; the polymer film layer 4 and the TPO material layer 1 are bonded together with a textured structure 5, and the textured structure 5 includes at least two textures.

[0035] It should be noted that, Figure 1 The "first direction" in the text refers to the direction that is parallel to the cross-section of the TPO composite waterproof membrane; Figure 2 and Figure 3 The "second direction" in Figure 1 The "first direction" in the diagram is perpendicular to each other.

[0036] The inventors of this invention have discovered that applying the TPO composite waterproof membrane provided by this invention to roof waterproofing projects is convenient for construction and can effectively improve the flame retardant, heat insulation and aging resistance of the waterproof membrane.

[0037] Preferably, the width of the aerogel layer 2 is 97%-99% of the width of the TPO material layer 1.

[0038] In one specific embodiment of the present invention, the aerogel layer 2 and the adhesive layer 3 are positioned such that the two sides of the TPO material layer 1 are symmetrically distributed around the center of the TPO material layer 1. The inventors of the present invention have found that this preferred configuration facilitates construction operations.

[0039] Preferably, the thickness of the TPO material layer 1 is 0.6-1.5 mm; and the thickness of the aerogel layer 2 is 0.5-2 mm. Exemplarily, in one specific embodiment of the present invention, the thickness of the TPO material layer 1 is 1 mm; and the thickness of the aerogel layer 2 is 1.5 mm.

[0040] Preferably, the thickness of the adhesive layer 3 is 0.15-0.25 mm; and the thickness of the polymer film layer 4 is 0.02-0.5 mm. Exemplarily, in one specific embodiment of the present invention, the thickness of the adhesive layer 3 is 0.25 mm; and the thickness of the polymer film layer 4 is 0.15 mm.

[0041] In a preferred embodiment, the TPO material layer 1 is a homogeneous TPO sheet or a TPO sheet reinforced with a mesh fabric.

[0042] Preferably, the texture structure 5 includes a first texture 51 and a second texture 52 that is axially symmetrically distributed with the first texture 51 as the central axis.

[0043] In a preferred embodiment, the second texture 52 has a continuous serrated distribution.

[0044] The present invention does not impose any particular requirements on the angle of the serration distribution, and those skilled in the art can select it as needed. Exemplarily, in some specific embodiments of the present invention, the minimum angle of the serration is 60-90°, for example, it can be 60°, 70°, 80° and 90°.

[0045] According to another preferred embodiment, the second texture 52 includes a plurality of arc units arranged in an arc shape, and adjacent arc units are connected in sequence.

[0046] Preferably, the aerogel layer 2 is a silica aerogel felt.

[0047] In some specific embodiments of the present invention, the density of the silica aerogel felt is 100-120 kg / m³. 3 The maximum tensile strength is 300-400 N / cm. The inventors of this invention have discovered that, under this preferred condition, the technical solution provided by this invention can further improve the thermal insulation performance of TPO composite waterproof membrane.

[0048] In a preferred embodiment, the material forming the adhesive layer 3 is hot melt adhesive and / or butyl rubber.

[0049] In a preferred embodiment, the hot melt adhesive is a polyurethane hot melt adhesive.

[0050] In one specific embodiment of the present invention, the flame retardancy rating of the hot melt adhesive and the butyl rubber is B2(E).

[0051] In a preferred embodiment, the polymer film layer 4 is a polyolefin film and / or an ethylene-vinyl alcohol copolymer film (EVOH film).

[0052] Preferably, the width of the TPO material layer 1 is 1990-2010 mm. Exemplarily, in one specific embodiment of the present invention, the width of the TPO material layer 1 is 2006 mm.

[0053] Preferably, the distance between the outermost edge of the texture structure 5 and the outer edge of the TPO material layer 1 is 5-15 mm.

[0054] In this invention, the outermost side of the texture structure 5 refers to the side that is closest to the outer edge of the TPO material layer.

[0055] In one specific embodiment of the present invention, the width of the aerogel layer 2 is 1950 mm.

[0056] The present invention does not have any special requirements on the method used to set the texture structure 5, as long as the set texture structure 5 can be realized. For example, the texture structure 5 is realized by laser welding or hot pressing.

[0057] The present invention does not impose any particular requirements on the preparation method of the TPO composite waterproof membrane, and those in the art can choose according to their needs.

[0058] For example, the preparation method of the TPO composite waterproof membrane of the present invention includes:

[0059] S1: The formulation forming the TPO material layer is extruded using a single-screw extruder to obtain a TPO material layer 1 with a thickness of 1.0 mm;

[0060] S2: Select a silica aerogel felt with a thickness of 1.5mm as aerogel layer 2, and perform a first pressure roller treatment on the aerogel layer 2 and the TPO material layer 1 to achieve the bonding of the aerogel layer 2 and the TPO material layer 1 and make the two sides of the TPO material layer 1 symmetrically distributed with respect to the center of the TPO material layer 1 to obtain intermediate product I.

[0061] S3: Apply polyurethane hot melt adhesive to one side of the aerogel layer 2 in the intermediate product I using an adhesive applicator to form an adhesive layer 3 with a thickness of 0.25 mm, thereby obtaining intermediate product II;

[0062] S4: Select an EVOH film with a thickness of 0.15mm as the polymer film layer 4, and perform a second pressure roller treatment on the polymer film layer 4 so that the polymer film layer 4 covers the two sides of the TPO material layer 1 in the intermediate product II and covers the adhesive layer 3 in the intermediate product II, to obtain intermediate product III;

[0063] S5: Laser welding is used to form a textured structure 5 at the edge where the polymer film layer 4 in the intermediate product III is bonded to the TPO material layer 1, and the textured structure 5 includes three textures, thus obtaining a TPO composite waterproof membrane.

[0064] The present invention does not impose any particular requirements on the formulation for forming the TPO material layer, and those skilled in the art can select one as needed. For example, the formulation for forming the TPO material layer is a combination of 60 parts by weight of polyolefin elastomer, 20 parts by weight of polypropylene resin, 20 parts by weight of polyethylene resin, and 0.5 parts by weight of carbon black.

[0065] The present invention does not impose any particular requirements on the extrusion molding conditions, and those skilled in the art can select them as needed. Exemplarily, in one specific embodiment of the present invention, the screw temperature settings of the extruder are: feeding section 170-180℃, plasticizing section 180-200℃, metering section 200-210℃, die temperature 190-200℃, and screw speed 10-40 rpm.

[0066] The present invention does not have any special requirements for the model of the single screw extruder, and those skilled in the art can select it as needed.

[0067] The present invention does not have special requirements for the conditions of the first pressure roller treatment. It is only necessary to achieve a tight fit between the TPO material layer 1 and the aerogel layer 2. The art can make the selection as needed.

[0068] The present invention does not have any special requirements for the model of the glue applicator; those skilled in the art can select one as needed.

[0069] The present invention does not have special requirements for the conditions of the second pressure roller treatment. It is only necessary to ensure that the polymer film layer 4 tightly covers the two sides of the TPO material layer 1 and tightly covers the adhesive layer 3. Those skilled in the art can choose according to their needs.

[0070] It should be noted that in this invention, both the first and second pressure roller treatments are performed using a roller press. This invention does not have any particular requirements regarding the model of the roller press; those skilled in the art can select one as needed.

[0071] The present invention does not impose special requirements on the conditions of the laser welding process, as long as the set texture structure 5 can be achieved. For example, in one specific embodiment of the present invention, the laser welding process is implemented using three lasers connected in parallel.

[0072] Preferably, the three lasers connected in series are each independently selected from at least one of neodymium-doped yttrium aluminum garnet (Nd:YAG) lasers, semiconductor diode lasers, and carbon dioxide lasers.

[0073] For example, in one specific embodiment of the present invention, three parallel carbon dioxide lasers are used for laser welding; and the power of each of the three parallel carbon dioxide lasers is independently 30W-100W, and the spot diameter of the laser emitted by the three parallel carbon dioxide lasers is between 0.2-1mm; the speed of the laser welding process is 50mm / s-200mm / s.

[0074] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A TPO composite waterproofing membrane, characterized in that, The waterproof roll material comprises a surface layer structure and an inner layer structure; The inner layer structure comprises a TPO material layer (1), an aerogel layer (2) and a viscose layer (3) arranged in sequence, the width of the aerogel layer (2) and the viscose layer (3) is equal, and the width of the aerogel layer (2) is smaller than the width of the TPO material layer (1) so that two side edges of the TPO material layer (1) are left; The surface layer structure is a polymer film layer (4) located on one side surface of the inner layer structure; the polymer film layer (4) covers the two side edges of the TPO material layer (1) in the inner layer structure and covers the viscose layer (3); the edge of the polymer film layer (4) adhered to the TPO material layer (1) is provided with a texture structure (5), and the texture structure (5) comprises at least two textures.

2. The TPO composite waterproofing membrane of claim 1, wherein, The width of the aerogel layer (2) is 97%-99% of the width of the TPO material layer (1).

3. The TPO sheeting of claim 1 or 2, wherein, The thickness of the TPO material layer (1) is 0.6-1.5mm; the thickness of the aerogel layer (2) is 0.5-2mm.

4. The TPO sheeting of claim 1 or 2, wherein, The thickness of the viscose layer (3) is 0.15-0.25mm; the thickness of the polymer film layer (4) is 0.02-0.5mm.

5. The TPO sheeting of claim 1 or 2, wherein, The texture structure (5) comprises a first texture (51) and a second texture (52) symmetrically distributed about the first texture (51) as a central axis.

6. The TPO composite waterproofing membrane of claim 5, wherein, The second texture (52) is continuously and jaggedly distributed.

7. The TPO composite waterproofing membrane of claim 5, wherein, The second texture (52) comprises a plurality of circular arc units arranged in a circular arc shape, and adjacent circular arc units are sequentially connected.

8. The TPO sheeting of claims 1 or 2, wherein, The aerogel layer (2) is a silica aerogel felt.

9. The TPO sheeting of claims 1 or 2, wherein, The material forming the viscose layer (3) is hot melt adhesive and / or butyl adhesive.

10. The TPO sheeting of claims 1 or 2, wherein, The width of the TPO material layer (1) is 1990-2010mm.

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